const MarkdownIt = require("markdown-it"); const mdTasksLists = require('markdown-it-task-lists'); const code = require('../libs/code'); const DrawIO = require('../libs/drawio'); class MarkdownEditor { constructor(elem) { this.elem = elem; this.markdown = new MarkdownIt({html: true}); this.markdown.use(mdTasksLists, {label: true}); this.display = this.elem.querySelector('.markdown-display'); this.input = this.elem.querySelector('textarea'); this.htmlInput = this.elem.querySelector('input[name=html]'); this.cm = code.markdownEditor(this.input); this.onMarkdownScroll = this.onMarkdownScroll.bind(this); this.init(); } init() { let lastClick = 0; // Prevent markdown display link click redirect this.display.addEventListener('click', event => { let isDblClick = Date.now() - lastClick < 300; let link = event.target.closest('a'); if (link !== null) { event.preventDefault(); window.open(link.getAttribute('href')); return; } let drawing = event.target.closest('[drawio-diagram]'); if (drawing !== null && isDblClick) { this.actionEditDrawing(drawing); return; } lastClick = Date.now(); }); // Button actions this.elem.addEventListener('click', event => { let button = event.target.closest('button[data-action]'); if (button === null) return; let action = button.getAttribute('data-action'); if (action === 'insertImage') this.actionInsertImage(); if (action === 'insertLink') this.actionShowLinkSelector(); if (action === 'insertDrawing') this.actionStartDrawing(); }); window.$events.listen('editor-markdown-update', value => { this.cm.setValue(value); this.updateAndRender(); }); this.codeMirrorSetup(); } // Update the input content and render the display. updateAndRender() { let content = this.cm.getValue(); this.input.value = content; let html = this.markdown.render(content); window.$events.emit('editor-html-change', html); window.$events.emit('editor-markdown-change', content); this.display.innerHTML = html; this.htmlInput.value = html; } onMarkdownScroll(lineCount) { let elems = this.display.children; if (elems.length <= lineCount) return; let topElem = (lineCount === -1) ? elems[elems.length-1] : elems[lineCount]; // TODO - Replace jQuery $(this.display).animate({ scrollTop: topElem.offsetTop }, {queue: false, duration: 200, easing: 'linear'}); } codeMirrorSetup() { let cm = this.cm; // Custom key commands let metaKey = code.getMetaKey(); const extraKeys = {}; // Insert Image shortcut extraKeys[`${metaKey}-Alt-I`] = function(cm) { let selectedText = cm.getSelection(); let newText = `![${selectedText}](http://)`; let cursorPos = cm.getCursor('from'); cm.replaceSelection(newText); cm.setCursor(cursorPos.line, cursorPos.ch + newText.length -1); }; // Save draft extraKeys[`${metaKey}-S`] = cm => {window.$events.emit('editor-save-draft')}; // Save page extraKeys[`${metaKey}-Enter`] = cm => {window.$events.emit('editor-save-page')}; // Show link selector extraKeys[`Shift-${metaKey}-K`] = cm => {this.actionShowLinkSelector()}; // Insert Link extraKeys[`${metaKey}-K`] = cm => {insertLink()}; // FormatShortcuts extraKeys[`${metaKey}-1`] = cm => {replaceLineStart('##');}; extraKeys[`${metaKey}-2`] = cm => {replaceLineStart('###');}; extraKeys[`${metaKey}-3`] = cm => {replaceLineStart('####');}; extraKeys[`${metaKey}-4`] = cm => {replaceLineStart('#####');}; extraKeys[`${metaKey}-5`] = cm => {replaceLineStart('');}; extraKeys[`${metaKey}-d`] = cm => {replaceLineStart('');}; extraKeys[`${metaKey}-6`] = cm => {replaceLineStart('>');}; extraKeys[`${metaKey}-q`] = cm => {replaceLineStart('>');}; extraKeys[`${metaKey}-7`] = cm => {wrapSelection('\n```\n', '\n```');}; extraKeys[`${metaKey}-8`] = cm => {wrapSelection('`', '`');}; extraKeys[`Shift-${metaKey}-E`] = cm => {wrapSelection('`', '`');}; extraKeys[`${metaKey}-9`] = cm => {wrapSelection('

', '

