CM6: Updated for popup editor, added new interface

New simple interface added for abstraction of CM editor in simple
use-cases, just to provide common actions like get/set content, focus
and set mode.

resources/js/code/simple-editor-interface.js

@@ -0,0 +1,46 @@
+import {updateViewLanguage} from "./views";
+
+
+export class SimpleEditorInterface {
+    /**
+     * @param {EditorView} editorView
+     */
+    constructor(editorView) {
+        this.ev = editorView;
+    }
+
+    /**
+     * Get the contents of an editor instance.
+     * @return {string}
+     */
+    getContent() {
+        return this.ev.state.doc.toString();
+    }
+
+    /**
+     * Set the contents of an editor instance.
+     * @param content
+     */
+    setContent(content) {
+        const doc = this.ev.state.doc;
+        this.ev.dispatch({
+            changes: {from: 0, to: doc.length, insert: content}
+        });
+    }
+
+    /**
+     * Return focus to the editor instance.
+     */
+    focus() {
+        this.ev.focus();
+    }
+
+    /**
+     * Set the language mode of the editor instance.
+     * @param {String} mode
+     * @param {String} content
+     */
+    setMode(mode, content = '') {
+        updateViewLanguage(this.ev, mode, content);
+    }
+}