e00d88f45d
Uses vdom system to diff and update the current markdown preview view instead of requiring a full HTML replace change. This should provide better performance, expecially where dynamically loaded content such as iframes were in use. Closes #3454
608 lines
23 KiB
JavaScript
608 lines
23 KiB
JavaScript
import MarkdownIt from "markdown-it";
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import mdTasksLists from 'markdown-it-task-lists';
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import Clipboard from "../services/clipboard";
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import {debounce} from "../services/util";
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import {patchDomFromHtmlString} from "../services/vdom";
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import DrawIO from "../services/drawio";
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class MarkdownEditor {
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setup() {
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this.elem = this.$el;
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this.pageId = this.$opts.pageId;
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this.textDirection = this.$opts.textDirection;
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this.imageUploadErrorText = this.$opts.imageUploadErrorText;
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this.serverUploadLimitText = this.$opts.serverUploadLimitText;
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this.markdown = new MarkdownIt({html: true});
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this.markdown.use(mdTasksLists, {label: true});
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this.display = this.elem.querySelector('.markdown-display');
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this.displayStylesLoaded = false;
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this.input = this.elem.querySelector('textarea');
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this.cm = null;
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this.Code = null;
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const cmLoadPromise = window.importVersioned('code').then(Code => {
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this.cm = Code.markdownEditor(this.input);
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this.Code = Code;
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return this.cm;
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});
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this.onMarkdownScroll = this.onMarkdownScroll.bind(this);
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const displayLoad = () => {
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this.displayDoc = this.display.contentDocument;
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this.init(cmLoadPromise);
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};
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if (this.display.contentDocument.readyState === 'complete') {
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displayLoad();
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} else {
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this.display.addEventListener('load', displayLoad.bind(this));
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}
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window.$events.emitPublic(this.elem, 'editor-markdown::setup', {
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markdownIt: this.markdown,
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displayEl: this.display,
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codeMirrorInstance: this.cm,
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});
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}
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init(cmLoadPromise) {
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let lastClick = 0;
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// Prevent markdown display link click redirect
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this.displayDoc.addEventListener('click', event => {
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let isDblClick = Date.now() - lastClick < 300;
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let link = event.target.closest('a');
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if (link !== null) {
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event.preventDefault();
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window.open(link.getAttribute('href'));
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return;
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}
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let drawing = event.target.closest('[drawio-diagram]');
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if (drawing !== null && isDblClick) {
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this.actionEditDrawing(drawing);
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return;
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}
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lastClick = Date.now();
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});
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// Button actions
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this.elem.addEventListener('click', event => {
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let button = event.target.closest('button[data-action]');
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if (button === null) return;
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let action = button.getAttribute('data-action');
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if (action === 'insertImage') this.actionInsertImage();
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if (action === 'insertLink') this.actionShowLinkSelector();
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if (action === 'insertDrawing' && (event.ctrlKey || event.metaKey)) {
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this.actionShowImageManager();
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return;
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}
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if (action === 'insertDrawing') this.actionStartDrawing();
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if (action === 'fullscreen') this.actionFullScreen();
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});
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// Mobile section toggling
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this.elem.addEventListener('click', event => {
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const toolbarLabel = event.target.closest('.editor-toolbar-label');
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if (!toolbarLabel) return;
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const currentActiveSections = this.elem.querySelectorAll('.markdown-editor-wrap');
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for (let activeElem of currentActiveSections) {
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activeElem.classList.remove('active');
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}
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toolbarLabel.closest('.markdown-editor-wrap').classList.add('active');
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});
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cmLoadPromise.then(cm => {
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this.codeMirrorSetup(cm);
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// Refresh CodeMirror on container resize
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const resizeDebounced = debounce(() => this.Code.updateLayout(cm), 100, false);
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const observer = new ResizeObserver(resizeDebounced);
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observer.observe(this.elem);
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});
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this.listenForBookStackEditorEvents();
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// Scroll to text if needed.
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const queryParams = (new URL(window.location)).searchParams;
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const scrollText = queryParams.get('content-text');
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if (scrollText) {
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this.scrollToText(scrollText);
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}
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}
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// Update the input content and render the display.
