From 5011b6a51a350f19a8e70bd72656300dc0299dce Mon Sep 17 00:00:00 2001 From: zadam Date: Sat, 3 Jul 2021 20:52:40 +0200 Subject: [PATCH 1/2] don't try to fill additional properties for erased entities --- src/services/ws.js | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/services/ws.js b/src/services/ws.js index e37e06c9c..bb4b5bcf2 100644 --- a/src/services/ws.js +++ b/src/services/ws.js @@ -75,6 +75,10 @@ function sendMessageToAllClients(message) { } function fillInAdditionalProperties(entityChange) { + if (entityChange.isErased) { + return; + } + // fill in some extra data needed by the frontend if (entityChange.entityName === 'attributes') { entityChange.entity = sql.getRow(`SELECT * FROM attributes WHERE attributeId = ?`, [entityChange.entityId]); From 65938c5272047476586598ab1bdd64ae9bfd63d8 Mon Sep 17 00:00:00 2001 From: zadam Date: Mon, 5 Jul 2021 10:13:52 +0200 Subject: [PATCH 2/2] enable autoformat plugin in ckeditor build, closes #1339 --- libraries/ckeditor/ckeditor.js | 2 +- libraries/ckeditor/ckeditor.js.map | 2 +- src/public/app/widgets/attribute_widgets/attribute_editor.js | 1 + 3 files changed, 3 insertions(+), 2 deletions(-) diff --git a/libraries/ckeditor/ckeditor.js b/libraries/ckeditor/ckeditor.js index e65ae2d60..47153910e 100644 --- a/libraries/ckeditor/ckeditor.js +++ b/libraries/ckeditor/ckeditor.js @@ -2,5 +2,5 @@ * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. 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o=i(1),n=i(79);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=".ck-content .image>figcaption{display:table-caption;caption-side:bottom;word-break:break-word;color:#333;background-color:#f7f7f7;padding:.6em;font-size:.75em;outline-offset:-1px}"},function(e,t,i){var o=i(1),n=i(81);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=":root{--ck-image-style-spacing:1.5em}.ck-content .image-style-side{float:right;margin-left:var(--ck-image-style-spacing);max-width:50%}.ck-content .image-style-align-left{float:left;margin-right:var(--ck-image-style-spacing)}.ck-content .image-style-align-center{margin-left:auto;margin-right:auto}.ck-content 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r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports='.ck-image-upload-complete-icon{display:block;position:absolute;top:10px;right:10px;border-radius:50%}.ck-image-upload-complete-icon:after{content:"";position:absolute}:root{--ck-color-image-upload-icon:#fff;--ck-color-image-upload-icon-background:#008a00;--ck-image-upload-icon-size:20px;--ck-image-upload-icon-width:2px}.ck-image-upload-complete-icon{width:var(--ck-image-upload-icon-size);height:var(--ck-image-upload-icon-size);opacity:0;background:var(--ck-color-image-upload-icon-background);animation-name:ck-upload-complete-icon-show,ck-upload-complete-icon-hide;animation-fill-mode:forwards,forwards;animation-duration:.5s,.5s;font-size:var(--ck-image-upload-icon-size);animation-delay:0ms,3s}.ck-image-upload-complete-icon:after{left:25%;top:50%;opacity:0;height:0;width:0;transform:scaleX(-1) rotate(135deg);transform-origin:left top;border-top:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);border-right:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);animation-name:ck-upload-complete-icon-check;animation-duration:.5s;animation-delay:.5s;animation-fill-mode:forwards;box-sizing:border-box}@keyframes ck-upload-complete-icon-show{0%{opacity:0}to{opacity:1}}@keyframes ck-upload-complete-icon-hide{0%{opacity:1}to{opacity:0}}@keyframes ck-upload-complete-icon-check{0%{opacity:1;width:0;height:0}33%{width:.3em;height:0}to{opacity:1;width:.3em;height:.45em}}'},function(e,t,i){var o=i(1),n=i(87);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports='.ck .ck-upload-placeholder-loader{position:absolute;display:flex;align-items:center;justify-content:center;top:0;left:0}.ck 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span:after{content:"";width:0;height:0;display:block;position:absolute;left:50%;top:calc(var(--ck-clipboard-drop-target-dot-height)*-0.5);transform:translateX(-50%);border-left:calc(var(--ck-clipboard-drop-target-dot-width)*0.5) solid transparent;border-bottom:0 solid transparent;border-right:calc(var(--ck-clipboard-drop-target-dot-width)*0.5) solid transparent;border-top:calc(var(--ck-clipboard-drop-target-dot-height)) solid var(--ck-clipboard-drop-target-color)}.ck.ck-editor__editable .ck-widget.ck-clipboard-drop-target-range{outline:var(--ck-widget-outline-thickness) solid var(--ck-clipboard-drop-target-color)!important}.ck.ck-editor__editable .ck-widget:-webkit-drag{zoom:.6;outline:none!important}'},function(e,t,i){var o=i(1),n=i(91);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=".ck-content 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var(--ck-color-base-text);margin-right:-1px;outline:1px solid hsla(0,0%,100%,.5)}"},function(e,t,i){var o=i(1),n=i(95);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=".ck.ck-link-form{display:flex}.ck.ck-link-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-link-form{flex-wrap:wrap}.ck.ck-link-form .ck-labeled-field-view{flex-basis:100%}.ck.ck-link-form .ck-button{flex-basis:50%}}.ck.ck-link-form_layout-vertical{display:block}.ck.ck-link-form_layout-vertical .ck-button.ck-button-cancel,.ck.ck-link-form_layout-vertical .ck-button.ck-button-save{margin-top:var(--ck-spacing-medium)}.ck.ck-link-form_layout-vertical{padding:0;min-width:var(--ck-input-text-width)}.ck.ck-link-form_layout-vertical .ck-labeled-field-view{margin:var(--ck-spacing-large) var(--ck-spacing-large) var(--ck-spacing-small)}.ck.ck-link-form_layout-vertical .ck-labeled-field-view .ck-input-text{min-width:0;width:100%}.ck.ck-link-form_layout-vertical .ck-button{padding:var(--ck-spacing-standard);margin:0;border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border);width:50%}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button,[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}.ck.ck-link-form_layout-vertical .ck.ck-list{margin:var(--ck-spacing-standard) var(--ck-spacing-large)}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton{border:0;padding:0;width:100%}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton:hover{background:none}"},function(e,t,i){var o=i(1),n=i(97);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=".ck.ck-link-actions{display:flex;flex-direction:row;flex-wrap:nowrap}.ck.ck-link-actions .ck-link-actions__preview{display:inline-block}.ck.ck-link-actions .ck-link-actions__preview .ck-button__label{overflow:hidden}@media screen and (max-width:600px){.ck.ck-link-actions{flex-wrap:wrap}.ck.ck-link-actions .ck-link-actions__preview{flex-basis:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){flex-basis:50%}}.ck.ck-link-actions .ck-button.ck-link-actions__preview{padding-left:0;padding-right:0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{padding:0 var(--ck-spacing-medium);color:var(--ck-color-link-default);text-overflow:ellipsis;cursor:pointer;max-width:var(--ck-input-text-width);min-width:3em;text-align:center}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label:hover{text-decoration:underline}.ck.ck-link-actions .ck-button.ck-link-actions__preview,.ck.ck-link-actions .ck-button.ck-link-actions__preview:active,.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus,.ck.ck-link-actions .ck-button.ck-link-actions__preview:hover{background:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:active{box-shadow:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus .ck-button__label{text-decoration:underline}[dir=ltr] .ck.ck-link-actions .ck-button:not(:first-child),[dir=rtl] .ck.ck-link-actions .ck-button:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-actions .ck-button.ck-link-actions__preview{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{min-width:0;max-width:100%}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview),[dir=rtl] 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.ck-button{width:var(--ck-list-style-button-size);height:var(--ck-list-style-button-size);padding:0;margin:0;box-sizing:content-box}.ck.ck-list-styles-dropdown>.ck-dropdown__panel>.ck-toolbar>.ck-toolbar__items .ck-button .ck-icon{width:var(--ck-list-style-button-size);height:var(--ck-list-style-button-size)}"},function(e,t,i){var o=i(1),n=i(101);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=':root{--ck-todo-list-checkmark-size:16px}.ck-content .todo-list{list-style:none}.ck-content .todo-list li{margin-bottom:5px}.ck-content .todo-list li .todo-list{margin-top:5px}.ck-content .todo-list 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transparent;border-right:calc(var(--ck-todo-list-checkmark-size)/8) solid transparent;border-top:0 solid transparent;transform:rotate(45deg)}.ck-content .todo-list .todo-list__label>input[checked]:before{background:#26ab33;border-color:#26ab33}.ck-content .todo-list .todo-list__label>input[checked]:after{border-color:#fff}.ck-content .todo-list .todo-list__label .todo-list__label__description{vertical-align:middle}[dir=rtl] .todo-list .todo-list__label>input{left:0;margin-right:0;right:-25px;margin-left:-15px}.ck-editor__editable .todo-list .todo-list__label>input{cursor:pointer}.ck-editor__editable .todo-list .todo-list__label>input:hover:before{box-shadow:0 0 0 5px rgba(0,0,0,.1)}'},function(e,t,i){var o=i(1),n=i(103);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=":root{--ck-color-table-focused-cell-background:rgba(158,207,250,0.3)}.ck-widget.table td.ck-editor__nested-editable.ck-editor__nested-editable_focused,.ck-widget.table td.ck-editor__nested-editable:focus,.ck-widget.table th.ck-editor__nested-editable.ck-editor__nested-editable_focused,.ck-widget.table th.ck-editor__nested-editable:focus{background:var(--ck-color-table-focused-cell-background);border-style:none;outline:1px solid var(--ck-color-focus-border);outline-offset:-1px}"},function(e,t,i){var o=i(1),n=i(105);"string"==typeof(n=n.__esModule?n.default:n)&&(n=[[e.i,n,""]]);var r={injectType:"singletonStyleTag",attributes:{"data-cke":!0},insert:"head",singleton:!0};o(n,r);e.exports=n.locals||{}},function(e,t){e.exports=".ck 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t?t===this.name&&("editableElement"===e||"view:editableElement"===e||"containerElement"===e||"view:containerElement"===e||"element"===e||"view:element"===e):"editableElement"===e||"view:editableElement"===e||"containerElement"===e||"view:containerElement"===e||"element"===e||"view:element"===e||"node"===e||"view:node"===e}destroy(){this.stopListening()}}Ye(rn,qe);const sn=Symbol("rootName");class an extends rn{constructor(e,t){super(e,t),this.rootName="main"}is(e,t=null){return t?t===this.name&&("rootElement"===e||"view:rootElement"===e||"editableElement"===e||"view:editableElement"===e||"containerElement"===e||"view:containerElement"===e||"element"===e||"view:element"===e):"rootElement"===e||"view:rootElement"===e||"editableElement"===e||"view:editableElement"===e||"containerElement"===e||"view:containerElement"===e||"element"===e||"view:element"===e||"node"===e||"view:node"===e}get rootName(){return this.getCustomProperty(sn)}set rootName(e){this._setCustomProperty(sn,e)}set 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e=this.position.clone();const t=this.position,i=e.parent;if(null===i.parent&&e.offset===i.childCount)return{done:!0};if(i===this._boundaryEndParent&&e.offset==this.boundaries.end.offset)return{done:!0};let o;if(i instanceof uo){if(e.isAtEnd)return this.position=cn._createAfter(i),this._next();o=i.data[e.offset]}else o=i.getChild(e.offset);if(o instanceof en)return this.shallow?e.offset++:e=new cn(o,0),this.position=e,this._formatReturnValue("elementStart",o,t,e,1);if(o instanceof uo){if(this.singleCharacters)return e=new cn(o,0),this.position=e,this._next();{let i,n=o.data.length;return o==this._boundaryEndParent?(n=this.boundaries.end.offset,i=new mo(o,0,n),e=cn._createAfter(i)):(i=new mo(o,0,o.data.length),e.offset++),this.position=e,this._formatReturnValue("text",i,t,e,n)}}if("string"==typeof o){let o;if(this.singleCharacters)o=1;else{o=(i===this._boundaryEndParent?this.boundaries.end.offset:i.data.length)-e.offset}const n=new mo(i,e.offset,o);return e.offset+=o,this.position=e,this._formatReturnValue("text",n,t,e,o)}return e=cn._createAfter(i),this.position=e,this.ignoreElementEnd?this._next():this._formatReturnValue("elementEnd",i,t,e)}_previous(){let e=this.position.clone();const t=this.position,i=e.parent;if(null===i.parent&&0===e.offset)return{done:!0};if(i==this._boundaryStartParent&&e.offset==this.boundaries.start.offset)return{done:!0};let o;if(i instanceof uo){if(e.isAtStart)return this.position=cn._createBefore(i),this._previous();o=i.data[e.offset-1]}else o=i.getChild(e.offset-1);if(o instanceof en)return this.shallow?(e.offset--,this.position=e,this._formatReturnValue("elementStart",o,t,e,1)):(e=new cn(o,o.childCount),this.position=e,this.ignoreElementEnd?this._previous():this._formatReturnValue("elementEnd",o,t,e));if(o instanceof uo){if(this.singleCharacters)return e=new cn(o,o.data.length),this.position=e,this._previous();{let i,n=o.data.length;if(o==this._boundaryStartParent){const t=this.boundaries.start.offset;i=new mo(o,t,o.data.length-t),n=i.data.length,e=cn._createBefore(i)}else i=new mo(o,0,o.data.length),e.offset--;return this.position=e,this._formatReturnValue("text",i,t,e,n)}}if("string"==typeof o){let o;if(this.singleCharacters)o=1;else{const t=i===this._boundaryStartParent?this.boundaries.start.offset:0;o=e.offset-t}e.offset-=o;const n=new mo(i,e.offset,o);return this.position=e,this._formatReturnValue("text",n,t,e,o)}return e=cn._createBefore(i),this.position=e,this._formatReturnValue("elementStart",i,t,e,1)}_formatReturnValue(e,t,i,o,n){return t instanceof mo&&(t.offsetInText+t.data.length==t.textNode.data.length&&("forward"!=this.direction||this.boundaries&&this.boundaries.end.isEqual(this.position)?i=cn._createAfter(t.textNode):(o=cn._createAfter(t.textNode),this.position=o)),0===t.offsetInText&&("backward"!=this.direction||this.boundaries&&this.boundaries.start.isEqual(this.position)?i=cn._createBefore(t.textNode):(o=cn._createBefore(t.textNode),this.position=o))),{done:!1,value:{type:e,item:t,previousPosition:i,nextPosition:o,length:n}}}}class cn{constructor(e,t){this.parent=e,this.offset=t}get nodeAfter(){return this.parent.is("$text")?null:this.parent.getChild(this.offset)||null}get nodeBefore(){return this.parent.is("$text")?null:this.parent.getChild(this.offset-1)||null}get isAtStart(){return 0===this.offset}get isAtEnd(){const e=this.parent.is("$text")?this.parent.data.length:this.parent.childCount;return this.offset===e}get root(){return this.parent.root}get editableElement(){let e=this.parent;for(;!(e instanceof rn);){if(!e.parent)return null;e=e.parent}return e}getShiftedBy(e){const t=cn._createAt(this),i=t.offset+e;return t.offset=i<0?0:i,t}getLastMatchingPosition(e,t={}){t.startPosition=this;const i=new ln(t);return i.skip(e),i.position}getAncestors(){return this.parent.is("documentFragment")?[this.parent]:this.parent.getAncestors({includeSelf:!0})}getCommonAncestor(e){const t=this.getAncestors(),i=e.getAncestors();let o=0;for(;t[o]==i[o]&&t[o];)o++;return 0===o?null:t[o-1]}is(e){return"position"===e||"view:position"===e}isEqual(e){return this.parent==e.parent&&this.offset==e.offset}isBefore(e){return"before"==this.compareWith(e)}isAfter(e){return"after"==this.compareWith(e)}compareWith(e){if(this.root!==e.root)return"different";if(this.isEqual(e))return"same";const t=this.parent.is("node")?this.parent.getPath():[],i=e.parent.is("node")?e.parent.getPath():[];t.push(this.offset),i.push(e.offset);const 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e.getStyleNames())if(!t.hasStyle(i)||t.getStyle(i)!==e.getStyle(i))return!1;for(const i of e.getAttributeKeys())"class"!==i&&"style"!==i&&this.removeAttribute(i,t);return this.removeClass(Array.from(e.getClassNames()),t),this.removeStyle(Array.from(e.getStyleNames()),t),!0}_breakAttributesRange(e,t=!1){const i=e.start,o=e.end;if(Zn(e,this.document),e.isCollapsed){const i=this._breakAttributes(e.start,t);return new dn(i,i)}const n=this._breakAttributes(o,t),r=n.parent.childCount,s=this._breakAttributes(i,t);return n.offset+=n.parent.childCount-r,new dn(s,n)}_breakAttributes(e,t=!1){const i=e.offset,o=e.parent;if(e.parent.is("emptyElement"))throw new l.a("view-writer-cannot-break-empty-element",this.document);if(e.parent.is("uiElement"))throw new l.a("view-writer-cannot-break-ui-element",this.document);if(e.parent.is("rawElement"))throw new l.a("view-writer-cannot-break-raw-element",this.document);if(!t&&o.is("$text")&&Xn(o.parent))return e.clone();if(Xn(o))return e.clone();if(o.is("$text"))return this._breakAttributes(Jn(e),t);if(i==o.childCount){const e=new cn(o.parent,o.index+1);return this._breakAttributes(e,t)}if(0===i){const e=new cn(o.parent,o.index);return this._breakAttributes(e,t)}{const e=o.index+1,n=o._clone();o.parent._insertChild(e,n),this._addToClonedElementsGroup(n);const r=o.childCount-i,s=o._removeChildren(i,r);n._appendChild(s);const a=new cn(o.parent,e);return this._breakAttributes(a,t)}}_addToClonedElementsGroup(e){if(!e.root.is("rootElement"))return;if(e.is("element"))for(const t of e.getChildren())this._addToClonedElementsGroup(t);const t=e.id;if(!t)return;let i=this._cloneGroups.get(t);i||(i=new Set,this._cloneGroups.set(t,i)),i.add(e),e._clonesGroup=i}_removeFromClonedElementsGroup(e){if(e.is("element"))for(const t of e.getChildren())this._removeFromClonedElementsGroup(t);const t=e.id;if(!t)return;const i=this._cloneGroups.get(t);i&&i.delete(e)}}function Un(e){let t=e.parent;for(;!Xn(t);){if(!t)return;t=t.parent}return t}function Kn(e,t){return e.priorityt.priority)&&e.getIdentity()e.createTextNode(" "),or=e=>{const t=e.createElement("span");return t.dataset.ckeFiller=!0,t.innerHTML=" ",t},nr=e=>{const t=e.createElement("br");return t.dataset.ckeFiller=!0,t},rr="⁠".repeat(7);function sr(e){return tr(e)&&e.data.substr(0,7)===rr}function ar(e){return 7==e.data.length&&sr(e)}function lr(e){return sr(e)?e.data.slice(7):e.data}function cr(e,t){if(t.keyCode==Vn.arrowleft){const e=t.domTarget.ownerDocument.defaultView.getSelection();if(1==e.rangeCount&&e.getRangeAt(0).collapsed){const t=e.getRangeAt(0).startContainer,i=e.getRangeAt(0).startOffset;sr(t)&&i<=7&&e.collapse(t,0)}}}function dr(e,t,i,o=!1){i=i||function(e,t){return e===t},Array.isArray(e)||(e=Array.prototype.slice.call(e)),Array.isArray(t)||(t=Array.prototype.slice.call(t));const n=function(e,t,i){const o=hr(e,t,i);if(-1===o)return{firstIndex:-1,lastIndexOld:-1,lastIndexNew:-1};const n=ur(e,o),r=ur(t,o),s=hr(n,r,i),a=e.length-s,l=t.length-s;return{firstIndex:o,lastIndexOld:a,lastIndexNew:l}}(e,t,i);return o?function(e,t){const{firstIndex:i,lastIndexOld:o,lastIndexNew:n}=e;if(-1===i)return Array(t).fill("equal");let r=[];i>0&&(r=r.concat(Array(i).fill("equal")));n-i>0&&(r=r.concat(Array(n-i).fill("insert")));o-i>0&&(r=r.concat(Array(o-i).fill("delete")));n0&&i.push({index:o,type:"insert",values:e.slice(o,r)});n-o>0&&i.push({index:o+(r-o),type:"delete",howMany:n-o});return i}(t,n)}function hr(e,t,i){for(let o=0;o200||n>200||o+n>300)return mr.fastDiff(e,t,i,!0);let r,s;if(nc?-1:1;d[o+u]&&(d[o]=d[o+u].slice(0)),d[o]||(d[o]=[]),d[o].push(n>c?r:s);let m=Math.max(n,c),g=m-o;for(;gc;m--)h[m]=u(m);h[c]=u(c),g++}while(h[c]!==l);return d[c].slice(1)}function gr(e,t,i){e.insertBefore(i,e.childNodes[t]||null)}function fr(e){const t=e.parentNode;t&&t.removeChild(e)}function pr(e){if(e){if(e.defaultView)return e instanceof e.defaultView.Document;if(e.ownerDocument&&e.ownerDocument.defaultView)return e instanceof e.ownerDocument.defaultView.Node}return!1}mr.fastDiff=dr;class br{constructor(e,t){this.domDocuments=new Set,this.domConverter=e,this.markedAttributes=new Set,this.markedChildren=new Set,this.markedTexts=new Set,this.selection=t,this.isFocused=!1,this._inlineFiller=null,this._fakeSelectionContainer=null}markToSync(e,t){if("text"===e)this.domConverter.mapViewToDom(t.parent)&&this.markedTexts.add(t);else{if(!this.domConverter.mapViewToDom(t))return;if("attributes"===e)this.markedAttributes.add(t);else{if("children"!==e)throw new l.a("view-renderer-unknown-type",this);this.markedChildren.add(t)}}}render(){let e;for(const e of this.markedChildren)this._updateChildrenMappings(e);this._inlineFiller&&!this._isSelectionInInlineFiller()&&this._removeInlineFiller(),this._inlineFiller?e=this._getInlineFillerPosition():this._needsInlineFillerAtSelection()&&(e=this.selection.getFirstPosition(),this.markedChildren.add(e.parent));for(const e of this.markedAttributes)this._updateAttrs(e);for(const t of this.markedChildren)this._updateChildren(t,{inlineFillerPosition:e});for(const t of this.markedTexts)!this.markedChildren.has(t.parent)&&this.domConverter.mapViewToDom(t.parent)&&this._updateText(t,{inlineFillerPosition:e});if(e){const t=this.domConverter.viewPositionToDom(e),i=t.parent.ownerDocument;sr(t.parent)?this._inlineFiller=t.parent:this._inlineFiller=wr(i,t.parent,t.offset)}else this._inlineFiller=null;this._updateFocus(),this._updateSelection(),this.markedTexts.clear(),this.markedAttributes.clear(),this.markedChildren.clear()}_updateChildrenMappings(e){const t=this.domConverter.mapViewToDom(e);if(!t)return;const i=this.domConverter.mapViewToDom(e).childNodes,o=Array.from(this.domConverter.viewChildrenToDom(e,t.ownerDocument,{withChildren:!1})),n=this._diffNodeLists(i,o),r=this._findReplaceActions(n,i,o);if(-1!==r.indexOf("replace")){const t={equal:0,insert:0,delete:0};for(const n of r)if("replace"===n){const n=t.equal+t.insert,r=t.equal+t.delete,s=e.getChild(n);!s||s.is("uiElement")||s.is("rawElement")||this._updateElementMappings(s,i[r]),fr(o[n]),t.equal++}else t[n]++}}_updateElementMappings(e,t){this.domConverter.unbindDomElement(t),this.domConverter.bindElements(t,e),this.markedChildren.add(e),this.markedAttributes.add(e)}_getInlineFillerPosition(){const e=this.selection.getFirstPosition();return e.parent.is("$text")?cn._createBefore(this.selection.getFirstPosition().parent):e}_isSelectionInInlineFiller(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const e=this.selection.getFirstPosition(),t=this.domConverter.viewPositionToDom(e);return!!(t&&tr(t.parent)&&sr(t.parent))}_removeInlineFiller(){const e=this._inlineFiller;if(!sr(e))throw new l.a("view-renderer-filler-was-lost",this);ar(e)?e.parentNode.removeChild(e):e.data=e.data.substr(7),this._inlineFiller=null}_needsInlineFillerAtSelection(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const e=this.selection.getFirstPosition(),t=e.parent,i=e.offset;if(!this.domConverter.mapViewToDom(t.root))return!1;if(!t.is("element"))return!1;if(!function(e){if("false"==e.getAttribute("contenteditable"))return!1;const t=e.findAncestor(e=>e.hasAttribute("contenteditable"));return!t||"true"==t.getAttribute("contenteditable")}(t))return!1;if(i===t.getFillerOffset())return!1;const o=e.nodeBefore,n=e.nodeAfter;return!(o instanceof uo||n instanceof uo)}_updateText(e,t){const i=this.domConverter.findCorrespondingDomText(e),o=this.domConverter.viewToDom(e,i.ownerDocument),n=i.data;let r=o.data;const s=t.inlineFillerPosition;if(s&&s.parent==e.parent&&s.offset==e.index&&(r=rr+r),n!=r){const e=dr(n,r);for(const t of e)"insert"===t.type?i.insertData(t.index,t.values.join("")):i.deleteData(t.index,t.howMany)}}_updateAttrs(e){const t=this.domConverter.mapViewToDom(e);if(!t)return;const i=Array.from(t.attributes).map(e=>e.name),o=e.getAttributeKeys();for(const i of o)t.setAttribute(i,e.getAttribute(i));for(const o of i)e.hasAttribute(o)||t.removeAttribute(o)}_updateChildren(e,t){const i=this.domConverter.mapViewToDom(e);if(!i)return;const o=t.inlineFillerPosition,n=this.domConverter.mapViewToDom(e).childNodes,r=Array.from(this.domConverter.viewChildrenToDom(e,i.ownerDocument,{bind:!0,inlineFillerPosition:o}));o&&o.parent===e&&wr(i.ownerDocument,r,o.offset);const s=this._diffNodeLists(n,r);let a=0;const l=new Set;for(const e of s)"delete"===e?(l.add(n[a]),fr(n[a])):"equal"===e&&a++;a=0;for(const e of s)"insert"===e?(gr(i,a,r[a]),a++):"equal"===e&&(this._markDescendantTextToSync(this.domConverter.domToView(r[a])),a++);for(const e of l)e.parentNode||this.domConverter.unbindDomElement(e)}_diffNodeLists(e,t){return mr(e=function(e,t){const i=Array.from(e);if(0==i.length||!t)return i;i[i.length-1]==t&&i.pop();return i}(e,this._fakeSelectionContainer),t,_r.bind(null,this.domConverter))}_findReplaceActions(e,t,i){if(-1===e.indexOf("insert")||-1===e.indexOf("delete"))return e;let o=[],n=[],r=[];const s={equal:0,insert:0,delete:0};for(const a of e)"insert"===a?r.push(i[s.equal+s.insert]):"delete"===a?n.push(t[s.equal+s.delete]):(o=o.concat(mr(n,r,kr).map(e=>"equal"===e?"replace":e)),o.push("equal"),n=[],r=[]),s[a]++;return o.concat(mr(n,r,kr).map(e=>"equal"===e?"replace":e))}_markDescendantTextToSync(e){if(e)if(e.is("$text"))this.markedTexts.add(e);else if(e.is("element"))for(const t of e.getChildren())this._markDescendantTextToSync(t)}_updateSelection(){if(0===this.selection.rangeCount)return this._removeDomSelection(),void this._removeFakeSelection();const e=this.domConverter.mapViewToDom(this.selection.editableElement);this.isFocused&&e&&(this.selection.isFake?this._updateFakeSelection(e):(this._removeFakeSelection(),this._updateDomSelection(e)))}_updateFakeSelection(e){const t=e.ownerDocument;this._fakeSelectionContainer||(this._fakeSelectionContainer=function(e){const t=e.createElement("div");return t.className="ck-fake-selection-container",Object.assign(t.style,{position:"fixed",top:0,left:"-9999px",width:"42px"}),t.textContent=" ",t}(t));const i=this._fakeSelectionContainer;if(this.domConverter.bindFakeSelection(i,this.selection),!this._fakeSelectionNeedsUpdate(e))return;i.parentElement&&i.parentElement==e||e.appendChild(i),i.textContent=this.selection.fakeSelectionLabel||" ";const o=t.getSelection(),n=t.createRange();o.removeAllRanges(),n.selectNodeContents(i),o.addRange(n)}_updateDomSelection(e){const t=e.ownerDocument.defaultView.getSelection();if(!this._domSelectionNeedsUpdate(t))return;const i=this.domConverter.viewPositionToDom(this.selection.anchor),o=this.domConverter.viewPositionToDom(this.selection.focus);t.collapse(i.parent,i.offset),t.extend(o.parent,o.offset),Sn.isGecko&&function(e,t){const i=e.parent;if(i.nodeType!=Node.ELEMENT_NODE||e.offset!=i.childNodes.length-1)return;const o=i.childNodes[e.offset];o&&"BR"==o.tagName&&t.addRange(t.getRangeAt(0))}(o,t)}_domSelectionNeedsUpdate(e){if(!this.domConverter.isDomSelectionCorrect(e))return!0;const t=e&&this.domConverter.domSelectionToView(e);return(!t||!this.selection.isEqual(t))&&!(!this.selection.isCollapsed&&this.selection.isSimilar(t))}_fakeSelectionNeedsUpdate(e){const t=this._fakeSelectionContainer,i=e.ownerDocument.getSelection();return!t||t.parentElement!==e||(i.anchorNode!==t&&!t.contains(i.anchorNode)||t.textContent!==this.selection.fakeSelectionLabel)}_removeDomSelection(){for(const e of this.domDocuments){if(e.getSelection().rangeCount){const t=e.activeElement,i=this.domConverter.mapDomToView(t);t&&i&&e.getSelection().removeAllRanges()}}}_removeFakeSelection(){const e=this._fakeSelectionContainer;e&&e.remove()}_updateFocus(){if(this.isFocused){const e=this.selection.editableElement;e&&this.domConverter.focus(e)}}}function wr(e,t,i){const o=t instanceof Array?t:t.childNodes,n=o[i];if(tr(n))return n.data=rr+n.data,n;{const n=e.createTextNode(rr);return Array.isArray(t)?o.splice(i,0,n):gr(t,i,n),n}}function kr(e,t){return pr(e)&&pr(t)&&!tr(e)&&!tr(t)&&e.nodeType!==Node.COMMENT_NODE&&t.nodeType!==Node.COMMENT_NODE&&e.tagName.toLowerCase()===t.tagName.toLowerCase()}function _r(e,t,i){return t===i||(tr(t)&&tr(i)?t.data===i.data:!(!e.isBlockFiller(t)||!e.isBlockFiller(i)))}Ye(br,qe);var vr={window:window,document:document};function yr(e){let t=0;for(;e.previousSibling;)e=e.previousSibling,t++;return t}function xr(e){const t=[];for(;e&&e.nodeType!=Node.DOCUMENT_NODE;)t.unshift(e),e=e.parentNode;return t}const Cr=nr(document),Ar=ir(document),Tr=or(document);class Er{constructor(e,t={}){this.document=e,this.blockFillerMode=t.blockFillerMode||"br",this.preElements=["pre"],this.blockElements=["p","div","h1","h2","h3","h4","h5","h6","li","dd","dt","figcaption","td","th"],this._domToViewMapping=new WeakMap,this._viewToDomMapping=new WeakMap,this._fakeSelectionMapping=new WeakMap,this._rawContentElementMatcher=new fo,this._encounteredRawContentDomNodes=new WeakSet}bindFakeSelection(e,t){this._fakeSelectionMapping.set(e,new mn(t))}fakeSelectionToView(e){return this._fakeSelectionMapping.get(e)}bindElements(e,t){this._domToViewMapping.set(e,t),this._viewToDomMapping.set(t,e)}unbindDomElement(e){const t=this._domToViewMapping.get(e);if(t){this._domToViewMapping.delete(e),this._viewToDomMapping.delete(t);for(const t of e.childNodes)this.unbindDomElement(t)}}bindDocumentFragments(e,t){this._domToViewMapping.set(e,t),this._viewToDomMapping.set(t,e)}viewToDom(e,t,i={}){if(e.is("$text")){const i=this._processDataFromViewText(e);return t.createTextNode(i)}{if(this.mapViewToDom(e))return this.mapViewToDom(e);let o;if(e.is("documentFragment"))o=t.createDocumentFragment(),i.bind&&this.bindDocumentFragments(o,e);else{if(e.is("uiElement"))return o=e.render(t),i.bind&&this.bindElements(o,e),o;o=e.hasAttribute("xmlns")?t.createElementNS(e.getAttribute("xmlns"),e.name):t.createElement(e.name),e.is("rawElement")&&e.render(o),i.bind&&this.bindElements(o,e);for(const t of e.getAttributeKeys())o.setAttribute(t,e.getAttribute(t))}if(!1!==i.withChildren)for(const n of this.viewChildrenToDom(e,t,i))o.appendChild(n);return o}}*viewChildrenToDom(e,t,i={}){const o=e.getFillerOffset&&e.getFillerOffset();let n=0;for(const r of e.getChildren())o===n&&(yield this._getBlockFiller(t)),yield this.viewToDom(r,t,i),n++;o===n&&(yield this._getBlockFiller(t))}viewRangeToDom(e){const t=this.viewPositionToDom(e.start),i=this.viewPositionToDom(e.end),o=document.createRange();return o.setStart(t.parent,t.offset),o.setEnd(i.parent,i.offset),o}viewPositionToDom(e){const t=e.parent;if(t.is("$text")){const i=this.findCorrespondingDomText(t);if(!i)return null;let o=e.offset;return sr(i)&&(o+=7),{parent:i,offset:o}}{let i,o,n;if(0===e.offset){if(i=this.mapViewToDom(t),!i)return null;n=i.childNodes[0]}else{const t=e.nodeBefore;if(o=t.is("$text")?this.findCorrespondingDomText(t):this.mapViewToDom(e.nodeBefore),!o)return null;i=o.parentNode,n=o.nextSibling}if(tr(n)&&sr(n))return{parent:n,offset:7};return{parent:i,offset:o?yr(o)+1:0}}}domToView(e,t={}){if(this.isBlockFiller(e))return null;const i=this.getHostViewElement(e);if(i)return i;if(tr(e)){if(ar(e))return null;{const t=this._processDataFromDomText(e);return""===t?null:new uo(this.document,t)}}if(this.isComment(e))return null;{if(this.mapDomToView(e))return this.mapDomToView(e);let i;if(this.isDocumentFragment(e))i=new qn(this.document),t.bind&&this.bindDocumentFragments(e,i);else{const o=t.keepOriginalCase?e.tagName:e.tagName.toLowerCase();i=new en(this.document,o),t.bind&&this.bindElements(e,i);const n=e.attributes;for(let e=n.length-1;e>=0;e--)i._setAttribute(n[e].name,n[e].value);if(!1!==t.withChildren&&this._rawContentElementMatcher.match(i))return i._setCustomProperty("$rawContent",e.innerHTML),this._encounteredRawContentDomNodes.add(e),i}if(!1!==t.withChildren)for(const o of this.domChildrenToView(e,t))i._appendChild(o);return i}}*domChildrenToView(e,t={}){for(let i=0;i{const{scrollLeft:t,scrollTop:i}=e;o.push([t,i])}),t.focus(),Sr(t,e=>{const[t,i]=o.shift();e.scrollLeft=t,e.scrollTop=i}),vr.window.scrollTo(e,i)}}isElement(e){return e&&e.nodeType==Node.ELEMENT_NODE}isDocumentFragment(e){return e&&e.nodeType==Node.DOCUMENT_FRAGMENT_NODE}isComment(e){return e&&e.nodeType==Node.COMMENT_NODE}isBlockFiller(e){return"br"==this.blockFillerMode?e.isEqualNode(Cr):!("BR"!==e.tagName||!Rr(e,this.blockElements)||1!==e.parentNode.childNodes.length)||(e.isEqualNode(Tr)||function(e,t){return e.isEqualNode(Ar)&&Rr(e,t)&&1===e.parentNode.childNodes.length}(e,this.blockElements))}isDomSelectionBackward(e){if(e.isCollapsed)return!1;const t=document.createRange();t.setStart(e.anchorNode,e.anchorOffset),t.setEnd(e.focusNode,e.focusOffset);const i=t.collapsed;return t.detach(),i}getHostViewElement(e){const t=xr(e);for(t.pop();t.length;){const e=t.pop(),i=this._domToViewMapping.get(e);if(i&&(i.is("uiElement")||i.is("rawElement")))return i}return null}isDomSelectionCorrect(e){return this._isDomSelectionPositionCorrect(e.anchorNode,e.anchorOffset)&&this._isDomSelectionPositionCorrect(e.focusNode,e.focusOffset)}registerRawContentMatcher(e){this._rawContentElementMatcher.add(e)}_getBlockFiller(e){switch(this.blockFillerMode){case"nbsp":return ir(e);case"markedNbsp":return or(e);case"br":return nr(e)}}_isDomSelectionPositionCorrect(e,t){if(tr(e)&&sr(e)&&t<7)return!1;if(this.isElement(e)&&sr(e.childNodes[t]))return!1;const i=this.mapDomToView(e);return!i||!i.is("uiElement")&&!i.is("rawElement")}_processDataFromViewText(e){let t=e.data;if(e.getAncestors().some(e=>this.preElements.includes(e.name)))return t;if(" "==t.charAt(0)){const i=this._getTouchingViewTextNode(e,!1);!(i&&this._nodeEndsWithSpace(i))&&i||(t=" "+t.substr(1))}if(" "==t.charAt(t.length-1)){const i=this._getTouchingViewTextNode(e,!0);" "!=t.charAt(t.length-2)&&i&&" "!=i.data.charAt(0)||(t=t.substr(0,t.length-1)+" ")}return t.replace(/ {2}/g,"  ")}_nodeEndsWithSpace(e){if(e.getAncestors().some(e=>this.preElements.includes(e.name)))return!1;const t=this._processDataFromViewText(e);return" "==t.charAt(t.length-1)}_processDataFromDomText(e){let t=e.data;if(Pr(e,this.preElements))return lr(e);t=t.replace(/[ \n\t\r]{1,}/g," ");const i=this._getTouchingInlineDomNode(e,!1),o=this._getTouchingInlineDomNode(e,!0),n=this._checkShouldLeftTrimDomText(e,i),r=this._checkShouldRightTrimDomText(e,o);return n&&(t=t.replace(/^ /,"")),r&&(t=t.replace(/ $/,"")),t=lr(new Text(t)),t=t.replace(/ \u00A0/g," "),(/( |\u00A0)\u00A0$/.test(t)||!o||o.data&&" "==o.data.charAt(0))&&(t=t.replace(/\u00A0$/," ")),n&&(t=t.replace(/^\u00A0/," ")),t}_checkShouldLeftTrimDomText(e,t){return!t||(!!Gi(t)||!this._encounteredRawContentDomNodes.has(e.previousSibling)&&/[^\S\u00A0]/.test(t.data.charAt(t.data.length-1)))}_checkShouldRightTrimDomText(e,t){return!t&&!sr(e)}_getTouchingViewTextNode(e,t){const i=new ln({startPosition:t?cn._createAfter(e):cn._createBefore(e),direction:t?"forward":"backward"});for(const e of i){if(e.item.is("containerElement"))return null;if(e.item.is("element","br"))return null;if(e.item.is("$textProxy"))return e.item}return null}_getTouchingInlineDomNode(e,t){if(!e.parentNode)return null;const i=t?"nextNode":"previousNode",o=e.ownerDocument,n=xr(e)[0],r=o.createTreeWalker(n,NodeFilter.SHOW_TEXT|NodeFilter.SHOW_ELEMENT,{acceptNode:e=>tr(e)||"BR"==e.tagName?NodeFilter.FILTER_ACCEPT:NodeFilter.FILTER_SKIP});r.currentNode=e;const s=r[i]();if(null!==s){const t=function(e,t){const i=xr(e),o=xr(t);let n=0;for(;i[n]==o[n]&&i[n];)n++;return 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e["data-ck-expando"]||(e["data-ck-expando"]=s())}Be(zr.prototype,h,{attach(e,t,i={}){if(this._domListeners&&this._domListeners[e])return;const o={capture:!!i.useCapture,passive:!!i.usePassive},n=this._createDomListener(e,o);this._domNode.addEventListener(e,n,o),this._domListeners||(this._domListeners={}),this._domListeners[e]=n},detach(e){let t;!this._domListeners[e]||(t=this._events[e])&&t.callbacks.length||this._domListeners[e].removeListener()},_createDomListener(e,t){const i=t=>{this.fire(e,t)};return i.removeListener=()=>{this._domNode.removeEventListener(e,i,t),delete this._domListeners[e]},i}});class Mr{constructor(e){this.view=e,this.document=e.document,this.isEnabled=!1}enable(){this.isEnabled=!0}disable(){this.isEnabled=!1}destroy(){this.disable(),this.stopListening()}checkShouldIgnoreEventFromTarget(e){return e&&3===e.nodeType&&(e=e.parentNode),!(!e||1!==e.nodeType)&&e.matches("[data-cke-ignore-events], [data-cke-ignore-events] *")}}Ye(Mr,Vr);var Nr=function(e){return this.__data__.set(e,"__lodash_hash_undefined__"),this};var Br=function(e){return this.__data__.has(e)};function Fr(e){var t=-1,i=null==e?0:e.length;for(this.__data__=new jt;++ta))return!1;var c=r.get(e),d=r.get(t);if(c&&d)return c==t&&d==e;var h=-1,u=!0,m=2&i?new Dr:void 0;for(r.set(e,t),r.set(t,e);++h{this.listenTo(e,t,(e,t)=>{this.isEnabled&&!this.checkShouldIgnoreEventFromTarget(t.target)&&this.onDomEvent(t)},{useCapture:this.useCapture})})}fire(e,t,i){this.isEnabled&&this.document.fire(e,new ts(this.view,t,i))}}class os extends is{constructor(e){super(e),this.domEventType=["keydown","keyup"]}onDomEvent(e){this.fire(e.type,e,{keyCode:e.keyCode,altKey:e.altKey,ctrlKey:e.ctrlKey,shiftKey:e.shiftKey,metaKey:e.metaKey,get keystroke(){return On(this)}})}}var ns=function(){return k.a.Date.now()},rs=/\s/;var ss=function(e){for(var t=e.length;t--&&rs.test(e.charAt(t)););return t},as=/^\s+/;var ls=function(e){return e?e.slice(0,ss(e)+1).replace(as,""):e},cs=/^[-+]0x[0-9a-f]+$/i,ds=/^0b[01]+$/i,hs=/^0o[0-7]+$/i,us=parseInt;var ms=function(e){if("number"==typeof e)return e;if(bo(e))return NaN;if(w(e)){var t="function"==typeof e.valueOf?e.valueOf():e;e=w(t)?t+"":t}if("string"!=typeof e)return 0===e?e:+e;e=ls(e);var i=ds.test(e);return i||hs.test(e)?us(e.slice(2),i?2:8):cs.test(e)?NaN:+e},gs=Math.max,fs=Math.min;var ps=function(e,t,i){var o,n,r,s,a,l,c=0,d=!1,h=!1,u=!0;if("function"!=typeof e)throw new TypeError("Expected a function");function m(t){var i=o,r=n;return o=n=void 0,c=t,s=e.apply(r,i)}function g(e){return c=e,a=setTimeout(p,t),d?m(e):s}function f(e){var i=e-l;return void 0===l||i>=t||i<0||h&&e-c>=r}function p(){var e=ns();if(f(e))return b(e);a=setTimeout(p,function(e){var i=t-(e-l);return h?fs(i,r-(e-c)):i}(e))}function b(e){return a=void 0,u&&o?m(e):(o=n=void 0,s)}function k(){var e=ns(),i=f(e);if(o=arguments,n=this,l=e,i){if(void 0===a)return g(l);if(h)return 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mn(t.getRanges(),{backward:t.isBackward,fake:!1});e!=Vn.arrowleft&&e!=Vn.arrowup||i.setTo(i.getFirstPosition()),e!=Vn.arrowright&&e!=Vn.arrowdown||i.setTo(i.getLastPosition());const o={oldSelection:t,newSelection:i,domSelection:null};this.document.fire("selectionChange",o),this._fireSelectionChangeDoneDebounced(o)}}class ws extends Mr{constructor(e){super(e),this.mutationObserver=e.getObserver(es),this.selection=this.document.selection,this.domConverter=e.domConverter,this._documents=new WeakSet,this._fireSelectionChangeDoneDebounced=ps(e=>this.document.fire("selectionChangeDone",e),200),this._clearInfiniteLoopInterval=setInterval(()=>this._clearInfiniteLoop(),1e3),this._loopbackCounter=0}observe(e){const t=e.ownerDocument;this._documents.has(t)||(this.listenTo(t,"selectionchange",(e,i)=>{this._handleSelectionChange(i,t)}),this._documents.add(t))}destroy(){super.destroy(),clearInterval(this._clearInfiniteLoopInterval),this._fireSelectionChangeDoneDebounced.cancel()}_handleSelectionChange(e,t){if(!this.isEnabled)return;const i=t.defaultView.getSelection();if(this.checkShouldIgnoreEventFromTarget(i.anchorNode))return;this.mutationObserver.flush();const o=this.domConverter.domSelectionToView(i);if(0!=o.rangeCount){if(this.view.hasDomSelection=!0,!(this.selection.isEqual(o)&&this.domConverter.isDomSelectionCorrect(i)||++this._loopbackCounter>60))if(this.selection.isSimilar(o))this.view.forceRender();else{const e={oldSelection:this.selection,newSelection:o,domSelection:i};this.document.fire("selectionChange",e),this._fireSelectionChangeDoneDebounced(e)}}else this.view.hasDomSelection=!1}_clearInfiniteLoop(){this._loopbackCounter=0}}class ks extends is{constructor(e){super(e),this.domEventType=["focus","blur"],this.useCapture=!0;const t=this.document;t.on("focus",()=>{t.isFocused=!0,this._renderTimeoutId=setTimeout(()=>e.forceRender(),50)}),t.on("blur",(i,o)=>{const n=t.selection.editableElement;null!==n&&n!==o.target||(t.isFocused=!1,e.forceRender())})}onDomEvent(e){this.fire(e.type,e)}destroy(){this._renderTimeoutId&&clearTimeout(this._renderTimeoutId),super.destroy()}}class _s extends is{constructor(e){super(e),this.domEventType=["compositionstart","compositionupdate","compositionend"];const t=this.document;t.on("compositionstart",()=>{t.isComposing=!0}),t.on("compositionend",()=>{t.isComposing=!1})}onDomEvent(e){this.fire(e.type,e)}}class vs extends is{constructor(e){super(e),this.domEventType=["beforeinput"]}onDomEvent(e){this.fire(e.type,e)}}var ys=function(e){return"string"==typeof e||!ve(e)&&fe(e)&&"[object String]"==S(e)};function xs(e,t,i={},o=[]){const n=i&&i.xmlns,r=n?e.createElementNS(n,t):e.createElement(t);for(const e in i)r.setAttribute(e,i[e]);!ys(o)&&Xi(o)||(o=[o]);for(let t of o)ys(t)&&(t=e.createTextNode(t)),r.appendChild(t);return r}function Cs(e){return"[object Range]"==Object.prototype.toString.apply(e)}function As(e){const t=e.ownerDocument.defaultView.getComputedStyle(e);return{top:parseInt(t.borderTopWidth,10),right:parseInt(t.borderRightWidth,10),bottom:parseInt(t.borderBottomWidth,10),left:parseInt(t.borderLeftWidth,10)}}const Ts=["top","right","bottom","left","width","height"];class Es{constructor(e){const t=Cs(e);if(Object.defineProperty(this,"_source",{value:e._source||e,writable:!0,enumerable:!1}),Gi(e)||t)if(t){const t=Es.getDomRangeRects(e);Ps(this,Es.getBoundingRect(t))}else Ps(this,e.getBoundingClientRect());else if(Ir(e)){const{innerWidth:t,innerHeight:i}=e;Ps(this,{top:0,right:t,bottom:i,left:0,width:t,height:i})}else Ps(this,e)}clone(){return new Es(this)}moveTo(e,t){return this.top=t,this.right=e+this.width,this.bottom=t+this.height,this.left=e,this}moveBy(e,t){return this.top+=t,this.right+=e,this.left+=e,this.bottom+=t,this}getIntersection(e){const t={top:Math.max(this.top,e.top),right:Math.min(this.right,e.right),bottom:Math.min(this.bottom,e.bottom),left:Math.max(this.left,e.left)};return t.width=t.right-t.left,t.height=t.bottom-t.top,t.width<0||t.height<0?null:new Es(t)}getIntersectionArea(e){const t=this.getIntersection(e);return t?t.getArea():0}getArea(){return this.width*this.height}getVisible(){const e=this._source;let t=this.clone();if(!Ss(e)){let i=e.parentNode||e.commonAncestorContainer;for(;i&&!Ss(i);){const e=new Es(i),o=t.getIntersection(e);if(!o)return null;o.getArea(){for(const t of e){const e=Rs._getElementCallbacks(t.target);if(e)for(const i of e)i(t)}})}}Rs._observerInstance=null,Rs._elementCallbacks=null;class Is{constructor(e){this._callback=e,this._elements=new Set,this._previousRects=new Map,this._periodicCheckTimeout=null}observe(e){this._elements.add(e),this._checkElementRectsAndExecuteCallback(),1===this._elements.size&&this._startPeriodicCheck()}unobserve(e){this._elements.delete(e),this._previousRects.delete(e),this._elements.size||this._stopPeriodicCheck()}_startPeriodicCheck(){const e=()=>{this._checkElementRectsAndExecuteCallback(),this._periodicCheckTimeout=setTimeout(e,100)};this.listenTo(vr.window,"resize",()=>{this._checkElementRectsAndExecuteCallback()}),this._periodicCheckTimeout=setTimeout(e,100)}_stopPeriodicCheck(){clearTimeout(this._periodicCheckTimeout),this.stopListening(),this._previousRects.clear()}_checkElementRectsAndExecuteCallback(){const e=[];for(const t of this._elements)this._hasRectChanged(t)&&e.push({target:t,contentRect:this._previousRects.get(t)});e.length&&this._callback(e)}_hasRectChanged(e){if(!e.ownerDocument.body.contains(e))return!1;const t=new Es(e),i=this._previousRects.get(e),o=!i||!i.isEqual(t);return this._previousRects.set(e,t),o}}function Vs(e,t){e instanceof HTMLTextAreaElement&&(e.value=t),e.innerHTML=t}function zs(e){return t=>t+e}function Os(e){const t=e.next();return t.done?null:t.value}Ye(Is,Vr);class Ms{constructor(){this.set("isFocused",!1),this.set("focusedElement",null),this._elements=new Set,this._nextEventLoopTimeout=null}add(e){if(this._elements.has(e))throw new l.a("focustracker-add-element-already-exist",this);this.listenTo(e,"focus",()=>this._focus(e),{useCapture:!0}),this.listenTo(e,"blur",()=>this._blur(),{useCapture:!0}),this._elements.add(e)}remove(e){e===this.focusedElement&&this._blur(e),this._elements.has(e)&&(this.stopListening(e),this._elements.delete(e))}destroy(){this.stopListening()}_focus(e){clearTimeout(this._nextEventLoopTimeout),this.focusedElement=e,this.isFocused=!0}_blur(){clearTimeout(this._nextEventLoopTimeout),this._nextEventLoopTimeout=setTimeout(()=>{this.focusedElement=null,this.isFocused=!1},0)}}Ye(Ms,Vr),Ye(Ms,qe);class Ns{constructor(){this._listener=Object.create(Vr)}listenTo(e){this._listener.listenTo(e,"keydown",(e,t)=>{this._listener.fire("_keydown:"+On(t),t)})}set(e,t,i={}){const o=Mn(e),n=i.priority;this._listener.listenTo(this._listener,"_keydown:"+o,(e,i)=>{t(i,()=>{i.preventDefault(),i.stopPropagation(),e.stop()}),e.return=!0},{priority:n})}press(e){return!!this._listener.fire("_keydown:"+On(e),e)}destroy(){this._listener.stopListening()}}class Bs extends Mr{constructor(e){super(e),this.document.on("keydown",(e,t)=>{if(this.isEnabled&&((i=t.keyCode)==Vn.arrowright||i==Vn.arrowleft||i==Vn.arrowup||i==Vn.arrowdown)){const i=new fn(this.document,"arrowKey",this.document.selection.getFirstRange());this.document.fire(i,t),i.stop.called&&e.stop()}var i})}observe(){}}function Fs({target:e,viewportOffset:t=0}){const i=$s(e);let o=i,n=null;for(;o;){let r;r=Us(o==i?e:n),Ls(r,()=>Ks(e,o));const s=Ks(e,o);if(Ds(o,s,t),o.parent!=o){if(n=o.frameElement,o=o.parent,!n)return}else o=null}}function Ds(e,t,i){const o=t.clone().moveBy(0,i),n=t.clone().moveBy(0,-i),r=new Es(e).excludeScrollbarsAndBorders();if(![n,o].every(e=>r.contains(e))){let{scrollX:s,scrollY:a}=e;js(n,r)?a-=r.top-t.top+i:Hs(o,r)&&(a+=t.bottom-r.bottom+i),Ws(t,r)?s-=r.left-t.left+i:qs(t,r)&&(s+=t.right-r.right+i),e.scrollTo(s,a)}}function Ls(e,t){const i=$s(e);let o,n;for(;e!=i.document.body;)n=t(),o=new Es(e).excludeScrollbarsAndBorders(),o.contains(n)||(js(n,o)?e.scrollTop-=o.top-n.top:Hs(n,o)&&(e.scrollTop+=n.bottom-o.bottom),Ws(n,o)?e.scrollLeft-=o.left-n.left:qs(n,o)&&(e.scrollLeft+=n.right-o.right)),e=e.parentNode}function Hs(e,t){return e.bottom>t.bottom}function js(e,t){return e.topt.right}function $s(e){return Cs(e)?e.startContainer.ownerDocument.defaultView:e.ownerDocument.defaultView}function Us(e){if(Cs(e)){let t=e.commonAncestorContainer;return tr(t)&&(t=t.parentNode),t}return e.parentNode}function Ks(e,t){const i=$s(e),o=new Es(e);if(i===t)return o;{let e=i;for(;e!=t;){const t=e.frameElement,i=new Es(t).excludeScrollbarsAndBorders();o.moveBy(i.left,i.top),e=e.parent}}return o}Object.assign({},{scrollViewportToShowTarget:Fs,scrollAncestorsToShowTarget:function(e){Ls(Us(e),()=>new Es(e))}});class Gs{constructor(e){this.document=new yn(e),this.domConverter=new Er(this.document),this.domRoots=new Map,this.set("isRenderingInProgress",!1),this.set("hasDomSelection",!1),this._renderer=new br(this.domConverter,this.document.selection),this._renderer.bind("isFocused").to(this.document),this._initialDomRootAttributes=new WeakMap,this._observers=new Map,this._ongoingChange=!1,this._postFixersInProgress=!1,this._renderingDisabled=!1,this._hasChangedSinceTheLastRendering=!1,this._writer=new 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n=()=>{this._writer.setAttribute("contenteditable",!i.isReadOnly,i),i.isReadOnly?this._writer.addClass("ck-read-only",i):this._writer.removeClass("ck-read-only",i)};n(),this.domRoots.set(t,e),this.domConverter.bindElements(e,i),this._renderer.markToSync("children",i),this._renderer.markToSync("attributes",i),this._renderer.domDocuments.add(e.ownerDocument),i.on("change:children",(e,t)=>this._renderer.markToSync("children",t)),i.on("change:attributes",(e,t)=>this._renderer.markToSync("attributes",t)),i.on("change:text",(e,t)=>this._renderer.markToSync("text",t)),i.on("change:isReadOnly",()=>this.change(n)),i.on("change",()=>{this._hasChangedSinceTheLastRendering=!0});for(const i of this._observers.values())i.observe(e,t)}detachDomRoot(e){const t=this.domRoots.get(e);Array.from(t.attributes).forEach(({name:e})=>t.removeAttribute(e));const i=this._initialDomRootAttributes.get(t);for(const e in i)t.setAttribute(e,i[e]);this.domRoots.delete(e),this.domConverter.unbindDomElement(t)}getDomRoot(e="main"){return this.domRoots.get(e)}addObserver(e){let t=this._observers.get(e);if(t)return t;t=new e(this),this._observers.set(e,t);for(const[e,i]of this.domRoots)t.observe(i,e);return t.enable(),t}getObserver(e){return this._observers.get(e)}disableObservers(){for(const e of this._observers.values())e.disable()}enableObservers(){for(const e of this._observers.values())e.enable()}scrollToTheSelection(){const e=this.document.selection.getFirstRange();e&&Fs({target:this.domConverter.viewRangeToDom(e),viewportOffset:20})}focus(){if(!this.document.isFocused){const e=this.document.selection.editableElement;e&&(this.domConverter.focus(e),this.forceRender())}}change(e){if(this.isRenderingInProgress||this._postFixersInProgress)throw new l.a("cannot-change-view-tree",this);try{if(this._ongoingChange)return e(this._writer);this._ongoingChange=!0;const t=e(this._writer);return this._ongoingChange=!1,!this._renderingDisabled&&this._hasChangedSinceTheLastRendering&&(this._postFixersInProgress=!0,this.document._callPostFixers(this._writer),this._postFixersInProgress=!1,this.fire("render")),t}catch(e){l.a.rethrowUnexpectedError(e,this)}}forceRender(){this._hasChangedSinceTheLastRendering=!0,this.change(()=>{})}destroy(){for(const e of this._observers.values())e.destroy();this.document.destroy(),this.stopListening()}createPositionAt(e,t){return cn._createAt(e,t)}createPositionAfter(e){return cn._createAfter(e)}createPositionBefore(e){return cn._createBefore(e)}createRange(e,t){return new dn(e,t)}createRangeOn(e){return dn._createOn(e)}createRangeIn(e){return dn._createIn(e)}createSelection(e,t,i){return new mn(e,t,i)}_disableRendering(e){this._renderingDisabled=e,0==e&&this.change(()=>{})}_render(){this.isRenderingInProgress=!0,this.disableObservers(),this._renderer.render(),this.enableObservers(),this.isRenderingInProgress=!1}}Ye(Gs,qe);class Js{constructor(e){this.parent=null,this._attrs=go(e)}get index(){let e;if(!this.parent)return null;if(null===(e=this.parent.getChildIndex(this)))throw new l.a("model-node-not-found-in-parent",this);return e}get startOffset(){let e;if(!this.parent)return null;if(null===(e=this.parent.getChildStartOffset(this)))throw new l.a("model-node-not-found-in-parent",this);return e}get offsetSize(){return 1}get endOffset(){return this.parent?this.startOffset+this.offsetSize:null}get nextSibling(){const e=this.index;return null!==e&&this.parent.getChild(e+1)||null}get previousSibling(){const e=this.index;return null!==e&&this.parent.getChild(e-1)||null}get root(){let e=this;for(;e.parent;)e=e.parent;return e}isAttached(){return this.root.is("rootElement")}getPath(){const e=[];let t=this;for(;t.parent;)e.unshift(t.startOffset),t=t.parent;return e}getAncestors(e={includeSelf:!1,parentFirst:!1}){const t=[];let i=e.includeSelf?this:this.parent;for(;i;)t[e.parentFirst?"push":"unshift"](i),i=i.parent;return t}getCommonAncestor(e,t={}){const i=this.getAncestors(t),o=e.getAncestors(t);let n=0;for(;i[n]==o[n]&&i[n];)n++;return 0===n?null:i[n-1]}isBefore(e){if(this==e)return!1;if(this.root!==e.root)return!1;const t=this.getPath(),i=e.getPath(),o=lo(t,i);switch(o){case"prefix":return!0;case"extension":return!1;default:return t[o](e[t[0]]=t[1],e),{})),e}is(e){return"node"===e||"model:node"===e}_clone(){return new Js(this._attrs)}_remove(){this.parent._removeChildren(this.index)}_setAttribute(e,t){this._attrs.set(e,t)}_setAttributesTo(e){this._attrs=go(e)}_removeAttribute(e){return this._attrs.delete(e)}_clearAttributes(){this._attrs.clear()}}class Ys extends Js{constructor(e,t){super(t),this._data=e||""}get offsetSize(){return this.data.length}get data(){return this._data}is(e){return"$text"===e||"model:$text"===e||"text"===e||"model:text"===e||"node"===e||"model:node"===e}toJSON(){const e=super.toJSON();return e.data=this.data,e}_clone(){return new Ys(this.data,this.getAttributes())}static fromJSON(e){return new Ys(e.data,e.attributes)}}class Qs{constructor(e,t,i){if(this.textNode=e,t<0||t>e.offsetSize)throw new l.a("model-textproxy-wrong-offsetintext",this);if(i<0||t+i>e.offsetSize)throw new l.a("model-textproxy-wrong-length",this);this.data=e.data.substring(t,t+i),this.offsetInText=t}get startOffset(){return null!==this.textNode.startOffset?this.textNode.startOffset+this.offsetInText:null}get offsetSize(){return this.data.length}get endOffset(){return null!==this.startOffset?this.startOffset+this.offsetSize:null}get isPartial(){return this.offsetSize!==this.textNode.offsetSize}get parent(){return this.textNode.parent}get root(){return this.textNode.root}is(e){return"$textProxy"===e||"model:$textProxy"===e||"textProxy"===e||"model:textProxy"===e}getPath(){const e=this.textNode.getPath();return e.length>0&&(e[e.length-1]+=this.offsetInText),e}getAncestors(e={includeSelf:!1,parentFirst:!1}){const t=[];let i=e.includeSelf?this:this.parent;for(;i;)t[e.parentFirst?"push":"unshift"](i),i=i.parent;return t}hasAttribute(e){return this.textNode.hasAttribute(e)}getAttribute(e){return this.textNode.getAttribute(e)}getAttributes(){return this.textNode.getAttributes()}getAttributeKeys(){return this.textNode.getAttributeKeys()}}class Xs{constructor(e){this._nodes=[],e&&this._insertNodes(0,e)}[Symbol.iterator](){return this._nodes[Symbol.iterator]()}get length(){return this._nodes.length}get maxOffset(){return this._nodes.reduce((e,t)=>e+t.offsetSize,0)}getNode(e){return this._nodes[e]||null}getNodeIndex(e){const t=this._nodes.indexOf(e);return-1==t?null:t}getNodeStartOffset(e){const t=this.getNodeIndex(e);return null===t?null:this._nodes.slice(0,t).reduce((e,t)=>e+t.offsetSize,0)}indexToOffset(e){if(e==this._nodes.length)return this.maxOffset;const t=this._nodes[e];if(!t)throw new l.a("model-nodelist-index-out-of-bounds",this);return this.getNodeStartOffset(t)}offsetToIndex(e){let t=0;for(const i of this._nodes){if(e>=t&&ee.toJSON())}}class Zs extends Js{constructor(e,t,i){super(t),this.name=e,this._children=new Xs,i&&this._insertChild(0,i)}get childCount(){return this._children.length}get maxOffset(){return this._children.maxOffset}get isEmpty(){return 0===this.childCount}is(e,t=null){return t?t===this.name&&("element"===e||"model:element"===e):"element"===e||"model:element"===e||"node"===e||"model:node"===e}getChild(e){return this._children.getNode(e)}getChildren(){return this._children[Symbol.iterator]()}getChildIndex(e){return this._children.getNodeIndex(e)}getChildStartOffset(e){return this._children.getNodeStartOffset(e)}offsetToIndex(e){return this._children.offsetToIndex(e)}getNodeByPath(e){let t=this;for(const i of e)t=t.getChild(t.offsetToIndex(i));return t}findAncestor(e,t={includeSelf:!1}){let i=t.includeSelf?this:this.parent;for(;i;){if(i.name===e)return i;i=i.parent}return null}toJSON(){const e=super.toJSON();if(e.name=this.name,this._children.length>0){e.children=[];for(const t of this._children)e.children.push(t.toJSON())}return e}_clone(e=!1){const t=e?Array.from(this._children).map(e=>e._clone(!0)):null;return new Zs(this.name,this.getAttributes(),t)}_appendChild(e){this._insertChild(this.childCount,e)}_insertChild(e,t){const i=function(e){if("string"==typeof e)return[new Ys(e)];Xi(e)||(e=[e]);return Array.from(e).map(e=>"string"==typeof e?new Ys(e):e instanceof Qs?new Ys(e.data,e.getAttributes()):e)}(t);for(const e of i)null!==e.parent&&e._remove(),e.parent=this;this._children._insertNodes(e,i)}_removeChildren(e,t=1){const i=this._children._removeNodes(e,t);for(const e of i)e.parent=null;return i}static fromJSON(e){let t=null;if(e.children){t=[];for(const i of e.children)i.name?t.push(Zs.fromJSON(i)):t.push(Ys.fromJSON(i))}return new Zs(e.name,e.attributes,t)}}class ea{constructor(e={}){if(!e.boundaries&&!e.startPosition)throw new l.a("model-tree-walker-no-start-position",null);const t=e.direction||"forward";if("forward"!=t&&"backward"!=t)throw new l.a("model-tree-walker-unknown-direction",e,{direction:t});this.direction=t,this.boundaries=e.boundaries||null,e.startPosition?this.position=e.startPosition.clone():this.position=ia._createAt(this.boundaries["backward"==this.direction?"end":"start"]),this.position.stickiness="toNone",this.singleCharacters=!!e.singleCharacters,this.shallow=!!e.shallow,this.ignoreElementEnd=!!e.ignoreElementEnd,this._boundaryStartParent=this.boundaries?this.boundaries.start.parent:null,this._boundaryEndParent=this.boundaries?this.boundaries.end.parent:null,this._visitedParent=this.position.parent}[Symbol.iterator](){return this}skip(e){let t,i,o,n;do{o=this.position,n=this._visitedParent,({done:t,value:i}=this.next())}while(!t&&e(i));t||(this.position=o,this._visitedParent=n)}next(){return"forward"==this.direction?this._next():this._previous()}_next(){const e=this.position,t=this.position.clone(),i=this._visitedParent;if(null===i.parent&&t.offset===i.maxOffset)return{done:!0};if(i===this._boundaryEndParent&&t.offset==this.boundaries.end.offset)return{done:!0};const o=t.parent,n=oa(t,o),r=n||na(t,o,n);if(r instanceof Zs)return this.shallow?t.offset++:(t.path.push(0),this._visitedParent=r),this.position=t,ta("elementStart",r,e,t,1);if(r instanceof Ys){let o;if(this.singleCharacters)o=1;else{let e=r.endOffset;this._boundaryEndParent==i&&this.boundaries.end.offsete&&(e=this.boundaries.start.offset),o=t.offset-e}const n=t.offset-r.startOffset,s=new Qs(r,n-o,o);return t.offset-=o,this.position=t,ta("text",s,e,t,o)}return t.path.pop(),this.position=t,this._visitedParent=i.parent,ta("elementStart",i,e,t,1)}}function ta(e,t,i,o,n){return{done:!1,value:{type:e,item:t,previousPosition:i,nextPosition:o,length:n}}}class ia{constructor(e,t,i="toNone"){if(!e.is("element")&&!e.is("documentFragment"))throw new l.a("model-position-root-invalid",e);if(!(t instanceof Array)||0===t.length)throw new l.a("model-position-path-incorrect-format",e,{path:t});e.is("rootElement")?t=t.slice():(t=[...e.getPath(),...t],e=e.root),this.root=e,this.path=t,this.stickiness=i}get offset(){return this.path[this.path.length-1]}set offset(e){this.path[this.path.length-1]=e}get parent(){let e=this.root;for(let t=0;ti.path.length){if(t.offset!==o.maxOffset)return!1;t.path=t.path.slice(0,-1),o=o.parent,t.offset++}else{if(0!==i.offset)return!1;i.path=i.path.slice(0,-1)}}}is(e){return"position"===e||"model:position"===e}hasSameParentAs(e){if(this.root!==e.root)return!1;return"same"==lo(this.getParentPath(),e.getParentPath())}getTransformedByOperation(e){let t;switch(e.type){case"insert":t=this._getTransformedByInsertOperation(e);break;case"move":case"remove":case"reinsert":t=this._getTransformedByMoveOperation(e);break;case"split":t=this._getTransformedBySplitOperation(e);break;case"merge":t=this._getTransformedByMergeOperation(e);break;default:t=ia._createAt(this)}return t}_getTransformedByInsertOperation(e){return this._getTransformedByInsertion(e.position,e.howMany)}_getTransformedByMoveOperation(e){return this._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany)}_getTransformedBySplitOperation(e){const t=e.movedRange;return t.containsPosition(this)||t.start.isEqual(this)&&"toNext"==this.stickiness?this._getCombined(e.splitPosition,e.moveTargetPosition):e.graveyardPosition?this._getTransformedByMove(e.graveyardPosition,e.insertionPosition,1):this._getTransformedByInsertion(e.insertionPosition,1)}_getTransformedByMergeOperation(e){const t=e.movedRange;let i;return t.containsPosition(this)||t.start.isEqual(this)?(i=this._getCombined(e.sourcePosition,e.targetPosition),e.sourcePosition.isBefore(e.targetPosition)&&(i=i._getTransformedByDeletion(e.deletionPosition,1))):i=this.isEqual(e.deletionPosition)?ia._createAt(e.deletionPosition):this._getTransformedByMove(e.deletionPosition,e.graveyardPosition,1),i}_getTransformedByDeletion(e,t){const i=ia._createAt(this);if(this.root!=e.root)return i;if("same"==lo(e.getParentPath(),this.getParentPath())){if(e.offsetthis.offset)return null;i.offset-=t}}else if("prefix"==lo(e.getParentPath(),this.getParentPath())){const o=e.path.length-1;if(e.offset<=this.path[o]){if(e.offset+t>this.path[o])return null;i.path[o]-=t}}return i}_getTransformedByInsertion(e,t){const i=ia._createAt(this);if(this.root!=e.root)return i;if("same"==lo(e.getParentPath(),this.getParentPath()))(e.offsett+1;){const t=o.maxOffset-i.offset;0!==t&&e.push(new sa(i,i.getShiftedBy(t))),i.path=i.path.slice(0,-1),i.offset++,o=o.parent}for(;i.path.length<=this.end.path.length;){const t=this.end.path[i.path.length-1],o=t-i.offset;0!==o&&e.push(new sa(i,i.getShiftedBy(o))),i.offset=t,i.path.push(0)}return e}getWalker(e={}){return e.boundaries=this,new ea(e)}*getItems(e={}){e.boundaries=this,e.ignoreElementEnd=!0;const t=new ea(e);for(const e of t)yield e.item}*getPositions(e={}){e.boundaries=this;const t=new ea(e);yield t.position;for(const e of t)yield e.nextPosition}getTransformedByOperation(e){switch(e.type){case"insert":return this._getTransformedByInsertOperation(e);case"move":case"remove":case"reinsert":return this._getTransformedByMoveOperation(e);case"split":return[this._getTransformedBySplitOperation(e)];case"merge":return[this._getTransformedByMergeOperation(e)]}return[new sa(this.start,this.end)]}getTransformedByOperations(e){const t=[new sa(this.start,this.end)];for(const i of e)for(let e=0;e0?new this(i,o):new this(o,i)}static _createIn(e){return new this(ia._createAt(e,0),ia._createAt(e,e.maxOffset))}static _createOn(e){return this._createFromPositionAndShift(ia._createBefore(e),e.offsetSize)}static _createFromRanges(e){if(0===e.length)throw new l.a("range-create-from-ranges-empty-array",null);if(1==e.length)return e[0].clone();const t=e[0];e.sort((e,t)=>e.start.isAfter(t.start)?1:-1);const i=e.indexOf(t),o=new this(t.start,t.end);if(i>0)for(let t=i-1;e[t].end.isEqual(o.start);t++)o.start=ia._createAt(e[t].start);for(let t=i+1;t{if(t.viewPosition)return;const i=this._modelToViewMapping.get(t.modelPosition.parent);t.viewPosition=this.findPositionIn(i,t.modelPosition.offset)},{priority:"low"}),this.on("viewToModelPosition",(e,t)=>{if(t.modelPosition)return;const i=this.findMappedViewAncestor(t.viewPosition),o=this._viewToModelMapping.get(i),n=this._toModelOffset(t.viewPosition.parent,t.viewPosition.offset,i);t.modelPosition=ia._createAt(o,n)},{priority:"low"})}bindElements(e,t){this._modelToViewMapping.set(e,t),this._viewToModelMapping.set(t,e)}unbindViewElement(e){const t=this.toModelElement(e);if(this._viewToModelMapping.delete(e),this._elementToMarkerNames.has(e))for(const t of this._elementToMarkerNames.get(e))this._unboundMarkerNames.add(t);this._modelToViewMapping.get(t)==e&&this._modelToViewMapping.delete(t)}unbindModelElement(e){const t=this.toViewElement(e);this._modelToViewMapping.delete(e),this._viewToModelMapping.get(t)==e&&this._viewToModelMapping.delete(t)}bindElementToMarker(e,t){const i=this._markerNameToElements.get(t)||new Set;i.add(e);const o=this._elementToMarkerNames.get(e)||new Set;o.add(t),this._markerNameToElements.set(t,i),this._elementToMarkerNames.set(e,o)}unbindElementFromMarkerName(e,t){const i=this._markerNameToElements.get(t);i&&(i.delete(e),0==i.size&&this._markerNameToElements.delete(t));const o=this._elementToMarkerNames.get(e);o&&(o.delete(t),0==o.size&&this._elementToMarkerNames.delete(e))}flushUnboundMarkerNames(){const e=Array.from(this._unboundMarkerNames);return this._unboundMarkerNames.clear(),e}clearBindings(){this._modelToViewMapping=new WeakMap,this._viewToModelMapping=new WeakMap,this._markerNameToElements=new Map,this._elementToMarkerNames=new Map,this._unboundMarkerNames=new Set}toModelElement(e){return this._viewToModelMapping.get(e)}toViewElement(e){return this._modelToViewMapping.get(e)}toModelRange(e){return new sa(this.toModelPosition(e.start),this.toModelPosition(e.end))}toViewRange(e){return new dn(this.toViewPosition(e.start),this.toViewPosition(e.end))}toModelPosition(e){const t={viewPosition:e,mapper:this};return this.fire("viewToModelPosition",t),t.modelPosition}toViewPosition(e,t={isPhantom:!1}){const i={modelPosition:e,mapper:this,isPhantom:t.isPhantom};return this.fire("modelToViewPosition",i),i.viewPosition}markerNameToElements(e){const t=this._markerNameToElements.get(e);if(!t)return null;const i=new Set;for(const e of t)if(e.is("attributeElement"))for(const t of e.getElementsWithSameId())i.add(t);else i.add(e);return i}registerViewToModelLength(e,t){this._viewToModelLengthCallbacks.set(e,t)}findMappedViewAncestor(e){let t=e.parent;for(;!this._viewToModelMapping.has(t);)t=t.parent;return t}_toModelOffset(e,t,i){if(i!=e){return this._toModelOffset(e.parent,e.index,i)+this._toModelOffset(e,t,e)}if(e.is("$text"))return t;let o=0;for(let i=0;i1?t[0]+":"+t[1]:t[0]}class da{constructor(e){this.conversionApi=Object.assign({dispatcher:this},e),this._reconversionEventsMapping=new Map}convertChanges(e,t,i){for(const t of e.getMarkersToRemove())this.convertMarkerRemove(t.name,t.range,i);const o=this._mapChangesWithAutomaticReconversion(e);for(const e of o)"insert"===e.type?this.convertInsert(sa._createFromPositionAndShift(e.position,e.length),i):"remove"===e.type?this.convertRemove(e.position,e.length,e.name,i):"reconvert"===e.type?this.reconvertElement(e.element,i):this.convertAttribute(e.range,e.attributeKey,e.attributeOldValue,e.attributeNewValue,i);for(const e of this.conversionApi.mapper.flushUnboundMarkerNames()){const o=t.get(e).getRange();this.convertMarkerRemove(e,o,i),this.convertMarkerAdd(e,o,i)}for(const t of e.getMarkersToAdd())this.convertMarkerAdd(t.name,t.range,i)}convertInsert(e,t){this.conversionApi.writer=t,this.conversionApi.consumable=this._createInsertConsumable(e);for(const t of Array.from(e).map(ua))this._convertInsertWithAttributes(t);this._clearConversionApi()}convertRemove(e,t,i,o){this.conversionApi.writer=o,this.fire("remove:"+i,{position:e,length:t},this.conversionApi),this._clearConversionApi()}convertAttribute(e,t,i,o,n){this.conversionApi.writer=n,this.conversionApi.consumable=this._createConsumableForRange(e,"attribute:"+t);for(const n of e){const e={item:n.item,range:sa._createFromPositionAndShift(n.previousPosition,n.length),attributeKey:t,attributeOldValue:i,attributeNewValue:o};this._testAndFire("attribute:"+t,e)}this._clearConversionApi()}reconvertElement(e,t){const i=sa._createOn(e);this.conversionApi.writer=t,this.conversionApi.consumable=this._createInsertConsumable(i);const o=this.conversionApi.mapper,n=o.toViewElement(e);t.remove(n),this._convertInsertWithAttributes({item:e,range:i});const r=o.toViewElement(e);for(const i of sa._createIn(e)){const{item:e}=i,n=ma(e,o);n?n.root!==r.root&&t.move(t.createRangeOn(n),o.toViewPosition(ia._createBefore(e))):this._convertInsertWithAttributes(ua(i))}o.unbindViewElement(n),this._clearConversionApi()}convertSelection(e,t,i){const o=Array.from(t.getMarkersAtPosition(e.getFirstPosition()));if(this.conversionApi.writer=i,this.conversionApi.consumable=this._createSelectionConsumable(e,o),this.fire("selection",{selection:e},this.conversionApi),e.isCollapsed){for(const t of o){const i=t.getRange();if(!ha(e.getFirstPosition(),t,this.conversionApi.mapper))continue;const o={item:e,markerName:t.name,markerRange:i};this.conversionApi.consumable.test(e,"addMarker:"+t.name)&&this.fire("addMarker:"+t.name,o,this.conversionApi)}for(const t of e.getAttributeKeys()){const i={item:e,range:e.getFirstRange(),attributeKey:t,attributeOldValue:null,attributeNewValue:e.getAttribute(t)};this.conversionApi.consumable.test(e,"attribute:"+i.attributeKey)&&this.fire("attribute:"+i.attributeKey+":$text",i,this.conversionApi)}this._clearConversionApi()}}convertMarkerAdd(e,t,i){if("$graveyard"==t.root.rootName)return;this.conversionApi.writer=i;const o="addMarker:"+e,n=new la;if(n.add(t,o),this.conversionApi.consumable=n,this.fire(o,{markerName:e,markerRange:t},this.conversionApi),n.test(t,o)){this.conversionApi.consumable=this._createConsumableForRange(t,o);for(const i of t.getItems()){if(!this.conversionApi.consumable.test(i,o))continue;const n={item:i,range:sa._createOn(i),markerName:e,markerRange:t};this.fire(o,n,this.conversionApi)}this._clearConversionApi()}}convertMarkerRemove(e,t,i){"$graveyard"!=t.root.rootName&&(this.conversionApi.writer=i,this.fire("removeMarker:"+e,{markerName:e,markerRange:t},this.conversionApi),this._clearConversionApi())}_mapReconversionTriggerEvent(e,t){this._reconversionEventsMapping.set(t,e)}_createInsertConsumable(e){const t=new la;for(const i of e){const e=i.item;t.add(e,"insert");for(const i of e.getAttributeKeys())t.add(e,"attribute:"+i)}return t}_createConsumableForRange(e,t){const i=new la;for(const o of e.getItems())i.add(o,t);return i}_createSelectionConsumable(e,t){const i=new la;i.add(e,"selection");for(const o of t)i.add(e,"addMarker:"+o.name);for(const t of e.getAttributeKeys())i.add(e,"attribute:"+t);return i}_testAndFire(e,t){this.conversionApi.consumable.test(t.item,e)&&this.fire(function(e,t){const i=t.item.name||"$text";return`${e}:${i}`}(e,t),t,this.conversionApi)}_clearConversionApi(){delete this.conversionApi.writer,delete this.conversionApi.consumable}_convertInsertWithAttributes(e){this._testAndFire("insert",e);for(const t of e.item.getAttributeKeys())e.attributeKey=t,e.attributeOldValue=null,e.attributeNewValue=e.item.getAttribute(t),this._testAndFire("attribute:"+t,e)}_mapChangesWithAutomaticReconversion(e){const t=new Set,i=[];for(const o of e.getChanges()){const e=o.position||o.range.start,n=e.parent;if(oa(e,n)){i.push(o);continue}const r="attribute"===o.type?na(e,n,null):n;if(r.is("$text")){i.push(o);continue}let s;if(s="attribute"===o.type?`attribute:${o.attributeKey}:${r.name}`:`${o.type}:${o.name}`,this._isReconvertTriggerEvent(s,r.name)){if(t.has(r))continue;t.add(r),i.push({type:"reconvert",element:r})}else i.push(o)}return i}_isReconvertTriggerEvent(e,t){return this._reconversionEventsMapping.get(e)===t}}function ha(e,t,i){const o=t.getRange(),n=Array.from(e.getAncestors());n.shift(),n.reverse();return!n.some(e=>{if(o.containsItem(e)){return!!i.toViewElement(e).getCustomProperty("addHighlight")}})}function ua(e){return{item:e.item,range:sa._createFromPositionAndShift(e.previousPosition,e.length)}}function ma(e,t){if(e.is("textProxy")){const i=t.toViewPosition(ia._createBefore(e)).parent;return i.is("$text")?i:null}return t.toViewElement(e)}Ye(da,h);class ga{constructor(e,t,i){this._lastRangeBackward=!1,this._ranges=[],this._attrs=new Map,e&&this.setTo(e,t,i)}get anchor(){if(this._ranges.length>0){const e=this._ranges[this._ranges.length-1];return this._lastRangeBackward?e.end:e.start}return null}get focus(){if(this._ranges.length>0){const e=this._ranges[this._ranges.length-1];return this._lastRangeBackward?e.start:e.end}return null}get isCollapsed(){return 1===this._ranges.length&&this._ranges[0].isCollapsed}get rangeCount(){return this._ranges.length}get isBackward(){return!this.isCollapsed&&this._lastRangeBackward}isEqual(e){if(this.rangeCount!=e.rangeCount)return!1;if(0===this.rangeCount)return!0;if(!this.anchor.isEqual(e.anchor)||!this.focus.isEqual(e.focus))return!1;for(const t of this._ranges){let i=!1;for(const o of e._ranges)if(t.isEqual(o)){i=!0;break}if(!i)return!1}return!0}*getRanges(){for(const e of this._ranges)yield new sa(e.start,e.end)}getFirstRange(){let e=null;for(const t of this._ranges)e&&!t.start.isBefore(e.start)||(e=t);return e?new sa(e.start,e.end):null}getLastRange(){let e=null;for(const t of this._ranges)e&&!t.end.isAfter(e.end)||(e=t);return e?new sa(e.start,e.end):null}getFirstPosition(){const e=this.getFirstRange();return e?e.start.clone():null}getLastPosition(){const e=this.getLastRange();return e?e.end.clone():null}setTo(e,t,i){if(null===e)this._setRanges([]);else if(e instanceof ga)this._setRanges(e.getRanges(),e.isBackward);else if(e&&"function"==typeof e.getRanges)this._setRanges(e.getRanges(),e.isBackward);else if(e instanceof sa)this._setRanges([e],!!t&&!!t.backward);else if(e instanceof ia)this._setRanges([new sa(e)]);else if(e instanceof Js){const o=!!i&&!!i.backward;let n;if("in"==t)n=sa._createIn(e);else if("on"==t)n=sa._createOn(e);else{if(void 0===t)throw new l.a("model-selection-setto-required-second-parameter",[this,e]);n=new sa(ia._createAt(e,t))}this._setRanges([n],o)}else{if(!Xi(e))throw new l.a("model-selection-setto-not-selectable",[this,e]);this._setRanges(e,t&&!!t.backward)}}_setRanges(e,t=!1){const i=(e=Array.from(e)).some(t=>{if(!(t instanceof sa))throw new l.a("model-selection-set-ranges-not-range",[this,e]);return this._ranges.every(e=>!e.isEqual(t))});if(e.length!==this._ranges.length||i){this._removeAllRanges();for(const t of e)this._pushRange(t);this._lastRangeBackward=!!t,this.fire("change:range",{directChange:!0})}}setFocus(e,t){if(null===this.anchor)throw new l.a("model-selection-setfocus-no-ranges",[this,e]);const i=ia._createAt(e,t);if("same"==i.compareWith(this.focus))return;const o=this.anchor;this._ranges.length&&this._popRange(),"before"==i.compareWith(o)?(this._pushRange(new sa(i,o)),this._lastRangeBackward=!0):(this._pushRange(new sa(o,i)),this._lastRangeBackward=!1),this.fire("change:range",{directChange:!0})}getAttribute(e){return this._attrs.get(e)}getAttributes(){return this._attrs.entries()}getAttributeKeys(){return this._attrs.keys()}hasAttribute(e){return this._attrs.has(e)}removeAttribute(e){this.hasAttribute(e)&&(this._attrs.delete(e),this.fire("change:attribute",{attributeKeys:[e],directChange:!0}))}setAttribute(e,t){this.getAttribute(e)!==t&&(this._attrs.set(e,t),this.fire("change:attribute",{attributeKeys:[e],directChange:!0}))}getSelectedElement(){return 1!==this.rangeCount?null:this.getFirstRange().getContainedElement()}is(e){return"selection"===e||"model:selection"===e}*getSelectedBlocks(){const e=new WeakSet;for(const t of this.getRanges()){const i=ba(t.start,e);i&&wa(i,t)&&(yield i);for(const i of t.getWalker()){const o=i.item;"elementEnd"==i.type&&pa(o,e,t)&&(yield o)}const o=ba(t.end,e);o&&!t.end.isTouching(ia._createAt(o,0))&&wa(o,t)&&(yield o)}}containsEntireContent(e=this.anchor.root){const t=ia._createAt(e,0),i=ia._createAt(e,"end");return t.isTouching(this.getFirstPosition())&&i.isTouching(this.getLastPosition())}_pushRange(e){this._checkRange(e),this._ranges.push(new sa(e.start,e.end))}_checkRange(e){for(let t=0;t0;)this._popRange()}_popRange(){this._ranges.pop()}}function fa(e,t){return!t.has(e)&&(t.add(e),e.root.document.model.schema.isBlock(e)&&e.parent)}function pa(e,t,i){return fa(e,t)&&wa(e,i)}function ba(e,t){const i=e.parent.root.document.model.schema,o=e.parent.getAncestors({parentFirst:!0,includeSelf:!0});let n=!1;const r=o.find(e=>!n&&(n=i.isLimit(e),!n&&fa(e,t)));return o.forEach(e=>t.add(e)),r}function wa(e,t){const i=function(e){const t=e.root.document.model.schema;let i=e.parent;for(;i;){if(t.isBlock(i))return i;i=i.parent}}(e);if(!i)return!0;return!t.containsRange(sa._createOn(i),!0)}Ye(ga,h);class ka extends sa{constructor(e,t){super(e,t),_a.call(this)}detach(){this.stopListening()}is(e){return"liveRange"===e||"model:liveRange"===e||"range"==e||"model:range"===e}toRange(){return new sa(this.start,this.end)}static fromRange(e){return new ka(e.start,e.end)}}function _a(){this.listenTo(this.root.document.model,"applyOperation",(e,t)=>{const i=t[0];i.isDocumentOperation&&va.call(this,i)},{priority:"low"})}function va(e){const t=this.getTransformedByOperation(e),i=sa._createFromRanges(t),o=!i.isEqual(this),n=function(e,t){switch(t.type){case"insert":return e.containsPosition(t.position);case"move":case"remove":case"reinsert":case"merge":return e.containsPosition(t.sourcePosition)||e.start.isEqual(t.sourcePosition)||e.containsPosition(t.targetPosition);case"split":return e.containsPosition(t.splitPosition)||e.containsPosition(t.insertionPosition)}return!1}(this,e);let r=null;if(o){"$graveyard"==i.root.rootName&&(r="remove"==e.type?e.sourcePosition:e.deletionPosition);const t=this.toRange();this.start=i.start,this.end=i.end,this.fire("change:range",t,{deletionPosition:r})}else n&&this.fire("change:content",this.toRange(),{deletionPosition:r})}Ye(ka,h);class ya{constructor(e){this._selection=new xa(e),this._selection.delegate("change:range").to(this),this._selection.delegate("change:attribute").to(this),this._selection.delegate("change:marker").to(this)}get isCollapsed(){return this._selection.isCollapsed}get anchor(){return this._selection.anchor}get focus(){return this._selection.focus}get rangeCount(){return this._selection.rangeCount}get hasOwnRange(){return this._selection.hasOwnRange}get isBackward(){return this._selection.isBackward}get isGravityOverridden(){return this._selection.isGravityOverridden}get markers(){return this._selection.markers}get _ranges(){return this._selection._ranges}getRanges(){return this._selection.getRanges()}getFirstPosition(){return this._selection.getFirstPosition()}getLastPosition(){return this._selection.getLastPosition()}getFirstRange(){return this._selection.getFirstRange()}getLastRange(){return this._selection.getLastRange()}getSelectedBlocks(){return this._selection.getSelectedBlocks()}getSelectedElement(){return this._selection.getSelectedElement()}containsEntireContent(e){return this._selection.containsEntireContent(e)}destroy(){this._selection.destroy()}getAttributeKeys(){return this._selection.getAttributeKeys()}getAttributes(){return this._selection.getAttributes()}getAttribute(e){return this._selection.getAttribute(e)}hasAttribute(e){return this._selection.hasAttribute(e)}refresh(){this._selection._updateMarkers(),this._selection._updateAttributes(!1)}observeMarkers(e){this._selection.observeMarkers(e)}is(e){return"selection"===e||"model:selection"==e||"documentSelection"==e||"model:documentSelection"==e}_setFocus(e,t){this._selection.setFocus(e,t)}_setTo(e,t,i){this._selection.setTo(e,t,i)}_setAttribute(e,t){this._selection.setAttribute(e,t)}_removeAttribute(e){this._selection.removeAttribute(e)}_getStoredAttributes(){return this._selection._getStoredAttributes()}_overrideGravity(){return this._selection.overrideGravity()}_restoreGravity(e){this._selection.restoreGravity(e)}static _getStoreAttributeKey(e){return"selection:"+e}static _isStoreAttributeKey(e){return e.startsWith("selection:")}}Ye(ya,h);class xa extends ga{constructor(e){super(),this.markers=new Zi({idProperty:"name"}),this._model=e.model,this._document=e,this._attributePriority=new Map,this._selectionRestorePosition=null,this._hasChangedRange=!1,this._overriddenGravityRegister=new Set,this._observedMarkers=new Set,this.listenTo(this._model,"applyOperation",(e,t)=>{const i=t[0];i.isDocumentOperation&&"marker"!=i.type&&"rename"!=i.type&&"noop"!=i.type&&(0==this._ranges.length&&this._selectionRestorePosition&&this._fixGraveyardSelection(this._selectionRestorePosition),this._selectionRestorePosition=null,this._hasChangedRange&&(this._hasChangedRange=!1,this.fire("change:range",{directChange:!1})))},{priority:"lowest"}),this.on("change:range",()=>{for(const e of this.getRanges())if(!this._document._validateSelectionRange(e))throw new l.a("document-selection-wrong-position",this,{range:e})}),this.listenTo(this._model.markers,"update",(e,t,i,o)=>{this._updateMarker(t,o)}),this.listenTo(this._document,"change",(e,t)=>{!function(e,t){const i=e.document.differ;for(const o of i.getChanges()){if("insert"!=o.type)continue;const i=o.position.parent;o.length===i.maxOffset&&e.enqueueChange(t,e=>{const t=Array.from(i.getAttributeKeys()).filter(e=>e.startsWith("selection:"));for(const o of t)e.removeAttribute(o,i)})}}(this._model,t)})}get isCollapsed(){return 0===this._ranges.length?this._document._getDefaultRange().isCollapsed:super.isCollapsed}get anchor(){return super.anchor||this._document._getDefaultRange().start}get focus(){return super.focus||this._document._getDefaultRange().end}get rangeCount(){return this._ranges.length?this._ranges.length:1}get hasOwnRange(){return this._ranges.length>0}get isGravityOverridden(){return!!this._overriddenGravityRegister.size}destroy(){for(let e=0;e{if(this._hasChangedRange=!0,t.root==this._document.graveyard){this._selectionRestorePosition=o.deletionPosition;const e=this._ranges.indexOf(t);this._ranges.splice(e,1),t.detach()}}),t}_updateMarkers(){if(!this._observedMarkers.size)return;const e=[];let t=!1;for(const t of this._model.markers){const i=t.name.split(":",1)[0];if(!this._observedMarkers.has(i))continue;const o=t.getRange();for(const i of this.getRanges())o.containsRange(i,!i.isCollapsed)&&e.push(t)}const i=Array.from(this.markers);for(const i of e)this.markers.has(i)||(this.markers.add(i),t=!0);for(const i of Array.from(this.markers))e.includes(i)||(this.markers.remove(i),t=!0);t&&this.fire("change:marker",{oldMarkers:i,directChange:!1})}_updateMarker(e,t){const i=e.name.split(":",1)[0];if(!this._observedMarkers.has(i))return;let o=!1;const n=Array.from(this.markers),r=this.markers.has(e);if(t){let i=!1;for(const e of this.getRanges())if(t.containsRange(e,!e.isCollapsed)){i=!0;break}i&&!r?(this.markers.add(e),o=!0):!i&&r&&(this.markers.remove(e),o=!0)}else r&&(this.markers.remove(e),o=!0);o&&this.fire("change:marker",{oldMarkers:n,directChange:!1})}_updateAttributes(e){const t=go(this._getSurroundingAttributes()),i=go(this.getAttributes());if(e)this._attributePriority=new Map,this._attrs=new Map;else for(const[e,t]of this._attributePriority)"low"==t&&(this._attrs.delete(e),this._attributePriority.delete(e));this._setAttributesTo(t);const o=[];for(const[e,t]of this.getAttributes())i.has(e)&&i.get(e)===t||o.push(e);for(const[e]of i)this.hasAttribute(e)||o.push(e);o.length>0&&this.fire("change:attribute",{attributeKeys:o,directChange:!1})}_setAttribute(e,t,i=!0){const o=i?"normal":"low";if("low"==o&&"normal"==this._attributePriority.get(e))return!1;return super.getAttribute(e)!==t&&(this._attrs.set(e,t),this._attributePriority.set(e,o),!0)}_removeAttribute(e,t=!0){const i=t?"normal":"low";return("low"!=i||"normal"!=this._attributePriority.get(e))&&(this._attributePriority.set(e,i),!!super.hasAttribute(e)&&(this._attrs.delete(e),!0))}_setAttributesTo(e){const t=new Set;for(const[t,i]of this.getAttributes())e.get(t)!==i&&this._removeAttribute(t,!1);for(const[i,o]of e){this._setAttribute(i,o,!1)&&t.add(i)}return t}*_getStoredAttributes(){const e=this.getFirstPosition().parent;if(this.isCollapsed&&e.isEmpty)for(const t of e.getAttributeKeys())if(t.startsWith("selection:")){const i=t.substr("selection:".length);yield[i,e.getAttribute(t)]}}_getSurroundingAttributes(){const e=this.getFirstPosition(),t=this._model.schema;let i=null;if(this.isCollapsed){const o=e.textNode?e.textNode:e.nodeBefore,n=e.textNode?e.textNode:e.nodeAfter;if(this.isGravityOverridden||(i=Ca(o)),i||(i=Ca(n)),!this.isGravityOverridden&&!i){let e=o;for(;e&&!t.isInline(e)&&!i;)e=e.previousSibling,i=Ca(e)}if(!i){let e=n;for(;e&&!t.isInline(e)&&!i;)e=e.nextSibling,i=Ca(e)}i||(i=this._getStoredAttributes())}else{const e=this.getFirstRange();for(const o of e){if(o.item.is("element")&&t.isObject(o.item))break;if("text"==o.type){i=o.item.getAttributes();break}}}return i}_fixGraveyardSelection(e){const t=this._model.schema.getNearestSelectionRange(e);t&&this._pushRange(t)}}function Ca(e){return e instanceof Qs||e instanceof Ys?e.getAttributes():null}class Aa{constructor(e){this._dispatchers=e}add(e){for(const t of this._dispatchers)e(t);return this}}var Ta=function(e){return Ui(e,5)};class Ea extends Aa{elementToElement(e){return this.add(function(e){return(e=Ta(e)).view=Ra(e.view,"container"),t=>{var i;if(t.on("insert:"+e.model,(i=e.view,(e,t,o)=>{const n=i(t.item,o);if(!n)return;if(!o.consumable.consume(t.item,"insert"))return;const r=o.mapper.toViewPosition(t.range.start);o.mapper.bindElements(t.item,n),o.writer.insert(r,n)}),{priority:e.converterPriority||"normal"}),e.triggerBy){if(e.triggerBy.attributes)for(const i of e.triggerBy.attributes)t._mapReconversionTriggerEvent(e.model,`attribute:${i}:${e.model}`);if(e.triggerBy.children)for(const i of e.triggerBy.children)t._mapReconversionTriggerEvent(e.model,"insert:"+i),t._mapReconversionTriggerEvent(e.model,"remove:"+i)}}}(e))}attributeToElement(e){return this.add(function(e){e=Ta(e);let t="attribute:"+(e.model.key?e.model.key:e.model);e.model.name&&(t+=":"+e.model.name);if(e.model.values)for(const t of e.model.values)e.view[t]=Ra(e.view[t],"attribute");else e.view=Ra(e.view,"attribute");const i=Ia(e);return o=>{o.on(t,function(e){return(t,i,o)=>{const n=e(i.attributeOldValue,o),r=e(i.attributeNewValue,o);if(!n&&!r)return;if(!o.consumable.consume(i.item,t.name))return;const s=o.writer,a=s.document.selection;if(i.item instanceof ga||i.item instanceof ya)s.wrap(a.getFirstRange(),r);else{let e=o.mapper.toViewRange(i.range);null!