scinote-web/app/assets/javascripts/select2_customization.js

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JavaScript
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/* global PerfectScrollbar */
$.fn.extend({
select2Multiple: function(config = {}) {
var placeholder;
var templateSelection;
var select2;
var templateResult;
if (this.length === 0) return this;
// Adding ID to each block
placeholder = this[0].dataset.placeholder || '';
if (this.next().find('.select2-selection').length > 0) return this;
templateSelection = (state, parent) => {
if (config.colorField !== undefined) {
parent.css('background', state[config.colorField] || state.element.dataset[config.colorField]);
}
return $('<span class="select2-block-body" data-select-id="' + state.id + '">'
+ (config.customSelection !== undefined ? config.customSelection(state) : state.text)
+ '</span>');
};
templateResult = (state) => {
if (config.templateResult) {
return config.templateResult(state);
}
return state.text;
};
select2 = this.select2({
multiple: true,
ajax: config.ajax,
placeholder: placeholder,
templateSelection: templateSelection,
templateResult: templateResult,
closeOnSelect: config.closeOnSelect || false,
tags: config.dynamicCreation || false,
tokenSeparators: config.dynamicCreationDelimiter || [','],
sorter: function(data) {
if (data.length === 0) return data;
return data.sort(function(a, b) {
var from = a.text.toLowerCase();
var to = b.text.toLowerCase();
var result = 0;
if (from > to) {
result = 1;
} else if (from < to) {
result = -1;
}
return result;
});
}
});
// Add dynamic size
select2.next().css('width', '100%');
// Placeholder fix for ajax fields
if (config.ajax) {
setTimeout(() => {
select2.next().find('.select2-search__field').css(
'width', config.placeholderSize || 'auto'
);
}, 0);
}
// Check that group select correctly
function select2CheckGroups() {
var select2Object = $('select[data-select-by-group="true"][data-open-dropdown="true"]');
var groups = $('.select2-dropdown').find('.select2-results__group');
$.each(groups, (i, e) => {
var groupChildrens = $(select2Object).find('optgroup[label="' + e.innerHTML + '"] option');
$(e).parent()[0].dataset.customGroup = 'true';
$(e).parent()[0].dataset.toogle = 'none';
if ($(select2Object).find('optgroup[label="' + e.innerHTML + '"] option:selected').length === groupChildrens.length) {
$(e).parent()[0].dataset.toogle = 'all';
}
});
}
function select2ScrollToSelectedElement() {
var activeElement;
var sel = $('.select2-results .select2-results__option[role="treeitem"]');
var parent;
var activeElementTopPosition;
var parentActiveElementTopPosition;
var fullTopPosition;
var containerRealPosition;
var containerScrollPosition = $('.select2-results__options').scrollTop();
var containerHeight = $('.select2-results__options').height();
if ($('.select2-results').length > 0 && $('.select2-results')[0].dataset.lastSelected !== 'false') {
activeElement = sel[parseInt($('.select2-results')[0].dataset.lastSelected, 10)];
} else {
return;
}
parent = $(activeElement).parents('.select2-results__option[role="group"]');
if (parent.length === 0) return;
activeElementTopPosition = $(activeElement).position().top;
parentActiveElementTopPosition = parent.position().top;
fullTopPosition = activeElementTopPosition + parentActiveElementTopPosition;
containerRealPosition = containerScrollPosition - containerHeight;
$('.select2-results__options').scrollTop(fullTopPosition + containerRealPosition + 130);
}
// listen for keyups dropdown
$('body').off('keyup', '.select2')
.on('keyup', '.select2', function(e) {
var keys = { up: 38, down: 40 };
var sel = $('.select2-results');
var childSelector = '.select2-results__option[role="treeitem"]';
var startElement = sel.find(childSelector + '.arrow_pointer');
var startPosition = 0;
var newPosition;
var newElement;
if (e.keyCode !== keys.up && e.keyCode !== keys.down) {
select2CheckGroups();
return;
}
sel.blur();
sel.find(childSelector).each((i, child) => {