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updateAndRender() {
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const content = this.cm.getValue();
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this.input.value = content;
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const html = this.markdown.render(content);
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window.$events.emit('editor-html-change', html);
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window.$events.emit('editor-markdown-change', content);
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// Set body content
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const target = this.getDisplayTarget();
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this.displayDoc.body.className = 'page-content';
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patchDomFromHtmlString(target, html);
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// Copy styles from page head and set custom styles for editor
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this.loadStylesIntoDisplay();
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}
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getDisplayTarget() {
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const body = this.displayDoc.body;
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if (body.children.length === 0) {
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const wrap = document.createElement('div');
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this.displayDoc.body.append(wrap);
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}
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return body.children[0];
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}
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loadStylesIntoDisplay() {
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if (this.displayStylesLoaded) return;
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this.displayDoc.documentElement.classList.add('markdown-editor-display');
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// Set display to be dark mode if parent is
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if (document.documentElement.classList.contains('dark-mode')) {
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this.displayDoc.documentElement.style.backgroundColor = '#222';
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this.displayDoc.documentElement.classList.add('dark-mode');
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}
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this.displayDoc.head.innerHTML = '';
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const styles = document.head.querySelectorAll('style,link[rel=stylesheet]');
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for (let style of styles) {
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const copy = style.cloneNode(true);
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this.displayDoc.head.appendChild(copy);
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}
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this.displayStylesLoaded = true;
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}
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onMarkdownScroll(lineCount) {
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const elems = this.displayDoc.body.children;
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if (elems.length <= lineCount) return;
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const topElem = (lineCount === -1) ? elems[elems.length-1] : elems[lineCount];
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topElem.scrollIntoView({ block: 'start', inline: 'nearest', behavior: 'smooth'});
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}
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codeMirrorSetup(cm) {
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const context = this;
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// Text direction
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// cm.setOption('direction', this.textDirection);
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cm.setOption('direction', 'ltr'); // Will force to remain as ltr for now due to issues when HTML is in editor.
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// Custom key commands
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let metaKey = this.Code.getMetaKey();
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const extraKeys = {};
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// Insert Image shortcut
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extraKeys[`${metaKey}-Alt-I`] = function(cm) {
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let selectedText = cm.getSelection();
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let newText = ``;
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let cursorPos = cm.getCursor('from');
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cm.replaceSelection(newText);
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cm.setCursor(cursorPos.line, cursorPos.ch + newText.length -1);
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};
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// Save draft
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extraKeys[`${metaKey}-S`] = cm => {window.$events.emit('editor-save-draft')};
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// Save page
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extraKeys[`${metaKey}-Enter`] = cm => {window.$events.emit('editor-save-page')};
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// Show link selector
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extraKeys[`Shift-${metaKey}-K`] = cm => {this.actionShowLinkSelector()};
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// Insert Link
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extraKeys[`${metaKey}-K`] = cm => {insertLink()};
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// FormatShortcuts
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extraKeys[`${metaKey}-1`] = cm => {replaceLineStart('##');};
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extraKeys[`${metaKey}-2`] = cm => {replaceLineStart('###');};
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extraKeys[`${metaKey}-3`] = cm => {replaceLineStart('####');};
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extraKeys[`${metaKey}-4`] = cm => {replaceLineStart('#####');};
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extraKeys[`${metaKey}-5`] = cm => {replaceLineStart('');};
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extraKeys[`${metaKey}-d`] = cm => {replaceLineStart('');};
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extraKeys[`${metaKey}-6`] = cm => {replaceLineStart('>');};
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extraKeys[`${metaKey}-q`] = cm => {replaceLineStart('>');};
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extraKeys[`${metaKey}-7`] = cm => {wrapSelection('\n```\n', '\n```');};
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extraKeys[`${metaKey}-8`] = cm => {wrapSelection('`', '`');};
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extraKeys[`Shift-${metaKey}-E`] = cm => {wrapSelection('`', '`');};
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extraKeys[`${metaKey}-9`] = cm => {wrapSelection('<p class="callout info">', '</p>');};
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cm.setOption('extraKeys', extraKeys);
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// Update data on content change
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cm.on('change', (instance, changeObj) => {
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this.updateAndRender();
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});
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const onScrollDebounced = debounce((instance) => {
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// Thanks to http://liuhao.im/english/2015/11/10/the-sync-scroll-of-markdown-editor-in-javascript.html
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let scroll = instance.getScrollInfo();
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let atEnd = scroll.top + scroll.clientHeight === scroll.height;
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if (atEnd) {
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this.onMarkdownScroll(-1);
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return;
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}
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let lineNum = instance.lineAtHeight(scroll.top, 'local');
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let range = instance.getRange({line: 0, ch: null}, {line: lineNum, ch: null});
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let parser = new DOMParser();
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let doc = parser.parseFromString(this.markdown.render(range), 'text/html');