==i.attributeOldValue&&n&&(e=s.unwrap(e,n)),null!==i.attributeNewValue&&r&&s.wrap(e,r)}}}(i),{priority:e.converterPriority||"normal"})}}(e))}attributeToAttribute(e){return this.add(function(e){e=Ta(e);let t="attribute:"+(e.model.key?e.model.key:e.model);e.model.name&&(t+=":"+e.model.name);if(e.model.values)for(const t of e.model.values)e.view[t]=Va(e.view[t]);else e.view=Va(e.view);const i=Ia(e);return o=>{var n;o.on(t,(n=i,(e,t,i)=>{const o=n(t.attributeOldValue,i),r=n(t.attributeNewValue,i);if(!o&&!r)return;if(!i.consumable.consume(t.item,e.name))return;const s=i.mapper.toViewElement(t.item),a=i.writer;if(!s)throw new l.a("conversion-attribute-to-attribute-on-text",[t,i]);if(null!==t.attributeOldValue&&o)if("class"==o.key){const e=to(o.value);for(const t of e)a.removeClass(t,s)}else if("style"==o.key){const e=Object.keys(o.value);for(const t of e)a.removeStyle(t,s)}else a.removeAttribute(o.key,s);if(null!==t.attributeNewValue&&r)if("class"==r.key){const e=to(r.value);for(const t of e)a.addClass(t,s)}else if("style"==r.key){const e=Object.keys(r.value);for(const t of e)a.setStyle(t,r.value[t],s)}else a.setAttribute(r.key,r.value,s)}),{priority:e.converterPriority||"normal"})}}(e))}markerToElement(e){return this.add(function(e){return(e=Ta(e)).view=Ra(e.view,"ui"),t=>{var i;t.on("addMarker:"+e.model,(i=e.view,(e,t,o)=>{t.isOpening=!0;const n=i(t,o);t.isOpening=!1;const r=i(t,o);if(!n||!r)return;const s=t.markerRange;if(s.isCollapsed&&!o.consumable.consume(s,e.name))return;for(const t of s)if(!o.consumable.consume(t.item,e.name))return;const a=o.mapper,l=o.writer;l.insert(a.toViewPosition(s.start),n),o.mapper.bindElementToMarker(n,t.markerName),s.isCollapsed||(l.insert(a.toViewPosition(s.end),r),o.mapper.bindElementToMarker(r,t.markerName)),e.stop()}),{priority:e.converterPriority||"normal"}),t.on("removeMarker:"+e.model,(e.view,(e,t,i)=>{const o=i.mapper.markerNameToElements(t.markerName);if(o){for(const e of o)i.mapper.unbindElementFromMarkerName(e,t.markerName),i.writer.clear(i.writer.createRangeOn(e),e);i.writer.clearClonedElementsGroup(t.markerName),e.stop()}}),{priority:e.converterPriority||"normal"})}}(e))}markerToHighlight(e){return this.add(function(e){return t=>{var i;t.on("addMarker:"+e.model,(i=e.view,(e,t,o)=>{if(!t.item)return;if(!(t.item instanceof ga||t.item instanceof ya||t.item.is("$textProxy")))return;const n=za(i,t,o);if(!n)return;if(!o.consumable.consume(t.item,e.name))return;const r=o.writer,s=Pa(r,n),a=r.document.selection;if(t.item instanceof ga||t.item instanceof ya)r.wrap(a.getFirstRange(),s,a);else{const e=o.mapper.toViewRange(t.range),i=r.wrap(e,s);for(const e of i.getItems())if(e.is("attributeElement")&&e.isSimilar(s)){o.mapper.bindElementToMarker(e,t.markerName);break}}}),{priority:e.converterPriority||"normal"}),t.on("addMarker:"+e.model,function(e){return(t,i,o)=>{if(!i.item)return;if(!(i.item instanceof Zs))return;const n=za(e,i,o);if(!n)return;if(!o.consumable.test(i.item,t.name))return;const r=o.mapper.toViewElement(i.item);if(r&&r.getCustomProperty("addHighlight")){o.consumable.consume(i.item,t.name);for(const e of sa._createIn(i.item))o.consumable.consume(e.item,t.name);r.getCustomProperty("addHighlight")(r,n,o.writer),o.mapper.bindElementToMarker(r,i.markerName)}}}(e.view),{priority:e.converterPriority||"normal"}),t.on("removeMarker:"+e.model,function(e){return(t,i,o)=>{if(i.markerRange.isCollapsed)return;const n=za(e,i,o);if(!n)return;const r=Pa(o.writer,n),s=o.mapper.markerNameToElements(i.markerName);if(s){for(const e of s)o.mapper.unbindElementFromMarkerName(e,i.markerName),e.is("attributeElement")?o.writer.unwrap(o.writer.createRangeOn(e),r):e.getCustomProperty("removeHighlight")(e,n.id,o.writer);o.writer.clearClonedElementsGroup(i.markerName),t.stop()}}}(e.view),{priority:e.converterPriority||"normal"})}}(e))}markerToData(e){return this.add(function(e){const t=(e=Ta(e)).model;e.view||(e.view=i=>({group:t,name:i.substr(e.model.length+1)}));return i=>{var o;i.on("addMarker:"+t,(o=e.view,(e,t,i)=>{const n=o(t.markerName,i);if(!n)return;const r=t.markerRange;i.consumable.consume(r,e.name)&&(Sa(r,!1,i,t,n),Sa(r,!0,i,t,n),e.stop())}),{priority:e.converterPriority||"normal"}),i.on("removeMarker:"+t,function(e){return(t,i,o)=>{const n=e(i.markerName,o);if(!n)return;const r=o.mapper.markerNameToElements(i.markerName);if(r){for(const e of r)o.mapper.unbindElementFromMarkerName(e,i.markerName),e.is("containerElement")?(s(`data-${n.group}-start-before`,e),s(`data-${n.group}-start-after`,e),s(`data-${n.group}-end-before`,e),s(`data-${n.group}-end-after`,e)):o.writer.clear(o.writer.createRangeOn(e),e);o.writer.clearClonedElementsGroup(i.markerName),t.stop()}function s(e,t){if(t.hasAttribute(e)){const i=new Set(t.getAttribute(e).split(","));i.delete(n.name),0==i.size?o.writer.removeAttribute(e,t):o.writer.setAttribute(e,Array.from(i).join(","),t)}}}}(e.view),{priority:e.converterPriority||"normal"})}}(e))}}function Pa(e,t){const i=e.createAttributeElement("span",t.attributes);return t.classes&&i._addClass(t.classes),t.priority&&(i._priority=t.priority),i._id=t.id,i}function Sa(e,t,i,o,n){const r=t?e.start:e.end;if(i.schema.checkChild(r,"$text")){!function(e,t,i,o,n){const r=`${n.group}-${t?"start":"end"}`,s=n.name?{name:n.name}:null,a=i.writer.createUIElement(r,s);i.writer.insert(e,a),i.mapper.bindElementToMarker(a,o.markerName)}(i.mapper.toViewPosition(r),t,i,o,n)}else{let e,s;t&&r.nodeAfter||!t&&!r.nodeBefore?(e=r.nodeAfter,s=!0):(e=r.nodeBefore,s=!1);!function(e,t,i,o,n,r){const s=`data-${r.group}-${t?"start":"end"}-${i?"before":"after"}`,a=e.hasAttribute(s)?e.getAttribute(s).split(","):[];a.unshift(r.name),o.writer.setAttribute(s,a.join(","),e),o.mapper.bindElementToMarker(e,n.markerName)}(i.mapper.toViewElement(e),t,s,i,o,n)}}function Ra(e,t){return"function"==typeof e?e:(i,o)=>function(e,t,i){"string"==typeof e&&(e={name:e});let o;const n=t.writer,r=Object.assign({},e.attributes);if("container"==i)o=n.createContainerElement(e.name,r);else if("attribute"==i){const t={priority:e.priority||xn.DEFAULT_PRIORITY};o=n.createAttributeElement(e.name,r,t)}else o=n.createUIElement(e.name,r);if(e.styles){const t=Object.keys(e.styles);for(const i of t)n.setStyle(i,e.styles[i],o)}if(e.classes){const t=e.classes;if("string"==typeof t)n.addClass(t,o);else for(const e of t)n.addClass(e,o)}return o}(e,o,t)}function Ia(e){return e.model.values?(t,i)=>{const o=e.view[t];return o?o(t,i):null}:e.view}function Va(e){return"string"==typeof e?t=>({key:e,value:t}):"object"==typeof e?e.value?()=>e:t=>({key:e.key,value:t}):e}function za(e,t,i){const o="function"==typeof e?e(t,i):e;return o?(o.priority||(o.priority=10),o.id||(o.id=t.markerName),o):null}function Oa(e){const{schema:t,document:i}=e.model;for(const o of i.getRootNames()){const n=i.getRoot(o);if(n.isEmpty&&!t.checkChild(n,"$text")&&t.checkChild(n,"paragraph"))return e.insertElement("paragraph",n),!0}return!1}function Ma(e,t,i){const o=i.createContext(e);return!!i.checkChild(o,"paragraph")&&!!i.checkChild(o.push("paragraph"),t)}function Na(e,t){const i=t.createElement("paragraph");return t.insert(i,e),t.createPositionAt(i,0)}class Ba extends Aa{elementToElement(e){return this.add(Fa(e))}elementToAttribute(e){return this.add(function(e){Ha(e=Ta(e));const t=ja(e,!1),i=Da(e.view),o=i?"element:"+i:"element";return i=>{i.on(o,t,{priority:e.converterPriority||"low"})}}(e))}attributeToAttribute(e){return this.add(function(e){e=Ta(e);let t=null;("string"==typeof e.view||e.view.key)&&(t=function(e){"string"==typeof e.view&&(e.view={key:e.view});const t=e.view.key;let i;if("class"==t||"style"==t){i={["class"==t?"classes":"styles"]:e.view.value}}else{const o=void 0===e.view.value?/[\s\S]*/:e.view.value;i={attributes:{[t]:o}}}e.view.name&&(i.name=e.view.name);return e.view=i,t}(e));Ha(e,t);const i=ja(e,!0);return t=>{t.on("element",i,{priority:e.converterPriority||"low"})}}(e))}elementToMarker(e){return Object(l.b)("upcast-helpers-element-to-marker-deprecated"),this.add(function(e){return function(e){const t=e.model;e.model=(e,i)=>{const o="string"==typeof t?t:t(e,i);return i.writer.createElement("$marker",{"data-name":o})}}(e=Ta(e)),Fa(e)}(e))}dataToMarker(e){return this.add(function(e){(e=Ta(e)).model||(e.model=t=>t?e.view+":"+t:e.view);const t=La(Wa(e,"start")),i=La(Wa(e,"end"));return o=>{o.on("element:"+e.view+"-start",t,{priority:e.converterPriority||"normal"}),o.on("element:"+e.view+"-end",i,{priority:e.converterPriority||"normal"});const n=a.get("low"),r=a.get("highest"),s=a.get(e.converterPriority)/r;o.on("element",function(e){return(t,i,o)=>{const n="data-"+e.view;function r(t,n){for(const r of n){const n=e.model(r,o),s=o.writer.createElement("$marker",{"data-name":n});o.writer.insert(s,t),i.modelCursor.isEqual(t)?i.modelCursor=i.modelCursor.getShiftedBy(1):i.modelCursor=i.modelCursor._getTransformedByInsertion(t,1),i.modelRange=i.modelRange._getTransformedByInsertion(t,1)[0]}}i.modelRange||(i=Object.assign(i,o.convertChildren(i.viewItem,i.modelCursor))),o.consumable.consume(i.viewItem,{attributes:n+"-end-after"})&&r(i.modelRange.end,i.viewItem.getAttribute(n+"-end-after").split(",")),o.consumable.consume(i.viewItem,{attributes:n+"-start-after"})&&r(i.modelRange.end,i.viewItem.getAttribute(n+"-start-after").split(",")),o.consumable.consume(i.viewItem,{attributes:n+"-end-before"})&&r(i.modelRange.start,i.viewItem.getAttribute(n+"-end-before").split(",")),o.consumable.consume(i.viewItem,{attributes:n+"-start-before"})&&r(i.modelRange.start,i.viewItem.getAttribute(n+"-start-before").split(","))}}(e),{priority:n+s})}}(e))}}function Fa(e){const t=La(e=Ta(e)),i=Da(e.view),o=i?"element:"+i:"element";return i=>{i.on(o,t,{priority:e.converterPriority||"normal"})}}function Da(e){return"string"==typeof e?e:"object"==typeof e&&"string"==typeof e.name?e.name:null}function La(e){const t=new fo(e.view);return(i,o,n)=>{const r=t.match(o.viewItem);if(!r)return;const s=r.match;if(s.name=!0,!n.consumable.test(o.viewItem,s))return;const a=function(e,t,i){return e instanceof Function?e(t,i):i.writer.createElement(e)}(e.model,o.viewItem,n);a&&n.safeInsert(a,o.modelCursor)&&(n.consumable.consume(o.viewItem,s),n.convertChildren(o.viewItem,a),n.updateConversionResult(a,o))}}function Ha(e,t=null){const i=null===t||(e=>e.getAttribute(t)),o="object"!=typeof e.model?e.model:e.model.key,n="object"!=typeof e.model||void 0===e.model.value?i:e.model.value;e.model={key:o,value:n}}function ja(e,t){const i=new fo(e.view);return(o,n,r)=>{const s=i.match(n.viewItem);if(!s)return;const a=e.model.key,l="function"==typeof e.model.value?e.model.value(n.viewItem,r):e.model.value;if(null===l)return;if(!function(e,t){const i="function"==typeof e?e(t):e;if("object"==typeof i&&!Da(i))return!1;return!i.classes&&!i.attributes&&!i.styles}(e.view,n.viewItem)?delete s.match.name:s.match.name=!0,!r.consumable.test(n.viewItem,s.match))return;n.modelRange||(n=Object.assign(n,r.convertChildren(n.viewItem,n.modelCursor)));(function(e,t,i,o){let n=!1;for(const r of Array.from(e.getItems({shallow:i})))o.schema.checkAttribute(r,t.key)&&(n=!0,r.hasAttribute(t.key)||o.writer.setAttribute(t.key,t.value,r));return n})(n.modelRange,{key:a,value:l},t,r)&&r.consumable.consume(n.viewItem,s.match)}}function Wa(e,t){const i={};return i.view=e.view+"-"+t,i.model=(t,i)=>{const o=t.getAttribute("name"),n=e.model(o,i);return i.writer.createElement("$marker",{"data-name":n})},i}class qa{constructor(e,t){this.model=e,this.view=new Gs(t),this.mapper=new aa,this.downcastDispatcher=new da({mapper:this.mapper,schema:e.schema});const i=this.model.document,o=i.selection,n=this.model.markers;this.listenTo(this.model,"_beforeChanges",()=>{this.view._disableRendering(!0)},{priority:"highest"}),this.listenTo(this.model,"_afterChanges",()=>{this.view._disableRendering(!1)},{priority:"lowest"}),this.listenTo(i,"change",()=>{this.view.change(e=>{this.downcastDispatcher.convertChanges(i.differ,n,e),this.downcastDispatcher.convertSelection(o,n,e)})},{priority:"low"}),this.listenTo(this.view.document,"selectionChange",function(e,t){return(i,o)=>{const n=o.newSelection,r=[];for(const e of n.getRanges())r.push(t.toModelRange(e));const s=e.createSelection(r,{backward:n.isBackward});s.isEqual(e.document.selection)||e.change(e=>{e.setSelection(s)})}}(this.model,this.mapper)),this.downcastDispatcher.on("insert:$text",(e,t,i)=>{if(!i.consumable.consume(t.item,"insert"))return;const o=i.writer,n=i.mapper.toViewPosition(t.range.start),r=o.createText(t.item.data);o.insert(n,r)},{priority:"lowest"}),this.downcastDispatcher.on("remove",(e,t,i)=>{const o=i.mapper.toViewPosition(t.position),n=t.position.getShiftedBy(t.length),r=i.mapper.toViewPosition(n,{isPhantom:!0}),s=i.writer.createRange(o,r),a=i.writer.remove(s.getTrimmed());for(const e of i.writer.createRangeIn(a).getItems())i.mapper.unbindViewElement(e)},{priority:"low"}),this.downcastDispatcher.on("selection",(e,t,i)=>{const o=i.writer,n=o.document.selection;for(const e of n.getRanges())e.isCollapsed&&e.end.parent.isAttached()&&i.writer.mergeAttributes(e.start);o.setSelection(null)},{priority:"low"}),this.downcastDispatcher.on("selection",(e,t,i)=>{const o=t.selection;if(o.isCollapsed)return;if(!i.consumable.consume(o,"selection"))return;const n=[];for(const e of o.getRanges()){const t=i.mapper.toViewRange(e);n.push(t)}i.writer.setSelection(n,{backward:o.isBackward})},{priority:"low"}),this.downcastDispatcher.on("selection",(e,t,i)=>{const o=t.selection;if(!o.isCollapsed)return;if(!i.consumable.consume(o,"selection"))return;const n=i.writer,r=o.getFirstPosition(),s=i.mapper.toViewPosition(r),a=n.breakAttributes(s);n.setSelection(a)},{priority:"low"}),this.view.document.roots.bindTo(this.model.document.roots).using(e=>{if("$graveyard"==e.rootName)return null;const t=new an(this.view.document,e.name);return t.rootName=e.rootName,this.mapper.bindElements(e,t),t})}destroy(){this.view.destroy(),this.stopListening()}}Ye(qa,qe);class $a{constructor(){this._commands=new Map}add(e,t){this._commands.set(e,t)}get(e){return this._commands.get(e)}execute(e,...t){const i=this.get(e);if(!i)throw new l.a("commandcollection-command-not-found",this,{commandName:e});return i.execute(...t)}*names(){yield*this._commands.keys()}*commands(){yield*this._commands.values()}[Symbol.iterator](){return this._commands[Symbol.iterator]()}destroy(){for(const e of this.commands())e.destroy()}}class Ua{constructor(){this._consumables=new Map}add(e,t){let i;e.is("$text")||e.is("documentFragment")?this._consumables.set(e,!0):(this._consumables.has(e)?i=this._consumables.get(e):(i=new Ka(e),this._consumables.set(e,i)),i.add(t))}test(e,t){const i=this._consumables.get(e);return void 0===i?null:e.is("$text")||e.is("documentFragment")?i:i.test(t)}consume(e,t){return!!this.test(e,t)&&(e.is("$text")||e.is("documentFragment")?this._consumables.set(e,!1):this._consumables.get(e).consume(t),!0)}revert(e,t){const i=this._consumables.get(e);void 0!==i&&(e.is("$text")||e.is("documentFragment")?this._consumables.set(e,!0):i.revert(t))}static consumablesFromElement(e){const t={element:e,name:!0,attributes:[],classes:[],styles:[]},i=e.getAttributeKeys();for(const e of i)"style"!=e&&"class"!=e&&t.attributes.push(e);const o=e.getClassNames();for(const e of o)t.classes.push(e);const n=e.getStyleNames();for(const e of n)t.styles.push(e);return t}static createFrom(e,t){if(t||(t=new Ua(e)),e.is("$text"))return t.add(e),t;e.is("element")&&t.add(e,Ua.consumablesFromElement(e)),e.is("documentFragment")&&t.add(e);for(const i of e.getChildren())t=Ua.createFrom(i,t);return t}}class Ka{constructor(e){this.element=e,this._canConsumeName=null,this._consumables={attributes:new Map,styles:new Map,classes:new Map}}add(e){e.name&&(this._canConsumeName=!0);for(const t in this._consumables)t in e&&this._add(t,e[t])}test(e){if(e.name&&!this._canConsumeName)return this._canConsumeName;for(const t in this._consumables)if(t in e){const i=this._test(t,e[t]);if(!0!==i)return i}return!0}consume(e){e.name&&(this._canConsumeName=!1);for(const t in this._consumables)t in e&&this._consume(t,e[t])}revert(e){e.name&&(this._canConsumeName=!0);for(const t in this._consumables)t in e&&this._revert(t,e[t])}_add(e,t){const i=ve(t)?t:[t],o=this._consumables[e];for(const t of i){if("attributes"===e&&("class"===t||"style"===t))throw new l.a("viewconsumable-invalid-attribute",this);if(o.set(t,!0),"styles"===e)for(const e of this.element.document.stylesProcessor.getRelatedStyles(t))o.set(e,!0)}}_test(e,t){const i=ve(t)?t:[t],o=this._consumables[e];for(const t of i)if("attributes"!==e||"class"!==t&&"style"!==t){const e=o.get(t);if(void 0===e)return null;if(!e)return!1}else{const e="class"==t?"classes":"styles",i=this._test(e,[...this._consumables[e].keys()]);if(!0!==i)return i}return!0}_consume(e,t){const i=ve(t)?t:[t],o=this._consumables[e];for(const t of i)if("attributes"!==e||"class"!==t&&"style"!==t){if(o.set(t,!1),"styles"==e)for(const e of this.element.document.stylesProcessor.getRelatedStyles(t))o.set(e,!1)}else{const e="class"==t?"classes":"styles";this._consume(e,[...this._consumables[e].keys()])}}_revert(e,t){const i=ve(t)?t:[t],o=this._consumables[e];for(const t of i)if("attributes"!==e||"class"!==t&&"style"!==t){!1===o.get(t)&&o.set(t,!0)}else{const e="class"==t?"classes":"styles";this._revert(e,[...this._consumables[e].keys()])}}}class Ga{constructor(){this._sourceDefinitions={},this._attributeProperties={},this.decorate("checkChild"),this.decorate("checkAttribute"),this.on("checkAttribute",(e,t)=>{t[0]=new Ja(t[0])},{priority:"highest"}),this.on("checkChild",(e,t)=>{t[0]=new Ja(t[0]),t[1]=this.getDefinition(t[1])},{priority:"highest"})}register(e,t){if(this._sourceDefinitions[e])throw new l.a("schema-cannot-register-item-twice",this,{itemName:e});this._sourceDefinitions[e]=[Object.assign({},t)],this._clearCache()}extend(e,t){if(!this._sourceDefinitions[e])throw new l.a("schema-cannot-extend-missing-item",this,{itemName:e});this._sourceDefinitions[e].push(Object.assign({},t)),this._clearCache()}getDefinitions(){return this._compiledDefinitions||this._compile(),this._compiledDefinitions}getDefinition(e){let t;return t="string"==typeof e?e:e.is&&(e.is("$text")||e.is("$textProxy"))?"$text":e.name,this.getDefinitions()[t]}isRegistered(e){return!!this.getDefinition(e)}isBlock(e){const t=this.getDefinition(e);return!(!t||!t.isBlock)}isLimit(e){const t=this.getDefinition(e);return!!t&&!(!t.isLimit&&!t.isObject)}isObject(e){const t=this.getDefinition(e);return!!t&&!!(t.isObject||t.isLimit&&t.isSelectable&&t.isContent)}isInline(e){const t=this.getDefinition(e);return!(!t||!t.isInline)}isSelectable(e){const t=this.getDefinition(e);return!!t&&!(!t.isSelectable&&!t.isObject)}isContent(e){const t=this.getDefinition(e);return!!t&&!(!t.isContent&&!t.isObject)}checkChild(e,t){return!!t&&this._checkContextMatch(t,e)}checkAttribute(e,t){const i=this.getDefinition(e.last);return!!i&&i.allowAttributes.includes(t)}checkMerge(e,t=null){if(e instanceof ia){const t=e.nodeBefore,i=e.nodeAfter;if(!(t instanceof Zs))throw new l.a("schema-check-merge-no-element-before",this);if(!(i instanceof Zs))throw new l.a("schema-check-merge-no-element-after",this);return this.checkMerge(t,i)}for(const i of t.getChildren())if(!this.checkChild(e,i))return!1;return!0}addChildCheck(e){this.on("checkChild",(t,[i,o])=>{if(!o)return;const n=e(i,o);"boolean"==typeof n&&(t.stop(),t.return=n)},{priority:"high"})}addAttributeCheck(e){this.on("checkAttribute",(t,[i,o])=>{const n=e(i,o);"boolean"==typeof n&&(t.stop(),t.return=n)},{priority:"high"})}setAttributeProperties(e,t){this._attributeProperties[e]=Object.assign(this.getAttributeProperties(e),t)}getAttributeProperties(e){return this._attributeProperties[e]||{}}getLimitElement(e){let t;if(e instanceof ia)t=e.parent;else{t=(e instanceof sa?[e]:Array.from(e.getRanges())).reduce((e,t)=>{const i=t.getCommonAncestor();return e?e.getCommonAncestor(i,{includeSelf:!0}):i},null)}for(;!this.isLimit(t)&&t.parent;)t=t.parent;return t}checkAttributeInSelection(e,t){if(e.isCollapsed){const i=[...e.getFirstPosition().getAncestors(),new Ys("",e.getAttributes())];return this.checkAttribute(i,t)}{const i=e.getRanges();for(const e of i)for(const i of e)if(this.checkAttribute(i.item,t))return!0}return!1}*getValidRanges(e,t){e=function*(e){for(const t of e)yield*t.getMinimalFlatRanges()}(e);for(const i of e)yield*this._getValidRangesForRange(i,t)}getNearestSelectionRange(e,t="both"){if(this.checkChild(e,"$text"))return new sa(e);let i,o;const n=e.getAncestors().reverse().find(e=>this.isLimit(e))||e.root;"both"!=t&&"backward"!=t||(i=new ea({boundaries:sa._createIn(n),startPosition:e,direction:"backward"})),"both"!=t&&"forward"!=t||(o=new ea({boundaries:sa._createIn(n),startPosition:e}));for(const e of function*(e,t){let i=!1;for(;!i;){if(i=!0,e){const t=e.next();t.done||(i=!1,yield{walker:e,value:t.value})}if(t){const e=t.next();e.done||(i=!1,yield{walker:t,value:e.value})}}}(i,o)){const t=e.walker==i?"elementEnd":"elementStart",o=e.value;if(o.type==t&&this.isObject(o.item))return sa._createOn(o.item);if(this.checkChild(o.nextPosition,"$text"))return new sa(o.nextPosition)}return null}findAllowedParent(e,t){let i=e.parent;for(;i;){if(this.checkChild(i,t))return i;if(this.isLimit(i))return null;i=i.parent}return null}removeDisallowedAttributes(e,t){for(const i of e)if(i.is("$text"))sl(this,i,t);else{const e=sa._createIn(i).getPositions();for(const i of e){sl(this,i.nodeBefore||i.parent,t)}}}createContext(e){return new Ja(e)}_clearCache(){this._compiledDefinitions=null}_compile(){const e={},t=this._sourceDefinitions,i=Object.keys(t);for(const o of i)e[o]=Ya(t[o],o);for(const t of i)Qa(e,t);for(const t of i)Xa(e,t);for(const t of i)Za(e,t),el(e,t);for(const t of i)tl(e,t),il(e,t);this._compiledDefinitions=e}_checkContextMatch(e,t,i=t.length-1){const o=t.getItem(i);if(e.allowIn.includes(o.name)){if(0==i)return!0;{const e=this.getDefinition(o);return this._checkContextMatch(e,t,i-1)}}return!1}*_getValidRangesForRange(e,t){let i=e.start,o=e.start;for(const n of e.getItems({shallow:!0}))n.is("element")&&(yield*this._getValidRangesForRange(sa._createIn(n),t)),this.checkAttribute(n,t)||(i.isEqual(o)||(yield new sa(i,o)),i=ia._createAfter(n)),o=ia._createAfter(n);i.isEqual(o)||(yield new sa(i,o))}}Ye(Ga,qe);class Ja{constructor(e){if(e instanceof Ja)return e;"string"==typeof e?e=[e]:Array.isArray(e)||(e=e.getAncestors({includeSelf:!0})),this._items=e.map(rl)}get length(){return this._items.length}get last(){return this._items[this._items.length-1]}[Symbol.iterator](){return this._items[Symbol.iterator]()}push(e){const t=new Ja([e]);return t._items=[...this._items,...t._items],t}getItem(e){return this._items[e]}*getNames(){yield*this._items.map(e=>e.name)}endsWith(e){return Array.from(this.getNames()).join(" ").endsWith(e)}startsWith(e){return Array.from(this.getNames()).join(" ").startsWith(e)}}function Ya(e,t){const i={name:t,allowIn:[],allowContentOf:[],allowWhere:[],allowAttributes:[],allowAttributesOf:[],inheritTypesFrom:[]};return function(e,t){for(const i of e){const e=Object.keys(i).filter(e=>e.startsWith("is"));for(const o of e)t[o]=i[o]}}(e,i),ol(e,i,"allowIn"),ol(e,i,"allowContentOf"),ol(e,i,"allowWhere"),ol(e,i,"allowAttributes"),ol(e,i,"allowAttributesOf"),ol(e,i,"inheritTypesFrom"),function(e,t){for(const i of e){const e=i.inheritAllFrom;e&&(t.allowContentOf.push(e),t.allowWhere.push(e),t.allowAttributesOf.push(e),t.inheritTypesFrom.push(e))}}(e,i),i}function Qa(e,t){for(const i of e[t].allowContentOf)if(e[i]){nl(e,i).forEach(e=>{e.allowIn.push(t)})}delete e[t].allowContentOf}function Xa(e,t){for(const i of e[t].allowWhere){const o=e[i];if(o){const i=o.allowIn;e[t].allowIn.push(...i)}}delete e[t].allowWhere}function Za(e,t){for(const i of e[t].allowAttributesOf){const o=e[i];if(o){const i=o.allowAttributes;e[t].allowAttributes.push(...i)}}delete e[t].allowAttributesOf}function el(e,t){const i=e[t];for(const t of i.inheritTypesFrom){const o=e[t];if(o){const e=Object.keys(o).filter(e=>e.startsWith("is"));for(const t of e)t in i||(i[t]=o[t])}}delete i.inheritTypesFrom}function tl(e,t){const i=e[t],o=i.allowIn.filter(t=>e[t]);i.allowIn=Array.from(new Set(o))}function il(e,t){const i=e[t];i.allowAttributes=Array.from(new Set(i.allowAttributes))}function ol(e,t,i){for(const o of e)"string"==typeof o[i]?t[i].push(o[i]):Array.isArray(o[i])&&t[i].push(...o[i])}function nl(e,t){const i=e[t];return(o=e,Object.keys(o).map(e=>o[e])).filter(e=>e.allowIn.includes(i.name));var o}function rl(e){return"string"==typeof e||e.is("documentFragment")?{name:"string"==typeof e?e:"$documentFragment",*getAttributeKeys(){},getAttribute(){}}:{name:e.is("element")?e.name:"$text",*getAttributeKeys(){yield*e.getAttributeKeys()},getAttribute:t=>e.getAttribute(t)}}function sl(e,t,i){for(const o of t.getAttributeKeys())e.checkAttribute(t,o)||i.removeAttribute(o,t)}class al{constructor(e={}){this._splitParts=new Map,this._cursorParents=new Map,this._modelCursor=null,this.conversionApi=Object.assign({},e),this.conversionApi.convertItem=this._convertItem.bind(this),this.conversionApi.convertChildren=this._convertChildren.bind(this),this.conversionApi.safeInsert=this._safeInsert.bind(this),this.conversionApi.updateConversionResult=this._updateConversionResult.bind(this),this.conversionApi.splitToAllowedParent=this._splitToAllowedParent.bind(this),this.conversionApi.getSplitParts=this._getSplitParts.bind(this)}convert(e,t,i=["$root"]){this.fire("viewCleanup",e),this._modelCursor=function(e,t){let i;for(const o of new Ja(e)){const e={};for(const t of o.getAttributeKeys())e[t]=o.getAttribute(t);const n=t.createElement(o.name,e);i&&t.append(n,i),i=ia._createAt(n,0)}return i}(i,t),this.conversionApi.writer=t,this.conversionApi.consumable=Ua.createFrom(e),this.conversionApi.store={};const{modelRange:o}=this._convertItem(e,this._modelCursor),n=t.createDocumentFragment();if(o){this._removeEmptyElements();for(const e of Array.from(this._modelCursor.parent.getChildren()))t.append(e,n);n.markers=function(e,t){const i=new Set,o=new Map,n=sa._createIn(e).getItems();for(const e of n)"$marker"==e.name&&i.add(e);for(const e of i){const i=e.getAttribute("data-name"),n=t.createPositionBefore(e);o.has(i)?o.get(i).end=n.clone():o.set(i,new sa(n.clone())),t.remove(e)}return o}(n,t)}return this._modelCursor=null,this._splitParts.clear(),this._cursorParents.clear(),this.conversionApi.writer=null,this.conversionApi.store=null,n}_convertItem(e,t){const i=Object.assign({viewItem:e,modelCursor:t,modelRange:null});if(e.is("element")?this.fire("element:"+e.name,i,this.conversionApi):e.is("$text")?this.fire("text",i,this.conversionApi):this.fire("documentFragment",i,this.conversionApi),i.modelRange&&!(i.modelRange instanceof sa))throw new l.a("view-conversion-dispatcher-incorrect-result",this);return{modelRange:i.modelRange,modelCursor:i.modelCursor}}_convertChildren(e,t){let i=t.is("position")?t:ia._createAt(t,0);const o=new sa(i);for(const t of Array.from(e.getChildren())){const e=this._convertItem(t,i);e.modelRange instanceof sa&&(o.end=e.modelRange.end,i=e.modelCursor)}return{modelRange:o,modelCursor:i}}_safeInsert(e,t){const i=this._splitToAllowedParent(e,t);return!!i&&(this.conversionApi.writer.insert(e,i.position),!0)}_updateConversionResult(e,t){const i=this._getSplitParts(e),o=this.conversionApi.writer;t.modelRange||(t.modelRange=o.createRange(o.createPositionBefore(e),o.createPositionAfter(i[i.length-1])));const n=this._cursorParents.get(e);t.modelCursor=n?o.createPositionAt(n,0):t.modelRange.end}_splitToAllowedParent(e,t){const{schema:i,writer:o}=this.conversionApi;let n=i.findAllowedParent(t,e);if(n){if(n===t.parent)return{position:t};this._modelCursor.parent.getAncestors().includes(n)&&(n=null)}if(!n)return Ma(t,e,i)?{position:Na(t,o)}:null;const r=this.conversionApi.writer.split(t,n),s=[];for(const e of r.range.getWalker())if("elementEnd"==e.type)s.push(e.item);else{const t=s.pop(),i=e.item;this._registerSplitPair(t,i)}const a=r.range.end.parent;return this._cursorParents.set(e,a),{position:r.position,cursorParent:a}}_registerSplitPair(e,t){this._splitParts.has(e)||this._splitParts.set(e,[e]);const i=this._splitParts.get(e);this._splitParts.set(t,i),i.push(t)}_getSplitParts(e){let t;return t=this._splitParts.has(e)?this._splitParts.get(e):[e],t}_removeEmptyElements(){let e=!1;for(const t of this._splitParts.keys())t.isEmpty&&(this.conversionApi.writer.remove(t),this._splitParts.delete(t),e=!0);e&&this._removeEmptyElements()}}Ye(al,h);class ll{getHtml(e){const t=document.implementation.createHTMLDocument("").createElement("div");return t.appendChild(e),t.innerHTML}}class cl{constructor(e){this._domParser=new DOMParser,this._domConverter=new Er(e,{blockFillerMode:"nbsp"}),this._htmlWriter=new ll}toData(e){const t=this._domConverter.viewToDom(e,document);return this._htmlWriter.getHtml(t)}toView(e){const t=this._toDom(e);return this._domConverter.domToView(t)}registerRawContentMatcher(e){this._domConverter.registerRawContentMatcher(e)}useFillerType(e){this._domConverter.blockFillerMode="marked"==e?"markedNbsp":"nbsp"}_toDom(e){const t=this._domParser.parseFromString(e,"text/html"),i=t.createDocumentFragment(),o=t.body.childNodes;for(;o.length>0;)i.appendChild(o[0]);return i}}class dl{constructor(e,t){this.model=e,this.mapper=new aa,this.downcastDispatcher=new da({mapper:this.mapper,schema:e.schema}),this.downcastDispatcher.on("insert:$text",(e,t,i)=>{if(!i.consumable.consume(t.item,"insert"))return;const o=i.writer,n=i.mapper.toViewPosition(t.range.start),r=o.createText(t.item.data);o.insert(n,r)},{priority:"lowest"}),this.upcastDispatcher=new al({schema:e.schema}),this.viewDocument=new yn(t),this.stylesProcessor=t,this.htmlProcessor=new cl(this.viewDocument),this.processor=this.htmlProcessor,this._viewWriter=new $n(this.viewDocument),this.upcastDispatcher.on("text",(e,t,{schema:i,consumable:o,writer:n})=>{let r=t.modelCursor;if(!o.test(t.viewItem))return;if(!i.checkChild(r,"$text")){if(!Ma(r,"$text",i))return;r=Na(r,n)}o.consume(t.viewItem);const s=n.createText(t.viewItem.data);n.insert(s,r),t.modelRange=n.createRange(r,r.getShiftedBy(s.offsetSize)),t.modelCursor=t.modelRange.end},{priority:"lowest"}),this.upcastDispatcher.on("element",(e,t,i)=>{if(!t.modelRange&&i.consumable.consume(t.viewItem,{name:!0})){const{modelRange:e,modelCursor:o}=i.convertChildren(t.viewItem,t.modelCursor);t.modelRange=e,t.modelCursor=o}},{priority:"lowest"}),this.upcastDispatcher.on("documentFragment",(e,t,i)=>{if(!t.modelRange&&i.consumable.consume(t.viewItem,{name:!0})){const{modelRange:e,modelCursor:o}=i.convertChildren(t.viewItem,t.modelCursor);t.modelRange=e,t.modelCursor=o}},{priority:"lowest"}),this.decorate("init"),this.decorate("set"),this.on("init",()=>{this.fire("ready")},{priority:"lowest"}),this.on("ready",()=>{this.model.enqueueChange("transparent",Oa)},{priority:"lowest"})}get(e={}){const{rootName:t="main",trim:i="empty"}=e;if(!this._checkIfRootsExists([t]))throw new l.a("datacontroller-get-non-existent-root",this);const o=this.model.document.getRoot(t);return"empty"!==i||this.model.hasContent(o,{ignoreWhitespaces:!0})?this.stringify(o,e):""}stringify(e,t={}){const i=this.toView(e,t);return this.processor.toData(i)}toView(e,t={}){const i=this.viewDocument,o=this._viewWriter;this.mapper.clearBindings();const n=sa._createIn(e),r=new qn(i);this.mapper.bindElements(e,r),this.downcastDispatcher.conversionApi.options=t,this.downcastDispatcher.convertInsert(n,o);const s=e.is("documentFragment")?Array.from(e.markers):function(e){const t=[],i=e.root.document;if(!i)return[];const o=sa._createIn(e);for(const e of i.model.markers){const i=o.getIntersection(e.getRange());i&&t.push([e.name,i])}return t}(e);for(const[e,t]of s)this.downcastDispatcher.convertMarkerAdd(e,t,o);return delete this.downcastDispatcher.conversionApi.options,r}init(e){if(this.model.document.version)throw new l.a("datacontroller-init-document-not-empty",this);let t={};if("string"==typeof e?t.main=e:t=e,!this._checkIfRootsExists(Object.keys(t)))throw new l.a("datacontroller-init-non-existent-root",this);return this.model.enqueueChange("transparent",e=>{for(const i of Object.keys(t)){const o=this.model.document.getRoot(i);e.insert(this.parse(t[i],o),o,0)}}),Promise.resolve()}set(e){let t={};if("string"==typeof e?t.main=e:t=e,!this._checkIfRootsExists(Object.keys(t)))throw new l.a("datacontroller-set-non-existent-root",this);this.model.enqueueChange("transparent",e=>{e.setSelection(null),e.removeSelectionAttribute(this.model.document.selection.getAttributeKeys());for(const i of Object.keys(t)){const o=this.model.document.getRoot(i);e.remove(e.createRangeIn(o)),e.insert(this.parse(t[i],o),o,0)}})}parse(e,t="$root"){const i=this.processor.toView(e);return this.toModel(i,t)}toModel(e,t="$root"){return this.model.change(i=>this.upcastDispatcher.convert(e,i,t))}addStyleProcessorRules(e){e(this.stylesProcessor)}registerRawContentMatcher(e){this.processor&&this.processor!==this.htmlProcessor&&this.processor.registerRawContentMatcher(e),this.htmlProcessor.registerRawContentMatcher(e)}destroy(){this.stopListening()}_checkIfRootsExists(e){for(const t of e)if(!this.model.document.getRootNames().includes(t))return!1;return!0}}Ye(dl,qe);class hl{constructor(e,t){this._helpers=new Map,this._downcast=to(e),this._createConversionHelpers({name:"downcast",dispatchers:this._downcast,isDowncast:!0}),this._upcast=to(t),this._createConversionHelpers({name:"upcast",dispatchers:this._upcast,isDowncast:!1})}addAlias(e,t){const i=this._downcast.includes(t);if(!this._upcast.includes(t)&&!i)throw new l.a("conversion-add-alias-dispatcher-not-registered",this);this._createConversionHelpers({name:e,dispatchers:[t],isDowncast:i})}for(e){if(!this._helpers.has(e))throw new l.a("conversion-for-unknown-group",this);return this._helpers.get(e)}elementToElement(e){this.for("downcast").elementToElement(e);for(const{model:t,view:i}of ul(e))this.for("upcast").elementToElement({model:t,view:i,converterPriority:e.converterPriority})}attributeToElement(e){this.for("downcast").attributeToElement(e);for(const{model:t,view:i}of ul(e))this.for("upcast").elementToAttribute({view:i,model:t,converterPriority:e.converterPriority})}attributeToAttribute(e){this.for("downcast").attributeToAttribute(e);for(const{model:t,view:i}of ul(e))this.for("upcast").attributeToAttribute({view:i,model:t})}_createConversionHelpers({name:e,dispatchers:t,isDowncast:i}){if(this._helpers.has(e))throw new l.a("conversion-group-exists",this);const o=i?new Ea(t):new Ba(t);this._helpers.set(e,o)}}function*ul(e){if(e.model.values)for(const t of e.model.values){const i={key:e.model.key,value:t},o=e.view[t],n=e.upcastAlso?e.upcastAlso[t]:void 0;yield*ml(i,o,n)}else yield*ml(e.model,e.view,e.upcastAlso)}function*ml(e,t,i){if(yield{model:e,view:t},i)for(const t of to(i))yield{model:e,view:t}}class gl{constructor(e="default"){this.operations=[],this.type=e}get baseVersion(){for(const e of this.operations)if(null!==e.baseVersion)return e.baseVersion;return null}addOperation(e){return e.batch=this,this.operations.push(e),e}}class fl{constructor(e){this.baseVersion=e,this.isDocumentOperation=null!==this.baseVersion,this.batch=null}_validate(){}toJSON(){const e=Object.assign({},this);return e.__className=this.constructor.className,delete e.batch,delete e.isDocumentOperation,e}static get className(){return"Operation"}static fromJSON(e){return new this(e.baseVersion)}}class pl{constructor(e){this.markers=new Map,this._children=new Xs,e&&this._insertChild(0,e)}[Symbol.iterator](){return this.getChildren()}get childCount(){return this._children.length}get maxOffset(){return this._children.maxOffset}get isEmpty(){return 0===this.childCount}get root(){return this}get parent(){return null}is(e){return"documentFragment"===e||"model:documentFragment"===e}getChild(e){return this._children.getNode(e)}getChildren(){return this._children[Symbol.iterator]()}getChildIndex(e){return this._children.getNodeIndex(e)}getChildStartOffset(e){return this._children.getNodeStartOffset(e)}getPath(){return[]}getNodeByPath(e){let t=this;for(const i of e)t=t.getChild(t.offsetToIndex(i));return t}offsetToIndex(e){return this._children.offsetToIndex(e)}toJSON(){const e=[];for(const t of this._children)e.push(t.toJSON());return e}static fromJSON(e){const t=[];for(const i of e)i.name?t.push(Zs.fromJSON(i)):t.push(Ys.fromJSON(i));return new pl(t)}_appendChild(e){this._insertChild(this.childCount,e)}_insertChild(e,t){const i=function(e){if("string"==typeof e)return[new Ys(e)];Xi(e)||(e=[e]);return Array.from(e).map(e=>"string"==typeof e?new Ys(e):e instanceof Qs?new Ys(e.data,e.getAttributes()):e)}(t);for(const e of i)null!==e.parent&&e._remove(),e.parent=this;this._children._insertNodes(e,i)}_removeChildren(e,t=1){const i=this._children._removeNodes(e,t);for(const e of i)e.parent=null;return i}}function bl(e,t){const i=(t=_l(t)).reduce((e,t)=>e+t.offsetSize,0),o=e.parent;yl(e);const n=e.index;return o._insertChild(n,t),vl(o,n+t.length),vl(o,n),new sa(e,e.getShiftedBy(i))}function wl(e){if(!e.isFlat)throw new l.a("operation-utils-remove-range-not-flat",this);const t=e.start.parent;yl(e.start),yl(e.end);const i=t._removeChildren(e.start.index,e.end.index-e.start.index);return vl(t,e.start.index),i}function kl(e,t){if(!e.isFlat)throw new l.a("operation-utils-move-range-not-flat",this);const i=wl(e);return bl(t=t._getTransformedByDeletion(e.start,e.end.offset-e.start.offset),i)}function _l(e){const t=[];e instanceof Array||(e=[e]);for(let i=0;ie.maxOffset)throw new l.a("move-operation-nodes-do-not-exist",this);if(e===t&&i=i&&this.targetPosition.path[e]e._clone(!0))),t=new Pl(this.position,e,this.baseVersion);return t.shouldReceiveAttributes=this.shouldReceiveAttributes,t}getReversed(){const e=this.position.root.document.graveyard,t=new ia(e,[0]);return new El(this.position,this.nodes.maxOffset,t,this.baseVersion+1)}_validate(){const e=this.position.parent;if(!e||e.maxOffsete._clone(!0))),bl(this.position,e)}toJSON(){const e=super.toJSON();return e.position=this.position.toJSON(),e.nodes=this.nodes.toJSON(),e}static get className(){return"InsertOperation"}static fromJSON(e,t){const i=[];for(const t of e.nodes)t.name?i.push(Zs.fromJSON(t)):i.push(Ys.fromJSON(t));const o=new Pl(ia.fromJSON(e.position,t),i,e.baseVersion);return o.shouldReceiveAttributes=e.shouldReceiveAttributes,o}}class Sl extends fl{constructor(e,t,i,o,n,r){super(r),this.name=e,this.oldRange=t?t.clone():null,this.newRange=i?i.clone():null,this.affectsData=n,this._markers=o}get type(){return"marker"}clone(){return new Sl(this.name,this.oldRange,this.newRange,this._markers,this.affectsData,this.baseVersion)}getReversed(){return new Sl(this.name,this.newRange,this.oldRange,this._markers,this.affectsData,this.baseVersion+1)}_execute(){const e=this.newRange?"_set":"_remove";this._markers[e](this.name,this.newRange,!0,this.affectsData)}toJSON(){const e=super.toJSON();return this.oldRange&&(e.oldRange=this.oldRange.toJSON()),this.newRange&&(e.newRange=this.newRange.toJSON()),delete e._markers,e}static get className(){return"MarkerOperation"}static fromJSON(e,t){return new Sl(e.name,e.oldRange?sa.fromJSON(e.oldRange,t):null,e.newRange?sa.fromJSON(e.newRange,t):null,t.model.markers,e.affectsData,e.baseVersion)}}class Rl extends fl{constructor(e,t,i,o){super(o),this.position=e,this.position.stickiness="toNext",this.oldName=t,this.newName=i}get type(){return"rename"}clone(){return new Rl(this.position.clone(),this.oldName,this.newName,this.baseVersion)}getReversed(){return new Rl(this.position.clone(),this.newName,this.oldName,this.baseVersion+1)}_validate(){const e=this.position.nodeAfter;if(!(e instanceof Zs))throw new l.a("rename-operation-wrong-position",this);if(e.name!==this.oldName)throw new l.a("rename-operation-wrong-name",this)}_execute(){this.position.nodeAfter.name=this.newName}toJSON(){const e=super.toJSON();return e.position=this.position.toJSON(),e}static get className(){return"RenameOperation"}static fromJSON(e,t){return new Rl(ia.fromJSON(e.position,t),e.oldName,e.newName,e.baseVersion)}}class Il extends fl{constructor(e,t,i,o,n){super(n),this.root=e,this.key=t,this.oldValue=i,this.newValue=o}get type(){return null===this.oldValue?"addRootAttribute":null===this.newValue?"removeRootAttribute":"changeRootAttribute"}clone(){return new Il(this.root,this.key,this.oldValue,this.newValue,this.baseVersion)}getReversed(){return new Il(this.root,this.key,this.newValue,this.oldValue,this.baseVersion+1)}_validate(){if(this.root!=this.root.root||this.root.is("documentFragment"))throw new l.a("rootattribute-operation-not-a-root",this,{root:this.root,key:this.key});if(null!==this.oldValue&&this.root.getAttribute(this.key)!==this.oldValue)throw new l.a("rootattribute-operation-wrong-old-value",this,{root:this.root,key:this.key});if(null===this.oldValue&&null!==this.newValue&&this.root.hasAttribute(this.key))throw new l.a("rootattribute-operation-attribute-exists",this,{root:this.root,key:this.key})}_execute(){null!==this.newValue?this.root._setAttribute(this.key,this.newValue):this.root._removeAttribute(this.key)}toJSON(){const e=super.toJSON();return e.root=this.root.toJSON(),e}static get className(){return"RootAttributeOperation"}static fromJSON(e,t){if(!t.getRoot(e.root))throw new l.a("rootattribute-operation-fromjson-no-root",this,{rootName:e.root});return new Il(t.getRoot(e.root),e.key,e.oldValue,e.newValue,e.baseVersion)}}class Vl extends fl{constructor(e,t,i,o,n){super(n),this.sourcePosition=e.clone(),this.sourcePosition.stickiness="toPrevious",this.howMany=t,this.targetPosition=i.clone(),this.targetPosition.stickiness="toNext",this.graveyardPosition=o.clone()}get type(){return"merge"}get deletionPosition(){return new ia(this.sourcePosition.root,this.sourcePosition.path.slice(0,-1))}get movedRange(){const e=this.sourcePosition.getShiftedBy(Number.POSITIVE_INFINITY);return new sa(this.sourcePosition,e)}clone(){return new this.constructor(this.sourcePosition,this.howMany,this.targetPosition,this.graveyardPosition,this.baseVersion)}getReversed(){const e=this.targetPosition._getTransformedByMergeOperation(this),t=this.sourcePosition.path.slice(0,-1),i=new ia(this.sourcePosition.root,t)._getTransformedByMergeOperation(this);return new zl(e,this.howMany,i,this.graveyardPosition,this.baseVersion+1)}_validate(){const e=this.sourcePosition.parent,t=this.targetPosition.parent;if(!e.parent)throw new l.a("merge-operation-source-position-invalid",this);if(!t.parent)throw new l.a("merge-operation-target-position-invalid",this);if(this.howMany!=e.maxOffset)throw new l.a("merge-operation-how-many-invalid",this)}_execute(){const e=this.sourcePosition.parent;kl(sa._createIn(e),this.targetPosition),kl(sa._createOn(e),this.graveyardPosition)}toJSON(){const e=super.toJSON();return e.sourcePosition=e.sourcePosition.toJSON(),e.targetPosition=e.targetPosition.toJSON(),e.graveyardPosition=e.graveyardPosition.toJSON(),e}static get className(){return"MergeOperation"}static fromJSON(e,t){const i=ia.fromJSON(e.sourcePosition,t),o=ia.fromJSON(e.targetPosition,t),n=ia.fromJSON(e.graveyardPosition,t);return new this(i,e.howMany,o,n,e.baseVersion)}}class zl extends fl{constructor(e,t,i,o,n){super(n),this.splitPosition=e.clone(),this.splitPosition.stickiness="toNext",this.howMany=t,this.insertionPosition=i,this.graveyardPosition=o?o.clone():null,this.graveyardPosition&&(this.graveyardPosition.stickiness="toNext")}get type(){return"split"}get moveTargetPosition(){const e=this.insertionPosition.path.slice();return e.push(0),new ia(this.insertionPosition.root,e)}get movedRange(){const e=this.splitPosition.getShiftedBy(Number.POSITIVE_INFINITY);return new sa(this.splitPosition,e)}clone(){return new this.constructor(this.splitPosition,this.howMany,this.insertionPosition,this.graveyardPosition,this.baseVersion)}getReversed(){const e=this.splitPosition.root.document.graveyard,t=new ia(e,[0]);return new Vl(this.moveTargetPosition,this.howMany,this.splitPosition,t,this.baseVersion+1)}_validate(){const e=this.splitPosition.parent,t=this.splitPosition.offset;if(!e||e.maxOffset{for(const t of e.getAttributeKeys())this.removeAttribute(t,e)};if(e instanceof sa)for(const i of e.getItems())t(i);else t(e)}move(e,t,i){if(this._assertWriterUsedCorrectly(),!(e instanceof sa))throw new l.a("writer-move-invalid-range",this);if(!e.isFlat)throw new l.a("writer-move-range-not-flat",this);const o=ia._createAt(t,i);if(o.isEqual(e.start))return;if(this._addOperationForAffectedMarkers("move",e),!Ll(e.root,o.root))throw new l.a("writer-move-different-document",this);const n=e.root.document?e.root.document.version:null,r=new El(e.start,e.end.offset-e.start.offset,o,n);this.batch.addOperation(r),this.model.applyOperation(r)}remove(e){this._assertWriterUsedCorrectly();const t=(e instanceof sa?e:sa._createOn(e)).getMinimalFlatRanges().reverse();for(const e of t)this._addOperationForAffectedMarkers("move",e),Dl(e.start,e.end.offset-e.start.offset,this.batch,this.model)}merge(e){this._assertWriterUsedCorrectly();const t=e.nodeBefore,i=e.nodeAfter;if(this._addOperationForAffectedMarkers("merge",e),!(t instanceof Zs))throw new l.a("writer-merge-no-element-before",this);if(!(i instanceof Zs))throw new l.a("writer-merge-no-element-after",this);e.root.document?this._merge(e):this._mergeDetached(e)}createPositionFromPath(e,t,i){return this.model.createPositionFromPath(e,t,i)}createPositionAt(e,t){return this.model.createPositionAt(e,t)}createPositionAfter(e){return this.model.createPositionAfter(e)}createPositionBefore(e){return this.model.createPositionBefore(e)}createRange(e,t){return this.model.createRange(e,t)}createRangeIn(e){return this.model.createRangeIn(e)}createRangeOn(e){return this.model.createRangeOn(e)}createSelection(e,t,i){return this.model.createSelection(e,t,i)}_mergeDetached(e){const t=e.nodeBefore,i=e.nodeAfter;this.move(sa._createIn(i),ia._createAt(t,"end")),this.remove(i)}_merge(e){const t=ia._createAt(e.nodeBefore,"end"),i=ia._createAt(e.nodeAfter,0),o=e.root.document.graveyard,n=new ia(o,[0]),r=e.root.document.version,s=new Vl(i,e.nodeAfter.maxOffset,t,n,r);this.batch.addOperation(s),this.model.applyOperation(s)}rename(e,t){if(this._assertWriterUsedCorrectly(),!(e instanceof Zs))throw new l.a("writer-rename-not-element-instance",this);const i=e.root.document?e.root.document.version:null,o=new Rl(ia._createBefore(e),e.name,t,i);this.batch.addOperation(o),this.model.applyOperation(o)}split(e,t){this._assertWriterUsedCorrectly();let i,o,n=e.parent;if(!n.parent)throw new l.a("writer-split-element-no-parent",this);if(t||(t=n.parent),!e.parent.getAncestors({includeSelf:!0}).includes(t))throw new l.a("writer-split-invalid-limit-element",this);do{const t=n.root.document?n.root.document.version:null,r=n.maxOffset-e.offset,s=zl.getInsertionPosition(e),a=new zl(e,r,s,null,t);this.batch.addOperation(a),this.model.applyOperation(a),i||o||(i=n,o=e.parent.nextSibling),n=(e=this.createPositionAfter(e.parent)).parent}while(n!==t);return{position:e,range:new sa(ia._createAt(i,"end"),ia._createAt(o,0))}}wrap(e,t){if(this._assertWriterUsedCorrectly(),!e.isFlat)throw new l.a("writer-wrap-range-not-flat",this);const i=t instanceof Zs?t:new Zs(t);if(i.childCount>0)throw new l.a("writer-wrap-element-not-empty",this);if(null!==i.parent)throw new l.a("writer-wrap-element-attached",this);this.insert(i,e.start);const o=new sa(e.start.getShiftedBy(1),e.end.getShiftedBy(1));this.move(o,ia._createAt(i,0))}unwrap(e){if(this._assertWriterUsedCorrectly(),null===e.parent)throw new l.a("writer-unwrap-element-no-parent",this);this.move(sa._createIn(e),this.createPositionAfter(e)),this.remove(e)}addMarker(e,t){if(this._assertWriterUsedCorrectly(),!t||"boolean"!=typeof t.usingOperation)throw new l.a("writer-addmarker-no-usingoperation",this);const i=t.usingOperation,o=t.range,n=void 0!==t.affectsData&&t.affectsData;if(this.model.markers.has(e))throw new l.a("writer-addmarker-marker-exists",this);if(!o)throw new l.a("writer-addmarker-no-range",this);return i?(Fl(this,e,null,o,n),this.model.markers.get(e)):this.model.markers._set(e,o,i,n)}updateMarker(e,t){this._assertWriterUsedCorrectly();const i="string"==typeof e?e:e.name,o=this.model.markers.get(i);if(!o)throw new l.a("writer-updatemarker-marker-not-exists",this);if(!t)return void this.model.markers._refresh(o);const n="boolean"==typeof t.usingOperation,r="boolean"==typeof t.affectsData,s=r?t.affectsData:o.affectsData;if(!n&&!t.range&&!r)throw new l.a("writer-updatemarker-wrong-options",this);const a=o.getRange(),c=t.range?t.range:a;n&&t.usingOperation!==o.managedUsingOperations?t.usingOperation?Fl(this,i,null,c,s):(Fl(this,i,a,null,s),this.model.markers._set(i,c,void 0,s)):o.managedUsingOperations?Fl(this,i,a,c,s):this.model.markers._set(i,c,void 0,s)}removeMarker(e){this._assertWriterUsedCorrectly();const t="string"==typeof e?e:e.name;if(!this.model.markers.has(t))throw new l.a("writer-removemarker-no-marker",this);const i=this.model.markers.get(t);if(!i.managedUsingOperations)return void this.model.markers._remove(t);Fl(this,t,i.getRange(),null,i.affectsData)}setSelection(e,t,i){this._assertWriterUsedCorrectly(),this.model.document.selection._setTo(e,t,i)}setSelectionFocus(e,t){this._assertWriterUsedCorrectly(),this.model.document.selection._setFocus(e,t)}setSelectionAttribute(e,t){if(this._assertWriterUsedCorrectly(),"string"==typeof e)this._setSelectionAttribute(e,t);else for(const[t,i]of go(e))this._setSelectionAttribute(t,i)}removeSelectionAttribute(e){if(this._assertWriterUsedCorrectly(),"string"==typeof e)this._removeSelectionAttribute(e);else for(const t of e)this._removeSelectionAttribute(t)}overrideSelectionGravity(){return this.model.document.selection._overrideGravity()}restoreSelectionGravity(e){this.model.document.selection._restoreGravity(e)}_setSelectionAttribute(e,t){const i=this.model.document.selection;if(i.isCollapsed&&i.anchor.parent.isEmpty){const o=ya._getStoreAttributeKey(e);this.setAttribute(o,t,i.anchor.parent)}i._setAttribute(e,t)}_removeSelectionAttribute(e){const t=this.model.document.selection;if(t.isCollapsed&&t.anchor.parent.isEmpty){const i=ya._getStoreAttributeKey(e);this.removeAttribute(i,t.anchor.parent)}t._removeAttribute(e)}_assertWriterUsedCorrectly(){if(this.model._currentWriter!==this)throw new l.a("writer-incorrect-use",this)}_addOperationForAffectedMarkers(e,t){for(const i of this.model.markers){if(!i.managedUsingOperations)continue;const o=i.getRange();let n=!1;if("move"===e)n=t.containsPosition(o.start)||t.start.isEqual(o.start)||t.containsPosition(o.end)||t.end.isEqual(o.end);else{const e=t.nodeBefore,i=t.nodeAfter,r=o.start.parent==e&&o.start.isAtEnd,s=o.end.parent==i&&0==o.end.offset,a=o.end.nodeAfter==i,l=o.start.nodeAfter==i;n=r||s||a||l}n&&this.updateMarker(i.name,{range:o})}}}function Nl(e,t,i,o){const n=e.model,r=n.document;let s,a,l,c=o.start;for(const e of o.getWalker({shallow:!0}))l=e.item.getAttribute(t),s&&a!=l&&(a!=i&&d(),c=s),s=e.nextPosition,a=l;function d(){const o=new sa(c,s),l=o.root.document?r.version:null,d=new Al(o,t,a,i,l);e.batch.addOperation(d),n.applyOperation(d)}s instanceof ia&&s!=c&&a!=i&&d()}function Bl(e,t,i,o){const n=e.model,r=n.document,s=o.getAttribute(t);let a,l;if(s!=i){if(o.root===o){const e=o.document?r.version:null;l=new Il(o,t,s,i,e)}else{a=new sa(ia._createBefore(o),e.createPositionAfter(o));const n=a.root.document?r.version:null;l=new Al(a,t,s,i,n)}e.batch.addOperation(l),n.applyOperation(l)}}function Fl(e,t,i,o,n){const r=e.model,s=r.document,a=new Sl(t,i,o,r.markers,n,s.version);e.batch.addOperation(a),r.applyOperation(a)}function Dl(e,t,i,o){let n;if(e.root.document){const i=o.document,r=new ia(i.graveyard,[0]);n=new El(e,t,r,i.version)}else n=new Tl(e,t);i.addOperation(n),o.applyOperation(n)}function Ll(e,t){return e===t||e instanceof Ol&&t instanceof Ol}class Hl{constructor(e){this._markerCollection=e,this._changesInElement=new Map,this._elementSnapshots=new Map,this._changedMarkers=new Map,this._changeCount=0,this._cachedChanges=null,this._cachedChangesWithGraveyard=null}get isEmpty(){return 0==this._changesInElement.size&&0==this._changedMarkers.size}refreshItem(e){if(this._isInInsertedElement(e.parent))return;this._markRemove(e.parent,e.startOffset,e.offsetSize),this._markInsert(e.parent,e.startOffset,e.offsetSize);const t=sa._createOn(e);for(const e of this._markerCollection.getMarkersIntersectingRange(t)){const t=e.getRange();this.bufferMarkerChange(e.name,t,t,e.affectsData)}this._cachedChanges=null}bufferOperation(e){switch(e.type){case"insert":if(this._isInInsertedElement(e.position.parent))return;this._markInsert(e.position.parent,e.position.offset,e.nodes.maxOffset);break;case"addAttribute":case"removeAttribute":case"changeAttribute":for(const t of e.range.getItems({shallow:!0}))this._isInInsertedElement(t.parent)||this._markAttribute(t);break;case"remove":case"move":case"reinsert":{if(e.sourcePosition.isEqual(e.targetPosition)||e.sourcePosition.getShiftedBy(e.howMany).isEqual(e.targetPosition))return;const t=this._isInInsertedElement(e.sourcePosition.parent),i=this._isInInsertedElement(e.targetPosition.parent);t||this._markRemove(e.sourcePosition.parent,e.sourcePosition.offset,e.howMany),i||this._markInsert(e.targetPosition.parent,e.getMovedRangeStart().offset,e.howMany);break}case"rename":{if(this._isInInsertedElement(e.position.parent))return;this._markRemove(e.position.parent,e.position.offset,1),this._markInsert(e.position.parent,e.position.offset,1);const t=sa._createFromPositionAndShift(e.position,1);for(const e of this._markerCollection.getMarkersIntersectingRange(t)){const t=e.getRange();this.bufferMarkerChange(e.name,t,t,e.affectsData)}break}case"split":{const t=e.splitPosition.parent;this._isInInsertedElement(t)||this._markRemove(t,e.splitPosition.offset,e.howMany),this._isInInsertedElement(e.insertionPosition.parent)||this._markInsert(e.insertionPosition.parent,e.insertionPosition.offset,1),e.graveyardPosition&&this._markRemove(e.graveyardPosition.parent,e.graveyardPosition.offset,1);break}case"merge":{const t=e.sourcePosition.parent;this._isInInsertedElement(t.parent)||this._markRemove(t.parent,t.startOffset,1);const i=e.graveyardPosition.parent;this._markInsert(i,e.graveyardPosition.offset,1);const o=e.targetPosition.parent;this._isInInsertedElement(o)||this._markInsert(o,e.targetPosition.offset,t.maxOffset);break}}this._cachedChanges=null}bufferMarkerChange(e,t,i,o){const n=this._changedMarkers.get(e);n?(n.newRange=i,n.affectsData=o,null==n.oldRange&&null==n.newRange&&this._changedMarkers.delete(e)):this._changedMarkers.set(e,{oldRange:t,newRange:i,affectsData:o})}getMarkersToRemove(){const e=[];for(const[t,i]of this._changedMarkers)null!=i.oldRange&&e.push({name:t,range:i.oldRange});return e}getMarkersToAdd(){const e=[];for(const[t,i]of this._changedMarkers)null!=i.newRange&&e.push({name:t,range:i.newRange});return e}getChangedMarkers(){return Array.from(this._changedMarkers).map(e=>({name:e[0],data:{oldRange:e[1].oldRange,newRange:e[1].newRange}}))}hasDataChanges(){for(const[,e]of this._changedMarkers)if(e.affectsData)return!0;return this._changesInElement.size>0}getChanges(e={includeChangesInGraveyard:!1}){if(this._cachedChanges)return e.includeChangesInGraveyard?this._cachedChangesWithGraveyard.slice():this._cachedChanges.slice();let t=[];for(const e of this._changesInElement.keys()){const i=this._changesInElement.get(e).sort((e,t)=>e.offset===t.offset?e.type!=t.type?"remove"==e.type?-1:1:0:e.offsete.position.root!=t.position.root?e.position.root.rootNamee);for(const e of t)delete e.changeCount,"attribute"==e.type&&(delete e.position,delete e.length);return this._changeCount=0,this._cachedChangesWithGraveyard=t.slice(),this._cachedChanges=t.filter(ql),e.includeChangesInGraveyard?this._cachedChangesWithGraveyard:this._cachedChanges}reset(){this._changesInElement.clear(),this._elementSnapshots.clear(),this._changedMarkers.clear(),this._cachedChanges=null}_markInsert(e,t,i){const o={type:"insert",offset:t,howMany:i,count:this._changeCount++};this._markChange(e,o)}_markRemove(e,t,i){const o={type:"remove",offset:t,howMany:i,count:this._changeCount++};this._markChange(e,o),this._removeAllNestedChanges(e,t,i)}_markAttribute(e){const t={type:"attribute",offset:e.startOffset,howMany:e.offsetSize,count:this._changeCount++};this._markChange(e.parent,t)}_markChange(e,t){this._makeSnapshot(e);const i=this._getChangesForElement(e);this._handleChange(t,i),i.push(t);for(let e=0;ei.offset){if(o>n){const e={type:"attribute",offset:n,howMany:o-n,count:this._changeCount++};this._handleChange(e,t),t.push(e)}e.nodesToHandle=i.offset-e.offset,e.howMany=e.nodesToHandle}else e.offset>=i.offset&&e.offsetn?(e.nodesToHandle=o-n,e.offset=n):e.nodesToHandle=0);if("remove"==i.type&&e.offseti.offset){const n={type:"attribute",offset:i.offset,howMany:o-i.offset,count:this._changeCount++};this._handleChange(n,t),t.push(n),e.nodesToHandle=i.offset-e.offset,e.howMany=e.nodesToHandle}"attribute"==i.type&&(e.offset>=i.offset&&o<=n?(e.nodesToHandle=0,e.howMany=0,e.offset=0):e.offset<=i.offset&&o>=n&&(i.howMany=0))}}e.howMany=e.nodesToHandle,delete e.nodesToHandle}_getInsertDiff(e,t,i){return{type:"insert",position:ia._createAt(e,t),name:i,length:1,changeCount:this._changeCount++}}_getRemoveDiff(e,t,i){return{type:"remove",position:ia._createAt(e,t),name:i,length:1,changeCount:this._changeCount++}}_getAttributesDiff(e,t,i){const o=[];i=new Map(i);for(const[n,r]of t){const t=i.has(n)?i.get(n):null;t!==r&&o.push({type:"attribute",position:e.start,range:e.clone(),length:1,attributeKey:n,attributeOldValue:r,attributeNewValue:t,changeCount:this._changeCount++}),i.delete(n)}for(const[t,n]of i)o.push({type:"attribute",position:e.start,range:e.clone(),length:1,attributeKey:t,attributeOldValue:null,attributeNewValue:n,changeCount:this._changeCount++});return o}_isInInsertedElement(e){const t=e.parent;if(!t)return!1;const i=this._changesInElement.get(t),o=e.startOffset;if(i)for(const e of i)if("insert"==e.type&&o>=e.offset&&oo){for(let t=0;t=e&&o.baseVersion{const i=t[0];if(i.isDocumentOperation&&i.baseVersion!==this.version)throw new l.a("model-document-applyoperation-wrong-version",this,{operation:i})},{priority:"highest"}),this.listenTo(e,"applyOperation",(e,t)=>{const i=t[0];i.isDocumentOperation&&this.differ.bufferOperation(i)},{priority:"high"}),this.listenTo(e,"applyOperation",(e,t)=>{const i=t[0];i.isDocumentOperation&&(this.version++,this.history.addOperation(i))},{priority:"low"}),this.listenTo(this.selection,"change",()=>{this._hasSelectionChangedFromTheLastChangeBlock=!0}),this.listenTo(e.markers,"update",(e,t,i,o)=>{this.differ.bufferMarkerChange(t.name,i,o,t.affectsData),null===i&&t.on("change",(e,i)=>{this.differ.bufferMarkerChange(t.name,i,t.getRange(),t.affectsData)})})}get graveyard(){return this.getRoot("$graveyard")}createRoot(e="$root",t="main"){if(this.roots.get(t))throw new l.a("model-document-createroot-name-exists",this,{name:t});const i=new Ol(this,e,t);return this.roots.add(i),i}destroy(){this.selection.destroy(),this.stopListening()}getRoot(e="main"){return this.roots.get(e)}getRootNames(){return Array.from(this.roots,e=>e.rootName).filter(e=>"$graveyard"!=e)}registerPostFixer(e){this._postFixers.add(e)}toJSON(){const e=co(this);return e.selection="[engine.model.DocumentSelection]",e.model="[engine.model.Model]",e}_handleChangeBlock(e){this._hasDocumentChangedFromTheLastChangeBlock()&&(this._callPostFixers(e),this.selection.refresh(),this.differ.hasDataChanges()?this.fire("change:data",e.batch):this.fire("change",e.batch),this.selection.refresh(),this.differ.reset()),this._hasSelectionChangedFromTheLastChangeBlock=!1}_hasDocumentChangedFromTheLastChangeBlock(){return!this.differ.isEmpty||this._hasSelectionChangedFromTheLastChangeBlock}_getDefaultRoot(){for(const e of this.roots)if(e!==this.graveyard)return e;return this.graveyard}_getDefaultRange(){const e=this._getDefaultRoot(),t=this.model,i=t.schema,o=t.createPositionFromPath(e,[0]);return i.getNearestSelectionRange(o)||t.createRange(o)}_validateSelectionRange(e){return Jl(e.start)&&Jl(e.end)}_callPostFixers(e){let t=!1;do{for(const i of this._postFixers)if(this.selection.refresh(),t=i(e),t)break}while(t)}}function Jl(e){const t=e.textNode;if(t){const i=t.data,o=e.offset-t.startOffset;return!Ul(i,o)&&!Kl(i,o)}return!0}Ye(Gl,h);class Yl{constructor(){this._markers=new Map}[Symbol.iterator](){return this._markers.values()}has(e){return this._markers.has(e)}get(e){return this._markers.get(e)||null}_set(e,t,i=!1,o=!1){const n=e instanceof Ql?e.name:e;if(n.includes(","))throw new l.a("markercollection-incorrect-marker-name",this);const r=this._markers.get(n);if(r){const e=r.getRange();let s=!1;return e.isEqual(t)||(r._attachLiveRange(ka.fromRange(t)),s=!0),i!=r.managedUsingOperations&&(r._managedUsingOperations=i,s=!0),"boolean"==typeof o&&o!=r.affectsData&&(r._affectsData=o,s=!0),s&&this.fire("update:"+n,r,e,t),r}const s=ka.fromRange(t),a=new Ql(n,s,i,o);return this._markers.set(n,a),this.fire("update:"+n,a,null,t),a}_remove(e){const t=e instanceof Ql?e.name:e,i=this._markers.get(t);return!!i&&(this._markers.delete(t),this.fire("update:"+t,i,i.getRange(),null),this._destroyMarker(i),!0)}_refresh(e){const t=e instanceof Ql?e.name:e,i=this._markers.get(t);if(!i)throw new l.a("markercollection-refresh-marker-not-exists",this);const o=i.getRange();this.fire("update:"+t,i,o,o,i.managedUsingOperations,i.affectsData)}*getMarkersAtPosition(e){for(const t of this)t.getRange().containsPosition(e)&&(yield t)}*getMarkersIntersectingRange(e){for(const t of this)null!==t.getRange().getIntersection(e)&&(yield t)}destroy(){for(const e of this._markers.values())this._destroyMarker(e);this._markers=null,this.stopListening()}*getMarkersGroup(e){for(const t of this._markers.values())t.name.startsWith(e+":")&&(yield t)}_destroyMarker(e){e.stopListening(),e._detachLiveRange()}}Ye(Yl,h);class Ql{constructor(e,t,i,o){this.name=e,this._liveRange=this._attachLiveRange(t),this._managedUsingOperations=i,this._affectsData=o}get managedUsingOperations(){if(!this._liveRange)throw new l.a("marker-destroyed",this);return this._managedUsingOperations}get affectsData(){if(!this._liveRange)throw new l.a("marker-destroyed",this);return this._affectsData}getStart(){if(!this._liveRange)throw new l.a("marker-destroyed",this);return this._liveRange.start.clone()}getEnd(){if(!this._liveRange)throw new l.a("marker-destroyed",this);return this._liveRange.end.clone()}getRange(){if(!this._liveRange)throw new l.a("marker-destroyed",this);return this._liveRange.toRange()}is(e){return"marker"===e||"model:marker"===e}_attachLiveRange(e){return this._liveRange&&this._detachLiveRange(),e.delegate("change:range").to(this),e.delegate("change:content").to(this),this._liveRange=e,e}_detachLiveRange(){this._liveRange.stopDelegating("change:range",this),this._liveRange.stopDelegating("change:content",this),this._liveRange.detach(),this._liveRange=null}}Ye(Ql,h);class Xl extends fl{get type(){return"noop"}clone(){return new Xl(this.baseVersion)}getReversed(){return new Xl(this.baseVersion+1)}_execute(){}static get className(){return"NoOperation"}}const Zl={};Zl[Al.className]=Al,Zl[Pl.className]=Pl,Zl[Sl.className]=Sl,Zl[El.className]=El,Zl[Xl.className]=Xl,Zl[fl.className]=fl,Zl[Rl.className]=Rl,Zl[Il.className]=Il,Zl[zl.className]=zl,Zl[Vl.className]=Vl;class ec extends ia{constructor(e,t,i="toNone"){if(super(e,t,i),!this.root.is("rootElement"))throw new l.a("model-liveposition-root-not-rootelement",e);tc.call(this)}detach(){this.stopListening()}is(e){return"livePosition"===e||"model:livePosition"===e||"position"==e||"model:position"===e}toPosition(){return new ia(this.root,this.path.slice(),this.stickiness)}static fromPosition(e,t){return new this(e.root,e.path.slice(),t||e.stickiness)}}function tc(){this.listenTo(this.root.document.model,"applyOperation",(e,t)=>{const i=t[0];i.isDocumentOperation&&ic.call(this,i)},{priority:"low"})}function ic(e){const t=this.getTransformedByOperation(e);if(!this.isEqual(t)){const e=this.toPosition();this.path=t.path,this.root=t.root,this.fire("change",e)}}Ye(ec,h);class oc{constructor(e,t,i){this.model=e,this.writer=t,this.position=i,this.canMergeWith=new Set([this.position.parent]),this.schema=e.schema,this._documentFragment=t.createDocumentFragment(),this._documentFragmentPosition=t.createPositionAt(this._documentFragment,0),this._firstNode=null,this._lastNode=null,this._lastAutoParagraph=null,this._filterAttributesOf=[],this._affectedStart=null,this._affectedEnd=null}handleNodes(e){for(const t of Array.from(e))this._handleNode(t);this._insertPartialFragment(),this._lastAutoParagraph&&this._updateLastNodeFromAutoParagraph(this._lastAutoParagraph),this._mergeOnRight(),this.schema.removeDisallowedAttributes(this._filterAttributesOf,this.writer),this._filterAttributesOf=[]}_updateLastNodeFromAutoParagraph(e){const t=this.writer.createPositionAfter(this._lastNode),i=this.writer.createPositionAfter(e);if(i.isAfter(t)){if(this._lastNode=e,this.position.parent!=e||!this.position.isAtEnd)throw new l.a("insertcontent-invalid-insertion-position",this);this.position=i,this._setAffectedBoundaries(this.position)}}getSelectionRange(){return this.nodeToSelect?sa._createOn(this.nodeToSelect):this.model.schema.getNearestSelectionRange(this.position)}getAffectedRange(){return this._affectedStart?new sa(this._affectedStart,this._affectedEnd):null}destroy(){this._affectedStart&&this._affectedStart.detach(),this._affectedEnd&&this._affectedEnd.detach()}_handleNode(e){if(this.schema.isObject(e))return void this._handleObject(e);let t=this._checkAndAutoParagraphToAllowedPosition(e);t||(t=this._checkAndSplitToAllowedPosition(e),t)?(this._appendToFragment(e),this._firstNode||(this._firstNode=e),this._lastNode=e):this._handleDisallowedNode(e)}_insertPartialFragment(){if(this._documentFragment.isEmpty)return;const e=ec.fromPosition(this.position,"toNext");this._setAffectedBoundaries(this.position),this._documentFragment.getChild(0)==this._firstNode&&(this.writer.insert(this._firstNode,this.position),this._mergeOnLeft(),this.position=e.toPosition()),this._documentFragment.isEmpty||this.writer.insert(this._documentFragment,this.position),this._documentFragmentPosition=this.writer.createPositionAt(this._documentFragment,0),this.position=e.toPosition(),e.detach()}_handleObject(e){this._checkAndSplitToAllowedPosition(e)?this._appendToFragment(e):this._tryAutoparagraphing(e)}_handleDisallowedNode(e){e.is("element")?this.handleNodes(e.getChildren()):this._tryAutoparagraphing(e)}_appendToFragment(e){if(!this.schema.checkChild(this.position,e))throw new l.a("insertcontent-wrong-position",this,{node:e,position:this.position});this.writer.insert(e,this._documentFragmentPosition),this._documentFragmentPosition=this._documentFragmentPosition.getShiftedBy(e.offsetSize),this.schema.isObject(e)&&!this.schema.checkChild(this.position,"$text")?this.nodeToSelect=e:this.nodeToSelect=null,this._filterAttributesOf.push(e)}_setAffectedBoundaries(e){this._affectedStart||(this._affectedStart=ec.fromPosition(e,"toPrevious")),this._affectedEnd&&!this._affectedEnd.isBefore(e)||(this._affectedEnd&&this._affectedEnd.detach(),this._affectedEnd=ec.fromPosition(e,"toNext"))}_mergeOnLeft(){const e=this._firstNode;if(!(e instanceof Zs))return;if(!this._canMergeLeft(e))return;const t=ec._createBefore(e);t.stickiness="toNext";const i=ec.fromPosition(this.position,"toNext");this._affectedStart.isEqual(t)&&(this._affectedStart.detach(),this._affectedStart=ec._createAt(t.nodeBefore,"end","toPrevious")),this._firstNode===this._lastNode&&(this._firstNode=t.nodeBefore,this._lastNode=t.nodeBefore),this.writer.merge(t),t.isEqual(this._affectedEnd)&&this._firstNode===this._lastNode&&(this._affectedEnd.detach(),this._affectedEnd=ec._createAt(t.nodeBefore,"end","toNext")),this.position=i.toPosition(),i.detach(),this._filterAttributesOf.push(this.position.parent),t.detach()}_mergeOnRight(){const e=this._lastNode;if(!(e instanceof Zs))return;if(!this._canMergeRight(e))return;const t=ec._createAfter(e);if(t.stickiness="toNext",!this.position.isEqual(t))throw new l.a("insertcontent-invalid-insertion-position",this);this.position=ia._createAt(t.nodeBefore,"end");const i=ec.fromPosition(this.position,"toPrevious");this._affectedEnd.isEqual(t)&&(this._affectedEnd.detach(),this._affectedEnd=ec._createAt(t.nodeBefore,"end","toNext")),this._firstNode===this._lastNode&&(this._firstNode=t.nodeBefore,this._lastNode=t.nodeBefore),this.writer.merge(t),t.getShiftedBy(-1).isEqual(this._affectedStart)&&this._firstNode===this._lastNode&&(this._affectedStart.detach(),this._affectedStart=ec._createAt(t.nodeBefore,0,"toPrevious")),this.position=i.toPosition(),i.detach(),this._filterAttributesOf.push(this.position.parent),t.detach()}_canMergeLeft(e){const t=e.previousSibling;return t instanceof Zs&&this.canMergeWith.has(t)&&this.model.schema.checkMerge(t,e)}_canMergeRight(e){const t=e.nextSibling;return t instanceof Zs&&this.canMergeWith.has(t)&&this.model.schema.checkMerge(e,t)}_tryAutoparagraphing(e){const t=this.writer.createElement("paragraph");this._getAllowedIn(t,this.position.parent)&&this.schema.checkChild(t,e)&&(t._appendChild(e),this._handleNode(t))}_checkAndAutoParagraphToAllowedPosition(e){if(this.schema.checkChild(this.position.parent,e))return!0;if(!this.schema.checkChild(this.position.parent,"paragraph")||!this.schema.checkChild("paragraph",e))return!1;this._insertPartialFragment();const t=this.writer.createElement("paragraph");return this.writer.insert(t,this.position),this._setAffectedBoundaries(this.position),this._lastAutoParagraph=t,this.position=this.writer.createPositionAt(t,0),!0}_checkAndSplitToAllowedPosition(e){const t=this._getAllowedIn(e,this.position.parent);if(!t)return!1;for(t!=this.position.parent&&this._insertPartialFragment();t!=this.position.parent;){if(this.schema.isLimit(this.position.parent))return!1;if(this.position.isAtStart){const e=this.position.parent;this.position=this.writer.createPositionBefore(e),e.isEmpty&&e.parent===t&&this.writer.remove(e)}else if(this.position.isAtEnd)this.position=this.writer.createPositionAfter(this.position.parent);else{const e=this.writer.createPositionAfter(this.position.parent);this._setAffectedBoundaries(this.position),this.writer.split(this.position),this.position=e,this.canMergeWith.add(this.position.nodeAfter)}}return!0}_getAllowedIn(e,t){return this.schema.checkChild(t,e)?t:t.parent?this._getAllowedIn(e,t.parent):null}}function nc(e,t,i={}){if(t.isCollapsed)return;const o=t.getFirstRange();if("$graveyard"==o.root.rootName)return;const n=e.schema;e.change(e=>{if(!i.doNotResetEntireContent&&function(e,t){const i=e.getLimitElement(t);if(!t.containsEntireContent(i))return!1;const o=t.getFirstRange();if(o.start.parent==o.end.parent)return!1;return e.checkChild(i,"paragraph")}(n,t))return void function(e,t){const i=e.model.schema.getLimitElement(t);e.remove(e.createRangeIn(i)),sc(e,e.createPositionAt(i,0),t)}(e,t);const[r,s]=function(e){const t=e.root.document.model,i=e.start;let o=e.end;if(t.hasContent(e,{ignoreMarkers:!0})){const i=function(e){const t=e.parent,i=t.root.document.model.schema,o=t.getAncestors({parentFirst:!0,includeSelf:!0});for(const e of o){if(i.isLimit(e))return null;if(i.isBlock(e))return e}}(o);if(i&&o.isTouching(t.createPositionAt(i,0))){const i=t.createSelection(e);t.modifySelection(i,{direction:"backward"}),o=i.getLastPosition()}}return[ec.fromPosition(i,"toPrevious"),ec.fromPosition(o,"toNext")]}(o);r.isTouching(s)||e.remove(e.createRange(r,s)),i.leaveUnmerged||(!function(e,t,i){const o=e.model;if(!rc(e.model.schema,t,i))return;const[n,r]=function(e,t){const i=e.getAncestors(),o=t.getAncestors();let n=0;for(;i[n]&&i[n]==o[n];)n++;return[i[n],o[n]]}(t,i);if(!n||!r)return;!o.hasContent(n,{ignoreMarkers:!0})&&o.hasContent(r,{ignoreMarkers:!0})?function e(t,i,o,n){const r=i.parent,s=o.parent;if(r==n||s==n)return;i=t.createPositionAfter(r),(o=t.createPositionBefore(s)).isEqual(i)||t.insert(r,o);for(;i.parent.isEmpty;){const e=i.parent;i=t.createPositionBefore(e),t.remove(e)}if(o=t.createPositionBefore(s),function(e,t){const i=t.nodeBefore,o=t.nodeAfter;i.name!=o.name&&e.rename(i,o.name);e.clearAttributes(i),e.setAttributes(Object.fromEntries(o.getAttributes()),i),e.merge(t)}(t,o),!rc(t.model.schema,i,o))return;e(t,i,o,n)}(e,t,i,n.parent):function e(t,i,o,n){const r=i.parent,s=o.parent;if(r==n||s==n)return;i=t.createPositionAfter(r),(o=t.createPositionBefore(s)).isEqual(i)||t.insert(s,i);t.merge(i);for(;o.parent.isEmpty;){const e=o.parent;o=t.createPositionBefore(e),t.remove(e)}if(!rc(t.model.schema,i,o))return;e(t,i,o,n)}(e,t,i,n.parent)}(e,r,s),n.removeDisallowedAttributes(r.parent.getChildren(),e)),ac(e,t,r),!i.doNotAutoparagraph&&function(e,t){const i=e.checkChild(t,"$text"),o=e.checkChild(t,"paragraph");return!i&&o}(n,r)&&sc(e,r,t),r.detach(),s.detach()})}function rc(e,t,i){const o=t.parent,n=i.parent;return o!=n&&(!e.isLimit(o)&&!e.isLimit(n)&&function(e,t,i){const o=new sa(e,t);for(const e of o.getWalker())if(i.isLimit(e.item))return!1;return!0}(t,i,e))}function sc(e,t,i){const o=e.createElement("paragraph");e.insert(o,t),ac(e,i,e.createPositionAt(o,0))}function ac(e,t,i){t instanceof ya?e.setSelection(i):t.setTo(i)}function lc(e,t){const{isForward:i,walker:o,unit:n,schema:r}=e,{type:s,item:a,nextPosition:l}=t;if("text"==s)return"word"===e.unit?function(e,t){let i=e.position.textNode;if(i){let o=e.position.offset-i.startOffset;for(;!dc(i.data,o,t)&&!hc(i,o,t);){e.next();const n=t?e.position.nodeAfter:e.position.nodeBefore;if(n&&n.is("$text")){const o=n.data.charAt(t?0:n.data.length-1);' ,.?!:;"-()'.includes(o)||(e.next(),i=e.position.textNode)}o=e.position.offset-i.startOffset}}return e.position}(o,i):function(e,t){const i=e.position.textNode;if(i){const o=i.data;let n=e.position.offset-i.startOffset;for(;Ul(o,n)||"character"==t&&Kl(o,n);)e.next(),n=e.position.offset-i.startOffset}return e.position}(o,n);if(s==(i?"elementStart":"elementEnd")){if(r.isSelectable(a))return ia._createAt(a,i?"after":"before");if(r.checkChild(l,"$text"))return l}else{if(r.isLimit(a))return void o.skip(()=>!0);if(r.checkChild(l,"$text"))return l}}function cc(e,t){const i=e.root,o=ia._createAt(i,t?"end":0);return t?new sa(e,o):new sa(o,e)}function dc(e,t,i){const o=t+(i?0:-1);return' ,.?!:;"-()'.includes(e.charAt(o))}function hc(e,t,i){return t===(i?e.endOffset:0)}function uc(e,t){const i=[];Array.from(e.getItems({direction:"backward"})).map(e=>t.createRangeOn(e)).filter(t=>(t.start.isAfter(e.start)||t.start.isEqual(e.start))&&(t.end.isBefore(e.end)||t.end.isEqual(e.end))).forEach(e=>{i.push(e.start.parent),t.remove(e)}),i.forEach(e=>{let i=e;for(;i.parent&&i.isEmpty;){const e=t.createRangeOn(i);i=i.parent,t.remove(e)}})}function mc(e){e.document.registerPostFixer(t=>function(e,t){const i=t.document.selection,o=t.schema,n=[];let r=!1;for(const e of i.getRanges()){const t=gc(e,o);t&&!t.isEqual(e)?(n.push(t),r=!0):n.push(e)}r&&e.setSelection(function(e){const t=[];t.push(e.shift());for(const i of e){const e=t.pop();if(i.isEqual(e))t.push(e);else if(i.isIntersecting(e)){const o=e.start.isAfter(i.start)?i.start:e.start,n=e.end.isAfter(i.end)?e.end:i.end,r=new sa(o,n);t.push(r)}else t.push(e),t.push(i)}return t}(n),{backward:i.isBackward})}(t,e))}function gc(e,t){return e.isCollapsed?function(e,t){const i=e.start,o=t.getNearestSelectionRange(i);if(!o)return null;if(!o.isCollapsed)return o;const n=o.start;if(i.isEqual(n))return null;return new sa(n)}(e,t):function(e,t){const{start:i,end:o}=e,n=t.checkChild(i,"$text"),r=t.checkChild(o,"$text"),s=t.getLimitElement(i),a=t.getLimitElement(o);if(s===a){if(n&&r)return null;if(function(e,t,i){const o=e.nodeAfter&&!i.isLimit(e.nodeAfter)||i.checkChild(e,"$text"),n=t.nodeBefore&&!i.isLimit(t.nodeBefore)||i.checkChild(t,"$text");return o||n}(i,o,t)){const e=i.nodeAfter&&t.isSelectable(i.nodeAfter)?null:t.getNearestSelectionRange(i,"forward"),n=o.nodeBefore&&t.isSelectable(o.nodeBefore)?null:t.getNearestSelectionRange(o,"backward"),r=e?e.start:i,s=n?n.end:o;return new sa(r,s)}}const l=s&&!s.is("rootElement"),c=a&&!a.is("rootElement");if(l||c){const e=i.nodeAfter&&o.nodeBefore&&i.nodeAfter.parent===o.nodeBefore.parent,n=l&&(!e||!pc(i.nodeAfter,t)),r=c&&(!e||!pc(o.nodeBefore,t));let d=i,h=o;return n&&(d=ia._createBefore(fc(s,t))),r&&(h=ia._createAfter(fc(a,t))),new sa(d,h)}return null}(e,t)}function fc(e,t){let i=e,o=i;for(;t.isLimit(o)&&o.parent;)i=o,o=o.parent;return i}function pc(e,t){return e&&t.isSelectable(e)}class bc{constructor(){this.markers=new Yl,this.document=new Gl(this),this.schema=new Ga,this._pendingChanges=[],this._currentWriter=null,["insertContent","deleteContent","modifySelection","getSelectedContent","applyOperation"].forEach(e=>this.decorate(e)),this.on("applyOperation",(e,t)=>{t[0]._validate()},{priority:"highest"}),this.schema.register("$root",{isLimit:!0}),this.schema.register("$block",{allowIn:"$root",isBlock:!0}),this.schema.register("$text",{allowIn:"$block",isInline:!0,isContent:!0}),this.schema.register("$clipboardHolder",{allowContentOf:"$root",isLimit:!0}),this.schema.extend("$text",{allowIn:"$clipboardHolder"}),this.schema.register("$documentFragment",{allowContentOf:"$root",isLimit:!0}),this.schema.extend("$text",{allowIn:"$documentFragment"}),this.schema.register("$marker"),this.schema.addChildCheck((e,t)=>{if("$marker"===t.name)return!0}),mc(this),this.document.registerPostFixer(Oa)}change(e){try{return 0===this._pendingChanges.length?(this._pendingChanges.push({batch:new gl,callback:e}),this._runPendingChanges()[0]):e(this._currentWriter)}catch(e){l.a.rethrowUnexpectedError(e,this)}}enqueueChange(e,t){try{"string"==typeof e?e=new gl(e):"function"==typeof e&&(t=e,e=new gl),this._pendingChanges.push({batch:e,callback:t}),1==this._pendingChanges.length&&this._runPendingChanges()}catch(e){l.a.rethrowUnexpectedError(e,this)}}applyOperation(e){e._execute()}insertContent(e,t,i){return function(e,t,i,o){return e.change(n=>{let r;r=i?i instanceof ga||i instanceof ya?i:n.createSelection(i,o):e.document.selection,r.isCollapsed||e.deleteContent(r,{doNotAutoparagraph:!0});const s=new oc(e,n,r.anchor);let a;a=t.is("documentFragment")?t.getChildren():[t],s.handleNodes(a);const l=s.getSelectionRange();l&&(r instanceof ya?n.setSelection(l):r.setTo(l));const c=s.getAffectedRange()||e.createRange(r.anchor);return s.destroy(),c})}(this,e,t,i)}deleteContent(e,t){nc(this,e,t)}modifySelection(e,t){!function(e,t,i={}){const o=e.schema,n="backward"!=i.direction,r=i.unit?i.unit:"character",s=t.focus,a=new ea({boundaries:cc(s,n),singleCharacters:!0,direction:n?"forward":"backward"}),l={walker:a,schema:o,isForward:n,unit:r};let c;for(;c=a.next();){if(c.done)return;const i=lc(l,c.value);if(i)return void(t instanceof ya?e.change(e=>{e.setSelectionFocus(i)}):t.setFocus(i))}}(this,e,t)}getSelectedContent(e){return function(e,t){return e.change(e=>{const i=e.createDocumentFragment(),o=t.getFirstRange();if(!o||o.isCollapsed)return i;const n=o.start.root,r=o.start.getCommonPath(o.end),s=n.getNodeByPath(r);let a;a=o.start.parent==o.end.parent?o:e.createRange(e.createPositionAt(s,o.start.path[r.length]),e.createPositionAt(s,o.end.path[r.length]+1));const l=a.end.offset-a.start.offset;for(const t of a.getItems({shallow:!0}))t.is("$textProxy")?e.appendText(t.data,t.getAttributes(),i):e.append(e.cloneElement(t,!0),i);if(a!=o){const t=o._getTransformedByMove(a.start,e.createPositionAt(i,0),l)[0],n=e.createRange(e.createPositionAt(i,0),t.start);uc(e.createRange(t.end,e.createPositionAt(i,"end")),e),uc(n,e)}return i})}(this,e)}hasContent(e,t={}){const i=e instanceof Zs?sa._createIn(e):e;if(i.isCollapsed)return!1;const{ignoreWhitespaces:o=!1,ignoreMarkers:n=!1}=t;if(!n)for(const e of this.markers.getMarkersIntersectingRange(i))if(e.affectsData)return!0;for(const e of i.getItems())if(this.schema.isContent(e)){if(!e.is("$textProxy"))return!0;if(!o)return!0;if(-1!==e.data.search(/\S/))return!0}return!1}createPositionFromPath(e,t,i){return new ia(e,t,i)}createPositionAt(e,t){return ia._createAt(e,t)}createPositionAfter(e){return ia._createAfter(e)}createPositionBefore(e){return ia._createBefore(e)}createRange(e,t){return new sa(e,t)}createRangeIn(e){return sa._createIn(e)}createRangeOn(e){return sa._createOn(e)}createSelection(e,t,i){return new ga(e,t,i)}createBatch(e){return new gl(e)}createOperationFromJSON(e){return class{static fromJSON(e,t){return Zl[e.__className].fromJSON(e,t)}}.fromJSON(e,this.document)}destroy(){this.document.destroy(),this.stopListening()}_runPendingChanges(){const e=[];for(this.fire("_beforeChanges");this._pendingChanges.length;){const t=this._pendingChanges[0].batch;this._currentWriter=new Ml(this,t);const i=this._pendingChanges[0].callback(this._currentWriter);e.push(i),this.document._handleChangeBlock(this._currentWriter),this._pendingChanges.shift(),this._currentWriter=null}return this.fire("_afterChanges"),e}}Ye(bc,qe);class wc extends Ns{constructor(e){super(),this.editor=e}set(e,t,i={}){if("string"==typeof t){const e=t;t=(t,i)=>{this.editor.execute(e),i()}}super.set(e,t,i)}}class kc{constructor(e={}){this._context=e.context||new so({language:e.language}),this._context._addEditor(this,!e.context);const t=Array.from(this.constructor.builtinPlugins||[]);this.config=new Ji(e,this.constructor.defaultConfig),this.config.define("plugins",t),this.config.define(this._context._getEditorConfig()),this.plugins=new eo(this,t,this._context.plugins),this.locale=this._context.locale,this.t=this.locale.t,this.commands=new $a,this.set("state","initializing"),this.once("ready",()=>this.state="ready",{priority:"high"}),this.once("destroy",()=>this.state="destroyed",{priority:"high"}),this.set("isReadOnly",!1),this.model=new bc;const i=new Qo;this.data=new dl(this.model,i),this.editing=new qa(this.model,i),this.editing.view.document.bind("isReadOnly").to(this),this.conversion=new hl([this.editing.downcastDispatcher,this.data.downcastDispatcher],this.data.upcastDispatcher),this.conversion.addAlias("dataDowncast",this.data.downcastDispatcher),this.conversion.addAlias("editingDowncast",this.editing.downcastDispatcher),this.keystrokes=new wc(this),this.keystrokes.listenTo(this.editing.view.document)}initPlugins(){const e=this.config,t=e.get("plugins"),i=e.get("removePlugins")||[],o=e.get("extraPlugins")||[],n=e.get("substitutePlugins")||[];return this.plugins.init(t.concat(o),i,n)}destroy(){let e=Promise.resolve();return"initializing"==this.state&&(e=new Promise(e=>this.once("ready",e))),e.then(()=>{this.fire("destroy"),this.stopListening(),this.commands.destroy()}).then(()=>this.plugins.destroy()).then(()=>{this.model.destroy(),this.data.destroy(),this.editing.destroy(),this.keystrokes.destroy()}).then(()=>this._context._removeEditor(this))}execute(...e){try{return this.commands.execute(...e)}catch(e){l.a.rethrowUnexpectedError(e,this)}}focus(){this.editing.view.focus()}}Ye(kc,qe);class _c{constructor(e){this.editor=e,this._components=new Map}*names(){for(const e of this._components.values())yield e.originalName}add(e,t){this._components.set(vc(e),{callback:t,originalName:e})}create(e){if(!this.has(e))throw new l.a("componentfactory-item-missing",this,{name:e});return this._components.get(vc(e)).callback(this.editor.locale)}has(e){return this._components.has(vc(e))}}function vc(e){return String(e).toLowerCase()}class yc{constructor(e){this.editor=e,this.componentFactory=new _c(e),this.focusTracker=new Ms,this._editableElementsMap=new Map,this.listenTo(e.editing.view.document,"layoutChanged",()=>this.update())}get element(){return null}update(){this.fire("update")}destroy(){this.stopListening(),this.focusTracker.destroy();for(const e of this._editableElementsMap.values())e.ckeditorInstance=null;this._editableElementsMap=new Map}setEditableElement(e,t){this._editableElementsMap.set(e,t),t.ckeditorInstance||(t.ckeditorInstance=this.editor)}getEditableElement(e="main"){return this._editableElementsMap.get(e)}getEditableElementsNames(){return this._editableElementsMap.keys()}get _editableElements(){return console.warn("editor-ui-deprecated-editable-elements: The EditorUI#_editableElements property has been deprecated and will be removed in the near future.",{editorUI:this}),this._editableElementsMap}}Ye(yc,h);var xc={setData(e){this.data.set(e)},getData(e){return this.data.get(e)}};var Cc={updateSourceElement(){if(!this.sourceElement)throw new l.a("editor-missing-sourceelement",this);Vs(this.sourceElement,this.data.get())}};class Ac extends ao{static get pluginName(){return"PendingActions"}init(){this.set("hasAny",!1),this._actions=new Zi({idProperty:"_id"}),this._actions.delegate("add","remove").to(this)}add(e){if("string"!