if (child.className.includes('arrow_pointer')) startPosition = i;
});
if (startElement.length === 0) {
if ($('.select2-results')[0].dataset.lastSelected !== 'false') {
startPosition = parseInt($('.select2-results')[0].dataset.lastSelected, 10);
} else {
startElement = sel.find(childSelector).first().addClass('arrow_pointer');
$('.select2-results')[0].dataset.lastSelected = startPosition;
return;
}
}
if (e.keyCode === keys.down && !e.altKey) {
if ((startPosition + 1) === sel.find(childSelector).length) return;
newPosition = startPosition + 1;
} else if (e.keyCode === keys.up) {
if ((startPosition - 1) === -1) return;
newPosition = startPosition - 1;
}
newElement = sel.find(childSelector)[newPosition];
newElement.className += ' arrow_pointer';
$('.select2-results')[0].dataset.lastSelected = newPosition;
startElement.removeClass('arrow_pointer');
select2ScrollToSelectedElement();
select2CheckGroups();
});
$('.select2').find('input, .select2-selection__rendered').off('keydown').on('keydown', function(e) {
var activeElement = $('.select2-results .arrow_pointer');
var firstElement = $('.select2-results .select2-results__option').first();
var groupElement = activeElement.find('.select2-results__group');
if (e.keyCode === 13) {
if (groupElement.length > 0) {
groupElement.click();
} else if (activeElement.length > 0) {
activeElement.mouseup();
} else {
firstElement.mouseup();
}
setTimeout(() => {
select2CheckGroups();
}, 0);
e.preventDefault();
e.stopPropagation();
}
if ([37, 38, 39, 40].indexOf(e.keyCode) > -1) {
select2ScrollToSelectedElement();
e.preventDefault();
}
});
// Add dynamic size
select2.next().css('width', '100%');
// unlimited size
if (config.unlimitedSize) {
this[0].dataset.unlimitedSize = true;
select2.next().find('.select2-selection').css('max-height', 'none');
select2.next().find('.select2-selection .select2-selection__rendered').css('width', '100%');
}
// Create arrow
if (!(config.withoutArrow)) {
$('<div class="select2-arrow"><span class="caret"></span></div>').appendTo(select2.next())
.click(() => select2.next().find('.select2-selection').click());
}
// select all check
this[0].dataset.singleDisplay = config.singleDisplay || false;
if (this[0].dataset.selectAll === 'true') {
$.each($(this).find('option'), (index, e) => { e.selected = true; });
this.trigger('change');
}
if (config.singleDisplay) {
$(this).updateSingleName();
}
return select2
// Adding select all button
.on('select2:open', function() {
var selectElement = this;
var groups;
var groupChildrens;
var leftPosition = -310;
var perfectScroll = new PerfectScrollbar($('.select2-results__options')[0], {
wheelSpeed: 0.5,
handlers: ['click-rail', 'drag-thumb', 'wheel', 'touch']
});
setTimeout(() => {
perfectScroll.update();
}, 300);
$('.select2-results')[0].dataset.lastSelected = false;
selectElement.dataset.openDropdown = 'true';
$('.select2-dropdown').removeClass('custom-group').addClass(selectElement.id + '-dropdown');
$('.select2-selection').scrollTo(0);
$('.select2_select_all').remove();
// Adding select_all_button
if (selectElement.dataset.selectAllButton !== undefined) {
$('<div class="select2_select_all btn btn-default"><strong>' + selectElement.dataset.selectAllButton + '</strong></div>').prependTo('.select2-dropdown').on('click', function() {
var scrollTo = $('.select2-results__options').scrollTop();
var elementsToSelect = $.map($(selectElement).find('option'), e => e.value);
if (
$(selectElement).find('option:selected').length === elementsToSelect.length
|| config.ajax
) elementsToSelect = [];
$(selectElement).val(elementsToSelect).trigger('change');
$(selectElement).select2('close');
$(selectElement).select2('open');
$('.select2-results__options').scrollTo(scrollTo);
});
}
if (selectElement.dataset.dropdownPosition === 'left') {
$('.select2-dropdown').parent().addClass('left-position');
if (selectElement.dataset.selectAllButton === undefined) {
$('.select2-dropdown').parent().addClass('full');
}
if (window.innerWidth < 1200) {
$('.select2-dropdown').css('left', '');