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let totalLines = doc.documentElement.querySelectorAll('body > *');
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this.onMarkdownScroll(totalLines.length);
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}, 100);
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// Handle scroll to sync display view
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cm.on('scroll', instance => {
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onScrollDebounced(instance);
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});
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// Handle image paste
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cm.on('paste', (cm, event) => {
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const clipboard = new Clipboard(event.clipboardData || event.dataTransfer);
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// Don't handle the event ourselves if no items exist of contains table-looking data
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if (!clipboard.hasItems() || clipboard.containsTabularData()) {
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return;
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}
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const images = clipboard.getImages();
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for (const image of images) {
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uploadImage(image);
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}
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});
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// Handle image & content drag n drop
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cm.on('drop', (cm, event) => {
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const templateId = event.dataTransfer.getData('bookstack/template');
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if (templateId) {
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const cursorPos = cm.coordsChar({left: event.pageX, top: event.pageY});
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cm.setCursor(cursorPos);
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event.preventDefault();
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window.$http.get(`/templates/${templateId}`).then(resp => {
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const content = resp.data.markdown || resp.data.html;
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cm.replaceSelection(content);
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});
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}
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const clipboard = new Clipboard(event.dataTransfer);
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if (clipboard.hasItems() && clipboard.getImages().length > 0) {
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const cursorPos = cm.coordsChar({left: event.pageX, top: event.pageY});
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cm.setCursor(cursorPos);
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event.stopPropagation();
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event.preventDefault();
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const images = clipboard.getImages();
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for (const image of images) {
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uploadImage(image);
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}
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}
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});
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// Helper to replace editor content
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function replaceContent(search, replace) {
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let text = cm.getValue();
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let cursor = cm.listSelections();
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cm.setValue(text.replace(search, replace));
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cm.setSelections(cursor);
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}
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// Helper to replace the start of the line
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function replaceLineStart(newStart) {
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let cursor = cm.getCursor();
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let lineContent = cm.getLine(cursor.line);
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let lineLen = lineContent.length;
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let lineStart = lineContent.split(' ')[0];
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// Remove symbol if already set
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if (lineStart === newStart) {
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lineContent = lineContent.replace(`${newStart} `, '');
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cm.replaceRange(lineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen});
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cm.setCursor({line: cursor.line, ch: cursor.ch - (newStart.length + 1)});
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return;
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}
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let alreadySymbol = /^[#>`]/.test(lineStart);
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let posDif = 0;
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if (alreadySymbol) {
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posDif = newStart.length - lineStart.length;
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lineContent = lineContent.replace(lineStart, newStart).trim();
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} else if (newStart !== '') {
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posDif = newStart.length + 1;
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lineContent = newStart + ' ' + lineContent;
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}
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cm.replaceRange(lineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen});
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cm.setCursor({line: cursor.line, ch: cursor.ch + posDif});
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}
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function wrapLine(start, end) {
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let cursor = cm.getCursor();
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let lineContent = cm.getLine(cursor.line);
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let lineLen = lineContent.length;
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let newLineContent = lineContent;
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if (lineContent.indexOf(start) === 0 && lineContent.slice(-end.length) === end) {
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newLineContent = lineContent.slice(start.length, lineContent.length - end.length);
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} else {
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newLineContent = `${start}${lineContent}${end}`;
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}
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cm.replaceRange(newLineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen});
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cm.setCursor({line: cursor.line, ch: cursor.ch + start.length});
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}
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function wrapSelection(start, end) {
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let selection = cm.getSelection();
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if (selection === '') return wrapLine(start, end);
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let newSelection = selection;
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let frontDiff = 0;
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let endDiff = 0;
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if (selection.indexOf(start) === 0 && selection.slice(-end.length) === end) {
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newSelection = selection.slice(start.length, selection.length - end.length);
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endDiff = -(end.length + start.length);
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} else {
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newSelection = `${start}${selection}${end}`;
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endDiff = start.length + end.length;
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}
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let selections = cm.listSelections()[0];
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cm.replaceSelection(newSelection);
