BookStack/resources/js/markdown/codemirror.js

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import {provideKeyBindings} from './shortcuts';
import {debounce} from '../services/util';
import {Clipboard} from '../services/clipboard';
/**
* Initiate the codemirror instance for the markdown editor.
* @param {MarkdownEditor} editor
* @returns {Promise<void>}
*/
export async function init(editor) {
const Code = await window.importVersioned('code');
/**
* @param {ViewUpdate} v
*/
function onViewUpdate(v) {
if (v.docChanged) {
editor.actions.updateAndRender();
}
}
const onScrollDebounced = debounce(editor.actions.syncDisplayPosition.bind(editor.actions), 100, false);
let syncActive = editor.settings.get('scrollSync');
editor.settings.onChange('scrollSync', val => {
syncActive = val;
});
const domEventHandlers = {
// Handle scroll to sync display view
scroll: event => syncActive && onScrollDebounced(event),
// Handle image & content drag n drop
drop: event => {
const templateId = event.dataTransfer.getData('bookstack/template');
if (templateId) {
event.preventDefault();
editor.actions.insertTemplate(templateId, event.pageX, event.pageY);
}
const clipboard = new Clipboard(event.dataTransfer);
const clipboardImages = clipboard.getImages();
if (clipboardImages.length > 0) {
event.stopPropagation();
event.preventDefault();
editor.actions.insertClipboardImages(clipboardImages, event.pageX, event.pageY);
}
},
// Handle image paste
paste: event => {
const clipboard = new Clipboard(event.clipboardData || event.dataTransfer);
// Don't handle the event ourselves if no items exist of contains table-looking data
if (!clipboard.hasItems() || clipboard.containsTabularData()) {
return;
}
const images = clipboard.getImages();
for (const image of images) {
editor.actions.uploadImage(image);
}
},
};
const cm = Code.markdownEditor(
editor.config.inputEl,
onViewUpdate,
domEventHandlers,
provideKeyBindings(editor),
);
// Add editor view to window for easy access/debugging.
// Not part of official API/Docs
window.mdEditorView = cm;
return cm;
}