From a93c35a3befb4e6bb6f8a61e84d55f17681f7c77 Mon Sep 17 00:00:00 2001
From: Ivan Kljun <ivan@scinote.net>
Date: Tue, 17 Oct 2023 16:49:19 +0200
Subject: [PATCH] Add a listener for when TinyMCE is opened and adjust headers
 [SCI-9449]

---
 app/javascript/packs/tiny_mce.js              | 19 ++--
 .../vue/mixins/stackableHeadersMixin.js       | 89 +++++++++++++++++--
 2 files changed, 95 insertions(+), 13 deletions(-)

diff --git a/app/javascript/packs/tiny_mce.js b/app/javascript/packs/tiny_mce.js
index d93fce4b5..3c73ede79 100644
--- a/app/javascript/packs/tiny_mce.js
+++ b/app/javascript/packs/tiny_mce.js
@@ -178,10 +178,12 @@ window.TinyMCE = (() => {
       if (typeof tinyMCE !== 'undefined') {
         // Hide element containing HTML view of RTE field
         const tinyMceContainer = $(selector).closest('form').find('.tinymce-view');
+        const editorForm = $(selector).closest('form');
         const tinyMceInitSize = tinyMceContainer.height();
-        $(selector).closest('.form-group, .tinymce-editor-container')
-          .before(`<div class="tinymce-placeholder" style="height:${tinyMceInitSize}px"></div>`);
+
+        editorForm.parent().height(tinyMceInitSize);
         tinyMceContainer.addClass('hidden');
+
         const plugins = `
           image table autosave autoresize link advlist codesample code autolink lists
           charmap anchor searchreplace wordcount visualblocks visualchars
@@ -301,11 +303,14 @@ window.TinyMCE = (() => {
             const editorForm = editorContainer.closest('form');
             const menuBar = editorForm.find('.tox-menubar');
 
-            $('.tinymce-placeholder').css('height', `${$(editor.editorContainer).height()}px`);
-            setTimeout(() => {
-              editorContainer.addClass('tox-tinymce--loaded');
-              $('.tinymce-placeholder').remove();
-            }, 400);
+            editorContainer.addClass('tox-tinymce--loaded');
+            const event = new CustomEvent('tinyMCEOpened', {
+              detail: {
+                target: editorForm.parent(),
+              }
+            });
+            window.dispatchEvent(event);
+            editorForm.parent().css('height', '');
 
             // Init saved status label
             if (editor.getContent() !== '') {
diff --git a/app/javascript/vue/mixins/stackableHeadersMixin.js b/app/javascript/vue/mixins/stackableHeadersMixin.js
index b5e14b3b0..4477b2ce3 100644
--- a/app/javascript/vue/mixins/stackableHeadersMixin.js
+++ b/app/javascript/vue/mixins/stackableHeadersMixin.js
@@ -22,20 +22,97 @@ export default {
   mounted() {
     this.secondaryNavigation = document.querySelector('#taskSecondaryMenu');
 
-    this.resizeObserver = new ResizeObserver((entries) => {
-      entries.forEach((entry) => {
-        this.taskSecondaryMenuHeight = entry.target.offsetHeight;
+    if (this.secondaryNavigation) {
+      this.resizeObserver = new ResizeObserver((entries) => {
+        entries.forEach((entry) => {
+          this.taskSecondaryMenuHeight = entry.target.offsetHeight;
+        });
       });
-    });
 
-    this.resizeObserver.observe(this.secondaryNavigation);
+      this.resizeObserver.observe(this.secondaryNavigation);
+    }
+    window.addEventListener('tinyMCEOpened', (e) => {
+      this.handleTinyMCEOpened(e.detail.target);
+    });
   },
   beforeDestroy() {
     if (this.resizeObserver) {
       this.resizeObserver.disconnect();
     }
+    window.removeEventListener('tinyMCEOpened', this.handleTinyMCEOpened);
   },
   methods: {
+    handleTinyMCEOpened(target) {
+      const getVisibleHeight = (elemTop, elemHeight) => {
+        let visibleHeight = 0;
+        if (elemTop >= 0) {
+          visibleHeight = Math.min(elemHeight, window.innerHeight - elemTop);
+        } else if (elemTop + elemHeight > 0) {
+          visibleHeight = elemTop + elemHeight;
+        }
+        return visibleHeight;
+      };
+
+      let headerHeight = 0;
+      let headerTop = 0;
+      let secondaryNavigationHeight = 0;
+      let secondaryNavigationTop = 0;
+
+      if (this.headerRef) {
+        headerHeight = this.headerRef.offsetHeight;
+        headerTop = this.headerRef.getBoundingClientRect().top;
+      }
+
+      if (this.secondaryNavigation) {
+        secondaryNavigationHeight = this.secondaryNavigation.offsetHeight;
+        secondaryNavigationTop = this.secondaryNavigation.getBoundingClientRect().top;
+      }
+
+      const editorHeaderTop = target.offset().top;
+      let totalHeight = 0;
+
+      const visibleHeaderHeight = getVisibleHeight(headerTop, headerHeight);
+      if (headerTop + visibleHeaderHeight < editorHeaderTop) {
+        totalHeight += visibleHeaderHeight;
+      }
+
+      const visibleSecondaryNavHeight = getVisibleHeight(secondaryNavigationTop, secondaryNavigationHeight);
+      if (secondaryNavigationTop + visibleSecondaryNavHeight < editorHeaderTop) {
+        totalHeight += visibleSecondaryNavHeight;
+      }
+
+      const editorHeader = $('.tox-editor-header');
+
+      // For Protocol Templates only reset the left value
+      if (!this.headerRef && !this.secondaryNavigation) {
+        editorHeader.css('left', '');
+        return;
+      }
+
+      // Handle opening TinyMCE toolbars when only a small bottom area of editor is visible
+      const targetBottom = target[0].getBoundingClientRect().bottom;
+      if (targetBottom < 3 * headerHeight) {
+        $('html, body').animate({
+          scrollTop: target.offset().top,
+        }, 800);
+        return;
+      }
+
+      // Handle showing TinyMCE toolbar for fixed/static position of toolbar
+      if (editorHeader.css('position') === 'fixed') {
+        editorHeader.css({
+          top: totalHeight - 1,
+          left: '',
+        });
+      } else if (headerTop < (visibleHeaderHeight + visibleSecondaryNavHeight)
+        && target[0].getBoundingClientRect().top <= headerTop) {
+        $('html, body').animate({
+              scrollTop: editorHeader.offset().top
+          }, 800);
+      }
+
+      target.focus();
+    },
     initStackableHeaders() {
       const header = this.headerRef;
       const headerHeight = header.offsetHeight;
@@ -93,7 +170,7 @@ export default {
       // Apply TinyMCE offset
       $('.tox-editor-header').css(
         'top',
-        stickyNavigationHeight + parseInt($(this.secondaryNavigation).css('top'), 10)
+        stickyNavigationHeight + parseInt($(this.secondaryNavigation).css('top'), 10) - 1,
       );
       this.lastScrollTop = window.scrollY; // Save last scroll position to when user scroll up/down
     },