Adding ChromeVox as a component extensions (enabled only for ChromeOS, for no...

chrome/browser/resources/access_chromevox/audio/common/remote_earcons_manager.js

+// Copyright (c) 2011 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 Bridge that sends earcon messages from content scripts or
+ * other pages to the main background page.
+ */
+
+goog.provide('cvox.RemoteEarconsManager');
+
+goog.require('cvox.AbstractEarconsManager');
+goog.require('cvox.ExtensionBridge');
+
+if (BUILD_TYPE == BUILD_TYPE_CHROME) {
+  /**
+   * @constructor
+   * @extends {cvox.AbstractEarconsManager}
+   */
+  cvox.RemoteEarconsManager = function() {
+    cvox.AbstractEarconsManager.call(this);
+  };
+  goog.inherits(cvox.RemoteEarconsManager, cvox.AbstractEarconsManager);
+
+  /**
+   * @return {string} The human-readable name of this instance.
+   */
+  cvox.RemoteEarconsManager.prototype.getName = function() {
+    return 'RemoteEarconsManager';
+  };
+
+  /**
+   * Plays the specified earcon.
+   * @param {number} earcon The earcon to be played.
+   */
+  cvox.RemoteEarconsManager.prototype.playEarcon = function(earcon) {
+    cvox.RemoteEarconsManager.superClass_.playEarcon.call(this, earcon);
+    cvox.ExtensionBridge.send({
+        'target': 'EARCON',
+        'action': 'play',
+        'earcon': earcon});
+  };
+
+  /**
+   * Switch to the next earcon set and optionally announce its name.
+   * If no earcon sets have been specified this function is a NOOP.
+   * @param {boolean} announce If true, will announce the name of the
+   *     new earcon set.
+   */
+  cvox.RemoteEarconsManager.prototype.nextEarcons = function(announce) {
+    cvox.RemoteEarconsManager.superClass_.nextEarcons.call(this, announce);
+    cvox.ExtensionBridge.send({
+        'target': 'EARCON',
+        'action': 'nextEarcons'});
+  };
+
+} else {
+  cvox.RemoteEarconsManager = function() {};
+}