=typeof e)throw new l.a("pendingactions-add-invalid-message",this);const t=Object.create(qe);return t.set("message",e),this._actions.add(t),this.hasAny=!0,t}remove(e){this._actions.remove(e),this.hasAny=!!this._actions.length}get first(){return this._actions.get(0)}[Symbol.iterator](){return this._actions[Symbol.iterator]()}}var Tc='',Ec='';const Pc=Tc,Sc=Ec,Rc='',Ic='',Vc='',zc='',Oc='',Mc='',Nc='',Bc='',Fc='',Dc='',Lc='',Hc='',jc='',Wc='',qc='',$c='',Uc='',Kc='',Gc='',Jc='',Yc='',Qc='';function Xc({emitter:e,activator:t,callback:i,contextElements:o}){e.listenTo(document,"mousedown",(e,n)=>{if(!t())return;const r="function"==typeof n.composedPath?n.composedPath():[];for(const e of o)if(e.contains(n.target)||r.includes(e))return;i()})}function Zc(e){e.set("_isCssTransitionsDisabled",!1),e.disableCssTransitions=()=>{e._isCssTransitionsDisabled=!0},e.enableCssTransitions=()=>{e._isCssTransitionsDisabled=!1},e.extendTemplate({attributes:{class:[e.bindTemplate.if("_isCssTransitionsDisabled","ck-transitions-disabled")]}})}function ed({view:e}){e.listenTo(e.element,"submit",(t,i)=>{i.preventDefault(),e.fire("submit")},{useCapture:!0})}class td extends Zi{constructor(e=[]){super(e,{idProperty:"viewUid"}),this.on("add",(e,t,i)=>{this._renderViewIntoCollectionParent(t,i)}),this.on("remove",(e,t)=>{t.element&&this._parentElement&&t.element.remove()}),this._parentElement=null}destroy(){this.map(e=>e.destroy())}setParent(e){this._parentElement=e;for(const e of this)this._renderViewIntoCollectionParent(e)}delegate(...e){if(!e.length||!e.every(e=>"string"==typeof e))throw new l.a("ui-viewcollection-delegate-wrong-events",this);return{to:t=>{for(const i of this)for(const o of e)i.delegate(o).to(t);this.on("add",(i,o)=>{for(const i of e)o.delegate(i).to(t)}),this.on("remove",(i,o)=>{for(const i of e)o.stopDelegating(i,t)})}}}_renderViewIntoCollectionParent(e,t){e.isRendered||e.render(),e.element&&this._parentElement&&this._parentElement.insertBefore(e.element,this._parentElement.children[t])}}i(17);class id{constructor(e){this.element=null,this.isRendered=!1,this.locale=e,this.t=e&&e.t,this._viewCollections=new Zi,this._unboundChildren=this.createCollection(),this._viewCollections.on("add",(t,i)=>{i.locale=e}),this.decorate("render")}get bindTemplate(){return this._bindTemplate?this._bindTemplate:this._bindTemplate=od.bind(this,this)}createCollection(e){const t=new td(e);return this._viewCollections.add(t),t}registerChild(e){Xi(e)||(e=[e]);for(const t of e)this._unboundChildren.add(t)}deregisterChild(e){Xi(e)||(e=[e]);for(const t of e)this._unboundChildren.remove(t)}setTemplate(e){this.template=new od(e)}extendTemplate(e){od.extend(this.template,e)}render(){if(this.isRendered)throw new l.a("ui-view-render-already-rendered",this);this.template&&(this.element=this.template.render(),this.registerChild(this.template.getViews())),this.isRendered=!0}destroy(){this.stopListening(),this._viewCollections.map(e=>e.destroy()),this.template&&this.template._revertData&&this.template.revert(this.element)}}Ye(id,Vr),Ye(id,qe);class od{constructor(e){Object.assign(this,md(ud(e))),this._isRendered=!1,this._revertData=null}render(){const e=this._renderNode({intoFragment:!0});return this._isRendered=!0,e}apply(e){return this._revertData={children:[],bindings:[],attributes:{}},this._renderNode({node:e,isApplying:!0,revertData:this._revertData}),e}revert(e){if(!this._revertData)throw new l.a("ui-template-revert-not-applied",[this,e]);this._revertTemplateFromNode(e,this._revertData)}*getViews(){yield*function*e(t){if(t.children)for(const i of t.children)wd(i)?yield i:kd(i)&&(yield*e(i))}(this)}static bind(e,t){return{to:(i,o)=>new rd({eventNameOrFunction:i,attribute:i,observable:e,emitter:t,callback:o}),if:(i,o,n)=>new sd({observable:e,emitter:t,attribute:i,valueIfTrue:o,callback:n})}}static extend(e,t){if(e._isRendered)throw new l.a("template-extend-render",[this,e]);!function e(t,i){i.attributes&&(t.attributes||(t.attributes={}),pd(t.attributes,i.attributes));i.eventListeners&&(t.eventListeners||(t.eventListeners={}),pd(t.eventListeners,i.eventListeners));i.text&&t.text.push(...i.text);if(i.children&&i.children.length){if(t.children.length!=i.children.length)throw new l.a("ui-template-extend-children-mismatch",t);let o=0;for(const n of i.children)e(t.children[o++],n)}}(e,md(ud(t)))}_renderNode(e){let t;if(t=e.node?this.tag&&this.text:this.tag?this.text:!this.text,t)throw new l.a("ui-template-wrong-syntax",this);return this.text?this._renderText(e):this._renderElement(e)}_renderElement(e){let t=e.node;return t||(t=e.node=document.createElementNS(this.ns||"http://www.w3.org/1999/xhtml",this.tag)),this._renderAttributes(e),this._renderElementChildren(e),this._setUpListeners(e),t}_renderText(e){let t=e.node;return t?e.revertData.text=t.textContent:t=e.node=document.createTextNode(""),ad(this.text)?this._bindToObservable({schema:this.text,updater:cd(t),data:e}):t.textContent=this.text.join(""),t}_renderAttributes(e){let t,i,o,n;if(!this.attributes)return;const r=e.node,s=e.revertData;for(t in this.attributes)if(o=r.getAttribute(t),i=this.attributes[t],s&&(s.attributes[t]=o),n=w(i[0])&&i[0].ns?i[0].ns:null,ad(i)){const a=n?i[0].value:i;s&&vd(t)&&a.unshift(o),this._bindToObservable({schema:a,updater:dd(r,t,n),data:e})}else"style"==t&&"string"!=typeof i[0]?this._renderStyleAttribute(i[0],e):(s&&o&&vd(t)&&i.unshift(o),i=i.map(e=>e&&e.value||e).reduce((e,t)=>e.concat(t),[]).reduce(fd,""),bd(i)||r.setAttributeNS(n,t,i))}_renderStyleAttribute(e,t){const i=t.node;for(const o in e){const n=e[o];ad(n)?this._bindToObservable({schema:[n],updater:hd(i,o),data:t}):i.style[o]=n}}_renderElementChildren(e){const t=e.node,i=e.intoFragment?document.createDocumentFragment():t,o=e.isApplying;let n=0;for(const r of this.children)if(_d(r)){if(!o){r.setParent(t);for(const e of r)i.appendChild(e.element)}}else if(wd(r))o||(r.isRendered||r.render(),i.appendChild(r.element));else if(pr(r))i.appendChild(r);else if(o){const t={children:[],bindings:[],attributes:{}};e.revertData.children.push(t),r._renderNode({node:i.childNodes[n++],isApplying:!0,revertData:t})}else i.appendChild(r.render());e.intoFragment&&t.appendChild(i)}_setUpListeners(e){if(this.eventListeners)for(const t in this.eventListeners){const i=this.eventListeners[t].map(i=>{const[o,n]=t.split("@");return i.activateDomEventListener(o,n,e)});e.revertData&&e.revertData.bindings.push(i)}}_bindToObservable({schema:e,updater:t,data:i}){const o=i.revertData;ld(e,t,i);const n=e.filter(e=>!bd(e)).filter(e=>e.observable).map(o=>o.activateAttributeListener(e,t,i));o&&o.bindings.push(n)}_revertTemplateFromNode(e,t){for(const e of t.bindings)for(const t of e)t();if(t.text)e.textContent=t.text;else{for(const i in t.attributes){const o=t.attributes[i];null===o?e.removeAttribute(i):e.setAttribute(i,o)}for(let i=0;ild(e,t,i);return this.emitter.listenTo(this.observable,"change:"+this.attribute,o),()=>{this.emitter.stopListening(this.observable,"change:"+this.attribute,o)}}}class rd extends nd{activateDomEventListener(e,t,i){const o=(e,i)=>{t&&!i.target.matches(t)||("function"==typeof this.eventNameOrFunction?this.eventNameOrFunction(i):this.observable.fire(this.eventNameOrFunction,i))};return this.emitter.listenTo(i.node,e,o),()=>{this.emitter.stopListening(i.node,e,o)}}}class sd extends nd{getValue(e){return!bd(super.getValue(e))&&(this.valueIfTrue||!0)}}function ad(e){return!!e&&(e.value&&(e=e.value),Array.isArray(e)?e.some(ad):e instanceof nd)}function ld(e,t,{node:i}){let o=function(e,t){return e.map(e=>e instanceof nd?e.getValue(t):e)}(e,i);o=1==e.length&&e[0]instanceof sd?o[0]:o.reduce(fd,""),bd(o)?t.remove():t.set(o)}function cd(e){return{set(t){e.textContent=t},remove(){e.textContent=""}}}function dd(e,t,i){return{set(o){e.setAttributeNS(i,t,o)},remove(){e.removeAttributeNS(i,t)}}}function hd(e,t){return{set(i){e.style[t]=i},remove(){e.style[t]=null}}}function ud(e){return Ki(e,e=>{if(e&&(e instanceof nd||kd(e)||wd(e)||_d(e)))return e})}function md(e){if("string"==typeof e?e=function(e){return{text:[e]}}(e):e.text&&function(e){e.text=to(e.text)}(e),e.on&&(e.eventListeners=function(e){for(const t in e)gd(e,t);return e}(e.on),delete e.on),!e.text){e.attributes&&function(e){for(const t in e)e[t].value&&(e[t].value=to(e[t].value)),gd(e,t)}(e.attributes);const t=[];if(e.children)if(_d(e.children))t.push(e.children);else for(const i of e.children)kd(i)||wd(i)||pr(i)?t.push(i):t.push(new od(i));e.children=t}return e}function gd(e,t){e[t]=to(e[t])}function fd(e,t){return bd(t)?e:bd(e)?t:`${e} ${t}`}function pd(e,t){for(const i in t)e[i]?e[i].push(...t[i]):e[i]=t[i]}function bd(e){return!e&&0!==e}function wd(e){return e instanceof id}function kd(e){return e instanceof od}function _d(e){return e instanceof td}function vd(e){return"class"==e||"style"==e}class yd extends td{constructor(e,t=[]){super(t),this.locale=e}attachToDom(){this._bodyCollectionContainer=new od({tag:"div",attributes:{class:["ck","ck-reset_all","ck-body","ck-rounded-corners"],dir:this.locale.uiLanguageDirection},children:this}).render();let e=document.querySelector(".ck-body-wrapper");e||(e=xs(document,"div",{class:"ck-body-wrapper"}),document.body.appendChild(e)),e.appendChild(this._bodyCollectionContainer)}detachFromDom(){super.destroy(),this._bodyCollectionContainer&&this._bodyCollectionContainer.remove();const e=document.querySelector(".ck-body-wrapper");e&&0==e.childElementCount&&e.remove()}}i(19);class xd extends id{constructor(){super();const e=this.bindTemplate;this.set("content",""),this.set("viewBox","0 0 20 20"),this.set("fillColor",""),this.setTemplate({tag:"svg",ns:"http://www.w3.org/2000/svg",attributes:{class:["ck","ck-icon"],viewBox:e.to("viewBox")}})}render(){super.render(),this._updateXMLContent(),this._colorFillPaths(),this.on("change:content",()=>{this._updateXMLContent(),this._colorFillPaths()}),this.on("change:fillColor",()=>{this._colorFillPaths()})}_updateXMLContent(){if(this.content){const e=(new DOMParser).parseFromString(this.content.trim(),"image/svg+xml").querySelector("svg"),t=e.getAttribute("viewBox");for(t&&(this.viewBox=t),this.element.innerHTML="";e.childNodes.length>0;)this.element.appendChild(e.childNodes[0])}}_colorFillPaths(){this.fillColor&&this.element.querySelectorAll(".ck-icon__fill").forEach(e=>{e.style.fill=this.fillColor})}}i(21);class Cd extends id{constructor(e){super(e),this.set("text",""),this.set("position","s");const t=this.bindTemplate;this.setTemplate({tag:"span",attributes:{class:["ck","ck-tooltip",t.to("position",e=>"ck-tooltip_"+e),t.if("text","ck-hidden",e=>!e.trim())]},children:[{tag:"span",attributes:{class:["ck","ck-tooltip__text"]},children:[{text:t.to("text")}]}]})}}i(23);class Ad extends id{constructor(e){super(e);const t=this.bindTemplate,i=s();this.set("class"),this.set("labelStyle"),this.set("icon"),this.set("isEnabled",!0),this.set("isOn",!1),this.set("isVisible",!0),this.set("isToggleable",!1),this.set("keystroke"),this.set("label"),this.set("tabindex",-1),this.set("tooltip"),this.set("tooltipPosition","s"),this.set("type","button"),this.set("withText",!1),this.set("withKeystroke",!1),this.children=this.createCollection(),this.tooltipView=this._createTooltipView(),this.labelView=this._createLabelView(i),this.iconView=new xd,this.iconView.extendTemplate({attributes:{class:"ck-button__icon"}}),this.keystrokeView=this._createKeystrokeView(),this.bind("_tooltipString").to(this,"tooltip",this,"label",this,"keystroke",this._getTooltipString.bind(this)),this.setTemplate({tag:"button",attributes:{class:["ck","ck-button",t.to("class"),t.if("isEnabled","ck-disabled",e=>!e),t.if("isVisible","ck-hidden",e=>!e),t.to("isOn",e=>e?"ck-on":"ck-off"),t.if("withText","ck-button_with-text"),t.if("withKeystroke","ck-button_with-keystroke")],type:t.to("type",e=>e||"button"),tabindex:t.to("tabindex"),"aria-labelledby":"ck-editor__aria-label_"+i,"aria-disabled":t.if("isEnabled",!0,e=>!e),"aria-pressed":t.to("isOn",e=>!!this.isToggleable&&String(e))},children:this.children,on:{mousedown:t.to(e=>{e.preventDefault()}),click:t.to(e=>{this.isEnabled?this.fire("execute"):e.preventDefault()})}})}render(){super.render(),this.icon&&(this.iconView.bind("content").to(this,"icon"),this.children.add(this.iconView)),this.children.add(this.tooltipView),this.children.add(this.labelView),this.withKeystroke&&this.children.add(this.keystrokeView)}focus(){this.element.focus()}_createTooltipView(){const e=new Cd;return e.bind("text").to(this,"_tooltipString"),e.bind("position").to(this,"tooltipPosition"),e}_createLabelView(e){const t=new id,i=this.bindTemplate;return t.setTemplate({tag:"span",attributes:{class:["ck","ck-button__label"],style:i.to("labelStyle"),id:"ck-editor__aria-label_"+e},children:[{text:this.bindTemplate.to("label")}]}),t}_createKeystrokeView(){const e=new id;return e.setTemplate({tag:"span",attributes:{class:["ck","ck-button__keystroke"]},children:[{text:this.bindTemplate.to("keystroke",e=>Nn(e))}]}),e}_getTooltipString(e,t,i){return e?"string"==typeof e?e:(i&&(i=Nn(i)),e instanceof Function?e(t,i):`${t}${i?` (${i})`:""}`):""}}i(25);class Td extends Ad{constructor(e){super(e),this.isToggleable=!0,this.toggleSwitchView=this._createToggleView(),this.extendTemplate({attributes:{class:"ck-switchbutton"}})}render(){super.render(),this.children.add(this.toggleSwitchView)}_createToggleView(){const e=new id;return e.setTemplate({tag:"span",attributes:{class:["ck","ck-button__toggle"]},children:[{tag:"span",attributes:{class:["ck","ck-button__toggle__inner"]}}]}),e}}function Ed(e,t){const i=e.t,o={Black:i("Black"),"Dim grey":i("Dim grey"),Grey:i("Grey"),"Light grey":i("Light grey"),White:i("White"),Red:i("Red"),Orange:i("Orange"),Yellow:i("Yellow"),"Light green":i("Light green"),Green:i("Green"),Aquamarine:i("Aquamarine"),Turquoise:i("Turquoise"),"Light blue":i("Light blue"),Blue:i("Blue"),Purple:i("Purple")};return t.map(e=>{const t=o[e.label];return t&&t!=e.label&&(e.label=t),e})}function Pd(e){return e.map(Sd).filter(e=>!!e)}function Sd(e){return"string"==typeof e?{model:e,label:e,hasBorder:!1,view:{name:"span",styles:{color:e}}}:{model:e.color,label:e.label||e.color,hasBorder:void 0!==e.hasBorder&&e.hasBorder,view:{name:"span",styles:{color:""+e.color}}}}class Rd extends Ad{constructor(e){super(e);const t=this.bindTemplate;this.set("color"),this.set("hasBorder"),this.icon='',this.extendTemplate({attributes:{style:{backgroundColor:t.to("color")},class:["ck","ck-color-grid__tile",t.if("hasBorder","ck-color-table__color-tile_bordered")]}})}render(){super.render(),this.iconView.fillColor="hsl(0, 0%, 100%)"}}class Id{constructor(e){if(Object.assign(this,e),e.actions&&e.keystrokeHandler)for(const t in e.actions){let i=e.actions[t];"string"==typeof i&&(i=[i]);for(const o of i)e.keystrokeHandler.set(o,(e,i)=>{this[t](),i()})}}get first(){return this.focusables.find(Vd)||null}get last(){return this.focusables.filter(Vd).slice(-1)[0]||null}get next(){return this._getFocusableItem(1)}get previous(){return this._getFocusableItem(-1)}get current(){let e=null;return null===this.focusTracker.focusedElement?null:(this.focusables.find((t,i)=>{const o=t.element===this.focusTracker.focusedElement;return o&&(e=i),o}),e)}focusFirst(){this._focus(this.first)}focusLast(){this._focus(this.last)}focusNext(){this._focus(this.next)}focusPrevious(){this._focus(this.previous)}_focus(e){e&&e.focus()}_getFocusableItem(e){const t=this.current,i=this.focusables.length;if(!i)return null;if(null===t)return this[1===e?"first":"last"];let o=(t+i+e)%i;do{const t=this.focusables.get(o);if(Vd(t))return t;o=(o+i+e)%i}while(o!==t);return null}}function Vd(e){return!(!e.focus||"none"==vr.window.getComputedStyle(e.element).display)}i(27);class zd extends id{constructor(e,t){super(e);const i=t&&t.colorDefinitions||[],o={};t&&t.columns&&(o.gridTemplateColumns=`repeat( ${t.columns}, 1fr)`),this.set("selectedColor"),this.items=this.createCollection(),this.focusTracker=new Ms,this.keystrokes=new Ns,this._focusCycler=new Id({focusables:this.items,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"arrowleft",focusNext:"arrowright"}}),this.items.on("add",(e,t)=>{t.isOn=t.color===this.selectedColor}),i.forEach(e=>{const t=new Rd;t.set({color:e.color,label:e.label,tooltip:!0,hasBorder:e.options.hasBorder}),t.on("execute",()=>{this.fire("execute",{value:e.color,hasBorder:e.options.hasBorder,label:e.label})}),this.items.add(t)}),this.setTemplate({tag:"div",children:this.items,attributes:{class:["ck","ck-color-grid"],style:o}}),this.on("change:selectedColor",(e,t,i)=>{for(const e of this.items)e.isOn=e.color===i})}focus(){this.items.length&&this.items.first.focus()}focusLast(){this.items.length&&this.items.last.focus()}render(){super.render();for(const e of this.items)this.focusTracker.add(e.element);this.items.on("add",(e,t)=>{this.focusTracker.add(t.element)}),this.items.on("remove",(e,t)=>{this.focusTracker.remove(t.element)}),this.keystrokes.listenTo(this.element)}}var Od='';class Md extends Ad{constructor(e){super(e),this.arrowView=this._createArrowView(),this.extendTemplate({attributes:{"aria-haspopup":!0}}),this.delegate("execute").to(this,"open")}render(){super.render(),this.children.add(this.arrowView)}_createArrowView(){const e=new xd;return e.content=Od,e.extendTemplate({attributes:{class:"ck-dropdown__arrow"}}),e}}i(29);class Nd extends id{constructor(e){super(e);const t=this.bindTemplate;this.set("icon"),this.set("isEnabled",!0),this.set("isOn",!1),this.set("isToggleable",!1),this.set("isVisible",!0),this.set("keystroke"),this.set("label"),this.set("tabindex",-1),this.set("tooltip"),this.set("tooltipPosition","s"),this.set("type","button"),this.set("withText",!1),this.children=this.createCollection(),this.actionView=this._createActionView(),this.arrowView=this._createArrowView(),this.keystrokes=new Ns,this.focusTracker=new Ms,this.setTemplate({tag:"div",attributes:{class:["ck","ck-splitbutton",t.if("isVisible","ck-hidden",e=>!e),this.arrowView.bindTemplate.if("isOn","ck-splitbutton_open")]},children:this.children})}render(){super.render(),this.children.add(this.actionView),this.children.add(this.arrowView),this.focusTracker.add(this.actionView.element),this.focusTracker.add(this.arrowView.element),this.keystrokes.listenTo(this.element),this.keystrokes.set("arrowright",(e,t)=>{this.focusTracker.focusedElement===this.actionView.element&&(this.arrowView.focus(),t())}),this.keystrokes.set("arrowleft",(e,t)=>{this.focusTracker.focusedElement===this.arrowView.element&&(this.actionView.focus(),t())})}focus(){this.actionView.focus()}_createActionView(){const e=new Ad;return e.bind("icon","isEnabled","isOn","isToggleable","keystroke","label","tabindex","tooltip","tooltipPosition","type","withText").to(this),e.extendTemplate({attributes:{class:"ck-splitbutton__action"}}),e.delegate("execute").to(this),e}_createArrowView(){const e=new Ad,t=e.bindTemplate;return e.icon=Od,e.extendTemplate({attributes:{class:"ck-splitbutton__arrow","aria-haspopup":!0,"aria-expanded":t.to("isOn",e=>String(e))}}),e.bind("isEnabled").to(this),e.delegate("execute").to(this,"open"),e}}class Bd extends id{constructor(e){super(e);const t=this.bindTemplate;this.set("isVisible",!1),this.set("position","se"),this.children=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-reset","ck-dropdown__panel",t.to("position",e=>"ck-dropdown__panel_"+e),t.if("isVisible","ck-dropdown__panel-visible")]},children:this.children,on:{selectstart:t.to(e=>e.preventDefault())}})}focus(){this.children.length&&this.children.first.focus()}focusLast(){if(this.children.length){const e=this.children.last;"function"==typeof e.focusLast?e.focusLast():e.focus()}}}i(31);function Fd({element:e,target:t,positions:i,limiter:o,fitInViewport:n}){I(t)&&(t=t()),I(o)&&(o=o());const r=function(e){return e&&e.parentNode?e.offsetParent===vr.document.body?null:e.offsetParent:null}(e),s=new Es(e),a=new Es(t);let l,c;if(o||n){const e=function(e,t){const{elementRect:i,viewportRect:o}=t,n=i.getArea(),r=function(e,{targetRect:t,elementRect:i,limiterRect:o,viewportRect:n}){const r=[],s=i.getArea();for(const a of e){const e=Dd(a,t,i);if(!e)continue;const[l,c]=e;let d=0,h=0;if(o)if(n){const e=o.getIntersection(n);e&&(d=e.getIntersectionArea(c))}else d=o.getIntersectionArea(c);n&&(h=n.getIntersectionArea(c));const u={positionName:l,positionRect:c,limiterIntersectArea:d,viewportIntersectArea:h};if(d===s)return[u];r.push(u)}return r}(e,t);if(o){const e=Ld(r.filter(({viewportIntersectArea:e})=>e===n),n);if(e)return e}return Ld(r,n)}(i,{targetRect:a,elementRect:s,limiterRect:o&&new Es(o).getVisible(),viewportRect:n&&new Es(vr.window)});[c,l]=e||Dd(i[0],a,s)}else[c,l]=Dd(i[0],a,s);let d=Hd(l);return r&&(d=function({left:e,top:t},i){const o=Hd(new Es(i)),n=As(i);return e-=o.left,t-=o.top,e+=i.scrollLeft,t+=i.scrollTop,e-=n.left,t-=n.top,{left:e,top:t}}(d,r)),{left:d.left,top:d.top,name:c}}function Dd(e,t,i){const o=e(t,i);if(!o)return null;const{left:n,top:r,name:s}=o;return[s,i.clone().moveTo(n,r)]}function Ld(e,t){let i,o,n=0;for(const{positionName:r,positionRect:s,limiterIntersectArea:a,viewportIntersectArea:l}of e){if(a===t)return[r,s];const e=l**2+a**2;e>n&&(n=e,i=s,o=r)}return i?[o,i]:null}function Hd({left:e,top:t}){const{scrollX:i,scrollY:o}=vr.window;return{left:e+i,top:t+o}}class jd extends id{constructor(e,t,i){super(e);const o=this.bindTemplate;this.buttonView=t,this.panelView=i,this.set("isOpen",!1),this.set("isEnabled",!0),this.set("class"),this.set("id"),this.set("panelPosition","auto"),this.keystrokes=new Ns,this.setTemplate({tag:"div",attributes:{class:["ck","ck-dropdown",o.to("class"),o.if("isEnabled","ck-disabled",e=>!e)],id:o.to("id"),"aria-describedby":o.to("ariaDescribedById")},children:[t,i]}),t.extendTemplate({attributes:{class:["ck-dropdown__button"]}})}render(){super.render(),this.listenTo(this.buttonView,"open",()=>{this.isOpen=!this.isOpen}),this.panelView.bind("isVisible").to(this,"isOpen"),this.on("change:isOpen",()=>{this.isOpen&&("auto"===this.panelPosition?this.panelView.position=jd._getOptimalPosition({element:this.panelView.element,target:this.buttonView.element,fitInViewport:!0,positions:this._panelPositions}).name:this.panelView.position=this.panelPosition)}),this.keystrokes.listenTo(this.element);const e=(e,t)=>{this.isOpen&&(this.buttonView.focus(),this.isOpen=!1,t())};this.keystrokes.set("arrowdown",(e,t)=>{this.buttonView.isEnabled&&!this.isOpen&&(this.isOpen=!0,t())}),this.keystrokes.set("arrowright",(e,t)=>{this.isOpen&&t()}),this.keystrokes.set("arrowleft",e),this.keystrokes.set("esc",e)}focus(){this.buttonView.focus()}get _panelPositions(){const{south:e,north:t,southEast:i,southWest:o,northEast:n,northWest:r,southMiddleEast:s,southMiddleWest:a,northMiddleEast:l,northMiddleWest:c}=jd.defaultPanelPositions;return"rtl"!==this.locale.uiLanguageDirection?[i,o,s,a,e,n,r,l,c,t]:[o,i,a,s,e,r,n,c,l,t]}}jd.defaultPanelPositions={south:(e,t)=>({top:e.bottom,left:e.left-(t.width-e.width)/2,name:"s"}),southEast:e=>({top:e.bottom,left:e.left,name:"se"}),southWest:(e,t)=>({top:e.bottom,left:e.left-t.width+e.width,name:"sw"}),southMiddleEast:(e,t)=>({top:e.bottom,left:e.left-(t.width-e.width)/4,name:"sme"}),southMiddleWest:(e,t)=>({top:e.bottom,left:e.left-3*(t.width-e.width)/4,name:"smw"}),north:(e,t)=>({top:e.top-t.height,left:e.left-(t.width-e.width)/2,name:"n"}),northEast:(e,t)=>({top:e.top-t.height,left:e.left,name:"ne"}),northWest:(e,t)=>({top:e.top-t.height,left:e.left-t.width+e.width,name:"nw"}),northMiddleEast:(e,t)=>({top:e.top-t.height,left:e.left-(t.width-e.width)/4,name:"nme"}),northMiddleWest:(e,t)=>({top:e.top-t.height,left:e.left-3*(t.width-e.width)/4,name:"nmw"})},jd._getOptimalPosition=Fd;class Wd extends id{constructor(e){super(e),this.setTemplate({tag:"span",attributes:{class:["ck","ck-toolbar__separator"]}})}}class qd extends id{constructor(e){super(e),this.setTemplate({tag:"span",attributes:{class:["ck","ck-toolbar__line-break"]}})}}function $d(e){return Array.isArray(e)?{items:e,removeItems:[]}:e?Object.assign({items:[],removeItems:[]},e):{items:[],removeItems:[]}}i(33);class Ud extends id{constructor(e,t){super(e);const i=this.bindTemplate,o=this.t;this.options=t||{},this.set("ariaLabel",o("Editor toolbar")),this.set("maxWidth","auto"),this.items=this.createCollection(),this.focusTracker=new Ms,this.keystrokes=new Ns,this.set("class"),this.set("isCompact",!1),this.itemsView=new Kd(e),this.children=this.createCollection(),this.children.add(this.itemsView),this.focusables=this.createCollection(),this._focusCycler=new Id({focusables:this.focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:["arrowleft","arrowup"],focusNext:["arrowright","arrowdown"]}});const n=["ck","ck-toolbar",i.to("class"),i.if("isCompact","ck-toolbar_compact")];var r;this.options.shouldGroupWhenFull&&this.options.isFloating&&n.push("ck-toolbar_floating"),this.setTemplate({tag:"div",attributes:{class:n,role:"toolbar","aria-label":i.to("ariaLabel"),style:{maxWidth:i.to("maxWidth")}},children:this.children,on:{mousedown:(r=this,r.bindTemplate.to(e=>{e.target===r.element&&e.preventDefault()}))}}),this._behavior=this.options.shouldGroupWhenFull?new Jd(this):new Gd(this)}render(){super.render();for(const e of this.items)this.focusTracker.add(e.element);this.items.on("add",(e,t)=>{this.focusTracker.add(t.element)}),this.items.on("remove",(e,t)=>{this.focusTracker.remove(t.element)}),this.keystrokes.listenTo(this.element),this._behavior.render(this)}destroy(){return this._behavior.destroy(),super.destroy()}focus(){this._focusCycler.focusFirst()}focusLast(){this._focusCycler.focusLast()}fillFromConfig(e,t){const i=$d(e),o=i.items.filter((e,o,n)=>"|"===e||-1===i.removeItems.indexOf(e)&&("-"===e?!this.options.shouldGroupWhenFull||(Object(l.b)("toolbarview-line-break-ignored-when-grouping-items",n),!1):!!t.has(e)||(Object(l.b)("toolbarview-item-unavailable",{name:e}),!1))),n=this._cleanSeparators(o).map(e=>"|"===e?new Wd:"-"===e?new qd:t.create(e));this.items.addMany(n)}_cleanSeparators(e){const t=e=>"-"!==e&&"|"!==e,i=e.length,o=e.findIndex(t),n=i-e.slice().reverse().findIndex(t);return e.slice(o,n).filter((e,i,o)=>{if(t(e))return!0;return!(i>0&&o[i-1]===e)})}}class Kd extends id{constructor(e){super(e),this.children=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-toolbar__items"]},children:this.children})}}class Gd{constructor(e){const t=e.bindTemplate;e.set("isVertical",!1),e.itemsView.children.bindTo(e.items).using(e=>e),e.focusables.bindTo(e.items).using(e=>e),e.extendTemplate({attributes:{class:[t.if("isVertical","ck-toolbar_vertical")]}})}render(){}destroy(){}}class Jd{constructor(e){this.view=e,this.viewChildren=e.children,this.viewFocusables=e.focusables,this.viewItemsView=e.itemsView,this.viewFocusTracker=e.focusTracker,this.viewLocale=e.locale,this.ungroupedItems=e.createCollection(),this.groupedItems=e.createCollection(),this.groupedItemsDropdown=this._createGroupedItemsDropdown(),this.resizeObserver=null,this.cachedPadding=null,this.shouldUpdateGroupingOnNextResize=!1,e.itemsView.children.bindTo(this.ungroupedItems).using(e=>e),this.ungroupedItems.on("add",this._updateFocusCycleableItems.bind(this)),this.ungroupedItems.on("remove",this._updateFocusCycleableItems.bind(this)),e.children.on("add",this._updateFocusCycleableItems.bind(this)),e.children.on("remove",this._updateFocusCycleableItems.bind(this)),e.items.on("change",(e,t)=>{const i=t.index;for(const e of t.removed)i>=this.ungroupedItems.length?this.groupedItems.remove(e):this.ungroupedItems.remove(e);for(let e=i;ethis.ungroupedItems.length?this.groupedItems.add(o,e-this.ungroupedItems.length):this.ungroupedItems.add(o,e)}this._updateGrouping()}),e.extendTemplate({attributes:{class:["ck-toolbar_grouping"]}})}render(e){this.viewElement=e.element,this._enableGroupingOnResize(),this._enableGroupingOnMaxWidthChange(e)}destroy(){this.groupedItemsDropdown.destroy(),this.resizeObserver.destroy()}_updateGrouping(){if(!this.viewElement.ownerDocument.body.contains(this.viewElement))return;if(!this.viewElement.offsetParent)return void(this.shouldUpdateGroupingOnNextResize=!0);const e=this.groupedItems.length;let t;for(;this._areItemsOverflowing;)this._groupLastItem(),t=!0;if(!t&&this.groupedItems.length){for(;this.groupedItems.length&&!this._areItemsOverflowing;)this._ungroupFirstItem();this._areItemsOverflowing&&this._groupLastItem()}this.groupedItems.length!==e&&this.view.fire("groupedItemsUpdate")}get _areItemsOverflowing(){if(!this.ungroupedItems.length)return!1;const e=this.viewElement,t=this.viewLocale.uiLanguageDirection,i=new Es(e.lastChild),o=new Es(e);if(!this.cachedPadding){const i=vr.window.getComputedStyle(e),o="ltr"===t?"paddingRight":"paddingLeft";this.cachedPadding=Number.parseInt(i[o])}return"ltr"===t?i.right>o.right-this.cachedPadding:i.left{e&&e===t.contentRect.width&&!this.shouldUpdateGroupingOnNextResize||(this.shouldUpdateGroupingOnNextResize=!1,this._updateGrouping(),e=t.contentRect.width)}),this._updateGrouping()}_enableGroupingOnMaxWidthChange(e){e.on("change:maxWidth",()=>{this._updateGrouping()})}_groupLastItem(){this.groupedItems.length||(this.viewChildren.add(new Wd),this.viewChildren.add(this.groupedItemsDropdown),this.viewFocusTracker.add(this.groupedItemsDropdown.element)),this.groupedItems.add(this.ungroupedItems.remove(this.ungroupedItems.last),0)}_ungroupFirstItem(){this.ungroupedItems.add(this.groupedItems.remove(this.groupedItems.first)),this.groupedItems.length||(this.viewChildren.remove(this.groupedItemsDropdown),this.viewChildren.remove(this.viewChildren.last),this.viewFocusTracker.remove(this.groupedItemsDropdown.element))}_createGroupedItemsDropdown(){const e=this.viewLocale,t=e.t,i=Zd(e);return i.class="ck-toolbar__grouped-dropdown",i.panelPosition="ltr"===e.uiLanguageDirection?"sw":"se",eh(i,[]),i.buttonView.set({label:t("Show more items"),tooltip:!0,tooltipPosition:"rtl"===e.uiLanguageDirection?"se":"sw",icon:Qc}),i.toolbarView.items.bindTo(this.groupedItems).using(e=>e),i}_updateFocusCycleableItems(){this.viewFocusables.clear(),this.ungroupedItems.map(e=>{this.viewFocusables.add(e)}),this.groupedItems.length&&this.viewFocusables.add(this.groupedItemsDropdown)}}i(35);class Yd extends id{constructor(){super(),this.items=this.createCollection(),this.focusTracker=new Ms,this.keystrokes=new Ns,this._focusCycler=new Id({focusables:this.items,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"arrowup",focusNext:"arrowdown"}}),this.setTemplate({tag:"ul",attributes:{class:["ck","ck-reset","ck-list"]},children:this.items})}render(){super.render();for(const e of this.items)this.focusTracker.add(e.element);this.items.on("add",(e,t)=>{this.focusTracker.add(t.element)}),this.items.on("remove",(e,t)=>{this.focusTracker.remove(t.element)}),this.keystrokes.listenTo(this.element)}focus(){this._focusCycler.focusFirst()}focusLast(){this._focusCycler.focusLast()}}class Qd extends id{constructor(e){super(e),this.children=this.createCollection(),this.setTemplate({tag:"li",attributes:{class:["ck","ck-list__item"]},children:this.children})}focus(){this.children.first.focus()}}class Xd extends id{constructor(e){super(e),this.setTemplate({tag:"li",attributes:{class:["ck","ck-list__separator"]}})}}i(37),i(39);function Zd(e,t=Md){const i=new t(e),o=new Bd(e),n=new jd(e,i,o);return i.bind("isEnabled").to(n),i instanceof Md?i.bind("isOn").to(n,"isOpen"):i.arrowView.bind("isOn").to(n,"isOpen"),function(e){(function(e){e.on("render",()=>{Xc({emitter:e,activator:()=>e.isOpen,callback:()=>{e.isOpen=!1},contextElements:[e.element]})})})(e),function(e){e.on("execute",t=>{t.source instanceof Td||(e.isOpen=!1)})}(e),function(e){e.keystrokes.set("arrowdown",(t,i)=>{e.isOpen&&(e.panelView.focus(),i())}),e.keystrokes.set("arrowup",(t,i)=>{e.isOpen&&(e.panelView.focusLast(),i())})}(e)}(n),n}function eh(e,t){const i=e.locale,o=i.t,n=e.toolbarView=new Ud(i);n.set("ariaLabel",o("Dropdown toolbar")),e.extendTemplate({attributes:{class:["ck-toolbar-dropdown"]}}),t.map(e=>n.items.add(e)),e.panelView.children.add(n),n.items.delegate("execute").to(e)}function th(e,t){const i=e.locale,o=e.listView=new Yd(i);o.items.bindTo(t).using(({type:e,model:t})=>{if("separator"===e)return new Xd(i);if("button"===e||"switchbutton"===e){const o=new Qd(i);let n;return n="button"===e?new Ad(i):new Td(i),n.bind(...Object.keys(t)).to(t),n.delegate("execute").to(o),o.children.add(n),o}}),e.panelView.children.add(o),o.items.delegate("execute").to(e)}i(41);class ih extends id{constructor(e){super(e),this.body=new yd(e)}render(){super.render(),this.body.attachToDom()}destroy(){return this.body.detachFromDom(),super.destroy()}}i(43);class oh extends id{constructor(e){super(e),this.set("text"),this.set("for"),this.id="ck-editor__label_"+s();const t=this.bindTemplate;this.setTemplate({tag:"label",attributes:{class:["ck","ck-label"],id:this.id,for:t.to("for")},children:[{text:t.to("text")}]})}}class nh extends id{constructor(e,t,i){super(e),this.setTemplate({tag:"div",attributes:{class:["ck","ck-content","ck-editor__editable","ck-rounded-corners"],lang:e.contentLanguage,dir:e.contentLanguageDirection}}),this.name=null,this.set("isFocused",!1),this._editableElement=i,this._hasExternalElement=!!this._editableElement,this._editingView=t}render(){super.render(),this._hasExternalElement?this.template.apply(this.element=this._editableElement):this._editableElement=this.element,this.on("change:isFocused",()=>this._updateIsFocusedClasses()),this._updateIsFocusedClasses()}destroy(){this._hasExternalElement&&this.template.revert(this._editableElement),super.destroy()}_updateIsFocusedClasses(){const e=this._editingView;function t(t){e.change(i=>{const o=e.document.getRoot(t.name);i.addClass(t.isFocused?"ck-focused":"ck-blurred",o),i.removeClass(t.isFocused?"ck-blurred":"ck-focused",o)})}e.isRenderingInProgress?function i(o){e.once("change:isRenderingInProgress",(e,n,r)=>{r?i(o):t(o)})}(this):t(this)}}class rh extends nh{constructor(e,t,i){super(e,t,i),this.extendTemplate({attributes:{role:"textbox",class:"ck-editor__editable_inline"}})}render(){super.render();const e=this._editingView,t=this.t;e.change(i=>{const o=e.document.getRoot(this.name);i.setAttribute("aria-label",t("Rich Text Editor, %0",this.name),o)})}}i(45);class sh extends id{constructor(e,t={}){super(e);const i=this.bindTemplate;this.set("label",t.label||""),this.set("class",t.class||null),this.children=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-form__header",i.to("class")]},children:this.children});const o=new id(e);o.setTemplate({tag:"span",attributes:{class:["ck","ck-form__header__label"]},children:[{text:i.to("label")}]}),this.children.add(o)}}i(47);class ah extends id{constructor(e){super(e),this.set("value"),this.set("id"),this.set("placeholder"),this.set("isReadOnly",!1),this.set("hasError",!1),this.set("ariaDescribedById"),this.focusTracker=new Ms,this.bind("isFocused").to(this.focusTracker),this.set("isEmpty",!0);const t=this.bindTemplate;this.setTemplate({tag:"input",attributes:{type:"text",class:["ck","ck-input","ck-input-text",t.if("isFocused","ck-input_focused"),t.if("isEmpty","ck-input-text_empty"),t.if("hasError","ck-error")],id:t.to("id"),placeholder:t.to("placeholder"),readonly:t.to("isReadOnly"),"aria-invalid":t.if("hasError",!0),"aria-describedby":t.to("ariaDescribedById")},on:{input:t.to("input"),change:t.to(this._updateIsEmpty.bind(this))}})}render(){super.render(),this.focusTracker.add(this.element),this._setDomElementValue(this.value),this._updateIsEmpty(),this.on("change:value",(e,t,i)=>{this._setDomElementValue(i),this._updateIsEmpty()})}select(){this.element.select()}focus(){this.element.focus()}_updateIsEmpty(){this.isEmpty=!this.element.value}_setDomElementValue(e){this.element.value=e||0===e?e:""}}i(49);class lh extends id{constructor(e,t){super(e);const i="ck-labeled-field-view-"+s(),o="ck-labeled-field-view-status-"+s();this.fieldView=t(this,i,o),this.set("label"),this.set("isEnabled",!0),this.set("isEmpty",!0),this.set("isFocused",!1),this.set("errorText",null),this.set("infoText",null),this.set("class"),this.set("placeholder"),this.labelView=this._createLabelView(i),this.statusView=this._createStatusView(o),this.bind("_statusText").to(this,"errorText",this,"infoText",(e,t)=>e||t);const n=this.bindTemplate;this.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-field-view",n.to("class"),n.if("isEnabled","ck-disabled",e=>!e),n.if("isEmpty","ck-labeled-field-view_empty"),n.if("isFocused","ck-labeled-field-view_focused"),n.if("placeholder","ck-labeled-field-view_placeholder"),n.if("errorText","ck-error")]},children:[{tag:"div",attributes:{class:["ck","ck-labeled-field-view__input-wrapper"]},children:[this.fieldView,this.labelView]},this.statusView]})}_createLabelView(e){const t=new oh(this.locale);return t.for=e,t.bind("text").to(this,"label"),t}_createStatusView(e){const t=new id(this.locale),i=this.bindTemplate;return t.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-field-view__status",i.if("errorText","ck-labeled-field-view__status_error"),i.if("_statusText","ck-hidden",e=>!e)],id:e,role:i.if("errorText","alert")},children:[{text:i.to("_statusText")}]}),t}focus(){this.fieldView.focus()}}function ch(e,t,i){const o=new ah(e.locale);return o.set({id:t,ariaDescribedById:i}),o.bind("isReadOnly").to(e,"isEnabled",e=>!e),o.bind("hasError").to(e,"errorText",e=>!!e),o.on("input",()=>{e.errorText=null}),e.bind("isEmpty","isFocused","placeholder").to(o),o}function dh(e,t,i){const o=Zd(e.locale);return o.set({id:t,ariaDescribedById:i}),o.bind("isEnabled").to(e),o}class hh extends ao{static get pluginName(){return"Notification"}init(){this.on("show:warning",(e,t)=>{window.alert(t.message)},{priority:"lowest"})}showSuccess(e,t={}){this._showNotification({message:e,type:"success",namespace:t.namespace,title:t.title})}showInfo(e,t={}){this._showNotification({message:e,type:"info",namespace:t.namespace,title:t.title})}showWarning(e,t={}){this._showNotification({message:e,type:"warning",namespace:t.namespace,title:t.title})}_showNotification(e){const t="show:"+e.type+(e.namespace?":"+e.namespace:"");this.fire(t,{message:e.message,type:e.type,title:e.title||""})}}class uh{constructor(e,t){t&&Be(this,t),e&&this.set(e)}}Ye(uh,qe);i(51);const mh=zs("px"),gh=vr.document.body;class fh extends id{constructor(e){super(e);const t=this.bindTemplate;this.set("top",0),this.set("left",0),this.set("position","arrow_nw"),this.set("isVisible",!1),this.set("withArrow",!0),this.set("class"),this.content=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-panel",t.to("position",e=>"ck-balloon-panel_"+e),t.if("isVisible","ck-balloon-panel_visible"),t.if("withArrow","ck-balloon-panel_with-arrow"),t.to("class")],style:{top:t.to("top",mh),left:t.to("left",mh)}},children:this.content})}show(){this.isVisible=!0}hide(){this.isVisible=!1}attachTo(e){this.show();const t=fh.defaultPositions,i=Object.assign({},{element:this.element,positions:[t.southArrowNorth,t.southArrowNorthMiddleWest,t.southArrowNorthMiddleEast,t.southArrowNorthWest,t.southArrowNorthEast,t.northArrowSouth,t.northArrowSouthMiddleWest,t.northArrowSouthMiddleEast,t.northArrowSouthWest,t.northArrowSouthEast],limiter:gh,fitInViewport:!0},e),o=fh._getOptimalPosition(i),n=parseInt(o.left),r=parseInt(o.top),s=o.name;Object.assign(this,{top:r,left:n,position:s})}pin(e){this.unpin(),this._pinWhenIsVisibleCallback=()=>{this.isVisible?this._startPinning(e):this._stopPinning()},this._startPinning(e),this.listenTo(this,"change:isVisible",this._pinWhenIsVisibleCallback)}unpin(){this._pinWhenIsVisibleCallback&&(this._stopPinning(),this.stopListening(this,"change:isVisible",this._pinWhenIsVisibleCallback),this._pinWhenIsVisibleCallback=null,this.hide())}_startPinning(e){this.attachTo(e);const t=ph(e.target),i=e.limiter?ph(e.limiter):gh;this.listenTo(vr.document,"scroll",(o,n)=>{const r=n.target,s=t&&r.contains(t),a=i&&r.contains(i);!s&&!a&&t&&i||this.attachTo(e)},{useCapture:!0}),this.listenTo(vr.window,"resize",()=>{this.attachTo(e)})}_stopPinning(){this.stopListening(vr.document,"scroll"),this.stopListening(vr.window,"resize")}}function ph(e){return Gi(e)?e:Cs(e)?e.commonAncestorContainer:"function"==typeof e?ph(e()):null}function bh(e,t){return e.top-t.height-fh.arrowVerticalOffset}function wh(e){return e.bottom+fh.arrowVerticalOffset}fh.arrowHorizontalOffset=25,fh.arrowVerticalOffset=10,fh._getOptimalPosition=Fd,fh.defaultPositions={northWestArrowSouthWest:(e,t)=>({top:bh(e,t),left:e.left-fh.arrowHorizontalOffset,name:"arrow_sw"}),northWestArrowSouthMiddleWest:(e,t)=>({top:bh(e,t),left:e.left-.25*t.width-fh.arrowHorizontalOffset,name:"arrow_smw"}),northWestArrowSouth:(e,t)=>({top:bh(e,t),left:e.left-t.width/2,name:"arrow_s"}),northWestArrowSouthMiddleEast:(e,t)=>({top:bh(e,t),left:e.left-.75*t.width+fh.arrowHorizontalOffset,name:"arrow_sme"}),northWestArrowSouthEast:(e,t)=>({top:bh(e,t),left:e.left-t.width+fh.arrowHorizontalOffset,name:"arrow_se"}),northArrowSouthWest:(e,t)=>({top:bh(e,t),left:e.left+e.width/2-fh.arrowHorizontalOffset,name:"arrow_sw"}),northArrowSouthMiddleWest:(e,t)=>({top:bh(e,t),left:e.left+e.width/2-.25*t.width-fh.arrowHorizontalOffset,name:"arrow_smw"}),northArrowSouth:(e,t)=>({top:bh(e,t),left:e.left+e.width/2-t.width/2,name:"arrow_s"}),northArrowSouthMiddleEast:(e,t)=>({top:bh(e,t),left:e.left+e.width/2-.75*t.width+fh.arrowHorizontalOffset,name:"arrow_sme"}),northArrowSouthEast:(e,t)=>({top:bh(e,t),left:e.left+e.width/2-t.width+fh.arrowHorizontalOffset,name:"arrow_se"}),northEastArrowSouthWest:(e,t)=>({top:bh(e,t),left:e.right-fh.arrowHorizontalOffset,name:"arrow_sw"}),northEastArrowSouthMiddleWest:(e,t)=>({top:bh(e,t),left:e.right-.25*t.width-fh.arrowHorizontalOffset,name:"arrow_smw"}),northEastArrowSouth:(e,t)=>({top:bh(e,t),left:e.right-t.width/2,name:"arrow_s"}),northEastArrowSouthMiddleEast:(e,t)=>({top:bh(e,t),left:e.right-.75*t.width+fh.arrowHorizontalOffset,name:"arrow_sme"}),northEastArrowSouthEast:(e,t)=>({top:bh(e,t),left:e.right-t.width+fh.arrowHorizontalOffset,name:"arrow_se"}),southWestArrowNorthWest:(e,t)=>({top:wh(e),left:e.left-fh.arrowHorizontalOffset,name:"arrow_nw"}),southWestArrowNorthMiddleWest:(e,t)=>({top:wh(e),left:e.left-.25*t.width-fh.arrowHorizontalOffset,name:"arrow_nmw"}),southWestArrowNorth:(e,t)=>({top:wh(e),left:e.left-t.width/2,name:"arrow_n"}),southWestArrowNorthMiddleEast:(e,t)=>({top:wh(e),left:e.left-.75*t.width+fh.arrowHorizontalOffset,name:"arrow_nme"}),southWestArrowNorthEast:(e,t)=>({top:wh(e),left:e.left-t.width+fh.arrowHorizontalOffset,name:"arrow_ne"}),southArrowNorthWest:(e,t)=>({top:wh(e),left:e.left+e.width/2-fh.arrowHorizontalOffset,name:"arrow_nw"}),southArrowNorthMiddleWest:(e,t)=>({top:wh(e),left:e.left+e.width/2-.25*t.width-fh.arrowHorizontalOffset,name:"arrow_nmw"}),southArrowNorth:(e,t)=>({top:wh(e),left:e.left+e.width/2-t.width/2,name:"arrow_n"}),southArrowNorthMiddleEast:(e,t)=>({top:wh(e),left:e.left+e.width/2-.75*t.width+fh.arrowHorizontalOffset,name:"arrow_nme"}),southArrowNorthEast:(e,t)=>({top:wh(e),left:e.left+e.width/2-t.width+fh.arrowHorizontalOffset,name:"arrow_ne"}),southEastArrowNorthWest:(e,t)=>({top:wh(e),left:e.right-fh.arrowHorizontalOffset,name:"arrow_nw"}),southEastArrowNorthMiddleWest:(e,t)=>({top:wh(e),left:e.right-.25*t.width-fh.arrowHorizontalOffset,name:"arrow_nmw"}),southEastArrowNorth:(e,t)=>({top:wh(e),left:e.right-t.width/2,name:"arrow_n"}),southEastArrowNorthMiddleEast:(e,t)=>({top:wh(e),left:e.right-.75*t.width+fh.arrowHorizontalOffset,name:"arrow_nme"}),southEastArrowNorthEast:(e,t)=>({top:wh(e),left:e.right-t.width+fh.arrowHorizontalOffset,name:"arrow_ne"})};i(53),i(55);const kh=zs("px");class _h extends Qe{static get pluginName(){return"ContextualBalloon"}constructor(e){super(e),this.positionLimiter=()=>{const e=this.editor.editing.view,t=e.document.selection.editableElement;return t?e.domConverter.mapViewToDom(t.root):null},this.set("visibleView",null),this.view=new fh(e.locale),e.ui.view.body.add(this.view),e.ui.focusTracker.add(this.view.element),this._viewToStack=new Map,this._idToStack=new Map,this.set("_numberOfStacks",0),this.set("_singleViewMode",!1),this._rotatorView=this._createRotatorView(),this._fakePanelsView=this._createFakePanelsView()}hasView(e){return Array.from(this._viewToStack.keys()).includes(e)}add(e){if(this.hasView(e.view))throw new l.a("contextualballoon-add-view-exist",[this,e]);const t=e.stackId||"main";if(!this._idToStack.has(t))return this._idToStack.set(t,new Map([[e.view,e]])),this._viewToStack.set(e.view,this._idToStack.get(t)),this._numberOfStacks=this._idToStack.size,void(this._visibleStack&&!e.singleViewMode||this.showStack(t));const i=this._idToStack.get(t);e.singleViewMode&&this.showStack(t),i.set(e.view,e),this._viewToStack.set(e.view,i),i===this._visibleStack&&this._showView(e)}remove(e){if(!this.hasView(e))throw new l.a("contextualballoon-remove-view-not-exist",[this,e]);const t=this._viewToStack.get(e);this._singleViewMode&&this.visibleView===e&&(this._singleViewMode=!1),this.visibleView===e&&(1===t.size?this._idToStack.size>1?this._showNextStack():(this.view.hide(),this.visibleView=null,this._rotatorView.hideView()):this._showView(Array.from(t.values())[t.size-2])),1===t.size?(this._idToStack.delete(this._getStackId(t)),this._numberOfStacks=this._idToStack.size):t.delete(e),this._viewToStack.delete(e)}updatePosition(e){e&&(this._visibleStack.get(this.visibleView).position=e),this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition()}showStack(e){this.visibleStack=e;const t=this._idToStack.get(e);if(!t)throw new l.a("contextualballoon-showstack-stack-not-exist",this);this._visibleStack!==t&&this._showView(Array.from(t.values()).pop())}get _visibleStack(){return this._viewToStack.get(this.visibleView)}_getStackId(e){return Array.from(this._idToStack.entries()).find(t=>t[1]===e)[0]}_showNextStack(){const e=Array.from(this._idToStack.values());let t=e.indexOf(this._visibleStack)+1;e[t]||(t=0),this.showStack(this._getStackId(e[t]))}_showPrevStack(){const e=Array.from(this._idToStack.values());let t=e.indexOf(this._visibleStack)-1;e[t]||(t=e.length-1),this.showStack(this._getStackId(e[t]))}_createRotatorView(){const e=new vh(this.editor.locale),t=this.editor.locale.t;return this.view.content.add(e),e.bind("isNavigationVisible").to(this,"_numberOfStacks",this,"_singleViewMode",(e,t)=>!t&&e>1),e.on("change:isNavigationVisible",()=>this.updatePosition(),{priority:"low"}),e.bind("counter").to(this,"visibleView",this,"_numberOfStacks",(e,i)=>{if(i<2)return"";const o=Array.from(this._idToStack.values()).indexOf(this._visibleStack)+1;return t("%0 of %1",[o,i])}),e.buttonNextView.on("execute",()=>{e.focusTracker.isFocused&&this.editor.editing.view.focus(),this._showNextStack()}),e.buttonPrevView.on("execute",()=>{e.focusTracker.isFocused&&this.editor.editing.view.focus(),this._showPrevStack()}),e}_createFakePanelsView(){const e=new yh(this.editor.locale,this.view);return e.bind("numberOfPanels").to(this,"_numberOfStacks",this,"_singleViewMode",(e,t)=>!t&&e>=2?Math.min(e-1,2):0),e.listenTo(this.view,"change:top",()=>e.updatePosition()),e.listenTo(this.view,"change:left",()=>e.updatePosition()),this.editor.ui.view.body.add(e),e}_showView({view:e,balloonClassName:t="",withArrow:i=!0,singleViewMode:o=!1}){this.view.class=t,this.view.withArrow=i,this._rotatorView.showView(e),this.visibleView=e,this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition(),o&&(this._singleViewMode=!0)}_getBalloonPosition(){let e=Array.from(this._visibleStack.values()).pop().position;return e&&!e.limiter&&(e=Object.assign({},e,{limiter:this.positionLimiter})),e}}class vh extends id{constructor(e){super(e);const t=e.t,i=this.bindTemplate;this.set("isNavigationVisible",!0),this.focusTracker=new Ms,this.buttonPrevView=this._createButtonView(t("Previous"),''),this.buttonNextView=this._createButtonView(t("Next"),''),this.content=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-rotator"],"z-index":"-1"},children:[{tag:"div",attributes:{class:["ck-balloon-rotator__navigation",i.to("isNavigationVisible",e=>e?"":"ck-hidden")]},children:[this.buttonPrevView,{tag:"span",attributes:{class:["ck-balloon-rotator__counter"]},children:[{text:i.to("counter")}]},this.buttonNextView]},{tag:"div",attributes:{class:"ck-balloon-rotator__content"},children:this.content}]})}render(){super.render(),this.focusTracker.add(this.element)}showView(e){this.hideView(),this.content.add(e)}hideView(){this.content.clear()}_createButtonView(e,t){const i=new Ad(this.locale);return i.set({label:e,icon:t,tooltip:!0}),i}}class yh extends id{constructor(e,t){super(e);const i=this.bindTemplate;this.set("top",0),this.set("left",0),this.set("height",0),this.set("width",0),this.set("numberOfPanels",0),this.content=this.createCollection(),this._balloonPanelView=t,this.setTemplate({tag:"div",attributes:{class:["ck-fake-panel",i.to("numberOfPanels",e=>e?"":"ck-hidden")],style:{top:i.to("top",kh),left:i.to("left",kh),width:i.to("width",kh),height:i.to("height",kh)}},children:this.content}),this.on("change:numberOfPanels",(e,t,i,o)=>{i>o?this._addPanels(i-o):this._removePanels(o-i),this.updatePosition()})}_addPanels(e){for(;e--;){const e=new id;e.setTemplate({tag:"div"}),this.content.add(e),this.registerChild(e)}}_removePanels(e){for(;e--;){const e=this.content.last;this.content.remove(e),this.deregisterChild(e),e.destroy()}}updatePosition(){if(this.numberOfPanels){const{top:e,left:t}=this._balloonPanelView,{width:i,height:o}=new Es(this._balloonPanelView.element);Object.assign(this,{top:e,left:t,width:i,height:o})}}}i(57);zs("px");const xh=zs("px");class Ch extends Qe{static get pluginName(){return"BalloonToolbar"}static get requires(){return[_h]}constructor(e){super(e),this._balloonConfig=$d(e.config.get("balloonToolbar")),this.toolbarView=this._createToolbarView(),this.focusTracker=new Ms,e.ui.once("ready",()=>{this.focusTracker.add(e.ui.getEditableElement()),this.focusTracker.add(this.toolbarView.element)}),this._resizeObserver=null,this._balloon=e.plugins.get(_h),this._fireSelectionChangeDebounced=ps(()=>this.fire("_selectionChangeDebounced"),200),this.decorate("show")}init(){const e=this.editor,t=e.model.document.selection;this.listenTo(this.focusTracker,"change:isFocused",(e,t,i)=>{const o=this._balloon.visibleView===this.toolbarView;!i&&o?this.hide():i&&this.show()}),this.listenTo(t,"change:range",(e,i)=>{(i.directChange||t.isCollapsed)&&this.hide(),this._fireSelectionChangeDebounced()}),this.listenTo(this,"_selectionChangeDebounced",()=>{this.editor.editing.view.document.isFocused&&this.show()}),this._balloonConfig.shouldNotGroupWhenFull||this.listenTo(e,"ready",()=>{const t=e.ui.view.editable.element;this._resizeObserver=new Rs(t,()=>{this.toolbarView.maxWidth=xh(.9*new Es(t).width)})}),this.listenTo(this.toolbarView,"groupedItemsUpdate",()=>{this._updatePosition()})}afterInit(){const e=this.editor.ui.componentFactory;this.toolbarView.fillFromConfig(this._balloonConfig,e)}_createToolbarView(){const e=!this._balloonConfig.shouldNotGroupWhenFull,t=new Ud(this.editor.locale,{shouldGroupWhenFull:e,isFloating:!0});return t.render(),t}show(){const e=this.editor,t=e.model.document.selection,i=e.model.schema;this._balloon.hasView(this.toolbarView)||t.isCollapsed||function(e,t){if(1===e.rangeCount)return!1;return[...e.getRanges()].every(e=>{const i=e.getContainedElement();return i&&t.isSelectable(i)})}(t,i)||Array.from(this.toolbarView.items).every(e=>void 0!==e.isEnabled&&!e.isEnabled)||(this.listenTo(this.editor.ui,"update",()=>{this._updatePosition()}),this._balloon.add({view:this.toolbarView,position:this._getBalloonPositionData(),balloonClassName:"ck-toolbar-container"}))}hide(){this._balloon.hasView(this.toolbarView)&&(this.stopListening(this.editor.ui,"update"),this._balloon.remove(this.toolbarView))}_getBalloonPositionData(){const e=this.editor.editing.view,t=e.document,i=t.selection,o=t.selection.isBackward;return{target:()=>{const t=o?i.getFirstRange():i.getLastRange(),n=Es.getDomRangeRects(e.domConverter.viewRangeToDom(t));return o?n[0]:(n.length>1&&0===n[n.length-1].width&&n.pop(),n[n.length-1])},positions:Ah(o)}}_updatePosition(){this._balloon.updatePosition(this._getBalloonPositionData())}destroy(){super.destroy(),this.stopListening(),this._fireSelectionChangeDebounced.cancel(),this.toolbarView.destroy(),this.focusTracker.destroy(),this._resizeObserver&&this._resizeObserver.destroy()}}function Ah(e){const t=fh.defaultPositions;return e?[t.northWestArrowSouth,t.northWestArrowSouthWest,t.northWestArrowSouthEast,t.northWestArrowSouthMiddleEast,t.northWestArrowSouthMiddleWest,t.southWestArrowNorth,t.southWestArrowNorthWest,t.southWestArrowNorthEast,t.southWestArrowNorthMiddleWest,t.southWestArrowNorthMiddleEast]:[t.southEastArrowNorth,t.southEastArrowNorthEast,t.southEastArrowNorthWest,t.southEastArrowNorthMiddleEast,t.southEastArrowNorthMiddleWest,t.northEastArrowSouth,t.northEastArrowSouthEast,t.northEastArrowSouthWest,t.northEastArrowSouthMiddleEast,t.northEastArrowSouthMiddleWest]}i(59);const Th=zs("px");class Eh extends Ad{constructor(e){super(e);const t=this.bindTemplate;this.isVisible=!1,this.isToggleable=!0,this.set("top",0),this.set("left",0),this.extendTemplate({attributes:{class:"ck-block-toolbar-button",style:{top:t.to("top",e=>Th(e)),left:t.to("left",e=>Th(e))}}})}}const Ph=zs("px");i(61);const Sh=new WeakMap;function Rh(e){const{view:t,element:i,text:o,isDirectHost:n=!0,keepOnFocus:r=!1}=e,s=t.document;Sh.has(s)||(Sh.set(s,new Map),s.registerPostFixer(e=>Vh(s,e))),Sh.get(s).set(i,{text:o,isDirectHost:n,keepOnFocus:r,hostElement:n?i:null}),t.change(e=>Vh(s,e))}function Ih(e,t){return!!t.hasClass("ck-placeholder")&&(e.removeClass("ck-placeholder",t),!0)}function Vh(e,t){const i=Sh.get(e),o=[];let n=!1;for(const[e,r]of i)r.isDirectHost&&(o.push(e),zh(t,e,r)&&(n=!0));for(const[e,r]of i){if(r.isDirectHost)continue;const i=Oh(e);i&&(o.includes(i)||(r.hostElement=i,zh(t,e,r)&&(n=!0)))}return n}function zh(e,t,i){const{text:o,isDirectHost:n,hostElement:r}=i;let s=!1;r.getAttribute("data-placeholder")!==o&&(e.setAttribute("data-placeholder",o,r),s=!0);return(n||1==t.childCount)&&function(e,t){if(!e.isAttached())return!1;if(Array.from(e.getChildren()).some(e=>!e.is("uiElement")))return!1;if(t)return!0;const i=e.document;if(!i.isFocused)return!0;const o=i.selection.anchor;return o&&o.parent!==e}(r,i.keepOnFocus)?function(e,t){return!t.hasClass("ck-placeholder")&&(e.addClass("ck-placeholder",t),!0)}(e,r)&&(s=!0):Ih(e,r)&&(s=!0),s}function Oh(e){if(e.childCount){const t=e.getChild(0);if(t.is("element")&&!t.is("uiElement"))return t}return null}const Mh=new Map;function Nh(e,t,i){let o=Mh.get(e);o||(o=new Map,Mh.set(e,o)),o.set(t,i)}function Bh(e){return[e]}function Fh(e,t,i={}){const o=function(e,t){const i=Mh.get(e);return i&&i.has(t)?i.get(t):Bh}(e.constructor,t.constructor);try{return o(e=e.clone(),t,i)}catch(e){throw e}}function Dh(e,t,i){e=e.slice(),t=t.slice();const o=new 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i=t.getMovedRangeStart(),o=e.start.hasSameParentAs(i);e=e._getTransformedByInsertion(i,t.howMany,o),r.push(...e)}o&&r.push(o._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany,!1)[0]);return r}(e.range,t).map(t=>new Al(t,e.key,e.oldValue,e.newValue,e.baseVersion))),Nh(Al,zl,(e,t)=>{if(e.range.end.isEqual(t.insertionPosition))return t.graveyardPosition||e.range.end.offset++,[e];if(e.range.start.hasSameParentAs(t.splitPosition)&&e.range.containsPosition(t.splitPosition)){const i=e.clone();return i.range=new sa(t.moveTargetPosition.clone(),e.range.end._getCombined(t.splitPosition,t.moveTargetPosition)),e.range.end=t.splitPosition.clone(),e.range.end.stickiness="toPrevious",[e,i]}return e.range=e.range._getTransformedBySplitOperation(t),[e]}),Nh(Pl,Al,(e,t)=>{const i=[e];if(e.shouldReceiveAttributes&&e.position.hasSameParentAs(t.range.start)&&t.range.containsPosition(e.position)){const o=Wh(e,t.key,t.newValue);o&&i.push(o)}return i}),Nh(Pl,Pl,(e,t,i)=>(e.position.isEqual(t.position)&&i.aIsStrong||(e.position=e.position._getTransformedByInsertOperation(t)),[e])),Nh(Pl,El,(e,t)=>(e.position=e.position._getTransformedByMoveOperation(t),[e])),Nh(Pl,zl,(e,t)=>(e.position=e.position._getTransformedBySplitOperation(t),[e])),Nh(Pl,Vl,(e,t)=>(e.position=e.position._getTransformedByMergeOperation(t),[e])),Nh(Sl,Pl,(e,t)=>(e.oldRange&&(e.oldRange=e.oldRange._getTransformedByInsertOperation(t)[0]),e.newRange&&(e.newRange=e.newRange._getTransformedByInsertOperation(t)[0]),[e])),Nh(Sl,Sl,(e,t,i)=>{if(e.name==t.name){if(!i.aIsStrong)return[new Xl(0)];e.oldRange=t.newRange?t.newRange.clone():null}return[e]}),Nh(Sl,Vl,(e,t)=>(e.oldRange&&(e.oldRange=e.oldRange._getTransformedByMergeOperation(t)),e.newRange&&(e.newRange=e.newRange._getTransformedByMergeOperation(t)),[e])),Nh(Sl,El,(e,t,i)=>{if(e.oldRange&&(e.oldRange=sa._createFromRanges(e.oldRange._getTransformedByMoveOperation(t))),e.newRange){if(i.abRelation){const o=sa._createFromRanges(e.newRange._getTransformedByMoveOperation(t));if("left"==i.abRelation.side&&t.targetPosition.isEqual(e.newRange.start))return e.newRange.start.path=i.abRelation.path,e.newRange.end=o.end,[e];if("right"==i.abRelation.side&&t.targetPosition.isEqual(e.newRange.end))return e.newRange.start=o.start,e.newRange.end.path=i.abRelation.path,[e]}e.newRange=sa._createFromRanges(e.newRange._getTransformedByMoveOperation(t))}return[e]}),Nh(Sl,zl,(e,t,i)=>{if(e.oldRange&&(e.oldRange=e.oldRange._getTransformedBySplitOperation(t)),e.newRange){if(i.abRelation){const o=e.newRange._getTransformedBySplitOperation(t);return e.newRange.start.isEqual(t.splitPosition)&&i.abRelation.wasStartBeforeMergedElement?e.newRange.start=ia._createAt(t.insertionPosition):e.newRange.start.isEqual(t.splitPosition)&&!i.abRelation.wasInLeftElement&&(e.newRange.start=ia._createAt(t.moveTargetPosition)),e.newRange.end.isEqual(t.splitPosition)&&i.abRelation.wasInRightElement?e.newRange.end=ia._createAt(t.moveTargetPosition):e.newRange.end.isEqual(t.splitPosition)&&i.abRelation.wasEndBeforeMergedElement?e.newRange.end=ia._createAt(t.insertionPosition):e.newRange.end=o.end,[e]}e.newRange=e.newRange._getTransformedBySplitOperation(t)}return[e]}),Nh(Vl,Pl,(e,t)=>(e.sourcePosition.hasSameParentAs(t.position)&&(e.howMany+=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByInsertOperation(t),e.targetPosition=e.targetPosition._getTransformedByInsertOperation(t),[e])),Nh(Vl,Vl,(e,t,i)=>{if(e.sourcePosition.isEqual(t.sourcePosition)&&e.targetPosition.isEqual(t.targetPosition)){if(i.bWasUndone){const i=t.graveyardPosition.path.slice();return i.push(0),e.sourcePosition=new ia(t.graveyardPosition.root,i),e.howMany=0,[e]}return[new Xl(0)]}if(e.sourcePosition.isEqual(t.sourcePosition)&&!e.targetPosition.isEqual(t.targetPosition)&&!i.bWasUndone&&"splitAtSource"!=i.abRelation){const o="$graveyard"==e.targetPosition.root.rootName,n="$graveyard"==t.targetPosition.root.rootName,r=o&&!n;if(n&&!o||!r&&i.aIsStrong){const i=t.targetPosition._getTransformedByMergeOperation(t),o=e.targetPosition._getTransformedByMergeOperation(t);return[new El(i,e.howMany,o,0)]}return[new Xl(0)]}return e.sourcePosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByMergeOperation(t),e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),e.graveyardPosition.isEqual(t.graveyardPosition)&&i.aIsStrong||(e.graveyardPosition=e.graveyardPosition._getTransformedByMergeOperation(t)),[e]}),Nh(Vl,El,(e,t,i)=>{const o=sa._createFromPositionAndShift(t.sourcePosition,t.howMany);return"remove"==t.type&&!i.bWasUndone&&!i.forceWeakRemove&&e.deletionPosition.hasSameParentAs(t.sourcePosition)&&o.containsPosition(e.sourcePosition)?[new Xl(0)]:(e.sourcePosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.sourcePosition.hasSameParentAs(t.sourcePosition)&&(e.howMany-=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByMoveOperation(t),e.targetPosition=e.targetPosition._getTransformedByMoveOperation(t),e.graveyardPosition.isEqual(t.targetPosition)||(e.graveyardPosition=e.graveyardPosition._getTransformedByMoveOperation(t)),[e])}),Nh(Vl,zl,(e,t,i)=>{if(t.graveyardPosition&&(e.graveyardPosition=e.graveyardPosition._getTransformedByDeletion(t.graveyardPosition,1),e.deletionPosition.isEqual(t.graveyardPosition)&&(e.howMany=t.howMany)),e.targetPosition.isEqual(t.splitPosition)){const o=0!=t.howMany,n=t.graveyardPosition&&e.deletionPosition.isEqual(t.graveyardPosition);if(o||n||"mergeTargetNotMoved"==i.abRelation)return e.sourcePosition=e.sourcePosition._getTransformedBySplitOperation(t),[e]}if(e.sourcePosition.isEqual(t.splitPosition)){if("mergeSourceNotMoved"==i.abRelation)return e.howMany=0,e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e];if("mergeSameElement"==i.abRelation||e.sourcePosition.offset>0)return e.sourcePosition=t.moveTargetPosition.clone(),e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e]}return e.sourcePosition.hasSameParentAs(t.splitPosition)&&(e.howMany=t.splitPosition.offset),e.sourcePosition=e.sourcePosition._getTransformedBySplitOperation(t),e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e]}),Nh(El,Pl,(e,t)=>{const i=sa._createFromPositionAndShift(e.sourcePosition,e.howMany)._getTransformedByInsertOperation(t,!1)[0];return e.sourcePosition=i.start,e.howMany=i.end.offset-i.start.offset,e.targetPosition.isEqual(t.position)||(e.targetPosition=e.targetPosition._getTransformedByInsertOperation(t)),[e]}),Nh(El,El,(e,t,i)=>{const o=sa._createFromPositionAndShift(e.sourcePosition,e.howMany),n=sa._createFromPositionAndShift(t.sourcePosition,t.howMany);let r,s=i.aIsStrong,a=!i.aIsStrong;if("insertBefore"==i.abRelation||"insertAfter"==i.baRelation?a=!0:"insertAfter"!=i.abRelation&&"insertBefore"!=i.baRelation||(a=!1),r=e.targetPosition.isEqual(t.targetPosition)&&a?e.targetPosition._getTransformedByDeletion(t.sourcePosition,t.howMany):e.targetPosition._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),qh(e,t)&&qh(t,e))return[t.getReversed()];if(o.containsPosition(t.targetPosition)&&o.containsRange(n,!0))return o.start=o.start._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),o.end=o.end._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),$h([o],r);if(n.containsPosition(e.targetPosition)&&n.containsRange(o,!0))return o.start=o.start._getCombined(t.sourcePosition,t.getMovedRangeStart()),o.end=o.end._getCombined(t.sourcePosition,t.getMovedRangeStart()),$h([o],r);const l=lo(e.sourcePosition.getParentPath(),t.sourcePosition.getParentPath());if("prefix"==l||"extension"==l)return o.start=o.start._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),o.end=o.end._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),$h([o],r);"remove"!=e.type||"remove"==t.type||i.aWasUndone||i.forceWeakRemove?"remove"==e.type||"remove"!=t.type||i.bWasUndone||i.forceWeakRemove||(s=!1):s=!0;const c=[],d=o.getDifference(n);for(const e of d){e.start=e.start._getTransformedByDeletion(t.sourcePosition,t.howMany),e.end=e.end._getTransformedByDeletion(t.sourcePosition,t.howMany);const i="same"==lo(e.start.getParentPath(),t.getMovedRangeStart().getParentPath()),o=e._getTransformedByInsertion(t.getMovedRangeStart(),t.howMany,i);c.push(...o)}const h=o.getIntersection(n);return null!==h&&s&&(h.start=h.start._getCombined(t.sourcePosition,t.getMovedRangeStart()),h.end=h.end._getCombined(t.sourcePosition,t.getMovedRangeStart()),0===c.length?c.push(h):1==c.length?n.start.isBefore(o.start)||n.start.isEqual(o.start)?c.unshift(h):c.push(h):c.splice(1,0,h)),0===c.length?[new Xl(e.baseVersion)]:$h(c,r)}),Nh(El,zl,(e,t,i)=>{let o=e.targetPosition.clone();e.targetPosition.isEqual(t.insertionPosition)&&t.graveyardPosition&&"moveTargetAfter"!=i.abRelation||(o=e.targetPosition._getTransformedBySplitOperation(t));const n=sa._createFromPositionAndShift(e.sourcePosition,e.howMany);if(n.end.isEqual(t.insertionPosition))return t.graveyardPosition||e.howMany++,e.targetPosition=o,[e];if(n.start.hasSameParentAs(t.splitPosition)&&n.containsPosition(t.splitPosition)){let e=new sa(t.splitPosition,n.end);e=e._getTransformedBySplitOperation(t);return $h([new sa(n.start,t.splitPosition),e],o)}e.targetPosition.isEqual(t.splitPosition)&&"insertAtSource"==i.abRelation&&(o=t.moveTargetPosition),e.targetPosition.isEqual(t.insertionPosition)&&"insertBetween"==i.abRelation&&(o=e.targetPosition);const r=[n._getTransformedBySplitOperation(t)];if(t.graveyardPosition){const o=n.start.isEqual(t.graveyardPosition)||n.containsPosition(t.graveyardPosition);e.howMany>1&&o&&!i.aWasUndone&&r.push(sa._createFromPositionAndShift(t.insertionPosition,1))}return $h(r,o)}),Nh(El,Vl,(e,t,i)=>{const o=sa._createFromPositionAndShift(e.sourcePosition,e.howMany);if(t.deletionPosition.hasSameParentAs(e.sourcePosition)&&o.containsPosition(t.sourcePosition))if("remove"!=e.type||i.forceWeakRemove){if(1==e.howMany)return i.bWasUndone?(e.sourcePosition=t.graveyardPosition.clone(),e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),[e]):[new Xl(0)]}else if(!i.aWasUndone){const i=[];let o=t.graveyardPosition.clone(),n=t.targetPosition._getTransformedByMergeOperation(t);e.howMany>1&&(i.push(new El(e.sourcePosition,e.howMany-1,e.targetPosition,0)),o=o._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany-1),n=n._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany-1));const r=t.deletionPosition._getCombined(e.sourcePosition,e.targetPosition),s=new El(o,1,r,0),a=s.getMovedRangeStart().path.slice();a.push(0);const l=new ia(s.targetPosition.root,a);n=n._getTransformedByMove(o,r,1);const c=new El(n,t.howMany,l,0);return i.push(s),i.push(c),i}const n=sa._createFromPositionAndShift(e.sourcePosition,e.howMany)._getTransformedByMergeOperation(t);return e.sourcePosition=n.start,e.howMany=n.end.offset-n.start.offset,e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),[e]}),Nh(Rl,Pl,(e,t)=>(e.position=e.position._getTransformedByInsertOperation(t),[e])),Nh(Rl,Vl,(e,t)=>e.position.isEqual(t.deletionPosition)?(e.position=t.graveyardPosition.clone(),e.position.stickiness="toNext",[e]):(e.position=e.position._getTransformedByMergeOperation(t),[e])),Nh(Rl,El,(e,t)=>(e.position=e.position._getTransformedByMoveOperation(t),[e])),Nh(Rl,Rl,(e,t,i)=>{if(e.position.isEqual(t.position)){if(!i.aIsStrong)return[new Xl(0)];e.oldName=t.newName}return[e]}),Nh(Rl,zl,(e,t)=>{if("same"==lo(e.position.path,t.splitPosition.getParentPath())&&!t.graveyardPosition){const t=new Rl(e.position.getShiftedBy(1),e.oldName,e.newName,0);return[e,t]}return e.position=e.position._getTransformedBySplitOperation(t),[e]}),Nh(Il,Il,(e,t,i)=>{if(e.root===t.root&&e.key===t.key){if(!i.aIsStrong||e.newValue===t.newValue)return[new Xl(0)];e.oldValue=t.newValue}return[e]}),Nh(zl,Pl,(e,t)=>(e.splitPosition.hasSameParentAs(t.position)&&e.splitPosition.offset{if(!e.graveyardPosition&&!i.bWasUndone&&e.splitPosition.hasSameParentAs(t.sourcePosition)){const i=t.graveyardPosition.path.slice();i.push(0);const o=new ia(t.graveyardPosition.root,i),n=zl.getInsertionPosition(new ia(t.graveyardPosition.root,i)),r=new zl(o,0,n,null,0);return e.splitPosition=e.splitPosition._getTransformedByMergeOperation(t),e.insertionPosition=zl.getInsertionPosition(e.splitPosition),e.graveyardPosition=r.insertionPosition.clone(),e.graveyardPosition.stickiness="toNext",[r,e]}return e.splitPosition.hasSameParentAs(t.deletionPosition)&&!e.splitPosition.isAfter(t.deletionPosition)&&e.howMany--,e.splitPosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.splitPosition=e.splitPosition._getTransformedByMergeOperation(t),e.insertionPosition=zl.getInsertionPosition(e.splitPosition),e.graveyardPosition&&(e.graveyardPosition=e.graveyardPosition._getTransformedByMergeOperation(t)),[e]}),Nh(zl,El,(e,t,i)=>{const o=sa._createFromPositionAndShift(t.sourcePosition,t.howMany);if(e.graveyardPosition){const n=o.start.isEqual(e.graveyardPosition)||o.containsPosition(e.graveyardPosition);if(!i.bWasUndone&&n){const i=e.splitPosition._getTransformedByMoveOperation(t),o=e.graveyardPosition._getTransformedByMoveOperation(t),n=o.path.slice();n.push(0);const r=new ia(o.root,n);return[new El(i,e.howMany,r,0)]}e.graveyardPosition=e.graveyardPosition._getTransformedByMoveOperation(t)}const n=e.splitPosition.isEqual(t.targetPosition);if(n&&("insertAtSource"==i.baRelation||"splitBefore"==i.abRelation))return e.howMany+=t.howMany,e.splitPosition=e.splitPosition._getTransformedByDeletion(t.sourcePosition,t.howMany),e.insertionPosition=zl.getInsertionPosition(e.splitPosition),[e];if(n&&i.abRelation&&i.abRelation.howMany){const{howMany:t,offset:o}=i.abRelation;return e.howMany+=t,e.splitPosition=e.splitPosition.getShiftedBy(o),[e]}if(e.splitPosition.hasSameParentAs(t.sourcePosition)&&o.containsPosition(e.splitPosition)){const i=t.howMany-(e.splitPosition.offset-t.sourcePosition.offset);return e.howMany-=i,e.splitPosition.hasSameParentAs(t.targetPosition)&&e.splitPosition.offset{if(e.splitPosition.isEqual(t.splitPosition)){if(!e.graveyardPosition&&!t.graveyardPosition)return[new Xl(0)];if(e.graveyardPosition&&t.graveyardPosition&&e.graveyardPosition.isEqual(t.graveyardPosition))return[new Xl(0)];if("splitBefore"==i.abRelation)return e.howMany=0,e.graveyardPosition=e.graveyardPosition._getTransformedBySplitOperation(t),[e]}if(e.graveyardPosition&&t.graveyardPosition&&e.graveyardPosition.isEqual(t.graveyardPosition)){const o="$graveyard"==e.splitPosition.root.rootName,n="$graveyard"==t.splitPosition.root.rootName,r=o&&!n;if(n&&!o||!r&&i.aIsStrong){const i=[];return t.howMany&&i.push(new El(t.moveTargetPosition,t.howMany,t.splitPosition,0)),e.howMany&&i.push(new El(e.splitPosition,e.howMany,e.moveTargetPosition,0)),i}return[new Xl(0)]}if(e.graveyardPosition&&(e.graveyardPosition=e.graveyardPosition._getTransformedBySplitOperation(t)),e.splitPosition.isEqual(t.insertionPosition)&&"splitBefore"==i.abRelation)return e.howMany++,[e];if(t.splitPosition.isEqual(e.insertionPosition)&&"splitBefore"==i.baRelation){const i=t.insertionPosition.path.slice();i.push(0);const o=new ia(t.insertionPosition.root,i);return[e,new El(e.insertionPosition,1,o,0)]}return e.splitPosition.hasSameParentAs(t.splitPosition)&&e.splitPosition.offset{const{top:i,right:o,bottom:n,left:r}=t,s=[];return[i,o,r,n].every(e=>!!e)?s.push([e,bu(t)]):(i&&s.push([e+"-top",i]),o&&s.push([e+"-right",o]),n&&s.push([e+"-bottom",n]),r&&s.push([e+"-left",r])),s}}function bu({top:e,right:t,bottom:i,left:o}){const n=[];return o!==t?n.push(e,t,i,o):i!==e?n.push(e,t,i):t!==e?n.push(e,t):n.push(e),n.join(" ")}function wu(e){return t=>({path:e,value:fu(t)})}function ku(e){return e.replace(/, /g,",").split(" ").map(e=>e.replace(/,/g,", "))}function _u(e){e.setNormalizer("background",vu),e.setNormalizer("background-color",e=>({path:"background.color",value:e})),e.setReducer("background",e=>{const t=[];return t.push(["background-color",e.color]),t})}function vu(e){const t={},i=ku(e);for(const e of i)o=e,lu.includes(o)?(t.repeat=t.repeat||[],t.repeat.push(e)):du(e)?(t.position=t.position||[],t.position.push(e)):uu(e)?t.attachment=e:tu(e)?t.color=e:gu(e)&&(t.image=e);var o;return{path:"background",value:t}}function yu(e){e.setNormalizer("border",xu),e.setNormalizer("border-top",Cu("top")),e.setNormalizer("border-right",Cu("right")),e.setNormalizer("border-bottom",Cu("bottom")),e.setNormalizer("border-left",Cu("left")),e.setNormalizer("border-color",Au("color")),e.setNormalizer("border-width",Au("width")),e.setNormalizer("border-style",Au("style")),e.setNormalizer("border-top-color",Eu("color","top")),e.setNormalizer("border-top-style",Eu("style","top")),e.setNormalizer("border-top-width",Eu("width","top")),e.setNormalizer("border-right-color",Eu("color","right")),e.setNormalizer("border-right-style",Eu("style","right")),e.setNormalizer("border-right-width",Eu("width","right")),e.setNormalizer("border-bottom-color",Eu("color","bottom")),e.setNormalizer("border-bottom-style",Eu("style","bottom")),e.setNormalizer("border-bottom-width",Eu("width","bottom")),e.setNormalizer("border-left-color",Eu("color","left")),e.setNormalizer("border-left-style",Eu("style","left")),e.setNormalizer("border-left-width",Eu("width","left")),e.setExtractor("border-top",Pu("top")),e.setExtractor("border-right",Pu("right")),e.setExtractor("border-bottom",Pu("bottom")),e.setExtractor("border-left",Pu("left")),e.setExtractor("border-top-color","border.color.top"),e.setExtractor("border-right-color","border.color.right"),e.setExtractor("border-bottom-color","border.color.bottom"),e.setExtractor("border-left-color","border.color.left"),e.setExtractor("border-top-width","border.width.top"),e.setExtractor("border-right-width","border.width.right"),e.setExtractor("border-bottom-width","border.width.bottom"),e.setExtractor("border-left-width","border.width.left"),e.setExtractor("border-top-style","border.style.top"),e.setExtractor("border-right-style","border.style.right"),e.setExtractor("border-bottom-style","border.style.bottom"),e.setExtractor("border-left-style","border.style.left"),e.setReducer("border-color",pu("border-color")),e.setReducer("border-style",pu("border-style")),e.setReducer("border-width",pu("border-width")),e.setReducer("border-top",Vu("top")),e.setReducer("border-right",Vu("right")),e.setReducer("border-bottom",Vu("bottom")),e.setReducer("border-left",Vu("left")),e.setReducer("border",Iu),e.setStyleRelation("border",["border-color","border-style","border-width","border-top","border-right","border-bottom","border-left","border-top-color","border-right-color","border-bottom-color","border-left-color","border-top-style","border-right-style","border-bottom-style","border-left-style","border-top-width","border-right-width","border-bottom-width","border-left-width"]),e.setStyleRelation("border-color",["border-top-color","border-right-color","border-bottom-color","border-left-color"]),e.setStyleRelation("border-style",["border-top-style","border-right-style","border-bottom-style","border-left-style"]),e.setStyleRelation("border-width",["border-top-width","border-right-width","border-bottom-width","border-left-width"]),e.setStyleRelation("border-top",["border-top-color","border-top-style","border-top-width"]),e.setStyleRelation("border-right",["border-right-color","border-right-style","border-right-width"]),e.setStyleRelation("border-bottom",["border-bottom-color","border-bottom-style","border-bottom-width"]),e.setStyleRelation("border-left",["border-left-color","border-left-style","border-left-width"])}function xu(e){const{color:t,style:i,width:o}=Ru(e);return{path:"border",value:{color:fu(t),style:fu(i),width:fu(o)}}}function Cu(e){return t=>{const{color:i,style:o,width:n}=Ru(t),r={};return void 0!==i&&(r.color={[e]:i}),void 0!==o&&(r.style={[e]:o}),void 0!==n&&(r.width={[e]:n}),{path:"border",value:r}}}function Au(e){return t=>({path:"border",value:Tu(t,e)})}function Tu(e,t){return{[t]:fu(e)}}function Eu(e,t){return i=>({path:"border",value:{[e]:{[t]:i}}})}function Pu(e){return(t,i)=>{if(i.border)return Su(i.border,e)}}function Su(e,t){const i={};return e.width&&e.width[t]&&(i.width=e.width[t]),e.style&&e.style[t]&&(i.style=e.style[t]),e.color&&e.color[t]&&(i.color=e.color[t]),i}function Ru(e){const t={},i=ku(e);for(const e of i)ru(e)||/thin|medium|thick/.test(e)?t.width=e:ou(e)?t.style=e:t.color=e;return t}function Iu(e){const t=[];return t.push(...zu(Su(e,"top"),"top")),t.push(...zu(Su(e,"right"),"right")),t.push(...zu(Su(e,"bottom"),"bottom")),t.push(...zu(Su(e,"left"),"left")),t}function Vu(e){return t=>zu(t,e)}function zu(e,t){const i=[];return e&&void 0!==e.width&&i.push(e.width),e&&void 0!==e.style&&i.push(e.style),e&&void 0!==e.color&&i.push(e.color),i.length?[["border-"+t,i.join(" ")]]:[]}function Ou(e){e.setNormalizer("margin",wu("margin")),e.setNormalizer("margin-top",e=>({path:"margin.top",value:e})),e.setNormalizer("margin-right",e=>({path:"margin.right",value:e})),e.setNormalizer("margin-bottom",e=>({path:"margin.bottom",value:e})),e.setNormalizer("margin-left",e=>({path:"margin.left",value:e})),e.setReducer("margin",pu("margin")),e.setStyleRelation("margin",["margin-top","margin-right","margin-bottom","margin-left"])}function Mu(e){e.setNormalizer("padding",wu("padding")),e.setNormalizer("padding-top",e=>({path:"padding.top",value:e})),e.setNormalizer("padding-right",e=>({path:"padding.right",value:e})),e.setNormalizer("padding-bottom",e=>({path:"padding.bottom",value:e})),e.setNormalizer("padding-left",e=>({path:"padding.left",value:e})),e.setReducer("padding",pu("padding")),e.setStyleRelation("padding",["padding-top","padding-right","padding-bottom","padding-left"])}class Nu extends yc{constructor(e,t){super(e),this.view=t}get element(){return this.view.editable.element}init(){const e=this.editor,t=this.view,i=e.plugins.get("BalloonToolbar"),o=e.editing.view,n=t.editable,r=o.document.getRoot();n.name=r.rootName,t.render();const s=n.element;this.setEditableElement(n.name,s),this.focusTracker.add(s),n.bind("isFocused").to(this.focusTracker),o.attachDomRoot(s),function({origin:e,originKeystrokeHandler:t,originFocusTracker:i,toolbar:o,beforeFocus:n,afterBlur:r}){i.add(o.element),t.set("Alt+F10",(e,t)=>{i.isFocused&&!o.focusTracker.isFocused&&(n&&n(),o.focus(),t())}),o.keystrokes.set("Esc",(t,i)=>{o.focusTracker.isFocused&&(e.focus(),r&&r(),i())})}({origin:o,originFocusTracker:this.focusTracker,originKeystrokeHandler:e.keystrokes,toolbar:i.toolbarView,beforeFocus(){i.show()},afterBlur(){i.hide()}}),this._initPlaceholder(),this.fire("ready")}destroy(){const e=this.view;this.editor.editing.view.detachDomRoot(e.editable.name),e.destroy(),super.destroy()}_initPlaceholder(){const e=this.editor,t=e.editing.view,i=t.document.getRoot(),o=e.sourceElement,n=e.config.get("placeholder")||o&&"textarea"===o.tagName.toLowerCase()&&o.getAttribute("placeholder");n&&Rh({view:t,element:i,text:n,isDirectHost:!1,keepOnFocus:!0})}}class Bu extends ih{constructor(e,t,i){super(e),this.editable=new rh(e,t,i)}render(){super.render(),this.registerChild(this.editable)}}class Fu extends kc{constructor(e,t){super(t),Gi(e)&&(this.sourceElement=e,function(e){const t=e.sourceElement;if(t){if(t.ckeditorInstance)throw new l.a("editor-source-element-already-used",e);t.ckeditorInstance=e,e.once("destroy",()=>{delete t.ckeditorInstance})}}(this));const i=this.config.get("plugins");i.push(Ch),this.config.set("plugins",i),this.config.define("balloonToolbar",this.config.get("toolbar")),this.model.document.createRoot();const o=new Bu(this.locale,this.editing.view,this.sourceElement);this.ui=new Nu(this,o),function(e){if(!I(e.updateSourceElement))throw new l.a("attachtoform-missing-elementapi-interface",e);const t=e.sourceElement;if(t&&"textarea"===t.tagName.toLowerCase()&&t.form){let i;const o=t.form,n=()=>e.updateSourceElement();I(o.submit)&&(i=o.submit,o.submit=()=>{n(),i.apply(o)}),o.addEventListener("submit",n),e.on("destroy",()=>{o.removeEventListener("submit",n),i&&(o.submit=i)})}}(this)}destroy(){const e=this.getData();return this.ui.destroy(),super.destroy().then(()=>{this.sourceElement&&Vs(this.sourceElement,e)})}static create(e,t={}){return new Promise(i=>{const o=Gi(e);if(o&&"TEXTAREA"===e.tagName)throw new l.a("editor-wrong-element",null);const n=new this(e,t);i(n.initPlugins().then(()=>{n.ui.init()}).then(()=>{if(!o&&t.initialData)throw new l.a("editor-create-initial-data",null);const i=void 0!==t.initialData?t.initialData:function(e){return Gi(e)?(t=e,t instanceof HTMLTextAreaElement?t.value:t.innerHTML):e;var t}(e);return n.data.init(i)}).then(()=>n.fire("ready")).then(()=>n))})}}Ye(Fu,xc),Ye(Fu,Cc);class Du{constructor(){const e=new window.FileReader;this._reader=e,this._data=void 0,this.set("loaded",0),e.onprogress=e=>{this.loaded=e.loaded}}get error(){return this._reader.error}get data(){return this._data}read(e){const t=this._reader;return this.total=e.size,new Promise((i,o)=>{t.onload=()=>{const e=t.result;this._data=e,i(e)},t.onerror=()=>{o("error")},t.onabort=()=>{o("aborted")},this._reader.readAsDataURL(e)})}abort(){this._reader.abort()}}Ye(Du,qe);class Lu extends Qe{static get pluginName(){return"FileRepository"}static get requires(){return[Ac]}init(){this.loaders=new Zi,this.loaders.on("add",()=>this._updatePendingAction()),this.loaders.on("remove",()=>this._updatePendingAction()),this._loadersMap=new Map,this._pendingAction=null,this.set("uploaded",0),this.set("uploadTotal",null),this.bind("uploadedPercent").to(this,"uploaded",this,"uploadTotal",(e,t)=>t?e/t*100:0)}getLoader(e){return this._loadersMap.get(e)||null}createLoader(e){if(!this.createUploadAdapter)return Object(l.b)("filerepository-no-upload-adapter"),null;const t=new Hu(Promise.resolve(e),this.createUploadAdapter);return this.loaders.add(t),this._loadersMap.set(e,t),e instanceof Promise&&t.file.then(e=>{this._loadersMap.set(e,t)}).catch(()=>{}),t.on("change:uploaded",()=>{let e=0;for(const t of this.loaders)e+=t.uploaded;this.uploaded=e}),t.on("change:uploadTotal",()=>{let e=0;for(const t of this.loaders)t.uploadTotal&&(e+=t.uploadTotal);this.uploadTotal=e}),t}destroyLoader(e){const t=e instanceof Hu?e:this.getLoader(e);t._destroy(),this.loaders.remove(t),this._loadersMap.forEach((e,i)=>{e===t&&this._loadersMap.delete(i)})}_updatePendingAction(){const e=this.editor.plugins.get(Ac);if(this.loaders.length){if(!this._pendingAction){const t=this.editor.t,i=e=>`${t("Upload in progress")} ${parseInt(e)}%.`;this._pendingAction=e.add(i(this.uploadedPercent)),this._pendingAction.bind("message").to(this,"uploadedPercent",i)}}else e.remove(this._pendingAction),this._pendingAction=null}}Ye(Lu,qe);class Hu{constructor(e,t){this.id=s(),this._filePromiseWrapper=this._createFilePromiseWrapper(e),this._adapter=t(this),this._reader=new Du,this.set("status","idle"),this.set("uploaded",0),this.set("uploadTotal",null),this.bind("uploadedPercent").to(this,"uploaded",this,"uploadTotal",(e,t)=>t?e/t*100:0),this.set("uploadResponse",null)}get file(){return this._filePromiseWrapper?this._filePromiseWrapper.promise.then(e=>this._filePromiseWrapper?e:null):Promise.resolve(null)}get data(){return this._reader.data}read(){if("idle"!=this.status)throw new l.a("filerepository-read-wrong-status",this);return this.status="reading",this.file.then(e=>this._reader.read(e)).then(e=>{if("reading"!==this.status)throw this.status;return this.status="idle",e}).catch(e=>{if("aborted"===e)throw this.status="aborted","aborted";throw this.status="error",this._reader.error?this._reader.error:e})}upload(){if("idle"!