// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Module to assist with creation and management of content.
*
* @module editor_tiny/content
* @copyright Andrew Lyons <andrew@nicols.co.uk>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// MathML valid elements retrieved from https://developer.mozilla.org/en-US/docs/Web/MathML/Element.
const mathmlContent = [
'math',
'maction',
'annotation',
'annotation-xml',
'menclose',
'merror',
'mfenced',
'mfrac',
'mi',
'mmultiscripts',
'mn',
'mo',
'mover',
'mpadded',
'mphantom',
'mprescripts',
'mroot',
'mrow',
'ms',
'semantics',
'mspace',
'msqrt',
'mstyle',
'msub',
'msup',
'msubsup',
'mtable',
'mtd',
'mtext',
'mtr',
'munder',
'munderover',
'math',
'mi',
'mn',
'mo',
'ms',
'mspace',
'mtext',
'menclose',
'merror',
'mfenced',
'mfrac',
'mpadded',
'mphantom',
'mroot',
'mrow',
'msqrt',
'mstyle',
'mmultiscripts',
'mover',
'mprescripts',
'msub',
'msubsup',
'msup',
'munder',
'munderover',
'mtable',
'mtd',
'mtr',
'maction',
'annotation',
'annotation-xml',
'semantics',
];
/**
* Add MathML support to the editor.
*
* @param { } editor
*/
export const addMathMLSupport = (editor) => {
const getNodeType = (node) => {
const style = node.attr('style');
if (style?.includes('display')) {
if (style.match(/display:[^;]*inline/)) {
return 'tiny-math-span';
}
}
return 'tiny-math-block';
};
editor.on('PreInit', () => {
editor.schema.addCustomElements(mathmlContent.join(','));
editor.schema.addCustomElements('~tiny-math-span,tiny-math-block');
// Add a Parser filter to wrap math nodes in a tiny-math-[block|span] element.
editor.parser.addNodeFilter('math', (nodes) => nodes.forEach((node) => {
if (node.parent) {
if (node.parent.name === 'tiny-math-block' || node.parent.name === 'tiny-math-span') {
// Already wrapped.
return;
}
}
const displayMode = getNodeType(node);
node.wrap(editor.editorManager.html.Node.create(displayMode, {
contenteditable: 'false',
}));
}));
// Add a Serializer filter to remove the tiny-math-[block|span] wrapper.
editor.serializer.addNodeFilter('tiny-math-span, tiny-math-block', (nodes, name) => nodes.forEach((node) => {
const displayMode = name.replace('tiny-math-', '');
node.children().forEach((child) => {
const currentStyle = child.attr('style');
if (currentStyle) {
child.attr('style', `${currentStyle};display: ${displayMode}`);
} else {
child.attr('style', `display: ${displayMode}`);
}
});
node.unwrap();
}));
});
};
/**
* Add SVG support to the editor.
*
* @param {TinyMCE} editor
*/
export const addSVGSupport = (editor) => {
editor.on('PreInit', () => {
editor.schema.addCustomElements('svg,tiny-svg-block');
editor.parser.addNodeFilter('svg', (nodes) => nodes.forEach((node) => {
node.wrap(editor.editorManager.html.Node.create('tiny-svg-block', {
contenteditable: 'false',
}));
}));
editor.serializer.addNodeFilter('tiny-svg-block', (nodes) => nodes.forEach((node) => {
node.unwrap();
}));
});
};