BookStack/resources/js/markdown/actions.js

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JavaScript
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import DrawIO from "../services/drawio";
export class Actions {
/**
* @param {MarkdownEditor} editor
*/
constructor(editor) {
this.editor = editor;
this.lastContent = {
html: '',
markdown: '',
};
}
updateAndRender() {
const content = this.editor.cm.state.doc.toString();
this.editor.config.inputEl.value = content;
const html = this.editor.markdown.render(content);
window.$events.emit('editor-html-change', '');
window.$events.emit('editor-markdown-change', '');
this.lastContent.html = html;
this.lastContent.markdown = content;
this.editor.display.patchWithHtml(html);
}
getContent() {
return this.lastContent;
}
insertImage() {
const cursorPos = this.editor.cm.getCursor('from');
/** @type {ImageManager} **/
const imageManager = window.$components.first('image-manager');
imageManager.show(image => {
const imageUrl = image.thumbs.display || image.url;
let selectedText = this.editor.cm.getSelection();
let newText = "[![" + (selectedText || image.name) + "](" + imageUrl + ")](" + image.url + ")";
this.editor.cm.focus();
this.editor.cm.replaceSelection(newText);
this.editor.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length);
}, 'gallery');
}
insertLink() {
const cursorPos = this.editor.cm.getCursor('from');
const selectedText = this.editor.cm.getSelection() || '';
const newText = `[${selectedText}]()`;
this.editor.cm.focus();
this.editor.cm.replaceSelection(newText);
const cursorPosDiff = (selectedText === '') ? -3 : -1;
this.editor.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length+cursorPosDiff);
}
showImageManager() {
const cursorPos = this.editor.cm.getCursor('from');
/** @type {ImageManager} **/
const imageManager = window.$components.first('image-manager');
imageManager.show(image => {
this.insertDrawing(image, cursorPos);
}, 'drawio');
}
// Show the popup link selector and insert a link when finished
showLinkSelector() {
const cursorPos = this.editor.cm.getCursor('from');
/** @type {EntitySelectorPopup} **/
const selector = window.$components.first('entity-selector-popup');
selector.show(entity => {
let selectedText = this.editor.cm.getSelection() || entity.name;
let newText = `[${selectedText}](${entity.link})`;
this.editor.cm.focus();
this.editor.cm.replaceSelection(newText);
this.editor.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length);
});
}
// Show draw.io if enabled and handle save.
startDrawing() {
const url = this.editor.config.drawioUrl;
if (!url) return;
const cursorPos = this.editor.cm.getCursor('from');
DrawIO.show(url,() => {
return Promise.resolve('');
}, (pngData) => {
const data = {
image: pngData,
uploaded_to: Number(this.editor.config.pageId),
};
window.$http.post("/images/drawio", data).then(resp => {
this.insertDrawing(resp.data, cursorPos);
DrawIO.close();
}).catch(err => {
this.handleDrawingUploadError(err);
});
});
}
insertDrawing(image, originalCursor) {
const newText = `<div drawio-diagram="${image.id}"><img src="${image.url}"></div>`;
this.editor.cm.focus();
this.editor.cm.replaceSelection(newText);
this.editor.cm.setCursor(originalCursor.line, originalCursor.ch + newText.length);
}
// Show draw.io if enabled and handle save.
editDrawing(imgContainer) {
const drawioUrl = this.editor.config.drawioUrl;
if (!drawioUrl) {
return;
}
const cursorPos = this.editor.cm.getCursor('from');
const drawingId = imgContainer.getAttribute('drawio-diagram');
DrawIO.show(drawioUrl, () => {
return DrawIO.load(drawingId);
}, (pngData) => {
const data = {
image: pngData,
uploaded_to: Number(this.editor.config.pageId),
};
window.$http.post("/images/drawio", data).then(resp => {
const newText = `<div drawio-diagram="${resp.data.id}"><img src="${resp.data.url}"></div>`;
const newContent = this.editor.cm.getValue().split('\n').map(line => {
if (line.indexOf(`drawio-diagram="${drawingId}"`) !== -1) {
return newText;
}
return line;
}).join('\n');
this.editor.cm.setValue(newContent);
this.editor.cm.setCursor(cursorPos);
this.editor.cm.focus();
DrawIO.close();
}).catch(err => {
this.handleDrawingUploadError(err);
});
});
}
handleDrawingUploadError(error) {
if (error.status === 413) {
window.$events.emit('error', this.editor.config.text.serverUploadLimit);
} else {
window.$events.emit('error', this.editor.config.text.imageUploadError);
}
console.log(error);
}
// Make the editor full screen
fullScreen() {
const container = this.editor.config.container;
const alreadyFullscreen = container.classList.contains('fullscreen');
container.classList.toggle('fullscreen', !alreadyFullscreen);
document.body.classList.toggle('markdown-fullscreen', !alreadyFullscreen);
}
// Scroll to a specified text
scrollToText(searchText) {
if (!searchText) {
return;
}
const content = this.editor.cm.getValue();
const lines = content.split(/\r?\n/);
let lineNumber = lines.findIndex(line => {
return line && line.indexOf(searchText) !== -1;
});
if (lineNumber === -1) {
return;
}
this.editor.cm.scrollIntoView({
line: lineNumber,
}, 200);
this.editor.cm.focus();
// set the cursor location.