=this.status)throw new l.a("filerepository-upload-wrong-status",this);return this.status="uploading",this.file.then(()=>this._adapter.upload()).then(e=>(this.uploadResponse=e,this.status="idle",e)).catch(e=>{if("aborted"===this.status)throw"aborted";throw this.status="error",e})}abort(){const e=this.status;this.status="aborted",this._filePromiseWrapper.isFulfilled?"reading"==e?this._reader.abort():"uploading"==e&&this._adapter.abort&&this._adapter.abort():(this._filePromiseWrapper.promise.catch(()=>{}),this._filePromiseWrapper.rejecter("aborted")),this._destroy()}_destroy(){this._filePromiseWrapper=void 0,this._reader=void 0,this._adapter=void 0,this.uploadResponse=void 0}_createFilePromiseWrapper(e){const t={};return t.promise=new Promise((i,o)=>{t.rejecter=o,t.isFulfilled=!1,e.then(e=>{t.isFulfilled=!0,i(e)}).catch(e=>{t.isFulfilled=!0,o(e)})}),t}}Ye(Hu,qe);class ju extends id{constructor(e){super(e),this.buttonView=new Ad(e),this._fileInputView=new Wu(e),this._fileInputView.bind("acceptedType").to(this),this._fileInputView.bind("allowMultipleFiles").to(this),this._fileInputView.delegate("done").to(this),this.setTemplate({tag:"span",attributes:{class:"ck-file-dialog-button"},children:[this.buttonView,this._fileInputView]}),this.buttonView.on("execute",()=>{this._fileInputView.open()})}focus(){this.buttonView.focus()}}class Wu extends id{constructor(e){super(e),this.set("acceptedType"),this.set("allowMultipleFiles",!1);const t=this.bindTemplate;this.setTemplate({tag:"input",attributes:{class:["ck-hidden"],type:"file",tabindex:"-1",accept:t.to("acceptedType"),multiple:t.to("allowMultipleFiles")},on:{change:t.to(()=>{this.element&&this.element.files&&this.element.files.length&&this.fire("done",this.element.files),this.element.value=""})}})}open(){this.element.click()}}function qu(){let e=function(e){e=e.toLowerCase();const t=document.cookie.split(";");for(const i of t){const t=i.split("=");if(decodeURIComponent(t[0].trim().toLowerCase())===e)return decodeURIComponent(t[1])}return null}("ckCsrfToken");var t,i;return e&&40==e.length||(e=function(e){let t="";const i=new Uint8Array(e);window.crypto.getRandomValues(i);for(let e=0;e.5?o.toUpperCase():o}return t}(40),t="ckCsrfToken",i=e,document.cookie=encodeURIComponent(t)+"="+encodeURIComponent(i)+";path=/"),e}class $u{constructor(e,t,i){this.loader=e,this.url=t,this.t=i}upload(){return this.loader.file.then(e=>new Promise((t,i)=>{this._initRequest(),this._initListeners(t,i,e),this._sendRequest(e)}))}abort(){this.xhr&&this.xhr.abort()}_initRequest(){const e=this.xhr=new XMLHttpRequest;e.open("POST",this.url,!0),e.responseType="json"}_initListeners(e,t,i){const o=this.xhr,n=this.loader,r=(0,this.t)("Cannot upload file:")+` ${i.name}.`;o.addEventListener("error",()=>t(r)),o.addEventListener("abort",()=>t()),o.addEventListener("load",()=>{const i=o.response;if(!i||!i.uploaded)return t(i&&i.error&&i.error.message?i.error.message:r);e({default:i.url})}),o.upload&&o.upload.addEventListener("progress",e=>{e.lengthComputable&&(n.uploadTotal=e.total,n.uploaded=e.loaded)})}_sendRequest(e){const t=new FormData;t.append("upload",e),t.append("ckCsrfToken",qu()),this.xhr.send(t)}}function Uu(e,t,i,o){let n,r=null;"function"==typeof o?n=o:(r=e.commands.get(o),n=()=>{e.execute(o)}),e.model.document.on("change:data",(s,a)=>{if(r&&!r.isEnabled||!t.isEnabled)return;const l=Os(e.model.document.selection.getRanges());if(!l.isCollapsed)return;if("transparent"==a.type)return;const c=Array.from(e.model.document.differ.getChanges()),d=c[0];if(1!=c.length||"insert"!==d.type||"$text"!=d.name||1!=d.length)return;const h=d.position.parent;if(h.is("element","codeBlock"))return;if(h.is("element","listItem")&&"function"!=typeof o&&!["numberedList","bulletedList","todoList"].includes(o))return;if(r&&!0===r.value)return;const u=h.getChild(0),m=e.model.createRangeOn(u);if(!m.containsRange(l)&&!l.end.isEqual(m.end))return;const g=i.exec(u.data.substr(0,l.end.offset));g&&e.model.enqueueChange(t=>{const i=t.createPositionAt(h,0),o=t.createPositionAt(h,g[0].length),r=new ka(i,o);if(!1!==n({match:g})){t.remove(r);const i=e.model.document.selection.getFirstRange(),o=t.createRangeIn(h);!h.isEmpty||o.isEqual(i)||o.containsRange(i,!0)||t.remove(h)}r.detach()})})}function Ku(e,t,i,o){let n,r;i instanceof RegExp?n=i:r=i,r=r||(e=>{let t;const i=[],o=[];for(;null!==(t=n.exec(e))&&!(t&&t.length<4);){let{index:e,1:n,2:r,3:s}=t;const a=n+r+s;e+=t[0].length-a.length;const l=[e,e+n.length],c=[e+n.length+r.length,e+n.length+r.length+s.length];i.push(l),i.push(c),o.push([e+n.length,e+n.length+r.length])}return{remove:i,format:o}}),e.model.document.on("change:data",(i,n)=>{if("transparent"==n.type||!t.isEnabled)return;const s=e.model,a=s.document.selection;if(!a.isCollapsed)return;const l=Array.from(s.document.differ.getChanges()),c=l[0];if(1!=l.length||"insert"!==c.type||"$text"!=c.name||1!=c.length)return;const d=a.focus,h=d.parent,{text:u,range:m}=function(e,t){let i=e.start;return{text:Array.from(e.getItems()).reduce((e,o)=>!o.is("$text")&&!o.is("$textProxy")||o.getAttribute("code")?(i=t.createPositionAfter(o),""):e+o.data,""),range:t.createRange(i,e.end)}}(s.createRange(s.createPositionAt(h,0),d),s),g=r(u),f=Gu(m.start,g.format,s),p=Gu(m.start,g.remove,s);f.length&&p.length&&s.enqueueChange(e=>{if(!1!==o(e,f))for(const t of p.reverse())e.remove(t)})})}function Gu(e,t,i){return t.filter(e=>void 0!==e[0]&&void 0!==e[1]).map(t=>i.createRange(e.getShiftedBy(t[0]),e.getShiftedBy(t[1])))}function Ju(e,t){return(i,o)=>{if(!e.commands.get(t).isEnabled)return!1;const n=e.model.schema.getValidRanges(o,t);for(const e of n)i.setAttribute(t,!0,e);i.removeSelectionAttribute(t)}}class Yu extends Ze{constructor(e,t){super(e),this.attributeKey=t}refresh(){const e=this.editor.model,t=e.document;this.value=this._getValueFromFirstAllowedNode(),this.isEnabled=e.schema.checkAttributeInSelection(t.selection,this.attributeKey)}execute(e={}){const t=this.editor.model,i=t.document.selection,o=void 0===e.forceValue?!this.value:e.forceValue;t.change(e=>{if(i.isCollapsed)o?e.setSelectionAttribute(this.attributeKey,!0):e.removeSelectionAttribute(this.attributeKey);else{const n=t.schema.getValidRanges(i.getRanges(),this.attributeKey);for(const t of n)o?e.setAttribute(this.attributeKey,o,t):e.removeAttribute(this.attributeKey,t)}})}_getValueFromFirstAllowedNode(){const e=this.editor.model,t=e.schema,i=e.document.selection;if(i.isCollapsed)return i.hasAttribute(this.attributeKey);for(const e of i.getRanges())for(const i of e.getItems())if(t.checkAttribute(i,this.attributeKey))return i.hasAttribute(this.attributeKey);return!1}}class Qu extends Qe{static get pluginName(){return"BoldEditing"}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:"bold"}),e.model.schema.setAttributeProperties("bold",{isFormatting:!0,copyOnEnter:!0}),e.conversion.attributeToElement({model:"bold",view:"strong",upcastAlso:["b",e=>{const t=e.getStyle("font-weight");return t?"bold"==t||Number(t)>=600?{name:!0,styles:["font-weight"]}:void 0:null}]}),e.commands.add("bold",new Yu(e,"bold")),e.keystrokes.set("CTRL+B","bold")}}class Xu extends Qe{static get pluginName(){return"BoldUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("bold",i=>{const o=e.commands.get("bold"),n=new Ad(i);return n.set({label:t("Bold"),icon:'',keystroke:"CTRL+B",tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("bold"),e.editing.view.focus()}),n})}}class Zu extends Qe{static get pluginName(){return"ItalicEditing"}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:"italic"}),e.model.schema.setAttributeProperties("italic",{isFormatting:!0,copyOnEnter:!0}),e.conversion.attributeToElement({model:"italic",view:"i",upcastAlso:["em",{styles:{"font-style":"italic"}}]}),e.commands.add("italic",new Yu(e,"italic")),e.keystrokes.set("CTRL+I","italic")}}class em extends Qe{static get pluginName(){return"ItalicUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("italic",i=>{const o=e.commands.get("italic"),n=new Ad(i);return n.set({label:t("Italic"),icon:'',keystroke:"CTRL+I",tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("italic"),e.editing.view.focus()}),n})}}class tm extends Qe{static get pluginName(){return"SuperscriptEditing"}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:"superscript"}),e.model.schema.setAttributeProperties("superscript",{isFormatting:!0,copyOnEnter:!0}),e.conversion.attributeToElement({model:"superscript",view:"sup",upcastAlso:[{styles:{"vertical-align":"super"}}]}),e.commands.add("superscript",new Yu(e,"superscript"))}}class im extends Qe{static get pluginName(){return"SuperscriptUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("superscript",i=>{const o=e.commands.get("superscript"),n=new Ad(i);return n.set({label:t("Superscript"),icon:'',tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("superscript"),e.editing.view.focus()}),n})}}class om extends Qe{static get pluginName(){return"SubscriptEditing"}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:"subscript"}),e.model.schema.setAttributeProperties("subscript",{isFormatting:!0,copyOnEnter:!0}),e.conversion.attributeToElement({model:"subscript",view:"sub",upcastAlso:[{styles:{"vertical-align":"sub"}}]}),e.commands.add("subscript",new Yu(e,"subscript"))}}class nm extends Qe{static get pluginName(){return"SubscriptUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("subscript",i=>{const o=e.commands.get("subscript"),n=new Ad(i);return n.set({label:t("Subscript"),icon:'',tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("subscript"),e.editing.view.focus()}),n})}}class rm extends Qe{static get pluginName(){return"UnderlineEditing"}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:"underline"}),e.model.schema.setAttributeProperties("underline",{isFormatting:!0,copyOnEnter:!0}),e.conversion.attributeToElement({model:"underline",view:"u",upcastAlso:{styles:{"text-decoration":"underline"}}}),e.commands.add("underline",new Yu(e,"underline")),e.keystrokes.set("CTRL+U","underline")}}class sm extends Qe{static get pluginName(){return"UnderlineUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("underline",i=>{const o=e.commands.get("underline"),n=new Ad(i);return n.set({label:t("Underline"),icon:'',keystroke:"CTRL+U",tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("underline"),e.editing.view.focus()}),n})}}class am extends Qe{static get pluginName(){return"StrikethroughEditing"}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:"strikethrough"}),e.model.schema.setAttributeProperties("strikethrough",{isFormatting:!0,copyOnEnter:!0}),e.conversion.attributeToElement({model:"strikethrough",view:"s",upcastAlso:["del","strike",{styles:{"text-decoration":"line-through"}}]}),e.commands.add("strikethrough",new Yu(e,"strikethrough")),e.keystrokes.set("CTRL+SHIFT+X","strikethrough")}}class lm extends Qe{static get pluginName(){return"StrikethroughUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("strikethrough",i=>{const o=e.commands.get("strikethrough"),n=new Ad(i);return n.set({label:t("Strikethrough"),icon:'',keystroke:"CTRL+SHIFT+X",tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("strikethrough"),e.editing.view.focus()}),n})}}class cm{constructor(e,t=20){this.model=e,this.size=0,this.limit=t,this.isLocked=!1,this._changeCallback=(e,t)=>{"transparent"!=t.type&&t!==this._batch&&this._reset(!0)},this._selectionChangeCallback=()=>{this._reset()},this.model.document.on("change",this._changeCallback),this.model.document.selection.on("change:range",this._selectionChangeCallback),this.model.document.selection.on("change:attribute",this._selectionChangeCallback)}get batch(){return this._batch||(this._batch=this.model.createBatch()),this._batch}input(e){this.size+=e,this.size>=this.limit&&this._reset(!0)}lock(){this.isLocked=!0}unlock(){this.isLocked=!1}destroy(){this.model.document.off("change",this._changeCallback),this.model.document.selection.off("change:range",this._selectionChangeCallback),this.model.document.selection.off("change:attribute",this._selectionChangeCallback)}_reset(e){this.isLocked&&!e||(this._batch=null,this.size=0)}}class dm extends Ze{constructor(e,t){super(e),this._buffer=new cm(e.model,t),this._batches=new WeakSet}get buffer(){return this._buffer}destroy(){super.destroy(),this._buffer.destroy()}execute(e={}){const t=this.editor.model,i=t.document,o=e.text||"",n=o.length,r=e.range?t.createSelection(e.range):i.selection,s=e.resultRange;t.enqueueChange(this._buffer.batch,e=>{this._buffer.lock(),this._batches.add(this._buffer.batch),t.deleteContent(r),o&&t.insertContent(e.createText(o,i.selection.getAttributes()),r),s?e.setSelection(s):r.is("documentSelection")||e.setSelection(r),this._buffer.unlock(),this._buffer.input(n)})}}const hm=[On("arrowUp"),On("arrowRight"),On("arrowDown"),On("arrowLeft"),9,16,17,18,19,20,27,33,34,35,36,45,91,93,144,145,173,174,175,176,177,178,179,255];for(let e=112;e<=135;e++)hm.push(e);function um(e){return!(!e.ctrlKey&&!e.metaKey)||hm.includes(e.keyCode)}function mm(e){if(e.newChildren.length-e.oldChildren.length!=1)return;const t=function(e,t){const i=[];let o,n=0;return e.forEach(e=>{"equal"==e?(r(),n++):"insert"==e?(s("insert")?o.values.push(t[n]):(r(),o={type:"insert",index:n,values:[t[n]]}),n++):s("delete")?o.howMany++:(r(),o={type:"delete",index:n,howMany:1})}),r(),i;function r(){o&&(i.push(o),o=null)}function s(e){return o&&o.type==e}}(mr(e.oldChildren,e.newChildren,gm),e.newChildren);if(t.length>1)return;const i=t[0];return i.values[0]&&i.values[0].is("$text")?i:void 0}function gm(e,t){return e&&e.is("$text")&&t&&t.is("$text")?e.data===t.data:e===t}class fm{constructor(e){this.editor=e,this.editing=this.editor.editing}handle(e,t){if(function(e){if(0==e.length)return!1;for(const t of e)if("children"===t.type&&!mm(t))return!0;return!1}(e))this._handleContainerChildrenMutations(e,t);else for(const i of e)this._handleTextMutation(i,t),this._handleTextNodeInsertion(i)}_handleContainerChildrenMutations(e,t){const i=function(e){const t=e.map(e=>e.node).reduce((e,t)=>e.getCommonAncestor(t,{includeSelf:!0}));if(!t)return;return t.getAncestors({includeSelf:!0,parentFirst:!0}).find(e=>e.is("containerElement")||e.is("rootElement"))}(e);if(!i)return;const o=this.editor.editing.view.domConverter.mapViewToDom(i),n=new Er(this.editor.editing.view.document),r=this.editor.data.toModel(n.domToView(o)).getChild(0),s=this.editor.editing.mapper.toModelElement(i);if(!s)return;const a=Array.from(r.getChildren()),l=Array.from(s.getChildren()),c=a[a.length-1],d=l[l.length-1],h=c&&c.is("element","softBreak"),u=d&&!d.is("element","softBreak");h&&u&&a.pop();const m=this.editor.model.schema;if(!pm(a,m)||!pm(l,m))return;const g=a.map(e=>e.is("$text")?e.data:"@").join("").replace(/\u00A0/g," "),f=l.map(e=>e.is("$text")?e.data:"@").join("").replace(/\u00A0/g," ");if(f===g)return;const p=mr(f,g),{firstChangeAt:b,insertions:w,deletions:k}=bm(p);let _=null;t&&(_=this.editing.mapper.toModelRange(t.getFirstRange()));const v=g.substr(b,w),y=this.editor.model.createRange(this.editor.model.createPositionAt(s,b),this.editor.model.createPositionAt(s,b+k));this.editor.execute("input",{text:v,range:y,resultRange:_})}_handleTextMutation(e,t){if("text"!=e.type)return;const i=e.newText.replace(/\u00A0/g," "),o=e.oldText.replace(/\u00A0/g," ");if(o===i)return;const n=mr(o,i),{firstChangeAt:r,insertions:s,deletions:a}=bm(n);let l=null;t&&(l=this.editing.mapper.toModelRange(t.getFirstRange()));const c=this.editing.view.createPositionAt(e.node,r),d=this.editing.mapper.toModelPosition(c),h=this.editor.model.createRange(d,d.getShiftedBy(a)),u=i.substr(r,s);this.editor.execute("input",{text:u,range:h,resultRange:l})}_handleTextNodeInsertion(e){if("children"!=e.type)return;const t=mm(e),i=this.editing.view.createPositionAt(e.node,t.index),o=this.editing.mapper.toModelPosition(i),n=t.values[0].data;this.editor.execute("input",{text:n.replace(/\u00A0/g," "),range:this.editor.model.createRange(o)})}}function pm(e,t){return e.every(e=>t.isInline(e))}function bm(e){let t=null,i=null;for(let o=0;o{i.deleteContent(i.document.selection)}),e.unlock()}Sn.isAndroid?o.document.on("beforeinput",(e,t)=>r(t),{priority:"lowest"}):o.document.on("keydown",(e,t)=>r(t),{priority:"lowest"}),o.document.on("compositionstart",(function(){const e=i.document,t=1!==e.selection.rangeCount||e.selection.getFirstRange().isFlat;if(e.selection.isCollapsed||t)return;s()}),{priority:"lowest"}),o.document.on("compositionend",()=>{t=i.createSelection(i.document.selection)},{priority:"lowest"})}(e),function(e){e.editing.view.document.on("mutations",(t,i,o)=>{new fm(e).handle(i,o)})}(e)}isInput(e){return this.editor.commands.get("input")._batches.has(e)}}class km extends Ze{constructor(e,t){super(e),this.direction=t,this._buffer=new cm(e.model,e.config.get("typing.undoStep"))}get buffer(){return this._buffer}execute(e={}){const t=this.editor.model,i=t.document;t.enqueueChange(this._buffer.batch,o=>{this._buffer.lock();const n=o.createSelection(e.selection||i.selection),r=e.sequence||1,s=n.isCollapsed;if(n.isCollapsed&&t.modifySelection(n,{direction:this.direction,unit:e.unit}),this._shouldEntireContentBeReplacedWithParagraph(r))return void this._replaceEntireContentWithParagraph(o);if(this._shouldReplaceFirstBlockWithParagraph(n,r))return void this.editor.execute("paragraph",{selection:n});if(n.isCollapsed)return;let a=0;n.getFirstRange().getMinimalFlatRanges().forEach(e=>{a+=un(e.getWalker({singleCharacters:!0,ignoreElementEnd:!0,shallow:!0}))}),t.deleteContent(n,{doNotResetEntireContent:s,direction:this.direction}),this._buffer.input(a),o.setSelection(n),this._buffer.unlock()})}_shouldEntireContentBeReplacedWithParagraph(e){if(e>1)return!1;const t=this.editor.model,i=t.document.selection,o=t.schema.getLimitElement(i);if(!(i.isCollapsed&&i.containsEntireContent(o)))return!1;if(!t.schema.checkChild(o,"paragraph"))return!1;const n=o.getChild(0);return!n||"paragraph"!==n.name}_replaceEntireContentWithParagraph(e){const t=this.editor.model,i=t.document.selection,o=t.schema.getLimitElement(i),n=e.createElement("paragraph");e.remove(e.createRangeIn(o)),e.insert(n,o),e.setSelection(n,0)}_shouldReplaceFirstBlockWithParagraph(e,t){const i=this.editor.model;if(t>1||"backward"!=this.direction)return!1;if(!e.isCollapsed)return!1;const o=e.getFirstPosition(),n=i.schema.getLimitElement(o),r=n.getChild(0);return o.parent==r&&(!!e.containsEntireContent(r)&&(!!i.schema.checkChild(n,"paragraph")&&"paragraph"!=r.name))}}class _m extends Mr{constructor(e){super(e);const t=e.document;let i=0;function o(e,i,o){const n=new fn(t,"delete",t.selection.getFirstRange());t.fire(n,new ts(t,i,o)),n.stop.called&&e.stop()}t.on("keyup",(e,t)=>{t.keyCode!=Vn.delete&&t.keyCode!=Vn.backspace||(i=0)}),t.on("keydown",(e,t)=>{const n={};if(t.keyCode==Vn.delete)n.direction="forward",n.unit="character";else{if(t.keyCode!=Vn.backspace)return;n.direction="backward",n.unit="codePoint"}const r=Sn.isMac?t.altKey:t.ctrlKey;n.unit=r?"word":n.unit,n.sequence=++i,o(e,t.domEvent,n)}),Sn.isAndroid&&t.on("beforeinput",(t,i)=>{if("deleteContentBackward"!=i.domEvent.inputType)return;const n={unit:"codepoint",direction:"backward",sequence:1},r=i.domTarget.ownerDocument.defaultView.getSelection();r.anchorNode==r.focusNode&&r.anchorOffset+1!=r.focusOffset&&(n.selectionToRemove=e.domConverter.domSelectionToView(r)),o(t,i.domEvent,n)})}observe(){}}class vm extends Qe{static get pluginName(){return"Delete"}init(){const e=this.editor,t=e.editing.view,i=t.document;t.addObserver(_m);const o=new km(e,"forward");if(e.commands.add("deleteForward",o),e.commands.add("forwardDelete",o),e.commands.add("delete",new km(e,"backward")),this.listenTo(i,"delete",(i,o)=>{const n={unit:o.unit,sequence:o.sequence};if(o.selectionToRemove){const t=e.model.createSelection(),i=[];for(const t of o.selectionToRemove.getRanges())i.push(e.editing.mapper.toModelRange(t));t.setTo(i),n.selection=t}e.execute("forward"==o.direction?"deleteForward":"delete",n),o.preventDefault(),t.scrollToTheSelection()},{priority:"low"}),Sn.isAndroid){let e=null;this.listenTo(i,"delete",(t,i)=>{const o=i.domTarget.ownerDocument.defaultView.getSelection();e={anchorNode:o.anchorNode,anchorOffset:o.anchorOffset,focusNode:o.focusNode,focusOffset:o.focusOffset}},{priority:"lowest"}),this.listenTo(i,"keyup",(t,i)=>{if(e){const t=i.domTarget.ownerDocument.defaultView.getSelection();t.collapse(e.anchorNode,e.anchorOffset),t.extend(e.focusNode,e.focusOffset),e=null}})}}}function ym(e,t){let i=e.start;return{text:Array.from(e.getItems()).reduce((e,o)=>o.is("$text")||o.is("$textProxy")?e+o.data:(i=t.createPositionAfter(o),""),""),range:t.createRange(i,e.end)}}class xm{constructor(e,t){this.model=e,this.testCallback=t,this.hasMatch=!1,this.set("isEnabled",!0),this.on("change:isEnabled",()=>{this.isEnabled?this._startListening():(this.stopListening(e.document.selection),this.stopListening(e.document))}),this._startListening()}_startListening(){const e=this.model.document;this.listenTo(e.selection,"change:range",(t,{directChange:i})=>{i&&(e.selection.isCollapsed?this._evaluateTextBeforeSelection("selection"):this.hasMatch&&(this.fire("unmatched"),this.hasMatch=!1))}),this.listenTo(e,"change:data",(e,t)=>{"transparent"!=t.type&&this._evaluateTextBeforeSelection("data",{batch:t})})}_evaluateTextBeforeSelection(e,t={}){const i=this.model,o=i.document.selection,n=i.createRange(i.createPositionAt(o.focus.parent,0),o.focus),{text:r,range:s}=ym(n,i),a=this.testCallback(r);if(!a&&this.hasMatch&&this.fire("unmatched"),this.hasMatch=!!a,a){const i=Object.assign(t,{text:r,range:s});"object"==typeof a&&Object.assign(i,a),this.fire("matched:"+e,i)}}}Ye(xm,qe);class Cm extends Qe{static get pluginName(){return"TwoStepCaretMovement"}constructor(e){super(e),this.attributes=new Set,this._overrideUid=null}init(){const e=this.editor,t=e.model,i=e.editing.view,o=e.locale,n=t.document.selection;this.listenTo(i.document,"arrowKey",(e,t)=>{if(!n.isCollapsed)return;if(t.shiftKey||t.altKey||t.ctrlKey)return;const i=t.keyCode==Vn.arrowright,r=t.keyCode==Vn.arrowleft;if(!i&&!r)return;const s=o.contentLanguageDirection;let a=!1;a="ltr"===s&&i||"rtl"===s&&r?this._handleForwardMovement(t):this._handleBackwardMovement(t),!0===a&&e.stop()},{context:"$text",priority:"highest"}),this._isNextGravityRestorationSkipped=!1,this.listenTo(n,"change:range",(e,t)=>{this._isNextGravityRestorationSkipped?this._isNextGravityRestorationSkipped=!1:this._isGravityOverridden&&(!t.directChange&&Pm(n.getFirstPosition(),this.attributes)||this._restoreGravity())})}registerAttribute(e){this.attributes.add(e)}_handleForwardMovement(e){const t=this.attributes,i=this.editor.model.document.selection,o=i.getFirstPosition();return!this._isGravityOverridden&&((!o.isAtStart||!Am(i,t))&&(Pm(o,t)?(Em(e),this._overrideGravity(),!0):void 0))}_handleBackwardMovement(e){const t=this.attributes,i=this.editor.model,o=i.document.selection,n=o.getFirstPosition();return this._isGravityOverridden?(Em(e),this._restoreGravity(),Tm(i,t,n),!0):n.isAtStart?!!Am(o,t)&&(Em(e),Tm(i,t,n),!0):function(e,t){return Pm(e.getShiftedBy(-1),t)}(n,t)?n.isAtEnd&&!Am(o,t)&&Pm(n,t)?(Em(e),Tm(i,t,n),!0):(this._isNextGravityRestorationSkipped=!0,this._overrideGravity(),!1):void 0}get _isGravityOverridden(){return!!this._overrideUid}_overrideGravity(){this._overrideUid=this.editor.model.change(e=>e.overrideSelectionGravity())}_restoreGravity(){this.editor.model.change(e=>{e.restoreSelectionGravity(this._overrideUid),this._overrideUid=null})}}function Am(e,t){for(const i of t)if(e.hasAttribute(i))return!0;return!1}function Tm(e,t,i){const o=i.nodeBefore;e.change(e=>{o?e.setSelectionAttribute(o.getAttributes()):e.removeSelectionAttribute(t)})}function Em(e){e.preventDefault()}function Pm(e,t){const{nodeBefore:i,nodeAfter:o}=e;for(const e of t){const t=i?i.getAttribute(e):void 0;if((o?o.getAttribute(e):void 0)!==t)return!0}return!1}var Sm=/[\\^$.*+?()[\]{}|]/g,Rm=RegExp(Sm.source);var Im=function(e){return(e=Ro(e))&&Rm.test(e)?e.replace(Sm,"\\$&"):e};const Vm={copyright:{from:"(c)",to:"©"},registeredTrademark:{from:"(r)",to:"®"},trademark:{from:"(tm)",to:"™"},oneHalf:{from:"1/2",to:"½"},oneThird:{from:"1/3",to:"⅓"},twoThirds:{from:"2/3",to:"⅔"},oneForth:{from:"1/4",to:"¼"},threeQuarters:{from:"3/4",to:"¾"},lessThanOrEqual:{from:"<=",to:"≤"},greaterThanOrEqual:{from:">=",to:"≥"},notEqual:{from:"!=",to:"≠"},arrowLeft:{from:"<-",to:"←"},arrowRight:{from:"->",to:"→"},horizontalEllipsis:{from:"...",to:"…"},enDash:{from:/(^| )(--)( )$/,to:[null,"–",null]},emDash:{from:/(^| )(---)( )$/,to:[null,"—",null]},quotesPrimary:{from:Fm('"'),to:[null,"“",null,"”"]},quotesSecondary:{from:Fm("'"),to:[null,"‘",null,"’"]},quotesPrimaryEnGb:{from:Fm("'"),to:[null,"‘",null,"’"]},quotesSecondaryEnGb:{from:Fm('"'),to:[null,"“",null,"”"]},quotesPrimaryPl:{from:Fm('"'),to:[null,"„",null,"”"]},quotesSecondaryPl:{from:Fm("'"),to:[null,"‚",null,"’"]}},zm={symbols:["copyright","registeredTrademark","trademark"],mathematical:["oneHalf","oneThird","twoThirds","oneForth","threeQuarters","lessThanOrEqual","greaterThanOrEqual","notEqual","arrowLeft","arrowRight"],typography:["horizontalEllipsis","enDash","emDash"],quotes:["quotesPrimary","quotesSecondary"]},Om=["symbols","mathematical","typography","quotes"];function Mm(e){return"string"==typeof e?new RegExp(`(${Im(e)})$`):e}function Nm(e){return"string"==typeof e?()=>[e]:e instanceof Array?()=>e:e}function Bm(e){return(e.textNode?e.textNode:e.nodeAfter).getAttributes()}function Fm(e){return new RegExp(`(^|\\s)(${e})([^${e}]*)(${e})$`)}function Dm(e,t,i,o){return o.createRange(Lm(e,t,i,!0,o),Lm(e,t,i,!1,o))}function Lm(e,t,i,o,n){let r=e.textNode||(o?e.nodeBefore:e.nodeAfter),s=null;for(;r&&r.getAttribute(t)==i;)s=r,r=o?r.previousSibling:r.nextSibling;return s?n.createPositionAt(s,o?"before":"after"):e}function Hm(e,t,i,o){const n=e.editing.view,r=new Set;n.document.registerPostFixer(n=>{const s=e.model.document.selection;let a=!1;if(s.hasAttribute(t)){const l=Dm(s.getFirstPosition(),t,s.getAttribute(t),e.model),c=e.editing.mapper.toViewRange(l);for(const e of c.getItems())e.is("element",i)&&!e.hasClass(o)&&(n.addClass(o,e),r.add(e),a=!0)}return a}),e.conversion.for("editingDowncast").add(e=>{function t(){n.change(e=>{for(const t of r.values())e.removeClass(o,t),r.delete(t)})}e.on("insert",t,{priority:"highest"}),e.on("remove",t,{priority:"highest"}),e.on("attribute",t,{priority:"highest"}),e.on("selection",t,{priority:"highest"})})}const jm="code";class Wm extends Qe{static get pluginName(){return"CodeEditing"}static get requires(){return[Cm]}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:jm}),e.model.schema.setAttributeProperties(jm,{isFormatting:!0,copyOnEnter:!1}),e.conversion.attributeToElement({model:jm,view:"code",upcastAlso:{styles:{"word-wrap":"break-word"}}}),e.commands.add(jm,new Yu(e,jm)),e.plugins.get(Cm).registerAttribute(jm),Hm(e,jm,"code","ck-code_selected")}}i(12);class qm extends Qe{static get pluginName(){return"CodeUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("code",i=>{const o=e.commands.get("code"),n=new Ad(i);return n.set({label:t("Code"),icon:'',tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("code"),e.editing.view.focus()}),n})}}function*$m(e,t){for(const i of t)i&&e.getAttributeProperties(i[0]).copyOnEnter&&(yield i)}class Um extends Ze{execute(){const e=this.editor.model,t=e.document;e.change(i=>{!function(e,t,i,o){const n=i.isCollapsed,r=i.getFirstRange(),s=r.start.parent,a=r.end.parent;if(o.isLimit(s)||o.isLimit(a))return void(n||s!=a||e.deleteContent(i));if(n){const e=$m(t.model.schema,i.getAttributes());Km(t,r.start),t.setSelectionAttribute(e)}else{const o=!(r.start.isAtStart&&r.end.isAtEnd),n=s==a;e.deleteContent(i,{leaveUnmerged:o}),o&&(n?Km(t,i.focus):t.setSelection(a,0))}}(this.editor.model,i,t.selection,e.schema),this.fire("afterExecute",{writer:i})})}}function Km(e,t){e.split(t),e.setSelection(t.parent.nextSibling,0)}class Gm extends Mr{constructor(e){super(e);const t=this.document;t.on("keydown",(e,i)=>{if(this.isEnabled&&i.keyCode==Vn.enter){const o=new fn(t,"enter",t.selection.getFirstRange());t.fire(o,new ts(t,i.domEvent,{isSoft:i.shiftKey})),o.stop.called&&e.stop()}})}observe(){}}class Jm extends Qe{static get pluginName(){return"Enter"}init(){const e=this.editor,t=e.editing.view,i=t.document;t.addObserver(Gm),e.commands.add("enter",new Um(e)),this.listenTo(i,"enter",(i,o)=>{o.preventDefault(),o.isSoft||(e.execute("enter"),t.scrollToTheSelection())},{priority:"low"})}}class Ym extends Ze{execute(){const e=this.editor.model,t=e.document;e.change(i=>{!function(e,t,i){const o=i.isCollapsed,n=i.getFirstRange(),r=n.start.parent,s=n.end.parent,a=r==s;if(o){const o=$m(e.schema,i.getAttributes());Qm(e,t,n.end),t.removeSelectionAttribute(i.getAttributeKeys()),t.setSelectionAttribute(o)}else{const o=!(n.start.isAtStart&&n.end.isAtEnd);e.deleteContent(i,{leaveUnmerged:o}),a?Qm(e,t,i.focus):o&&t.setSelection(s,0)}}(e,i,t.selection),this.fire("afterExecute",{writer:i})})}refresh(){const e=this.editor.model,t=e.document;this.isEnabled=function(e,t){if(t.rangeCount>1)return!1;const i=t.anchor;if(!i||!e.checkChild(i,"softBreak"))return!1;const o=t.getFirstRange(),n=o.start.parent,r=o.end.parent;if((Xm(n,e)||Xm(r,e))&&n!==r)return!1;return!0}(e.schema,t.selection)}}function Qm(e,t,i){const o=t.createElement("softBreak");e.insertContent(o,i),t.setSelection(o,"after")}function Xm(e,t){return!e.is("rootElement")&&(t.isLimit(e)||Xm(e.parent,t))}class Zm extends Qe{static get pluginName(){return"ShiftEnter"}init(){const e=this.editor,t=e.model.schema,i=e.conversion,o=e.editing.view,n=o.document;t.register("softBreak",{allowWhere:"$text",isInline:!0}),i.for("upcast").elementToElement({model:"softBreak",view:"br"}),i.for("downcast").elementToElement({model:"softBreak",view:(e,{writer:t})=>t.createEmptyElement("br")}),o.addObserver(Gm),e.commands.add("shiftEnter",new Ym(e)),this.listenTo(n,"enter",(t,i)=>{i.preventDefault(),i.isSoft&&(e.execute("shiftEnter"),o.scrollToTheSelection())},{priority:"low"})}}class eg extends Ze{refresh(){this.value=this._getValue(),this.isEnabled=this._checkEnabled()}execute(e={}){const t=this.editor.model,i=t.schema,o=t.document.selection,n=Array.from(o.getSelectedBlocks()),r=void 0===e.forceValue?!this.value:e.forceValue;t.change(e=>{if(r){const t=n.filter(e=>tg(e)||og(i,e));this._applyQuote(e,t)}else this._removeQuote(e,n.filter(tg))})}_getValue(){const e=Os(this.editor.model.document.selection.getSelectedBlocks());return!(!e||!tg(e))}_checkEnabled(){if(this.value)return!0;const e=this.editor.model.document.selection,t=this.editor.model.schema,i=Os(e.getSelectedBlocks());return!!i&&og(t,i)}_removeQuote(e,t){ig(e,t).reverse().forEach(t=>{if(t.start.isAtStart&&t.end.isAtEnd)return void e.unwrap(t.start.parent);if(t.start.isAtStart){const i=e.createPositionBefore(t.start.parent);return void e.move(t,i)}t.end.isAtEnd||e.split(t.end);const i=e.createPositionAfter(t.end.parent);e.move(t,i)})}_applyQuote(e,t){const i=[];ig(e,t).reverse().forEach(t=>{let o=tg(t.start);o||(o=e.createElement("blockQuote"),e.wrap(t,o)),i.push(o)}),i.reverse().reduce((t,i)=>t.nextSibling==i?(e.merge(e.createPositionAfter(t)),t):i)}}function tg(e){return"blockQuote"==e.parent.name?e.parent:null}function ig(e,t){let i,o=0;const n=[];for(;o{const o=e.model.document.differ.getChanges();for(const e of o)if("insert"==e.type){const o=e.position.nodeAfter;if(!o)continue;if(o.is("element","blockQuote")&&o.isEmpty)return i.remove(o),!0;if(o.is("element","blockQuote")&&!t.checkChild(e.position,o))return i.unwrap(o),!0;if(o.is("element")){const e=i.createRangeIn(o);for(const o of e.getItems())if(o.is("element","blockQuote")&&!t.checkChild(i.createPositionBefore(o),o))return i.unwrap(o),!0}}else if("remove"==e.type){const t=e.position.parent;if(t.is("element","blockQuote")&&t.isEmpty)return i.remove(t),!0}return!1});const i=this.editor.editing.view.document,o=e.model.document.selection,n=e.commands.get("blockQuote");this.listenTo(i,"enter",(t,i)=>{if(!o.isCollapsed||!n.value)return;o.getLastPosition().parent.isEmpty&&(e.execute("blockQuote"),e.editing.view.scrollToTheSelection(),i.preventDefault(),t.stop())},{context:"blockquote"}),this.listenTo(i,"delete",(t,i)=>{if("backward"!=i.direction||!o.isCollapsed||!n.value)return;const r=o.getLastPosition().parent;r.isEmpty&&!r.previousSibling&&(e.execute("blockQuote"),e.editing.view.scrollToTheSelection(),i.preventDefault(),t.stop())},{context:"blockquote"})}}i(64);class rg extends Qe{static get pluginName(){return"BlockQuoteUI"}init(){const e=this.editor,t=e.t;e.ui.componentFactory.add("blockQuote",i=>{const o=e.commands.get("blockQuote"),n=new Ad(i);return n.set({label:t("Block quote"),icon:Yc,tooltip:!0,isToggleable:!0}),n.bind("isOn","isEnabled").to(o,"value","isEnabled"),this.listenTo(n,"execute",()=>{e.execute("blockQuote"),e.editing.view.focus()}),n})}}class sg extends Ze{refresh(){const e=this.editor.model,t=Os(e.document.selection.getSelectedBlocks());this.value=!!t&&t.is("element","paragraph"),this.isEnabled=!!t&&ag(t,e.schema)}execute(e={}){const t=this.editor.model,i=t.document;t.change(o=>{const n=(e.selection||i.selection).getSelectedBlocks();for(const e of n)!e.is("element","paragraph")&&ag(e,t.schema)&&o.rename(e,"paragraph")})}}function ag(e,t){return t.checkChild(e.parent,"paragraph")&&!t.isObject(e)}class lg extends Ze{execute(e){const t=this.editor.model;let i=e.position;t.change(e=>{const o=e.createElement("paragraph");if(!t.schema.checkChild(i.parent,o)){const n=t.schema.findAllowedParent(i,o);if(!n)return;i=e.split(i,n).position}t.insertContent(o,i),e.setSelection(o,"in")})}}class cg extends Qe{static get pluginName(){return"Paragraph"}init(){const e=this.editor,t=e.model;e.commands.add("paragraph",new sg(e)),e.commands.add("insertParagraph",new lg(e)),t.schema.register("paragraph",{inheritAllFrom:"$block"}),e.conversion.elementToElement({model:"paragraph",view:"p"}),e.conversion.for("upcast").elementToElement({model:(e,{writer:t})=>cg.paragraphLikeElements.has(e.name)?e.isEmpty?null:t.createElement("paragraph"):null,view:/.+/,converterPriority:"low"})}}cg.paragraphLikeElements=new Set(["blockquote","dd","div","dt","h1","h2","h3","h4","h5","h6","li","p","td","th"]);class dg extends Ze{constructor(e,t){super(e),this.modelElements=t}refresh(){const e=Os(this.editor.model.document.selection.getSelectedBlocks());this.value=!!e&&this.modelElements.includes(e.name)&&e.name,this.isEnabled=!!e&&this.modelElements.some(t=>hg(e,t,this.editor.model.schema))}execute(e){const t=this.editor.model,i=t.document,o=e.value;t.change(e=>{const n=Array.from(i.selection.getSelectedBlocks()).filter(e=>hg(e,o,t.schema));for(const t of n)t.is("element",o)||e.rename(t,o)})}}function hg(e,t,i){return i.checkChild(e.parent,t)&&!i.isObject(e)}class ug extends Qe{static get pluginName(){return"HeadingEditing"}constructor(e){super(e),e.config.define("heading",{options:[{model:"paragraph",title:"Paragraph",class:"ck-heading_paragraph"},{model:"heading1",view:"h2",title:"Heading 1",class:"ck-heading_heading1"},{model:"heading2",view:"h3",title:"Heading 2",class:"ck-heading_heading2"},{model:"heading3",view:"h4",title:"Heading 3",class:"ck-heading_heading3"}]})}static get requires(){return[cg]}init(){const e=this.editor,t=e.config.get("heading.options"),i=[];for(const o of t)"paragraph"!==o.model&&(e.model.schema.register(o.model,{inheritAllFrom:"$block"}),e.conversion.elementToElement(o),i.push(o.model));this._addDefaultH1Conversion(e),e.commands.add("heading",new dg(e,i))}afterInit(){const e=this.editor,t=e.commands.get("enter"),i=e.config.get("heading.options");t&&this.listenTo(t,"afterExecute",(t,o)=>{const n=e.model.document.selection.getFirstPosition().parent;i.some(e=>n.is("element",e.model))&&!n.is("element","paragraph")&&0===n.childCount&&o.writer.rename(n,"paragraph")})}_addDefaultH1Conversion(e){e.conversion.for("upcast").elementToElement({model:"heading1",view:"h1",converterPriority:a.get("low")+1})}}function mg(e){const t=e.t,i={Paragraph:t("Paragraph"),"Heading 1":t("Heading 1"),"Heading 2":t("Heading 2"),"Heading 3":t("Heading 3"),"Heading 4":t("Heading 4"),"Heading 5":t("Heading 5"),"Heading 6":t("Heading 6")};return e.config.get("heading.options").map(e=>{const t=i[e.title];return t&&t!=e.title&&(e.title=t),e})}i(13);class gg extends Qe{static get pluginName(){return"HeadingUI"}init(){const e=this.editor,t=e.t,i=mg(e),o=t("Choose heading"),n=t("Heading");e.ui.componentFactory.add("heading",t=>{const r={},s=new Zi,a=e.commands.get("heading"),l=e.commands.get("paragraph"),c=[a];for(const e of i){const t={type:"button",model:new uh({label:e.title,class:e.class,withText:!0})};"paragraph"===e.model?(t.model.bind("isOn").to(l,"value"),t.model.set("commandName","paragraph"),c.push(l)):(t.model.bind("isOn").to(a,"value",t=>t===e.model),t.model.set({commandName:"heading",commandValue:e.model})),s.add(t),r[e.model]=e.title}const d=Zd(t);return th(d,s),d.buttonView.set({isOn:!1,withText:!0,tooltip:n}),d.extendTemplate({attributes:{class:["ck-heading-dropdown"]}}),d.bind("isEnabled").toMany(c,"isEnabled",(...e)=>e.some(e=>e)),d.buttonView.bind("label").to(a,"value",l,"value",(e,t)=>{const i=e||t&&"paragraph";return r[i]?r[i]:o}),this.listenTo(d,"execute",t=>{e.execute(t.source.commandName,t.source.commandValue?{value:t.source.commandValue}:void 0),e.editing.view.focus()}),d})}}class fg{constructor(){this._stack=[]}add(e,t){const i=this._stack,o=i[0];this._insertDescriptor(e);const n=i[0];o===n||pg(o,n)||this.fire("change:top",{oldDescriptor:o,newDescriptor:n,writer:t})}remove(e,t){const i=this._stack,o=i[0];this._removeDescriptor(e);const n=i[0];o===n||pg(o,n)||this.fire("change:top",{oldDescriptor:o,newDescriptor:n,writer:t})}_insertDescriptor(e){const t=this._stack,i=t.findIndex(t=>t.id===e.id);if(pg(e,t[i]))return;i>-1&&t.splice(i,1);let o=0;for(;t[o]&&bg(t[o],e);)o++;t.splice(o,0,e)}_removeDescriptor(e){const t=this._stack,i=t.findIndex(t=>t.id===e);i>-1&&t.splice(i,1)}}function pg(e,t){return e&&t&&e.priority==t.priority&&wg(e.classes)==wg(t.classes)}function bg(e,t){return e.priority>t.priority||!(e.prioritywg(t.classes)}function wg(e){return Array.isArray(e)?e.sort().join(","):e}Ye(fg,h);function kg(e){return!!e.is("element")&&!!e.getCustomProperty("widget")}function _g(e,t,i={}){if(!e.is("containerElement"))throw new l.a("widget-to-widget-wrong-element-type",null,{element:e});return t.setAttribute("contenteditable","false",e),t.addClass("ck-widget",e),t.setCustomProperty("widget",!0,e),e.getFillerOffset=Rg,i.label&&function(e,t,i){i.setCustomProperty("widgetLabel",t,e)}(e,i.label,t),i.hasSelectionHandle&&function(e,t){const i=t.createUIElement("div",{class:"ck ck-widget__selection-handle"},(function(e){const t=this.toDomElement(e),i=new xd;return i.set("content",''),i.render(),t.appendChild(i.element),t}));t.insert(t.createPositionAt(e,0),i),t.addClass(["ck-widget_with-selection-handle"],e)}(e,t),xg(e,t,vg,yg),e}function vg(e,t,i){if(t.classes&&i.addClass(to(t.classes),e),t.attributes)for(const o in t.attributes)i.setAttribute(o,t.attributes[o],e)}function yg(e,t,i){if(t.classes&&i.removeClass(to(t.classes),e),t.attributes)for(const o in t.attributes)i.removeAttribute(o,e)}function xg(e,t,i,o){const n=new fg;n.on("change:top",(t,n)=>{n.oldDescriptor&&o(e,n.oldDescriptor,n.writer),n.newDescriptor&&i(e,n.newDescriptor,n.writer)}),t.setCustomProperty("addHighlight",(e,t,i)=>n.add(t,i),e),t.setCustomProperty("removeHighlight",(e,t,i)=>n.remove(t,i),e)}function Cg(e){const t=e.getCustomProperty("widgetLabel");return t?"function"==typeof t?t():t:""}function Ag(e,t){return t.addClass(["ck-editor__editable","ck-editor__nested-editable"],e),t.setAttribute("contenteditable",e.isReadOnly?"false":"true",e),e.on("change:isReadOnly",(i,o,n)=>{t.setAttribute("contenteditable",n?"false":"true",e)}),e.on("change:isFocused",(i,o,n)=>{n?t.addClass("ck-editor__nested-editable_focused",e):t.removeClass("ck-editor__nested-editable_focused",e)}),e}function Tg(e,t){const i=e.getSelectedElement();if(i){const o=Vg(e);if(o)return t.createPositionAt(i,o);if(t.schema.isBlock(i))return t.createPositionAfter(i)}const o=e.getSelectedBlocks().next().value;if(o){if(o.isEmpty)return t.createPositionAt(o,0);const i=t.createPositionAfter(o);return e.focus.isTouching(i)?i:t.createPositionBefore(o)}return e.focus}function Eg(e,t){const i=e.getSelectedElement();return!!i&&t.isObject(i)}function Pg(e,t){return(i,o)=>{const{mapper:n,viewPosition:r}=o,s=n.findMappedViewAncestor(r);if(!t(s))return;const a=n.toModelElement(s);o.modelPosition=e.createPositionAt(a,r.isAtStart?"before":"after")}}function Sg(e,t){const i=new Es(vr.window),o=i.getIntersection(e),n=t.height+fh.arrowVerticalOffset;if(e.top-n>i.top||e.bottom+n',"image/svg+xml").firstChild;class Mg extends Qe{static get pluginName(){return"WidgetTypeAround"}static get requires(){return[Jm,vm]}constructor(e){super(e),this._currentFakeCaretModelElement=null}init(){const e=this.editor,t=e.editing.view;this.on("change:isEnabled",(i,o,n)=>{t.change(e=>{for(const i of t.document.roots)n?e.removeClass("ck-widget__type-around_disabled",i):e.addClass("ck-widget__type-around_disabled",i)}),n||e.model.change(e=>{e.removeSelectionAttribute("widget-type-around")})}),this._enableTypeAroundUIInjection(),this._enableInsertingParagraphsOnButtonClick(),this._enableInsertingParagraphsOnEnterKeypress(),this._enableInsertingParagraphsOnTypingKeystroke(),this._enableTypeAroundFakeCaretActivationUsingKeyboardArrows(),this._enableDeleteIntegration(),this._enableInsertContentIntegration()}destroy(){this._currentFakeCaretModelElement=null}_insertParagraph(e,t){const i=this.editor,o=i.editing.view;i.execute("insertParagraph",{position:i.model.createPositionAt(e,t)}),o.focus(),o.scrollToTheSelection()}_listenToIfEnabled(e,t,i,o){this.listenTo(e,t,(...e)=>{this.isEnabled&&i(...e)},o)}_insertParagraphAccordingToFakeCaretPosition(){const e=this.editor.model.document.selection,t=Vg(e);if(!t)return!1;const i=e.getSelectedElement();return this._insertParagraph(i,t),!0}_enableTypeAroundUIInjection(){const e=this.editor,t=e.model.schema,i=e.locale.t,o={before:i("Insert paragraph before block"),after:i("Insert paragraph after block")};e.editing.downcastDispatcher.on("insert",(e,i,n)=>{const r=n.mapper.toViewElement(i.item);Ig(r,i.item,t)&&function(e,t,i){const o=e.createUIElement("div",{class:"ck ck-reset_all ck-widget__type-around"},(function(e){const i=this.toDomElement(e);return function(e,t){for(const i of zg){const o=new od({tag:"div",attributes:{class:["ck","ck-widget__type-around__button","ck-widget__type-around__button_"+i],title:t[i]},children:[e.ownerDocument.importNode(Og,!0)]});e.appendChild(o.render())}}(i,t),function(e){const t=new od({tag:"div",attributes:{class:["ck","ck-widget__type-around__fake-caret"]}});e.appendChild(t.render())}(i),i}));e.insert(e.createPositionAt(i,"end"),o)}(n.writer,o,r)},{priority:"low"})}_enableTypeAroundFakeCaretActivationUsingKeyboardArrows(){const e=this.editor,t=e.model,i=t.document.selection,o=t.schema,n=e.editing.view;function r(e){return"ck-widget_type-around_show-fake-caret_"+e}this._listenToIfEnabled(n.document,"arrowKey",(e,t)=>{this._handleArrowKeyPress(e,t)},{context:[kg,"$text"],priority:"high"}),this._listenToIfEnabled(i,"change:range",(t,i)=>{i.directChange&&e.model.change(e=>{e.removeSelectionAttribute("widget-type-around")})}),this._listenToIfEnabled(t.document,"change:data",()=>{const t=i.getSelectedElement();if(t){if(Ig(e.editing.mapper.toViewElement(t),t,o))return}e.model.change(e=>{e.removeSelectionAttribute("widget-type-around")})}),this._listenToIfEnabled(e.editing.downcastDispatcher,"selection",(e,t,i)=>{const n=i.writer;if(this._currentFakeCaretModelElement){const e=i.mapper.toViewElement(this._currentFakeCaretModelElement);e&&(n.removeClass(zg.map(r),e),this._currentFakeCaretModelElement=null)}const s=t.selection.getSelectedElement();if(!s)return;const a=i.mapper.toViewElement(s);if(!Ig(a,s,o))return;const l=Vg(t.selection);l&&(n.addClass(r(l),a),this._currentFakeCaretModelElement=s)}),this._listenToIfEnabled(e.ui.focusTracker,"change:isFocused",(t,i,o)=>{o||e.model.change(e=>{e.removeSelectionAttribute("widget-type-around")})})}_handleArrowKeyPress(e,t){const i=this.editor,o=i.model,n=o.document.selection,r=o.schema,s=i.editing.view,a=Fn(t.keyCode,i.locale.contentLanguageDirection),l=s.document.selection.getSelectedElement();let c;Ig(l,i.editing.mapper.toModelElement(l),r)?c=this._handleArrowKeyPressOnSelectedWidget(a):n.isCollapsed&&(c=this._handleArrowKeyPressWhenSelectionNextToAWidget(a)),c&&(t.preventDefault(),e.stop())}_handleArrowKeyPressOnSelectedWidget(e){const t=this.editor.model,i=Vg(t.document.selection);return t.change(t=>{if(!i)return t.setSelectionAttribute("widget-type-around",e?"after":"before"),!0;if(!(i===(e?"after":"before")))return t.removeSelectionAttribute("widget-type-around"),!0;return!1})}_handleArrowKeyPressWhenSelectionNextToAWidget(e){const t=this.editor,i=t.model,o=i.schema,n=t.plugins.get("Widget"),r=n._getObjectElementNextToSelection(e);return!!Ig(t.editing.mapper.toViewElement(r),r,o)&&(i.change(t=>{n._setSelectionOverElement(r),t.setSelectionAttribute("widget-type-around",e?"before":"after")}),!0)}_enableInsertingParagraphsOnButtonClick(){const e=this.editor,t=e.editing.view;this._listenToIfEnabled(t.document,"mousedown",(i,o)=>{const n=o.domTarget.closest(".ck-widget__type-around__button");if(!n)return;const r=function(e){return e.classList.contains("ck-widget__type-around__button_before")?"before":"after"}(n),s=function(e,t){const i=e.closest(".ck-widget");return t.mapDomToView(i)}(n,t.domConverter),a=e.editing.mapper.toModelElement(s);this._insertParagraph(a,r),o.preventDefault(),i.stop()})}_enableInsertingParagraphsOnEnterKeypress(){const e=this.editor,t=e.model.document.selection,i=e.editing.view;this._listenToIfEnabled(i.document,"enter",(i,o)=>{if("atTarget"!=i.eventPhase)return;const n=t.getSelectedElement(),r=e.editing.mapper.toViewElement(n),s=e.model.schema;let a;this._insertParagraphAccordingToFakeCaretPosition()?a=!0:Ig(r,n,s)&&(this._insertParagraph(n,o.isSoft?"before":"after"),a=!0),a&&(o.preventDefault(),i.stop())},{context:kg})}_enableInsertingParagraphsOnTypingKeystroke(){const e=this.editor.editing.view,t=[Vn.enter,Vn.delete,Vn.backspace];this._listenToIfEnabled(e.document,"keydown",(e,i)=>{t.includes(i.keyCode)||um(i)||this._insertParagraphAccordingToFakeCaretPosition()},{priority:"high"})}_enableDeleteIntegration(){const e=this.editor,t=e.editing.view,i=e.model,o=i.schema;this._listenToIfEnabled(t.document,"delete",(t,n)=>{if("atTarget"!=t.eventPhase)return;const r=Vg(i.document.selection);if(!r)return;const s=n.direction,a=i.document.selection.getSelectedElement(),l="forward"==s;if("before"===r===l)e.execute("delete",{selection:i.createSelection(a,"on")});else{const t=o.getNearestSelectionRange(i.createPositionAt(a,r),s);if(t)if(t.isCollapsed){const n=i.createSelection(t.start);if(i.modifySelection(n,{direction:s}),n.focus.isEqual(t.start)){const e=function(e,t){let i=t;for(const o of t.getAncestors({parentFirst:!0})){if(o.childCount>1||e.isLimit(o))break;i=o}return i}(o,t.start.parent);i.deleteContent(i.createSelection(e,"on"),{doNotAutoparagraph:!0})}else i.change(i=>{i.setSelection(t),e.execute(l?"deleteForward":"delete")})}else i.change(i=>{i.setSelection(t),e.execute(l?"deleteForward":"delete")})}n.preventDefault(),t.stop()},{context:kg})}_enableInsertContentIntegration(){const e=this.editor,t=this.editor.model,i=t.document.selection;this._listenToIfEnabled(e.model,"insertContent",(e,[o,n])=>{if(n&&!n.is("documentSelection"))return;const r=Vg(i);return r?(e.stop(),t.change(e=>{const n=i.getSelectedElement(),s=t.createPositionAt(n,r),a=e.createSelection(s),l=t.insertContent(o,a);return e.setSelection(a),l})):void 0},{priority:"high"})}}i(69);function Ng(e){const t=e.model;return(i,o)=>{const n=o.keyCode==Vn.arrowup,r=o.keyCode==Vn.arrowdown,s=o.shiftKey,a=t.document.selection;if(!n&&!r)return;const l=r;if(s&&function(e,t){return!e.isCollapsed&&e.isBackward==t}(a,l))return;const c=function(e,t,i){const o=e.model;if(i){const e=t.isCollapsed?t.focus:t.getLastPosition(),i=Bg(o,e,"forward");if(!i)return null;const n=o.createRange(e,i),r=Fg(o.schema,n,"backward");return r&&e.isBefore(r)?o.createRange(e,r):null}{const e=t.isCollapsed?t.focus:t.getFirstPosition(),i=Bg(o,e,"backward");if(!i)return null;const n=o.createRange(i,e),r=Fg(o.schema,n,"forward");return r&&e.isAfter(r)?o.createRange(r,e):null}}(e,a,l);c&&!c.isCollapsed&&function(e,t,i){const o=e.model,n=e.view.domConverter;if(i){const e=o.createSelection(t.start);o.modifySelection(e),e.focus.isAtEnd||t.start.isEqual(e.focus)||(t=o.createRange(e.focus,t.end))}const r=e.mapper.toViewRange(t),s=n.viewRangeToDom(r),a=Es.getDomRangeRects(s);let l;for(const e of a)if(void 0!==l){if(Math.round(e.top)>=l)return!1;l=Math.max(l,Math.round(e.bottom))}else l=Math.round(e.bottom);return!0}(e,c,l)&&(t.change(e=>{const i=l?c.end:c.start;if(s){const o=t.createSelection(a.anchor);o.setFocus(i),e.setSelection(o)}else e.setSelection(i)}),i.stop(),o.preventDefault(),o.stopPropagation())}}function Bg(e,t,i){const o=e.schema,n=e.createRangeIn(t.root),r="forward"==i?"elementStart":"elementEnd";for(const{previousPosition:e,item:s,type:a}of n.getWalker({startPosition:t,direction:i})){if(o.isLimit(s)&&!o.isInline(s))return e;if(a==r&&o.isBlock(s))return null}return null}function Fg(e,t,i){const o="backward"==i?t.end:t.start;if(e.checkChild(o,"$text"))return o;for(const{nextPosition:o}of t.getWalker({direction:i}))if(e.checkChild(o,"$text"))return o}class Dg extends Qe{static get pluginName(){return"Widget"}static get requires(){return[Mg,vm]}init(){const e=this.editor.editing.view,t=e.document;this._previouslySelected=new Set,this.editor.editing.downcastDispatcher.on("selection",(e,t,i)=>{this._clearPreviouslySelectedWidgets(i.writer);const o=i.writer,n=o.document.selection,r=n.getSelectedElement();let s=null;for(const e of n.getRanges())for(const t of e){const e=t.item;kg(e)&&!Lg(e,s)&&(o.addClass("ck-widget_selected",e),this._previouslySelected.add(e),s=e,e==r&&o.setSelection(n.getRanges(),{fake:!0,label:Cg(r)}))}},{priority:"low"}),e.addObserver(Kh),this.listenTo(t,"mousedown",(...e)=>this._onMousedown(...e)),this.listenTo(t,"arrowKey",(...e)=>{this._handleSelectionChangeOnArrowKeyPress(...e)},{context:[kg,"$text"]}),this.listenTo(t,"arrowKey",(...e)=>{this._preventDefaultOnArrowKeyPress(...e)},{context:"$root"}),this.listenTo(t,"arrowKey",Ng(this.editor.editing),{context:"$text"}),this.listenTo(t,"delete",(e,t)=>{this._handleDelete("forward"==t.direction)&&(t.preventDefault(),e.stop())},{context:"$root"})}_onMousedown(e,t){const i=this.editor,o=i.editing.view,n=o.document;let r=t.target;if(function(e){for(;e;){if(e.is("editableElement")&&!e.is("rootElement"))return!0;if(kg(e))return!1;e=e.parent}return!1}(r)){if((Sn.isSafari||Sn.isGecko)&&t.domEvent.detail>=3){const e=i.editing.mapper,o=r.is("attributeElement")?r.findAncestor(e=>!e.is("attributeElement")):r,n=e.toModelElement(o);t.preventDefault(),this.editor.model.change(e=>{e.setSelection(n,"in")})}return}if(!kg(r)&&(r=r.findAncestor(kg),!r))return;Sn.isAndroid&&t.preventDefault(),n.isFocused||o.focus();const s=i.editing.mapper.toModelElement(r);this._setSelectionOverElement(s)}_handleSelectionChangeOnArrowKeyPress(e,t){const i=t.keyCode,o=this.editor.model,n=o.schema,r=o.document.selection,s=r.getSelectedElement(),a=Fn(i,this.editor.locale.contentLanguageDirection);if(s&&n.isObject(s)){const i=a?r.getLastPosition():r.getFirstPosition(),s=n.getNearestSelectionRange(i,a?"forward":"backward");return void(s&&(o.change(e=>{e.setSelection(s)}),t.preventDefault(),e.stop()))}if(!r.isCollapsed)return;const l=this._getObjectElementNextToSelection(a);l&&n.isObject(l)&&(this._setSelectionOverElement(l),t.preventDefault(),e.stop())}_preventDefaultOnArrowKeyPress(e,t){const i=this.editor.model,o=i.schema,n=i.document.selection.getSelectedElement();n&&o.isObject(n)&&(t.preventDefault(),e.stop())}_handleDelete(e){if(this.editor.isReadOnly)return;const t=this.editor.model.document.selection;if(!t.isCollapsed)return;const i=this._getObjectElementNextToSelection(e);return i?(this.editor.model.change(e=>{let o=t.anchor.parent;for(;o.isEmpty;){const t=o;o=t.parent,e.remove(t)}this._setSelectionOverElement(i)}),!0):void 0}_setSelectionOverElement(e){this.editor.model.change(t=>{t.setSelection(t.createRangeOn(e))})}_getObjectElementNextToSelection(e){const t=this.editor.model,i=t.schema,o=t.document.selection,n=t.createSelection(o);t.modifySelection(n,{direction:e?"forward":"backward"});const r=e?n.focus.nodeBefore:n.focus.nodeAfter;return r&&i.isObject(r)?r:null}_clearPreviouslySelectedWidgets(e){for(const t of this._previouslySelected)e.removeClass("ck-widget_selected",t);this._previouslySelected.clear()}}function Lg(e,t){return!!t&&Array.from(e.getAncestors()).includes(t)}class Hg extends Qe{static get requires(){return[_h]}static get pluginName(){return"WidgetToolbarRepository"}init(){const e=this.editor;if(e.plugins.has("BalloonToolbar")){const t=e.plugins.get("BalloonToolbar");this.listenTo(t,"show",t=>{(function(e){const t=e.getSelectedElement();return!(!t||!kg(t))})(e.editing.view.document.selection)&&t.stop()},{priority:"high"})}this._toolbarDefinitions=new Map,this._balloon=this.editor.plugins.get("ContextualBalloon"),this.on("change:isEnabled",()=>{this._updateToolbarsVisibility()}),this.listenTo(e.ui,"update",()=>{this._updateToolbarsVisibility()}),this.listenTo(e.ui.focusTracker,"change:isFocused",()=>{this._updateToolbarsVisibility()},{priority:"low"})}destroy(){super.destroy();for(const e of this._toolbarDefinitions.values())e.view.destroy()}register(e,{ariaLabel:t,items:i,getRelatedElement:o,balloonClassName:n="ck-toolbar-container"}){if(!i.length)return void Object(l.b)("widget-toolbar-no-items",{toolbarId:e});const r=this.editor,s=r.t,a=new Ud(r.locale);if(a.ariaLabel=t||s("Widget toolbar"),this._toolbarDefinitions.has(e))throw new l.a("widget-toolbar-duplicated",this,{toolbarId:e});a.fillFromConfig(i,r.ui.componentFactory),this._toolbarDefinitions.set(e,{view:a,getRelatedElement:o,balloonClassName:n})}_updateToolbarsVisibility(){let e=0,t=null,i=null;for(const o of this._toolbarDefinitions.values()){const n=o.getRelatedElement(this.editor.editing.view.document.selection);if(this.isEnabled&&n)if(this.editor.ui.focusTracker.isFocused){const r=n.getAncestors().length;r>e&&(e=r,t=n,i=o)}else this._isToolbarVisible(o)&&this._hideToolbar(o);else this._isToolbarInBalloon(o)&&this._hideToolbar(o)}i&&this._showToolbar(i,t)}_hideToolbar(e){this._balloon.remove(e.view),this.stopListening(this._balloon,"change:visibleView")}_showToolbar(e,t){this._isToolbarVisible(e)?jg(this.editor,t):this._isToolbarInBalloon(e)||(this._balloon.add({view:e.view,position:Wg(this.editor,t),balloonClassName:e.balloonClassName}),this.listenTo(this._balloon,"change:visibleView",()=>{for(const e of this._toolbarDefinitions.values())if(this._isToolbarVisible(e)){const t=e.getRelatedElement(this.editor.editing.view.document.selection);jg(this.editor,t)}}))}_isToolbarVisible(e){return this._balloon.visibleView===e.view}_isToolbarInBalloon(e){return this._balloon.hasView(e.view)}}function jg(e,t){const i=e.plugins.get("ContextualBalloon"),o=Wg(e,t);i.updatePosition(o)}function Wg(e,t){const i=e.editing.view,o=fh.defaultPositions;return{target:i.domConverter.mapViewToDom(t),positions:[o.northArrowSouth,o.northArrowSouthWest,o.northArrowSouthEast,o.southArrowNorth,o.southArrowNorthWest,o.southArrowNorthEast,Sg]}}class qg{constructor(e){this.set("activeHandlePosition",null),this.set("proposedWidthPercents",null),this.set("proposedWidth",null),this.set("proposedHeight",null),this.set("proposedHandleHostWidth",null),this.set("proposedHandleHostHeight",null),this._options=e,this._referenceCoordinates=null}begin(e,t,i){const o=new Es(t);this.activeHandlePosition=function(e){const t=["top-left","top-right","bottom-right","bottom-left"];for(const i of t)if(e.classList.contains("ck-widget__resizer__handle-"+i))return i}(e),this._referenceCoordinates=function(e,t){const i=new Es(e),o=t.split("-"),n={x:"right"==o[1]?i.right:i.left,y:"bottom"==o[0]?i.bottom:i.top};return n.x+=e.ownerDocument.defaultView.scrollX,n.y+=e.ownerDocument.defaultView.scrollY,n}(t,function(e){const t=e.split("-"),i={top:"bottom",bottom:"top",left:"right",right:"left"};return`${i[t[0]]}-${i[t[1]]}`}(this.activeHandlePosition)),this.originalWidth=o.width,this.originalHeight=o.height,this.aspectRatio=o.width/o.height;const n=i.style.width;n&&n.match(/^\d+(\.\d*)?%$/)?this.originalWidthPercents=parseFloat(n):this.originalWidthPercents=function(e,t){const i=e.parentElement,o=parseFloat(i.ownerDocument.defaultView.getComputedStyle(i).width);return t.width/o*100}(i,o)}update(e){this.proposedWidth=e.width,this.proposedHeight=e.height,this.proposedWidthPercents=e.widthPercents,this.proposedHandleHostWidth=e.handleHostWidth,this.proposedHandleHostHeight=e.handleHostHeight}}Ye(qg,qe);class $g{constructor(e){this._options=e,this._domResizerWrapper=null,this._viewResizerWrapper=null,this.set("isEnabled",!0),this.decorate("begin"),this.decorate("cancel"),this.decorate("commit"),this.decorate("updateSize"),this.on("commit",e=>{this.state.proposedWidth||this.state.proposedWidthPercents||(this._cleanup(),e.stop())},{priority:"high"}),this.on("change:isEnabled",()=>{this.isEnabled&&this.redraw()})}attach(){const e=this,t=this._options.viewElement;this._options.editor.editing.view.change(i=>{const o=i.createUIElement("div",{class:"ck ck-reset_all ck-widget__resizer"},(function(t){const i=this.toDomElement(t);return e._appendHandles(i),e._appendSizeUI(i),e._domResizerWrapper=i,e.on("change:isEnabled",(e,t,o)=>{i.style.display=o?"":"none"}),i.style.display=e.isEnabled?"":"none",i}));i.insert(i.createPositionAt(t,"end"),o),i.addClass("ck-widget_with-resizer",t),this._viewResizerWrapper=o})}begin(e){this.state=new qg(this._options),this._sizeUI.bindToState(this._options,this.state),this._initialViewWidth=this._options.viewElement.getStyle("width"),this.state.begin(e,this._getHandleHost(),this._getResizeHost())}updateSize(e){const t=this._proposeNewSize(e);this._options.editor.editing.view.change(e=>{const i=this._options.unit||"%",o=("%"===i?t.widthPercents:t.width)+i;e.setStyle("width",o,this._options.viewElement)});const i=this._getHandleHost(),o=new Es(i);t.handleHostWidth=Math.round(o.width),t.handleHostHeight=Math.round(o.height);const n=new Es(i);t.width=Math.round(n.width),t.height=Math.round(n.height),this.redraw(o),this.state.update(t)}commit(){const e=this._options.unit||"%",t=("%"===e?this.state.proposedWidthPercents:this.state.proposedWidth)+e;this._options.editor.editing.view.change(()=>{this._cleanup(),this._options.onCommit(t)})}cancel(){this._cleanup()}destroy(){this.cancel()}redraw(e){const t=this._domResizerWrapper;if(!((i=t)&&i.ownerDocument&&i.ownerDocument.contains(i)))return;var i;const o=t.parentElement,n=this._getHandleHost(),r=this._viewResizerWrapper,s=[r.getStyle("width"),r.getStyle("height"),r.getStyle("left"),r.getStyle("top")];let a;if(o.isSameNode(n)){const t=e||new Es(n);a=[t.width+"px",t.height+"px",void 0,void 0]}else a=[n.offsetWidth+"px",n.offsetHeight+"px",n.offsetLeft+"px",n.offsetTop+"px"];"same"!==lo(s,a)&&this._options.editor.editing.view.change(e=>{e.setStyle({width:a[0],height:a[1],left:a[2],top:a[3]},r)})}containsHandle(e){return this._domResizerWrapper.contains(e)}static isResizeHandle(e){return e.classList.contains("ck-widget__resizer__handle")}_cleanup(){this._sizeUI.dismiss(),this._sizeUI.isVisible=!1;this._options.editor.editing.view.change(e=>{e.setStyle("width",this._initialViewWidth,this._options.viewElement)})}_proposeNewSize(e){const t=this.state,i={x:(o=e).pageX,y:o.pageY};var o;const n=!this._options.isCentered||this._options.isCentered(this),r={x:t._referenceCoordinates.x-(i.x+t.originalWidth),y:i.y-t.originalHeight-t._referenceCoordinates.y};n&&t.activeHandlePosition.endsWith("-right")&&(r.x=i.x-(t._referenceCoordinates.x+t.originalWidth)),n&&(r.x*=2);const s={width:Math.abs(t.originalWidth+r.x),height:Math.abs(t.originalHeight+r.y)};s.dominant=s.width/t.aspectRatio>s.height?"width":"height",s.max=s[s.dominant];const a={width:s.width,height:s.height};return"width"==s.dominant?a.height=a.width/t.aspectRatio:a.width=a.height*t.aspectRatio,{width:Math.round(a.width),height:Math.round(a.height),widthPercents:Math.min(Math.round(t.originalWidthPercents/t.originalWidth*a.width*100)/100,100)}}_getResizeHost(){const e=this._domResizerWrapper.parentElement;return this._options.getResizeHost(e)}_getHandleHost(){const e=this._domResizerWrapper.parentElement;return this._options.getHandleHost(e)}_appendHandles(e){const t=["top-left","top-right","bottom-right","bottom-left"];for(const o of t)e.appendChild(new od({tag:"div",attributes:{class:"ck-widget__resizer__handle "+(i=o,"ck-widget__resizer__handle-"+i)}}).render());var i}_appendSizeUI(e){const t=new Ug;t.render(),this._sizeUI=t,e.appendChild(t.element)}}Ye($g,qe);class Ug extends id{constructor(){super();const e=this.bindTemplate;this.setTemplate({tag:"div",attributes:{class:["ck","ck-size-view",e.to("activeHandlePosition",e=>e?"ck-orientation-"+e:"")],style:{display:e.if("isVisible","none",e=>!e)}},children:[{text:e.to("label")}]})}bindToState(e,t){this.bind("isVisible").to(t,"proposedWidth",t,"proposedHeight",(e,t)=>null!==e&&null!==t),this.bind("label").to(t,"proposedHandleHostWidth",t,"proposedHandleHostHeight",t,"proposedWidthPercents",(t,i,o)=>"px"===e.unit?`${t}×${i}`:o+"%"),this.bind("activeHandlePosition").to(t)}dismiss(){this.unbind(),this.isVisible=!1}}var Kg=function(e,t,i){var o=!0,n=!0;if("function"!=typeof e)throw new TypeError("Expected a function");return w(i)&&(o="leading"in i?!!i.leading:o,n="trailing"in i?!!i.trailing:n),ps(e,t,{leading:o,maxWait:t,trailing:n})};i(71);class Gg extends Qe{static get pluginName(){return"WidgetResize"}init(){this.set("visibleResizer",null),this.set("_activeResizer",null),this._resizers=new Map;const e=vr.window.document;this.editor.model.schema.setAttributeProperties("width",{isFormatting:!0}),this.editor.editing.view.addObserver(Kh),this._observer=Object.create(Vr),this.listenTo(this.editor.editing.view.document,"mousedown",this._mouseDownListener.bind(this),{priority:"high"}),this._observer.listenTo(e,"mousemove",this._mouseMoveListener.bind(this)),this._observer.listenTo(e,"mouseup",this._mouseUpListener.bind(this));const t=()=>{this.visibleResizer&&this.visibleResizer.redraw()},i=Kg(t,200);this.on("change:visibleResizer",t),this.editor.ui.on("update",i),this._observer.listenTo(vr.window,"resize",i);const o=this.editor.editing.view.document.selection;o.on("change",()=>{const e=o.getSelectedElement();this.visibleResizer=this.getResizerByViewElement(e)||null})}destroy(){this._observer.stopListening();for(const e of this._resizers.values())e.destroy()}attachTo(e){const t=new $g(e),i=this.editor.plugins;if(t.attach(),i.has("WidgetToolbarRepository")){const e=i.get("WidgetToolbarRepository");t.on("begin",()=>{e.forceDisabled("resize")},{priority:"lowest"}),t.on("cancel",()=>{e.clearForceDisabled("resize")},{priority:"highest"}),t.on("commit",()=>{e.clearForceDisabled("resize")},{priority:"highest"})}this._resizers.set(e.viewElement,t);const o=this.editor.editing.view.document.selection.getSelectedElement();return this.getResizerByViewElement(o)==t&&(this.visibleResizer=t),t}getResizerByViewElement(e){return this._resizers.get(e)}_getResizerByHandle(e){for(const t of this._resizers.values())if(t.containsHandle(e))return t}_mouseDownListener(e,t){const i=t.domTarget;$g.isResizeHandle(i)&&(this._activeResizer=this._getResizerByHandle(i),this._activeResizer&&(this._activeResizer.begin(i),e.stop(),t.preventDefault()))}_mouseMoveListener(e,t){this._activeResizer&&this._activeResizer.updateSize(t)}_mouseUpListener(){this._activeResizer&&(this._activeResizer.commit(),this._activeResizer=null)}}Ye(Gg,qe);class Jg extends Mr{observe(e){this.listenTo(e,"load",(e,t)=>{const i=t.target;this.checkShouldIgnoreEventFromTarget(i)||"IMG"==i.tagName&&this._fireEvents(t)},{useCapture:!0})}_fireEvents(e){this.isEnabled&&(this.document.fire("layoutChanged"),this.document.fire("imageLoaded",e))}}function Yg(e){return!!e.getCustomProperty("image")&&kg(e)}function Qg(e){const t=e.getSelectedElement();return t&&Yg(t)?t:null}function Xg(e){return!!e&&e.is("element","image")}function Zg(e,t={},i=null){e.change(o=>{const n=o.createElement("image",t),r=i||Tg(e.document.selection,e);e.insertContent(n,r),n.parent&&o.setSelection(n,"on")})}function ef(e){const t=e.schema,i=e.document.selection;return function(e,t,i){const o=function(e,t){const i=Tg(e,t).parent;if(i.isEmpty&&!i.is("element","$root"))return i.parent;return i}(e,i);return t.checkChild(o,"image")}(i,t,e)&&!Eg(i,t)&&function(e){return[...e.focus.getAncestors()].every(e=>!e.is("element","image"))}(i)}function tf(e){const t=[];for(const i of e.getChildren())t.push(i),i.is("element")&&t.push(...i.getChildren());return t.find(e=>e.is("element","img"))}function of(e){return i=>{i.on(`attribute:${e}:image`,t)};function t(e,t,i){if(!i.consumable.consume(t.item,e.name))return;const o=i.writer,n=tf(i.mapper.toViewElement(t.item));o.setAttribute(t.attributeKey,t.attributeNewValue||"",n)}}class nf extends Ze{refresh(){this.isEnabled=ef(this.editor.model)}execute(e){const t=this.editor.model;for(const i of to(e.source))Zg(t,{src:i})}}class rf extends Qe{static get pluginName(){return"ImageEditing"}init(){const e=this.editor,t=e.model.schema,i=e.t,o=e.conversion;e.editing.view.addObserver(Jg),t.register("image",{isObject:!0,isBlock:!0,allowWhere:"$block",allowAttributes:["alt","src","srcset"]}),o.for("dataDowncast").elementToElement({model:"image",view:(e,{writer:t})=>sf(t)}),o.for("editingDowncast").elementToElement({model:"image",view:(e,{writer:t})=>function(e,t,i){return t.setCustomProperty("image",!0,e),_g(e,t,{label:function(){const t=tf(e).getAttribute("alt");return t?`${t} ${i}`:i}})}(sf(t),t,i("image widget"))}),o.for("downcast").add(of("src")).add(of("alt")).add(function(){return t=>{t.on("attribute:srcset:image",e)};function e(e,t,i){if(!i.consumable.consume(t.item,e.name))return;const o=i.writer,n=tf(i.mapper.toViewElement(t.item));if(null===t.attributeNewValue){const e=t.attributeOldValue;e.data&&(o.removeAttribute("srcset",n),o.removeAttribute("sizes",n),e.width&&o.removeAttribute("width",n))}else{const e=t.attributeNewValue;e.data&&(o.setAttribute("srcset",e.data,n),o.setAttribute("sizes","100vw",n),e.width&&o.setAttribute("width",e.width,n))}}}()),o.for("upcast").elementToElement({view:{name:"img",attributes:{src:!0}},model:(e,{writer:t})=>t.createElement("image",{src:e.getAttribute("src")})}).attributeToAttribute({view:{name:"img",key:"alt"},model:"alt"}).attributeToAttribute({view:{name:"img",key:"srcset"},model:{key:"srcset",value:e=>{const t={data:e.getAttribute("srcset")};return e.hasAttribute("width")&&(t.width=e.getAttribute("width")),t}}}).add(function(){return t=>{t.on("element:figure",e)};function e(e,t,i){if(!i.consumable.test(t.viewItem,{name:!0,classes:"image"}))return;const o=tf(t.viewItem);if(!o||!o.hasAttribute("src")||!i.consumable.test(o,{name:!0}))return;const n=Os(i.convertItem(o,t.modelCursor).modelRange.getItems());n&&(i.convertChildren(t.viewItem,n),i.updateConversionResult(n,t))}}());const n=new nf(e);e.commands.add("insertImage",n),e.commands.add("imageInsert",n)}}function sf(e){const t=e.createEmptyElement("img"),i=e.createContainerElement("figure",{class:"image"});return e.insert(e.createPositionAt(i,0),t),i}class af extends Ze{refresh(){const e=this.editor.model.document.selection.getSelectedElement();this.isEnabled=Xg(e),Xg(e)&&e.hasAttribute("alt")?this.value=e.getAttribute("alt"):this.value=!1}execute(e){const t=this.editor.model,i=t.document.selection.getSelectedElement();t.change(t=>{t.setAttribute("alt",e.newValue,i)})}}class lf extends Qe{static get pluginName(){return"ImageTextAlternativeEditing"}init(){this.editor.commands.add("imageTextAlternative",new af(this.editor))}}i(73),i(10);class cf extends id{constructor(e){super(e);const t=this.locale.t;this.focusTracker=new Ms,this.keystrokes=new Ns,this.labeledInput=this._createLabeledInputView(),this.saveButtonView=this._createButton(t("Save"),Sc,"ck-button-save"),this.saveButtonView.type="submit",this.cancelButtonView=this._createButton(t("Cancel"),Pc,"ck-button-cancel","cancel"),this._focusables=new td,this._focusCycler=new Id({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}}),this.setTemplate({tag:"form",attributes:{class:["ck","ck-text-alternative-form","ck-responsive-form"],tabindex:"-1"},children:[this.labeledInput,this.saveButtonView,this.cancelButtonView]}),Zc(this)}render(){super.render(),this.keystrokes.listenTo(this.element),ed({view:this}),[this.labeledInput,this.saveButtonView,this.cancelButtonView].forEach(e=>{this._focusables.add(e),this.focusTracker.add(e.element)})}_createButton(e,t,i,o){const n=new Ad(this.locale);return n.set({label:e,icon:t,tooltip:!0}),n.extendTemplate({attributes:{class:i}}),o&&n.delegate("execute").to(this,o),n}_createLabeledInputView(){const e=this.locale.t,t=new lh(this.locale,ch);return t.label=e("Text alternative"),t}}function df(e){const t=e.editing.view,i=fh.defaultPositions;return{target:t.domConverter.viewToDom(t.document.selection.getSelectedElement()),positions:[i.northArrowSouth,i.northArrowSouthWest,i.northArrowSouthEast,i.southArrowNorth,i.southArrowNorthWest,i.southArrowNorthEast]}}class hf extends Qe{static get requires(){return[_h]}static get pluginName(){return"ImageTextAlternativeUI"}init(){this._createButton(),this._createForm()}destroy(){super.destroy(),this._form.destroy()}_createButton(){const e=this.editor,t=e.t;e.ui.componentFactory.add("imageTextAlternative",i=>{const o=e.commands.get("imageTextAlternative"),n=new Ad(i);return n.set({label:t("Change image text alternative"),icon:Ic,tooltip:!0}),n.bind("isEnabled").to(o,"isEnabled"),this.listenTo(n,"execute",()=>{this._showForm()}),n})}_createForm(){const e=this.editor,t=e.editing.view.document;this._balloon=this.editor.plugins.get("ContextualBalloon"),this._form=new cf(e.locale),this._form.render(),this.listenTo(this._form,"submit",()=>{e.execute("imageTextAlternative",{newValue:this._form.labeledInput.fieldView.element.value}),this._hideForm(!0)}),this.listenTo(this._form,"cancel",()=>{this._hideForm(!0)}),this._form.keystrokes.set("Esc",(e,t)=>{this._hideForm(!0),t()}),this.listenTo(e.ui,"update",()=>{Qg(t.selection)?this._isVisible&&function(e){const t=e.plugins.get("ContextualBalloon");if(Qg(e.editing.view.document.selection)){const i=df(e);t.updatePosition(i)}}(e):this._hideForm(!0)}),Xc({emitter:this._form,activator:()=>this._isVisible,contextElements:[this._balloon.view.element],callback:()=>this._hideForm()})}_showForm(){if(this._isVisible)return;const e=this.editor,t=e.commands.get("imageTextAlternative"),i=this._form.labeledInput;this._form.disableCssTransitions(),this._isInBalloon||this._balloon.add({view:this._form,position:df(e)}),i.fieldView.value=i.fieldView.element.value=t.value||"",this._form.labeledInput.fieldView.select(),this._form.enableCssTransitions()}_hideForm(e){this._isInBalloon&&(this._form.focusTracker.isFocused&&this._form.saveButtonView.focus(),this._balloon.remove(this._form),e&&this.editor.editing.view.focus())}get _isVisible(){return this._balloon.visibleView===this._form}get _isInBalloon(){return this._balloon.hasView(this._form)}}class uf extends Qe{static get requires(){return[lf,hf]}static get pluginName(){return"ImageTextAlternative"}}i(76);function mf(e){for(const t of e.getChildren())if(t&&t.is("element","caption"))return t;return null}function gf(e){const t=e.parent;return"figcaption"==e.name&&t&&"figure"==t.name&&t.hasClass("image")?{name:!0}:null}class ff extends Qe{static get pluginName(){return"ImageCaptionEditing"}init(){const e=this.editor,t=e.editing.view,i=e.model.schema,o=e.data,n=e.editing,r=e.t;i.register("caption",{allowIn:"image",allowContentOf:"$block",isLimit:!0}),e.model.document.registerPostFixer(e=>this._insertMissingModelCaptionElement(e)),e.conversion.for("upcast").elementToElement({view:gf,model:"caption"});o.downcastDispatcher.on("insert:caption",pf(e=>e.createContainerElement("figcaption"),!1));const s=function(e,t){return i=>{const o=i.createEditableElement("figcaption");return i.setCustomProperty("imageCaption",!0,o),Rh({view:e,element:o,text:t}),Ag(o,i)}}(t,r("Enter image caption"));n.downcastDispatcher.on("insert:caption",pf(s)),n.downcastDispatcher.on("insert",this._fixCaptionVisibility(e=>e.item),{priority:"high"}),n.downcastDispatcher.on("remove",this._fixCaptionVisibility(e=>e.position.parent),{priority:"high"}),t.document.registerPostFixer(e=>this._updateCaptionVisibility(e))}_updateCaptionVisibility(e){const t=this.editor.editing.mapper,i=this._lastSelectedCaption;let o;const n=this.editor.model.document.selection,r=n.getSelectedElement();if(r&&r.is("element","image")){const e=mf(r);o=t.toViewElement(e)}const s=bf(n.getFirstPosition().parent);if(s&&(o=t.toViewElement(s)),o&&!this.editor.isReadOnly)return i?(i===o||(wf(i,e),this._lastSelectedCaption=o),kf(o,e)):(this._lastSelectedCaption=o,kf(o,e));if(i){const t=wf(i,e);return this._lastSelectedCaption=null,t}return!1}_fixCaptionVisibility(e){return(t,i,o)=>{const n=bf(e(i)),r=this.editor.editing.mapper,s=o.writer;if(n){const e=r.toViewElement(n);e&&(n.childCount?s.removeClass("ck-hidden",e):s.addClass("ck-hidden",e))}}}_insertMissingModelCaptionElement(e){const t=this.editor.model,i=t.document.differ.getChanges(),o=[];for(const e of i)if("insert"==e.type&&"$text"!=e.name){const i=e.position.nodeAfter;if(i.is("element","image")&&!mf(i)&&o.push(i),!i.is("element","image")&&i.childCount)for(const e of t.createRangeIn(i).getItems())e.is("element","image")&&!mf(e)&&o.push(e)}for(const t of o)e.appendElement("caption",t);return!!o.length}}function pf(e,t=!0){return(i,o,n)=>{const r=o.item;if((r.childCount||t)&&Xg(r.parent)){if(!n.consumable.consume(o.item,"insert"))return;const t=n.mapper.toViewElement(o.range.start.parent),i=e(n.writer),s=n.writer;r.childCount||s.addClass("ck-hidden",i),function(e,t,i,o){const n=o.writer.createPositionAt(i,"end");o.writer.insert(n,e),o.mapper.bindElements(t,e)}(i,o.item,t,n)}}}function bf(e){const t=e.getAncestors({includeSelf:!0}).find(e=>"caption"==e.name);return t&&t.parent&&"image"==t.parent.name?t:null}function wf(e,t){return!e.childCount&&!e.hasClass("ck-hidden")&&(t.addClass("ck-hidden",e),!0)}function kf(e,t){return!!e.hasClass("ck-hidden")&&(t.removeClass("ck-hidden",e),!0)}i(78);class _f extends Ze{constructor(e,t){super(e),this.defaultStyle=!1,this.styles=t.reduce((e,t)=>(e[t.name]=t,t.isDefault&&(this.defaultStyle=t.name),e),{})}refresh(){const e=this.editor.model.document.selection.getSelectedElement();if(this.isEnabled=Xg(e),e)if(e.hasAttribute("imageStyle")){const t=e.getAttribute("imageStyle");this.value=!!this.styles[t]&&t}else this.value=this.defaultStyle;else this.value=!1}execute(e){const t=e.value,i=this.editor.model,o=i.document.selection.getSelectedElement();i.change(e=>{this.styles[t].isDefault?e.removeAttribute("imageStyle",o):e.setAttribute("imageStyle",t,o)})}}function vf(e,t){for(const i of t)if(i.name===e)return i}const yf={full:{name:"full",title:"Full size image",icon:Wc,isDefault:!0},side:{name:"side",title:"Side image",icon:jc,className:"image-style-side"},alignLeft:{name:"alignLeft",title:"Left aligned image",icon:Lc,className:"image-style-align-left"},alignCenter:{name:"alignCenter",title:"Centered image",icon:Hc,className:"image-style-align-center"},alignRight:{name:"alignRight",title:"Right aligned image",icon:jc,className:"image-style-align-right"}},xf={full:Wc,left:Lc,right:jc,center:Hc};function Cf(e=[]){return e.map(Af)}function Af(e){if("string"==typeof e){const t=e;yf[t]?e=Object.assign({},yf[t]):(Object(l.b)("image-style-not-found",{name:t}),e={name:t})}else if(yf[e.name]){const t=yf[e.name],i=Object.assign({},e);for(const o in t)Object.prototype.hasOwnProperty.call(e,o)||(i[o]=t[o]);e=i}return"string"==typeof e.icon&&xf[e.icon]&&(e.icon=xf[e.icon]),e}class Tf extends Qe{static get pluginName(){return"ImageStyleEditing"}init(){const e=this.editor,t=e.model.schema,i=e.data,o=e.editing;e.config.define("image.styles",["full","side"]);const n=Cf(e.config.get("image.styles"));t.extend("image",{allowAttributes:"imageStyle"});const r=function(e){return(t,i,o)=>{if(!o.consumable.consume(i.item,t.name))return;const n=vf(i.attributeNewValue,e),r=vf(i.attributeOldValue,e),s=o.mapper.toViewElement(i.item),a=o.writer;r&&a.removeClass(r.className,s),n&&a.addClass(n.className,s)}}(n);o.downcastDispatcher.on("attribute:imageStyle:image",r),i.downcastDispatcher.on("attribute:imageStyle:image",r),i.upcastDispatcher.on("element:figure",function(e){const t=e.filter(e=>!e.isDefault);return(e,i,o)=>{if(!i.modelRange)return;const n=i.viewItem,r=Os(i.modelRange.getItems());if(!r||o.schema.checkAttribute(r,"imageStyle"))for(const e of t)o.consumable.consume(n,{classes:e.className})&&o.writer.setAttribute("imageStyle",e.name,r)}}(n),{priority:"low"}),e.commands.add("imageStyle",new _f(e,n))}}i(80);class Ef extends Qe{static get pluginName(){return"ImageStyleUI"}get localizedDefaultStylesTitles(){const e=this.editor.t;return{"Full size image":e("Full size image"),"Side image":e("Side image"),"Left aligned image":e("Left aligned image"),"Centered image":e("Centered image"),"Right aligned image":e("Right aligned image")}}init(){const e=function(e,t){for(const i of e)t[i.title]&&(i.title=t[i.title]);return e}(Cf(this.editor.config.get("image.styles")),this.localizedDefaultStylesTitles);for(const t of e)this._createButton(t)}_createButton(e){const t=this.editor,i="imageStyle:"+e.name;t.ui.componentFactory.add(i,i=>{const o=t.commands.get("imageStyle"),n=new Ad(i);return n.set({label:e.title,icon:e.icon,tooltip:!0,isToggleable:!0}),n.bind("isEnabled").to(o,"isEnabled"),n.bind("isOn").to(o,"value",t=>t===e.name),this.listenTo(n,"execute",()=>{t.execute("imageStyle",{value:e.name}),t.editing.view.focus()}),n})}}function Pf(e){const t=e.map(e=>e.replace("+","\\+"));return new RegExp(`^image\\/(${t.join("|")})$`)}function Sf(e){return new Promise((t,i)=>{const o=e.getAttribute("src");fetch(o).then(e=>e.blob()).then(e=>{const i=Rf(e,o),n=i.replace("image/",""),r=new File([e],"image."+n,{type:i});t(r)}).catch(e=>e&&"TypeError"===e.name?function(e){return function(e){return new Promise((t,i)=>{const o=vr.document.createElement("img");o.addEventListener("load",()=>{const e=vr.document.createElement("canvas");e.width=o.width,e.height=o.height;e.getContext("2d").drawImage(o,0,0),e.toBlob(e=>e?t(e):i())}),o.addEventListener("error",()=>i()),o.src=e})}(e).then(t=>{const i=Rf(t,e),o=i.replace("image/","");return new File([t],"image."+o,{type:i})})}(o).then(t).catch(i):i(e))})}function Rf(e,t){return e.type?e.type:t.match(/data:(image\/\w+);base64/)?t.match(/data:(image\/\w+);base64/)[1].toLowerCase():"image/jpeg"}class If extends Qe{static get pluginName(){return"ImageUploadUI"}init(){const e=this.editor,t=e.t,i=i=>{const o=new ju(i),n=e.commands.get("uploadImage"),r=e.config.get("image.upload.types"),s=Pf(r);return o.set({acceptedType:r.map(e=>"image/"+e).join(","),allowMultipleFiles:!0}),o.buttonView.set({label:t("Insert image"),icon:Vc,tooltip:!0}),o.buttonView.bind("isEnabled").to(n),o.on("done",(t,i)=>{const o=Array.from(i).filter(e=>s.test(e.type));o.length&&e.execute("uploadImage",{file:o})}),o};e.ui.componentFactory.add("uploadImage",i),e.ui.componentFactory.add("imageUpload",i)}}i(82),i(84),i(86);class Vf extends Qe{static get pluginName(){return"ImageUploadProgress"}constructor(e){super(e),this.placeholder="data:image/svg+xml;utf8,"+encodeURIComponent('')}init(){this.editor.editing.downcastDispatcher.on("attribute:uploadStatus:image",(...e)=>this.uploadStatusChange(...e))}uploadStatusChange(e,t,i){const o=this.editor,n=t.item,r=n.getAttribute("uploadId");if(!i.consumable.consume(t.item,e.name))return;const s=o.plugins.get(Lu),a=r?t.attributeNewValue:null,l=this.placeholder,c=o.editing.mapper.toViewElement(n),d=i.writer;if("reading"==a)return zf(c,d),void Of(l,c,d);if("uploading"==a){const e=s.loaders.get(r);return zf(c,d),void(e?(Mf(c,d),function(e,t,i,o){const n=function(e){const t=e.createUIElement("div",{class:"ck-progress-bar"});return e.setCustomProperty("progressBar",!0,t),t}(t);t.insert(t.createPositionAt(e,"end"),n),i.on("change:uploadedPercent",(e,t,i)=>{o.change(e=>{e.setStyle("width",i+"%",n)})})}(c,d,e,o.editing.view),function(e,t,i){if(i.data){const o=tf(e);t.setAttribute("src",i.data,o)}}(c,d,e)):Of(l,c,d))}"complete"==a&&s.loaders.get(r)&&function(e,t,i){const o=t.createUIElement("div",{class:"ck-image-upload-complete-icon"});t.insert(t.createPositionAt(e,"end"),o),setTimeout(()=>{i.change(e=>e.remove(e.createRangeOn(o)))},3e3)}(c,d,o.editing.view),function(e,t){Bf(e,t,"progressBar")}(c,d),Mf(c,d),function(e,t){t.removeClass("ck-appear",e)}(c,d)}}function zf(e,t){e.hasClass("ck-appear")||t.addClass("ck-appear",e)}function Of(e,t,i){t.hasClass("ck-image-upload-placeholder")||i.addClass("ck-image-upload-placeholder",t);const o=tf(t);o.getAttribute("src")!==e&&i.setAttribute("src",e,o),Nf(t,"placeholder")||i.insert(i.createPositionAfter(o),function(e){const t=e.createUIElement("div",{class:"ck-upload-placeholder-loader"});return e.setCustomProperty("placeholder",!0,t),t}(i))}function Mf(e,t){e.hasClass("ck-image-upload-placeholder")&&t.removeClass("ck-image-upload-placeholder",e),Bf(e,t,"placeholder")}function Nf(e,t){for(const i of e.getChildren())if(i.getCustomProperty(t))return i}function Bf(e,t,i){const o=Nf(e,i);o&&t.remove(t.createRangeOn(o))}class Ff{constructor(e){this.files=function(e){const t=e.files?Array.from(e.files):[],i=e.items?Array.from(e.items):[];if(t.length)return t;return i.filter(e=>"file"===e.kind).map(e=>e.getAsFile())}(e),this._native=e}get types(){return this._native.types}getData(e){return this._native.getData(e)}setData(e,t){this._native.setData(e,t)}set effectAllowed(e){this._native.effectAllowed=e}get effectAllowed(){return this._native.effectAllowed}set dropEffect(e){this._native.dropEffect=e}get dropEffect(){return this._native.dropEffect}get isCanceled(){return"none"==this._native.dropEffect||!!this._native.mozUserCancelled}}class Df extends is{constructor(e){super(e);const t=this.document;function i(e){return(i,o)=>{o.preventDefault();const r=o.dropRange?[o.dropRange]:null,s=new n(t,e);t.fire(s,{dataTransfer:o.dataTransfer,method:i.name,targetRanges:r,target:o.target}),s.stop.called&&o.stopPropagation()}}this.domEventType=["paste","copy","cut","drop","dragover","dragstart","dragend","dragenter","dragleave"],this.listenTo(t,"paste",i("clipboardInput"),{priority:"low"}),this.listenTo(t,"drop",i("clipboardInput"),{priority:"low"}),this.listenTo(t,"dragover",i("dragging"),{priority:"low"})}onDomEvent(e){const t={dataTransfer:new Ff(e.clipboardData?e.clipboardData:e.dataTransfer)};"drop"!=e.type&&"dragover"!=e.type||(t.dropRange=function(e,t){const i=t.target.ownerDocument,o=t.clientX,n=t.clientY;let r;i.caretRangeFromPoint&&i.caretRangeFromPoint(o,n)?r=i.caretRangeFromPoint(o,n):t.rangeParent&&(r=i.createRange(),r.setStart(t.rangeParent,t.rangeOffset),r.collapse(!0));if(r)return e.domConverter.domRangeToView(r);return null}(this.view,e)),this.fire(e.type,e,t)}}const Lf=["figcaption","li"];class Hf extends Qe{static get pluginName(){return"ClipboardPipeline"}init(){this.editor.editing.view.addObserver(Df),this._setupPasteDrop(),this._setupCopyCut()}_setupPasteDrop(){const e=this.editor,t=e.model,i=e.editing.view,o=i.document;this.listenTo(o,"clipboardInput",t=>{e.isReadOnly&&t.stop()},{priority:"highest"}),this.listenTo(o,"clipboardInput",(e,t)=>{const o=t.dataTransfer;let r=t.content||"";var s;r||(o.getData("text/html")?r=function(e){return e.replace(/(\s+)<\/span>/g,(e,t)=>1==t.length?" ":t)}(o.getData("text/html")):o.getData("text/plain")&&(((s=(s=o.getData("text/plain")).replace(//g,">").replace(/\r?\n\r?\n/g,"

