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/**
* wysiwyg.js - Replace HTML textareas with WYSIWYG editor.
*/
import parseOptions from './parse_options.js';
import WikiLink from '../cke/wiki-link/wiki-link.js';
const wysiwyg = {
// NOTE keep this function in sync with Markup class
htmlMarker: '<!--HTML-->',
htmlMarkerRegExp: /^\s*<!--\s*HTML.*?-->/i,
isHtml: function isHtml(text) {
// NOTE keep this function in sync with
// Markup::isHtml in Markup.class.php
return this.hasHtmlMarker(text);
},
hasHtmlMarker: function hasHtmlMarker(text) {
// NOTE keep this function in sync with
// Markup::hasHtmlMarker in Markup.class.php
return this.htmlMarkerRegExp.test(text);
},
markAsHtml: function markAsHtml(text) {
// NOTE keep this function in sync with
// Markup::markAsHtml in Markup.class.php
if (this.hasHtmlMarker(text) || text.trim() == '') {
return text; // marker already set, don't set twice
}
return this.htmlMarker + text;
},
getEditor,
hasEditor,
replace(textarea) {
if (!hasEditor(textarea)) {
if (isTextareaVisible(textarea)) {
return replaceTextarea(textarea);
}
} else if (isEditorHidden(textarea)) {
destroyTextarea(textarea);
}
},
};
export default wysiwyg;
function isTextareaVisible(textarea) {
return $(textarea).is(':visible');
}
function isEditorHidden(textarea) {
if (!hasEditor(textarea)) {
return false;
}
const editor = getEditor(textarea);
return editor && editor.ui && $(editor.ui.element).is(':hidden');
}
async function replaceTextarea(textarea) {
await loadMathJax();
setEditor(textarea, {});
const chunk = await STUDIP.loadChunk('wysiwyg');
const $textarea = textarea instanceof jQuery ? textarea : $(textarea);
const { options, editorType } = parseEditorOptions($textarea.attr('data-editor'));
const editor = await createEditor(chunk, textarea, editorType, options);
enhanceEditor($textarea, editor);
setEditor(textarea, editor);
$textarea.trigger('load.wysiwyg');
return editor;
}
function destroyTextarea(textarea) {
if (!hasEditor(textarea)) {
throw new Error('Trying to destroy a non-existing editor instance.');
}
const editor = getEditor(textarea);
editor.destroy(true);
unsetEditor(textarea);
}
// create an unused id
function createNewId(prefix) {
var i = 0;
while ($('#' + prefix + i).length > 0) {
i++;
}
return prefix + i;
}
const instances = new Map();
function getEditor(textarea) {
return textarea?.id !== '' ? instances.get(textarea.id) : null;
}
function hasEditor(textarea) {
return textarea.id !== '' && instances.has(textarea.id);
}
function setEditor(textarea, editor) {
if (textarea.id === '') {
textarea.id = createNewId('wysiwyg');
}
instances.set(textarea.id, editor);
}
function unsetEditor(textarea) {
instances.delete(textarea.id);
}
////////////////////////////////////////////////////////////////////////////////
function parseEditorOptions(data) {
const result = { options: {}, editorType: 'classic' };
if (data) {
const parsed = parseOptions(data);
const toolbar = getToolbarOptions(parsed);
if (toolbar) {
result.options.toolbar = toolbar;
}
if (parsed.removePlugins) {
result.options.removePlugins = parsed.removePlugins.split(',');
}
if (parsed.extraPlugins) {
const pluginMap = { WikiLink };
result.options.extraPlugins = parsed.extraPlugins.split(',').reduce((memo, plugin) => {
return plugin in pluginMap ? [...memo, pluginMap[plugin]] : memo;
}, []);
}
if (parsed.type) {
if (['balloon', 'classic'].includes(parsed.type)) {
result.editorType = parsed.type;
}
}
}
return result;
}
function getToolbarOptions(parsed) {
if (parsed.toolbar === 'small') {
return {
removeItems: [
'undo',
'redo',
'findAndReplace',
'strikethrough',
'horizontalLine',
'insertBlockQuote',
'splitBlockQuote',
'removeBlockQuote',
],
};
} else if (parsed.toolbar === 'minimal') {
return {
items: [
'bold',
'italic',
'underline',
'subscript',
'superscript',
'|',
'removeFormat',
'|',
'bulletedList',
'numberedList',
'|',
'fontColor',
'fontBackgroundColor',
'|',
'link',
'math',
'specialCharacters',
],
};
}
return null;
}
function loadMathJax() {
if (window.MathJax && window.MathJax.Hub) {
return Promise.resolve(window.MathJax);
} else if (window.STUDIP && window.STUDIP.loadChunk) {
return window.STUDIP.loadChunk('mathjax');
}
return Promise.reject(new Error('Could not load MathJax'));
}
function createEditor(chunk, textarea, editorType, options) {
switch (editorType) {
case 'classic':
return chunk.createClassicEditorFromTextarea(textarea, options);
case 'balloon':
return chunk.createBalloonEditorFromTextarea(textarea, options);
}
throw new Error('No such type of WYSIWYG editor.');
}
function enhanceEditor($textarea, ckeditor) {
// make sure HTML marker is always set, in
// case contents are cut-off by the backend
$textarea.closest('form').submit(() => {
ckeditor.setData(wysiwyg.markAsHtml(ckeditor.getData()));
ckeditor.updateSourceElement();
});
// focus the editor if requested
if ($textarea.is('[autofocus]')) {
ckeditor.focus();
}
ckeditor.ui.focusTracker.on('change:isFocused', (evt, name, isFocused) => {
if (!isFocused) {
ckeditor.sourceElement.value = wysiwyg.markAsHtml(ckeditor.getData());
}
});
// Tell MathJax v2.7 to leave the editor alone
ckeditor.ui.element.classList.add('tex2jax_ignore');
return ckeditor;
}
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