Canvas V2

assets/editor/core.js

@@ -6,6 +6,7 @@
 //   MarkdownEditor.create(mount, opts) → { view, actions, getValue, focus, destroy }
 //     opts.doc         initial text
 //     opts.keymap      extra CM key bindings, ahead of the defaults
+//     opts.onChange    called after every change to the text
 //   MarkdownEditor.bind(root, getActions)
 //     wires root's [data-action] buttons, [data-key] shortcuts and toolbar
 //     dropdowns to whatever getActions() returns (null = no editor open).
@@ -89,6 +90,9 @@ window.MarkdownEditor = (function () {
                 CM.closeBrackets(),
                 CM.autocompletion({ override: [WikiComplete.source] }),
                 CM.theme,
+                opts.onChange ? CM.EditorView.updateListener.of(function (u) {
+                    if (u.docChanged) opts.onChange();
+                }) : [],
                 CM.Prec.highest(CM.keymap.of(tableKeymap)),
                 CM.keymap.of([].concat(
                     CM.closeBracketsKeymap,