From bb2260fd91c92e2fd8026e6549373c7b30a9d19c Mon Sep 17 00:00:00 2001
From: Beka Westberg <bekawestberg@gmail.com>
Date: Thu, 24 Jan 2019 19:32:48 -0800
Subject: [PATCH] Added a Finished Loading event.

---
 core/events.js           |  5 +++
 core/workspace_events.js | 92 ++++++++++++++++++++++++++++++++++++++++
 core/xml.js              |  1 +
 3 files changed, 98 insertions(+)
 create mode 100644 core/workspace_events.js

diff --git a/core/events.js b/core/events.js
index 8fac89902..4dd4158ee 100644
--- a/core/events.js
+++ b/core/events.js
@@ -149,6 +149,11 @@ Blockly.Events.COMMENT_CHANGE = 'comment_change';
  */
 Blockly.Events.COMMENT_MOVE = 'comment_move';
 
+/**
+ * Name of event that records a workspace load.
+ */
+Blockly.Events.FINISHED_LOADING = 'finished_loading';
+
 /**
  * List of events queued for firing.
  * @private
diff --git a/core/workspace_events.js b/core/workspace_events.js
new file mode 100644
index 000000000..eb4a007aa
--- /dev/null
+++ b/core/workspace_events.js
@@ -0,0 +1,92 @@
+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * TODO: 2019 instead of 2018???
+ * Copyright 2018 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Class for a finished loading workspace event.
+ * @author BeksOmega
+ */
+'use strict';
+
+goog.provide(Blockly.Events.FinishedLoading);
+
+goog.require('Blockly.Events');
+goog.require('Blockly.Events.Abstract');
+
+/**
+ * Class for a finished loading event.
+ * Used to notify the developer when the workspace has finished loading (i.e
+ * domToWorkspace).
+ * Finished loading events do not record undo or redo.
+ * @param {!Blockly.Workspace} workspace The workspace that has finished
+ *    loading.
+ * @constructor
+ */
+Blockly.Events.FinishedLoading = function(workspace) {
+  /**
+   * The workspace identifier for this event.
+   * @type {string}
+   */
+  this.workspaceId = workspace.id;
+
+  /**
+   * 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}
+   */
+  this.group = Blockly.Events.group_;
+
+  // Workspace events do not undo or redo.
+  this.recordUndo = false;
+};
+goog.inherits(Blockly.Events.FinishedLoading, Blockly.Events.Abstract);
+
+/**
+ * Type of this event.
+ * @type {string}
+ */
+Blockly.Events.FinishedLoading.prototype.type = Blockly.Events.FINISHED_LOADING;
+
+/**
+ * Encode the event as JSON.
+ * @return {!Object} JSON representation.
+ */
+Blockly.Events.Ui.prototype.toJson = function() {
+  var json = {
+    'type': this.type,
+  };
+  if (this.group) {
+    json['group'] = this.group;
+  }
+  if (this.workspaceId) {
+    json['workspaceId'] = this.workspaceId;
+  }
+  return json;
+};
+
+/**
+ * Decode the JSON event.
+ * @param {!Object} json JSON representation.
+ */
+Blockly.Events.Ui.prototype.fromJson = function(json) {
+  this.workspaceId = json['workspaceId'];
+  this.group = json['group'];
+};
diff --git a/core/xml.js b/core/xml.js
index 6a8ba6e15..da4a6db3c 100644
--- a/core/xml.js
+++ b/core/xml.js
@@ -467,6 +467,7 @@ Blockly.Xml.domToWorkspace = function(xml, workspace) {
   if (workspace.setResizesEnabled) {
     workspace.setResizesEnabled(true);
   }
+  Blockly.Events.fire(new Blockly.Events.FinishedLoading(workspace));
   return newBlockIds;
 };