BookStack Code Mirror - bookstack/blob - resources/js/markdown/codemirror.js

   1 import {provideKeyBindings} from './shortcuts';
   2 import {debounce} from '../services/util';
   3 import Clipboard from '../services/clipboard';
   4
   5 /**
   6  * Initiate the codemirror instance for the markdown editor.
   7  * @param {MarkdownEditor} editor
   8  * @returns {Promise<void>}
   9  */
  10 export async function init(editor) {
  11     const Code = await window.importVersioned('code');
  12
  13     /**
  14      * @param {ViewUpdate} v
  15      */
  16     function onViewUpdate(v) {
  17         if (v.docChanged) {
  18             editor.actions.updateAndRender();
  19         }
  20     }
  21
  22     const onScrollDebounced = debounce(editor.actions.syncDisplayPosition.bind(editor.actions), 100, false);
  23     let syncActive = editor.settings.get('scrollSync');
  24     editor.settings.onChange('scrollSync', val => syncActive = val);
  25
  26     const domEventHandlers = {
  27         // Handle scroll to sync display view
  28         scroll: event => syncActive && onScrollDebounced(event),
  29         // Handle image & content drag n drop
  30         drop: event => {
  31             const templateId = event.dataTransfer.getData('bookstack/template');
  32             if (templateId) {
  33                 event.preventDefault();
  34                 editor.actions.insertTemplate(templateId, event.pageX, event.pageY);
  35             }
  36
  37             const clipboard = new Clipboard(event.dataTransfer);
  38             const clipboardImages = clipboard.getImages();
  39             if (clipboardImages.length > 0) {
  40                 event.stopPropagation();
  41                 event.preventDefault();
  42                 editor.actions.insertClipboardImages(clipboardImages, event.pageX, event.pageY);
  43             }
  44         },
  45         // Handle image paste
  46         paste: event => {
  47             const clipboard = new Clipboard(event.clipboardData || event.dataTransfer);
  48
  49             // Don't handle the event ourselves if no items exist of contains table-looking data
  50             if (!clipboard.hasItems() || clipboard.containsTabularData()) {
  51                 return;
  52             }
  53
  54             const images = clipboard.getImages();
  55             for (const image of images) {
  56                 editor.actions.uploadImage(image);
  57             }
  58         },
  59     };
  60
  61     const cm = Code.markdownEditor(
  62         editor.config.inputEl,
  63         onViewUpdate,
  64         domEventHandlers,
  65         provideKeyBindings(editor),
  66     );
  67
  68     // Add editor view to window for easy access/debugging.
  69     // Not part of official API/Docs
  70     window.mdEditorView = cm;
  71
  72     return cm;
  73 }