Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_object_constructor_installer.js |
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_object_constructor_installer.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_object_constructor_installer.js |
new file mode 100644 |
index 0000000000000000000000000000000000000000..cdb5e93ec187fee0a9f273fb3740da6a3672e90a |
--- /dev/null |
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_object_constructor_installer.js |
@@ -0,0 +1,37 @@ |
+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+/** |
+ * @fileoverview Provides bindings to instantiate objects in the automation API. |
+ * |
+ * Due to restrictions in the extension system, it is not ordinarily possible to |
+ * construct an object defined by the extension API. However, given an instance |
+ * of that object, we can save its constructor for future use. |
+ */ |
+ |
+goog.provide('AutomationObjectConstructorInstaller'); |
+ |
+/** |
+ * Installs the AutomationNode and AutomationEvent classes based on an |
+ * AutomationNode instance. |
+ * @param {chrome.automation.AutomationNode} node |
+ * @param {function()} callback Called when installation finishes. |
+ */ |
+AutomationObjectConstructorInstaller.init = function(node, callback) { |
+ chrome.automation.AutomationNode = |
+ /** @type {function (new:chrome.automation.AutomationNode)} */( |
+ node.constructor); |
+ node.addEventListener(chrome.automation.EventType.childrenChanged, |
+ function installAutomationEvent(e) { |
+ chrome.automation.AutomationEvent = |
+ /** @type {function (new:chrome.automation.AutomationEvent)} */( |
+ e.constructor); |
+ node.removeEventListener( |
+ chrome.automation.EventType.childrenChanged, |
+ installAutomationEvent, |
+ true); |
+ callback(); |
+ }, |
+ true); |
+}; |