refactor: convert some classes to ES6 classes

core/events/workspace_events.js

@@ -16,7 +16,6 @@
 goog.module('Blockly.Events.FinishedLoading');
 
 const eventUtils = goog.require('Blockly.Events.utils');
-const object = goog.require('Blockly.utils.object');
 const registry = goog.require('Blockly.registry');
 const {Abstract} = goog.require('Blockly.Events.Abstract');
 /* eslint-disable-next-line no-unused-vars */
@@ -28,70 +27,65 @@ const {Workspace} = goog.requireType('Blockly.Workspace');
  * Used to notify the developer when the workspace has finished loading (i.e
  * domToWorkspace).
  * Finished loading events do not record undo or redo.
- * @param {!Workspace=} opt_workspace The workspace that has finished
- *    loading.  Undefined for a blank event.
  * @extends {Abstract}
- * @constructor
- * @alias Blockly.Events.FinishedLoading
  */
-const FinishedLoading = function(opt_workspace) {
+class FinishedLoading extends Abstract {
   /**
-   * Whether or not the event is blank (to be populated by fromJson).
-   * @type {boolean}
+   * @param {!Workspace=} opt_workspace The workspace that has finished
+   *    loading.  Undefined for a blank event.
+   * @alias Blockly.Events.FinishedLoading
    */
-  this.isBlank = typeof opt_workspace === 'undefined';
+  constructor(opt_workspace) {
+    super();
+    /**
+     * Whether or not the event is blank (to be populated by fromJson).
+     * @type {boolean}
+     */
+    this.isBlank = typeof opt_workspace === 'undefined';
+
+    /**
+     * The workspace identifier for this event.
+     * @type {string}
+     */
+    this.workspaceId = opt_workspace ? opt_workspace.id : '';
+
+    // Workspace events do not undo or redo.
+    this.recordUndo = false;
+
+    /**
+     * Type of this event.
+     * @type {string}
+     */
+    this.type = eventUtils.FINISHED_LOADING;
+  }
 
   /**
-   * The workspace identifier for this event.
-   * @type {string}
+   * Encode the event as JSON.
+   * @return {!Object} JSON representation.
    */
-  this.workspaceId = opt_workspace ? opt_workspace.id : '';
+  toJson() {
+    const json = {
+      'type': this.type,
+    };
+    if (this.group) {
+      json['group'] = this.group;
+    }
+    if (this.workspaceId) {
+      json['workspaceId'] = this.workspaceId;
+    }
+    return json;
+  }
 
   /**
-   * The event group ID for the group this event belongs to. Groups define
-   * events that should be treated as an single action from the user's
-   * perspective, and should be undone together.
-   * @type {string}
+   * Decode the JSON event.
+   * @param {!Object} json JSON representation.
    */
-  this.group = eventUtils.getGroup();
-
-  // Workspace events do not undo or redo.
-  this.recordUndo = false;
-};
-object.inherits(FinishedLoading, Abstract);
-
-/**
- * Type of this event.
- * @type {string}
- */
-FinishedLoading.prototype.type = eventUtils.FINISHED_LOADING;
-
-/**
- * Encode the event as JSON.
- * @return {!Object} JSON representation.
- */
-FinishedLoading.prototype.toJson = function() {
-  const json = {
-    'type': this.type,
-  };
-  if (this.group) {
-    json['group'] = this.group;
+  fromJson(json) {
+    this.isBlank = false;
+    this.workspaceId = json['workspaceId'];
+    this.group = json['group'];
   }
-  if (this.workspaceId) {
-    json['workspaceId'] = this.workspaceId;
-  }
-  return json;
-};
-
-/**
- * Decode the JSON event.
- * @param {!Object} json JSON representation.
- */
-FinishedLoading.prototype.fromJson = function(json) {
-  this.isBlank = false;
-  this.workspaceId = json['workspaceId'];
-  this.group = json['group'];
-};
+}
 
 registry.register(
     registry.Type.EVENT, eventUtils.FINISHED_LOADING, FinishedLoading);