this.editor.cm.setCursor({
line: lineNumber,
char: lines[lineNumber].length
})
}
focus() {
this.editor.cm.focus();
}
/**
* Insert content into the editor.
* @param {String} content
*/
insertContent(content) {
this.editor.cm.replaceSelection(content);
}
/**
* Prepend content to the editor.
* @param {String} content
*/
prependContent(content) {
const cursorPos = this.editor.cm.getCursor('from');
const newContent = content + '\n' + this.editor.cm.getValue();
this.editor.cm.setValue(newContent);
const prependLineCount = content.split('\n').length;
this.editor.cm.setCursor(cursorPos.line + prependLineCount, cursorPos.ch);
}
/**
* Append content to the editor.
* @param {String} content
*/
appendContent(content) {
const cursorPos = this.editor.cm.getCursor('from');
const newContent = this.editor.cm.getValue() + '\n' + content;
this.editor.cm.setValue(newContent);
this.editor.cm.setCursor(cursorPos.line, cursorPos.ch);
}
/**
* Replace the editor's contents
* @param {String} content
*/
replaceContent(content) {
this.editor.cm.setValue(content);
}
/**
* @param {String|RegExp} search
* @param {String} replace
*/
findAndReplaceContent(search, replace) {
const text = this.editor.cm.getValue();
const cursor = this.editor.cm.listSelections();
this.editor.cm.setValue(text.replace(search, replace));
this.editor.cm.setSelections(cursor);
}
/**
* Replace the start of the line
* @param {String} newStart
*/
replaceLineStart(newStart) {
const cursor = this.editor.cm.getCursor();
let lineContent = this.editor.cm.getLine(cursor.line);
const lineLen = lineContent.length;
const lineStart = lineContent.split(' ')[0];
// Remove symbol if already set
if (lineStart === newStart) {
lineContent = lineContent.replace(`${newStart} `, '');
this.editor.cm.replaceRange(lineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen});
this.editor.cm.setCursor({line: cursor.line, ch: cursor.ch - (newStart.length + 1)});
return;
}
const 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;
}
this.editor.cm.replaceRange(lineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen});
this.editor.cm.setCursor({line: cursor.line, ch: cursor.ch + posDif});
}
/**
* Wrap the line in the given start and end contents.
* @param {String} start
* @param {String} end
*/
wrapLine(start, end) {
const cursor = this.editor.cm.getCursor();
const lineContent = this.editor.cm.getLine(cursor.line);
const 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}${end}`;
}
this.editor.cm.replaceRange(newLineContent, {line: cursor.line, ch: 0}, {line: cursor.line, ch: lineLen});
this.editor.cm.setCursor({line: cursor.line, ch: cursor.ch + start.length});
}
/**
* Wrap the selection in the given contents start and end contents.
* @param {String} start
* @param {String} end
*/
wrapSelection(start, end) {
const selection = this.editor.cm.getSelection();
if (selection === '') return this.wrapLine(start, end);
let newSelection = selection;
const frontDiff = 0;
let endDiff;
if (selection.indexOf(start) === 0 && selection.slice(-end.length) === end) {
newSelection = selection.slice(start.length, selection.length - end.length);
endDiff = -(end.length + start.length);
} else {
newSelection = `${start}${selection}${end}`;
endDiff = start.length + end.length;
}
const selections = this.editor.cm.listSelections()[0];
this.editor.cm.replaceSelection(newSelection);
const headFirst = selections.head.ch <= selections.anchor.ch;
selections.head.ch += headFirst ? frontDiff : endDiff;
selections.anchor.ch += headFirst ? endDiff : frontDiff;
this.editor.cm.setSelections([selections]);
}
replaceLineStartForOrderedList() {
const cursor = this.editor.cm.getCursor();
const prevLineContent = this.editor.cm.getLine(cursor.line - 1) || '';
const listMatch = prevLineContent.match(/^(\s*)(\d)([).])\s/) || [];
const number = (Number(listMatch[2]) || 0) + 1;
const whiteSpace = listMatch[1] || '';
const listMark = listMatch[3] || '.'
const prefix = `${whiteSpace}${number}${listMark}`;
return this.replaceLineStart(prefix);
}
/**
* Cycles through the type of callout block within the selection.