").replace(/\r?\n/g,"
").replace(/^\s/," ").replace(/\s$/," ").replace(/\s\s/g,"  ")).includes("

")||s.includes("
"))&&(s=`

${s}

`),r=s),r=this.editor.data.htmlProcessor.toView(r));const a=new n(this,"inputTransformation");this.fire(a,{content:r,dataTransfer:o,targetRanges:t.targetRanges,method:t.method}),a.stop.called&&e.stop(),i.scrollToTheSelection()},{priority:"low"}),this.listenTo(this,"inputTransformation",(e,i)=>{if(i.content.isEmpty)return;const o=this.editor.data.toModel(i.content,"$clipboardHolder");0!=o.childCount&&(e.stop(),t.change(()=>{this.fire("contentInsertion",{content:o,method:i.method,dataTransfer:i.dataTransfer,targetRanges:i.targetRanges})}))},{priority:"low"}),this.listenTo(this,"contentInsertion",(e,i)=>{i.resultRange=t.insertContent(i.content)},{priority:"low"})}_setupCopyCut(){const e=this.editor,t=e.model.document,i=e.editing.view.document;function o(o,n){const r=n.dataTransfer;n.preventDefault();const s=e.data.toView(e.model.getSelectedContent(t.selection));i.fire("clipboardOutput",{dataTransfer:r,content:s,method:o.name})}this.listenTo(i,"copy",o,{priority:"low"}),this.listenTo(i,"cut",(t,i)=>{e.isReadOnly?i.preventDefault():o(t,i)},{priority:"low"}),this.listenTo(i,"clipboardOutput",(i,o)=>{o.content.isEmpty||(o.dataTransfer.setData("text/html",this.editor.data.htmlProcessor.toData(o.content)),o.dataTransfer.setData("text/plain",function e(t){let i="";if(t.is("$text")||t.is("$textProxy"))i=t.data;else if(t.is("element","img")&&t.hasAttribute("alt"))i=t.getAttribute("alt");else if(t.is("element","br"))i="\n";else{let o=null;for(const n of t.getChildren()){const t=e(n);o&&(o.is("containerElement")||n.is("containerElement"))&&(Lf.includes(o.name)||Lf.includes(n.name)?i+="\n":i+="\n\n"),i+=t,o=n}}return i}(o.content))),"cut"==o.method&&e.model.deleteContent(t.selection)},{priority:"low"})}}i(88);class jf extends Qe{static get pluginName(){return"DragDrop"}static get requires(){return[Hf,Dg]}init(){const e=this.editor,t=e.editing.view;this._draggedRange=null,this._draggingUid="",this._draggableElement=null,this._updateDropMarkerThrottled=Kg(e=>this._updateDropMarker(e),40),this._removeDropMarkerDelayed=$f(()=>this._removeDropMarker(),40),this._clearDraggableAttributesDelayed=$f(()=>this._clearDraggableAttributes(),40),t.addObserver(Df),t.addObserver(Kh),this._setupDragging(),this._setupContentInsertionIntegration(),this._setupClipboardInputIntegration(),this._setupDropMarker(),this._setupDraggableAttributeHandling(),this.listenTo(e,"change:isReadOnly",(e,t,i)=>{i?this.forceDisabled("readOnlyMode"):this.clearForceDisabled("readOnlyMode")}),this.on("change:isEnabled",(e,t,i)=>{i||this._finalizeDragging(!1)}),Sn.isAndroid&&this.forceDisabled("noAndroidSupport")}destroy(){return this._draggedRange&&(this._draggedRange.detach(),this._draggedRange=null),this._updateDropMarkerThrottled.cancel(),this._removeDropMarkerDelayed.cancel(),this._clearDraggableAttributesDelayed.cancel(),super.destroy()}_setupDragging(){const e=this.editor,t=e.model,i=t.document,o=e.editing.view,n=o.document;this.listenTo(n,"dragstart",(o,r)=>{const a=i.selection;if(r.target&&r.target.is("editableElement"))return void r.preventDefault();const l=r.target?Uf(r.target):null;if(l){const i=e.editing.mapper.toModelElement(l);this._draggedRange=ka.fromRange(t.createRangeOn(i))}else if(!n.selection.isCollapsed){const e=n.selection.getSelectedElement();e&&kg(e)||(this._draggedRange=ka.fromRange(a.getFirstRange()))}if(!this._draggedRange)return void r.preventDefault();this._draggingUid=s(),r.dataTransfer.effectAllowed=this.isEnabled?"copyMove":"copy",r.dataTransfer.setData("application/ckeditor5-dragging-uid",this._draggingUid);const c=t.createSelection(this._draggedRange.toRange()),d=e.data.toView(t.getSelectedContent(c));n.fire("clipboardOutput",{dataTransfer:r.dataTransfer,content:d,method:o.name}),this.isEnabled||(this._draggedRange.detach(),this._draggedRange=null,this._draggingUid="")},{priority:"low"}),this.listenTo(n,"dragend",(e,t)=>{this._finalizeDragging(!t.dataTransfer.isCanceled&&"move"==t.dataTransfer.dropEffect)},{priority:"low"}),this.listenTo(n,"dragenter",()=>{this.isEnabled&&o.focus()}),this.listenTo(n,"dragleave",()=>{this._removeDropMarkerDelayed()}),this.listenTo(n,"dragging",(t,i)=>{if(!this.isEnabled)return void(i.dataTransfer.dropEffect="none");this._removeDropMarkerDelayed.cancel();const o=Wf(e,i.targetRanges,i.target);this._draggedRange||(i.dataTransfer.dropEffect="copy"),Sn.isGecko||("copy"==i.dataTransfer.effectAllowed?i.dataTransfer.dropEffect="copy":["all","copyMove"].includes(i.dataTransfer.effectAllowed)&&(i.dataTransfer.dropEffect="move")),o&&this._updateDropMarkerThrottled(o)},{priority:"low"})}_setupClipboardInputIntegration(){const e=this.editor,t=e.editing.view.document;this.listenTo(t,"clipboardInput",(t,i)=>{if("drop"!=i.method)return;const o=Wf(e,i.targetRanges,i.target);if(this._removeDropMarker(),!o)return this._finalizeDragging(!1),void t.stop();this._draggedRange&&this._draggingUid!=i.dataTransfer.getData("application/ckeditor5-dragging-uid")&&(this._draggedRange.detach(),this._draggedRange=null,this._draggingUid="");if("move"==qf(i.dataTransfer)&&this._draggedRange&&this._draggedRange.containsRange(o,!0))return this._finalizeDragging(!1),void t.stop();i.targetRanges=[e.editing.mapper.toViewRange(o)]},{priority:"high"})}_setupContentInsertionIntegration(){const e=this.editor.plugins.get(Hf);e.on("contentInsertion",(e,t)=>{if(!this.isEnabled||"drop"!==t.method)return;const i=t.targetRanges.map(e=>this.editor.editing.mapper.toModelRange(e));this.editor.model.change(e=>e.setSelection(i))},{priority:"high"}),e.on("contentInsertion",(e,t)=>{if(!this.isEnabled||"drop"!==t.method)return;const i="move"==qf(t.dataTransfer),o=!t.resultRange||!t.resultRange.isCollapsed;this._finalizeDragging(o&&i)},{priority:"lowest"})}_setupDraggableAttributeHandling(){const e=this.editor,t=e.editing.view,i=t.document;this.listenTo(i,"mousedown",(o,n)=>{if(Sn.isAndroid||!n)return;this._clearDraggableAttributesDelayed.cancel();let r=Uf(n.target);if(Sn.isBlink&&!e.isReadOnly&&!r&&!i.selection.isCollapsed){const e=i.selection.getSelectedElement();e&&kg(e)||(r=i.selection.editableElement)}r&&(t.change(e=>{e.setAttribute("draggable","true",r)}),this._draggableElement=e.editing.mapper.toModelElement(r))}),this.listenTo(i,"mouseup",()=>{Sn.isAndroid||this._clearDraggableAttributesDelayed()})}_clearDraggableAttributes(){const e=this.editor.editing;e.view.change(t=>{this._draggableElement&&"$graveyard"!=this._draggableElement.root.rootName&&t.removeAttribute("draggable",e.mapper.toViewElement(this._draggableElement)),this._draggableElement=null})}_setupDropMarker(){const e=this.editor;e.conversion.for("editingDowncast").markerToHighlight({model:"drop-target",view:{classes:["ck-clipboard-drop-target-range"]}}),e.conversion.for("editingDowncast").markerToElement({model:"drop-target",view:(t,{writer:i})=>{if(e.model.schema.checkChild(t.markerRange.start,"$text"))return i.createUIElement("span",{class:"ck ck-clipboard-drop-target-position"},(function(e){const t=this.toDomElement(e);return t.innerHTML="⁠⁠",t}))}})}_updateDropMarker(e){const t=this.editor,i=t.model.markers;t.model.change(t=>{i.has("drop-target")?i.get("drop-target").getRange().isEqual(e)||t.updateMarker("drop-target",{range:e}):t.addMarker("drop-target",{range:e,usingOperation:!1,affectsData:!1})})}_removeDropMarker(){const e=this.editor.model;this._removeDropMarkerDelayed.cancel(),this._updateDropMarkerThrottled.cancel(),e.markers.has("drop-target")&&e.change(e=>{e.removeMarker("drop-target")})}_finalizeDragging(e){const t=this.editor.model;this._removeDropMarker(),this._clearDraggableAttributes(),this._draggingUid="",this._draggedRange&&(e&&this.isEnabled&&t.deleteContent(t.createSelection(this._draggedRange),{doNotAutoparagraph:!0}),this._draggedRange.detach(),this._draggedRange=null)}}function Wf(e,t,i){const o=e.model,n=e.editing.mapper;let r=null;const s=t?t[0].start:null;if(i.is("uiElement")&&(i=i.parent),r=function(e,t){const i=e.model,o=e.editing.mapper;if(kg(t))return i.createRangeOn(o.toModelElement(t));if(!t.is("editableElement")){const e=t.findAncestor(e=>kg(e)||e.is("editableElement"));if(kg(e))return i.createRangeOn(o.toModelElement(e))}return null}(e,i),r)return r;const a=function(e,t){const i=e.editing.mapper,o=e.editing.view,n=i.toModelElement(t);if(n)return n;const r=o.createPositionBefore(t),s=i.findMappedViewAncestor(r);return i.toModelElement(s)}(e,i),l=s?n.toModelPosition(s):null;return l?(r=function(e,t,i){const o=e.model;if(!o.schema.checkChild(i,"$block"))return null;const n=o.createPositionAt(i,0),r=t.path.slice(0,n.path.length),s=o.createPositionFromPath(t.root,r).nodeAfter;if(s&&o.schema.isObject(s))return o.createRangeOn(s);return null}(e,l,a),r||(r=o.schema.getNearestSelectionRange(l,Sn.isGecko?"forward":"backward"),r||function(e,t){const i=e.model;for(;t;){if(i.schema.isObject(t))return i.createRangeOn(t);t=t.parent}}(e,l.parent))):function(e,t){const i=e.model,o=i.schema,n=i.createPositionAt(t,0);return o.getNearestSelectionRange(n,"forward")}(e,a)}function qf(e){return Sn.isGecko?e.dropEffect:["all","copyMove"].includes(e.effectAllowed)?"move":"copy"}function $f(e,t){let i;function o(...n){o.cancel(),i=setTimeout(()=>e(...n),t)}return o.cancel=()=>{clearTimeout(i)},o}function Uf(e){if(e.is("editableElement"))return null;if(e.hasClass("ck-widget__selection-handle"))return e.findAncestor(kg);if(kg(e))return e;const t=e.findAncestor(e=>kg(e)||e.is("editableElement"));return kg(t)?t:null}class Kf extends Qe{static get pluginName(){return"PastePlainText"}static get requires(){return[Hf]}init(){const e=this.editor,t=e.model,i=e.editing.view,o=i.document,n=t.document.selection;let r=!1;i.addObserver(Df),this.listenTo(o,"keydown",(e,t)=>{r=t.shiftKey}),e.plugins.get(Hf).on("contentInsertion",(e,i)=>{(r||function(e,t){if(e.childCount>1)return!1;const i=e.getChild(0);if(t.isObject(i))return!1;return 0==[...i.getAttributeKeys()].length}(i.content,t.schema))&&t.change(e=>{const o=Array.from(n.getAttributes()).filter(([e])=>t.schema.getAttributeProperties(e).isFormatting);n.isCollapsed||t.deleteContent(n,{doNotAutoparagraph:!0}),o.push(...n.getAttributes());const r=e.createRangeIn(i.content);for(const t of r.getItems())t.is("$textProxy")&&e.setAttributes(o,t)})})}}class Gf extends Qe{static get pluginName(){return"Clipboard"}static get requires(){return[Hf,jf,Kf]}}class Jf extends Ze{refresh(){const e=this.editor.model.document.selection.getSelectedElement(),t=e&&"image"===e.name||!1;this.isEnabled=ef(this.editor.model)||t}execute(e){const t=this.editor,i=t.model,o=t.plugins.get(Lu);for(const t of to(e.file))Yf(i,o,t)}}function Yf(e,t,i){const o=t.createLoader(i);o&&Zg(e,{uploadId:o.id})}class Qf extends Qe{static get requires(){return[Lu,hh,Hf]}static get pluginName(){return"ImageUploadEditing"}constructor(e){super(e),e.config.define("image",{upload:{types:["jpeg","png","gif","bmp","webp","tiff"]}})}init(){const e=this.editor,t=e.model.document,i=e.model.schema,o=e.conversion,n=e.plugins.get(Lu),r=Pf(e.config.get("image.upload.types"));i.extend("image",{allowAttributes:["uploadId","uploadStatus"]});const s=new Jf(e);e.commands.add("uploadImage",s),e.commands.add("imageUpload",s),o.for("upcast").attributeToAttribute({view:{name:"img",key:"uploadId"},model:"uploadId"}),this.listenTo(e.editing.view.document,"clipboardInput",(t,i)=>{if(o=i.dataTransfer,Array.from(o.types).includes("text/html")&&""!==o.getData("text/html"))return;var o;const n=Array.from(i.dataTransfer.files).filter(e=>!!e&&r.test(e.type));n.length&&(t.stop(),e.model.change(t=>{i.targetRanges&&t.setSelection(i.targetRanges.map(t=>e.editing.mapper.toModelRange(t))),e.model.enqueueChange("default",()=>{e.execute("uploadImage",{file:n})})}))}),this.listenTo(e.plugins.get("ClipboardPipeline"),"inputTransformation",(t,i)=>{const o=Array.from(e.editing.view.createRangeIn(i.content)).filter(e=>{return!(!(t=e.item).is("element","img")||!t.getAttribute("src"))&&(t.getAttribute("src").match(/^data:image\/\w+;base64,/g)||t.getAttribute("src").match(/^blob:/g))&&!e.item.getAttribute("uploadProcessed");var t}).map(e=>({promise:Sf(e.item),imageElement:e.item}));if(!o.length)return;const r=new Gh(e.editing.view.document);for(const e of o){r.setAttribute("uploadProcessed",!0,e.imageElement);const t=n.createLoader(e.promise);t&&(r.setAttribute("src","",e.imageElement),r.setAttribute("uploadId",t.id,e.imageElement))}}),e.editing.view.document.on("dragover",(e,t)=>{t.preventDefault()}),t.on("change",()=>{const i=t.differ.getChanges({includeChangesInGraveyard:!0});for(const t of i)if("insert"==t.type&&"$text"!=t.name){const i=t.position.nodeAfter,o="$graveyard"==t.position.root.rootName;for(const t of Xf(e,i)){const e=t.getAttribute("uploadId");if(!e)continue;const i=n.loaders.get(e);i&&(o?i.abort():"idle"==i.status&&this._readAndUpload(i,t))}}}),this.on("uploadComplete",(e,{imageElement:t,data:i})=>{const o=i.urls?i.urls:i;this.editor.model.change(e=>{e.setAttribute("src",o.default,t),this._parseAndSetSrcsetAttributeOnImage(o,t,e)})},{priority:"low"})}_readAndUpload(e,t){const i=this.editor,o=i.model,n=i.locale.t,r=i.plugins.get(Lu),s=i.plugins.get(hh);return o.enqueueChange("transparent",e=>{e.setAttribute("uploadStatus","reading",t)}),e.read().then(()=>{const n=e.upload();if(Sn.isSafari){const e=tf(i.editing.mapper.toViewElement(t));i.editing.view.once("render",()=>{if(!e.parent)return;const t=i.editing.view.domConverter.mapViewToDom(e.parent);if(!t)return;const o=t.style.display;t.style.display="none",t._ckHack=t.offsetHeight,t.style.display=o})}return o.enqueueChange("transparent",e=>{e.setAttribute("uploadStatus","uploading",t)}),n}).then(e=>{o.enqueueChange("transparent",i=>{i.setAttribute("uploadStatus","complete",t),this.fire("uploadComplete",{data:e,imageElement:t})}),a()}).catch(i=>{if("error"!==e.status&&"aborted"!==e.status)throw i;"error"==e.status&&i&&s.showWarning(i,{title:n("Upload failed"),namespace:"upload"}),a(),o.enqueueChange("transparent",e=>{e.remove(t)})});function a(){o.enqueueChange("transparent",e=>{e.removeAttribute("uploadId",t),e.removeAttribute("uploadStatus",t)}),r.destroyLoader(e)}}_parseAndSetSrcsetAttributeOnImage(e,t,i){let o=0;const n=Object.keys(e).filter(e=>{const t=parseInt(e,10);if(!isNaN(t))return o=Math.max(o,t),!0}).map(t=>`${e[t]} ${t}w`).join(", ");""!=n&&i.setAttribute("srcset",{data:n,width:o},t)}}function Xf(e,t){return Array.from(e.model.createRangeOn(t)).filter(e=>e.item.is("element","image")).map(e=>e.item)}class Zf extends Ze{refresh(){const e=this.editor.model.document.selection.getSelectedElement();this.isEnabled=Xg(e),e&&e.hasAttribute("width")?this.value={width:e.getAttribute("width"),height:null}:this.value=null}execute(e){const t=this.editor.model,i=t.document.selection.getSelectedElement();this.value={width:e.width,height:null},i&&t.change(t=>{t.setAttribute("width",e.width,i)})}}class ep extends Qe{static get pluginName(){return"ImageResizeEditing"}constructor(e){super(e),e.config.define("image",{resizeUnit:"%",resizeOptions:[{name:"resizeImage:original",value:null,icon:"original"},{name:"resizeImage:25",value:"25",icon:"small"},{name:"resizeImage:50",value:"50",icon:"medium"},{name:"resizeImage:75",value:"75",icon:"large"}]})}init(){const e=this.editor,t=new Zf(e);this._registerSchema(),this._registerConverters(),e.commands.add("resizeImage",t),e.commands.add("imageResize",t)}_registerSchema(){this.editor.model.schema.extend("image",{allowAttributes:"width"}),this.editor.model.schema.setAttributeProperties("width",{isFormatting:!0})}_registerConverters(){const e=this.editor;e.conversion.for("downcast").add(e=>e.on("attribute:width:image",(e,t,i)=>{if(!i.consumable.consume(t.item,e.name))return;const o=i.writer,n=i.mapper.toViewElement(t.item);null!==t.attributeNewValue?(o.setStyle("width",t.attributeNewValue,n),o.addClass("image_resized",n)):(o.removeStyle("width",n),o.removeClass("image_resized",n))})),e.conversion.for("upcast").attributeToAttribute({view:{name:"figure",styles:{width:/.+/}},model:{key:"width",value:e=>e.getStyle("width")}})}}const tp={small:Uc,medium:Kc,large:$c,original:qc};class ip extends Qe{static get requires(){return[ep]}static get pluginName(){return"ImageResizeButtons"}constructor(e){super(e),this._resizeUnit=e.config.get("image.resizeUnit")}init(){const e=this.editor,t=e.config.get("image.resizeOptions"),i=e.commands.get("resizeImage");this.bind("isEnabled").to(i);for(const e of t)this._registerImageResizeButton(e);this._registerImageResizeDropdown(t)}_registerImageResizeButton(e){const t=this.editor,{name:i,value:o,icon:n}=e,r=o?o+this._resizeUnit:null;t.ui.componentFactory.add(i,i=>{const o=new Ad(i),s=t.commands.get("resizeImage"),a=this._getOptionLabelValue(e,!0);if(!tp[n])throw new l.a("imageresizebuttons-missing-icon",t,e);return o.set({label:a,icon:tp[n],tooltip:a,isToggleable:!0}),o.bind("isEnabled").to(this),o.bind("isOn").to(s,"value",op(r)),this.listenTo(o,"execute",()=>{t.execute("resizeImage",{width:r})}),o})}_registerImageResizeDropdown(e){const t=this.editor,i=t.t,o=e.find(e=>!e.value),n=n=>{const r=t.commands.get("resizeImage"),s=Zd(n,Md),a=s.buttonView;return a.set({tooltip:i("Resize image"),commandValue:o.value,icon:tp.medium,isToggleable:!0,label:this._getOptionLabelValue(o),withText:!0,class:"ck-resize-image-button"}),a.bind("label").to(r,"value",e=>e&&e.width?e.width:this._getOptionLabelValue(o)),s.bind("isOn").to(r),s.bind("isEnabled").to(this),th(s,this._getResizeDropdownListItemDefinitions(e,r)),s.listView.ariaLabel=i("Image resize list"),this.listenTo(s,"execute",e=>{t.execute(e.source.commandName,{width:e.source.commandValue}),t.editing.view.focus()}),s};t.ui.componentFactory.add("resizeImage",n),t.ui.componentFactory.add("imageResize",n)}_getOptionLabelValue(e,t){const i=this.editor.t;return e.label?e.label:t?e.value?i("Resize image to %0",e.value+this._resizeUnit):i("Resize image to the original size"):e.value?e.value+this._resizeUnit:i("Original")}_getResizeDropdownListItemDefinitions(e,t){const i=new Zi;return e.map(e=>{const o=e.value?e.value+this._resizeUnit:null,n={type:"button",model:new uh({commandName:"resizeImage",commandValue:o,label:this._getOptionLabelValue(e),withText:!0,icon:null})};n.model.bind("isOn").to(t,"value",op(o)),i.add(n)}),i}}function op(e){return t=>null===e&&t===e||t&&t.width===e}class np extends Qe{static get requires(){return[Gg]}static get pluginName(){return"ImageResizeHandles"}init(){const e=this.editor.commands.get("resizeImage");this.bind("isEnabled").to(e),this._setupResizerCreator()}_setupResizerCreator(){const e=this.editor,t=e.editing.view;t.addObserver(Jg),this.listenTo(t.document,"imageLoaded",(i,o)=>{if(!o.target.matches("figure.image.ck-widget > img, figure.image.ck-widget > a > img"))return;const n=e.editing.view.domConverter.domToView(o.target).findAncestor("figure");let r=this.editor.plugins.get(Gg).getResizerByViewElement(n);if(r)return void r.redraw();const s=e.editing.mapper.toModelElement(n);r=e.plugins.get(Gg).attachTo({unit:e.config.get("image.resizeUnit"),modelElement:s,viewElement:n,editor:e,getHandleHost:e=>e.querySelector("img"),getResizeHost:e=>e,isCentered(){const e=s.getAttribute("imageStyle");return!e||"full"==e||"alignCenter"==e},onCommit(t){e.execute("resizeImage",{width:t})}}),r.on("updateSize",()=>{n.hasClass("image_resized")||t.change(e=>{e.addClass("image_resized",n)})}),r.bind("isEnabled").to(this)})}}i(90);class rp{constructor(){this._definitions=new Set}get length(){return this._definitions.size}add(e){Array.isArray(e)?e.forEach(e=>this._definitions.add(e)):this._definitions.add(e)}getDispatcher(){return e=>{e.on("attribute:linkHref",(e,t,i)=>{if(!i.consumable.test(t.item,"attribute:linkHref"))return;const o=i.writer,n=o.document.selection;for(const e of this._definitions){const r=o.createAttributeElement("a",e.attributes,{priority:5});o.setCustomProperty("link",!0,r),e.callback(t.attributeNewValue)?t.item.is("selection")?o.wrap(n.getFirstRange(),r):o.wrap(i.mapper.toViewRange(t.range),r):o.unwrap(i.mapper.toViewRange(t.range),r)}},{priority:"high"})}}getDispatcherForLinkedImage(){return e=>{e.on("attribute:linkHref:image",(e,t,i)=>{const o=i.mapper.toViewElement(t.item),n=Array.from(o.getChildren()).find(e=>"a"===e.name);for(const e of this._definitions){const o=go(e.attributes);if(e.callback(t.attributeNewValue))for(const[e,t]of o)"class"===e?i.writer.addClass(t,n):i.writer.setAttribute(e,t,n);else for(const[e,t]of o)"class"===e?i.writer.removeClass(t,n):i.writer.removeAttribute(e,n)}})}}}var sp=function(e,t,i){var o=e.length;return i=void 0===i?o:i,!t&&i>=o?e:Mo(e,t,i)},ap=RegExp("[\\u200d\\ud800-\\udfff\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff\\ufe0e\\ufe0f]");var lp=function(e){return ap.test(e)};var cp=function(e){return e.split("")},dp="[\\ud800-\\udfff]",hp="[\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff]",up="\\ud83c[\\udffb-\\udfff]",mp="[^\\ud800-\\udfff]",gp="(?:\\ud83c[\\udde6-\\uddff]){2}",fp="[\\ud800-\\udbff][\\udc00-\\udfff]",pp="(?:"+hp+"|"+up+")"+"?",bp="[\\ufe0e\\ufe0f]?"+pp+("(?:\\u200d(?:"+[mp,gp,fp].join("|")+")[\\ufe0e\\ufe0f]?"+pp+")*"),wp="(?:"+[mp+hp+"?",hp,gp,fp,dp].join("|")+")",kp=RegExp(up+"(?="+up+")|"+wp+bp,"g");var _p=function(e){return e.match(kp)||[]};var vp=function(e){return lp(e)?_p(e):cp(e)};var yp=function(e){return function(t){t=Ro(t);var i=lp(t)?vp(t):void 0,o=i?i[0]:t.charAt(0),n=i?sp(i,1).join(""):t.slice(1);return o[e]()+n}}("toUpperCase");const xp=/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205f\u3000]/g,Cp=/^(?:(?:https?|ftps?|mailto):|[^a-z]|[a-z+.-]+(?:[^a-z+.:-]|$))/i,Ap=/^[\S]+@((?![-_])(?:[-\w\u00a1-\uffff]{0,63}[^-_]\.))+(?:[a-z\u00a1-\uffff]{2,})$/i,Tp=/^((\w+:(\/{2,})?)|(\W))/i;function Ep(e,{writer:t}){const i=t.createAttributeElement("a",{href:e},{priority:5});return t.setCustomProperty("link",!0,i),i}function Pp(e){return function(e){return e.replace(xp,"").match(Cp)}(e=String(e))?e:"#"}function Sp(e,t){return!!e&&(e.is("element","image")&&t.checkAttribute("image","linkHref"))}function Rp(e,t){const i=(o=e,Ap.test(o)?"mailto:":t);var o;const n=!!i&&!Tp.test(e);return e&&n?i+e:e}class Ip extends Ze{constructor(e){super(e),this.manualDecorators=new Zi,this.automaticDecorators=new rp}restoreManualDecoratorStates(){for(const e of this.manualDecorators)e.value=this._getDecoratorStateFromModel(e.id)}refresh(){const e=this.editor.model,t=e.document,i=Os(t.selection.getSelectedBlocks());Sp(i,e.schema)?(this.value=i.getAttribute("linkHref"),this.isEnabled=e.schema.checkAttribute(i,"linkHref")):(this.value=t.selection.getAttribute("linkHref"),this.isEnabled=e.schema.checkAttributeInSelection(t.selection,"linkHref"));for(const e of this.manualDecorators)e.value=this._getDecoratorStateFromModel(e.id)}execute(e,t={}){const i=this.editor.model,o=i.document.selection,n=[],r=[];for(const e in t)t[e]?n.push(e):r.push(e);i.change(t=>{if(o.isCollapsed){const s=o.getFirstPosition();if(o.hasAttribute("linkHref")){const a=Dm(s,"linkHref",o.getAttribute("linkHref"),i);t.setAttribute("linkHref",e,a),n.forEach(e=>{t.setAttribute(e,!0,a)}),r.forEach(e=>{t.removeAttribute(e,a)}),t.setSelection(t.createPositionAfter(a.end.nodeBefore))}else if(""!==e){const r=go(o.getAttributes());r.set("linkHref",e),n.forEach(e=>{r.set(e,!0)});const{end:a}=i.insertContent(t.createText(e,r),s);t.setSelection(a)}["linkHref",...n,...r].forEach(e=>{t.removeSelectionAttribute(e)})}else{const s=i.schema.getValidRanges(o.getRanges(),"linkHref"),a=[];for(const e of o.getSelectedBlocks())i.schema.checkAttribute(e,"linkHref")&&a.push(t.createRangeOn(e));const l=a.slice();for(const e of s)this._isRangeToUpdate(e,a)&&l.push(e);for(const i of l)t.setAttribute("linkHref",e,i),n.forEach(e=>{t.setAttribute(e,!0,i)}),r.forEach(e=>{t.removeAttribute(e,i)})}})}_getDecoratorStateFromModel(e){const t=this.editor.model,i=t.document,o=Os(i.selection.getSelectedBlocks());return Sp(o,t.schema)?o.getAttribute(e):i.selection.getAttribute(e)}_isRangeToUpdate(e,t){for(const i of t)if(i.containsRange(e))return!1;return!0}}class Vp extends Ze{refresh(){const e=this.editor.model,t=e.document,i=Os(t.selection.getSelectedBlocks());Sp(i,e.schema)?this.isEnabled=e.schema.checkAttribute(i,"linkHref"):this.isEnabled=e.schema.checkAttributeInSelection(t.selection,"linkHref")}execute(){const e=this.editor,t=this.editor.model,i=t.document.selection,o=e.commands.get("link");t.change(e=>{const n=i.isCollapsed?[Dm(i.getFirstPosition(),"linkHref",i.getAttribute("linkHref"),t)]:t.schema.getValidRanges(i.getRanges(),"linkHref");for(const t of n)if(e.removeAttribute("linkHref",t),o)for(const i of o.manualDecorators)e.removeAttribute(i.id,t)})}}class zp{constructor({id:e,label:t,attributes:i,defaultValue:o}){this.id=e,this.set("value"),this.defaultValue=o,this.label=t,this.attributes=i}}Ye(zp,qe);i(92);const Op=/^(https?:)?\/\//;class Mp extends Qe{static get pluginName(){return"LinkEditing"}static get requires(){return[Cm,wm,Hf]}constructor(e){super(e),e.config.define("link",{addTargetToExternalLinks:!1})}init(){const e=this.editor;e.model.schema.extend("$text",{allowAttributes:"linkHref"}),e.conversion.for("dataDowncast").attributeToElement({model:"linkHref",view:Ep}),e.conversion.for("editingDowncast").attributeToElement({model:"linkHref",view:(e,t)=>Ep(Pp(e),t)}),e.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:{href:!0}},model:{key:"linkHref",value:e=>e.getAttribute("href")}}),e.commands.add("link",new Ip(e)),e.commands.add("unlink",new Vp(e));const t=function(e,t){const i={"Open in a new tab":e("Open in a new tab"),Downloadable:e("Downloadable")};return t.forEach(e=>(e.label&&i[e.label]&&(e.label=i[e.label]),e)),t}(e.t,function(e){const t=[];if(e)for(const[i,o]of Object.entries(e)){const e=Object.assign({},o,{id:"link"+yp(i)});t.push(e)}return t}(e.config.get("link.decorators")));this._enableAutomaticDecorators(t.filter(e=>"automatic"===e.mode)),this._enableManualDecorators(t.filter(e=>"manual"===e.mode));e.plugins.get(Cm).registerAttribute("linkHref"),Hm(e,"linkHref","a","ck-link_selected"),this._enableInsertContentSelectionAttributesFixer(),this._enableClickingAfterLink(),this._enableTypingOverLink(),this._handleDeleteContentAfterLink()}_enableAutomaticDecorators(e){const t=this.editor,i=t.commands.get("link").automaticDecorators;t.config.get("link.addTargetToExternalLinks")&&i.add({id:"linkIsExternal",mode:"automatic",callback:e=>Op.test(e),attributes:{target:"_blank",rel:"noopener noreferrer"}}),i.add(e),i.length&&t.conversion.for("downcast").add(i.getDispatcher())}_enableManualDecorators(e){if(!e.length)return;const t=this.editor,i=t.commands.get("link").manualDecorators;e.forEach(e=>{t.model.schema.extend("$text",{allowAttributes:e.id}),i.add(new zp(e)),t.conversion.for("downcast").attributeToElement({model:e.id,view:(t,{writer:o})=>{if(t){const t=i.get(e.id).attributes,n=o.createAttributeElement("a",t,{priority:5});return o.setCustomProperty("link",!0,n),n}}}),t.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:i.get(e.id).attributes},model:{key:e.id}})})}_enableInsertContentSelectionAttributesFixer(){const e=this.editor,t=e.model,i=t.document.selection,o=e.commands.get("link");this.listenTo(t,"insertContent",()=>{const e=i.anchor.nodeBefore,n=i.anchor.nodeAfter;i.hasAttribute("linkHref")&&e&&e.hasAttribute("linkHref")&&(n&&n.hasAttribute("linkHref")||t.change(e=>{Np(e,o.manualDecorators)}))},{priority:"low"})}_enableClickingAfterLink(){const e=this.editor,t=e.commands.get("link");e.editing.view.addObserver(Kh);let i=!1;this.listenTo(e.editing.view.document,"mousedown",()=>{i=!0}),this.listenTo(e.editing.view.document,"selectionChange",()=>{if(!i)return;i=!1;const o=e.model.document.selection;if(!o.isCollapsed)return;if(!o.hasAttribute("linkHref"))return;const n=o.getFirstPosition(),r=Dm(n,"linkHref",o.getAttribute("linkHref"),e.model);(n.isTouching(r.start)||n.isTouching(r.end))&&e.model.change(e=>{Np(e,t.manualDecorators)})})}_enableTypingOverLink(){const e=this.editor,t=e.editing.view;let i,o;this.listenTo(t.document,"delete",()=>{o=!0},{priority:"high"}),this.listenTo(e.model,"deleteContent",()=>{const t=e.model.document.selection;t.isCollapsed||(o?o=!1:Bp(e)&&function(e){const t=e.document.selection,i=t.getFirstPosition(),o=t.getLastPosition(),n=i.nodeAfter;if(!n)return!1;if(!n.is("$text"))return!1;if(!n.hasAttribute("linkHref"))return!1;const r=o.textNode||o.nodeBefore;if(n===r)return!0;return Dm(i,"linkHref",n.getAttribute("linkHref"),e).containsRange(e.createRange(i,o),!0)}(e.model)&&(i=t.getAttributes()))},{priority:"high"}),this.listenTo(e.model,"insertContent",(t,[n])=>{o=!1,Bp(e)&&i&&(e.model.change(e=>{for(const[t,o]of i)e.setAttribute(t,o,n)}),i=null)},{priority:"high"})}_handleDeleteContentAfterLink(){const e=this.editor,t=e.model,i=t.document.selection,o=e.editing.view,n=e.commands.get("link");let r=!1,s=!1;this.listenTo(o.document,"delete",(e,t)=>{s=t.domEvent.keyCode===Vn.backspace},{priority:"high"}),this.listenTo(t,"deleteContent",()=>{r=!1;const e=i.getFirstPosition(),o=i.getAttribute("linkHref");if(!o)return;const n=Dm(e,"linkHref",o,t);r=n.containsPosition(e)||n.end.isEqual(e)},{priority:"high"}),this.listenTo(t,"deleteContent",()=>{s&&(s=!1,r||e.model.enqueueChange(e=>{Np(e,n.manualDecorators)}))},{priority:"low"})}}function Np(e,t){e.removeSelectionAttribute("linkHref");for(const i of t)e.removeSelectionAttribute(i.id)}function Bp(e){return e.plugins.get("Input").isInput(e.model.change(e=>e.batch))}i(94);class Fp extends id{constructor(e,t){super(e);const i=e.t;this.focusTracker=new Ms,this.keystrokes=new Ns,this.urlInputView=this._createUrlInput(),this.saveButtonView=this._createButton(i("Save"),Sc,"ck-button-save"),this.saveButtonView.type="submit",this.cancelButtonView=this._createButton(i("Cancel"),Pc,"ck-button-cancel","cancel"),this._manualDecoratorSwitches=this._createManualDecoratorSwitches(t),this.children=this._createFormChildren(t.manualDecorators),this._focusables=new td,this._focusCycler=new Id({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}});const o=["ck","ck-link-form","ck-responsive-form"];t.manualDecorators.length&&o.push("ck-link-form_layout-vertical","ck-vertical-form"),this.setTemplate({tag:"form",attributes:{class:o,tabindex:"-1"},children:this.children}),Zc(this)}getDecoratorSwitchesState(){return Array.from(this._manualDecoratorSwitches).reduce((e,t)=>(e[t.name]=t.isOn,e),{})}render(){super.render(),ed({view:this});[this.urlInputView,...this._manualDecoratorSwitches,this.saveButtonView,this.cancelButtonView].forEach(e=>{this._focusables.add(e),this.focusTracker.add(e.element)}),this.keystrokes.listenTo(this.element)}focus(){this._focusCycler.focusFirst()}_createUrlInput(){const e=this.locale.t,t=new lh(this.locale,ch);return t.label=e("Link URL"),t}_createButton(e,t,i,o){const n=new Ad(this.locale);return n.set({label:e,icon:t,tooltip:!0}),n.extendTemplate({attributes:{class:i}}),o&&n.delegate("execute").to(this,o),n}_createManualDecoratorSwitches(e){const t=this.createCollection();for(const i of e.manualDecorators){const o=new Td(this.locale);o.set({name:i.id,label:i.label,withText:!0}),o.bind("isOn").toMany([i,e],"value",(e,t)=>void 0===t&&void 0===e?i.defaultValue:e),o.on("execute",()=>{i.set("value",!o.isOn)}),t.add(o)}return t}_createFormChildren(e){const t=this.createCollection();if(t.add(this.urlInputView),e.length){const e=new id;e.setTemplate({tag:"ul",children:this._manualDecoratorSwitches.map(e=>({tag:"li",children:[e],attributes:{class:["ck","ck-list__item"]}})),attributes:{class:["ck","ck-reset","ck-list"]}}),t.add(e)}return t.add(this.saveButtonView),t.add(this.cancelButtonView),t}}i(96);class Dp extends id{constructor(e){super(e);const t=e.t;this.focusTracker=new Ms,this.keystrokes=new Ns,this.previewButtonView=this._createPreviewButton(),this.unlinkButtonView=this._createButton(t("Unlink"),'',"unlink"),this.editButtonView=this._createButton(t("Edit link"),Gc,"edit"),this.set("href"),this._focusables=new td,this._focusCycler=new Id({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}}),this.setTemplate({tag:"div",attributes:{class:["ck","ck-link-actions","ck-responsive-form"],tabindex:"-1"},children:[this.previewButtonView,this.editButtonView,this.unlinkButtonView]})}render(){super.render();[this.previewButtonView,this.editButtonView,this.unlinkButtonView].forEach(e=>{this._focusables.add(e),this.focusTracker.add(e.element)}),this.keystrokes.listenTo(this.element)}focus(){this._focusCycler.focusFirst()}_createButton(e,t,i){const o=new Ad(this.locale);return o.set({label:e,icon:t,tooltip:!0}),o.delegate("execute").to(this,i),o}_createPreviewButton(){const e=new Ad(this.locale),t=this.bindTemplate,i=this.t;return e.set({withText:!0,tooltip:i("Open link in new tab")}),e.extendTemplate({attributes:{class:["ck","ck-link-actions__preview"],href:t.to("href",e=>e&&Pp(e)),target:"_blank",rel:"noopener noreferrer"}}),e.bind("label").to(this,"href",e=>e||i("This link has no URL")),e.bind("isEnabled").to(this,"href",e=>!!e),e.template.tag="a",e.template.eventListeners={},e}}class Lp extends Qe{static get requires(){return[_h]}static get pluginName(){return"LinkUI"}init(){const e=this.editor;e.editing.view.addObserver(Uh),this.actionsView=this._createActionsView(),this.formView=this._createFormView(),this._balloon=e.plugins.get(_h),this._createToolbarLinkButton(),this._enableUserBalloonInteractions(),e.conversion.for("editingDowncast").markerToHighlight({model:"link-ui",view:{classes:["ck-fake-link-selection"]}}),e.conversion.for("editingDowncast").markerToElement({model:"link-ui",view:{name:"span",classes:["ck-fake-link-selection","ck-fake-link-selection_collapsed"]}})}destroy(){super.destroy(),this.formView.destroy()}_createActionsView(){const e=this.editor,t=new Dp(e.locale),i=e.commands.get("link"),o=e.commands.get("unlink");return t.bind("href").to(i,"value"),t.editButtonView.bind("isEnabled").to(i),t.unlinkButtonView.bind("isEnabled").to(o),this.listenTo(t,"edit",()=>{this._addFormView()}),this.listenTo(t,"unlink",()=>{e.execute("unlink"),this._hideUI()}),t.keystrokes.set("Esc",(e,t)=>{this._hideUI(),t()}),t.keystrokes.set("Ctrl+K",(e,t)=>{this._addFormView(),t()}),t}_createFormView(){const e=this.editor,t=e.commands.get("link"),i=e.config.get("link.defaultProtocol"),o=new Fp(e.locale,t);return o.urlInputView.fieldView.bind("value").to(t,"value"),o.urlInputView.bind("isReadOnly").to(t,"isEnabled",e=>!e),o.saveButtonView.bind("isEnabled").to(t),this.listenTo(o,"submit",()=>{const{value:t}=o.urlInputView.fieldView.element,n=Rp(t,i);e.execute("link",n,o.getDecoratorSwitchesState()),this._closeFormView()}),this.listenTo(o,"cancel",()=>{this._closeFormView()}),o.keystrokes.set("Esc",(e,t)=>{this._closeFormView(),t()}),o}_createToolbarLinkButton(){const e=this.editor,t=e.commands.get("link"),i=e.t;e.keystrokes.set("Ctrl+K",(e,i)=>{i(),t.isEnabled&&this._showUI(!0)}),e.ui.componentFactory.add("link",e=>{const o=new Ad(e);return o.isEnabled=!0,o.label=i("Link"),o.icon='',o.keystroke="Ctrl+K",o.tooltip=!0,o.isToggleable=!0,o.bind("isEnabled").to(t,"isEnabled"),o.bind("isOn").to(t,"value",e=>!!e),this.listenTo(o,"execute",()=>this._showUI(!0)),o})}_enableUserBalloonInteractions(){const e=this.editor.editing.view.document;this.listenTo(e,"click",()=>{this._getSelectedLinkElement()&&this._showUI()}),this.editor.keystrokes.set("Tab",(e,t)=>{this._areActionsVisible&&!this.actionsView.focusTracker.isFocused&&(this.actionsView.focus(),t())},{priority:"high"}),this.editor.keystrokes.set("Esc",(e,t)=>{this._isUIVisible&&(this._hideUI(),t())}),Xc({emitter:this.formView,activator:()=>this._isUIInPanel,contextElements:[this._balloon.view.element],callback:()=>this._hideUI()})}_addActionsView(){this._areActionsInPanel||this._balloon.add({view:this.actionsView,position:this._getBalloonPositionData()})}_addFormView(){if(this._isFormInPanel)return;const e=this.editor.commands.get("link");this.formView.disableCssTransitions(),this._balloon.add({view:this.formView,position:this._getBalloonPositionData()}),this._balloon.visibleView===this.formView&&this.formView.urlInputView.fieldView.select(),this.formView.enableCssTransitions(),this.formView.urlInputView.fieldView.element.value=e.value||""}_closeFormView(){const e=this.editor.commands.get("link");e.restoreManualDecoratorStates(),void 0!==e.value?this._removeFormView():this._hideUI()}_removeFormView(){this._isFormInPanel&&(this.formView.saveButtonView.focus(),this._balloon.remove(this.formView),this.editor.editing.view.focus(),this._hideFakeVisualSelection())}_showUI(e=!1){this._getSelectedLinkElement()?(this._areActionsVisible?this._addFormView():this._addActionsView(),e&&this._balloon.showStack("main")):(this._showFakeVisualSelection(),this._addActionsView(),e&&this._balloon.showStack("main"),this._addFormView()),this._startUpdatingUI()}_hideUI(){if(!this._isUIInPanel)return;const e=this.editor;this.stopListening(e.ui,"update"),this.stopListening(this._balloon,"change:visibleView"),e.editing.view.focus(),this._removeFormView(),this._balloon.remove(this.actionsView),this._hideFakeVisualSelection()}_startUpdatingUI(){const e=this.editor,t=e.editing.view.document;let i=this._getSelectedLinkElement(),o=r();const n=()=>{const e=this._getSelectedLinkElement(),t=r();i&&!e||!i&&t!==o?this._hideUI():this._isUIVisible&&this._balloon.updatePosition(this._getBalloonPositionData()),i=e,o=t};function r(){return t.selection.focus.getAncestors().reverse().find(e=>e.is("element"))}this.listenTo(e.ui,"update",n),this.listenTo(this._balloon,"change:visibleView",n)}get _isFormInPanel(){return this._balloon.hasView(this.formView)}get _areActionsInPanel(){return this._balloon.hasView(this.actionsView)}get _areActionsVisible(){return this._balloon.visibleView===this.actionsView}get _isUIInPanel(){return this._isFormInPanel||this._areActionsInPanel}get _isUIVisible(){return this._balloon.visibleView==this.formView||this._areActionsVisible}_getBalloonPositionData(){const e=this.editor.editing.view,t=this.editor.model,i=e.document;let o=null;if(t.markers.has("link-ui")){const t=Array.from(this.editor.editing.mapper.markerNameToElements("link-ui")),i=e.createRange(e.createPositionBefore(t[0]),e.createPositionAfter(t[t.length-1]));o=e.domConverter.viewRangeToDom(i)}else{const t=this._getSelectedLinkElement(),n=i.selection.getFirstRange();o=t?e.domConverter.mapViewToDom(t):e.domConverter.viewRangeToDom(n)}return{target:o}}_getSelectedLinkElement(){const e=this.editor.editing.view,t=e.document.selection;if(t.isCollapsed)return Hp(t.getFirstPosition());{const i=t.getFirstRange().getTrimmed(),o=Hp(i.start),n=Hp(i.end);return o&&o==n&&e.createRangeIn(o).getTrimmed().isEqual(i)?o:null}}_showFakeVisualSelection(){const e=this.editor.model;e.change(t=>{const i=e.document.selection.getFirstRange();if(e.markers.has("link-ui"))t.updateMarker("link-ui",{range:i});else if(i.start.isAtEnd){const o=i.start.getLastMatchingPosition(({item:t})=>!e.schema.isContent(t),{boundaries:i});t.addMarker("link-ui",{usingOperation:!1,affectsData:!1,range:t.createRange(o,i.end)})}else t.addMarker("link-ui",{usingOperation:!1,affectsData:!1,range:i})})}_hideFakeVisualSelection(){const e=this.editor.model;e.markers.has("link-ui")&&e.change(e=>{e.removeMarker("link-ui")})}}function Hp(e){return e.getAncestors().find(e=>{return(t=e).is("attributeElement")&&!!t.getCustomProperty("link");var t})}const jp=new RegExp("(^|\\s)(((?:(?:(?:https?|ftp):)?\\/\\/)(?:\\S+(?::\\S*)?@)?(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(((?!www\\.)|(www\\.))(?![-_])(?:[-_a-z0-9\\u00a1-\\uffff]{1,63}\\.)+(?:[a-z\\u00a1-\\uffff]{2,63})))(?::\\d{2,5})?(?:[/?#]\\S*)?)|((www.|(\\S+@))((?![-_])(?:[-_a-z0-9\\u00a1-\\uffff]{1,63}\\.))+(?:[a-z\\u00a1-\\uffff]{2,63})))$","i");class Wp extends Qe{static get pluginName(){return"AutoLink"}init(){const e=this.editor.model.document.selection;e.on("change:range",()=>{this.isEnabled=!e.anchor.parent.is("element","codeBlock")}),this._enableTypingHandling()}afterInit(){this._enableEnterHandling(),this._enableShiftEnterHandling()}_enableTypingHandling(){const e=this.editor,t=new xm(e.model,e=>{if(!function(e){return e.length>4&&" "===e[e.length-1]&&" "!==e[e.length-2]}(e))return;const t=qp(e.substr(0,e.length-1));return t?{url:t}:void 0}),i=e.plugins.get("Input");t.on("matched:data",(t,o)=>{const{batch:n,range:r,url:s}=o;if(!i.isInput(n))return;const a=r.end.getShiftedBy(-1),l=a.getShiftedBy(-s.length),c=e.model.createRange(l,a);this._applyAutoLink(s,c)}),t.bind("isEnabled").to(this)}_enableEnterHandling(){const e=this.editor,t=e.model,i=e.commands.get("enter");i&&i.on("execute",()=>{const e=t.document.selection.getFirstPosition();if(!e.parent.previousSibling)return;const i=t.createRangeIn(e.parent.previousSibling);this._checkAndApplyAutoLinkOnRange(i)})}_enableShiftEnterHandling(){const e=this.editor,t=e.model,i=e.commands.get("shiftEnter");i&&i.on("execute",()=>{const e=t.document.selection.getFirstPosition(),i=t.createRange(t.createPositionAt(e.parent,0),e.getShiftedBy(-1));this._checkAndApplyAutoLinkOnRange(i)})}_checkAndApplyAutoLinkOnRange(e){const t=this.editor.model,{text:i,range:o}=ym(e,t),n=qp(i);if(n){const e=t.createRange(o.end.getShiftedBy(-n.length),o.end);this._applyAutoLink(n,e)}}_applyAutoLink(e,t){const i=this.editor.model;this.isEnabled&&function(e,t){return t.schema.checkAttributeInSelection(t.createSelection(e),"linkHref")}(t,i)&&i.enqueueChange(i=>{const o=this.editor.config.get("link.defaultProtocol"),n=Rp(e,o);i.setAttribute("linkHref",n,t)})}}function qp(e){const t=jp.exec(e);return t?t[2]:null}class $p extends Ze{constructor(e,t){super(e),this.type=t}refresh(){this.value=this._getValue(),this.isEnabled=this._checkEnabled()}execute(e={}){const t=this.editor.model,i=t.document,o=Array.from(i.selection.getSelectedBlocks()).filter(e=>Kp(e,t.schema)),n=void 0!==e.forceValue?!e.forceValue:this.value;t.change(e=>{if(n){let t=o[o.length-1].nextSibling,i=Number.POSITIVE_INFINITY,n=[];for(;t&&"listItem"==t.name&&0!==t.getAttribute("listIndent");){const e=t.getAttribute("listIndent");e=i;)r>n.getAttribute("listIndent")&&(r=n.getAttribute("listIndent")),n.getAttribute("listIndent")==r&&e[t?"unshift":"push"](n),n=n[t?"previousSibling":"nextSibling"]}}function Kp(e,t){return t.checkChild(e.parent,"listItem")&&!t.isObject(e)}class Gp extends Ze{constructor(e,t){super(e),this._indentBy="forward"==t?1:-1}refresh(){this.isEnabled=this._checkEnabled()}execute(){const e=this.editor.model,t=e.document;let i=Array.from(t.selection.getSelectedBlocks());e.change(e=>{const t=i[i.length-1];let o=t.nextSibling;for(;o&&"listItem"==o.name&&o.getAttribute("listIndent")>t.getAttribute("listIndent");)i.push(o),o=o.nextSibling;this._indentBy<0&&(i=i.reverse());for(const t of i){const i=t.getAttribute("listIndent")+this._indentBy;i<0?e.rename(t,"paragraph"):e.setAttribute("listIndent",i,t)}this.fire("_executeCleanup",i)})}_checkEnabled(){const e=Os(this.editor.model.document.selection.getSelectedBlocks());if(!e||!e.is("element","listItem"))return!1;if(this._indentBy>0){const t=e.getAttribute("listIndent"),i=e.getAttribute("listType");let o=e.previousSibling;for(;o&&o.is("element","listItem")&&o.getAttribute("listIndent")>=t;){if(o.getAttribute("listIndent")==t)return o.getAttribute("listType")==i;o=o.previousSibling}return!1}return!0}}function Jp(e,t){const i=t.mapper,o=t.writer,n="numbered"==e.getAttribute("listType")?"ol":"ul",r=function(e){const t=e.createContainerElement("li");return t.getFillerOffset=ob,t}(o),s=o.createContainerElement(n,null);return o.insert(o.createPositionAt(s,0),r),i.bindElements(e,r),r}function Yp(e,t,i,o){const n=t.parent,r=i.mapper,s=i.writer;let a=r.toViewPosition(o.createPositionBefore(e));const l=Zp(e.previousSibling,{sameIndent:!0,smallerIndent:!0,listIndent:e.getAttribute("listIndent")}),c=e.previousSibling;if(l&&l.getAttribute("listIndent")==e.getAttribute("listIndent")){const e=r.toViewElement(l);a=s.breakContainer(s.createPositionAfter(e))}else if(c&&"listItem"==c.name){a=r.toViewPosition(o.createPositionAt(c,"end"));const e=r.findMappedViewAncestor(a),t=tb(e);a=t?s.createPositionBefore(t):s.createPositionAt(e,"end")}else a=r.toViewPosition(o.createPositionBefore(e));if(a=Xp(a),s.insert(a,n),c&&"listItem"==c.name){const e=r.toViewElement(c),i=s.createRange(s.createPositionAt(e,0),a).getWalker({ignoreElementEnd:!0});for(const e of i)if(e.item.is("element","li")){const o=s.breakContainer(s.createPositionBefore(e.item)),n=e.item.parent,r=s.createPositionAt(t,"end");Qp(s,r.nodeBefore,r.nodeAfter),s.move(s.createRangeOn(n),r),i.position=o}}else{const i=n.nextSibling;if(i&&(i.is("element","ul")||i.is("element","ol"))){let o=null;for(const t of i.getChildren()){const i=r.toModelElement(t);if(!(i&&i.getAttribute("listIndent")>e.getAttribute("listIndent")))break;o=t}o&&(s.breakContainer(s.createPositionAfter(o)),s.move(s.createRangeOn(o.parent),s.createPositionAt(t,"end")))}}Qp(s,n,n.nextSibling),Qp(s,n.previousSibling,n)}function Qp(e,t,i){return!t||!i||"ul"!=t.name&&"ol"!=t.name||t.name!=i.name||t.getAttribute("class")!==i.getAttribute("class")?null:e.mergeContainers(e.createPositionAfter(t))}function Xp(e){return e.getLastMatchingPosition(e=>e.item.is("uiElement"))}function Zp(e,t){const i=!!t.sameIndent,o=!!t.smallerIndent,n=t.listIndent;let r=e;for(;r&&"listItem"==r.name;){const e=r.getAttribute("listIndent");if(i&&n==e||o&&n>e)return r;r="forward"===t.direction?r.nextSibling:r.previousSibling}return null}function eb(e,t,i,o){e.ui.componentFactory.add(t,n=>{const r=e.commands.get(t),s=new Ad(n);return s.set({label:i,icon:o,tooltip:!0,isToggleable:!0}),s.bind("isOn","isEnabled").to(r,"value","isEnabled"),s.on("execute",()=>{e.execute(t),e.editing.view.focus()}),s})}function tb(e){for(const t of e.getChildren())if("ul"==t.name||"ol"==t.name)return t;return null}function ib(e,t){const i=[],o=e.parent,n={ignoreElementEnd:!0,startPosition:e,shallow:!0,direction:t},r=o.getAttribute("listIndent"),s=[...new ea(n)].filter(e=>e.item.is("element")).map(e=>e.item);for(const e of s){if(!e.is("element","listItem"))break;if(e.getAttribute("listIndent")r)){if(e.getAttribute("listType")!==o.getAttribute("listType"))break;if(e.getAttribute("listStyle")!==o.getAttribute("listStyle"))break;"backward"===t?i.unshift(e):i.push(e)}}return i}function ob(){const e=!this.isEmpty&&("ul"==this.getChild(0).name||"ol"==this.getChild(0).name);return this.isEmpty||e?0:nn.call(this)}function nb(e){return(t,i,o)=>{const n=o.consumable;if(!n.test(i.item,"insert")||!n.test(i.item,"attribute:listType")||!n.test(i.item,"attribute:listIndent"))return;n.consume(i.item,"insert"),n.consume(i.item,"attribute:listType"),n.consume(i.item,"attribute:listIndent");const r=i.item;Yp(r,Jp(r,o),o,e)}}function rb(e,t,i){if(!i.consumable.consume(t.item,"attribute:listType"))return;const o=i.mapper.toViewElement(t.item),n=i.writer;n.breakContainer(n.createPositionBefore(o)),n.breakContainer(n.createPositionAfter(o));const r=o.parent,s="numbered"==t.attributeNewValue?"ol":"ul";n.rename(s,r)}function sb(e,t,i){const o=i.mapper.toViewElement(t.item).parent,n=i.writer;Qp(n,o,o.nextSibling),Qp(n,o.previousSibling,o);for(const e of t.item.getChildren())i.consumable.consume(e,"insert")}function ab(e,t,i){if("listItem"!=t.item.name){let e=i.mapper.toViewPosition(t.range.start);const o=i.writer,n=[];for(;("ul"==e.parent.name||"ol"==e.parent.name)&&(e=o.breakContainer(e),"li"==e.parent.name);){const t=e,i=o.createPositionAt(e.parent,"end");if(!t.isEqual(i)){const e=o.remove(o.createRange(t,i));n.push(e)}e=o.createPositionAfter(e.parent)}if(n.length>0){for(let t=0;t0){const t=Qp(o,i,i.nextSibling);t&&t.parent==i&&e.offset--}}Qp(o,e.nodeBefore,e.nodeAfter)}}}function lb(e,t,i){const o=i.mapper.toViewPosition(t.position),n=o.nodeBefore,r=o.nodeAfter;Qp(i.writer,n,r)}function cb(e,t,i){if(i.consumable.consume(t.viewItem,{name:!0})){const e=i.writer,o=e.createElement("listItem"),n=function(e){let t=0,i=e.parent;for(;i;){if(i.is("element","li"))t++;else{const e=i.previousSibling;e&&e.is("element","li")&&t++}i=i.parent}return t}(t.viewItem);e.setAttribute("listIndent",n,o);const r=t.viewItem.parent&&"ol"==t.viewItem.parent.name?"numbered":"bulleted";if(e.setAttribute("listType",r,o),!i.safeInsert(o,t.modelCursor))return;const s=function(e,t,i){const{writer:o,schema:n}=i;let r=o.createPositionAfter(e);for(const s of t)if("ul"==s.name||"ol"==s.name)r=i.convertItem(s,r).modelCursor;else{const t=i.convertItem(s,o.createPositionAt(e,"end")),a=t.modelRange.start.nodeAfter;a&&a.is("element")&&!n.checkChild(e,a.name)&&(e=t.modelCursor.parent.is("element","listItem")?t.modelCursor.parent:gb(t.modelCursor),r=o.createPositionAfter(e))}return r}(o,t.viewItem.getChildren(),i);t.modelRange=e.createRange(t.modelCursor,s),i.updateConversionResult(o,t)}}function db(e,t,i){if(i.consumable.test(t.viewItem,{name:!0})){const e=Array.from(t.viewItem.getChildren());for(const t of e){!(t.is("element","li")||pb(t))&&t._remove()}}}function hb(e,t,i){if(i.consumable.test(t.viewItem,{name:!0})){if(0===t.viewItem.childCount)return;const e=[...t.viewItem.getChildren()];let i=!1,o=!0;for(const t of e)i&&!pb(t)&&t._remove(),t.is("$text")?(o&&(t._data=t.data.trimStart()),t.nextSibling&&!pb(t.nextSibling)||(t._data=t.data.trimEnd())):pb(t)&&(i=!0),o=!1}}function ub(e){return(t,i)=>{if(i.isPhantom)return;const o=i.modelPosition.nodeBefore;if(o&&o.is("element","listItem")){const t=i.mapper.toViewElement(o),n=t.getAncestors().find(pb),r=e.createPositionAt(t,0).getWalker();for(const e of r){if("elementStart"==e.type&&e.item.is("element","li")){i.viewPosition=e.previousPosition;break}if("elementEnd"==e.type&&e.item==n){i.viewPosition=e.nextPosition;break}}}}}function mb(e,[t,i]){let o,n=t.is("documentFragment")?t.getChild(0):t;if(o=i?this.createSelection(i):this.document.selection,n&&n.is("element","listItem")){const e=o.getFirstPosition();let t=null;if(e.parent.is("element","listItem")?t=e.parent:e.nodeBefore&&e.nodeBefore.is("element","listItem")&&(t=e.nodeBefore),t){const e=t.getAttribute("listIndent");if(e>0)for(;n&&n.is("element","listItem");)n._setAttribute("listIndent",n.getAttribute("listIndent")+e),n=n.nextSibling}}}function gb(e){const t=new ea({startPosition:e});let i;do{i=t.next()}while(!i.value.item.is("element","listItem"));return i.value.item}function fb(e,t,i,o,n,r){const s=Zp(t.nodeBefore,{sameIndent:!0,smallerIndent:!0,listIndent:e,foo:"b"}),a=n.mapper,l=n.writer,c=s?s.getAttribute("listIndent"):null;let d;if(s)if(c==e){const e=a.toViewElement(s).parent;d=l.createPositionAfter(e)}else{const e=r.createPositionAt(s,"end");d=a.toViewPosition(e)}else d=i;d=Xp(d);for(const e of[...o.getChildren()])pb(e)&&(d=l.move(l.createRangeOn(e),d).end,Qp(l,e,e.nextSibling),Qp(l,e.previousSibling,e))}function pb(e){return e.is("element","ol")||e.is("element","ul")}class bb extends Qe{static get pluginName(){return"ListEditing"}static get requires(){return[Jm,vm]}init(){const e=this.editor;e.model.schema.register("listItem",{inheritAllFrom:"$block",allowAttributes:["listType","listIndent"]});const t=e.data,i=e.editing;var o;e.model.document.registerPostFixer(t=>function(e,t){const i=e.document.differ.getChanges(),o=new Map;let n=!1;for(const o of i)if("insert"==o.type&&"listItem"==o.name)r(o.position);else if("insert"==o.type&&"listItem"!=o.name){if("$text"!=o.name){const i=o.position.nodeAfter;i.hasAttribute("listIndent")&&(t.removeAttribute("listIndent",i),n=!0),i.hasAttribute("listType")&&(t.removeAttribute("listType",i),n=!0),i.hasAttribute("listStyle")&&(t.removeAttribute("listStyle",i),n=!0);for(const t of Array.from(e.createRangeIn(i)).filter(e=>e.item.is("element","listItem")))r(t.previousPosition)}r(o.position.getShiftedBy(o.length))}else"remove"==o.type&&"listItem"==o.name?r(o.position):("attribute"==o.type&&"listIndent"==o.attributeKey||"attribute"==o.type&&"listType"==o.attributeKey)&&r(o.range.start);for(const e of o.values())s(e),a(e);return n;function r(e){const t=e.nodeBefore;if(t&&t.is("element","listItem")){let e=t;if(o.has(e))return;for(let t=e.previousSibling;t&&t.is("element","listItem");t=e.previousSibling)if(e=t,o.has(e))return;o.set(t,e)}else{const t=e.nodeAfter;t&&t.is("element","listItem")&&o.set(t,t)}}function s(e){let i=0,o=null;for(;e&&e.is("element","listItem");){const r=e.getAttribute("listIndent");if(r>i){let s;null===o?(o=r-i,s=i):(o>r&&(o=r),s=r-o),t.setAttribute("listIndent",s,e),n=!0}else o=null,i=e.getAttribute("listIndent")+1;e=e.nextSibling}}function a(e){let i=[],o=null;for(;e&&e.is("element","listItem");){const r=e.getAttribute("listIndent");if(o&&o.getAttribute("listIndent")>r&&(i=i.slice(0,r+1)),0!=r)if(i[r]){const o=i[r];e.getAttribute("listType")!=o&&(t.setAttribute("listType",o,e),n=!0)}else i[r]=e.getAttribute("listType");o=e,e=e.nextSibling}}}(e.model,t)),i.mapper.registerViewToModelLength("li",wb),t.mapper.registerViewToModelLength("li",wb),i.mapper.on("modelToViewPosition",ub(i.view)),i.mapper.on("viewToModelPosition",(o=e.model,(e,t)=>{const i=t.viewPosition,n=i.parent,r=t.mapper;if("ul"==n.name||"ol"==n.name){if(i.isAtEnd){const e=r.toModelElement(i.nodeBefore),n=r.getModelLength(i.nodeBefore);t.modelPosition=o.createPositionBefore(e).getShiftedBy(n)}else{const e=r.toModelElement(i.nodeAfter);t.modelPosition=o.createPositionBefore(e)}e.stop()}else if("li"==n.name&&i.nodeBefore&&("ul"==i.nodeBefore.name||"ol"==i.nodeBefore.name)){const s=r.toModelElement(n);let a=1,l=i.nodeBefore;for(;l&&pb(l);)a+=r.getModelLength(l),l=l.previousSibling;t.modelPosition=o.createPositionBefore(s).getShiftedBy(a),e.stop()}})),t.mapper.on("modelToViewPosition",ub(i.view)),e.conversion.for("editingDowncast").add(t=>{t.on("insert",ab,{priority:"high"}),t.on("insert:listItem",nb(e.model)),t.on("attribute:listType:listItem",rb,{priority:"high"}),t.on("attribute:listType:listItem",sb,{priority:"low"}),t.on("attribute:listIndent:listItem",function(e){return(t,i,o)=>{if(!o.consumable.consume(i.item,"attribute:listIndent"))return;const n=o.mapper.toViewElement(i.item),r=o.writer;r.breakContainer(r.createPositionBefore(n)),r.breakContainer(r.createPositionAfter(n));const s=n.parent,a=s.previousSibling,l=r.createRangeOn(s);r.remove(l),a&&a.nextSibling&&Qp(r,a,a.nextSibling),fb(i.attributeOldValue+1,i.range.start,l.start,n,o,e),Yp(i.item,n,o,e);for(const e of i.item.getChildren())o.consumable.consume(e,"insert")}}(e.model)),t.on("remove:listItem",function(e){return(t,i,o)=>{const n=o.mapper.toViewPosition(i.position).getLastMatchingPosition(e=>!e.item.is("element","li")).nodeAfter,r=o.writer;r.breakContainer(r.createPositionBefore(n)),r.breakContainer(r.createPositionAfter(n));const s=n.parent,a=s.previousSibling,l=r.createRangeOn(s),c=r.remove(l);a&&a.nextSibling&&Qp(r,a,a.nextSibling);fb(o.mapper.toModelElement(n).getAttribute("listIndent")+1,i.position,l.start,n,o,e);for(const e of r.createRangeIn(c).getItems())o.mapper.unbindViewElement(e);t.stop()}}(e.model)),t.on("remove",lb,{priority:"low"})}),e.conversion.for("dataDowncast").add(t=>{t.on("insert",ab,{priority:"high"}),t.on("insert:listItem",nb(e.model))}),e.conversion.for("upcast").add(e=>{e.on("element:ul",db,{priority:"high"}),e.on("element:ol",db,{priority:"high"}),e.on("element:li",hb,{priority:"high"}),e.on("element:li",cb)}),e.model.on("insertContent",mb,{priority:"high"}),e.commands.add("numberedList",new $p(e,"numbered")),e.commands.add("bulletedList",new $p(e,"bulleted")),e.commands.add("indentList",new Gp(e,"forward")),e.commands.add("outdentList",new Gp(e,"backward"));const n=i.view.document;this.listenTo(n,"enter",(e,t)=>{const i=this.editor.model.document,o=i.selection.getLastPosition().parent;i.selection.isCollapsed&&"listItem"==o.name&&o.isEmpty&&(this.editor.execute("outdentList"),t.preventDefault(),e.stop())},{context:"li"}),this.listenTo(n,"delete",(e,t)=>{if("backward"!==t.direction)return;const i=this.editor.model.document.selection;if(!i.isCollapsed)return;const o=i.getFirstPosition();if(!o.isAtStart)return;const n=o.parent;if("listItem"!==n.name)return;n.previousSibling&&"listItem"===n.previousSibling.name||(this.editor.execute("outdentList"),t.preventDefault(),e.stop())},{context:"li"});const r=e=>(t,i)=>{this.editor.commands.get(e).isEnabled&&(this.editor.execute(e),i())};e.keystrokes.set("Tab",r("indentList")),e.keystrokes.set("Shift+Tab",r("outdentList"))}afterInit(){const e=this.editor.commands,t=e.get("indent"),i=e.get("outdent");t&&t.registerChildCommand(e.get("indentList")),i&&i.registerChildCommand(e.get("outdentList"))}}function wb(e){let t=1;for(const i of e.getChildren())if("ul"==i.name||"ol"==i.name)for(const e of i.getChildren())t+=wb(e);return t}var kb='',_b='';class vb extends Qe{static get pluginName(){return"ListUI"}init(){const e=this.editor.t;eb(this.editor,"numberedList",e("Numbered List"),kb),eb(this.editor,"bulletedList",e("Bulleted List"),_b)}}class yb extends Ze{constructor(e,t){super(e),this._defaultType=t}refresh(){this.value=this._getValue(),this.isEnabled=this._checkEnabled()}execute(e={}){const t=this.editor.model;let i=[...t.document.selection.getSelectedBlocks()].filter(e=>e.is("element","listItem")).map(e=>{const i=t.change(t=>t.createPositionAt(e,0));return[...ib(i,"backward"),...ib(i,"forward")]}).flat();i=[...new Set(i)],i.length&&t.change(t=>{for(const o of i)t.setAttribute("listStyle",e.type||this._defaultType,o)})}_getValue(){const e=this.editor.model.document.selection.getFirstPosition().parent;return e&&e.is("element","listItem")?e.getAttribute("listStyle"):null}_checkEnabled(){const e=this.editor,t=e.commands.get("numberedList"),i=e.commands.get("bulletedList");return t.isEnabled||i.isEnabled}}class xb extends Qe{static get requires(){return[bb]}static get pluginName(){return"ListStyleEditing"}init(){const e=this.editor,t=e.model;t.schema.extend("listItem",{allowAttributes:["listStyle"]}),e.commands.add("listStyle",new yb(e,"default")),this.listenTo(e.commands.get("indentList"),"_executeCleanup",function(e){return(t,i)=>{let o;const n=i[0],r=n.getAttribute("listIndent"),s=i.filter(e=>e.getAttribute("listIndent")===r);if(n.previousSibling.getAttribute("listIndent")+1===r)o="default";else{const e=Zp(n.previousSibling,{sameIndent:!0,direction:"backward",listIndent:r});o=e.getAttribute("listStyle")}e.model.change(e=>{for(const t of s)e.setAttribute("listStyle",o,t)})}}(e)),this.listenTo(e.commands.get("outdentList"),"_executeCleanup",function(e){return(t,i)=>{if(!(i=i.reverse().filter(e=>e.is("element","listItem"))).length)return;const o=i[0].getAttribute("listIndent"),n=i[0].getAttribute("listType");let r=i[0].previousSibling;if(r.is("element","listItem"))for(;r.getAttribute("listIndent")!==o;)r=r.previousSibling;else r=null;r||(r=i[i.length-1].nextSibling),r&&r.is("element","listItem")&&r.getAttribute("listType")===n&&e.model.change(e=>{const t=i.filter(e=>e.getAttribute("listIndent")===o);for(const i of t)e.setAttribute("listStyle",r.getAttribute("listStyle"),i)})}}(e)),this.listenTo(e.commands.get("bulletedList"),"_executeCleanup",Tb(e)),this.listenTo(e.commands.get("numberedList"),"_executeCleanup",Tb(e)),t.document.registerPostFixer(function(e){return t=>{let i=!1;const o=Eb(e.model.document.differ.getChanges()).filter(e=>"todo"!==e.getAttribute("listType"));if(!o.length)return i;let n=o[o.length-1].nextSibling;if((!n||!n.is("element","listItem"))&&(n=o[o.length-1].previousSibling,n)){const e=o[0].getAttribute("listIndent");for(;n.is("element","listItem")&&n.getAttribute("listIndent")!==e&&(n=n.previousSibling,n););}for(const e of o)if(e.hasAttribute("listStyle")){const o=e.previousSibling;Ab(o,e)&&(t.setAttribute("listStyle",o.getAttribute("listStyle"),e),i=!0)}else Cb(n,e)?t.setAttribute("listStyle",n.getAttribute("listStyle"),e):t.setAttribute("listStyle","default",e),i=!0;return i}}(e)),e.conversion.for("upcast").add(e=>{e.on("element:li",(e,t,i)=>{const o=t.viewItem.parent.getStyle("list-style-type")||"default",n=t.modelRange.start.nodeAfter||t.modelRange.end.nodeBefore;i.writer.setAttribute("listStyle",o,n)},{priority:"low"})}),e.conversion.for("downcast").add(e=>{e.on("attribute:listStyle:listItem",(e,t,i)=>{const o=i.writer,n=t.item,r=Zp(n.previousSibling,{sameIndent:!0,listIndent:n.getAttribute("listIndent"),direction:"backward"}),s=i.mapper.toViewElement(n);var a,l,c,d,h;a=n,(l=r)&&a.getAttribute("listType")===l.getAttribute("listType")&&a.getAttribute("listIndent")===l.getAttribute("listIndent")&&a.getAttribute("listStyle")===l.getAttribute("listStyle")||o.breakContainer(o.createPositionBefore(s)),c=o,d=t.attributeNewValue,h=s.parent,d&&"default"!==d?c.setStyle("list-style-type",d,h):c.removeStyle("list-style-type",h)},{priority:"low"})}),this._mergeListStyleAttributeWhileMergingLists()}afterInit(){const e=this.editor;e.commands.get("todoList")&&e.model.document.registerPostFixer(function(e){return t=>{const i=Eb(e.model.document.differ.getChanges()).filter(e=>"todo"===e.getAttribute("listType")&&e.hasAttribute("listStyle"));if(!i.length)return!1;for(const e of i)t.removeAttribute("listStyle",e);return!0}}(e))}_mergeListStyleAttributeWhileMergingLists(){const e=this.editor.model;let t;this.listenTo(e,"deleteContent",(e,[i])=>{const o=i.getFirstPosition(),n=i.getLastPosition();if(o.parent===n.parent)return;if(!o.parent.is("element","listItem"))return;const r=n.parent.nextSibling;if(!r||!r.is("element","listItem"))return;const s=Zp(o.parent,{sameIndent:!0,listIndent:r.getAttribute("listIndent")});s&&s.getAttribute("listType")===r.getAttribute("listType")&&(t=s)},{priority:"high"}),this.listenTo(e,"deleteContent",()=>{t&&(e.change(e=>{const i=Zp(t.nextSibling,{sameIndent:!0,listIndent:t.getAttribute("listIndent"),direction:"forward"}),o=[i,...ib(e.createPositionAt(i,0),"forward")];for(const i of o)e.setAttribute("listStyle",t.getAttribute("listStyle"),i)}),t=null)},{priority:"low"})}}function Cb(e,t){if(!e)return!1;const i=e.getAttribute("listStyle");return!!i&&("default"!==i&&e.getAttribute("listType")===t.getAttribute("listType"))}function Ab(e,t){if(!e||!e.is("element","listItem"))return!1;if(t.getAttribute("listType")!==e.getAttribute("listType"))return!1;const i=e.getAttribute("listIndent");if(i<1||i!==t.getAttribute("listIndent"))return!1;const o=e.getAttribute("listStyle");return!(!o||o===t.getAttribute("listStyle"))}function Tb(e){return(t,i)=>{i=i.filter(e=>e.is("element","listItem")),e.model.change(e=>{for(const t of i)e.removeAttribute("listStyle",t)})}}function Eb(e){const t=[];for(const i of e){const e=Pb(i);e&&e.is("element","listItem")&&t.push(e)}return t}function Pb(e){return"attribute"===e.type?e.range.start.nodeAfter:"insert"===e.type?e.position.nodeAfter:null}i(98);class Sb extends Qe{static get pluginName(){return"ListStyleUI"}init(){const e=this.editor,t=e.locale.t;e.ui.componentFactory.add("bulletedList",Rb({editor:e,parentCommandName:"bulletedList",buttonLabel:t("Bulleted List"),buttonIcon:_b,toolbarAriaLabel:t("Bulleted list styles toolbar"),styleDefinitions:[{label:t("Toggle the disc list style"),tooltip:t("Disc"),type:"disc",icon:''},{label:t("Toggle the circle list style"),tooltip:t("Circle"),type:"circle",icon:''},{label:t("Toggle the square list style"),tooltip:t("Square"),type:"square",icon:''}]})),e.ui.componentFactory.add("numberedList",Rb({editor:e,parentCommandName:"numberedList",buttonLabel:t("Numbered List"),buttonIcon:kb,toolbarAriaLabel:t("Numbered list styles toolbar"),styleDefinitions:[{label:t("Toggle the decimal list style"),tooltip:t("Decimal"),type:"decimal",icon:''},{label:t("Toggle the decimal with leading zero list style"),tooltip:t("Decimal with leading zero"),type:"decimal-leading-zero",icon:''},{label:t("Toggle the lower–roman list style"),tooltip:t("Lower–roman"),type:"lower-roman",icon:''},{label:t("Toggle the upper–roman list style"),tooltip:t("Upper-roman"),type:"upper-roman",icon:''},{label:t("Toggle the lower–latin list style"),tooltip:t("Lower-latin"),type:"lower-latin",icon:''},{label:t("Toggle the upper–latin list style"),tooltip:t("Upper-latin"),type:"upper-latin",icon:''}]}))}}function Rb({editor:e,parentCommandName:t,buttonLabel:i,buttonIcon:o,toolbarAriaLabel:n,styleDefinitions:r}){const s=e.commands.get(t),a=e.commands.get("listStyle");return l=>{const c=Zd(l,Nd),d=c.buttonView,h=function({editor:e,listStyleCommand:t,parentCommandName:i}){const o=e.locale,n=e.commands.get(i);return({label:r,type:s,icon:a,tooltip:l})=>{const c=new Ad(o);return c.set({label:r,icon:a,tooltip:l}),t.on("change:value",()=>{c.isOn=t.value===s}),c.on("execute",()=>{n.value?t.value!==s?e.execute("listStyle",{type:s}):e.execute("listStyle",{type:t._defaultType}):e.model.change(()=>{e.execute(i),e.execute("listStyle",{type:s})}),e.editing.view.focus()}),c}}({editor:e,parentCommandName:t,listStyleCommand:a});return eh(c,r.map(h)),c.bind("isEnabled").to(s),c.toolbarView.ariaLabel=n,c.class="ck-list-styles-dropdown",d.on("execute",()=>{e.execute(t),e.editing.view.focus()}),d.set({label:i,icon:o,tooltip:!0,isToggleable:!0}),d.bind("isOn").to(s,"value",e=>!!e),c}}class Ib extends Ze{constructor(e){super(e),this._selectedElements=[],this.on("execute",()=>{this.refresh()},{priority:"highest"})}refresh(){this._selectedElements=this._getSelectedItems(),this.value=this._selectedElements.every(e=>!!e.getAttribute("todoListChecked")),this.isEnabled=!!this._selectedElements.length}_getSelectedItems(){const e=this.editor.model,t=e.schema,i=e.document.selection.getFirstRange(),o=i.start.parent,n=[];t.checkAttribute(o,"todoListChecked")&&n.push(o);for(const e of i.getItems())t.checkAttribute(e,"todoListChecked")&&!n.includes(e)&&n.push(e);return n}execute(e={}){this.editor.model.change(t=>{for(const i of this._selectedElements){(void 0===e.forceValue?!this.value:e.forceValue)?t.setAttribute("todoListChecked",!0,i):t.removeAttribute("todoListChecked",i)}})}}function Vb(e,t,i){const o=t.modelCursor,n=o.parent,r=t.viewItem;if("checkbox"!=r.getAttribute("type")||"listItem"!=n.name||!o.isAtStart)return;if(!i.consumable.consume(r,{name:!0}))return;const s=i.writer;s.setAttribute("listType","todo",n),t.viewItem.hasAttribute("checked")&&s.setAttribute("todoListChecked",!0,n),t.modelRange=s.createRange(o)}function zb(e){return(t,i)=>{const o=i.modelPosition,n=o.parent;if(!n.is("element","listItem")||"todo"!=n.getAttribute("listType"))return;const r=Mb(i.mapper.toViewElement(n),e);r&&(i.viewPosition=i.mapper.findPositionIn(r,o.offset))}}function Ob(e,t,i,o){return t.createUIElement("label",{class:"todo-list__label",contenteditable:!1},(function(t){const n=xs(document,"input",{type:"checkbox"});i&&n.setAttribute("checked","checked"),n.addEventListener("change",()=>o(e));const r=this.toDomElement(t);return r.appendChild(n),r}))}function Mb(e,t){const i=t.createRangeIn(e);for(const e of i)if(e.item.is("containerElement","span")&&e.item.hasClass("todo-list__label__description"))return e.item}const Nb=Mn("Ctrl+Enter");class Bb extends Qe{static get pluginName(){return"TodoListEditing"}static get requires(){return[bb]}init(){const e=this.editor,{editing:t,data:i,model:o}=e;o.schema.extend("listItem",{allowAttributes:["todoListChecked"]}),o.schema.addAttributeCheck((e,t)=>{const i=e.last;if("todoListChecked"==t&&"listItem"==i.name&&"todo"!=i.getAttribute("listType"))return!1}),e.commands.add("todoList",new $p(e,"todo"));const n=new Ib(e);var r,s;e.commands.add("checkTodoList",n),e.commands.add("todoListCheck",n),i.downcastDispatcher.on("insert:listItem",function(e){return(t,i,o)=>{const n=o.consumable;if(!n.test(i.item,"insert")||!n.test(i.item,"attribute:listType")||!n.test(i.item,"attribute:listIndent"))return;if("todo"!=i.item.getAttribute("listType"))return;const r=i.item;n.consume(r,"insert"),n.consume(r,"attribute:listType"),n.consume(r,"attribute:listIndent"),n.consume(r,"attribute:todoListChecked");const s=o.writer,a=Jp(r,o);s.addClass("todo-list",a.parent);const l=s.createContainerElement("label",{class:"todo-list__label"}),c=s.createEmptyElement("input",{type:"checkbox",disabled:"disabled"}),d=s.createContainerElement("span",{class:"todo-list__label__description"});r.getAttribute("todoListChecked")&&s.setAttribute("checked","checked",c),s.insert(s.createPositionAt(a,0),l),s.insert(s.createPositionAt(l,0),c),s.insert(s.createPositionAfter(c),d),Yp(r,a,o,e)}}(o),{priority:"high"}),i.upcastDispatcher.on("element:input",Vb,{priority:"high"}),t.downcastDispatcher.on("insert:listItem",function(e,t){return(i,o,n)=>{const r=n.consumable;if(!r.test(o.item,"insert")||!r.test(o.item,"attribute:listType")||!r.test(o.item,"attribute:listIndent"))return;if("todo"!=o.item.getAttribute("listType"))return;const s=o.item;r.consume(s,"insert"),r.consume(s,"attribute:listType"),r.consume(s,"attribute:listIndent"),r.consume(s,"attribute:todoListChecked");const a=n.writer,l=Jp(s,n),c=!!s.getAttribute("todoListChecked"),d=Ob(s,a,c,t),h=a.createContainerElement("span",{class:"todo-list__label__description"});a.addClass("todo-list",l.parent),a.insert(a.createPositionAt(l,0),d),a.insert(a.createPositionAfter(d),h),Yp(s,l,n,e)}}(o,e=>this._handleCheckmarkChange(e)),{priority:"high"}),t.downcastDispatcher.on("attribute:listType:listItem",(r=e=>this._handleCheckmarkChange(e),s=t.view,(e,t,i)=>{const o=i.mapper.toViewElement(t.item),n=i.writer,a=function(e,t){const i=t.createRangeIn(e);for(const e of i)if(e.item.is("uiElement","label"))return e.item}(o,s);if("todo"==t.attributeNewValue){const e=!!t.item.getAttribute("todoListChecked"),i=Ob(t.item,n,e,r),s=n.createContainerElement("span",{class:"todo-list__label__description"}),a=n.createRangeIn(o),l=tb(o),c=Xp(a.start),d=l?n.createPositionBefore(l):a.end,h=n.createRange(c,d);n.addClass("todo-list",o.parent),n.move(h,n.createPositionAt(s,0)),n.insert(n.createPositionAt(o,0),i),n.insert(n.createPositionAfter(i),s)}else if("todo"==t.attributeOldValue){const e=Mb(o,s);n.removeClass("todo-list",o.parent),n.remove(a),n.move(n.createRangeIn(e),n.createPositionBefore(e)),n.remove(e)}})),t.downcastDispatcher.on("attribute:todoListChecked:listItem",function(e){return(t,i,o)=>{if("todo"!=i.item.getAttribute("listType"))return;if(!o.consumable.consume(i.item,"attribute:todoListChecked"))return;const{mapper:n,writer:r}=o,s=!!i.item.getAttribute("todoListChecked"),a=n.toViewElement(i.item).getChild(0),l=Ob(i.item,r,s,e);r.insert(r.createPositionAfter(a),l),r.remove(a)}}(e=>this._handleCheckmarkChange(e))),t.mapper.on("modelToViewPosition",zb(t.view)),i.mapper.on("modelToViewPosition",zb(t.view)),this.listenTo(t.view.document,"arrowKey",function(e,t){return(i,o)=>{if("left"!=Bn(o.keyCode,t.contentLanguageDirection))return;const n=e.schema,r=e.document.selection;if(!r.isCollapsed)return;const s=r.getFirstPosition(),a=s.parent;if("listItem"===a.name&&"todo"==a.getAttribute("listType")&&s.isAtStart){const t=n.getNearestSelectionRange(e.createPositionBefore(a),"backward");t&&e.change(e=>e.setSelection(t)),o.preventDefault(),o.stopPropagation(),i.stop()}}}(o,e.locale),{context:"li"}),this.listenTo(t.view.document,"keydown",(t,i)=>{On(i)===Nb&&(e.execute("checkTodoList"),t.stop())},{priority:"high"});const a=new Set;this.listenTo(o,"applyOperation",(e,t)=>{const i=t[0];if("rename"==i.type&&"listItem"==i.oldName){const e=i.position.nodeAfter;e.hasAttribute("todoListChecked")&&a.add(e)}else if("changeAttribute"==i.type&&"listType"==i.key&&"todo"===i.oldValue)for(const e of i.range.getItems())e.hasAttribute("todoListChecked")&&"todo"!==e.getAttribute("listType")&&a.add(e)}),o.document.registerPostFixer(e=>{let t=!1;for(const i of a)e.removeAttribute("todoListChecked",i),t=!0;return a.clear(),t})}_handleCheckmarkChange(e){const t=this.editor,i=t.model,o=Array.from(i.document.selection.getRanges());i.change(i=>{i.setSelection(e,"end"),t.execute("checkTodoList"),i.setSelection(o)})}}class Fb extends Qe{static get pluginName(){return"TodoListUI"}init(){const e=this.editor.t;eb(this.editor,"todoList",e("To-do List"),'')}}i(100);function Db(e,t){if(!e.childCount)return;const i=new Gh(e.document),o=function(e,t){const i=t.createRangeIn(e),o=new fo({name:/^p|h\d+$/,styles:{"mso-list":/.*/}}),n=[];for(const e of i)if("elementStart"===e.type&&o.match(e.item)){const t=jb(e.item);n.push({element:e.item,id:t.id,order:t.order,indent:t.indent})}return n}(e,i);if(!o.length)return;let n=null,r=1;o.forEach((e,s)=>{const a=function(e,t){if(!e)return!0;if(e.id!==t.id)return t.indent-e.indent!=1;const i=t.element.previousSibling;if(!i)return!0;return o=i,!(o.is("element","ol")||o.is("element","ul"));var o}(o[s-1],e),l=a?null:o[s-1],c=(h=e,(d=l)?h.indent-d.indent:h.indent-1);var d,h;if(a&&(n=null,r=1),!n||0!==c){const o=function(e,t){const i=new RegExp(`@list l${e.id}:level${e.indent}\\s*({[^}]*)`,"gi"),o=/mso-level-number-format:([^;]{0,100});/gi,n=i.exec(t);let r="decimal",s="ol";if(n&&n[1]){const t=o.exec(n[1]);if(t&&t[1]&&(r=t[1].trim(),s="bullet"!==r&&"image"!==r?"ol":"ul"),"bullet"===r){const t=function(e){const t=function(e){if(e.getChild(0).is("$text"))return null;const t=e.getChild(0).getChild(0);if(t.is("$text"))return t;return t.getChild(0)}(e);if(!t)return null;const i=t._data;if("o"===i)return"circle";if("·"===i)return"disc";if("§"===i)return"square";return null}(e.element);t&&(r=t)}}return{type:s,style:Lb(r)}}(e,t);if(n){if(e.indent>r){const e=n.getChild(n.childCount-1),t=e.getChild(e.childCount-1);n=Hb(o,t,i),r+=1}else if(e.indent(\s+)<\/span>/g,(e,t)=>1===t.length?" ":Array(t.length+1).join("  ").substr(0,t.length))}function Ub(e,t){const i=new DOMParser,o=function(e){return $b($b(e)).replace(/([^\S\r\n]*?)[\r\n]+([^\S\r\n]*<\/span>)/g,"$1$2").replace(/<\/span>/g,"").replace(/ <\//g," <\/o:p>/g," ").replace(/( |\u00A0)<\/o:p>/g,"").replace(/>([^\S\r\n]*[\r\n]\s*)<")}(function(e){const t=e.indexOf("");if(t<0)return e;const i=e.indexOf("",t+"".length);return e.substring(0,t+"".length)+(i>=0?e.substring(i):"")}(e=e.replace(/

