BookStack/resources/js/wysiwyg/plugin-codeeditor.js

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function elemIsCodeBlock(elem) {
return elem.tagName.toLowerCase() === 'code-block';
}
/**
* @param {Editor} editor
* @param {String} code
* @param {String} language
* @param {function(string, string)} callback (Receives (code: string,language: string)
*/
function showPopup(editor, code, language, callback) {
window.components.first('code-editor').open(code, language, (newCode, newLang) => {
callback(newCode, newLang)
editor.focus()
});
}
/**
* @param {Editor} editor
* @param {CodeBlockElement} codeBlock
*/
function showPopupForCodeBlock(editor, codeBlock) {
showPopup(editor, codeBlock.getContent(), codeBlock.getLanguage(), (newCode, newLang) => {
codeBlock.setContent(newCode, newLang);
});
}
/**
* Define our custom code-block HTML element that we use.
* Needs to be delayed since it needs to be defined within the context of the
* child editor window and document, hence its definition within a callback.
* @param {Editor} editor
*/
function defineCodeBlockCustomElement(editor) {
const doc = editor.getDoc();
const win = doc.defaultView;
class CodeBlockElement extends win.HTMLElement {
constructor() {
super();
this.attachShadow({mode: 'open'});
const stylesToCopy = document.querySelectorAll('link[rel="stylesheet"]:not([media="print"])');
const copiedStyles = Array.from(stylesToCopy).map(styleEl => styleEl.cloneNode(false));
const cmContainer = document.createElement('div');
cmContainer.style.pointerEvents = 'none';
cmContainer.contentEditable = 'false';
cmContainer.classList.add('CodeMirrorContainer');
this.shadowRoot.append(...copiedStyles, cmContainer);
}
getLanguage() {
const getLanguageFromClassList = (classes) => {
const langClasses = classes.split(' ').filter(cssClass => cssClass.startsWith('language-'));
return (langClasses[0] || '').replace('language-', '');
};
const code = this.querySelector('code');
const pre = this.querySelector('pre');
return getLanguageFromClassList(pre.className) || (code && getLanguageFromClassList(code.className)) || '';
}
setContent(content, language) {
if (this.cm) {
importVersioned('code').then(Code => {
Code.setContent(this.cm, content);
Code.setMode(this.cm, language, content);
});
}
let pre = this.querySelector('pre');
if (!pre) {
pre = doc.createElement('pre');
this.append(pre);
}
pre.innerHTML = '';
const code = doc.createElement('code');
pre.append(code);
code.innerText = content;
code.className = `language-${language}`;
}
getContent() {
const code = this.querySelector('code') || this.querySelector('pre');
const tempEl = document.createElement('pre');
tempEl.innerHTML = code.innerHTML.replace(/\ufeff/g, '');
const brs = tempEl.querySelectorAll('br');
for (const br of brs) {
br.replaceWith('\n');
}
return tempEl.textContent;
}
connectedCallback() {
const connectedTime = Date.now();
if (this.cm) {
return;
}
this.cleanChildContent();
const content = this.getContent();
const lines = content.split('\n').length;
const height = (lines * 19.2) + 18 + 24;
this.style.height = `${height}px`;
const container = this.shadowRoot.querySelector('.CodeMirrorContainer');
const renderCodeMirror = (Code) => {
this.cm = Code.wysiwygView(container, content, this.getLanguage());
setTimeout(() => Code.updateLayout(this.cm), 10);
setTimeout(() => this.style.height = null, 12);
};
window.importVersioned('code').then((Code) => {
const timeout = (Date.now() - connectedTime < 20) ? 20 : 0;
setTimeout(() => renderCodeMirror(Code), timeout);
});
}
cleanChildContent() {
const pre = this.querySelector('pre');
if (!pre) return;
for (const preChild of pre.childNodes) {
if (preChild.nodeName === '#text' && preChild.textContent === '') {
preChild.remove();
}
}
}
}
win.customElements.define('code-block', CodeBlockElement);
}
/**
* @param {Editor} editor
* @param {String} url
*/
function register(editor, url) {
editor.ui.registry.addIcon('codeblock', '<svg width="24" height="24"><path d="M4 3h16c.6 0 1 .4 1 1v16c0 .6-.4 1-1 1H4a1 1 0 0 1-1-1V4c0-.6.4-1 1-1Zm1 2v14h14V5Z"/><path d="M11.103 15.423c.277.277.277.738 0 .922a.692.692 0 0 1-1.106 0l-4.057-3.78a.738.738 0 0 1 0-1.107l4.057-3.872c.276-.277.83-.277 1.106 0a.724.724 0 0 1 0 1.014L7.6 12.012ZM12.897 8.577c-.245-.312-.2-.675.08-.955.28-.281.727-.27 1.027.033l4.057 3.78a.738.738 0 0 1 0 1.107l-4.057 3.872c-.277.277-.83.277-1.107 0a.724.724 0 0 1 0-1.014l3.504-3.412z"/></svg>')
editor.ui.registry.addButton('codeeditor', {
tooltip: 'Insert code block',
icon: 'codeblock',
onAction() {
editor.execCommand('codeeditor');
}
});
editor.ui.registry.addButton('editcodeeditor', {
tooltip: 'Edit code block',
icon: 'edit-block',
onAction() {
editor.execCommand('codeeditor');
}
});
editor.addCommand('codeeditor', () => {
const selectedNode = editor.selection.getNode();
const doc = selectedNode.ownerDocument;
if (elemIsCodeBlock(selectedNode)) {
showPopupForCodeBlock(editor, selectedNode);
} else {
const textContent = editor.selection.getContent({format: 'text'});
showPopup(editor, textContent, '', (newCode, newLang) => {
const pre = doc.createElement('pre');
const code = doc.createElement('code');
code.classList.add(`language-${newLang}`);
code.innerText = newCode;
pre.append(code);
editor.insertContent(pre.outerHTML);
});
}
});
editor.on('dblclick', event => {
let selectedNode = editor.selection.getNode();
if (elemIsCodeBlock(selectedNode)) {
showPopupForCodeBlock(editor, selectedNode);
}
});
editor.on('PreInit', () => {
editor.parser.addNodeFilter('pre', function(elms) {
for (const el of elms) {
const wrapper = tinymce.html.Node.create('code-block', {
contenteditable: 'false',
});
const spans = el.getAll('span');
for (const span of spans) {
span.unwrap();
}
el.attr('style', null);
el.wrap(wrapper);
}
});
editor.parser.addNodeFilter('code-block', function(elms) {
for (const el of elms) {
el.attr('contenteditable', 'false');
}
});
editor.serializer.addNodeFilter('code-block', function(elms) {
for (const el of elms) {
el.unwrap();
}
});
});
editor.ui.registry.addContextToolbar('codeeditor', {
predicate: function (node) {
return node.nodeName.toLowerCase() === 'code-block';
},
items: 'editcodeeditor',
position: 'node',
scope: 'node'
});
editor.on('PreInit', () => {
defineCodeBlockCustomElement(editor);
});
}
/**
* @param {WysiwygConfigOptions} options
* @return {register}
*/
export function getPlugin(options) {
return register;
}