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let headFirst = selections.head.ch <= selections.anchor.ch;
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selections.head.ch += headFirst ? frontDiff : endDiff;
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selections.anchor.ch += headFirst ? endDiff : frontDiff;
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cm.setSelections([selections]);
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}
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// Handle image upload and add image into markdown content
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function uploadImage(file) {
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if (file === null || file.type.indexOf('image') !== 0) return;
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let ext = 'png';
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if (file.name) {
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let fileNameMatches = file.name.match(/\.(.+)$/);
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if (fileNameMatches.length > 1) ext = fileNameMatches[1];
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}
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// Insert image into markdown
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const id = "image-" + Math.random().toString(16).slice(2);
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const placeholderImage = window.baseUrl(`/loading.gif#upload${id}`);
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const selectedText = cm.getSelection();
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const placeHolderText = ``;
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const cursor = cm.getCursor();
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cm.replaceSelection(placeHolderText);
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cm.setCursor({line: cursor.line, ch: cursor.ch + selectedText.length + 3});
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const remoteFilename = "image-" + Date.now() + "." + ext;
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const formData = new FormData();
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formData.append('file', file, remoteFilename);
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formData.append('uploaded_to', context.pageId);
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window.$http.post('/images/gallery', formData).then(resp => {
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const newContent = `[](${resp.data.url})`;
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replaceContent(placeHolderText, newContent);
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}).catch(err => {
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window.$events.emit('error', context.imageUploadErrorText);
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replaceContent(placeHolderText, selectedText);
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console.log(err);
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});
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}
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function insertLink() {
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let cursorPos = cm.getCursor('from');
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let selectedText = cm.getSelection() || '';
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let newText = `[${selectedText}]()`;
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cm.focus();
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cm.replaceSelection(newText);
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let cursorPosDiff = (selectedText === '') ? -3 : -1;
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cm.setCursor(cursorPos.line, cursorPos.ch + newText.length+cursorPosDiff);
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}
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this.updateAndRender();
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}
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actionInsertImage() {
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const cursorPos = this.cm.getCursor('from');
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window.ImageManager.show(image => {
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const imageUrl = image.thumbs.display || image.url;
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let selectedText = this.cm.getSelection();
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let newText = "[![" + (selectedText || image.name) + "](" + imageUrl + ")](" + image.url + ")";
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this.cm.focus();
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this.cm.replaceSelection(newText);
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this.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length);
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}, 'gallery');
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}
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actionShowImageManager() {
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const cursorPos = this.cm.getCursor('from');
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window.ImageManager.show(image => {
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this.insertDrawing(image, cursorPos);
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}, 'drawio');
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}
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// Show the popup link selector and insert a link when finished
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actionShowLinkSelector() {
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const cursorPos = this.cm.getCursor('from');
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window.EntitySelectorPopup.show(entity => {
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let selectedText = this.cm.getSelection() || entity.name;
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let newText = `[${selectedText}](${entity.link})`;
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this.cm.focus();
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this.cm.replaceSelection(newText);
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this.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length);
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});
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}
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getDrawioUrl() {
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const drawioUrlElem = document.querySelector('[drawio-url]');
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return drawioUrlElem ? drawioUrlElem.getAttribute('drawio-url') : false;
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}
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// Show draw.io if enabled and handle save.
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actionStartDrawing() {
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const url = this.getDrawioUrl();
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if (!url) return;
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const cursorPos = this.cm.getCursor('from');
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DrawIO.show(url,() => {
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return Promise.resolve('');
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}, (pngData) => {
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const data = {
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image: pngData,
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uploaded_to: Number(this.pageId),
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};
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window.$http.post("/images/drawio", data).then(resp => {
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this.insertDrawing(resp.data, cursorPos);
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DrawIO.close();
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}).catch(err => {
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this.handleDrawingUploadError(err);
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});
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});
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}
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insertDrawing(image, originalCursor) {
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const newText = `<div drawio-diagram="${image.id}"><img src="${image.url}"></div>`;
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this.cm.focus();
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this.cm.replaceSelection(newText);
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this.cm.setCursor(originalCursor.line, originalCursor.ch + newText.length);
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}
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// Show draw.io if enabled and handle save.