abc

\n\t\t\t//\n\t\t\tif ( isAttribute && this._wrapAttributeElement( wrapElement, child ) ) {\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// Wrap the child if it is not an attribute element or if it is an attribute element that should be inside\n\t\t\t// `wrapElement` (due to priority).\n\t\t\t//\n\t\t\t//

abc

-->

abc

\n\t\t\t//

abc

-->

abc

\n\t\t\telse if ( isText || isAllowedInsideAttributeElement || ( isAttribute && shouldABeOutsideB( wrapElement, child ) ) ) {\n\t\t\t\t// Clone attribute.\n\t\t\t\tconst newAttribute = wrapElement._clone();\n\n\t\t\t\t// Wrap current node with new attribute.\n\t\t\t\tchild._remove();\n\t\t\t\tnewAttribute._appendChild( child );\n\n\t\t\t\tparent._insertChild( i, newAttribute );\n\t\t\t\tthis._addToClonedElementsGroup( newAttribute );\n\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// If other nested attribute is found and it wasn't wrapped (see above), continue wrapping inside it.\n\t\t\t//\n\t\t\t//

abc

-->

abc

\n\t\t\t//\n\t\t\telse if ( isAttribute ) {\n\t\t\t\tthis._wrapChildren( child, 0, child.childCount, wrapElement );\n\t\t\t}\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each wrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of wrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Unwraps children from provided `unwrapElement`. Only children contained in `parent` element between\n\t * `startOffset` and `endOffset` will be unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} parent\n\t * @param {Number} startOffset\n\t * @param {Number} endOffset\n\t * @param {module:engine/view/element~Element} unwrapElement\n\t */\n\t_unwrapChildren( parent, startOffset, endOffset, unwrapElement ) {\n\t\tlet i = startOffset;\n\t\tconst unwrapPositions = [];\n\n\t\t// Iterate over each element between provided offsets inside parent.\n\t\t// We don't use tree walker or range iterator because we will be removing and merging potentially multiple nodes,\n\t\t// so it could get messy. It is safer to it manually in this case.\n\t\twhile ( i < endOffset ) {\n\t\t\tconst child = parent.getChild( i );\n\n\t\t\t// Skip all text nodes. There should be no container element's here either.\n\t\t\tif ( !child.is( 'attributeElement' ) ) {\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// (In all examples, assume that `unwrapElement` is `` element.)\n\t\t\t//\n\t\t\t// If the child is similar to the given attribute element, unwrap it - it will be completely removed.\n\t\t\t//\n\t\t\t//

abcxyz

-->

abcxyz

\n\t\t\t//\n\t\t\tif ( child.isSimilar( unwrapElement ) ) {\n\t\t\t\tconst unwrapped = child.getChildren();\n\t\t\t\tconst count = child.childCount;\n\n\t\t\t\t// Replace wrapper element with its children\n\t\t\t\tchild._remove();\n\t\t\t\tparent._insertChild( i, unwrapped );\n\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\n\t\t\t\t// Save start and end position of moved items.\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + count )\n\t\t\t\t);\n\n\t\t\t\t// Skip elements that were unwrapped. Assuming there won't be another element to unwrap in child elements.\n\t\t\t\ti += count;\n\t\t\t\tendOffset += count - 1;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If the child is not similar but is an attribute element, try partial unwrapping - remove the same attributes/styles/classes.\n\t\t\t// Partial unwrapping will happen only if the elements have the same name.\n\t\t\t//\n\t\t\t//

abcxyz

-->

abcxyz

\n\t\t\t//

abcxyz

-->

abcxyz

\n\t\t\t//\n\t\t\tif ( this._unwrapAttributeElement( unwrapElement, child ) ) {\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + 1 )\n\t\t\t\t);\n\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If other nested attribute is found, look through it's children for elements to unwrap.\n\t\t\t//\n\t\t\t//

abc

-->

abc

\n\t\t\t//\n\t\t\tthis._unwrapChildren( child, 0, child.childCount, unwrapElement );\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each unwrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of unwrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset || position.offset == endOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Helper function for `view.writer.wrap`. Wraps range with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/range~Range} New range after wrapping, spanning over wrapping attribute element.\n\t */\n\t_wrapRange( range, attribute ) {\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\t// Wrap all children with attribute.\n\t\tconst newRange = this._wrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t\t// Merge attributes at the both ends and return a new range.\n\t\tconst start = this.mergeAttributes( newRange.start );\n\n\t\t// If start position was merged - move end position back.\n\t\tif ( !start.isEqual( newRange.start ) ) {\n\t\t\tnewRange.end.offset--;\n\t\t}\n\t\tconst end = this.mergeAttributes( newRange.end );\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Helper function for {@link #wrap}. Wraps position with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/position~Position} New position after wrapping.\n\t */\n\t_wrapPosition( position, attribute ) {\n\t\t// Return same position when trying to wrap with attribute similar to position parent.\n\t\tif ( attribute.isSimilar( position.parent ) ) {\n\t\t\treturn movePositionToTextNode( position.clone() );\n\t\t}\n\n\t\t// When position is inside text node - break it and place new position between two text nodes.\n\t\tif ( position.parent.is( '$text' ) ) {\n\t\t\tposition = breakTextNode( position );\n\t\t}\n\n\t\t// Create fake element that will represent position, and will not be merged with other attributes.\n\t\tconst fakePosition = this.createAttributeElement();\n\t\tfakePosition._priority = Number.POSITIVE_INFINITY;\n\t\tfakePosition.isSimilar = () => false;\n\n\t\t// Insert fake element in position location.\n\t\tposition.parent._insertChild( position.offset, fakePosition );\n\n\t\t// Range around inserted fake attribute element.\n\t\tconst wrapRange = new Range( position, position.getShiftedBy( 1 ) );\n\n\t\t// Wrap fake element with attribute (it will also merge if possible).\n\t\tthis.wrap( wrapRange, attribute );\n\n\t\t// Remove fake element and place new position there.\n\t\tconst newPosition = new Position( fakePosition.parent, fakePosition.index );\n\t\tfakePosition._remove();\n\n\t\t// If position is placed between text nodes - merge them and return position inside.\n\t\tconst nodeBefore = newPosition.nodeBefore;\n\t\tconst nodeAfter = newPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof Text && nodeAfter instanceof Text ) {\n\t\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t\t}\n\n\t\t// If position is next to text node - move position inside.\n\t\treturn movePositionToTextNode( newPosition );\n\t}\n\n\t/**\n\t * \tWraps one {@link module:engine/view/attributeelement~AttributeElement AttributeElement} into another by\n\t * \tmerging them if possible. When merging is possible - all attributes, styles and classes are moved from wrapper\n\t * \telement to element being wrapped.\n\t *\n\t * \t@private\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} toWrap AttributeElement to wrap using wrapper element.\n\t * \t@returns {Boolean} Returns `true` if elements are merged.\n\t */\n\t_wrapAttributeElement( wrapper, toWrap ) {\n\t\tif ( !canBeJoined( wrapper, toWrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't merge if name or priority differs.\n\t\tif ( wrapper.name !== toWrap.name || wrapper.priority !== toWrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if attributes can be merged.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are different we cannot wrap.\n\t\t\tif ( toWrap.hasAttribute( key ) && toWrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if styles can be merged.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( toWrap.hasStyle( key ) && toWrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Move all attributes/classes/styles from wrapper to wrapped AttributeElement.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// Move only these attributes that are not present - other are similar.\n\t\t\tif ( !toWrap.hasAttribute( key ) ) {\n\t\t\t\tthis.setAttribute( key, wrapper.getAttribute( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( !toWrap.hasStyle( key ) ) {\n\t\t\t\tthis.setStyle( key, wrapper.getStyle( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getClassNames() ) {\n\t\t\tif ( !toWrap.hasClass( key ) ) {\n\t\t\t\tthis.addClass( key, toWrap );\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Unwraps {@link module:engine/view/attributeelement~AttributeElement AttributeElement} from another by removing\n\t * corresponding attributes, classes and styles. All attributes, classes and styles from wrapper should be present\n\t * inside element being unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * @param {module:engine/view/attributeelement~AttributeElement} toUnwrap AttributeElement to unwrap using wrapper element.\n\t * @returns {Boolean} Returns `true` if elements are unwrapped.\n\t **/\n\t_unwrapAttributeElement( wrapper, toUnwrap ) {\n\t\tif ( !canBeJoined( wrapper, toUnwrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't unwrap if name or priority differs.\n\t\tif ( wrapper.name !== toUnwrap.name || wrapper.priority !== toUnwrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper attributes.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasAttribute( key ) || toUnwrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper classes.\n\t\tif ( !toUnwrap.hasClass( ...wrapper.getClassNames() ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper styles.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\t// If some styles are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasStyle( key ) || toUnwrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Remove all wrapper's attributes from unwrapped element.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tthis.removeAttribute( key, toUnwrap );\n\t\t}\n\n\t\t// Remove all wrapper's classes from unwrapped element.\n\t\tthis.removeClass( Array.from( wrapper.getClassNames() ), toUnwrap );\n\n\t\t// Remove all wrapper's styles from unwrapped element.\n\t\tthis.removeStyle( Array.from( wrapper.getStyleNames() ), toUnwrap );\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at the boundaries of given range.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range Range which `start` and `end` positions will be used to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/range~Range} New range with located at break positions.\n\t */\n\t_breakAttributesRange( range, forceSplitText = false ) {\n\t\tconst rangeStart = range.start;\n\t\tconst rangeEnd = range.end;\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// Break at the collapsed position. Return new collapsed range.\n\t\tif ( range.isCollapsed ) {\n\t\t\tconst position = this._breakAttributes( range.start, forceSplitText );\n\n\t\t\treturn new Range( position, position );\n\t\t}\n\n\t\tconst breakEnd = this._breakAttributes( rangeEnd, forceSplitText );\n\t\tconst count = breakEnd.parent.childCount;\n\t\tconst breakStart = this._breakAttributes( rangeStart, forceSplitText );\n\n\t\t// Calculate new break end offset.\n\t\tbreakEnd.offset += breakEnd.parent.childCount - count;\n\n\t\treturn new Range( breakStart, breakEnd );\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at given position.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element` when break position\n\t * is placed inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element` when break position\n\t * is placed inside {@link module:engine/view/uielement~UIElement UIElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position Position where to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/position~Position} New position after breaking the attributes.\n\t */\n\t_breakAttributes( position, forceSplitText = false ) {\n\t\tconst positionOffset = position.offset;\n\t\tconst positionParent = position.parent;\n\n\t\t// If position is placed inside EmptyElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'emptyElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break an `EmptyElement` instance.\n\t\t\t *\n\t\t\t * This error is thrown if\n\t\t\t * {@link module:engine/view/downcastwriter~DowncastWriter#breakAttributes `DowncastWriter#breakAttributes()`}\n\t\t\t * was executed in an incorrect position.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-empty-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-empty-element', this.document );\n\t\t}\n\n\t\t// If position is placed inside UIElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'uiElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break a `UIElement` instance.\n\t\t\t *\n\t\t\t * This error is thrown if\n\t\t\t * {@link module:engine/view/downcastwriter~DowncastWriter#breakAttributes `DowncastWriter#breakAttributes()`}\n\t\t\t * was executed in an incorrect position.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-ui-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-ui-element', this.document );\n\t\t}\n\n\t\t// If position is placed inside RawElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'rawElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break a `RawElement` instance.\n\t\t\t *\n\t\t\t * This error is thrown if\n\t\t\t * {@link module:engine/view/downcastwriter~DowncastWriter#breakAttributes `DowncastWriter#breakAttributes()`}\n\t\t\t * was executed in an incorrect position.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-raw-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-raw-element', this.document );\n\t\t}\n\n\t\t// There are no attributes to break and text nodes breaking is not forced.\n\t\tif ( !forceSplitText && positionParent.is( '$text' ) && isContainerOrFragment( positionParent.parent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Position's parent is container, so no attributes to break.\n\t\tif ( isContainerOrFragment( positionParent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Break text and start again in new position.\n\t\tif ( positionParent.is( '$text' ) ) {\n\t\t\treturn this._breakAttributes( breakTextNode( position ), forceSplitText );\n\t\t}\n\n\t\tconst length = positionParent.childCount;\n\n\t\t//

foobar{}

\n\t\t//

foobar[]

\n\t\t//

foobar[]

\n\t\tif ( positionOffset == length ) {\n\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index + 1 );\n\n\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t} else {\n\t\t\t//

foo{}bar

\n\t\t\t//

foo[]bar

\n\t\t\t//

foo{}bar

\n\t\t\tif ( positionOffset === 0 ) {\n\t\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t\t//

foob{}ar

\n\t\t\t//

foob[]ar

\n\t\t\t//

foob[]ar

\n\t\t\t//

foob[]ar

\n\t\t\telse {\n\t\t\t\tconst offsetAfter = positionParent.index + 1;\n\n\t\t\t\t// Break element.\n\t\t\t\tconst clonedNode = positionParent._clone();\n\n\t\t\t\t// Insert cloned node to position's parent node.\n\t\t\t\tpositionParent.parent._insertChild( offsetAfter, clonedNode );\n\t\t\t\tthis._addToClonedElementsGroup( clonedNode );\n\n\t\t\t\t// Get nodes to move.\n\t\t\t\tconst count = positionParent.childCount - positionOffset;\n\t\t\t\tconst nodesToMove = positionParent._removeChildren( positionOffset, count );\n\n\t\t\t\t// Move nodes to cloned node.\n\t\t\t\tclonedNode._appendChild( nodesToMove );\n\n\t\t\t\t// Create new position to work on.\n\t\t\t\tconst newPosition = new Position( positionParent.parent, offsetAfter );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Stores the information that an {@link module:engine/view/attributeelement~AttributeElement attribute element} was\n\t * added to the tree. Saves the reference to the group in the given element and updates the group, so other elements\n\t * from the group now keep a reference to the given attribute element.\n\t *\n\t * The clones group can be obtained using {@link module:engine/view/attributeelement~AttributeElement#getElementsWithSameId}.\n\t *\n\t * Does nothing if added element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to save.\n\t */\n\t_addToClonedElementsGroup( element ) {\n\t\t// Add only if the element is in document tree.\n\t\tif ( !element.root.is( 'rootElement' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Traverse the element's children recursively to find other attribute elements that also might got inserted.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._addToClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tlet group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\tgroup = new Set();\n\t\t\tthis._cloneGroups.set( id, group );\n\t\t}\n\n\t\tgroup.add( element );\n\t\telement._clonesGroup = group;\n\t}\n\n\t/**\n\t * Removes all the information about the given {@link module:engine/view/attributeelement~AttributeElement attribute element}\n\t * from its clones group.\n\t *\n\t * Keep in mind, that the element will still keep a reference to the group (but the group will not keep a reference to it).\n\t * This allows to reference the whole group even if the element was already removed from the tree.\n\t *\n\t * Does nothing if the element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to remove.\n\t */\n\t_removeFromClonedElementsGroup( element ) {\n\t\t// Traverse the element's children recursively to find other attribute elements that also got removed.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\treturn;\n\t\t}\n\n\t\tgroup.delete( element );\n\t\t// Not removing group from element on purpose!\n\t\t// If other parts of code have reference to this element, they will be able to get references to other elements from the group.\n\t}\n}\n\n// Helper function for `view.writer.wrap`. Checks if given element has any children that are not ui elements.\nfunction _hasNonUiChildren( parent ) {\n\treturn Array.from( parent.getChildren() ).some( child => !child.is( 'uiElement' ) );\n}\n\n/**\n * The `attribute` passed to {@link module:engine/view/downcastwriter~DowncastWriter#wrap `DowncastWriter#wrap()`}\n * must be an instance of {@link module:engine/view/attributeelement~AttributeElement `AttributeElement`}.\n *\n * @error view-writer-wrap-invalid-attribute\n */\n\n// Returns first parent container of specified {@link module:engine/view/position~Position Position}.\n// Position's parent node is checked as first, then next parents are checked.\n// Note that {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n//\n// @param {module:engine/view/position~Position} position Position used as a start point to locate parent container.\n// @returns {module:engine/view/containerelement~ContainerElement|module:engine/view/documentfragment~DocumentFragment|undefined}\n// Parent container element or `undefined` if container is not found.\nfunction getParentContainer( position ) {\n\tlet parent = position.parent;\n\n\twhile ( !isContainerOrFragment( parent ) ) {\n\t\tif ( !parent ) {\n\t\t\treturn undefined;\n\t\t}\n\t\tparent = parent.parent;\n\t}\n\n\treturn parent;\n}\n\n// Checks if first {@link module:engine/view/attributeelement~AttributeElement AttributeElement} provided to the function\n// can be wrapped outside second element. It is done by comparing elements'\n// {@link module:engine/view/attributeelement~AttributeElement#priority priorities}, if both have same priority\n// {@link module:engine/view/element~Element#getIdentity identities} are compared.\n//\n// @param {module:engine/view/attributeelement~AttributeElement} a\n// @param {module:engine/view/attributeelement~AttributeElement} b\n// @returns {Boolean}\nfunction shouldABeOutsideB( a, b ) {\n\tif ( a.priority < b.priority ) {\n\t\treturn true;\n\t} else if ( a.priority > b.priority ) {\n\t\treturn false;\n\t}\n\n\t// When priorities are equal and names are different - use identities.\n\treturn a.getIdentity() < b.getIdentity();\n}\n\n// Returns new position that is moved to near text node. Returns same position if there is no text node before of after\n// specified position.\n//\n//\t\t

foo[]

->

foo{}

\n//\t\t

[]foo

->

{}foo

\n//\n// @param {module:engine/view/position~Position} position\n// @returns {module:engine/view/position~Position} Position located inside text node or same position if there is no text nodes\n// before or after position location.\nfunction movePositionToTextNode( position ) {\n\tconst nodeBefore = position.nodeBefore;\n\n\tif ( nodeBefore && nodeBefore.is( '$text' ) ) {\n\t\treturn new Position( nodeBefore, nodeBefore.data.length );\n\t}\n\n\tconst nodeAfter = position.nodeAfter;\n\n\tif ( nodeAfter && nodeAfter.is( '$text' ) ) {\n\t\treturn new Position( nodeAfter, 0 );\n\t}\n\n\treturn position;\n}\n\n// Breaks text node into two text nodes when possible.\n//\n//\t\t

foo{}bar

->

foo[]bar

\n//\t\t

{}foobar

->

[]foobar

\n//\t\t

foobar{}

->

foobar[]

\n//\n// @param {module:engine/view/position~Position} position Position that need to be placed inside text node.\n// @returns {module:engine/view/position~Position} New position after breaking text node.\nfunction breakTextNode( position ) {\n\tif ( position.offset == position.parent.data.length ) {\n\t\treturn new Position( position.parent.parent, position.parent.index + 1 );\n\t}\n\n\tif ( position.offset === 0 ) {\n\t\treturn new Position( position.parent.parent, position.parent.index );\n\t}\n\n\t// Get part of the text that need to be moved.\n\tconst textToMove = position.parent.data.slice( position.offset );\n\n\t// Leave rest of the text in position's parent.\n\tposition.parent._data = position.parent.data.slice( 0, position.offset );\n\n\t// Insert new text node after position's parent text node.\n\tposition.parent.parent._insertChild( position.parent.index + 1, new Text( position.root.document, textToMove ) );\n\n\t// Return new position between two newly created text nodes.\n\treturn new Position( position.parent.parent, position.parent.index + 1 );\n}\n\n// Merges two text nodes into first node. Removes second node and returns merge position.\n//\n// @param {module:engine/view/text~Text} t1 First text node to merge. Data from second text node will be moved at the end of\n// this text node.\n// @param {module:engine/view/text~Text} t2 Second text node to merge. This node will be removed after merging.\n// @returns {module:engine/view/position~Position} Position after merging text nodes.\nfunction mergeTextNodes( t1, t2 ) {\n\t// Merge text data into first text node and remove second one.\n\tconst nodeBeforeLength = t1.data.length;\n\tt1._data += t2.data;\n\tt2._remove();\n\n\treturn new Position( t1, nodeBeforeLength );\n}\n\n// Checks if provided nodes are valid to insert.\n//\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n// contains instances that are not supported ones (see error description for valid ones.\n//\n// @param Iterable. nodes\n// @param {Object} errorContext\nfunction validateNodesToInsert( nodes, errorContext ) {\n\tfor ( const node of nodes ) {\n\t\tif ( !validNodesToInsert.some( ( validNode => node instanceof validNode ) ) ) { // eslint-disable-line no-use-before-define\n\t\t\t/**\n\t\t\t * One of the nodes to be inserted is of an invalid type.\n\t\t\t *\n\t\t\t * Nodes to be inserted with {@link module:engine/view/downcastwriter~DowncastWriter#insert `DowncastWriter#insert()`} should be\n\t\t\t * of the following types:\n\t\t\t *\n\t\t\t * * {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n\t\t\t * * {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n\t\t\t * * {@link module:engine/view/emptyelement~EmptyElement EmptyElement},\n\t\t\t * * {@link module:engine/view/uielement~UIElement UIElement},\n\t\t\t * * {@link module:engine/view/rawelement~RawElement RawElement},\n\t\t\t * * {@link module:engine/view/text~Text Text}.\n\t\t\t *\n\t\t\t * @error view-writer-insert-invalid-node-type\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-insert-invalid-node-type', errorContext );\n\t\t}\n\n\t\tif ( !node.is( '$text' ) ) {\n\t\t\tvalidateNodesToInsert( node.getChildren(), errorContext );\n\t\t}\n\t}\n}\n\nconst validNodesToInsert = [ Text, AttributeElement, ContainerElement, EmptyElement, RawElement, UIElement ];\n\n// Checks if node is ContainerElement or DocumentFragment, because in most cases they should be treated the same way.\n//\n// @param {module:engine/view/node~Node} node\n// @returns {Boolean} Returns `true` if node is instance of ContainerElement or DocumentFragment.\nfunction isContainerOrFragment( node ) {\n\treturn node && ( node.is( 'containerElement' ) || node.is( 'documentFragment' ) );\n}\n\n// Checks if {@link module:engine/view/range~Range#start range start} and {@link module:engine/view/range~Range#end range end} are placed\n// inside same {@link module:engine/view/containerelement~ContainerElement container element}.\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when validation fails.\n//\n// @param {module:engine/view/range~Range} range\n// @param {Object} errorContext\nfunction validateRangeContainer( range, errorContext ) {\n\tconst startContainer = getParentContainer( range.start );\n\tconst endContainer = getParentContainer( range.end );\n\n\tif ( !startContainer || !endContainer || startContainer !== endContainer ) {\n\t\t/**\n\t\t * The container of the given range is invalid.\n\t\t *\n\t\t * This may happen if {@link module:engine/view/range~Range#start range start} and\n\t\t * {@link module:engine/view/range~Range#end range end} positions are not placed inside the same container element or\n\t\t * a parent container for these positions cannot be found.\n\t\t *\n\t\t * Methods like {@link module:engine/view/downcastwriter~DowncastWriter#wrap `DowncastWriter#remove()`},\n\t\t * {@link module:engine/view/downcastwriter~DowncastWriter#wrap `DowncastWriter#clean()`},\n\t\t * {@link module:engine/view/downcastwriter~DowncastWriter#wrap `DowncastWriter#wrap()`},\n\t\t * {@link module:engine/view/downcastwriter~DowncastWriter#wrap `DowncastWriter#unwrap()`} need to be called\n\t\t * on a range that has its start and end positions located in the same container element. Both positions can be\n\t\t * nested within other elements (e.g. an attribute element) but the closest container ancestor must be the same.\n\t\t *\n\t\t * @error view-writer-invalid-range-container\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-invalid-range-container', errorContext );\n\t}\n}\n\n// Checks if two attribute elements can be joined together. Elements can be joined together if, and only if\n// they do not have ids specified.\n//\n// @private\n// @param {module:engine/view/element~Element} a\n// @param {module:engine/view/element~Element} b\n// @returns {Boolean}\nfunction canBeJoined( a, b ) {\n\treturn a.id === null && b.id === null;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/istext\n */\n\n/**\n * Checks if the object is a native DOM Text node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isText( obj ) {\n\treturn Object.prototype.toString.call( obj ) == '[object Text]';\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\n\n/**\n * Set of utils related to block and inline fillers handling.\n *\n * Browsers do not allow to put caret in elements which does not have height. Because of it, we need to fill all\n * empty elements which should be selectable with elements or characters called \"fillers\". Unfortunately there is no one\n * universal filler, this is why two types are uses:\n *\n * * Block filler is an element which fill block elements, like `

`. CKEditor uses `
` as a block filler during the editing,\n * as browsers do natively. So instead of an empty `

` there will be `


`. The advantage of block filler is that\n * it is transparent for the selection, so when the caret is before the `
` and user presses right arrow he will be\n * moved to the next paragraph, not after the `
`. The disadvantage is that it breaks a block, so it can not be used\n * in the middle of a line of text. The {@link module:engine/view/filler~BR_FILLER `
` filler} can be replaced with any other\n * character in the data output, for instance {@link module:engine/view/filler~NBSP_FILLER non-breaking space} or\n * {@link module:engine/view/filler~MARKED_NBSP_FILLER marked non-breaking space}.\n *\n * * Inline filler is a filler which does not break a line of text, so it can be used inside the text, for instance in the empty\n * `` surrendered by text: `foobar`, if we want to put the caret there. CKEditor uses a sequence of the zero-width\n * spaces as an {@link module:engine/view/filler~INLINE_FILLER inline filler} having the predetermined\n * {@link module:engine/view/filler~INLINE_FILLER_LENGTH length}. A sequence is used, instead of a single character to\n * avoid treating random zero-width spaces as the inline filler. Disadvantage of the inline filler is that it is not\n * transparent for the selection. The arrow key moves the caret between zero-width spaces characters, so the additional\n * code is needed to handle the caret.\n *\n * Both inline and block fillers are handled by the {@link module:engine/view/renderer~Renderer renderer} and are not present in the\n * view.\n *\n * @module engine/view/filler\n */\n\n/**\n * Non-breaking space filler creator. This is a function which creates ` ` text node.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~MARKED_NBSP_FILLER\n * @see module:engine/view/filler~BR_FILLER\n * @function\n */\nexport const NBSP_FILLER = domDocument => domDocument.createTextNode( '\\u00A0' );\n\n/**\n * Marked non-breaking space filler creator. This is a function which creates ` ` element.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~NBSP_FILLER\n * @see module:engine/view/filler~BR_FILLER\n * @function\n */\nexport const MARKED_NBSP_FILLER = domDocument => {\n\tconst span = domDocument.createElement( 'span' );\n\tspan.dataset.ckeFiller = true;\n\tspan.innerHTML = '\\u00A0';\n\n\treturn span;\n};\n\n/**\n * `
` filler creator. This is a function which creates `
` element.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~NBSP_FILLER\n * @see module:engine/view/filler~MARKED_NBSP_FILLER\n * @function\n */\nexport const BR_FILLER = domDocument => {\n\tconst fillerBr = domDocument.createElement( 'br' );\n\tfillerBr.dataset.ckeFiller = true;\n\n\treturn fillerBr;\n};\n\n/**\n * Length of the {@link module:engine/view/filler~INLINE_FILLER INLINE_FILLER}.\n */\nexport const INLINE_FILLER_LENGTH = 7;\n\n/**\n * Inline filler which is a sequence of the word joiners.\n *\n * @type {String}\n */\nexport const INLINE_FILLER = '\\u2060'.repeat( INLINE_FILLER_LENGTH );\n\n/**\n * Checks if the node is a text node which starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( 'foo' ) ); // false\n *\t\tstartsWithFiller( document.createElement( 'p' ) ); // false\n *\n * @param {Node} domNode DOM node.\n * @returns {Boolean} True if the text node starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function startsWithFiller( domNode ) {\n\treturn isText( domNode ) && ( domNode.data.substr( 0, INLINE_FILLER_LENGTH ) === INLINE_FILLER );\n}\n\n/**\n * Checks if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // false\n *\n * @param {Text} domText DOM text node.\n * @returns {Boolean} True if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function isInlineFiller( domText ) {\n\treturn domText.data.length == INLINE_FILLER_LENGTH && startsWithFiller( domText );\n}\n\n/**\n * Get string data from the text node, removing an {@link module:engine/view/filler~INLINE_FILLER inline filler} from it,\n * if text node contains it.\n *\n *\t\tgetDataWithoutFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ) == 'foo' // true\n *\t\tgetDataWithoutFiller( document.createTextNode( 'foo' ) ) == 'foo' // true\n *\n * @param {Text} domText DOM text node, possible with inline filler.\n * @returns {String} Data without filler.\n */\nexport function getDataWithoutFiller( domText ) {\n\tif ( startsWithFiller( domText ) ) {\n\t\treturn domText.data.slice( INLINE_FILLER_LENGTH );\n\t} else {\n\t\treturn domText.data;\n\t}\n}\n\n/**\n * Assign key observer which move cursor from the end of the inline filler to the beginning of it when\n * the left arrow is pressed, so the filler does not break navigation.\n *\n * @param {module:engine/view/view~View} view View controller instance we should inject quirks handling on.\n */\nexport function injectQuirksHandling( view ) {\n\tview.document.on( 'arrowKey', jumpOverInlineFiller, { priority: 'low' } );\n}\n\n// Move cursor from the end of the inline filler to the beginning of it when, so the filler does not break navigation.\nfunction jumpOverInlineFiller( evt, data ) {\n\tif ( data.keyCode == keyCodes.arrowleft ) {\n\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\tif ( domSelection.rangeCount == 1 && domSelection.getRangeAt( 0 ).collapsed ) {\n\t\t\tconst domParent = domSelection.getRangeAt( 0 ).startContainer;\n\t\t\tconst domOffset = domSelection.getRangeAt( 0 ).startOffset;\n\n\t\t\tif ( startsWithFiller( domParent ) && domOffset <= INLINE_FILLER_LENGTH ) {\n\t\t\t\tdomSelection.collapse( domParent, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/fastdiff\n */\n\n/**\n * Finds positions of the first and last change in the given string/array and generates a set of changes:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ { index: 2, type: 'insert', values: [ 'x', 'y', 'z' ] } ]\n *\n *\t\tfastDiff( '12a', '12aa' );\n *\t\t// [ { index: 3, type: 'insert', values: [ 'a' ] } ]\n *\n *\t\tfastDiff( '12xyza', '12a' );\n *\t\t// [ { index: 2, type: 'delete', howMany: 3 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'a' ], [ '1', '2', 'a' ] );\n *\t\t// [ { index: 3, type: 'delete', howMany: 1 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'b', 'c', '3' ], [ '2', 'a', 'b' ] );\n *\t\t// [ { index: 0, type: 'insert', values: [ '2', 'a', 'b' ] }, { index: 3, type: 'delete', howMany: 6 } ]\n *\n * Passed arrays can contain any type of data, however to compare them correctly custom comparator function\n * should be passed as a third parameter:\n *\n *\t\tfastDiff( [ { value: 1 }, { value: 2 } ], [ { value: 1 }, { value: 3 } ], ( a, b ) => {\n *\t\t\treturn a.value === b.value;\n *\t\t} );\n *\t\t// [ { index: 1, type: 'insert', values: [ { value: 3 } ] }, { index: 2, type: 'delete', howMany: 1 } ]\n *\n * The resulted set of changes can be applied to the input in order to transform it into the output, for example:\n *\n *\t\tlet input = '12abc3';\n *\t\tconst output = '2ab';\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + change.values.join( '' ) + input.substring( change.index );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + input.substring( change.index + change.howMany );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * or in case of arrays:\n *\n *\t\tlet input = [ '1', '2', 'a', 'b', 'c', '3' ];\n *\t\tconst output = [ '2', 'a', 'b' ];\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( change.values, input.slice( change.index ) );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( input.slice( change.index + change.howMany ) );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * By passing `true` as the fourth parameter (`atomicChanges`) the output of this function will become compatible with\n * the {@link module:utils/diff~diff `diff()`} function:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ 'equal', 'equal', 'insert', 'insert', 'insert', 'equal' ]\n *\n * The default output format of this function is compatible with the output format of\n * {@link module:utils/difftochanges~diffToChanges `diffToChanges()`}. The `diffToChanges()` input format is, in turn,\n * compatible with the output of {@link module:utils/diff~diff `diff()`}:\n *\n *\t\tconst a = '1234';\n *\t\tconst b = '12xyz34';\n *\n *\t\t// Both calls will return the same results (grouped changes format).\n *\t\tfastDiff( a, b );\n *\t\tdiffToChanges( diff( a, b ) );\n *\n *\t\t// Again, both calls will return the same results (atomic changes format).\n *\t\tfastDiff( a, b, null, true );\n *\t\tdiff( a, b );\n *\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Input array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default `===` (strict equal operator) is used.\n * @param {Boolean} [atomicChanges=false] Whether an array of `inset|delete|equal` operations should\n * be returned instead of changes set. This makes this function compatible with {@link module:utils/diff~diff `diff()`}.\n * @returns {Array} Array of changes.\n */\nexport default function fastDiff( a, b, cmp, atomicChanges = false ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\t// Convert the string (or any array-like object - eg. NodeList) to an array by using the slice() method because,\n\t// unlike Array.from(), it returns array of UTF-16 code units instead of the code points of a string.\n\t// One code point might be a surrogate pair of two code units. All text offsets are expected to be in code units.\n\t// See ckeditor/ckeditor5#3147.\n\t//\n\t// We need to make sure here that fastDiff() works identical to diff().\n\tif ( !Array.isArray( a ) ) {\n\t\ta = Array.prototype.slice.call( a );\n\t}\n\n\tif ( !Array.isArray( b ) ) {\n\t\tb = Array.prototype.slice.call( b );\n\t}\n\n\t// Find first and last change.\n\tconst changeIndexes = findChangeBoundaryIndexes( a, b, cmp );\n\n\t// Transform into changes array.\n\treturn atomicChanges ? changeIndexesToAtomicChanges( changeIndexes, b.length ) : changeIndexesToChanges( b, changeIndexes );\n}\n\n// Finds position of the first and last change in the given arrays. For example:\n//\n//\t\tconst indexes = findChangeBoundaryIndexes( [ '1', '2', '3', '4' ], [ '1', '3', '4', '2', '4' ] );\n//\t\tconsole.log( indexes ); // { firstIndex: 1, lastIndexOld: 3, lastIndexNew: 4 }\n//\n// The above indexes means that in the first array the modified part is `1[23]4` and in the second array it is `1[342]4`.\n// Based on such indexes, array with `insert`/`delete` operations which allows transforming first value into the second one\n// can be generated.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Object}\n// @returns {Number} return.firstIndex Index of the first change in both values (always the same for both).\n// @returns {Number} result.lastIndexOld Index of the last common value in `arr1`.\n// @returns {Number} result.lastIndexNew Index of the last common value in `arr2`.\nfunction findChangeBoundaryIndexes( arr1, arr2, cmp ) {\n\t// Find the first difference between passed values.\n\tconst firstIndex = findFirstDifferenceIndex( arr1, arr2, cmp );\n\n\t// If arrays are equal return -1 indexes object.\n\tif ( firstIndex === -1 ) {\n\t\treturn { firstIndex: -1, lastIndexOld: -1, lastIndexNew: -1 };\n\t}\n\n\t// Remove the common part of each value and reverse them to make it simpler to find the last difference between them.\n\tconst oldArrayReversed = cutAndReverse( arr1, firstIndex );\n\tconst newArrayReversed = cutAndReverse( arr2, firstIndex );\n\n\t// Find the first difference between reversed values.\n\t// It should be treated as \"how many elements from the end the last difference occurred\".\n\t//\n\t// For example:\n\t//\n\t// \t\t\t\tinitial\t->\tafter cut\t-> reversed:\n\t// oldValue:\t'321ba'\t->\t'21ba'\t\t-> 'ab12'\n\t// newValue:\t'31xba'\t->\t'1xba'\t\t-> 'abx1'\n\t// lastIndex:\t\t\t\t\t\t\t-> 2\n\t//\n\t// So the last change occurred two characters from the end of the arrays.\n\tconst lastIndex = findFirstDifferenceIndex( oldArrayReversed, newArrayReversed, cmp );\n\n\t// Use `lastIndex` to calculate proper offset, starting from the beginning (`lastIndex` kind of starts from the end).\n\tconst lastIndexOld = arr1.length - lastIndex;\n\tconst lastIndexNew = arr2.length - lastIndex;\n\n\treturn { firstIndex, lastIndexOld, lastIndexNew };\n}\n\n// Returns a first index on which given arrays differ. If both arrays are the same, -1 is returned.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Number}\nfunction findFirstDifferenceIndex( arr1, arr2, cmp ) {\n\tfor ( let i = 0; i < Math.max( arr1.length, arr2.length ); i++ ) {\n\t\tif ( arr1[ i ] === undefined || arr2[ i ] === undefined || !cmp( arr1[ i ], arr2[ i ] ) ) {\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn -1; // Return -1 if arrays are equal.\n}\n\n// Returns a copy of the given array with `howMany` elements removed starting from the beginning and in reversed order.\n//\n// @param {Array} arr Array to be processed.\n// @param {Number} howMany How many elements from array beginning to remove.\n// @returns {Array} Shortened and reversed array.\nfunction cutAndReverse( arr, howMany ) {\n\treturn arr.slice( howMany ).reverse();\n}\n\n// Generates changes array based on change indexes from `findChangeBoundaryIndexes` function. This function will\n// generate array with 0 (no changes), 1 (deletion or insertion) or 2 records (insertion and deletion).\n//\n// @param {Array} newArray New array for which change indexes were calculated.\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @returns {Array.} Array of changes compatible with {@link module:utils/difftochanges~diffToChanges} format.\nfunction changeIndexesToChanges( newArray, changeIndexes ) {\n\tconst result = [];\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// Order operations as 'insert', 'delete' array to keep compatibility with {@link module:utils/difftochanges~diffToChanges}\n\t// in most cases. However, 'diffToChanges' does not stick to any order so in some cases\n\t// (for example replacing '12345' with 'abcd') it will generate 'delete', 'insert' order.\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex,\n\t\t\ttype: 'insert',\n\t\t\tvalues: newArray.slice( firstIndex, lastIndexNew )\n\t\t} );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex + ( lastIndexNew - firstIndex ), // Increase index of what was inserted.\n\t\t\ttype: 'delete',\n\t\t\thowMany: lastIndexOld - firstIndex\n\t\t} );\n\t}\n\n\treturn result;\n}\n\n// Generates array with set `equal|insert|delete` operations based on change indexes from `findChangeBoundaryIndexes` function.\n//\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @param {Number} newLength Length of the new array on which `findChangeBoundaryIndexes` calculated change indexes.\n// @returns {Array.} Array of changes compatible with {@link module:utils/diff~diff} format.\nfunction changeIndexesToAtomicChanges( changeIndexes, newLength ) {\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// No changes.\n\tif ( firstIndex === -1 ) {\n\t\treturn Array( newLength ).fill( 'equal' );\n\t}\n\n\tlet result = [];\n\tif ( firstIndex > 0 ) {\n\t\tresult = result.concat( Array( firstIndex ).fill( 'equal' ) );\n\t}\n\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexNew - firstIndex ).fill( 'insert' ) );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexOld - firstIndex ).fill( 'delete' ) );\n\t}\n\n\tif ( lastIndexNew < newLength ) {\n\t\tresult = result.concat( Array( newLength - lastIndexNew ).fill( 'equal' ) );\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/diff\n */\n\nimport fastDiff from '../src/fastdiff';\n\n// The following code is based on the \"O(NP) Sequence Comparison Algorithm\"\n// by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n\n/**\n * Calculates the difference between two arrays or strings producing an array containing a list of changes\n * necessary to transform input into output.\n *\n *\t\tdiff( 'aba', 'acca' ); // [ 'equal', 'insert', 'insert', 'delete', 'equal' ]\n *\n * This function is based on the \"O(NP) Sequence Comparison Algorithm\" by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n * Unfortunately, while it gives the most precise results, its to complex for longer strings/arrow (above 200 items).\n * Therefore, `diff()` automatically switches to {@link module:utils/fastdiff~fastDiff `fastDiff()`} when detecting\n * such a scenario. The return formats of both functions are identical.\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Output array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default === is used.\n * @returns {Array} Array of changes.\n */\nexport default function diff( a, b, cmp ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\tconst aLength = a.length;\n\tconst bLength = b.length;\n\n\t// Perform `fastDiff` for longer strings/arrays (see #269).\n\tif ( aLength > 200 || bLength > 200 || aLength + bLength > 300 ) {\n\t\treturn diff.fastDiff( a, b, cmp, true );\n\t}\n\n\t// Temporary action type statics.\n\tlet _insert, _delete;\n\n\t// Swapped the arrays to use the shorter one as the first one.\n\tif ( bLength < aLength ) {\n\t\tconst tmp = a;\n\n\t\ta = b;\n\t\tb = tmp;\n\n\t\t// We swap the action types as well.\n\t\t_insert = 'delete';\n\t\t_delete = 'insert';\n\t} else {\n\t\t_insert = 'insert';\n\t\t_delete = 'delete';\n\t}\n\n\tconst m = a.length;\n\tconst n = b.length;\n\tconst delta = n - m;\n\n\t// Edit scripts, for each diagonal.\n\tconst es = {};\n\t// Furthest points, the furthest y we can get on each diagonal.\n\tconst fp = {};\n\n\tfunction snake( k ) {\n\t\t// We use -1 as an alternative below to handle initial values ( instead of filling the fp with -1 first ).\n\t\t// Furthest points (y) on the diagonal below k.\n\t\tconst y1 = ( fp[ k - 1 ] !== undefined ? fp[ k - 1 ] : -1 ) + 1;\n\t\t// Furthest points (y) on the diagonal above k.\n\t\tconst y2 = fp[ k + 1 ] !== undefined ? fp[ k + 1 ] : -1;\n\t\t// The way we should go to get further.\n\t\tconst dir = y1 > y2 ? -1 : 1;\n\n\t\t// Clone previous changes array (if any).\n\t\tif ( es[ k + dir ] ) {\n\t\t\tes[ k ] = es[ k + dir ].slice( 0 );\n\t\t}\n\n\t\t// Create changes array.\n\t\tif ( !es[ k ] ) {\n\t\t\tes[ k ] = [];\n\t\t}\n\n\t\t// Push the action.\n\t\tes[ k ].push( y1 > y2 ? _insert : _delete );\n\n\t\t// Set the beginning coordinates.\n\t\tlet y = Math.max( y1, y2 );\n\t\tlet x = y - k;\n\n\t\t// Traverse the diagonal as long as the values match.\n\t\twhile ( x < m && y < n && cmp( a[ x ], b[ y ] ) ) {\n\t\t\tx++;\n\t\t\ty++;\n\t\t\t// Push no change action.\n\t\t\tes[ k ].push( 'equal' );\n\t\t}\n\n\t\treturn y;\n\t}\n\n\tlet p = 0;\n\tlet k;\n\n\t// Traverse the graph until we reach the end of the longer string.\n\tdo {\n\t\t// Updates furthest points and edit scripts for diagonals below delta.\n\t\tfor ( k = -p; k < delta; k++ ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest points and edit scripts for diagonals above delta.\n\t\tfor ( k = delta + p; k > delta; k-- ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest point and edit script for the delta diagonal.\n\t\t// note that the delta diagonal is the one which goes through the sink (m, n).\n\t\tfp[ delta ] = snake( delta );\n\n\t\tp++;\n\t} while ( fp[ delta ] !== n );\n\n\t// Return the final list of edit changes.\n\t// We remove the first item that represents the action for the injected nulls.\n\treturn es[ delta ].slice( 1 );\n}\n\n// Store the API in static property to easily overwrite it in tests.\n// Too bad dependency injection does not work in Webpack + ES 6 (const) + Babel.\ndiff.fastDiff = fastDiff;\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/insertat\n */\n\n/**\n * Inserts node to the parent at given index.\n *\n * @param {Element} parentElement Parent element.\n * @param {Number} index Insertions index.\n * @param {Node} nodeToInsert Node to insert.\n */\nexport default function insertAt( parentElement, index, nodeToInsert ) {\n\tparentElement.insertBefore( nodeToInsert, parentElement.childNodes[ index ] || null );\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/remove\n */\n\n/**\n * Removes given node from parent.\n *\n * @param {Node} node Node to remove.\n */\nexport default function remove( node ) {\n\tconst parent = node.parentNode;\n\n\tif ( parent ) {\n\t\tparent.removeChild( node );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isnode\n */\n\n/**\n * Checks if the object is a native DOM Node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isNode( obj ) {\n\tif ( obj ) {\n\t\tif ( obj.defaultView ) {\n\t\t\treturn obj instanceof obj.defaultView.Document;\n\t\t} else if ( obj.ownerDocument && obj.ownerDocument.defaultView ) {\n\t\t\treturn obj instanceof obj.ownerDocument.defaultView.Node;\n\t\t}\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module engine/view/renderer\n */\n\nimport ViewText from './text';\nimport ViewPosition from './position';\nimport { INLINE_FILLER, INLINE_FILLER_LENGTH, startsWithFiller, isInlineFiller } from './filler';\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport insertAt from '@ckeditor/ckeditor5-utils/src/dom/insertat';\nimport remove from '@ckeditor/ckeditor5-utils/src/dom/remove';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport isNode from '@ckeditor/ckeditor5-utils/src/dom/isnode';\nimport fastDiff from '@ckeditor/ckeditor5-utils/src/fastdiff';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Renderer is responsible for updating the DOM structure and the DOM selection based on\n * the {@link module:engine/view/renderer~Renderer#markToSync information about updated view nodes}.\n * In other words, it renders the view to the DOM.\n *\n * Its main responsibility is to make only the necessary, minimal changes to the DOM. However, unlike in many\n * virtual DOM implementations, the primary reason for doing minimal changes is not the performance but ensuring\n * that native editing features such as text composition, autocompletion, spell checking, selection's x-index are\n * affected as little as possible.\n *\n * Renderer uses {@link module:engine/view/domconverter~DomConverter} to transform view nodes and positions\n * to and from the DOM.\n */\nexport default class Renderer {\n\t/**\n\t * Creates a renderer instance.\n\t *\n\t * @param {module:engine/view/domconverter~DomConverter} domConverter Converter instance.\n\t * @param {module:engine/view/documentselection~DocumentSelection} selection View selection.\n\t */\n\tconstructor( domConverter, selection ) {\n\t\t/**\n\t\t * Set of DOM Documents instances.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.domDocuments = new Set();\n\n\t\t/**\n\t\t * Converter instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = domConverter;\n\n\t\t/**\n\t\t * Set of nodes which attributes changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.markedAttributes = new Set();\n\n\t\t/**\n\t\t * Set of elements which child lists changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.markedChildren = new Set();\n\n\t\t/**\n\t\t * Set of text nodes which text data changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.markedTexts = new Set();\n\n\t\t/**\n\t\t * View selection. Renderer updates DOM selection based on the view selection.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t */\n\t\tthis.selection = selection;\n\n\t\t/**\n\t\t * Indicates if the view document is focused and selection can be rendered. Selection will not be rendered if\n\t\t * this is set to `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isFocused = false;\n\n\t\t/**\n\t\t * The text node in which the inline filler was rendered.\n\t\t *\n\t\t * @private\n\t\t * @member {Text}\n\t\t */\n\t\tthis._inlineFiller = null;\n\n\t\t/**\n\t\t * DOM element containing fake selection.\n\t\t *\n\t\t * @private\n\t\t * @type {null|HTMLElement}\n\t\t */\n\t\tthis._fakeSelectionContainer = null;\n\t}\n\n\t/**\n\t * Marks a view node to be updated in the DOM by {@link #render `render()`}.\n\t *\n\t * Note that only view nodes whose parents have corresponding DOM elements need to be marked to be synchronized.\n\t *\n\t * @see #markedAttributes\n\t * @see #markedChildren\n\t * @see #markedTexts\n\t *\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Node to be marked.\n\t */\n\tmarkToSync( type, node ) {\n\t\tif ( type === 'text' ) {\n\t\t\tif ( this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis.markedTexts.add( node );\n\t\t\t}\n\t\t} else {\n\t\t\t// If the node has no DOM element it is not rendered yet,\n\t\t\t// its children/attributes do not need to be marked to be sync.\n\t\t\tif ( !this.domConverter.mapViewToDom( node ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( type === 'attributes' ) {\n\t\t\t\tthis.markedAttributes.add( node );\n\t\t\t} else if ( type === 'children' ) {\n\t\t\t\tthis.markedChildren.add( node );\n\t\t\t} else {\n\t\t\t\t/**\n\t\t\t\t * Unknown type passed to Renderer.markToSync.\n\t\t\t\t *\n\t\t\t\t * @error view-renderer-unknown-type\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'view-renderer-unknown-type', this );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Renders all buffered changes ({@link #markedAttributes}, {@link #markedChildren} and {@link #markedTexts}) and\n\t * the current view selection (if needed) to the DOM by applying a minimal set of changes to it.\n\t *\n\t * Renderer tries not to break the text composition (e.g. IME) and x-index of the selection,\n\t * so it does as little as it is needed to update the DOM.\n\t *\n\t * Renderer also handles {@link module:engine/view/filler fillers}. Especially, it checks if the inline filler is needed\n\t * at the selection position and adds or removes it. To prevent breaking text composition inline filler will not be\n\t * removed as long as the selection is in the text node which needed it at first.\n\t */\n\trender() {\n\t\tlet inlineFillerPosition;\n\n\t\t// Refresh mappings.\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildrenMappings( element );\n\t\t}\n\n\t\t// There was inline filler rendered in the DOM but it's not\n\t\t// at the selection position any more, so we can remove it\n\t\t// (cause even if it's needed, it must be placed in another location).\n\t\tif ( this._inlineFiller && !this._isSelectionInInlineFiller() ) {\n\t\t\tthis._removeInlineFiller();\n\t\t}\n\n\t\t// If we've got the filler, let's try to guess its position in the view.\n\t\tif ( this._inlineFiller ) {\n\t\t\tinlineFillerPosition = this._getInlineFillerPosition();\n\t\t}\n\t\t// Otherwise, if it's needed, create it at the selection position.\n\t\telse if ( this._needsInlineFillerAtSelection() ) {\n\t\t\tinlineFillerPosition = this.selection.getFirstPosition();\n\n\t\t\t// Do not use `markToSync` so it will be added even if the parent is already added.\n\t\t\tthis.markedChildren.add( inlineFillerPosition.parent );\n\t\t}\n\n\t\tfor ( const element of this.markedAttributes ) {\n\t\t\tthis._updateAttrs( element );\n\t\t}\n\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildren( element, { inlineFillerPosition } );\n\t\t}\n\n\t\tfor ( const node of this.markedTexts ) {\n\t\t\tif ( !this.markedChildren.has( node.parent ) && this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis._updateText( node, { inlineFillerPosition } );\n\t\t\t}\n\t\t}\n\n\t\t// Check whether the inline filler is required and where it really is in the DOM.\n\t\t// At this point in most cases it will be in the DOM, but there are exceptions.\n\t\t// For example, if the inline filler was deep in the created DOM structure, it will not be created.\n\t\t// Similarly, if it was removed at the beginning of this function and then neither text nor children were updated,\n\t\t// it will not be present.\n\t\t// Fix those and similar scenarios.\n\t\tif ( inlineFillerPosition ) {\n\t\t\tconst fillerDomPosition = this.domConverter.viewPositionToDom( inlineFillerPosition );\n\t\t\tconst domDocument = fillerDomPosition.parent.ownerDocument;\n\n\t\t\tif ( !startsWithFiller( fillerDomPosition.parent ) ) {\n\t\t\t\t// Filler has not been created at filler position. Create it now.\n\t\t\t\tthis._inlineFiller = addInlineFiller( domDocument, fillerDomPosition.parent, fillerDomPosition.offset );\n\t\t\t} else {\n\t\t\t\t// Filler has been found, save it.\n\t\t\t\tthis._inlineFiller = fillerDomPosition.parent;\n\t\t\t}\n\t\t} else {\n\t\t\t// There is no filler needed.\n\t\t\tthis._inlineFiller = null;\n\t\t}\n\n\t\t// First focus the new editing host, then update the selection.\n\t\t// Otherwise, FF may throw an error (https://github.com/ckeditor/ckeditor5/issues/721).\n\t\tthis._updateFocus();\n\t\tthis._updateSelection();\n\n\t\tthis.markedTexts.clear();\n\t\tthis.markedAttributes.clear();\n\t\tthis.markedChildren.clear();\n\t}\n\n\t/**\n\t * Updates mappings of view element's children.\n\t *\n\t * Children that were replaced in the view structure by similar elements (same tag name) are treated as 'replaced'.\n\t * This means that their mappings can be updated so the new view elements are mapped to the existing DOM elements.\n\t * Thanks to that these elements do not need to be re-rendered completely.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose children mappings will be updated.\n\t */\n\t_updateChildrenMappings( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM and there is no need to process it.\n\t\t\treturn;\n\t\t}\n\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { withChildren: false } )\n\t\t);\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\t\tconst actions = this._findReplaceActions( diff, actualDomChildren, expectedDomChildren );\n\n\t\tif ( actions.indexOf( 'replace' ) !== -1 ) {\n\t\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action === 'replace' ) {\n\t\t\t\t\tconst insertIndex = counter.equal + counter.insert;\n\t\t\t\t\tconst deleteIndex = counter.equal + counter.delete;\n\t\t\t\t\tconst viewChild = viewElement.getChild( insertIndex );\n\n\t\t\t\t\t// UIElement and RawElement are special cases. Their children are not stored in a view (#799)\n\t\t\t\t\t// so we cannot use them with replacing flow (since they use view children during rendering\n\t\t\t\t\t// which will always result in rendering empty elements).\n\t\t\t\t\tif ( viewChild && !( viewChild.is( 'uiElement' ) || viewChild.is( 'rawElement' ) ) ) {\n\t\t\t\t\t\tthis._updateElementMappings( viewChild, actualDomChildren[ deleteIndex ] );\n\t\t\t\t\t}\n\n\t\t\t\t\tremove( expectedDomChildren[ insertIndex ] );\n\t\t\t\t\tcounter.equal++;\n\t\t\t\t} else {\n\t\t\t\t\tcounter[ action ]++;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Updates mappings of a given view element.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose mappings will be updated.\n\t * @param {Node} domElement The DOM element representing the given view element.\n\t */\n\t_updateElementMappings( viewElement, domElement ) {\n\t\t// Remap 'DomConverter' bindings.\n\t\tthis.domConverter.unbindDomElement( domElement );\n\t\tthis.domConverter.bindElements( domElement, viewElement );\n\n\t\t// View element may have children which needs to be updated, but are not marked, mark them to update.\n\t\tthis.markedChildren.add( viewElement );\n\n\t\t// Because we replace new view element mapping with the existing one, the corresponding DOM element\n\t\t// will not be rerendered. The new view element may have different attributes than the previous one.\n\t\t// Since its corresponding DOM element will not be rerendered, new attributes will not be added\n\t\t// to the DOM, so we need to mark it here to make sure its attributes gets updated. See #1427 for more\n\t\t// detailed case study.\n\t\t// Also there are cases where replaced element is removed from the view structure and then has\n\t\t// its attributes changed or removed. In such cases the element will not be present in `markedAttributes`\n\t\t// and also may be the same (`element.isSimilar()`) as the reused element not having its attributes updated.\n\t\t// To prevent such situations we always mark reused element to have its attributes rerenderd (#1560).\n\t\tthis.markedAttributes.add( viewElement );\n\t}\n\n\t/**\n\t * Gets the position of the inline filler based on the current selection.\n\t * Here, we assume that we know that the filler is needed and\n\t * {@link #_isSelectionInInlineFiller is at the selection position}, and, since it is needed,\n\t * it is somewhere at the selection position.\n\t *\n\t * Note: The filler position cannot be restored based on the filler's DOM text node, because\n\t * when this method is called (before rendering), the bindings will often be broken. View-to-DOM\n\t * bindings are only dependable after rendering.\n\t *\n\t * @private\n\t * @returns {module:engine/view/position~Position}\n\t */\n\t_getInlineFillerPosition() {\n\t\tconst firstPos = this.selection.getFirstPosition();\n\n\t\tif ( firstPos.parent.is( '$text' ) ) {\n\t\t\treturn ViewPosition._createBefore( this.selection.getFirstPosition().parent );\n\t\t} else {\n\t\t\treturn firstPos;\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` if the selection has not left the inline filler's text node.\n\t * If it is `true`, it means that the filler had been added for a reason and the selection did not\n\t * leave the filler's text node. For example, the user can be in the middle of a composition so it should not be touched.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler and selection are in the same place.\n\t */\n\t_isSelectionInInlineFiller() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Note, we can't check if selection's position equals position of the\n\t\t// this._inlineFiller node, because of #663. We may not be able to calculate\n\t\t// the filler's position in the view at this stage.\n\t\t// Instead, we check it the other way – whether selection is anchored in\n\t\t// that text node or next to it.\n\n\t\t// Possible options are:\n\t\t// \"FILLER{}\"\n\t\t// \"FILLERadded-text{}\"\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst position = this.domConverter.viewPositionToDom( selectionPosition );\n\n\t\tif ( position && isText( position.parent ) && startsWithFiller( position.parent ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Removes the inline filler.\n\t *\n\t * @private\n\t */\n\t_removeInlineFiller() {\n\t\tconst domFillerNode = this._inlineFiller;\n\n\t\t// Something weird happened and the stored node doesn't contain the filler's text.\n\t\tif ( !startsWithFiller( domFillerNode ) ) {\n\t\t\t/**\n\t\t\t * The inline filler node was lost. Most likely, something overwrote the filler text node\n\t\t\t * in the DOM.\n\t\t\t *\n\t\t\t * @error view-renderer-filler-was-lost\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-renderer-filler-was-lost', this );\n\t\t}\n\n\t\tif ( isInlineFiller( domFillerNode ) ) {\n\t\t\tdomFillerNode.parentNode.removeChild( domFillerNode );\n\t\t} else {\n\t\t\tdomFillerNode.data = domFillerNode.data.substr( INLINE_FILLER_LENGTH );\n\t\t}\n\n\t\tthis._inlineFiller = null;\n\t}\n\n\t/**\n\t * Checks if the inline {@link module:engine/view/filler filler} should be added.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler should be added.\n\t */\n\t_needsInlineFillerAtSelection() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst selectionParent = selectionPosition.parent;\n\t\tconst selectionOffset = selectionPosition.offset;\n\n\t\t// If there is no DOM root we do not care about fillers.\n\t\tif ( !this.domConverter.mapViewToDom( selectionParent.root ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( !( selectionParent.is( 'element' ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Prevent adding inline filler inside elements with contenteditable=false.\n\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/1170\n\t\tif ( !isEditable( selectionParent ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// We have block filler, we do not need inline one.\n\t\tif ( selectionOffset === selectionParent.getFillerOffset() ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst nodeBefore = selectionPosition.nodeBefore;\n\t\tconst nodeAfter = selectionPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof ViewText || nodeAfter instanceof ViewText ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks if text needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} viewText View text to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateText( viewText, options ) {\n\t\tconst domText = this.domConverter.findCorrespondingDomText( viewText );\n\t\tconst newDomText = this.domConverter.viewToDom( viewText, domText.ownerDocument );\n\n\t\tconst actualText = domText.data;\n\t\tlet expectedText = newDomText.data;\n\n\t\tconst filler = options.inlineFillerPosition;\n\n\t\tif ( filler && filler.parent == viewText.parent && filler.offset == viewText.index ) {\n\t\t\texpectedText = INLINE_FILLER + expectedText;\n\t\t}\n\n\t\tif ( actualText != expectedText ) {\n\t\t\tconst actions = fastDiff( actualText, expectedText );\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action.type === 'insert' ) {\n\t\t\t\t\tdomText.insertData( action.index, action.values.join( '' ) );\n\t\t\t\t} else { // 'delete'\n\t\t\t\t\tdomText.deleteData( action.index, action.howMany );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if attribute list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement The view element to update.\n\t */\n\t_updateAttrs( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that 'viewElement' is outdated as its mapping was updated\n\t\t\t// in 'this._updateChildrenMappings()'. There is no need to process it as new view element which\n\t\t\t// replaced old 'viewElement' mapping was also added to 'this.markedAttributes'\n\t\t\t// in 'this._updateChildrenMappings()' so it will be processed separately.\n\t\t\treturn;\n\t\t}\n\n\t\tconst domAttrKeys = Array.from( domElement.attributes ).map( attr => attr.name );\n\t\tconst viewAttrKeys = viewElement.getAttributeKeys();\n\n\t\t// Add or overwrite attributes.\n\t\tfor ( const key of viewAttrKeys ) {\n\t\t\tdomElement.setAttribute( key, viewElement.getAttribute( key ) );\n\t\t}\n\n\t\t// Remove from DOM attributes which do not exists in the view.\n\t\tfor ( const key of domAttrKeys ) {\n\t\t\tif ( !viewElement.hasAttribute( key ) ) {\n\t\t\t\tdomElement.removeAttribute( key );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if elements child list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement View element to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateChildren( viewElement, options ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM.\n\t\t\t// There is no need to process it. It will be processed when re-inserted.\n\t\t\treturn;\n\t\t}\n\n\t\tconst inlineFillerPosition = options.inlineFillerPosition;\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { bind: true, inlineFillerPosition } )\n\t\t);\n\n\t\t// Inline filler element has to be created as it is present in the DOM, but not in the view. It is required\n\t\t// during diffing so text nodes could be compared correctly and also during rendering to maintain\n\t\t// proper order and indexes while updating the DOM.\n\t\tif ( inlineFillerPosition && inlineFillerPosition.parent === viewElement ) {\n\t\t\taddInlineFiller( domElement.ownerDocument, expectedDomChildren, inlineFillerPosition.offset );\n\t\t}\n\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\n\t\tlet i = 0;\n\t\tconst nodesToUnbind = new Set();\n\n\t\t// Handle deletions first.\n\t\t// This is to prevent a situation where an element that already exists in `actualDomChildren` is inserted at a different\n\t\t// index in `actualDomChildren`. Since `actualDomChildren` is a `NodeList`, this works like move, not like an insert,\n\t\t// and it disrupts the whole algorithm. See https://github.com/ckeditor/ckeditor5/issues/6367.\n\t\t//\n\t\t// It doesn't matter in what order we remove or add nodes, as long as we remove and add correct nodes at correct indexes.\n\t\tfor ( const action of diff ) {\n\t\t\tif ( action === 'delete' ) {\n\t\t\t\tnodesToUnbind.add( actualDomChildren[ i ] );\n\t\t\t\tremove( actualDomChildren[ i ] );\n\t\t\t} else if ( action === 'equal' ) {\n\t\t\t\ti++;\n\t\t\t}\n\t\t}\n\n\t\ti = 0;\n\n\t\tfor ( const action of diff ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\tinsertAt( domElement, i, expectedDomChildren[ i ] );\n\t\t\t\ti++;\n\t\t\t} else if ( action === 'equal' ) {\n\t\t\t\t// Force updating text nodes inside elements which did not change and do not need to be re-rendered (#1125).\n\t\t\t\t// Do it here (not in the loop above) because only after insertions the `i` index is correct.\n\t\t\t\tthis._markDescendantTextToSync( this.domConverter.domToView( expectedDomChildren[ i ] ) );\n\t\t\t\ti++;\n\t\t\t}\n\t\t}\n\n\t\t// Unbind removed nodes. When node does not have a parent it means that it was removed from DOM tree during\n\t\t// comparison with the expected DOM. We don't need to check child nodes, because if child node was reinserted,\n\t\t// it was moved to DOM tree out of the removed node.\n\t\tfor ( const node of nodesToUnbind ) {\n\t\t\tif ( !node.parentNode ) {\n\t\t\t\tthis.domConverter.unbindDomElement( node );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Shorthand for diffing two arrays or node lists of DOM nodes.\n\t *\n\t * @private\n\t * @param {Array.|NodeList} actualDomChildren Actual DOM children\n\t * @param {Array.|NodeList} expectedDomChildren Expected DOM children.\n\t * @returns {Array.} The list of actions based on the {@link module:utils/diff~diff} function.\n\t */\n\t_diffNodeLists( actualDomChildren, expectedDomChildren ) {\n\t\tactualDomChildren = filterOutFakeSelectionContainer( actualDomChildren, this._fakeSelectionContainer );\n\n\t\treturn diff( actualDomChildren, expectedDomChildren, sameNodes.bind( null, this.domConverter ) );\n\t}\n\n\t/**\n\t * Finds DOM nodes that were replaced with the similar nodes (same tag name) in the view. All nodes are compared\n\t * within one `insert`/`delete` action group, for example:\n\t *\n\t * \t\tActual DOM:\t\t