} else {
$('.select2-dropdown').css('left', leftPosition);
}
$(window).on('resize', () => {
if (window.innerWidth < 1200) {
$('.select2-dropdown').css('left', '');
} else {
$('.select2-dropdown').css('left', leftPosition);
}
});
}
// Adding select all group members event
if (selectElement.dataset.selectByGroup === 'true') {
$('.select2-dropdown').addClass('custom-group');
setTimeout(() => {
groups = $('.select2-dropdown').find('.select2-results__group');
groups.off('click').click(e => {
var newSelection = [];
var scrollTo = $('.select2-results__options').scrollTop();
var group = e.currentTarget;
var childrens = $(selectElement).find('optgroup[label="' + group.innerHTML + '"] option');
childrens = $.map(childrens, act => act.value);
newSelection = ($(selectElement).val() || []).filter(function(i) {
return childrens.indexOf(i) < 0;
});
if ($(selectElement).find(
'optgroup[label="' + group.innerHTML + '"] option:selected'
).length !== childrens.length) {
newSelection = newSelection.concat(childrens);
}
$(selectElement).val(newSelection).trigger('change');
$(selectElement).select2('close');
$(selectElement).select2('open');
$('.select2-results__options').scrollTo(scrollTo);
});
$.each(groups, (index, e) => {
groupChildrens = $(selectElement).find('optgroup[label="' + e.innerHTML + '"] option');
$(e).parent()[0].dataset.customGroup = 'true';
$(e).parent()[0].dataset.toogle = 'none';
if ($(selectElement).find('optgroup[label="' + e.innerHTML + '"] option:selected').length === groupChildrens.length) {
$(e).parent()[0].dataset.toogle = 'all';
}
});
}, 0);
}
})
.on('select2:close', function() {
this.dataset.openDropdown = 'false';
})
// Prevent shake bug with multiple select
.on('select2:open select2:close', function() {
$('.select2-selection').scrollTo(0);
})
// Prevent opening window when deleteing selection
.on('select2:unselect', function() {
var resultWindow = $('.select2-container--open');
if (resultWindow.length === 0) {
$(this).select2('open');
}
})
// Fxied scroll bug
.on('select2:selecting select2:unselecting', function(e) {
$(e.currentTarget).data('scrolltop', $('.select2-results__options').scrollTop());
$('.select2-selection').scrollTo(0);
})
// Fxied scroll bug
.on('change', function(e) {
var groups;
var groupChildrens;
$('.select2-selection').scrollTo(0);
// Fix scroll to selected element after click
setTimeout(() => {
$('.select2-results__options').scrollTop($(e.currentTarget).data('scrolltop'));
}, 0);
if (this.dataset.singleDisplay === 'true') {
$(this).updateSingleName();
}
if (this.dataset.selectByGroup === 'true') {
groups = $('.select2-dropdown').find('.select2-results__group');
$.each(groups, (index, act) => {
groupChildrens = $(this).find('optgroup[label="' + act.innerHTML + '"] option');
$(act).parent()[0].dataset.toogle = 'none';
if ($(this).find('optgroup[label="' + act.innerHTML + '"] option:selected').length === groupChildrens.length) {
$(act).parent()[0].dataset.toogle = 'all';
}
});
}
setTimeout(() => {
select2ScrollToSelectedElement();
}, 0);
});
},
select2MultipleClearAll: function() {
$(this).val([]).trigger('change');
},
// Create from multiple blocks single one with counter
updateSingleName: function() {
var template = '';
var selectElement = this;
var selectedOptions = selectElement.next().find('.select2-selection__choice');
var optionsCounter = selectedOptions.length;
var allOptionsSelected = this.find('option').length === optionsCounter;
var optionText = allOptionsSelected ? this[0].dataset.selectMultipleAllSelected : optionsCounter + ' ' + this[0].dataset.selectMultipleName;
if (optionsCounter > 1) {
selectedOptions.remove();
template = '<li class="select2-selection__choice">'
+ '<span class="select2-selection__choice__remove" role="presentation">×</span>'
+ optionText
+ '</li>';
$(template).prependTo(selectElement.next().find('.select2-selection__rendered')).find('.select2-selection__choice__remove')
.click(function() { selectElement.select2MultipleClearAll(); });
}
}
});