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actionEditDrawing(imgContainer) {
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const drawioUrl = this.getDrawioUrl();
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if (!drawioUrl) {
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return;
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}
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const cursorPos = this.cm.getCursor('from');
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const drawingId = imgContainer.getAttribute('drawio-diagram');
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DrawIO.show(drawioUrl, () => {
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return DrawIO.load(drawingId);
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}, (pngData) => {
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|
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let data = {
|
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image: pngData,
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uploaded_to: Number(this.pageId),
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|
};
|
|
|
|
window.$http.post("/images/drawio", data).then(resp => {
|
|
let newText = `<div drawio-diagram="${resp.data.id}"><img src="${resp.data.url}"></div>`;
|
|
let newContent = this.cm.getValue().split('\n').map(line => {
|
|
if (line.indexOf(`drawio-diagram="${drawingId}"`) !== -1) {
|
|
return newText;
|
|
}
|
|
return line;
|
|
}).join('\n');
|
|
this.cm.setValue(newContent);
|
|
this.cm.setCursor(cursorPos);
|
|
this.cm.focus();
|
|
DrawIO.close();
|
|
}).catch(err => {
|
|
this.handleDrawingUploadError(err);
|
|
});
|
|
});
|
|
}
|
|
|
|
handleDrawingUploadError(error) {
|
|
if (error.status === 413) {
|
|
window.$events.emit('error', this.serverUploadLimitText);
|
|
} else {
|
|
window.$events.emit('error', this.imageUploadErrorText);
|
|
}
|
|
console.log(error);
|
|
}
|
|
|
|
// Make the editor full screen
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|
actionFullScreen() {
|
|
const alreadyFullscreen = this.elem.classList.contains('fullscreen');
|
|
this.elem.classList.toggle('fullscreen', !alreadyFullscreen);
|
|
document.body.classList.toggle('markdown-fullscreen', !alreadyFullscreen);
|
|
}
|
|
|
|
// Scroll to a specified text
|
|
scrollToText(searchText) {
|
|
if (!searchText) {
|
|
return;
|
|
}
|
|
|
|
const content = this.cm.getValue();
|
|
const lines = content.split(/\r?\n/);
|
|
let lineNumber = lines.findIndex(line => {
|
|
return line && line.indexOf(searchText) !== -1;
|
|
});
|
|
|
|
if (lineNumber === -1) {
|
|
return;
|
|
}
|
|
|
|
this.cm.scrollIntoView({
|
|
line: lineNumber,
|
|
}, 200);
|
|
this.cm.focus();
|
|
// set the cursor location.
|
|
this.cm.setCursor({
|
|
line: lineNumber,
|
|
char: lines[lineNumber].length
|
|
})
|
|
}
|
|
|
|
listenForBookStackEditorEvents() {
|
|
|
|
function getContentToInsert({html, markdown}) {
|
|
return markdown || html;
|
|
}
|
|
|
|
// Replace editor content
|
|
window.$events.listen('editor::replace', (eventContent) => {
|
|
const markdown = getContentToInsert(eventContent);
|
|
this.cm.setValue(markdown);
|
|
});
|
|
|
|
// Append editor content
|
|
window.$events.listen('editor::append', (eventContent) => {
|
|
const cursorPos = this.cm.getCursor('from');
|
|
const markdown = getContentToInsert(eventContent);
|
|
const content = this.cm.getValue() + '\n' + markdown;
|
|
this.cm.setValue(content);
|
|
this.cm.setCursor(cursorPos.line, cursorPos.ch);
|
|
});
|
|
|
|
// Prepend editor content
|
|
window.$events.listen('editor::prepend', (eventContent) => {
|
|
const cursorPos = this.cm.getCursor('from');
|
|
const markdown = getContentToInsert(eventContent);
|
|
const content = markdown + '\n' + this.cm.getValue();
|
|
this.cm.setValue(content);
|
|
const prependLineCount = markdown.split('\n').length;
|
|
this.cm.setCursor(cursorPos.line + prependLineCount, cursorPos.ch);
|
|
});
|
|
|
|
// Insert editor content at the current location
|
|
window.$events.listen('editor::insert', (eventContent) => {
|
|
const markdown = getContentToInsert(eventContent);
|
|
this.cm.replaceSelection(markdown);
|
|
});
|
|
|
|
// Focus on editor
|
|
window.$events.listen('editor::focus', () => {
|
|
this.cm.focus();
|
|
});
|
|
}
|
|
}
|
|
|
|
export default MarkdownEditor ;
|