FooBarBazBax

\n\t * \t\tExpected DOM:\t

Bar123Baz456

\n\t * \t\tInput actions:\t[ insert, insert, delete, delete, equal, insert, delete ]\n\t * \t\tOutput actions:\t[ insert, replace, delete, equal, replace ]\n\t *\n\t * @private\n\t * @param {Array.} actions Actions array which is a result of the {@link module:utils/diff~diff} function.\n\t * @param {Array.|NodeList} actualDom Actual DOM children\n\t * @param {Array.} expectedDom Expected DOM children.\n\t * @returns {Array.} Actions array modified with the `replace` actions.\n\t */\n\t_findReplaceActions( actions, actualDom, expectedDom ) {\n\t\t// If there is no both 'insert' and 'delete' actions, no need to check for replaced elements.\n\t\tif ( actions.indexOf( 'insert' ) === -1 || actions.indexOf( 'delete' ) === -1 ) {\n\t\t\treturn actions;\n\t\t}\n\n\t\tlet newActions = [];\n\t\tlet actualSlice = [];\n\t\tlet expectedSlice = [];\n\n\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\tfor ( const action of actions ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\texpectedSlice.push( expectedDom[ counter.equal + counter.insert ] );\n\t\t\t} else if ( action === 'delete' ) {\n\t\t\t\tactualSlice.push( actualDom[ counter.equal + counter.delete ] );\n\t\t\t} else { // equal\n\t\t\t\tnewActions = newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t\t\t\tnewActions.push( 'equal' );\n\t\t\t\t// Reset stored elements on 'equal'.\n\t\t\t\tactualSlice = [];\n\t\t\t\texpectedSlice = [];\n\t\t\t}\n\t\t\tcounter[ action ]++;\n\t\t}\n\n\t\treturn newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t}\n\n\t/**\n\t * Marks text nodes to be synchronized.\n\t *\n\t * If a text node is passed, it will be marked. If an element is passed, all descendant text nodes inside it will be marked.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewNode View node to sync.\n\t */\n\t_markDescendantTextToSync( viewNode ) {\n\t\tif ( !viewNode ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( viewNode.is( '$text' ) ) {\n\t\t\tthis.markedTexts.add( viewNode );\n\t\t} else if ( viewNode.is( 'element' ) ) {\n\t\t\tfor ( const child of viewNode.getChildren() ) {\n\t\t\t\tthis._markDescendantTextToSync( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if the selection needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateSelection() {\n\t\t// If there is no selection - remove DOM and fake selections.\n\t\tif ( this.selection.rangeCount === 0 ) {\n\t\t\tthis._removeDomSelection();\n\t\t\tthis._removeFakeSelection();\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst domRoot = this.domConverter.mapViewToDom( this.selection.editableElement );\n\n\t\t// Do nothing if there is no focus, or there is no DOM element corresponding to selection's editable element.\n\t\tif ( !this.isFocused || !domRoot ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Render selection.\n\t\tif ( this.selection.isFake ) {\n\t\t\tthis._updateFakeSelection( domRoot );\n\t\t} else {\n\t\t\tthis._removeFakeSelection();\n\t\t\tthis._updateDomSelection( domRoot );\n\t\t}\n\t}\n\n\t/**\n\t * Updates the fake selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the fake selection container should be added.\n\t */\n\t_updateFakeSelection( domRoot ) {\n\t\tconst domDocument = domRoot.ownerDocument;\n\n\t\tif ( !this._fakeSelectionContainer ) {\n\t\t\tthis._fakeSelectionContainer = createFakeSelectionContainer( domDocument );\n\t\t}\n\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\t// Bind fake selection container with the current selection *position*.\n\t\tthis.domConverter.bindFakeSelection( container, this.selection );\n\n\t\tif ( !this._fakeSelectionNeedsUpdate( domRoot ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !container.parentElement || container.parentElement != domRoot ) {\n\t\t\tdomRoot.appendChild( container );\n\t\t}\n\n\t\tcontainer.textContent = this.selection.fakeSelectionLabel || '\\u00A0';\n\n\t\tconst domSelection = domDocument.getSelection();\n\t\tconst domRange = domDocument.createRange();\n\n\t\tdomSelection.removeAllRanges();\n\t\tdomRange.selectNodeContents( container );\n\t\tdomSelection.addRange( domRange );\n\t}\n\n\t/**\n\t * Updates the DOM selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the DOM selection should be rendered.\n\t */\n\t_updateDomSelection( domRoot ) {\n\t\tconst domSelection = domRoot.ownerDocument.defaultView.getSelection();\n\n\t\t// Let's check whether DOM selection needs updating at all.\n\t\tif ( !this._domSelectionNeedsUpdate( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Multi-range selection is not available in most browsers, and, at least in Chrome, trying to\n\t\t// set such selection, that is not continuous, throws an error. Because of that, we will just use anchor\n\t\t// and focus of view selection.\n\t\t// Since we are not supporting multi-range selection, we also do not need to check if proper editable is\n\t\t// selected. If there is any editable selected, it is okay (editable is taken from selection anchor).\n\t\tconst anchor = this.domConverter.viewPositionToDom( this.selection.anchor );\n\t\tconst focus = this.domConverter.viewPositionToDom( this.selection.focus );\n\n\t\tdomSelection.collapse( anchor.parent, anchor.offset );\n\t\tdomSelection.extend( focus.parent, focus.offset );\n\n\t\t// Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n\t\tif ( env.isGecko ) {\n\t\t\tfixGeckoSelectionAfterBr( focus, domSelection );\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether a given DOM selection needs to be updated.\n\t *\n\t * @private\n\t * @param {Selection} domSelection The DOM selection to check.\n\t * @returns {Boolean}\n\t */\n\t_domSelectionNeedsUpdate( domSelection ) {\n\t\tif ( !this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\t// Current DOM selection is in incorrect position. We need to update it.\n\t\t\treturn true;\n\t\t}\n\n\t\tconst oldViewSelection = domSelection && this.domConverter.domSelectionToView( domSelection );\n\n\t\tif ( oldViewSelection && this.selection.isEqual( oldViewSelection ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If selection is not collapsed, it does not need to be updated if it is similar.\n\t\tif ( !this.selection.isCollapsed && this.selection.isSimilar( oldViewSelection ) ) {\n\t\t\t// Selection did not changed and is correct, do not update.\n\t\t\treturn false;\n\t\t}\n\n\t\t// Selections are not similar.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether the fake selection needs to be updated.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where a new fake selection container should be added.\n\t * @returns {Boolean}\n\t */\n\t_fakeSelectionNeedsUpdate( domRoot ) {\n\t\tconst container = this._fakeSelectionContainer;\n\t\tconst domSelection = domRoot.ownerDocument.getSelection();\n\n\t\t// Fake selection needs to be updated if there's no fake selection container, or the container currently sits\n\t\t// in a different root.\n\t\tif ( !container || container.parentElement !== domRoot ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Make sure that the selection actually is within the fake selection.\n\t\tif ( domSelection.anchorNode !== container && !container.contains( domSelection.anchorNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn container.textContent !== this.selection.fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Removes the DOM selection.\n\t *\n\t * @private\n\t */\n\t_removeDomSelection() {\n\t\tfor ( const doc of this.domDocuments ) {\n\t\t\tconst domSelection = doc.getSelection();\n\n\t\t\tif ( domSelection.rangeCount ) {\n\t\t\t\tconst activeDomElement = doc.activeElement;\n\t\t\t\tconst viewElement = this.domConverter.mapDomToView( activeDomElement );\n\n\t\t\t\tif ( activeDomElement && viewElement ) {\n\t\t\t\t\tdoc.getSelection().removeAllRanges();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Removes the fake selection.\n\t *\n\t * @private\n\t */\n\t_removeFakeSelection() {\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\tif ( container ) {\n\t\t\tcontainer.remove();\n\t\t}\n\t}\n\n\t/**\n\t * Checks if focus needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateFocus() {\n\t\tif ( this.isFocused ) {\n\t\t\tconst editable = this.selection.editableElement;\n\n\t\t\tif ( editable ) {\n\t\t\t\tthis.domConverter.focus( editable );\n\t\t\t}\n\t\t}\n\t}\n}\n\nmix( Renderer, ObservableMixin );\n\n// Checks if provided element is editable.\n//\n// @private\n// @param {module:engine/view/element~Element} element\n// @returns {Boolean}\nfunction isEditable( element ) {\n\tif ( element.getAttribute( 'contenteditable' ) == 'false' ) {\n\t\treturn false;\n\t}\n\n\tconst parent = element.findAncestor( element => element.hasAttribute( 'contenteditable' ) );\n\n\treturn !parent || parent.getAttribute( 'contenteditable' ) == 'true';\n}\n\n// Adds inline filler at a given position.\n//\n// The position can be given as an array of DOM nodes and an offset in that array,\n// or a DOM parent element and an offset in that element.\n//\n// @private\n// @param {Document} domDocument\n// @param {Element|Array.} domParentOrArray\n// @param {Number} offset\n// @returns {Text} The DOM text node that contains an inline filler.\nfunction addInlineFiller( domDocument, domParentOrArray, offset ) {\n\tconst childNodes = domParentOrArray instanceof Array ? domParentOrArray : domParentOrArray.childNodes;\n\tconst nodeAfterFiller = childNodes[ offset ];\n\n\tif ( isText( nodeAfterFiller ) ) {\n\t\tnodeAfterFiller.data = INLINE_FILLER + nodeAfterFiller.data;\n\n\t\treturn nodeAfterFiller;\n\t} else {\n\t\tconst fillerNode = domDocument.createTextNode( INLINE_FILLER );\n\n\t\tif ( Array.isArray( domParentOrArray ) ) {\n\t\t\tchildNodes.splice( offset, 0, fillerNode );\n\t\t} else {\n\t\t\tinsertAt( domParentOrArray, offset, fillerNode );\n\t\t}\n\n\t\treturn fillerNode;\n\t}\n}\n\n// Whether two DOM nodes should be considered as similar.\n// Nodes are considered similar if they have the same tag name.\n//\n// @private\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction areSimilar( node1, node2 ) {\n\treturn isNode( node1 ) && isNode( node2 ) &&\n\t\t!isText( node1 ) && !isText( node2 ) &&\n\t\tnode1.nodeType !== Node.COMMENT_NODE && node2.nodeType !== Node.COMMENT_NODE &&\n\t\tnode1.tagName.toLowerCase() === node2.tagName.toLowerCase();\n}\n\n// Whether two dom nodes should be considered as the same.\n// Two nodes which are considered the same are:\n//\n//\t\t* Text nodes with the same text.\n//\t\t* Element nodes represented by the same object.\n//\t\t* Two block filler elements.\n//\n// @private\n// @param {String} blockFillerMode Block filler mode, see {@link module:engine/view/domconverter~DomConverter#blockFillerMode}.\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction sameNodes( domConverter, actualDomChild, expectedDomChild ) {\n\t// Elements.\n\tif ( actualDomChild === expectedDomChild ) {\n\t\treturn true;\n\t}\n\t// Texts.\n\telse if ( isText( actualDomChild ) && isText( expectedDomChild ) ) {\n\t\treturn actualDomChild.data === expectedDomChild.data;\n\t}\n\t// Block fillers.\n\telse if ( domConverter.isBlockFiller( actualDomChild ) &&\n\t\tdomConverter.isBlockFiller( expectedDomChild ) ) {\n\t\treturn true;\n\t}\n\n\t// Not matching types.\n\treturn false;\n}\n\n// The following is a Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n// When the native DOM selection is at the end of the block and preceded by
e.g.\n//\n//\t\t

foo
[]

\n//\n// which happens a lot when using the soft line break, the browser fails to (visually) move the\n// caret to the new line. A quick fix is as simple as force–refreshing the selection with the same range.\nfunction fixGeckoSelectionAfterBr( focus, domSelection ) {\n\tconst parent = focus.parent;\n\n\t// This fix works only when the focus point is at the very end of an element.\n\t// There is no point in running it in cases unrelated to the browser bug.\n\tif ( parent.nodeType != Node.ELEMENT_NODE || focus.offset != parent.childNodes.length - 1 ) {\n\t\treturn;\n\t}\n\n\tconst childAtOffset = parent.childNodes[ focus.offset ];\n\n\t// To stay on the safe side, the fix being as specific as possible, it targets only the\n\t// selection which is at the very end of the element and preceded by
.\n\tif ( childAtOffset && childAtOffset.tagName == 'BR' ) {\n\t\tdomSelection.addRange( domSelection.getRangeAt( 0 ) );\n\t}\n}\n\nfunction filterOutFakeSelectionContainer( domChildList, fakeSelectionContainer ) {\n\tconst childList = Array.from( domChildList );\n\n\tif ( childList.length == 0 || !fakeSelectionContainer ) {\n\t\treturn childList;\n\t}\n\n\tconst last = childList[ childList.length - 1 ];\n\n\tif ( last == fakeSelectionContainer ) {\n\t\tchildList.pop();\n\t}\n\n\treturn childList;\n}\n\n// Creates a fake selection container for a given document.\n//\n// @private\n// @param {Document} domDocument\n// @returns {HTMLElement}\nfunction createFakeSelectionContainer( domDocument ) {\n\tconst container = domDocument.createElement( 'div' );\n\n\tcontainer.className = 'ck-fake-selection-container';\n\n\tObject.assign( container.style, {\n\t\tposition: 'fixed',\n\t\ttop: 0,\n\t\tleft: '-9999px',\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/752.\n\t\twidth: '42px'\n\t} );\n\n\t// Fill it with a text node so we can update it later.\n\tcontainer.textContent = '\\u00A0';\n\n\treturn container;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window, document */\n\n/**\n * @module utils/dom/global\n */\n\n/**\n * A helper (module) giving an access to the global DOM objects such as `window` and\n * `document`. Accessing these objects using this helper allows easy and bulletproof\n * testing, i.e. stubbing native properties:\n *\n *\t\timport global from 'ckeditor5/utils/dom/global.js';\n *\n *\t\t// This stub will work for any code using global module.\n *\t\ttestUtils.sinon.stub( global, 'window', {\n *\t\t\tinnerWidth: 10000\n *\t\t} );\n *\n *\t\tconsole.log( global.window.innerWidth );\n */\nexport default { window, document };\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/indexof\n */\n\n/**\n * Returns index of the node in the parent element.\n *\n * @param {Node} node Node which index is tested.\n * @returns {Number} Index of the node in the parent element. Returns 0 if node has no parent.\n */\nexport default function indexOf( node ) {\n\tlet index = 0;\n\n\twhile ( node.previousSibling ) {\n\t\tnode = node.previousSibling;\n\t\tindex++;\n\t}\n\n\treturn index;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module utils/dom/getancestors\n */\n\n/**\n * Returns all ancestors of given DOM node, starting from the top-most (root). Includes the given node itself. If the\n * node is a part of `DocumentFragment` that `DocumentFragment` will be returned. In contrary, if the node is\n * appended to a `Document`, that `Document` will not be returned (algorithms operating on DOM tree care for `Document#documentElement`\n * at most, which will be returned).\n *\n * @param {Node} node DOM node.\n * @returns {Array.} Array of given `node` parents.\n */\nexport default function getAncestors( node ) {\n\tconst nodes = [];\n\n\t// We are interested in `Node`s `DocumentFragment`s only.\n\twhile ( node && node.nodeType != Node.DOCUMENT_NODE ) {\n\t\tnodes.unshift( node );\n\t\tnode = node.parentNode;\n\t}\n\n\treturn nodes;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/domconverter\n */\n\n/* globals document, Node, NodeFilter, Text */\n\nimport ViewText from './text';\nimport ViewElement from './element';\nimport ViewPosition from './position';\nimport ViewRange from './range';\nimport ViewSelection from './selection';\nimport ViewDocumentFragment from './documentfragment';\nimport ViewTreeWalker from './treewalker';\nimport Matcher from './matcher';\nimport {\n\tBR_FILLER, INLINE_FILLER_LENGTH, NBSP_FILLER, MARKED_NBSP_FILLER,\n\tgetDataWithoutFiller, isInlineFiller, startsWithFiller\n} from './filler';\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport indexOf from '@ckeditor/ckeditor5-utils/src/dom/indexof';\nimport getAncestors from '@ckeditor/ckeditor5-utils/src/dom/getancestors';\nimport getCommonAncestor from '@ckeditor/ckeditor5-utils/src/dom/getcommonancestor';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport { isElement } from 'lodash-es';\n\nconst BR_FILLER_REF = BR_FILLER( document ); // eslint-disable-line new-cap\nconst NBSP_FILLER_REF = NBSP_FILLER( document ); // eslint-disable-line new-cap\nconst MARKED_NBSP_FILLER_REF = MARKED_NBSP_FILLER( document ); // eslint-disable-line new-cap\n\n/**\n * `DomConverter` is a set of tools to do transformations between DOM nodes and view nodes. It also handles\n * {@link module:engine/view/domconverter~DomConverter#bindElements bindings} between these nodes.\n *\n * An instance of the DOM converter is available under\n * {@link module:engine/view/view~View#domConverter `editor.editing.view.domConverter`}.\n *\n * The DOM converter does not check which nodes should be rendered (use {@link module:engine/view/renderer~Renderer}), does not keep the\n * state of a tree nor keeps the synchronization between the tree view and the DOM tree (use {@link module:engine/view/document~Document}).\n *\n * The DOM converter keeps DOM elements to view element bindings, so when the converter gets destroyed, the bindings are lost.\n * Two converters will keep separate binding maps, so one tree view can be bound with two DOM trees.\n */\nexport default class DomConverter {\n\t/**\n\t * Creates a DOM converter.\n\t *\n\t * @param {module:engine/view/document~Document} document The view document instance.\n\t * @param {Object} options An object with configuration options.\n\t * @param {module:engine/view/filler~BlockFillerMode} [options.blockFillerMode='br'] The type of the block filler to use.\n\t */\n\tconstructor( document, options = {} ) {\n\t\t/**\n\t\t * @readonly\n\t\t * @type {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = document;\n\n\t\t/**\n\t\t * The mode of a block filler used by the DOM converter.\n\t\t *\n\t\t * @member {'br'|'nbsp'|'markedNbsp'} module:engine/view/domconverter~DomConverter#blockFillerMode\n\t\t */\n\t\tthis.blockFillerMode = options.blockFillerMode || 'br';\n\n\t\t/**\n\t\t * Elements which are considered pre-formatted elements.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.} module:engine/view/domconverter~DomConverter#preElements\n\t\t */\n\t\tthis.preElements = [ 'pre' ];\n\n\t\t/**\n\t\t * Elements which are considered block elements (and hence should be filled with a\n\t\t * {@link #isBlockFiller block filler}).\n\t\t *\n\t\t * Whether an element is considered a block element also affects handling of trailing whitespaces.\n\t\t *\n\t\t * You can extend this array if you introduce support for block elements which are not yet recognized here.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.} module:engine/view/domconverter~DomConverter#blockElements\n\t\t */\n\t\tthis.blockElements = [ 'p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'li', 'dd', 'dt', 'figcaption', 'td', 'th' ];\n\n\t\t/**\n\t\t * The DOM-to-view mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_domToViewMapping\n\t\t */\n\t\tthis._domToViewMapping = new WeakMap();\n\n\t\t/**\n\t\t * The view-to-DOM mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_viewToDomMapping\n\t\t */\n\t\tthis._viewToDomMapping = new WeakMap();\n\n\t\t/**\n\t\t * Holds the mapping between fake selection containers and corresponding view selections.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_fakeSelectionMapping\n\t\t */\n\t\tthis._fakeSelectionMapping = new WeakMap();\n\n\t\t/**\n\t\t * Matcher for view elements whose content should be treated as raw data\n\t\t * and not processed during the conversion from DOM nodes to view elements.\n\t\t *\n\t\t * @private\n\t\t * @type {module:engine/view/matcher~Matcher}\n\t\t */\n\t\tthis._rawContentElementMatcher = new Matcher();\n\n\t\t/**\n\t\t * A set of encountered raw content DOM nodes. It is used for preventing left trimming of the following text node.\n\t\t *\n\t\t * @private\n\t\t * @type {WeakSet.}\n\t\t */\n\t\tthis._encounteredRawContentDomNodes = new WeakSet();\n\t}\n\n\t/**\n\t * Binds a given DOM element that represents fake selection to a **position** of a\n\t * {@link module:engine/view/documentselection~DocumentSelection document selection}.\n\t * Document selection copy is stored and can be retrieved by the\n\t * {@link module:engine/view/domconverter~DomConverter#fakeSelectionToView} method.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @param {module:engine/view/documentselection~DocumentSelection} viewDocumentSelection\n\t */\n\tbindFakeSelection( domElement, viewDocumentSelection ) {\n\t\tthis._fakeSelectionMapping.set( domElement, new ViewSelection( viewDocumentSelection ) );\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/selection~Selection view selection} instance corresponding to a given\n\t * DOM element that represents fake selection. Returns `undefined` if binding to the given DOM element does not exist.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @returns {module:engine/view/selection~Selection|undefined}\n\t */\n\tfakeSelectionToView( domElement ) {\n\t\treturn this._fakeSelectionMapping.get( domElement );\n\t}\n\n\t/**\n\t * Binds DOM and view elements, so it will be possible to get corresponding elements using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {HTMLElement} domElement The DOM element to bind.\n\t * @param {module:engine/view/element~Element} viewElement The view element to bind.\n\t */\n\tbindElements( domElement, viewElement ) {\n\t\tthis._domToViewMapping.set( domElement, viewElement );\n\t\tthis._viewToDomMapping.set( viewElement, domElement );\n\t}\n\n\t/**\n\t * Unbinds a given DOM element from the view element it was bound to. Unbinding is deep, meaning that all children of\n\t * the DOM element will be unbound too.\n\t *\n\t * @param {HTMLElement} domElement The DOM element to unbind.\n\t */\n\tunbindDomElement( domElement ) {\n\t\tconst viewElement = this._domToViewMapping.get( domElement );\n\n\t\tif ( viewElement ) {\n\t\t\tthis._domToViewMapping.delete( domElement );\n\t\t\tthis._viewToDomMapping.delete( viewElement );\n\n\t\t\tfor ( const child of domElement.childNodes ) {\n\t\t\t\tthis.unbindDomElement( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Binds DOM and view document fragments, so it will be possible to get corresponding document fragments using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {DocumentFragment} domFragment The DOM document fragment to bind.\n\t * @param {module:engine/view/documentfragment~DocumentFragment} viewFragment The view document fragment to bind.\n\t */\n\tbindDocumentFragments( domFragment, viewFragment ) {\n\t\tthis._domToViewMapping.set( domFragment, viewFragment );\n\t\tthis._viewToDomMapping.set( viewFragment, domFragment );\n\t}\n\n\t/**\n\t * Converts the view to the DOM. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments the method will return corresponding items.\n\t *\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View node or document fragment to transform.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @returns {Node|DocumentFragment} Converted node or DocumentFragment.\n\t */\n\tviewToDom( viewNode, domDocument, options = {} ) {\n\t\tif ( viewNode.is( '$text' ) ) {\n\t\t\tconst textData = this._processDataFromViewText( viewNode );\n\n\t\t\treturn domDocument.createTextNode( textData );\n\t\t} else {\n\t\t\tif ( this.mapViewToDom( viewNode ) ) {\n\t\t\t\treturn this.mapViewToDom( viewNode );\n\t\t\t}\n\n\t\t\tlet domElement;\n\n\t\t\tif ( viewNode.is( 'documentFragment' ) ) {\n\t\t\t\t// Create DOM document fragment.\n\t\t\t\tdomElement = domDocument.createDocumentFragment();\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domElement, viewNode );\n\t\t\t\t}\n\t\t\t} else if ( viewNode.is( 'uiElement' ) ) {\n\t\t\t\t// UIElement has its own render() method (see #799).\n\t\t\t\tdomElement = viewNode.render( domDocument );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\treturn domElement;\n\t\t\t} else {\n\t\t\t\t// Create DOM element.\n\t\t\t\tif ( viewNode.hasAttribute( 'xmlns' ) ) {\n\t\t\t\t\tdomElement = domDocument.createElementNS( viewNode.getAttribute( 'xmlns' ), viewNode.name );\n\t\t\t\t} else {\n\t\t\t\t\tdomElement = domDocument.createElement( viewNode.name );\n\t\t\t\t}\n\n\t\t\t\t// RawElement take care of their children in RawElement#render() method which can be customized\n\t\t\t\t// (see https://github.com/ckeditor/ckeditor5/issues/4469).\n\t\t\t\tif ( viewNode.is( 'rawElement' ) ) {\n\t\t\t\t\tviewNode.render( domElement );\n\t\t\t\t}\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tfor ( const key of viewNode.getAttributeKeys() ) {\n\t\t\t\t\tdomElement.setAttribute( key, viewNode.getAttribute( key ) );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren !== false ) {\n\t\t\t\tfor ( const child of this.viewChildrenToDom( viewNode, domDocument, options ) ) {\n\t\t\t\t\tdomElement.appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn domElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the view element to DOM using the\n\t * {@link module:engine/view/domconverter~DomConverter#viewToDom} method.\n\t * Additionally, this method adds block {@link module:engine/view/filler filler} to the list of children, if needed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewElement Parent view element.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#viewToDom} options parameter.\n\t * @returns {Iterable.} DOM nodes.\n\t */\n\t* viewChildrenToDom( viewElement, domDocument, options = {} ) {\n\t\tconst fillerPositionOffset = viewElement.getFillerOffset && viewElement.getFillerOffset();\n\t\tlet offset = 0;\n\n\t\tfor ( const childView of viewElement.getChildren() ) {\n\t\t\tif ( fillerPositionOffset === offset ) {\n\t\t\t\tyield this._getBlockFiller( domDocument );\n\t\t\t}\n\n\t\t\tyield this.viewToDom( childView, domDocument, options );\n\n\t\t\toffset++;\n\t\t}\n\n\t\tif ( fillerPositionOffset === offset ) {\n\t\t\tyield this._getBlockFiller( domDocument );\n\t\t}\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/range~Range} to DOM range.\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t *\n\t * @param {module:engine/view/range~Range} viewRange View range.\n\t * @returns {Range} DOM range.\n\t */\n\tviewRangeToDom( viewRange ) {\n\t\tconst domStart = this.viewPositionToDom( viewRange.start );\n\t\tconst domEnd = this.viewPositionToDom( viewRange.end );\n\n\t\tconst domRange = document.createRange();\n\t\tdomRange.setStart( domStart.parent, domStart.offset );\n\t\tdomRange.setEnd( domEnd.parent, domEnd.offset );\n\n\t\treturn domRange;\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/position~Position} to DOM parent and offset.\n\t *\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t * If the converted position is directly before inline filler it is moved inside the filler.\n\t *\n\t * @param {module:engine/view/position~Position} viewPosition View position.\n\t * @returns {Object|null} position DOM position or `null` if view position could not be converted to DOM.\n\t * @returns {Node} position.parent DOM position parent.\n\t * @returns {Number} position.offset DOM position offset.\n\t */\n\tviewPositionToDom( viewPosition ) {\n\t\tconst viewParent = viewPosition.parent;\n\n\t\tif ( viewParent.is( '$text' ) ) {\n\t\t\tconst domParent = this.findCorrespondingDomText( viewParent );\n\n\t\t\tif ( !domParent ) {\n\t\t\t\t// Position is in a view text node that has not been rendered to DOM yet.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tlet offset = viewPosition.offset;\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset += INLINE_FILLER_LENGTH;\n\t\t\t}\n\n\t\t\treturn { parent: domParent, offset };\n\t\t} else {\n\t\t\t// viewParent is instance of ViewElement.\n\t\t\tlet domParent, domBefore, domAfter;\n\n\t\t\tif ( viewPosition.offset === 0 ) {\n\t\t\t\tdomParent = this.mapViewToDom( viewParent );\n\n\t\t\t\tif ( !domParent ) {\n\t\t\t\t\t// Position is in a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomAfter = domParent.childNodes[ 0 ];\n\t\t\t} else {\n\t\t\t\tconst nodeBefore = viewPosition.nodeBefore;\n\n\t\t\t\tdomBefore = nodeBefore.is( '$text' ) ?\n\t\t\t\t\tthis.findCorrespondingDomText( nodeBefore ) :\n\t\t\t\t\tthis.mapViewToDom( viewPosition.nodeBefore );\n\n\t\t\t\tif ( !domBefore ) {\n\t\t\t\t\t// Position is after a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomParent = domBefore.parentNode;\n\t\t\t\tdomAfter = domBefore.nextSibling;\n\t\t\t}\n\n\t\t\t// If there is an inline filler at position return position inside the filler. We should never return\n\t\t\t// the position before the inline filler.\n\t\t\tif ( isText( domAfter ) && startsWithFiller( domAfter ) ) {\n\t\t\t\treturn { parent: domAfter, offset: INLINE_FILLER_LENGTH };\n\t\t\t}\n\n\t\t\tconst offset = domBefore ? indexOf( domBefore ) + 1 : 0;\n\n\t\t\treturn { parent: domParent, offset };\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM to view. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments function will return corresponding items. For\n\t * {@link module:engine/view/filler fillers} `null` will be returned.\n\t * For all DOM elements rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * @param {Node|DocumentFragment} domNode DOM node or document fragment to transform.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @param {Boolean} [options.keepOriginalCase=false] If `false`, node's tag name will be converter to lower case.\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null} Converted node or document fragment\n\t * or `null` if DOM node is a {@link module:engine/view/filler filler} or the given node is an empty text node.\n\t */\n\tdomToView( domNode, options = {} ) {\n\t\tif ( this.isBlockFiller( domNode ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// When node is inside a UIElement or a RawElement return that parent as it's view representation.\n\t\tconst hostElement = this.getHostViewElement( domNode );\n\n\t\tif ( hostElement ) {\n\t\t\treturn hostElement;\n\t\t}\n\n\t\tif ( isText( domNode ) ) {\n\t\t\tif ( isInlineFiller( domNode ) ) {\n\t\t\t\treturn null;\n\t\t\t} else {\n\t\t\t\tconst textData = this._processDataFromDomText( domNode );\n\n\t\t\t\treturn textData === '' ? null : new ViewText( this.document, textData );\n\t\t\t}\n\t\t} else if ( this.isComment( domNode ) ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\tif ( this.mapDomToView( domNode ) ) {\n\t\t\t\treturn this.mapDomToView( domNode );\n\t\t\t}\n\n\t\t\tlet viewElement;\n\n\t\t\tif ( this.isDocumentFragment( domNode ) ) {\n\t\t\t\t// Create view document fragment.\n\t\t\t\tviewElement = new ViewDocumentFragment( this.document );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domNode, viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// Create view element.\n\t\t\t\tconst viewName = options.keepOriginalCase ? domNode.tagName : domNode.tagName.toLowerCase();\n\t\t\t\tviewElement = new ViewElement( this.document, viewName );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domNode, viewElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tconst attrs = domNode.attributes;\n\n\t\t\t\tfor ( let i = attrs.length - 1; i >= 0; i-- ) {\n\t\t\t\t\tviewElement._setAttribute( attrs[ i ].name, attrs[ i ].value );\n\t\t\t\t}\n\n\t\t\t\t// Treat this element's content as a raw data if it was registered as such.\n\t\t\t\tif ( options.withChildren !== false && this._rawContentElementMatcher.match( viewElement ) ) {\n\t\t\t\t\tviewElement._setCustomProperty( '$rawContent', domNode.innerHTML );\n\n\t\t\t\t\t// Store a DOM node to prevent left trimming of the following text node.\n\t\t\t\t\tthis._encounteredRawContentDomNodes.add( domNode );\n\n\t\t\t\t\treturn viewElement;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren !== false ) {\n\t\t\t\tfor ( const child of this.domChildrenToView( domNode, options ) ) {\n\t\t\t\t\tviewElement._appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn viewElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the DOM element to view nodes using\n\t * the {@link module:engine/view/domconverter~DomConverter#domToView} method.\n\t * Additionally this method omits block {@link module:engine/view/filler filler}, if it exists in the DOM parent.\n\t *\n\t * @param {HTMLElement} domElement Parent DOM element.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#domToView} options parameter.\n\t * @returns {Iterable.} View nodes.\n\t */\n\t* domChildrenToView( domElement, options = {} ) {\n\t\tfor ( let i = 0; i < domElement.childNodes.length; i++ ) {\n\t\t\tconst domChild = domElement.childNodes[ i ];\n\t\t\tconst viewChild = this.domToView( domChild, options );\n\n\t\t\tif ( viewChild !== null ) {\n\t\t\t\tyield viewChild;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM selection to view {@link module:engine/view/selection~Selection}.\n\t * Ranges which cannot be converted will be omitted.\n\t *\n\t * @param {Selection} domSelection DOM selection.\n\t * @returns {module:engine/view/selection~Selection} View selection.\n\t */\n\tdomSelectionToView( domSelection ) {\n\t\t// DOM selection might be placed in fake selection container.\n\t\t// If container contains fake selection - return corresponding view selection.\n\t\tif ( domSelection.rangeCount === 1 ) {\n\t\t\tlet container = domSelection.getRangeAt( 0 ).startContainer;\n\n\t\t\t// The DOM selection might be moved to the text node inside the fake selection container.\n\t\t\tif ( isText( container ) ) {\n\t\t\t\tcontainer = container.parentNode;\n\t\t\t}\n\n\t\t\tconst viewSelection = this.fakeSelectionToView( container );\n\n\t\t\tif ( viewSelection ) {\n\t\t\t\treturn viewSelection;\n\t\t\t}\n\t\t}\n\n\t\tconst isBackward = this.isDomSelectionBackward( domSelection );\n\n\t\tconst viewRanges = [];\n\n\t\tfor ( let i = 0; i < domSelection.rangeCount; i++ ) {\n\t\t\t// DOM Range have correct start and end, no matter what is the DOM Selection direction. So we don't have to fix anything.\n\t\t\tconst domRange = domSelection.getRangeAt( i );\n\t\t\tconst viewRange = this.domRangeToView( domRange );\n\n\t\t\tif ( viewRange ) {\n\t\t\t\tviewRanges.push( viewRange );\n\t\t\t}\n\t\t}\n\n\t\treturn new ViewSelection( viewRanges, { backward: isBackward } );\n\t}\n\n\t/**\n\t * Converts DOM Range to view {@link module:engine/view/range~Range}.\n\t * If the start or end position can not be converted `null` is returned.\n\t *\n\t * @param {Range} domRange DOM range.\n\t * @returns {module:engine/view/range~Range|null} View range.\n\t */\n\tdomRangeToView( domRange ) {\n\t\tconst viewStart = this.domPositionToView( domRange.startContainer, domRange.startOffset );\n\t\tconst viewEnd = this.domPositionToView( domRange.endContainer, domRange.endOffset );\n\n\t\tif ( viewStart && viewEnd ) {\n\t\t\treturn new ViewRange( viewStart, viewEnd );\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Converts DOM parent and offset to view {@link module:engine/view/position~Position}.\n\t *\n\t * If the position is inside a {@link module:engine/view/filler filler} which has no corresponding view node,\n\t * position of the filler will be converted and returned.\n\t *\n\t * If the position is inside DOM element rendered by {@link module:engine/view/uielement~UIElement}\n\t * that position will be converted to view position before that UIElement.\n\t *\n\t * If structures are too different and it is not possible to find corresponding position then `null` will be returned.\n\t *\n\t * @param {Node} domParent DOM position parent.\n\t * @param {Number} domOffset DOM position offset.\n\t * @returns {module:engine/view/position~Position} viewPosition View position.\n\t */\n\tdomPositionToView( domParent, domOffset ) {\n\t\tif ( this.isBlockFiller( domParent ) ) {\n\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t}\n\n\t\t// If position is somewhere inside UIElement or a RawElement - return position before that element.\n\t\tconst viewElement = this.mapDomToView( domParent );\n\n\t\tif ( viewElement && ( viewElement.is( 'uiElement' ) || viewElement.is( 'rawElement' ) ) ) {\n\t\t\treturn ViewPosition._createBefore( viewElement );\n\t\t}\n\n\t\tif ( isText( domParent ) ) {\n\t\t\tif ( isInlineFiller( domParent ) ) {\n\t\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t\t}\n\n\t\t\tconst viewParent = this.findCorrespondingViewText( domParent );\n\t\t\tlet offset = domOffset;\n\n\t\t\tif ( !viewParent ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset -= INLINE_FILLER_LENGTH;\n\t\t\t\toffset = offset < 0 ? 0 : offset;\n\t\t\t}\n\n\t\t\treturn new ViewPosition( viewParent, offset );\n\t\t}\n\t\t// domParent instanceof HTMLElement.\n\t\telse {\n\t\t\tif ( domOffset === 0 ) {\n\t\t\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t\t\tif ( viewParent ) {\n\t\t\t\t\treturn new ViewPosition( viewParent, 0 );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst domBefore = domParent.childNodes[ domOffset - 1 ];\n\t\t\t\tconst viewBefore = isText( domBefore ) ?\n\t\t\t\t\tthis.findCorrespondingViewText( domBefore ) :\n\t\t\t\t\tthis.mapDomToView( domBefore );\n\n\t\t\t\t// TODO #663\n\t\t\t\tif ( viewBefore && viewBefore.parent ) {\n\t\t\t\t\treturn new ViewPosition( viewBefore.parent, viewBefore.index + 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t/**\n\t * Returns corresponding view {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment} for provided DOM element or\n\t * document fragment. If there is no view item {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * to the given DOM - `undefined` is returned.\n\t *\n\t * For all DOM elements rendered by a {@link module:engine/view/uielement~UIElement} or\n\t * a {@link module:engine/view/rawelement~RawElement}, the parent `UIElement` or `RawElement` will be returned.\n\t *\n\t * @param {DocumentFragment|Element} domElementOrDocumentFragment DOM element or document fragment.\n\t * @returns {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|undefined}\n\t * Corresponding view element, document fragment or `undefined` if no element was bound.\n\t */\n\tmapDomToView( domElementOrDocumentFragment ) {\n\t\tconst hostElement = this.getHostViewElement( domElementOrDocumentFragment );\n\n\t\treturn hostElement || this._domToViewMapping.get( domElementOrDocumentFragment );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * For all text nodes rendered by a {@link module:engine/view/uielement~UIElement} or\n\t * a {@link module:engine/view/rawelement~RawElement}, the parent `UIElement` or `RawElement` will be returned.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * Note that for the block or inline {@link module:engine/view/filler filler} this method returns `null`.\n\t *\n\t * @param {Text} domText DOM text node.\n\t * @returns {module:engine/view/text~Text|null} Corresponding view text node or `null`, if it was not possible to find a\n\t * corresponding node.\n\t */\n\tfindCorrespondingViewText( domText ) {\n\t\tif ( isInlineFiller( domText ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// If DOM text was rendered by a UIElement or a RawElement - return this parent element.\n\t\tconst hostElement = this.getHostViewElement( domText );\n\n\t\tif ( hostElement ) {\n\t\t\treturn hostElement;\n\t\t}\n\n\t\tconst previousSibling = domText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling ) {\n\t\t\tif ( !( this.isElement( previousSibling ) ) ) {\n\t\t\t\t// The previous is text or comment.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tconst viewElement = this.mapDomToView( previousSibling );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst nextSibling = viewElement.nextSibling;\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( nextSibling instanceof ViewText ) {\n\t\t\t\t\treturn viewElement.nextSibling;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\t// Try to use parent to find the corresponding text node.\n\t\telse {\n\t\t\tconst viewElement = this.mapDomToView( domText.parentNode );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst firstChild = viewElement.getChild( 0 );\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( firstChild instanceof ViewText ) {\n\t\t\t\t\treturn firstChild;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns corresponding DOM item for provided {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment}.\n\t * To find a corresponding text for {@link module:engine/view/text~Text view Text instance}\n\t * use {@link #findCorrespondingDomText}.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View element or document fragment.\n\t * @returns {Node|DocumentFragment|undefined} Corresponding DOM node or document fragment.\n\t */\n\tmapViewToDom( documentFragmentOrElement ) {\n\t\treturn this._viewToDomMapping.get( documentFragmentOrElement );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * @param {module:engine/view/text~Text} viewText View text node.\n\t * @returns {Text|null} Corresponding DOM text node or `null`, if it was not possible to find a corresponding node.\n\t */\n\tfindCorrespondingDomText( viewText ) {\n\t\tconst previousSibling = viewText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling && this.mapViewToDom( previousSibling ) ) {\n\t\t\treturn this.mapViewToDom( previousSibling ).nextSibling;\n\t\t}\n\n\t\t// If this is a first node, try to use parent to find the corresponding text node.\n\t\tif ( !previousSibling && viewText.parent && this.mapViewToDom( viewText.parent ) ) {\n\t\t\treturn this.mapViewToDom( viewText.parent ).childNodes[ 0 ];\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Focuses DOM editable that is corresponding to provided {@link module:engine/view/editableelement~EditableElement}.\n\t *\n\t * @param {module:engine/view/editableelement~EditableElement} viewEditable\n\t */\n\tfocus( viewEditable ) {\n\t\tconst domEditable = this.mapViewToDom( viewEditable );\n\n\t\tif ( domEditable && domEditable.ownerDocument.activeElement !== domEditable ) {\n\t\t\t// Save the scrollX and scrollY positions before the focus.\n\t\t\tconst { scrollX, scrollY } = global.window;\n\t\t\tconst scrollPositions = [];\n\n\t\t\t// Save all scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst { scrollLeft, scrollTop } = node;\n\n\t\t\t\tscrollPositions.push( [ scrollLeft, scrollTop ] );\n\t\t\t} );\n\n\t\t\tdomEditable.focus();\n\n\t\t\t// Restore scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/957\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst [ scrollLeft, scrollTop ] = scrollPositions.shift();\n\n\t\t\t\tnode.scrollLeft = scrollLeft;\n\t\t\t\tnode.scrollTop = scrollTop;\n\t\t\t} );\n\n\t\t\t// Restore the scrollX and scrollY positions after the focus.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\tglobal.window.scrollTo( scrollX, scrollY );\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.ELEMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisElement( node ) {\n\t\treturn node && node.nodeType == Node.ELEMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.DOCUMENT_FRAGMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisDocumentFragment( node ) {\n\t\treturn node && node.nodeType == Node.DOCUMENT_FRAGMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.COMMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisComment( node ) {\n\t\treturn node && node.nodeType == Node.COMMENT_NODE;\n\t}\n\n\t/**\n\t * Checks if the node is an instance of the block filler for this DOM converter.\n\t *\n\t *\t\tconst converter = new DomConverter( viewDocument, { blockFillerMode: 'br' } );\n\t *\n\t *\t\tconverter.isBlockFiller( BR_FILLER( document ) ); // true\n\t *\t\tconverter.isBlockFiller( NBSP_FILLER( document ) ); // false\n\t *\n\t * **Note:**: For the `'nbsp'` mode the method also checks context of a node so it cannot be a detached node.\n\t *\n\t * **Note:** A special case in the `'nbsp'` mode exists where the `
` in `


` is treated as a block filler.\n\t *\n\t * @param {Node} domNode DOM node to check.\n\t * @returns {Boolean} True if a node is considered a block filler for given mode.\n\t */\n\tisBlockFiller( domNode ) {\n\t\tif ( this.blockFillerMode == 'br' ) {\n\t\t\treturn domNode.isEqualNode( BR_FILLER_REF );\n\t\t}\n\n\t\t// Special case for


in which
should be treated as filler even when we are not in the 'br' mode. See ckeditor5#5564.\n\t\tif ( domNode.tagName === 'BR' && hasBlockParent( domNode, this.blockElements ) && domNode.parentNode.childNodes.length === 1 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// If not in 'br' mode, try recognizing both marked and regular nbsp block fillers.\n\t\treturn domNode.isEqualNode( MARKED_NBSP_FILLER_REF ) || isNbspBlockFiller( domNode, this.blockElements );\n\t}\n\n\t/**\n\t * Returns `true` if given selection is a backward selection, that is, if it's `focus` is before `anchor`.\n\t *\n\t * @param {Selection} DOM Selection instance to check.\n\t * @returns {Boolean}\n\t */\n\tisDomSelectionBackward( selection ) {\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Since it takes multiple lines of code to check whether a \"DOM Position\" is before/after another \"DOM Position\",\n\t\t// we will use the fact that range will collapse if it's end is before it's start.\n\t\tconst range = document.createRange();\n\n\t\trange.setStart( selection.anchorNode, selection.anchorOffset );\n\t\trange.setEnd( selection.focusNode, selection.focusOffset );\n\n\t\tconst backward = range.collapsed;\n\n\t\trange.detach();\n\n\t\treturn backward;\n\t}\n\n\t/**\n\t * Returns a parent {@link module:engine/view/uielement~UIElement} or {@link module:engine/view/rawelement~RawElement}\n\t * that hosts the provided DOM node. Returns `null` if there is no such parent.\n\t *\n\t * @param {Node} domNode\n\t * @returns {module:engine/view/uielement~UIElement|module:engine/view/rawelement~RawElement|null}\n\t */\n\tgetHostViewElement( domNode ) {\n\t\tconst ancestors = getAncestors( domNode );\n\n\t\t// Remove domNode from the list.\n\t\tancestors.pop();\n\n\t\twhile ( ancestors.length ) {\n\t\t\tconst domNode = ancestors.pop();\n\t\t\tconst viewNode = this._domToViewMapping.get( domNode );\n\n\t\t\tif ( viewNode && ( viewNode.is( 'uiElement' ) || viewNode.is( 'rawElement' ) ) ) {\n\t\t\t\treturn viewNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks if the given selection's boundaries are at correct places.\n\t *\n\t * The following places are considered as incorrect for selection boundaries:\n\t *\n\t * * before or in the middle of an inline filler sequence,\n\t * * inside a DOM element which represents {@link module:engine/view/uielement~UIElement a view UI element},\n\t * * inside a DOM element which represents {@link module:engine/view/rawelement~RawElement a view raw element}.\n\t *\n\t * @param {Selection} domSelection The DOM selection object to be checked.\n\t * @returns {Boolean} `true` if the given selection is at a correct place, `false` otherwise.\n\t */\n\tisDomSelectionCorrect( domSelection ) {\n\t\treturn this._isDomSelectionPositionCorrect( domSelection.anchorNode, domSelection.anchorOffset ) &&\n\t\t\tthis._isDomSelectionPositionCorrect( domSelection.focusNode, domSelection.focusOffset );\n\t}\n\n\t/**\n\t * Registers a {@link module:engine/view/matcher~MatcherPattern} for view elements whose content should be treated as raw data\n\t * and not processed during the conversion from DOM nodes to view elements.\n\t *\n\t * This is affecting how {@link module:engine/view/domconverter~DomConverter#domToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#domChildrenToView} process DOM nodes.\n\t *\n\t * The raw data can be later accessed by a\n\t * {@link module:engine/view/element~Element#getCustomProperty custom property of a view element} called `\"$rawContent\"`.\n\t *\n\t * @param {module:engine/view/matcher~MatcherPattern} pattern Pattern matching a view element whose content should\n\t * be treated as raw data.\n\t */\n\tregisterRawContentMatcher( pattern ) {\n\t\tthis._rawContentElementMatcher.add( pattern );\n\t}\n\n\t/**\n\t * Returns block {@link module:engine/view/filler filler} node based on current {@link #blockFillerMode} setting.\n\t *\n\t * @private\n\t * @params {Document} domDocument\n\t * @returns {Node} filler\n\t */\n\t_getBlockFiller( domDocument ) {\n\t\tswitch ( this.blockFillerMode ) {\n\t\t\tcase 'nbsp':\n\t\t\t\treturn NBSP_FILLER( domDocument ); // eslint-disable-line new-cap\n\t\t\tcase 'markedNbsp':\n\t\t\t\treturn MARKED_NBSP_FILLER( domDocument ); // eslint-disable-line new-cap\n\t\t\tcase 'br':\n\t\t\t\treturn BR_FILLER( domDocument ); // eslint-disable-line new-cap\n\t\t}\n\t}\n\n\t/**\n\t * Checks if the given DOM position is a correct place for selection boundary. See {@link #isDomSelectionCorrect}.\n\t *\n\t * @private\n\t * @param {Element} domParent Position parent.\n\t * @param {Number} offset Position offset.\n\t * @returns {Boolean} `true` if given position is at a correct place for selection boundary, `false` otherwise.\n\t */\n\t_isDomSelectionPositionCorrect( domParent, offset ) {\n\t\t// If selection is before or in the middle of inline filler string, it is incorrect.\n\t\tif ( isText( domParent ) && startsWithFiller( domParent ) && offset < INLINE_FILLER_LENGTH ) {\n\t\t\t// Selection in a text node, at wrong position (before or in the middle of filler).\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.isElement( domParent ) && startsWithFiller( domParent.childNodes[ offset ] ) ) {\n\t\t\t// Selection in an element node, before filler text node.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t// The position is incorrect when anchored inside a UIElement or a RawElement.\n\t\t// Note: In case of UIElement and RawElement, mapDomToView() returns a parent element for any DOM child\n\t\t// so there's no need to perform any additional checks.\n\t\tif ( viewParent && ( viewParent.is( 'uiElement' ) || viewParent.is( 'rawElement' ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Takes text data from a given {@link module:engine/view/text~Text#data} and processes it so\n\t * it is correctly displayed in the DOM.\n\t *\n\t * Following changes are done:\n\t *\n\t * * a space at the beginning is changed to ` ` if this is the first text node in its container\n\t * element or if a previous text node ends with a space character,\n\t * * space at the end of the text node is changed to ` ` if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container,\n\t * * remaining spaces are replaced to a chain of spaces and ` ` (e.g. `'x x'` becomes `'x   x'`).\n\t *\n\t * Content of {@link #preElements} is not processed.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node View text node to process.\n\t * @returns {String} Processed text data.\n\t */\n\t_processDataFromViewText( node ) {\n\t\tlet data = node.data;\n\n\t\t// If any of node ancestors has a name which is in `preElements` array, then currently processed\n\t\t// view text node is (will be) in preformatted element. We should not change whitespaces then.\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn data;\n\t\t}\n\n\t\t// 1. Replace the first space with a nbsp if the previous node ends with a space or there is no previous node\n\t\t// (container element boundary).\n\t\tif ( data.charAt( 0 ) == ' ' ) {\n\t\t\tconst prevNode = this._getTouchingViewTextNode( node, false );\n\t\t\tconst prevEndsWithSpace = prevNode && this._nodeEndsWithSpace( prevNode );\n\n\t\t\tif ( prevEndsWithSpace || !prevNode ) {\n\t\t\t\tdata = '\\u00A0' + data.substr( 1 );\n\t\t\t}\n\t\t}\n\n\t\t// 2. Replace the last space with nbsp if there are two spaces at the end or if the next node starts with space or there is no\n\t\t// next node (container element boundary).\n\t\t//\n\t\t// Keep in mind that Firefox prefers $nbsp; before tag, not inside it:\n\t\t//\n\t\t// Foo  bar <-- bad.\n\t\t// Foo  bar <-- good.\n\t\t//\n\t\t// More here: https://github.com/ckeditor/ckeditor5-engine/issues/1747.\n\t\tif ( data.charAt( data.length - 1 ) == ' ' ) {\n\t\t\tconst nextNode = this._getTouchingViewTextNode( node, true );\n\n\t\t\tif ( data.charAt( data.length - 2 ) == ' ' || !nextNode || nextNode.data.charAt( 0 ) == ' ' ) {\n\t\t\t\tdata = data.substr( 0, data.length - 1 ) + '\\u00A0';\n\t\t\t}\n\t\t}\n\n\t\t// 3. Create space+nbsp pairs.\n\t\treturn data.replace( / {2}/g, ' \\u00A0' );\n\t}\n\n\t/**\n\t * Checks whether given node ends with a space character after changing appropriate space characters to ` `s.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node Node to check.\n\t * @returns {Boolean} `true` if given `node` ends with space, `false` otherwise.\n\t */\n\t_nodeEndsWithSpace( node ) {\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst data = this._processDataFromViewText( node );\n\n\t\treturn data.charAt( data.length - 1 ) == ' ';\n\t}\n\n\t/**\n\t * Takes text data from native `Text` node and processes it to a correct {@link module:engine/view/text~Text view text node} data.\n\t *\n\t * Following changes are done:\n\t *\n\t * * multiple whitespaces are replaced to a single space,\n\t * * space at the beginning of a text node is removed if it is the first text node in its container\n\t * element or if the previous text node ends with a space character,\n\t * * space at the end of the text node is removed if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container\n\t * * nbsps are converted to spaces.\n\t *\n\t * @param {Node} node DOM text node to process.\n\t * @returns {String} Processed data.\n\t * @private\n\t */\n\t_processDataFromDomText( node ) {\n\t\tlet data = node.data;\n\n\t\tif ( _hasDomParentOfType( node, this.preElements ) ) {\n\t\t\treturn getDataWithoutFiller( node );\n\t\t}\n\n\t\t// Change all consecutive whitespace characters (from the [ \\n\\t\\r] set –\n\t\t// see https://github.com/ckeditor/ckeditor5-engine/issues/822#issuecomment-311670249) to a single space character.\n\t\t// That's how multiple whitespaces are treated when rendered, so we normalize those whitespaces.\n\t\t// We're replacing 1+ (and not 2+) to also normalize singular \\n\\t\\r characters (#822).\n\t\tdata = data.replace( /[ \\n\\t\\r]{1,}/g, ' ' );\n\n\t\tconst prevNode = this._getTouchingInlineDomNode( node, false );\n\t\tconst nextNode = this._getTouchingInlineDomNode( node, true );\n\n\t\tconst shouldLeftTrim = this._checkShouldLeftTrimDomText( node, prevNode );\n\t\tconst shouldRightTrim = this._checkShouldRightTrimDomText( node, nextNode );\n\n\t\t// If the previous dom text node does not exist or it ends by whitespace character, remove space character from the beginning\n\t\t// of this text node. Such space character is treated as a whitespace.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^ /, '' );\n\t\t}\n\n\t\t// If the next text node does not exist remove space character from the end of this text node.\n\t\tif ( shouldRightTrim ) {\n\t\t\tdata = data.replace( / $/, '' );\n\t\t}\n\n\t\t// At the beginning and end of a block element, Firefox inserts normal space +
instead of non-breaking space.\n\t\t// This means that the text node starts/end with normal space instead of non-breaking space.\n\t\t// This causes a problem because the normal space would be removed in `.replace` calls above. To prevent that,\n\t\t// the inline filler is removed only after the data is initially processed (by the `.replace` above). See ckeditor5#692.\n\t\tdata = getDataWithoutFiller( new Text( data ) );\n\n\t\t// At this point we should have removed all whitespaces from DOM text data.\n\t\t//\n\t\t// Now, We will reverse the process that happens in `_processDataFromViewText`.\n\t\t//\n\t\t// We have to change   chars, that were in DOM text data because of rendering reasons, to spaces.\n\t\t// First, change all ` \\u00A0` pairs (space +  ) to two spaces. DOM converter changes two spaces from model/view to\n\t\t// ` \\u00A0` to ensure proper rendering. Since here we convert back, we recognize those pairs and change them back to ` `.\n\t\tdata = data.replace( / \\u00A0/g, ' ' );\n\n\t\t// Then, let's change the last nbsp to a space.\n\t\tif ( /( |\\u00A0)\\u00A0$/.test( data ) || !nextNode || ( nextNode.data && nextNode.data.charAt( 0 ) == ' ' ) ) {\n\t\t\tdata = data.replace( /\\u00A0$/, ' ' );\n\t\t}\n\n\t\t// Then, change   character that is at the beginning of the text node to space character.\n\t\t// We do that replacement only if this is the first node or the previous node ends on whitespace character.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^\\u00A0/, ' ' );\n\t\t}\n\n\t\t// At this point, all whitespaces should be removed and all   created for rendering reasons should be\n\t\t// changed to normal space. All left   are   inserted intentionally.\n\t\treturn data;\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, preceded by the given `prevNode` should\n\t * be trimmed from the left side.\n\t *\n\t * @private\n\t * @param {Node} node\n\t * @param {Node} prevNode\n\t */\n\t_checkShouldLeftTrimDomText( node, prevNode ) {\n\t\tif ( !prevNode ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( isElement( prevNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Shouldn't left trim if previous node is a node that was encountered as a raw content node.\n\t\tif ( this._encounteredRawContentDomNodes.has( node.previousSibling ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn /[^\\S\\u00A0]/.test( prevNode.data.charAt( prevNode.data.length - 1 ) );\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, succeeded by the given `nextNode` should\n\t * be trimmed from the right side.\n\t *\n\t * @private\n\t * @param {Node} node\n\t * @param {Node} nextNode\n\t */\n\t_checkShouldRightTrimDomText( node, nextNode ) {\n\t\tif ( nextNode ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn !startsWithFiller( node );\n\t}\n\n\t/**\n\t * Helper function. For given {@link module:engine/view/text~Text view text node}, it finds previous or next sibling\n\t * that is contained in the same container element. If there is no such sibling, `null` is returned.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node Reference node.\n\t * @param {Boolean} getNext\n\t * @returns {module:engine/view/text~Text|null} Touching text node or `null` if there is no next or previous touching text node.\n\t */\n\t_getTouchingViewTextNode( node, getNext ) {\n\t\tconst treeWalker = new ViewTreeWalker( {\n\t\t\tstartPosition: getNext ? ViewPosition._createAfter( node ) : ViewPosition._createBefore( node ),\n\t\t\tdirection: getNext ? 'forward' : 'backward'\n\t\t} );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\t// ViewContainerElement is found on a way to next ViewText node, so given `node` was first/last\n\t\t\t// text node in its container element.\n\t\t\tif ( value.item.is( 'containerElement' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t//
found – it works like a block boundary, so do not scan further.\n\t\t\telse if ( value.item.is( 'element', 'br' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t// Found a text node in the same container element.\n\t\t\telse if ( value.item.is( '$textProxy' ) ) {\n\t\t\t\treturn value.item;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Helper function. For the given text node, it finds the closest touching node which is either\n\t * a text node or a `
`. The search is terminated at block element boundaries and if a matching node\n\t * wasn't found so far, `null` is returned.\n\t *\n\t * In the following DOM structure:\n\t *\n\t *\t\t