');}; cm.setOption('extraKeys', extraKeys); // Update data on content change cm.on('change', (instance, changeObj) => { this.updateAndRender(); }); // Handle scroll to sync display view cm.on('scroll', instance => { // Thanks to http://liuhao.im/english/2015/11/10/the-sync-scroll-of-markdown-editor-in-javascript.html let scroll = instance.getScrollInfo(); let atEnd = scroll.top + scroll.clientHeight === scroll.height; if (atEnd) { this.onMarkdownScroll(-1); return; } let lineNum = instance.lineAtHeight(scroll.top, 'local'); let range = instance.getRange({line: 0, ch: null}, {line: lineNum, ch: null}); let parser = new DOMParser(); let doc = parser.parseFromString(this.markdown.render(range), 'text/html'); let totalLines = doc.documentElement.querySelectorAll('body > *'); this.onMarkdownScroll(totalLines.length); }); // Handle image paste cm.on('paste', (cm, event) => { if (!event.clipboardData || !event.clipboardData.items) return; for (let i = 0; i < event.clipboardData.items.length; i++) { uploadImage(event.clipboardData.items[i].getAsFile()); } }); // Handle images on drag-drop cm.on('drop', (cm, event) => { event.stopPropagation(); event.preventDefault(); let cursorPos = cm.coordsChar({left: event.pageX, top: event.pageY}); cm.setCursor(cursorPos); if (!event.dataTransfer || !event.dataTransfer.files) return; for (let i = 0; i < event.dataTransfer.files.length; i++) { uploadImage(event.dataTransfer.files[i]); } }); // Helper to replace editor content function replaceContent(search, replace) { let text = cm.getValue(); let cursor = cm.listSelections(); cm.setValue(text.replace(search, replace)); cm.setSelections(cursor); } // Helper to replace the start of the line function replaceLineStart(newStart) { let cursor = cm.getCursor(); let lineContent = cm.getLine(cursor.line); let lineLen = lineContent.length; let lineStart = lineContent.split(' ')[0]; // Remove symbol if already set if (lineStart === newStart) { lineContent = lineContent.replace(`${newStart} `, ''); cm.replaceRange(lineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen}); cm.setCursor({line: cursor.line, ch: cursor.ch - (newStart.length + 1)}); return; } let alreadySymbol = /^[#>`]/.test(lineStart); let posDif = 0; if (alreadySymbol) { posDif = newStart.length - lineStart.length; lineContent = lineContent.replace(lineStart, newStart).trim(); } else if (newStart !== '') { posDif = newStart.length + 1; lineContent = newStart + ' ' + lineContent; } cm.replaceRange(lineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen}); cm.setCursor({line: cursor.line, ch: cursor.ch + posDif}); } function wrapLine(start, end) { let cursor = cm.getCursor(); let lineContent = cm.getLine(cursor.line); let lineLen = lineContent.length; let newLineContent = lineContent; if (lineContent.indexOf(start) === 0 && lineContent.slice(-end.length) === end) { newLineContent = lineContent.slice(start.length, lineContent.length - end.length); } else { newLineContent = `${start}${lineContent}${end}`; } cm.replaceRange(newLineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen}); cm.setCursor({line: cursor.line, ch: cursor.ch + start.length}); } function wrapSelection(start, end) { let selection = cm.getSelection(); if (selection === '') return wrapLine(start, end); let newSelection = selection; let frontDiff = 0; let endDiff = 0; if (selection.indexOf(start) === 0 && selection.slice(-end.length) === end) { newSelection = selection.slice(start.length, selection.length - end.length); endDiff = -(end.length + start.length); } else { newSelection = `${start}${selection}${end}`; endDiff = start.length + end.length; } let selections = cm.listSelections()[0]; cm.replaceSelection(newSelection); let headFirst = selections.head.ch <= selections.anchor.ch; selections.head.ch += headFirst ? frontDiff : endDiff; selections.anchor.ch += headFirst ? endDiff : frontDiff; cm.setSelections([selections]); } // Handle image upload and add image into markdown content function uploadImage(file) { if (file === null || file.type.indexOf('image') !