* Creates a callout block if none existing, and removes it if cycling past the danger type.
*/
cycleCalloutTypeAtSelection() {
const selectionRange = this.editor.cm.listSelections()[0];
const lineContent = this.editor.cm.getLine(selectionRange.anchor.line);
const lineLength = lineContent.length;
const contentRange = {
anchor: {line: selectionRange.anchor.line, ch: 0},
head: {line: selectionRange.anchor.line, ch: lineLength},
};
const formats = ['info', 'success', 'warning', 'danger'];
const joint = formats.join('|');
const regex = new RegExp(`class="((${joint})\\s+callout|callout\\s+(${joint}))"`, 'i');
const matches = regex.exec(lineContent);
const format = (matches ? (matches[2] || matches[3]) : '').toLowerCase();
if (format === formats[formats.length - 1]) {
this.wrapLine(`<p class="callout ${formats[formats.length - 1]}">`, '</p>');
} else if (format === '') {
this.wrapLine('<p class="callout info">', '</p>');
} else {
const newFormatIndex = formats.indexOf(format) + 1;
const newFormat = formats[newFormatIndex];
const newContent = lineContent.replace(matches[0], matches[0].replace(format, newFormat));
this.editor.cm.replaceRange(newContent, contentRange.anchor, contentRange.head);
const chDiff = newContent.length - lineContent.length;
selectionRange.anchor.ch += chDiff;
if (selectionRange.anchor !== selectionRange.head) {
selectionRange.head.ch += chDiff;
}
this.editor.cm.setSelection(selectionRange.anchor, selectionRange.head);
}
}
/**
* Handle image upload and add image into markdown content
* @param {File} file
*/
uploadImage(file) {
if (file === null || file.type.indexOf('image') !== 0) return;
let ext = 'png';
if (file.name) {
let fileNameMatches = file.name.match(/\.(.+)$/);
if (fileNameMatches.length > 1) ext = fileNameMatches[1];
}
// Insert image into markdown
const id = "image-" + Math.random().toString(16).slice(2);
const placeholderImage = window.baseUrl(`/loading.gif#upload${id}`);
const selectedText = this.editor.cm.getSelection();
const placeHolderText = `![${selectedText}](${placeholderImage})`;
const cursor = this.editor.cm.getCursor();
this.editor.cm.replaceSelection(placeHolderText);
this.editor.cm.setCursor({line: cursor.line, ch: cursor.ch + selectedText.length + 3});
const remoteFilename = "image-" + Date.now() + "." + ext;
const formData = new FormData();
formData.append('file', file, remoteFilename);
formData.append('uploaded_to', this.editor.config.pageId);
window.$http.post('/images/gallery', formData).then(resp => {
const newContent = `[![${selectedText}](${resp.data.thumbs.display})](${resp.data.url})`;
this.findAndReplaceContent(placeHolderText, newContent);
}).catch(err => {
window.$events.emit('error', this.editor.config.text.imageUploadError);
this.findAndReplaceContent(placeHolderText, selectedText);
console.log(err);
});
}
syncDisplayPosition(event) {
// Thanks to http://liuhao.im/english/2015/11/10/the-sync-scroll-of-markdown-editor-in-javascript.html
const scrollEl = event.target;
const atEnd = Math.abs(scrollEl.scrollHeight - scrollEl.clientHeight - scrollEl.scrollTop) < 1;
if (atEnd) {
this.editor.display.scrollToIndex(-1);
return;
}
const blockInfo = this.editor.cm.lineBlockAtHeight(scrollEl.scrollTop);
const range = this.editor.cm.state.sliceDoc(0, blockInfo.from);
const parser = new DOMParser();
const doc = parser.parseFromString(this.editor.markdown.render(range), 'text/html');
const totalLines = doc.documentElement.querySelectorAll('body > *');
this.editor.display.scrollToIndex(totalLines.length);
}
/**
* Fetch and insert the template of the given ID.
* The page-relative position provided can be used to determine insert location if possible.
* @param {String} templateId
* @param {Number} posX
* @param {Number} posY
*/
insertTemplate(templateId, posX, posY) {
const cursorPos = this.editor.cm.coordsChar({left: posX, top: posY});
this.editor.cm.setCursor(cursorPos);
window.$http.get(`/templates/${templateId}`).then(resp => {
const content = resp.data.markdown || resp.data.html;
this.editor.cm.replaceSelection(content);
});
}
/**
* Insert multiple images from the clipboard.
* @param {File[]} images
*/
insertClipboardImages(images) {
const cursorPos = this.editor.cm.coordsChar({left: event.pageX, top: event.pageY});
this.editor.cm.setCursor(cursorPos);
for (const image of images) {
this.uploadImage(image);
}
}
}