foobar
bom

\n\t *\n\t * * `foo` doesn't have its previous touching inline node (`null` is returned),\n\t * * `foo`'s next touching inline node is `bar`\n\t * * `bar`'s next touching inline node is `
`\n\t *\n\t * This method returns text nodes and `
` elements because these types of nodes affect how\n\t * spaces in the given text node need to be converted.\n\t *\n\t * @private\n\t * @param {Text} node\n\t * @param {Boolean} getNext\n\t * @returns {Text|Element|null}\n\t */\n\t_getTouchingInlineDomNode( node, getNext ) {\n\t\tif ( !node.parentNode ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst direction = getNext ? 'nextNode' : 'previousNode';\n\t\tconst document = node.ownerDocument;\n\t\tconst topmostParent = getAncestors( node )[ 0 ];\n\n\t\tconst treeWalker = document.createTreeWalker( topmostParent, NodeFilter.SHOW_TEXT | NodeFilter.SHOW_ELEMENT, {\n\t\t\tacceptNode( node ) {\n\t\t\t\tif ( isText( node ) ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\tif ( node.tagName == 'BR' ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\treturn NodeFilter.FILTER_SKIP;\n\t\t\t}\n\t\t} );\n\n\t\ttreeWalker.currentNode = node;\n\n\t\tconst touchingNode = treeWalker[ direction ]();\n\n\t\tif ( touchingNode !== null ) {\n\t\t\tconst lca = getCommonAncestor( node, touchingNode );\n\n\t\t\t// If there is common ancestor between the text node and next/prev text node,\n\t\t\t// and there are no block elements on a way from the text node to that ancestor,\n\t\t\t// and there are no block elements on a way from next/prev text node to that ancestor...\n\t\t\tif (\n\t\t\t\tlca &&\n\t\t\t\t!_hasDomParentOfType( node, this.blockElements, lca ) &&\n\t\t\t\t!_hasDomParentOfType( touchingNode, this.blockElements, lca )\n\t\t\t) {\n\t\t\t\t// Then they are in the same container element.\n\t\t\t\treturn touchingNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n}\n\n// Helper function.\n// Used to check if given native `Element` or `Text` node has parent with tag name from `types` array.\n//\n// @param {Node} node\n// @param {Array.} types\n// @param {Boolean} [boundaryParent] Can be given if parents should be checked up to a given element (excluding that element).\n// @returns {Boolean} `true` if such parent exists or `false` if it does not.\nfunction _hasDomParentOfType( node, types, boundaryParent ) {\n\tlet parents = getAncestors( node );\n\n\tif ( boundaryParent ) {\n\t\tparents = parents.slice( parents.indexOf( boundaryParent ) + 1 );\n\t}\n\n\treturn parents.some( parent => parent.tagName && types.includes( parent.tagName.toLowerCase() ) );\n}\n\n// A helper that executes given callback for each DOM node's ancestor, starting from the given node\n// and ending in document#documentElement.\n//\n// @param {Node} node\n// @param {Function} callback A callback to be executed for each ancestor.\nfunction forEachDomNodeAncestor( node, callback ) {\n\twhile ( node && node != global.document ) {\n\t\tcallback( node );\n\t\tnode = node.parentNode;\n\t}\n}\n\n// Checks if given node is a nbsp block filler.\n//\n// A   is a block filler only if it is a single child of a block element.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction isNbspBlockFiller( domNode, blockElements ) {\n\tconst isNBSP = domNode.isEqualNode( NBSP_FILLER_REF );\n\n\treturn isNBSP && hasBlockParent( domNode, blockElements ) && domNode.parentNode.childNodes.length === 1;\n}\n\n// Checks if domNode has block parent.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction hasBlockParent( domNode, blockElements ) {\n\tconst parent = domNode.parentNode;\n\n\treturn parent && parent.tagName && blockElements.includes( parent.tagName.toLowerCase() );\n}\n\n/**\n * Enum representing type of the block filler.\n *\n * Possible values:\n *\n * * `br` - for `
` block filler used in the editing view,\n * * `nbsp` - for ` ` block fillers used in the data,\n * * `markedNbsp` - for nbsp block fillers wrapped in a span: ` ` used in the data.\n *\n * @typedef {String} module:engine/view/filler~BlockFillerMode\n */\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getcommonancestor\n */\n\nimport getAncestors from './getancestors';\n\n/**\n * Searches and returns the lowest common ancestor of two given nodes.\n *\n * @param {Node} nodeA First node.\n * @param {Node} nodeB Second node.\n * @returns {Node|DocumentFragment|Document|null} Lowest common ancestor of both nodes or `null` if nodes do not have a common ancestor.\n */\nexport default function getCommonAncestor( nodeA, nodeB ) {\n\tconst ancestorsA = getAncestors( nodeA );\n\tconst ancestorsB = getAncestors( nodeB );\n\n\tlet i = 0;\n\n\t// It does not matter which array is shorter.\n\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\ti++;\n\t}\n\n\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/iswindow\n */\n\n/**\n * Checks if the object is a native DOM Window.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isWindow( obj ) {\n\tconst stringifiedObject = Object.prototype.toString.apply( obj );\n\n\t// Returns `true` for the `window` object in browser environments.\n\tif ( stringifiedObject == '[object Window]' ) {\n\t\treturn true;\n\t}\n\n\t// Returns `true` for the `window` object in the Electron environment.\n\tif ( stringifiedObject == '[object global]' ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/emittermixin\n */\n\nimport { default as EmitterMixin, _getEmitterListenedTo, _setEmitterId } from '../emittermixin';\nimport uid from '../uid';\nimport isNode from './isnode';\nimport isWindow from './iswindow';\nimport { extend } from 'lodash-es';\n\n/**\n * Mixin that injects the DOM events API into its host. It provides the API\n * compatible with {@link module:utils/emittermixin~EmitterMixin}.\n *\n * DOM emitter mixin is by default available in the {@link module:ui/view~View} class,\n * but it can also be mixed into any other class:\n *\n *\t\timport mix from '../utils/mix.js';\n *\t\timport DomEmitterMixin from '../utils/dom/emittermixin.js';\n *\n *\t\tclass SomeView {}\n *\t\tmix( SomeView, DomEmitterMixin );\n *\n *\t\tconst view = new SomeView();\n *\t\tview.listenTo( domElement, ( evt, domEvt ) => {\n *\t\t\tconsole.log( evt, domEvt );\n *\t\t} );\n *\n * @mixin EmitterMixin\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n */\nconst DomEmitterMixin = extend( {}, EmitterMixin, {\n\t/**\n\t * Registers a callback function to be executed when an event is fired in a specific Emitter or DOM Node.\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} emitter The object that fires the event.\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n\t * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n\t * order they were added.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t * @param {Boolean} [options.usePassive=false] Indicates that the function specified by listener will never call preventDefault()\n\t * and prevents blocking browser's main thread by this event handler.\n\t */\n\tlistenTo( emitter, ...rest ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with\n\t\t// corresponding ProxyEmitter (or create one if not existing).\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter ) || new ProxyEmitter( emitter );\n\n\t\t\tproxy.attach( ...rest );\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.listenTo.call( this, emitter, ...rest );\n\t},\n\n\t/**\n\t * Stops listening for events. It can be used at different levels:\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * * To stop listening to a specific callback.\n\t * * To stop listening to a specific event.\n\t * * To stop listening to all events fired by a specific object.\n\t * * To stop listening to all events fired by all object.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} [emitter] The object to stop listening to. If omitted, stops it for all objects.\n\t * @param {String} [event] (Requires the `emitter`) The name of the event to stop listening to. If omitted, stops it\n\t * for all events from `emitter`.\n\t * @param {Function} [callback] (Requires the `event`) The function to be removed from the call list for the given\n\t * `event`.\n\t */\n\tstopListening( emitter, event, callback ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with corresponding ProxyEmitter.\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter );\n\n\t\t\t// Element has no listeners.\n\t\t\tif ( !proxy ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.stopListening.call( this, emitter, event, callback );\n\n\t\tif ( emitter instanceof ProxyEmitter ) {\n\t\t\temitter.detach( event );\n\t\t}\n\t},\n\n\t/**\n\t * Retrieves ProxyEmitter instance for given DOM Node residing in this Host.\n\t *\n\t * @private\n\t * @param {Node} node DOM Node of the ProxyEmitter.\n\t * @returns {module:utils/dom/emittermixin~ProxyEmitter} ProxyEmitter instance or null.\n\t */\n\t_getProxyEmitter( node ) {\n\t\treturn _getEmitterListenedTo( this, getNodeUID( node ) );\n\t}\n} );\n\nexport default DomEmitterMixin;\n\n/**\n * Creates a ProxyEmitter instance. Such an instance is a bridge between a DOM Node firing events\n * and any Host listening to them. It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#on}.\n *\n * listenTo( click, ... )\n * +-----------------------------------------+\n * | stopListening( ... ) |\n * +----------------------------+ | addEventListener( click, ... )\n * | Host | | +---------------------------------------------+\n * +----------------------------+ | | removeEventListener( click, ... ) |\n * | _listeningTo: { | +----------v-------------+ |\n * | UID: { | | ProxyEmitter | |\n * | emitter: ProxyEmitter, | +------------------------+ +------------v----------+\n * | callbacks: { | | events: { | | Node (HTMLElement) |\n * | click: [ callbacks ] | | click: [ callbacks ] | +-----------------------+\n * | } | | }, | | data-ck-expando: UID |\n * | } | | _domNode: Node, | +-----------------------+\n * | } | | _domListeners: {}, | |\n * | +------------------------+ | | _emitterId: UID | |\n * | | DomEmitterMixin | | +--------------^---------+ |\n * | +------------------------+ | | | |\n * +--------------^-------------+ | +---------------------------------------------+\n * | | click (DOM Event)\n * +-----------------------------------------+\n * fire( click, DOM Event )\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n * @private\n */\nclass ProxyEmitter {\n\t/**\n\t * @param {Node} node DOM Node that fires events.\n\t * @returns {Object} ProxyEmitter instance bound to the DOM Node.\n\t */\n\tconstructor( node ) {\n\t\t// Set emitter ID to match DOM Node \"expando\" property.\n\t\t_setEmitterId( this, getNodeUID( node ) );\n\n\t\t// Remember the DOM Node this ProxyEmitter is bound to.\n\t\tthis._domNode = node;\n\t}\n}\n\nextend( ProxyEmitter.prototype, EmitterMixin, {\n\t/**\n\t * Collection of native DOM listeners.\n\t *\n\t * @private\n\t * @member {Object} module:utils/dom/emittermixin~ProxyEmitter#_domListeners\n\t */\n\n\t/**\n\t * Registers a callback function to be executed when an event is fired.\n\t *\n\t * It attaches a native DOM listener to the DOM Node. When fired,\n\t * a corresponding Emitter event will also fire with DOM Event object as an argument.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#attach\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t * @param {Boolean} [options.usePassive=false] Indicates that the function specified by listener will never call preventDefault()\n\t * and prevents blocking browser's main thread by this event handler.\n\t */\n\tattach( event, callback, options = {} ) {\n\t\t// If the DOM Listener for given event already exist it is pointless\n\t\t// to attach another one.\n\t\tif ( this._domListeners && this._domListeners[ event ] ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst listenerOptions = {\n\t\t\tcapture: !!options.useCapture,\n\t\t\tpassive: !!options.usePassive\n\t\t};\n\n\t\tconst domListener = this._createDomListener( event, listenerOptions );\n\n\t\t// Attach the native DOM listener to DOM Node.\n\t\tthis._domNode.addEventListener( event, domListener, listenerOptions );\n\n\t\tif ( !this._domListeners ) {\n\t\t\tthis._domListeners = {};\n\t\t}\n\n\t\t// Store the native DOM listener in this ProxyEmitter. It will be helpful\n\t\t// when stopping listening to the event.\n\t\tthis._domListeners[ event ] = domListener;\n\t},\n\n\t/**\n\t * Stops executing the callback on the given event.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#detach\n\t * @param {String} event The name of the event.\n\t */\n\tdetach( event ) {\n\t\tlet events;\n\n\t\t// Remove native DOM listeners which are orphans. If no callbacks\n\t\t// are awaiting given event, detach native DOM listener from DOM Node.\n\t\t// See: {@link attach}.\n\n\t\tif ( this._domListeners[ event ] && ( !( events = this._events[ event ] ) || !events.callbacks.length ) ) {\n\t\t\tthis._domListeners[ event ].removeListener();\n\t\t}\n\t},\n\n\t/**\n\t * Creates a native DOM listener callback. When the native DOM event\n\t * is fired it will fire corresponding event on this ProxyEmitter.\n\t * Note: A native DOM Event is passed as an argument.\n\t *\n\t * @private\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#_createDomListener\n\t * @param {String} event The name of the event.\n\t * @param {Object} [options] Additional options.\n\t * @param {Boolean} [options.capture=false] Indicates whether the listener was created for capturing event.\n\t * @param {Boolean} [options.passive=false] Indicates that the function specified by listener will never call preventDefault()\n\t * and prevents blocking browser's main thread by this event handler.\n\t * @returns {Function} The DOM listener callback.\n\t */\n\t_createDomListener( event, options ) {\n\t\tconst domListener = domEvt => {\n\t\t\tthis.fire( event, domEvt );\n\t\t};\n\n\t\t// Supply the DOM listener callback with a function that will help\n\t\t// detach it from the DOM Node, when it is no longer necessary.\n\t\t// See: {@link detach}.\n\t\tdomListener.removeListener = () => {\n\t\t\tthis._domNode.removeEventListener( event, domListener, options );\n\t\t\tdelete this._domListeners[ event ];\n\t\t};\n\n\t\treturn domListener;\n\t}\n} );\n\n// Gets an unique DOM Node identifier. The identifier will be set if not defined.\n//\n// @private\n// @param {Node} node\n// @returns {String} UID for given DOM Node.\nfunction getNodeUID( node ) {\n\treturn node[ 'data-ck-expando' ] || ( node[ 'data-ck-expando' ] = uid() );\n}\n\n/**\n * Interface representing classes which mix in {@link module:utils/dom/emittermixin~EmitterMixin}.\n *\n * @interface Emitter\n */\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/observer\n */\n\nimport DomEmitterMixin from '@ckeditor/ckeditor5-utils/src/dom/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Abstract base observer class. Observers are classes which listen to DOM events, do the preliminary\n * processing and fire events on the {@link module:engine/view/document~Document} objects.\n * Observers can also add features to the view, for instance by updating its status or marking elements\n * which need a refresh on DOM events.\n *\n * @abstract\n */\nexport default class Observer {\n\t/**\n\t * Creates an instance of the observer.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\t/**\n\t\t * An instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View}\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * A reference to the {@link module:engine/view/document~Document} object.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * The state of the observer. If it is disabled, no events will be fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Enables the observer. This method is called when the observer is registered to the\n\t * {@link module:engine/view/view~View} and after {@link module:engine/view/view~View#forceRender rendering}\n\t * (all observers are {@link #disable disabled} before rendering).\n\t *\n\t * A typical use case for disabling observers is that mutation observers need to be disabled for the rendering.\n\t * However, a child class may not need to be disabled, so it can implement an empty method.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#disable\n\t */\n\tenable() {\n\t\tthis.isEnabled = true;\n\t}\n\n\t/**\n\t * Disables the observer. This method is called before\n\t * {@link module:engine/view/view~View#forceRender rendering} to prevent firing events during rendering.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#enable\n\t */\n\tdisable() {\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Disables and destroys the observer, among others removes event listeners created by the observer.\n\t */\n\tdestroy() {\n\t\tthis.disable();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Checks whether a given DOM event should be ignored (should not be turned into a synthetic view document event).\n\t *\n\t * Currently, an event will be ignored only if its target or any of its ancestors has the `data-cke-ignore-events` attribute.\n\t * This attribute can be used inside the structures generated by\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#createUIElement `DowncastWriter#createUIElement()`} to ignore events\n\t * fired within a UI that should be excluded from CKEditor 5's realms.\n\t *\n\t * @param {Node} domTarget The DOM event target to check (usually an element, sometimes a text node and\n\t * potentially sometimes a document, too).\n\t * @returns {Boolean} Whether this event should be ignored by the observer.\n\t */\n\tcheckShouldIgnoreEventFromTarget( domTarget ) {\n\t\tif ( domTarget && domTarget.nodeType === 3 ) {\n\t\t\tdomTarget = domTarget.parentNode;\n\t\t}\n\n\t\tif ( !domTarget || domTarget.nodeType !== 1 ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn domTarget.matches( '[data-cke-ignore-events], [data-cke-ignore-events] *' );\n\t}\n\n\t/**\n\t * Starts observing the given root element.\n\t *\n\t * @method #observe\n\t * @param {HTMLElement} domElement\n\t * @param {String} name The name of the root element.\n\t */\n}\n\nmix( Observer, DomEmitterMixin );\n","/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Adds `value` to the array cache.\n *\n * @private\n * @name add\n * @memberOf SetCache\n * @alias push\n * @param {*} value The value to cache.\n * @returns {Object} Returns the cache instance.\n */\nfunction setCacheAdd(value) {\n this.__data__.set(value, HASH_UNDEFINED);\n return this;\n}\n\nexport default setCacheAdd;\n","/**\n * Checks if `value` is in the array cache.\n *\n * @private\n * @name has\n * @memberOf SetCache\n * @param {*} value The value to search for.\n * @returns {number} Returns `true` if `value` is found, else `false`.\n */\nfunction setCacheHas(value) {\n return this.__data__.has(value);\n}\n\nexport default setCacheHas;\n","import MapCache from './_MapCache.js';\nimport setCacheAdd from './_setCacheAdd.js';\nimport setCacheHas from './_setCacheHas.js';\n\n/**\n *\n * Creates an array cache object to store unique values.\n *\n * @private\n * @constructor\n * @param {Array} [values] The values to cache.\n */\nfunction SetCache(values) {\n var index = -1,\n length = values == null ? 0 : values.length;\n\n this.__data__ = new MapCache;\n while (++index < length) {\n this.add(values[index]);\n }\n}\n\n// Add methods to `SetCache`.\nSetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\nSetCache.prototype.has = setCacheHas;\n\nexport default SetCache;\n","/**\n * A specialized version of `_.some` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n */\nfunction arraySome(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (predicate(array[index], index, array)) {\n return true;\n }\n }\n return false;\n}\n\nexport default arraySome;\n","/**\n * Checks if a `cache` value for `key` exists.\n *\n * @private\n * @param {Object} cache The cache to query.\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction cacheHas(cache, key) {\n return cache.has(key);\n}\n\nexport default cacheHas;\n","import SetCache from './_SetCache.js';\nimport arraySome from './_arraySome.js';\nimport cacheHas from './_cacheHas.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/**\n * A specialized version of `baseIsEqualDeep` for arrays with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Array} array The array to compare.\n * @param {Array} other The other array to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `array` and `other` objects.\n * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n */\nfunction equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n arrLength = array.length,\n othLength = other.length;\n\n if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n return false;\n }\n // Check that cyclic values are equal.\n var arrStacked = stack.get(array);\n var othStacked = stack.get(other);\n if (arrStacked && othStacked) {\n return arrStacked == other && othStacked == array;\n }\n var index = -1,\n result = true,\n seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n stack.set(array, other);\n stack.set(other, array);\n\n // Ignore non-index properties.\n while (++index < arrLength) {\n var arrValue = array[index],\n othValue = other[index];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, arrValue, index, other, array, stack)\n : customizer(arrValue, othValue, index, array, other, stack);\n }\n if (compared !== undefined) {\n if (compared) {\n continue;\n }\n result = false;\n break;\n }\n // Recursively compare arrays (susceptible to call stack limits).\n if (seen) {\n if (!arraySome(other, function(othValue, othIndex) {\n if (!cacheHas(seen, othIndex) &&\n (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n return seen.push(othIndex);\n }\n })) {\n result = false;\n break;\n }\n } else if (!(\n arrValue === othValue ||\n equalFunc(arrValue, othValue, bitmask, customizer, stack)\n )) {\n result = false;\n break;\n }\n }\n stack['delete'](array);\n stack['delete'](other);\n return result;\n}\n\nexport default equalArrays;\n","/**\n * Converts `map` to its key-value pairs.\n *\n * @private\n * @param {Object} map The map to convert.\n * @returns {Array} Returns the key-value pairs.\n */\nfunction mapToArray(map) {\n var index = -1,\n result = Array(map.size);\n\n map.forEach(function(value, key) {\n result[++index] = [key, value];\n });\n return result;\n}\n\nexport default mapToArray;\n","/**\n * Converts `set` to an array of its values.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the values.\n */\nfunction setToArray(set) {\n var index = -1,\n result = Array(set.size);\n\n set.forEach(function(value) {\n result[++index] = value;\n });\n return result;\n}\n\nexport default setToArray;\n","import Symbol from './_Symbol.js';\nimport Uint8Array from './_Uint8Array.js';\nimport eq from './eq.js';\nimport equalArrays from './_equalArrays.js';\nimport mapToArray from './_mapToArray.js';\nimport setToArray from './_setToArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]';\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * A specialized version of `baseIsEqualDeep` for comparing objects of\n * the same `toStringTag`.\n *\n * **Note:** This function only supports comparing values with tags of\n * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {string} tag The `toStringTag` of the objects to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n switch (tag) {\n case dataViewTag:\n if ((object.byteLength != other.byteLength) ||\n (object.byteOffset != other.byteOffset)) {\n return false;\n }\n object = object.buffer;\n other = other.buffer;\n\n case arrayBufferTag:\n if ((object.byteLength != other.byteLength) ||\n !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n return false;\n }\n return true;\n\n case boolTag:\n case dateTag:\n case numberTag:\n // Coerce booleans to `1` or `0` and dates to milliseconds.\n // Invalid dates are coerced to `NaN`.\n return eq(+object, +other);\n\n case errorTag:\n return object.name == other.name && object.message == other.message;\n\n case regexpTag:\n case stringTag:\n // Coerce regexes to strings and treat strings, primitives and objects,\n // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n // for more details.\n return object == (other + '');\n\n case mapTag:\n var convert = mapToArray;\n\n case setTag:\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n convert || (convert = setToArray);\n\n if (object.size != other.size && !isPartial) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked) {\n return stacked == other;\n }\n bitmask |= COMPARE_UNORDERED_FLAG;\n\n // Recursively compare objects (susceptible to call stack limits).\n stack.set(object, other);\n var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n stack['delete'](object);\n return result;\n\n case symbolTag:\n if (symbolValueOf) {\n return symbolValueOf.call(object) == symbolValueOf.call(other);\n }\n }\n return false;\n}\n\nexport default equalByTag;\n","import getAllKeys from './_getAllKeys.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqualDeep` for objects with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n objProps = getAllKeys(object),\n objLength = objProps.length,\n othProps = getAllKeys(other),\n othLength = othProps.length;\n\n if (objLength != othLength && !isPartial) {\n return false;\n }\n var index = objLength;\n while (index--) {\n var key = objProps[index];\n if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n return false;\n }\n }\n // Check that cyclic values are equal.\n var objStacked = stack.get(object);\n var othStacked = stack.get(other);\n if (objStacked && othStacked) {\n return objStacked == other && othStacked == object;\n }\n var result = true;\n stack.set(object, other);\n stack.set(other, object);\n\n var skipCtor = isPartial;\n while (++index < objLength) {\n key = objProps[index];\n var objValue = object[key],\n othValue = other[key];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, objValue, key, other, object, stack)\n : customizer(objValue, othValue, key, object, other, stack);\n }\n // Recursively compare objects (susceptible to call stack limits).\n if (!(compared === undefined\n ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n : compared\n )) {\n result = false;\n break;\n }\n skipCtor || (skipCtor = key == 'constructor');\n }\n if (result && !skipCtor) {\n var objCtor = object.constructor,\n othCtor = other.constructor;\n\n // Non `Object` object instances with different constructors are not equal.\n if (objCtor != othCtor &&\n ('constructor' in object && 'constructor' in other) &&\n !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n result = false;\n }\n }\n stack['delete'](object);\n stack['delete'](other);\n return result;\n}\n\nexport default equalObjects;\n","import Stack from './_Stack.js';\nimport equalArrays from './_equalArrays.js';\nimport equalByTag from './_equalByTag.js';\nimport equalObjects from './_equalObjects.js';\nimport getTag from './_getTag.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isTypedArray from './isTypedArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n objectTag = '[object Object]';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqual` for arrays and objects which performs\n * deep comparisons and tracks traversed objects enabling objects with circular\n * references to be compared.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n var objIsArr = isArray(object),\n othIsArr = isArray(other),\n objTag = objIsArr ? arrayTag : getTag(object),\n othTag = othIsArr ? arrayTag : getTag(other);\n\n objTag = objTag == argsTag ? objectTag : objTag;\n othTag = othTag == argsTag ? objectTag : othTag;\n\n var objIsObj = objTag == objectTag,\n othIsObj = othTag == objectTag,\n isSameTag = objTag == othTag;\n\n if (isSameTag && isBuffer(object)) {\n if (!isBuffer(other)) {\n return false;\n }\n objIsArr = true;\n objIsObj = false;\n }\n if (isSameTag && !objIsObj) {\n stack || (stack = new Stack);\n return (objIsArr || isTypedArray(object))\n ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n }\n if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n if (objIsWrapped || othIsWrapped) {\n var objUnwrapped = objIsWrapped ? object.value() : object,\n othUnwrapped = othIsWrapped ? other.value() : other;\n\n stack || (stack = new Stack);\n return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n }\n }\n if (!isSameTag) {\n return false;\n }\n stack || (stack = new Stack);\n return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n}\n\nexport default baseIsEqualDeep;\n","import baseIsEqualDeep from './_baseIsEqualDeep.js';\nimport isObjectLike from './isObjectLike.js';\n\n/**\n * The base implementation of `_.isEqual` which supports partial comparisons\n * and tracks traversed objects.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Unordered comparison\n * 2 - Partial comparison\n * @param {Function} [customizer] The function to customize comparisons.\n * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n */\nfunction baseIsEqual(value, other, bitmask, customizer, stack) {\n if (value === other) {\n return true;\n }\n if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n return value !== value && other !== other;\n }\n return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n}\n\nexport default baseIsEqual;\n","import baseIsEqual from './_baseIsEqual.js';\n\n/**\n * This method is like `_.isEqual` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with up to\n * six arguments: (objValue, othValue [, index|key, object, other, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, othValue) {\n * if (isGreeting(objValue) && isGreeting(othValue)) {\n * return true;\n * }\n * }\n *\n * var array = ['hello', 'goodbye'];\n * var other = ['hi', 'goodbye'];\n *\n * _.isEqualWith(array, other, customizer);\n * // => true\n */\nfunction isEqualWith(value, other, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n var result = customizer ? customizer(value, other) : undefined;\n return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;\n}\n\nexport default isEqualWith;\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/mutationobserver\n */\n\n/* globals window */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { startsWithFiller, getDataWithoutFiller } from '../filler';\nimport { isEqualWith } from 'lodash-es';\n\n/**\n * Mutation observer class observes changes in the DOM, fires {@link module:engine/view/document~Document#event:mutations} event, mark view\n * elements as changed and call {@link module:engine/view/renderer~Renderer#render}.\n * Because all mutated nodes are marked as \"to be rendered\" and the\n * {@link module:engine/view/renderer~Renderer#render} is called, all changes will be reverted, unless the mutation will be handled by the\n * {@link module:engine/view/document~Document#event:mutations} event listener. It means user will see only handled changes, and the editor\n * will block all changes which are not handled.\n *\n * Mutation Observer also take care of reducing number of mutations which are fired. It removes duplicates and\n * mutations on elements which do not have corresponding view elements. Also\n * {@link module:engine/view/observer/mutationobserver~MutatedText text mutation} is fired only if parent element do not change child list.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class MutationObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Native mutation observer config.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._config = {\n\t\t\tchildList: true,\n\t\t\tcharacterData: true,\n\t\t\tcharacterDataOldValue: true,\n\t\t\tsubtree: true\n\t\t};\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#_renderer}.\n\t\t *\n\t\t * @member {module:engine/view/renderer~Renderer}\n\t\t */\n\t\tthis.renderer = view._renderer;\n\n\t\t/**\n\t\t * Observed DOM elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.}\n\t\t */\n\t\tthis._domElements = [];\n\n\t\t/**\n\t\t * Native mutation observer.\n\t\t *\n\t\t * @private\n\t\t * @member {MutationObserver}\n\t\t */\n\t\tthis._mutationObserver = new window.MutationObserver( this._onMutations.bind( this ) );\n\t}\n\n\t/**\n\t * Synchronously fires {@link module:engine/view/document~Document#event:mutations} event with all mutations in record queue.\n\t * At the same time empties the queue so mutations will not be fired twice.\n\t */\n\tflush() {\n\t\tthis._onMutations( this._mutationObserver.takeRecords() );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tthis._domElements.push( domElement );\n\n\t\tif ( this.isEnabled ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tenable() {\n\t\tsuper.enable();\n\n\t\tfor ( const domElement of this._domElements ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdisable() {\n\t\tsuper.disable();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * Handles mutations. Deduplicates, mark view elements to sync, fire event and call render.\n\t *\n\t * @private\n\t * @param {Array.} domMutations Array of native mutations.\n\t */\n\t_onMutations( domMutations ) {\n\t\t// As a result of this.flush() we can have an empty collection.\n\t\tif ( domMutations.length === 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domConverter = this.domConverter;\n\n\t\t// Use map and set for deduplication.\n\t\tconst mutatedTexts = new Map();\n\t\tconst mutatedElements = new Set();\n\n\t\t// Handle `childList` mutations first, so we will be able to check if the `characterData` mutation is in the\n\t\t// element with changed structure anyway.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tif ( mutation.type === 'childList' ) {\n\t\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t\t// Do not collect mutations from UIElements and RawElements.\n\t\t\t\tif ( element && ( element.is( 'uiElement' ) || element.is( 'rawElement' ) ) ) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif ( element && !this._isBogusBrMutation( mutation ) ) {\n\t\t\t\t\tmutatedElements.add( element );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Handle `characterData` mutations later, when we have the full list of nodes which changed structure.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t// Do not collect mutations from UIElements and RawElements.\n\t\t\tif ( element && ( element.is( 'uiElement' ) || element.is( 'rawElement' ) ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tif ( mutation.type === 'characterData' ) {\n\t\t\t\tconst text = domConverter.findCorrespondingViewText( mutation.target );\n\n\t\t\t\tif ( text && !mutatedElements.has( text.parent ) ) {\n\t\t\t\t\t// Use text as a key, for deduplication. If there will be another mutation on the same text element\n\t\t\t\t\t// we will have only one in the map.\n\t\t\t\t\tmutatedTexts.set( text, {\n\t\t\t\t\t\ttype: 'text',\n\t\t\t\t\t\toldText: text.data,\n\t\t\t\t\t\tnewText: getDataWithoutFiller( mutation.target ),\n\t\t\t\t\t\tnode: text\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t\t// When we added first letter to the text node which had only inline filler, for the DOM it is mutation\n\t\t\t\t// on text, but for the view, where filler text node did not existed, new text node was created, so we\n\t\t\t\t// need to fire 'children' mutation instead of 'text'.\n\t\t\t\telse if ( !text && startsWithFiller( mutation.target ) ) {\n\t\t\t\t\tmutatedElements.add( domConverter.mapDomToView( mutation.target.parentNode ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Now we build the list of mutations to fire and mark elements. We did not do it earlier to avoid marking the\n\t\t// same node multiple times in case of duplication.\n\n\t\t// List of mutations we will fire.\n\t\tconst viewMutations = [];\n\n\t\tfor ( const mutatedText of mutatedTexts.values() ) {\n\t\t\tthis.renderer.markToSync( 'text', mutatedText.node );\n\t\t\tviewMutations.push( mutatedText );\n\t\t}\n\n\t\tfor ( const viewElement of mutatedElements ) {\n\t\t\tconst domElement = domConverter.mapViewToDom( viewElement );\n\t\t\tconst viewChildren = Array.from( viewElement.getChildren() );\n\t\t\tconst newViewChildren = Array.from( domConverter.domChildrenToView( domElement, { withChildren: false } ) );\n\n\t\t\t// It may happen that as a result of many changes (sth was inserted and then removed),\n\t\t\t// both elements haven't really changed. #1031\n\t\t\tif ( !isEqualWith( viewChildren, newViewChildren, sameNodes ) ) {\n\t\t\t\tthis.renderer.markToSync( 'children', viewElement );\n\n\t\t\t\tviewMutations.push( {\n\t\t\t\t\ttype: 'children',\n\t\t\t\t\toldChildren: viewChildren,\n\t\t\t\t\tnewChildren: newViewChildren,\n\t\t\t\t\tnode: viewElement\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\t// Retrieve `domSelection` using `ownerDocument` of one of mutated nodes.\n\t\t// There should not be simultaneous mutation in multiple documents, so it's fine.\n\t\tconst domSelection = domMutations[ 0 ].target.ownerDocument.getSelection();\n\n\t\tlet viewSelection = null;\n\n\t\tif ( domSelection && domSelection.anchorNode ) {\n\t\t\t// If `domSelection` is inside a dom node that is already bound to a view node from view tree, get\n\t\t\t// corresponding selection in the view and pass it together with `viewMutations`. The `viewSelection` may\n\t\t\t// be used by features handling mutations.\n\t\t\t// Only one range is supported.\n\n\t\t\tconst viewSelectionAnchor = domConverter.domPositionToView( domSelection.anchorNode, domSelection.anchorOffset );\n\t\t\tconst viewSelectionFocus = domConverter.domPositionToView( domSelection.focusNode, domSelection.focusOffset );\n\n\t\t\t// Anchor and focus has to be properly mapped to view.\n\t\t\tif ( viewSelectionAnchor && viewSelectionFocus ) {\n\t\t\t\tviewSelection = new ViewSelection( viewSelectionAnchor );\n\t\t\t\tviewSelection.setFocus( viewSelectionFocus );\n\t\t\t}\n\t\t}\n\n\t\t// In case only non-relevant mutations were recorded it skips the event and force render (#5600).\n\t\tif ( viewMutations.length ) {\n\t\t\tthis.document.fire( 'mutations', viewMutations, viewSelection );\n\n\t\t\t// If nothing changes on `mutations` event, at this point we have \"dirty DOM\" (changed) and de-synched\n\t\t\t// view (which has not been changed). In order to \"reset DOM\" we render the view again.\n\t\t\tthis.view.forceRender();\n\t\t}\n\n\t\tfunction sameNodes( child1, child2 ) {\n\t\t\t// First level of comparison (array of children vs array of children) – use the Lodash's default behavior.\n\t\t\tif ( Array.isArray( child1 ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Elements.\n\t\t\tif ( child1 === child2 ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t\t// Texts.\n\t\t\telse if ( child1.is( '$text' ) && child2.is( '$text' ) ) {\n\t\t\t\treturn child1.data === child2.data;\n\t\t\t}\n\n\t\t\t// Not matching types.\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Checks if mutation was generated by the browser inserting bogus br on the end of the block element.\n\t * Such mutations are generated while pressing space or performing native spellchecker correction\n\t * on the end of the block element in Firefox browser.\n\t *\n\t * @private\n\t * @param {Object} mutation Native mutation object.\n\t * @returns {Boolean}\n\t */\n\t_isBogusBrMutation( mutation ) {\n\t\tlet addedNode = null;\n\n\t\t// Check if mutation added only one node on the end of its parent.\n\t\tif ( mutation.nextSibling === null && mutation.removedNodes.length === 0 && mutation.addedNodes.length == 1 ) {\n\t\t\taddedNode = this.domConverter.domToView( mutation.addedNodes[ 0 ], {\n\t\t\t\twithChildren: false\n\t\t\t} );\n\t\t}\n\n\t\treturn addedNode && addedNode.is( 'element', 'br' );\n\t}\n}\n\n/**\n * Fired when mutation occurred. If tree view is not changed on this event, DOM will be reverted to the state before\n * mutation, so all changes which should be applied, should be handled on this event.\n *\n * Introduced by {@link module:engine/view/observer/mutationobserver~MutationObserver}.\n *\n * Note that because {@link module:engine/view/observer/mutationobserver~MutationObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @event module:engine/view/document~Document#event:mutations\n * @param {Array.}\n * viewMutations Array of mutations.\n * For mutated texts it will be {@link module:engine/view/observer/mutationobserver~MutatedText} and for mutated elements it will be\n * {@link module:engine/view/observer/mutationobserver~MutatedChildren}. You can recognize the type based on the `type` property.\n * @param {module:engine/view/selection~Selection|null} viewSelection View selection that is a result of converting DOM selection to view.\n * Keep in\n * mind that the DOM selection is already \"updated\", meaning that it already acknowledges changes done in mutation.\n */\n\n/**\n * Mutation item for text.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedText\n *\n * @property {String} type For text mutations it is always 'text'.\n * @property {module:engine/view/text~Text} node Mutated text node.\n * @property {String} oldText Old text.\n * @property {String} newText New text.\n */\n\n/**\n * Mutation item for child nodes.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedText\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @property {String} type For child nodes mutations it is always 'children'.\n * @property {module:engine/view/element~Element} node Parent of the mutated children.\n * @property {Array.} oldChildren Old child nodes.\n * @property {Array.} newChildren New child nodes.\n */\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventdata\n */\n\nimport { extend } from 'lodash-es';\n\n/**\n * Information about a DOM event in context of the {@link module:engine/view/document~Document}.\n * It wraps the native event, which usually should not be used as the wrapper contains\n * additional data (like key code for keyboard events).\n */\nexport default class DomEventData {\n\t/**\n\t * @param {module:engine/view/view~View} view The instance of the view controller.\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] Additional properties that the instance should contain.\n\t */\n\tconstructor( view, domEvent, additionalData ) {\n\t\t/**\n\t\t * Instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View} module:engine/view/observer/observer~Observer.DomEvent#view\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * The instance of the document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document} module:engine/view/observer/observer~Observer.DomEvent#document\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * The DOM event.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Event} module:engine/view/observer/observer~Observer.DomEvent#domEvent\n\t\t */\n\t\tthis.domEvent = domEvent;\n\n\t\t/**\n\t\t * The DOM target.\n\t\t *\n\t\t * @readonly\n\t\t * @member {HTMLElement} module:engine/view/observer/observer~Observer.DomEvent#target\n\t\t */\n\t\tthis.domTarget = domEvent.target;\n\n\t\textend( this, additionalData );\n\t}\n\n\t/**\n\t * The tree view element representing the target.\n\t *\n\t * @readonly\n\t * @type module:engine/view/element~Element\n\t */\n\tget target() {\n\t\treturn this.view.domConverter.mapDomToView( this.domTarget );\n\t}\n\n\t/**\n\t * Prevents the native's event default action.\n\t */\n\tpreventDefault() {\n\t\tthis.domEvent.preventDefault();\n\t}\n\n\t/**\n\t * Stops native event propagation.\n\t */\n\tstopPropagation() {\n\t\tthis.domEvent.stopPropagation();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventobserver\n */\n\nimport Observer from './observer';\nimport DomEventData from './domeventdata';\n\n/**\n * Base class for DOM event observers. This class handles\n * {@link module:engine/view/observer/observer~Observer#observe adding} listeners to DOM elements,\n * {@link module:engine/view/observer/observer~Observer#disable disabling} and\n * {@link module:engine/view/observer/observer~Observer#enable re-enabling} events.\n * Child class needs to define\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#domEventType DOM event type} and\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#onDomEvent callback}.\n *\n * For instance:\n *\n *\t\tclass ClickObserver extends DomEventObserver {\n *\t\t\t// It can also be defined as a normal property in the constructor.\n *\t\t\tget domEventType() {\n *\t\t\t\treturn 'click';\n *\t\t\t}\n *\n *\t\t\tonDomEvent( domEvent ) {\n *\t\t\t\tthis.fire( 'click', domEvent );\n *\t\t\t}\n *\t\t}\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class DomEventObserver extends Observer {\n\t/**\n\t * Type of the DOM event the observer should listen to. Array of types can be defined\n\t * if the observer should listen to multiple DOM events.\n\t *\n\t * @readonly\n\t * @member {String|Array.} #domEventType\n\t */\n\n\t/**\n\t * Callback which should be called when the DOM event occurred. Note that the callback will not be called if\n\t * observer {@link #isEnabled is not enabled}.\n\t *\n\t * @see #domEventType\n\t * @abstract\n\t * @method #onDomEvent\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * If set to `true` DOM events will be listened on the capturing phase.\n\t\t * Default value is `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.useCapture = false;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst types = typeof this.domEventType == 'string' ? [ this.domEventType ] : this.domEventType;\n\n\t\ttypes.forEach( type => {\n\t\t\tthis.listenTo( domElement, type, ( eventInfo, domEvent ) => {\n\t\t\t\tif ( this.isEnabled && !this.checkShouldIgnoreEventFromTarget( domEvent.target ) ) {\n\t\t\t\t\tthis.onDomEvent( domEvent );\n\t\t\t\t}\n\t\t\t}, { useCapture: this.useCapture } );\n\t\t} );\n\t}\n\n\t/**\n\t * Calls `Document#fire()` if observer {@link #isEnabled is enabled}.\n\t *\n\t * @see module:utils/emittermixin~EmitterMixin#fire\n\t * @param {String} eventType The event type (name).\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] The additional data which should extend the\n\t * {@link module:engine/view/observer/domeventdata~DomEventData event data} object.\n\t */\n\tfire( eventType, domEvent, additionalData ) {\n\t\tif ( this.isEnabled ) {\n\t\t\tthis.document.fire( eventType, new DomEventData( this.view, domEvent, additionalData ) );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/keyobserver\n */\n\nimport DomEventObserver from './domeventobserver';\nimport { getCode } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * Observer for events connected with pressing keyboard keys.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class KeyObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'keydown', 'keyup' ];\n\t}\n\n\tonDomEvent( domEvt ) {\n\t\tthis.fire( domEvt.type, domEvt, {\n\t\t\tkeyCode: domEvt.keyCode,\n\n\t\t\taltKey: domEvt.altKey,\n\t\t\tctrlKey: domEvt.ctrlKey,\n\t\t\tshiftKey: domEvt.shiftKey,\n\t\t\tmetaKey: domEvt.metaKey,\n\n\t\t\tget keystroke() {\n\t\t\t\treturn getCode( this );\n\t\t\t}\n\t\t} );\n\t}\n}\n\n/**\n * Fired when a key has been pressed.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keydown\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * Fired when a key has been released.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keyup\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * The value of both events - {@link module:engine/view/document~Document#event:keydown} and\n * {@link module:engine/view/document~Document#event:keyup}.\n *\n * @class module:engine/view/observer/keyobserver~KeyEventData\n * @extends module:engine/view/observer/domeventdata~DomEventData\n * @implements module:utils/keyboard~KeystrokeInfo\n */\n\n/**\n * Code of the whole keystroke. See {@link module:utils/keyboard~getCode}.\n *\n * @readonly\n * @member {Number} module:engine/view/observer/keyobserver~KeyEventData#keystroke\n */\n","import root from './_root.js';\n\n/**\n * Gets the timestamp of the number of milliseconds that have elapsed since\n * the Unix epoch (1 January 1970 00:00:00 UTC).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Date\n * @returns {number} Returns the timestamp.\n * @example\n *\n * _.defer(function(stamp) {\n * console.log(_.now() - stamp);\n * }, _.now());\n * // => Logs the number of milliseconds it took for the deferred invocation.\n */\nvar now = function() {\n return root.Date.now();\n};\n\nexport default now;\n","/** Used to match a single whitespace character. */\nvar reWhitespace = /\\s/;\n\n/**\n * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace\n * character of `string`.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {number} Returns the index of the last non-whitespace character.\n */\nfunction trimmedEndIndex(string) {\n var index = string.length;\n\n while (index-- && reWhitespace.test(string.charAt(index))) {}\n return index;\n}\n\nexport default trimmedEndIndex;\n","import trimmedEndIndex from './_trimmedEndIndex.js';\n\n/** Used to match leading whitespace. */\nvar reTrimStart = /^\\s+/;\n\n/**\n * The base implementation of `_.trim`.\n *\n * @private\n * @param {string} string The string to trim.\n * @returns {string} Returns the trimmed string.\n */\nfunction baseTrim(string) {\n return string\n ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '')\n : string;\n}\n\nexport default baseTrim;\n","import baseTrim from './_baseTrim.js';\nimport isObject from './isObject.js';\nimport isSymbol from './isSymbol.js';\n\n/** Used as references for various `Number` constants. */\nvar NAN = 0 / 0;\n\n/** Used to detect bad signed hexadecimal string values. */\nvar reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n/** Used to detect binary string values. */\nvar reIsBinary = /^0b[01]+$/i;\n\n/** Used to detect octal string values. */\nvar reIsOctal = /^0o[0-7]+$/i;\n\n/** Built-in method references without a dependency on `root`. */\nvar freeParseInt = parseInt;\n\n/**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\nfunction toNumber(value) {\n if (typeof value == 'number') {\n return value;\n }\n if (isSymbol(value)) {\n return NAN;\n }\n if (isObject(value)) {\n var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n value = isObject(other) ? (other + '') : other;\n }\n if (typeof value != 'string') {\n return value === 0 ? value : +value;\n }\n value = baseTrim(value);\n var isBinary = reIsBinary.test(value);\n return (isBinary || reIsOctal.test(value))\n ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n : (reIsBadHex.test(value) ? NAN : +value);\n}\n\nexport default toNumber;\n","import isObject from './isObject.js';\nimport now from './now.js';\nimport toNumber from './toNumber.js';\n\n/** Error message constants. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max,\n nativeMin = Math.min;\n\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked. The debounced function comes with a `cancel` method to cancel\n * delayed `func` invocations and a `flush` method to immediately invoke them.\n * Provide `options` to indicate whether `func` should be invoked on the\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n * with the last arguments provided to the debounced function. Subsequent\n * calls to the debounced function return the result of the last `func`\n * invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the debounced function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.debounce` and `_.throttle`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to debounce.\n * @param {number} [wait=0] The number of milliseconds to delay.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=false]\n * Specify invoking on the leading edge of the timeout.\n * @param {number} [options.maxWait]\n * The maximum time `func` is allowed to be delayed before it's invoked.\n * @param {boolean} [options.trailing=true]\n * Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new debounced function.\n * @example\n *\n * // Avoid costly calculations while the window size is in flux.\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n *\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\n * 'leading': true,\n * 'trailing': false\n * }));\n *\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n * var source = new EventSource('/stream');\n * jQuery(source).on('message', debounced);\n *\n * // Cancel the trailing debounced invocation.\n * jQuery(window).on('popstate', debounced.cancel);\n */\nfunction debounce(func, wait, options) {\n var lastArgs,\n lastThis,\n maxWait,\n result,\n timerId,\n lastCallTime,\n lastInvokeTime = 0,\n leading = false,\n maxing = false,\n trailing = true;\n\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n wait = toNumber(wait) || 0;\n if (isObject(options)) {\n leading = !!options.leading;\n maxing = 'maxWait' in options;\n maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n trailing = 'trailing' in options ? !!options.trailing : trailing;\n }\n\n function invokeFunc(time) {\n var args = lastArgs,\n thisArg = lastThis;\n\n lastArgs = lastThis = undefined;\n lastInvokeTime = time;\n result = func.apply(thisArg, args);\n return result;\n }\n\n function leadingEdge(time) {\n // Reset any `maxWait` timer.\n lastInvokeTime = time;\n // Start the timer for the trailing edge.\n timerId = setTimeout(timerExpired, wait);\n // Invoke the leading edge.\n return leading ? invokeFunc(time) : result;\n }\n\n function remainingWait(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime,\n timeWaiting = wait - timeSinceLastCall;\n\n return maxing\n ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)\n : timeWaiting;\n }\n\n function shouldInvoke(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime;\n\n // Either this is the first call, activity has stopped and we're at the\n // trailing edge, the system time has gone backwards and we're treating\n // it as the trailing edge, or we've hit the `maxWait` limit.\n return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n }\n\n function timerExpired() {\n var time = now();\n if (shouldInvoke(time)) {\n return trailingEdge(time);\n }\n // Restart the timer.\n timerId = setTimeout(timerExpired, remainingWait(time));\n }\n\n function trailingEdge(time) {\n timerId = undefined;\n\n // Only invoke if we have `lastArgs` which means `func` has been\n // debounced at least once.\n if (trailing && lastArgs) {\n return invokeFunc(time);\n }\n lastArgs = lastThis = undefined;\n return result;\n }\n\n function cancel() {\n if (timerId !== undefined) {\n clearTimeout(timerId);\n }\n lastInvokeTime = 0;\n lastArgs = lastCallTime = lastThis = timerId = undefined;\n }\n\n function flush() {\n return timerId === undefined ? result : trailingEdge(now());\n }\n\n function debounced() {\n var time = now(),\n isInvoking = shouldInvoke(time);\n\n lastArgs = arguments;\n lastThis = this;\n lastCallTime = time;\n\n if (isInvoking) {\n if (timerId === undefined) {\n return leadingEdge(lastCallTime);\n }\n if (maxing) {\n // Handle invocations in a tight loop.\n clearTimeout(timerId);\n timerId = setTimeout(timerExpired, wait);\n return invokeFunc(lastCallTime);\n }\n }\n if (timerId === undefined) {\n timerId = setTimeout(timerExpired, wait);\n }\n return result;\n }\n debounced.cancel = cancel;\n debounced.flush = flush;\n return debounced;\n}\n\nexport default debounce;\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/fakeselectionobserver\n */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport { debounce } from 'lodash-es';\n\n/**\n * Fake selection observer class. If view selection is fake it is placed in dummy DOM container. This observer listens\n * on {@link module:engine/view/document~Document#event:keydown keydown} events and handles moving fake view selection to the correct place\n * if arrow keys are pressed.\n * Fires {@link module:engine/view/document~Document#event:selectionChange selectionChange event} simulating natural behaviour of\n * {@link module:engine/view/observer/selectionobserver~SelectionObserver SelectionObserver}.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class FakeSelectionObserver extends Observer {\n\t/**\n\t * Creates new FakeSelectionObserver instance.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'arrowKey', ( eventInfo, data ) => {\n\t\t\tconst selection = document.selection;\n\n\t\t\tif ( selection.isFake && this.isEnabled ) {\n\t\t\t\t// Prevents default key down handling - no selection change will occur.\n\t\t\t\tdata.preventDefault();\n\t\t\t}\n\t\t}, { context: '$capture' } );\n\n\t\tdocument.on( 'arrowKey', ( eventInfo, data ) => {\n\t\t\tconst selection = document.selection;\n\n\t\t\tif ( selection.isFake && this.isEnabled ) {\n\t\t\t\tthis._handleSelectionMove( data.keyCode );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Handles collapsing view selection according to given key code. If left or up key is provided - new selection will be\n\t * collapsed to left. If right or down key is pressed - new selection will be collapsed to right.\n\t *\n\t * This method fires {@link module:engine/view/document~Document#event:selectionChange} and\n\t * {@link module:engine/view/document~Document#event:selectionChangeDone} events imitating behaviour of\n\t * {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n\t *\n\t * @private\n\t * @param {Number} keyCode\n\t * @fires module:engine/view/document~Document#event:selectionChange\n\t * @fires module:engine/view/document~Document#event:selectionChangeDone\n\t */\n\t_handleSelectionMove( keyCode ) {\n\t\tconst selection = this.document.selection;\n\t\tconst newSelection = new ViewSelection( selection.getRanges(), { backward: selection.isBackward, fake: false } );\n\n\t\t// Left or up arrow pressed - move selection to start.\n\t\tif ( keyCode == keyCodes.arrowleft || keyCode == keyCodes.arrowup ) {\n\t\t\tnewSelection.setTo( newSelection.getFirstPosition() );\n\t\t}\n\n\t\t// Right or down arrow pressed - move selection to end.\n\t\tif ( keyCode == keyCodes.arrowright || keyCode == keyCodes.arrowdown ) {\n\t\t\tnewSelection.setTo( newSelection.getLastPosition() );\n\t\t}\n\n\t\tconst data = {\n\t\t\toldSelection: selection,\n\t\t\tnewSelection,\n\t\t\tdomSelection: null\n\t\t};\n\n\t\t// Fire dummy selection change event.\n\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t// Call` #_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/selectionobserver\n */\n\n/* global setInterval, clearInterval */\n\nimport Observer from './observer';\nimport MutationObserver from './mutationobserver';\nimport { debounce } from 'lodash-es';\n\n/**\n * Selection observer class observes selection changes in the document. If a selection changes on the document this\n * observer checks if there are any mutations and if the DOM selection is different from the\n * {@link module:engine/view/document~Document#selection view selection}. The selection observer fires\n * {@link module:engine/view/document~Document#event:selectionChange} event only if a selection change was the only change in the document\n * and the DOM selection is different then the view selection.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class SelectionObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Instance of the mutation observer. Selection observer calls\n\t\t * {@link module:engine/view/observer/mutationobserver~MutationObserver#flush} to ensure that the mutations will be handled\n\t\t * before the {@link module:engine/view/document~Document#event:selectionChange} event is fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/observer/mutationobserver~MutationObserver}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#mutationObserver\n\t\t */\n\t\tthis.mutationObserver = view.getObserver( MutationObserver );\n\n\t\t/**\n\t\t * Reference to the view {@link module:engine/view/documentselection~DocumentSelection} object used to compare\n\t\t * new selection with it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#selection\n\t\t */\n\t\tthis.selection = this.document.selection;\n\n\t\t/* eslint-disable max-len */\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter} module:engine/view/observer/selectionobserver~SelectionObserver#domConverter\n\t\t */\n\t\t/* eslint-enable max-len */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * A set of documents which have added `selectionchange` listener to avoid adding a listener twice to the same\n\t\t * document.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakSet.} module:engine/view/observer/selectionobserver~SelectionObserver#_documents\n\t\t */\n\t\tthis._documents = new WeakSet();\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\n\t\tthis._clearInfiniteLoopInterval = setInterval( () => this._clearInfiniteLoop(), 1000 );\n\n\t\t/**\n\t\t * Private property to check if the code does not enter infinite loop.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} module:engine/view/observer/selectionobserver~SelectionObserver#_loopbackCounter\n\t\t */\n\t\tthis._loopbackCounter = 0;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst domDocument = domElement.ownerDocument;\n\n\t\t// Add listener once per each document.\n\t\tif ( this._documents.has( domDocument ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.listenTo( domDocument, 'selectionchange', ( evt, domEvent ) => {\n\t\t\tthis._handleSelectionChange( domEvent, domDocument );\n\t\t} );\n\n\t\tthis._documents.add( domDocument );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tclearInterval( this._clearInfiniteLoopInterval );\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Selection change listener. {@link module:engine/view/observer/mutationobserver~MutationObserver#flush Flush} mutations, check if\n\t * a selection changes and fires {@link module:engine/view/document~Document#event:selectionChange} event on every change\n\t * and {@link module:engine/view/document~Document#event:selectionChangeDone} when a selection stop changing.\n\t *\n\t * @private\n\t * @param {Event} domEvent DOM event.\n\t * @param {Document} domDocument DOM document.\n\t */\n\t_handleSelectionChange( domEvent, domDocument ) {\n\t\tif ( !this.isEnabled ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domSelection = domDocument.defaultView.getSelection();\n\n\t\tif ( this.checkShouldIgnoreEventFromTarget( domSelection.anchorNode ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure the mutation event will be before selection event on all browsers.\n\t\tthis.mutationObserver.flush();\n\n\t\t// If there were mutations then the view will be re-rendered by the mutation observer and the selection\n\t\t// will be updated, so the selections will equal and the event will not be fired, as expected.\n\t\tconst newViewSelection = this.domConverter.domSelectionToView( domSelection );\n\n\t\t// Do not convert selection change if the new view selection has no ranges in it.\n\t\t//\n\t\t// It means that the DOM selection is in some way incorrect. Ranges that were in the DOM selection could not be\n\t\t// converted to the view. This happens when the DOM selection was moved outside of the editable element.\n\t\tif ( newViewSelection.rangeCount == 0 ) {\n\t\t\tthis.view.hasDomSelection = false;\n\n\t\t\treturn;\n\t\t}\n\n\t\tthis.view.hasDomSelection = true;\n\n\t\tif ( this.selection.isEqual( newViewSelection ) && this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure we are not in the infinite loop (#400).\n\t\t// This counter is reset each second. 60 selection changes in 1 second is enough high number\n\t\t// to be very difficult (impossible) to achieve using just keyboard keys (during normal editor use).\n\t\tif ( ++this._loopbackCounter > 60 ) {\n\t\t\t// Selection change observer detected an infinite rendering loop.\n\t\t\t// Most probably you try to put the selection in the position which is not allowed\n\t\t\t// by the browser and browser fixes it automatically what causes `selectionchange` event on\n\t\t\t// which a loopback through a model tries to re-render the wrong selection and again.\n\t\t\t//\n\t\t\t// @if CK_DEBUG // console.warn( 'Selection change observer detected an infinite rendering loop.' );\n\n\t\t\treturn;\n\t\t}\n\n\t\tif ( this.selection.isSimilar( newViewSelection ) ) {\n\t\t\t// If selection was equal and we are at this point of algorithm, it means that it was incorrect.\n\t\t\t// Just re-render it, no need to fire any events, etc.\n\t\t\tthis.view.forceRender();\n\t\t} else {\n\t\t\tconst data = {\n\t\t\t\toldSelection: this.selection,\n\t\t\t\tnewSelection: newViewSelection,\n\t\t\t\tdomSelection\n\t\t\t};\n\n\t\t\t// Prepare data for new selection and fire appropriate events.\n\t\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t\t// Call `#_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t\t}\n\t}\n\n\t/**\n\t * Clears `SelectionObserver` internal properties connected with preventing infinite loop.\n\t *\n\t * @protected\n\t */\n\t_clearInfiniteLoop() {\n\t\tthis._loopbackCounter = 0;\n\t}\n}\n\n/**\n * Fired when a selection has changed. This event is fired only when the selection change was the only change that happened\n * in the document, and the old selection is different then the new selection.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChange\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n\n/**\n * Fired when selection stops changing.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChangeDone\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/focusobserver\n */\n\n/* globals setTimeout, clearTimeout */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:focus Focus}\n * and {@link module:engine/view/document~Document#event:blur blur} events observer.\n * Focus observer handle also {@link module:engine/view/rooteditableelement~RootEditableElement#isFocused isFocused} property of the\n * {@link module:engine/view/rooteditableelement~RootEditableElement root elements}.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class FocusObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'focus', 'blur' ];\n\t\tthis.useCapture = true;\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'focus', () => {\n\t\t\tdocument.isFocused = true;\n\n\t\t\t// Unfortunately native `selectionchange` event is fired asynchronously.\n\t\t\t// We need to wait until `SelectionObserver` handle the event and then render. Otherwise rendering will\n\t\t\t// overwrite new DOM selection with selection from the view.\n\t\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/795 for more details.\n\t\t\t// Long timeout is needed to solve #676 and https://github.com/ckeditor/ckeditor5-engine/issues/1157 issues.\n\t\t\tthis._renderTimeoutId = setTimeout( () => view.forceRender(), 50 );\n\t\t} );\n\n\t\tdocument.on( 'blur', ( evt, data ) => {\n\t\t\tconst selectedEditable = document.selection.editableElement;\n\n\t\t\tif ( selectedEditable === null || selectedEditable === data.target ) {\n\t\t\t\tdocument.isFocused = false;\n\n\t\t\t\t// Re-render the document to update view elements.\n\t\t\t\tview.forceRender();\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * Identifier of the timeout currently used by focus listener to delay rendering execution.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} #_renderTimeoutId\n\t\t */\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tif ( this._renderTimeoutId ) {\n\t\t\tclearTimeout( this._renderTimeoutId );\n\t\t}\n\n\t\tsuper.destroy();\n\t}\n}\n\n/**\n * Fired when one of the editables gets focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:focus\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when one of the editables loses focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:blur\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/compositionobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:compositionstart Compositionstart},\n * {@link module:engine/view/document~Document#event:compositionupdate compositionupdate} and\n * {@link module:engine/view/document~Document#event:compositionend compositionend} events observer.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class CompositionObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'compositionstart', 'compositionupdate', 'compositionend' ];\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'compositionstart', () => {\n\t\t\tdocument.isComposing = true;\n\t\t} );\n\n\t\tdocument.on( 'compositionend', () => {\n\t\t\tdocument.isComposing = false;\n\t\t} );\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when composition starts inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionstart\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition is updated inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionupdate\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition ends inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionend\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/view/observer/inputobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * Observer for events connected with data input.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class InputObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'beforeinput' ];\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired before browser inputs (or deletes) some data.\n *\n * This event is available only on browsers which support DOM `beforeinput` event.\n *\n * Introduced by {@link module:engine/view/observer/inputobserver~InputObserver}.\n *\n * Note that because {@link module:engine/view/observer/inputobserver~InputObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/inputobserver~InputObserver\n * @event module:engine/view/document~Document#event:beforeinput\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","import baseGetTag from './_baseGetTag.js';\nimport isArray from './isArray.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar stringTag = '[object String]';\n\n/**\n * Checks if `value` is classified as a `String` primitive or object.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a string, else `false`.\n * @example\n *\n * _.isString('abc');\n * // => true\n *\n * _.isString(1);\n * // => false\n */\nfunction isString(value) {\n return typeof value == 'string' ||\n (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);\n}\n\nexport default isString;\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/createelement\n */\n\nimport isIterable from '../isiterable';\nimport { isString } from 'lodash-es';\n\n/**\n * Creates element with attributes and children.\n *\n *\t\tcreateElement( document, 'p' ); //

\n *\t\tcreateElement( document, 'p', { class: 'foo' } ); //

\n *\t\tcreateElement( document, 'p', null, 'foo' ); //

foo

\n *\t\tcreateElement( document, 'p', null, [ 'foo', createElement( document, 'img' ) ] ); //

foo

\n *\n * @param {Document} doc Document used to create element.\n * @param {String} name Name of the element.\n * @param {Object} [attributes] Object keys will become attributes keys and object values will became attributes values.\n * @param {Node|String|Array.} [children] Child or array of children. Strings will be automatically turned\n * into Text nodes.\n * @returns {Element} Created element.\n */\nexport default function createElement( doc, name, attributes = {}, children = [] ) {\n\tconst namespace = attributes && attributes.xmlns;\n\tconst element = namespace ? doc.createElementNS( namespace, name ) : doc.createElement( name );\n\n\tfor ( const key in attributes ) {\n\t\telement.setAttribute( key, attributes[ key ] );\n\t}\n\n\tif ( isString( children ) || !isIterable( children ) ) {\n\t\tchildren = [ children ];\n\t}\n\n\tfor ( let child of children ) {\n\t\tif ( isString( child ) ) {\n\t\t\tchild = doc.createTextNode( child );\n\t\t}\n\n\t\telement.appendChild( child );\n\t}\n\n\treturn element;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isrange\n */\n\n/**\n * Checks if the object is a native DOM Range.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isRange( obj ) {\n\treturn Object.prototype.toString.apply( obj ) == '[object Range]';\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getborderwidths\n */\n\n/**\n * Returns an object containing CSS border widths of a specified HTML element.\n *\n * @param {HTMLElement} element An element which has CSS borders.\n * @returns {Object} An object containing `top`, `left`, `right` and `bottom` properties\n * with numerical values of the `border-[top,left,right,bottom]-width` CSS styles.\n */\nexport default function getBorderWidths( element ) {\n\t// Call getComputedStyle on the window the element document belongs to.\n\tconst style = element.ownerDocument.defaultView.getComputedStyle( element );\n\n\treturn {\n\t\ttop: parseInt( style.borderTopWidth, 10 ),\n\t\tright: parseInt( style.borderRightWidth, 10 ),\n\t\tbottom: parseInt( style.borderBottomWidth, 10 ),\n\t\tleft: parseInt( style.borderLeftWidth, 10 )\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/rect\n */\n\nimport isRange from './isrange';\nimport isWindow from './iswindow';\nimport getBorderWidths from './getborderwidths';\nimport isText from './istext';\nimport { isElement } from 'lodash-es';\n\nconst rectProperties = [ 'top', 'right', 'bottom', 'left', 'width', 'height' ];\n\n/**\n * A helper class representing a `ClientRect` object, e.g. value returned by\n * the native `object.getBoundingClientRect()` method. Provides a set of methods\n * to manipulate the rect and compare it against other rect instances.\n */\nexport default class Rect {\n\t/**\n\t * Creates an instance of rect.\n\t *\n\t *\t\t// Rect of an HTMLElement.\n\t *\t\tconst rectA = new Rect( document.body );\n\t *\n\t *\t\t// Rect of a DOM Range.\n\t *\t\tconst rectB = new Rect( document.getSelection().getRangeAt( 0 ) );\n\t *\n\t *\t\t// Rect of a window (web browser viewport).\n\t *\t\tconst rectC = new Rect( window );\n\t *\n\t *\t\t// Rect out of an object.\n\t *\t\tconst rectD = new Rect( { top: 0, right: 10, bottom: 10, left: 0, width: 10, height: 10 } );\n\t *\n\t *\t\t// Rect out of another Rect instance.\n\t *\t\tconst rectE = new Rect( rectD );\n\t *\n\t *\t\t// Rect out of a ClientRect.\n\t *\t\tconst rectF = new Rect( document.body.getClientRects().item( 0 ) );\n\t *\n\t * **Note**: By default a rect of an HTML element includes its CSS borders and scrollbars (if any)\n\t * ant the rect of a `window` includes scrollbars too. Use {@link #excludeScrollbarsAndBorders}\n\t * to get the inner part of the rect.\n\t *\n\t * @param {HTMLElement|Range|Window|ClientRect|module:utils/dom/rect~Rect|Object} source A source object to create the rect.\n\t */\n\tconstructor( source ) {\n\t\tconst isSourceRange = isRange( source );\n\n\t\t/**\n\t\t * The object this rect is for.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {HTMLElement|Range|ClientRect|module:utils/dom/rect~Rect|Object} #_source\n\t\t */\n\t\tObject.defineProperty( this, '_source', {\n\t\t\t// If the source is a Rect instance, copy it's #_source.\n\t\t\tvalue: source._source || source,\n\t\t\twritable: true,\n\t\t\tenumerable: false\n\t\t} );\n\n\t\tif ( isElement( source ) || isSourceRange ) {\n\t\t\t// The `Rect` class depends on `getBoundingClientRect` and `getClientRects` DOM methods. If the source\n\t\t\t// of a rect in an HTML element or a DOM range but it does not belong to any rendered DOM tree, these methods\n\t\t\t// will fail to obtain the geometry and the rect instance makes little sense to the features using it.\n\t\t\t// To get rid of this warning make sure the source passed to the constructor is a descendant of `window.document.body`.\n\t\t\t// @if CK_DEBUG // const sourceNode = isSourceRange ? source.startContainer : source;\n\t\t\t// @if CK_DEBUG // if ( !sourceNode.ownerDocument || !sourceNode.ownerDocument.body.contains( sourceNode ) ) {\n\t\t\t// @if CK_DEBUG // \tconsole.warn(\n\t\t\t// @if CK_DEBUG // \t\t'rect-source-not-in-dom: The source of this rect does not belong to any rendered DOM tree.',\n\t\t\t// @if CK_DEBUG // \t\t{ source } );\n\t\t\t// @if CK_DEBUG // }\n\n\t\t\tif ( isSourceRange ) {\n\t\t\t\tconst rangeRects = Rect.getDomRangeRects( source );\n\t\t\t\tcopyRectProperties( this, Rect.getBoundingRect( rangeRects ) );\n\t\t\t} else {\n\t\t\t\tcopyRectProperties( this, source.getBoundingClientRect() );\n\t\t\t}\n\t\t} else if ( isWindow( source ) ) {\n\t\t\tconst { innerWidth, innerHeight } = source;\n\n\t\t\tcopyRectProperties( this, {\n\t\t\t\ttop: 0,\n\t\t\t\tright: innerWidth,\n\t\t\t\tbottom: innerHeight,\n\t\t\t\tleft: 0,\n\t\t\t\twidth: innerWidth,\n\t\t\t\theight: innerHeight\n\t\t\t} );\n\t\t} else {\n\t\t\tcopyRectProperties( this, source );\n\t\t}\n\n\t\t/**\n\t\t * The \"top\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #top\n\t\t */\n\n\t\t/**\n\t\t * The \"right\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #right\n\t\t */\n\n\t\t/**\n\t\t * The \"bottom\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #bottom\n\t\t */\n\n\t\t/**\n\t\t * The \"left\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #left\n\t\t */\n\n\t\t/**\n\t\t * The \"width\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #width\n\t\t */\n\n\t\t/**\n\t\t * The \"height\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #height\n\t\t */\n\t}\n\n\t/**\n\t * Returns a clone of the rect.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A cloned rect.\n\t */\n\tclone() {\n\t\treturn new Rect( this );\n\t}\n\n\t/**\n\t * Moves the rect so that its upper–left corner lands in desired `[ x, y ]` location.\n\t *\n\t * @param {Number} x Desired horizontal location.\n\t * @param {Number} y Desired vertical location.\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveTo( x, y ) {\n\t\tthis.top = y;\n\t\tthis.right = x + this.width;\n\t\tthis.bottom = y + this.height;\n\t\tthis.left = x;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves the rect in–place by a dedicated offset.\n\t *\n\t * @param {Number} x A horizontal offset.\n\t * @param {Number} y A vertical offset\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveBy( x, y ) {\n\t\tthis.top += y;\n\t\tthis.right += x;\n\t\tthis.left += x;\n\t\tthis.bottom += y;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns a new rect a a result of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {module:utils/dom/rect~Rect}\n\t */\n\tgetIntersection( anotherRect ) {\n\t\tconst rect = {\n\t\t\ttop: Math.max( this.top, anotherRect.top ),\n\t\t\tright: Math.min( this.right, anotherRect.right ),\n\t\t\tbottom: Math.min( this.bottom, anotherRect.bottom ),\n\t\t\tleft: Math.max( this.left, anotherRect.left )\n\t\t};\n\n\t\trect.width = rect.right - rect.left;\n\t\trect.height = rect.bottom - rect.top;\n\n\t\tif ( rect.width < 0 || rect.height < 0 ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\treturn new Rect( rect );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect [description]\n\t * @returns {Number} Area of intersection.\n\t */\n\tgetIntersectionArea( anotherRect ) {\n\t\tconst rect = this.getIntersection( anotherRect );\n\n\t\tif ( rect ) {\n\t\t\treturn rect.getArea();\n\t\t} else {\n\t\t\treturn 0;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of the rect.\n\t *\n\t * @returns {Number}\n\t */\n\tgetArea() {\n\t\treturn this.width * this.height;\n\t}\n\n\t/**\n\t * Returns a new rect, a part of the original rect, which is actually visible to the user,\n\t * e.g. an original rect cropped by parent element rects which have `overflow` set in CSS\n\t * other than `\"visible\"`.\n\t *\n\t * If there's no such visible rect, which is when the rect is limited by one or many of\n\t * the ancestors, `null` is returned.\n\t *\n\t * @returns {module:utils/dom/rect~Rect|null} A visible rect instance or `null`, if there's none.\n\t */\n\tgetVisible() {\n\t\tconst source = this._source;\n\t\tlet visibleRect = this.clone();\n\n\t\t// There's no ancestor to crop with the overflow.\n\t\tif ( !isBody( source ) ) {\n\t\t\tlet parent = source.parentNode || source.commonAncestorContainer;\n\n\t\t\t// Check the ancestors all the way up to the .\n\t\t\twhile ( parent && !isBody( parent ) ) {\n\t\t\t\tconst parentRect = new Rect( parent );\n\t\t\t\tconst intersectionRect = visibleRect.getIntersection( parentRect );\n\n\t\t\t\tif ( intersectionRect ) {\n\t\t\t\t\tif ( intersectionRect.getArea() < visibleRect.getArea() ) {\n\t\t\t\t\t\t// Reduce the visible rect to the intersection.\n\t\t\t\t\t\tvisibleRect = intersectionRect;\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\t// There's no intersection, the rect is completely invisible.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tparent = parent.parentNode;\n\t\t\t}\n\t\t}\n\n\t\treturn visibleRect;\n\t}\n\n\t/**\n\t * Checks if all property values ({@link #top}, {@link #left}, {@link #right},\n\t * {@link #bottom}, {@link #width} and {@link #height}) are the equal in both rect\n\t * instances.\n\t *\n\t * @param {module:utils/dom/rect~Rect} rect A rect instance to compare with.\n\t * @returns {Boolean} `true` when Rects are equal. `false` otherwise.\n\t */\n\tisEqual( anotherRect ) {\n\t\tfor ( const prop of rectProperties ) {\n\t\t\tif ( this[ prop ] !== anotherRect[ prop ] ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether a rect fully contains another rect instance.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {Boolean} `true` if contains, `false` otherwise.\n\t */\n\tcontains( anotherRect ) {\n\t\tconst intersectRect = this.getIntersection( anotherRect );\n\n\t\treturn !!( intersectRect && intersectRect.isEqual( anotherRect ) );\n\t}\n\n\t/**\n\t * Excludes scrollbars and CSS borders from the rect.\n\t *\n\t * * Borders are removed when {@link #_source} is an HTML element.\n\t * * Scrollbars are excluded from HTML elements and the `window`.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been updated.\n\t */\n\texcludeScrollbarsAndBorders() {\n\t\tconst source = this._source;\n\t\tlet scrollBarWidth, scrollBarHeight, direction;\n\n\t\tif ( isWindow( source ) ) {\n\t\t\tscrollBarWidth = source.innerWidth - source.document.documentElement.clientWidth;\n\t\t\tscrollBarHeight = source.innerHeight - source.document.documentElement.clientHeight;\n\t\t\tdirection = source.getComputedStyle( source.document.documentElement ).direction;\n\t\t} else {\n\t\t\tconst borderWidths = getBorderWidths( this._source );\n\n\t\t\tscrollBarWidth = source.offsetWidth - source.clientWidth - borderWidths.left - borderWidths.right;\n\t\t\tscrollBarHeight = source.offsetHeight - source.clientHeight - borderWidths.top - borderWidths.bottom;\n\t\t\tdirection = source.ownerDocument.defaultView.getComputedStyle( source ).direction;\n\n\t\t\tthis.left += borderWidths.left;\n\t\t\tthis.top += borderWidths.top;\n\t\t\tthis.right -= borderWidths.right;\n\t\t\tthis.bottom -= borderWidths.bottom;\n\t\t\tthis.width = this.right - this.left;\n\t\t\tthis.height = this.bottom - this.top;\n\t\t}\n\n\t\tthis.width -= scrollBarWidth;\n\n\t\tif ( direction === 'ltr' ) {\n\t\t\tthis.right -= scrollBarWidth;\n\t\t} else {\n\t\t\tthis.left += scrollBarWidth;\n\t\t}\n\n\t\tthis.height -= scrollBarHeight;\n\t\tthis.bottom -= scrollBarHeight;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns an array of rects of the given native DOM Range.\n\t *\n\t * @param {Range} range A native DOM range.\n\t * @returns {Array.} DOM Range rects.\n\t */\n\tstatic getDomRangeRects( range ) {\n\t\tconst rects = [];\n\t\t// Safari does not iterate over ClientRectList using for...of loop.\n\t\tconst clientRects = Array.from( range.getClientRects() );\n\n\t\tif ( clientRects.length ) {\n\t\t\tfor ( const rect of clientRects ) {\n\t\t\t\trects.push( new Rect( rect ) );\n\t\t\t}\n\t\t}\n\t\t// If there's no client rects for the Range, use parent container's bounding rect\n\t\t// instead and adjust rect's width to simulate the actual geometry of such range.\n\t\t// https://github.com/ckeditor/ckeditor5-utils/issues/153\n\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/317\n\t\telse {\n\t\t\tlet startContainer = range.startContainer;\n\n\t\t\tif ( isText( startContainer ) ) {\n\t\t\t\tstartContainer = startContainer.parentNode;\n\t\t\t}\n\n\t\t\tconst rect = new Rect( startContainer.getBoundingClientRect() );\n\t\t\trect.right = rect.left;\n\t\t\trect.width = 0;\n\n\t\t\trects.push( rect );\n\t\t}\n\n\t\treturn rects;\n\t}\n\n\t/**\n\t * Returns a bounding rectangle that contains all the given `rects`.\n\t *\n\t * @param {Iterable.} rects A list of rectangles that should be contained in the result rectangle.\n\t * @returns {module:utils/dom/rect~Rect|null} Bounding rectangle or `null` if no `rects` were given.\n\t */\n\tstatic getBoundingRect( rects ) {\n\t\tconst boundingRectData = {\n\t\t\tleft: Number.POSITIVE_INFINITY,\n\t\t\ttop: Number.POSITIVE_INFINITY,\n\t\t\tright: Number.NEGATIVE_INFINITY,\n\t\t\tbottom: Number.NEGATIVE_INFINITY\n\t\t};\n\t\tlet rectangleCount = 0;\n\n\t\tfor ( const rect of rects ) {\n\t\t\trectangleCount++;\n\n\t\t\tboundingRectData.left = Math.min( boundingRectData.left, rect.left );\n\t\t\tboundingRectData.top = Math.min( boundingRectData.top, rect.top );\n\t\t\tboundingRectData.right = Math.max( boundingRectData.right, rect.right );\n\t\t\tboundingRectData.bottom = Math.max( boundingRectData.bottom, rect.bottom );\n\t\t}\n\n\t\tif ( rectangleCount == 0 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tboundingRectData.width = boundingRectData.right - boundingRectData.left;\n\t\tboundingRectData.height = boundingRectData.bottom - boundingRectData.top;\n\n\t\treturn new Rect( boundingRectData );\n\t}\n}\n\n// Acquires all the rect properties from the passed source.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} rect\n// @param {ClientRect|module:utils/dom/rect~Rect|Object} source\nfunction copyRectProperties( rect, source ) {\n\tfor ( const p of rectProperties ) {\n\t\trect[ p ] = source[ p ];\n\t}\n}\n\n// Checks if provided object is a HTML element.\n//\n// @private\n// @param {HTMLElement|Range} elementOrRange\n// @returns {Boolean}\nfunction isBody( elementOrRange ) {\n\tif ( !isElement( elementOrRange ) ) {\n\t\treturn false;\n\t}\n\n\treturn elementOrRange === elementOrRange.ownerDocument.body;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/resizeobserver\n */\n\n/* globals setTimeout, clearTimeout */\n\nimport mix from '../mix';\nimport global from './global';\nimport Rect from './rect';\nimport DomEmitterMixin from './emittermixin';\n\nconst RESIZE_CHECK_INTERVAL = 100;\n\n/**\n * A helper class which instances allow performing custom actions when native DOM elements are resized.\n *\n *\t\tconst editableElement = editor.editing.view.getDomRoot();\n *\n *\t\tconst observer = new ResizeObserver( editableElement, entry => {\n *\t\t\tconsole.log( 'The editable element has been resized in DOM.' );\n *\t\t\tconsole.log( entry.target ); // -> editableElement\n *\t\t\tconsole.log( entry.contentRect.width ); // -> e.g. '423px'\n *\t\t} );\n *\n * By default, it uses the [native DOM resize observer](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver)\n * under the hood and in browsers that do not support the native API yet, a polyfilled observer is\n * used instead.\n */\nexport default class ResizeObserver {\n\t/**\n\t * Creates an instance of the `ResizeObserver` class.\n\t *\n\t * @param {HTMLElement} element A DOM element that is to be observed for resizing. Note that\n\t * the element must be visible (i.e. not detached from DOM) for the observer to work.\n\t * @param {Function} callback A function called when the observed element was resized. It passes\n\t * the [`ResizeObserverEntry`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserverEntry)\n\t * object with information about the resize event.\n\t */\n\tconstructor( element, callback ) {\n\t\t// **Note**: For the maximum performance, this class ensures only a single instance of the native\n\t\t// (or polyfilled) observer is used no matter how many instances of this class were created.\n\t\tif ( !ResizeObserver._observerInstance ) {\n\t\t\tResizeObserver._createObserver();\n\t\t}\n\n\t\t/**\n\t\t * The element observer by this observer.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {HTMLElement}\n\t\t */\n\t\tthis._element = element;\n\n\t\t/**\n\t\t * The callback executed each time {@link #_element} is resized.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {Function}\n\t\t */\n\t\tthis._callback = callback;\n\n\t\tResizeObserver._addElementCallback( element, callback );\n\t\tResizeObserver._observerInstance.observe( element );\n\t}\n\n\t/**\n\t * Destroys the observer which disables the `callback` passed to the {@link #constructor}.\n\t */\n\tdestroy() {\n\t\tResizeObserver._deleteElementCallback( this._element, this._callback );\n\t}\n\n\t/**\n\t * Registers a new resize callback for the DOM element.\n\t *\n\t * @private\n\t * @static\n\t * @param {HTMLElement} element\n\t * @param {Function} callback\n\t */\n\tstatic _addElementCallback( element, callback ) {\n\t\tif ( !ResizeObserver._elementCallbacks ) {\n\t\t\tResizeObserver._elementCallbacks = new Map();\n\t\t}\n\n\t\tlet callbacks = ResizeObserver._elementCallbacks.get( element );\n\n\t\tif ( !callbacks ) {\n\t\t\tcallbacks = new Set();\n\t\t\tResizeObserver._elementCallbacks.set( element, callbacks );\n\t\t}\n\n\t\tcallbacks.add( callback );\n\t}\n\n\t/**\n\t * Removes a resize callback from the DOM element. If no callbacks are left\n\t * for the element, it removes the element from the native observer.\n\t *\n\t * @private\n\t * @static\n\t * @param {HTMLElement} element\n\t * @param {Function} callback\n\t */\n\tstatic _deleteElementCallback( element, callback ) {\n\t\tconst callbacks = ResizeObserver._getElementCallbacks( element );\n\n\t\t// Remove the element callback. Check if exist first in case someone\n\t\t// called destroy() twice.\n\t\tif ( callbacks ) {\n\t\t\tcallbacks.delete( callback );\n\n\t\t\t// If no callbacks left for the element, also remove the element.\n\t\t\tif ( !callbacks.size ) {\n\t\t\t\tResizeObserver._elementCallbacks.delete( element );\n\t\t\t\tResizeObserver._observerInstance.unobserve( element );\n\t\t\t}\n\t\t}\n\n\t\tif ( ResizeObserver._elementCallbacks && !ResizeObserver._elementCallbacks.size ) {\n\t\t\tResizeObserver._observerInstance = null;\n\t\t\tResizeObserver._elementCallbacks = null;\n\t\t}\n\t}\n\n\t/**\n\t * Returns are registered resize callbacks for the DOM element.\n\t *\n\t * @private\n\t * @static\n\t * @param {HTMLElement} element\n\t * @returns {Set.|null}\n\t */\n\tstatic _getElementCallbacks( element ) {\n\t\tif ( !ResizeObserver._elementCallbacks ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn ResizeObserver._elementCallbacks.get( element );\n\t}\n\n\t/**\n\t * Creates the single native observer shared across all `ResizeObserver` instances.\n\t * If the browser does not support the native API, it creates a polyfill.\n\t *\n\t * @private\n\t * @static\n\t */\n\tstatic _createObserver() {\n\t\tlet ObserverConstructor;\n\n\t\t// TODO: One day, the `ResizeObserver` API will be supported in all modern web browsers.\n\t\t// When it happens, this module will no longer make sense and should be removed and\n\t\t// the native implementation should be used across the project to save bytes.\n\t\t// Check out https://caniuse.com/#feat=resizeobserver.\n\t\tif ( typeof global.window.ResizeObserver === 'function' ) {\n\t\t\tObserverConstructor = global.window.ResizeObserver;\n\t\t} else {\n\t\t\tObserverConstructor = ResizeObserverPolyfill;\n\t\t}\n\n\t\tResizeObserver._observerInstance = new ObserverConstructor( entries => {\n\t\t\tfor ( const entry of entries ) {\n\t\t\t\tconst callbacks = ResizeObserver._getElementCallbacks( entry.target );\n\n\t\t\t\tif ( callbacks ) {\n\t\t\t\t\tfor ( const callback of callbacks ) {\n\t\t\t\t\t\tcallback( entry );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n\n/**\n * The single native observer instance (or polyfill in browsers that do not support the API)\n * shared across all {@link module:utils/dom/resizeobserver~ResizeObserver} instances.\n *\n * @static\n * @protected\n * @readonly\n * @property {Object|null} module:utils/dom/resizeobserver~ResizeObserver#_observerInstance\n */\nResizeObserver._observerInstance = null;\n\n/**\n * A mapping of native DOM elements and their callbacks shared across all\n * {@link module:utils/dom/resizeobserver~ResizeObserver} instances.\n *\n * @static\n * @private\n * @readonly\n * @property {Map.|null} module:utils/dom/resizeobserver~ResizeObserver#_elementCallbacks\n */\nResizeObserver._elementCallbacks = null;\n\n/**\n * A polyfill class for the native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver).\n *\n * @private\n * @mixes module:utils/domemittermixin~DomEmitterMixin\n */\nclass ResizeObserverPolyfill {\n\t/**\n\t * Creates an instance of the {@link module:utils/dom/resizeobserver~ResizeObserverPolyfill} class.\n\t *\n\t * It synchronously reacts to resize of the window to check if observed elements' geometry changed.\n\t *\n\t * Additionally, the polyfilled observer uses a timeout to check if observed elements' geometry has changed\n\t * in some other way (dynamic layouts, scrollbars showing up, etc.), so its response can also be asynchronous.\n\t *\n\t * @param {Function} callback A function called when any observed element was resized. Refer to the\n\t * native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) API to\n\t * learn more.\n\t */\n\tconstructor( callback ) {\n\t\t/**\n\t\t * A function called when any observed {@link #_elements element} was resized.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Function}\n\t\t */\n\t\tthis._callback = callback;\n\n\t\t/**\n\t\t * DOM elements currently observed by the observer instance.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Set}\n\t\t */\n\t\tthis._elements = new Set();\n\n\t\t/**\n\t\t * Cached DOM {@link #_elements elements} bounding rects to compare to upon the next check.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Map.}\n\t\t */\n\t\tthis._previousRects = new Map();\n\n\t\t/**\n\t\t * An UID of the current timeout upon which the observed elements rects\n\t\t * will be compared to the {@link #_previousRects previous rects} from the past.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Map.}\n\t\t */\n\t\tthis._periodicCheckTimeout = null;\n\t}\n\n\t/**\n\t * Starts observing a DOM element.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/observe).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tobserve( element ) {\n\t\tthis._elements.add( element );\n\n\t\tthis._checkElementRectsAndExecuteCallback();\n\n\t\tif ( this._elements.size === 1 ) {\n\t\t\tthis._startPeriodicCheck();\n\t\t}\n\t}\n\n\t/**\n\t * Stops observing a DOM element.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/unobserve).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tunobserve( element ) {\n\t\tthis._elements.delete( element );\n\t\tthis._previousRects.delete( element );\n\n\t\tif ( !this._elements.size ) {\n\t\t\tthis._stopPeriodicCheck();\n\t\t}\n\t}\n\n\t/**\n\t * When called, the observer calls the {@link #_callback resize callback} for all observed\n\t * {@link #_elements elements} but also starts checking periodically for changes in the elements' geometry.\n\t * If some are detected, {@link #_callback resize callback} is called for relevant elements that were resized.\n\t *\n\t * @protected\n\t */\n\t_startPeriodicCheck() {\n\t\tconst periodicCheck = () => {\n\t\t\tthis._checkElementRectsAndExecuteCallback();\n\t\t\tthis._periodicCheckTimeout = setTimeout( periodicCheck, RESIZE_CHECK_INTERVAL );\n\t\t};\n\n\t\tthis.listenTo( global.window, 'resize', () => {\n\t\t\tthis._checkElementRectsAndExecuteCallback();\n\t\t} );\n\n\t\tthis._periodicCheckTimeout = setTimeout( periodicCheck, RESIZE_CHECK_INTERVAL );\n\t}\n\n\t/**\n\t * Stops checking for changes in all observed {@link #_elements elements} geometry.\n\t *\n\t * @protected\n\t */\n\t_stopPeriodicCheck() {\n\t\tclearTimeout( this._periodicCheckTimeout );\n\t\tthis.stopListening();\n\t\tthis._previousRects.clear();\n\t}\n\n\t/**\n\t * Checks if the geometry of any of the {@link #_elements element} has changed. If so, executes\n\t * the {@link #_callback resize callback} with element geometry data.\n\t *\n\t * @protected\n\t */\n\t_checkElementRectsAndExecuteCallback() {\n\t\tconst entries = [];\n\n\t\tfor ( const element of this._elements ) {\n\t\t\tif ( this._hasRectChanged( element ) ) {\n\t\t\t\tentries.push( {\n\t\t\t\t\ttarget: element,\n\t\t\t\t\tcontentRect: this._previousRects.get( element )\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\tif ( entries.length ) {\n\t\t\tthis._callback( entries );\n\t\t}\n\t}\n\n\t/**\n\t * Compares the DOM element geometry to the {@link #_previousRects cached geometry} from the past.\n\t * Returns `true` if geometry has changed or the element is checked for the first time.\n\t *\n\t * @protected\n\t * @param {HTMLElement} element\n\t * @returns {Boolean}\n\t */\n\t_hasRectChanged( element ) {\n\t\tif ( !element.ownerDocument.body.contains( element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst currentRect = new Rect( element );\n\t\tconst previousRect = this._previousRects.get( element );\n\n\t\t// The first check should always yield true despite no Previous rect to compare to.\n\t\t// The native ResizeObserver does that and... that makes sense. Sort of.\n\t\tconst hasChanged = !previousRect || !previousRect.isEqual( currentRect );\n\n\t\tthis._previousRects.set( element, currentRect );\n\n\t\treturn hasChanged;\n\t}\n}\n\nmix( ResizeObserverPolyfill, DomEmitterMixin );\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/setdatainelement\n */\n\n/* globals HTMLTextAreaElement */\n\n/**\n * Sets data in a given element.\n *\n * @param {HTMLElement} el The element in which the data will be set.\n * @param {String} data The data string.\n */\nexport default function setDataInElement( el, data ) {\n\tif ( el instanceof HTMLTextAreaElement ) {\n\t\tel.value = data;\n\t}\n\n\tel.innerHTML = data;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/tounit\n */\n\n/**\n * Returns a helper function, which adds a desired trailing\n * `unit` to the passed value.\n *\n * @param {String} unit An unit like \"px\" or \"em\".\n * @returns {module:utils/dom/tounit~helper}\n */\nexport default function toUnit( unit ) {\n\t/**\n\t * A function, which adds a pre–defined trailing `unit`\n\t * to the passed `value`.\n\t *\n\t * @function helper\n \t * @param {*} value A value to be given the unit.\n \t * @returns {String} A value with the trailing unit.\n\t */\n\treturn value => value + unit;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/first\n */\n\n/**\n * Returns first item of the given `iterable`.\n *\n * @param {Iterable.<*>} iterable\n * @returns {*}\n */\nexport default function first( iterable ) {\n\tconst iteratorItem = iterable.next();\n\n\tif ( iteratorItem.done ) {\n\t\treturn null;\n\t}\n\n\treturn iteratorItem.value;\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* global setTimeout, clearTimeout */\n\n/**\n * @module utils/focustracker\n */\n\nimport DomEmitterMixin from './dom/emittermixin';\nimport ObservableMixin from './observablemixin';\nimport CKEditorError from './ckeditorerror';\nimport mix from './mix';\n\n/**\n * Allows observing a group of `HTMLElement`s whether at least one of them is focused.\n *\n * Used by the {@link module:core/editor/editor~Editor} in order to track whether the focus is still within the application,\n * or were used outside of its UI.\n *\n * **Note** `focus` and `blur` listeners use event capturing, so it is only needed to register wrapper `HTMLElement`\n * which contain other `focusable` elements. But note that this wrapper element has to be focusable too\n * (have e.g. `tabindex=\"-1\"`).\n *\n * Check out the {@glink framework/guides/deep-dive/ui/focus-tracking \"Deep dive into focus tracking\" guide} to learn more.\n *\n * @mixes module:utils/dom/emittermixin~EmitterMixin\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class FocusTracker {\n\tconstructor() {\n\t\t/**\n\t\t * True when one of the registered elements is focused.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * The currently focused element.\n\t\t *\n\t\t * While {@link #isFocused `isFocused`} remains `true`, the focus can\n\t\t * move between different UI elements. This property tracks those\n\t\t * elements and tells which one is currently focused.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {HTMLElement|null} #focusedElement\n\t\t */\n\t\tthis.set( 'focusedElement', null );\n\n\t\t/**\n\t\t * List of registered elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Set.}\n\t\t */\n\t\tthis._elements = new Set();\n\n\t\t/**\n\t\t * Event loop timeout.\n\t\t *\n\t\t * @private\n\t\t * @member {Number}\n\t\t */\n\t\tthis._nextEventLoopTimeout = null;\n\t}\n\n\t/**\n\t * Starts tracking the specified element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tadd( element ) {\n\t\tif ( this._elements.has( element ) ) {\n\t\t\t/**\n\t\t\t * This element is already tracked by {@link module:utils/focustracker~FocusTracker}.\n\t\t\t *\n\t\t\t * @error focustracker-add-element-already-exist\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'focustracker-add-element-already-exist', this );\n\t\t}\n\n\t\tthis.listenTo( element, 'focus', () => this._focus( element ), { useCapture: true } );\n\t\tthis.listenTo( element, 'blur', () => this._blur(), { useCapture: true } );\n\t\tthis._elements.add( element );\n\t}\n\n\t/**\n\t * Stops tracking the specified element and stops listening on this element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tremove( element ) {\n\t\tif ( element === this.focusedElement ) {\n\t\t\tthis._blur( element );\n\t\t}\n\n\t\tif ( this._elements.has( element ) ) {\n\t\t\tthis.stopListening( element );\n\t\t\tthis._elements.delete( element );\n\t\t}\n\t}\n\n\t/**\n\t * Destroys the focus tracker by:\n\t * - Disabling all event listeners attached to tracked elements.\n\t * - Removing all tracked elements that were previously added.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Stores currently focused element and set {#isFocused} as `true`.\n\t *\n\t * @private\n\t * @param {HTMLElement} element Element which has been focused.\n\t */\n\t_focus( element ) {\n\t\tclearTimeout( this._nextEventLoopTimeout );\n\n\t\tthis.focusedElement = element;\n\t\tthis.isFocused = true;\n\t}\n\n\t/**\n\t * Clears currently focused element and set {@link #isFocused} as `false`.\n\t * This method uses `setTimeout` to change order of fires `blur` and `focus` events.\n\t *\n\t * @private\n\t * @fires blur\n\t */\n\t_blur() {\n\t\tclearTimeout( this._nextEventLoopTimeout );\n\n\t\tthis._nextEventLoopTimeout = setTimeout( () => {\n\t\t\tthis.focusedElement = null;\n\t\t\tthis.isFocused = false;\n\t\t}, 0 );\n\t}\n\n\t/**\n\t * @event focus\n\t */\n\n\t/**\n\t * @event blur\n\t */\n}\n\nmix( FocusTracker, DomEmitterMixin );\nmix( FocusTracker, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/keystrokehandler\n */\n\nimport DomEmitterMixin from './dom/emittermixin';\nimport { getCode, parseKeystroke } from './keyboard';\n\n/**\n * Keystroke handler allows registering callbacks for given keystrokes.\n *\n * The most frequent use of this class is through the {@link module:core/editor/editor~Editor#keystrokes `editor.keystrokes`}\n * property. It allows listening to keystrokes executed in the editing view:\n *\n *\t\teditor.keystrokes.set( 'Ctrl+A', ( keyEvtData, cancel ) => {\n *\t\t\tconsole.log( 'Ctrl+A has been pressed' );\n *\t\t\tcancel();\n *\t\t} );\n *\n * However, this utility class can be used in various part of the UI. For instance, a certain {@link module:ui/view~View}\n * can use it like this:\n *\n *\t\tclass MyView extends View {\n *\t\t\tconstructor() {\n *\t\t\t\tthis.keystrokes = new KeystrokeHandler();\n *\n * \t\t\t\tthis.keystrokes.set( 'tab', handleTabKey );\n *\t\t\t}\n *\n *\t\t\trender() {\n *\t\t\t\tsuper.render();\n *\n *\t\t\t\tthis.keystrokes.listenTo( this.element );\n *\t\t\t}\n *\t\t}\n *\n * That keystroke handler will listen to `keydown` events fired in this view's main element.\n *\n */\nexport default class KeystrokeHandler {\n\t/**\n\t * Creates an instance of the keystroke handler.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Listener used to listen to events for easier keystroke handler destruction.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:utils/dom/emittermixin~Emitter}\n\t\t */\n\t\tthis._listener = Object.create( DomEmitterMixin );\n\t}\n\n\t/**\n\t * Starts listening for `keydown` events from a given emitter.\n\t *\n\t * @param {module:utils/emittermixin~Emitter} emitter\n\t */\n\tlistenTo( emitter ) {\n\t\t// The #_listener works here as a kind of dispatcher. It groups the events coming from the same\n\t\t// keystroke so the listeners can be attached to them with different priorities.\n\t\t//\n\t\t// E.g. all the keystrokes with the `keyCode` of 42 coming from the `emitter` are propagated\n\t\t// as a `_keydown:42` event by the `_listener`. If there's a callback created by the `set`\n\t\t// method for this 42 keystroke, it listens to the `_listener#_keydown:42` event only and interacts\n\t\t// only with other listeners of this particular event, thus making it possible to prioritize\n\t\t// the listeners and safely cancel execution, when needed. Instead of duplicating the Emitter logic,\n\t\t// the KeystrokeHandler re–uses it to do its job.\n\t\tthis._listener.listenTo( emitter, 'keydown', ( evt, keyEvtData ) => {\n\t\t\tthis._listener.fire( '_keydown:' + getCode( keyEvtData ), keyEvtData );\n\t\t} );\n\t}\n\n\t/**\n\t * Registers a handler for the specified keystroke.\n\t *\n\t * @param {String|Array.} keystroke Keystroke defined in a format accepted by\n\t * the {@link module:utils/keyboard~parseKeystroke} function.\n\t * @param {Function} callback A function called with the\n\t * {@link module:engine/view/observer/keyobserver~KeyEventData key event data} object and\n\t * a helper funcion to call both `preventDefault()` and `stopPropagation()` on the underlying event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of the keystroke\n\t * callback. The higher the priority value the sooner the callback will be executed. Keystrokes having the same priority\n\t * are called in the order they were added.\n\t */\n\tset( keystroke, callback, options = {} ) {\n\t\tconst keyCode = parseKeystroke( keystroke );\n\t\tconst priority = options.priority;\n\n\t\t// Execute the passed callback on KeystrokeHandler#_keydown.\n\t\t// TODO: https://github.com/ckeditor/ckeditor5-utils/issues/144\n\t\tthis._listener.listenTo( this._listener, '_keydown:' + keyCode, ( evt, keyEvtData ) => {\n\t\t\tcallback( keyEvtData, () => {\n\t\t\t\t// Stop the event in the DOM: no listener in the web page\n\t\t\t\t// will be triggered by this event.\n\t\t\t\tkeyEvtData.preventDefault();\n\t\t\t\tkeyEvtData.stopPropagation();\n\n\t\t\t\t// Stop the event in the KeystrokeHandler: no more callbacks\n\t\t\t\t// will be executed for this keystroke.\n\t\t\t\tevt.stop();\n\t\t\t} );\n\n\t\t\t// Mark this keystroke as handled by the callback. See: #press.\n\t\t\tevt.return = true;\n\t\t}, { priority } );\n\t}\n\n\t/**\n\t * Triggers a keystroke handler for a specified key combination, if such a keystroke was {@link #set defined}.\n\t *\n\t * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEvtData Key event data.\n\t * @returns {Boolean} Whether the keystroke was handled.\n\t */\n\tpress( keyEvtData ) {\n\t\treturn !!this._listener.fire( '_keydown:' + getCode( keyEvtData ), keyEvtData );\n\t}\n\n\t/**\n\t * Destroys the keystroke handler.\n\t */\n\tdestroy() {\n\t\tthis._listener.stopListening();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/arrowkeysobserver\n */\n\nimport Observer from './observer';\nimport BubblingEventInfo from './bubblingeventinfo';\n\nimport { isArrowKeyCode } from '@ckeditor/ckeditor5-utils';\n\n/**\n * Arrow keys observer introduces the {@link module:engine/view/document~Document#event:arrowKey `Document#arrowKey`} event.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class ArrowKeysObserver extends Observer {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.document.on( 'keydown', ( event, data ) => {\n\t\t\tif ( this.isEnabled && isArrowKeyCode( data.keyCode ) ) {\n\t\t\t\tconst eventInfo = new BubblingEventInfo( this.document, 'arrowKey', this.document.selection.getFirstRange() );\n\n\t\t\t\tthis.document.fire( eventInfo, data );\n\n\t\t\t\tif ( eventInfo.stop.called ) {\n\t\t\t\t\tevent.stop();\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {}\n}\n\n/**\n * Event fired when the user presses an arrow keys.\n *\n * Introduced by {@link module:engine/view/observer/arrowkeysobserver~ArrowKeysObserver}.\n *\n * Note that because {@link module:engine/view/observer/arrowkeysobserver~ArrowKeysObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @event module:engine/view/document~Document#event:arrowKey\n * @param {module:engine/view/observer/domeventdata~DomEventData} data\n */\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/scroll\n */\n\nimport isRange from './isrange';\nimport Rect from './rect';\nimport isText from './istext';\n\nconst utils = {};\n\n/**\n * Makes any page `HTMLElement` or `Range` (`target`) visible inside the browser viewport.\n * This helper will scroll all `target` ancestors and the web browser viewport to reveal the target to\n * the user. If the `target` is already visible, nothing will happen.\n *\n * @param {HTMLElement|Range} options.target A target, which supposed to become visible to the user.\n * @param {Number} [options.viewportOffset] An offset from the edge of the viewport (in pixels)\n * the `target` will be moved by when the viewport is scrolled. It enhances the user experience\n * by keeping the `target` some distance from the edge of the viewport and thus making it easier to\n * read or edit by the user.\n */\nexport function scrollViewportToShowTarget( { target, viewportOffset = 0 } ) {\n\tconst targetWindow = getWindow( target );\n\tlet currentWindow = targetWindow;\n\tlet currentFrame = null;\n\n\t// Iterate over all windows, starting from target's parent window up to window#top.\n\twhile ( currentWindow ) {\n\t\tlet firstAncestorToScroll;\n\n\t\t// Let's scroll target's ancestors first to reveal it. Then, once the ancestor scrolls\n\t\t// settled down, the algorithm can eventually scroll the viewport of the current window.\n\t\t//\n\t\t// Note: If the current window is target's **original** window (e.g. the first one),\n\t\t// start scrolling the closest parent of the target. If not, scroll the closest parent\n\t\t// of an iframe that resides in the current window.\n\t\tif ( currentWindow == targetWindow ) {\n\t\t\tfirstAncestorToScroll = getParentElement( target );\n\t\t} else {\n\t\t\tfirstAncestorToScroll = getParentElement( currentFrame );\n\t\t}\n\n\t\t// Scroll the target's ancestors first. Once done, scrolling the viewport is easy.\n\t\tscrollAncestorsToShowRect( firstAncestorToScroll, () => {\n\t\t\t// Note: If the target does not belong to the current window **directly**,\n\t\t\t// i.e. it resides in an iframe belonging to the window, obtain the target's rect\n\t\t\t// in the coordinates of the current window. By default, a Rect returns geometry\n\t\t\t// relative to the current window's viewport. To make it work in a parent window,\n\t\t\t// it must be shifted.\n\t\t\treturn getRectRelativeToWindow( target, currentWindow );\n\t\t} );\n\n\t\t// Obtain the rect of the target after it has been scrolled within its ancestors.\n\t\t// It's time to scroll the viewport.\n\t\tconst targetRect = getRectRelativeToWindow( target, currentWindow );\n\n\t\tscrollWindowToShowRect( currentWindow, targetRect, viewportOffset );\n\n\t\tif ( currentWindow.parent != currentWindow ) {\n\t\t\t// Keep the reference to the