== 0) return; let ext = 'png'; if (file.name) { let fileNameMatches = file.name.match(/\.(.+)$/); if (fileNameMatches.length > 1) ext = fileNameMatches[1]; } // Insert image into markdown let id = "image-" + Math.random().toString(16).slice(2); let placeholderImage = window.baseUrl(`/loading.gif#upload${id}`); let selectedText = cm.getSelection(); let placeHolderText = `![${selectedText}](${placeholderImage})`; cm.replaceSelection(placeHolderText); let remoteFilename = "image-" + Date.now() + "." + ext; let formData = new FormData(); formData.append('file', file, remoteFilename); window.$http.post('/images/gallery/upload', formData).then(resp => { replaceContent(placeholderImage, resp.data.thumbs.display); }).catch(err => { events.emit('error', trans('errors.image_upload_error')); replaceContent(placeHolderText, selectedText); console.log(err); }); } function insertLink() { let cursorPos = cm.getCursor('from'); let selectedText = cm.getSelection() || ''; let newText = `[${selectedText}]()`; cm.focus(); cm.replaceSelection(newText); let cursorPosDiff = (selectedText === '') ? -3 : -1; cm.setCursor(cursorPos.line, cursorPos.ch + newText.length+cursorPosDiff); } this.updateAndRender(); } actionInsertImage() { let cursorPos = this.cm.getCursor('from'); window.ImageManager.show(image => { let selectedText = this.cm.getSelection(); let newText = "![" + (selectedText || image.name) + "](" + image.thumbs.display + ")"; this.cm.focus(); this.cm.replaceSelection(newText); this.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length); }); } // Show the popup link selector and insert a link when finished actionShowLinkSelector() { let cursorPos = this.cm.getCursor('from'); window.EntitySelectorPopup.show(entity => { let selectedText = this.cm.getSelection() || entity.name; let newText = `[${selectedText}](${entity.link})`; this.cm.focus(); this.cm.replaceSelection(newText); this.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length); }); } // Show draw.io if enabled and handle save. actionStartDrawing() { if (document.querySelector('[drawio-enabled]').getAttribute('drawio-enabled') !== 'true') return; let cursorPos = this.cm.getCursor('from'); DrawIO.show(() => { return Promise.resolve(''); }, (pngData) => { // let id = "image-" + Math.random().toString(16).slice(2); // let loadingImage = window.baseUrl('/loading.gif'); let data = { image: pngData, uploaded_to: Number(document.getElementById('page-editor').getAttribute('page-id')) }; window.$http.post(window.baseUrl('/images/drawing/upload'), data).then(resp => { let newText = `
`; this.cm.focus(); this.cm.replaceSelection(newText); this.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length); DrawIO.close(); }).catch(err => { window.$events.emit('error', trans('errors.image_upload_error')); console.log(err); }); }); } // Show draw.io if enabled and handle save. actionEditDrawing(imgContainer) { if (document.querySelector('[drawio-enabled]').getAttribute('drawio-enabled') !== 'true') return; let cursorPos = this.cm.getCursor('from'); let drawingId = imgContainer.getAttribute('drawio-diagram'); DrawIO.show(() => { return window.$http.get(window.baseUrl(`/images/base64/${drawingId}`)).then(resp => { return `data:image/png;base64,${resp.data.content}`; }); }, (pngData) => { let data = { image: pngData, uploaded_to: Number(document.getElementById('page-editor').getAttribute('page-id')) }; window.$http.put(window.baseUrl(`/images/drawing/upload/${drawingId}`), data).then(resp => { let newText = `
`; let newContent = this.cm.getValue().split('\n').map(line => { if (line.indexOf(`drawio-diagram="${drawingId}"`) !== -1) { return newText; } return line; }).join('\n'); this.cm.setValue(newContent); this.cm.setCursor(cursorPos); this.cm.focus(); DrawIO.close(); }).catch(err => { window.$events.emit('error', trans('errors.image_upload_error')); console.log(err); }); }); } } module.exports = MarkdownEditor ;