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

chrome/browser/resources/access_chromevox/audio/common/abstract_tts_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 This is the base class responsible managing TTS engines.
+ */
+
+goog.provide('cvox.AbstractTtsManager');
+
+goog.require('cvox.AbstractTts');
+
+/**
+ * This is the base class responsible for spoken feedback.
+ *
+ * @constructor
+ * @extends {cvox.AbstractTts}
+ */
+cvox.AbstractTtsManager = function() {
+  //Inherit AbstractTts
+  cvox.AbstractTts.call(this);
+};
+goog.inherits(cvox.AbstractTtsManager, cvox.AbstractTts);
+
+/**
+ * Switch to the next TTS engine and optionally announce its name.
+ *
+ * @param {boolean} announce If true, will announce the name of the
+ *     new TTS engine.
+ */
+cvox.AbstractTtsManager.prototype.nextTtsEngine = function(announce) {
+  if (this.logEnabled()) {
+    this.log('[' + this.getName() + '] nextTtsEngine(' + announce + ')');
+  }
+};
+
+/**
+ * Increases a TTS speech property.
+ * @param {string} property_name The name of the property to increase.
+ */
+cvox.AbstractTtsManager.prototype.increaseProperty = function(
+    property_name) {
+  if (this.logEnabled()) {
+    this.log('[' + this.getName() + '] increaseProperty(' +
+        property_name + ')');
+  }
+};
+
+/**
+ * Decreases a TTS speech property.
+ * @param {string} property_name The name of the property to decrease.
+ */
+cvox.AbstractTtsManager.prototype.decreaseProperty = function(
+    property_name) {
+  if (this.logEnabled()) {
+    this.log('[' + this.getName() + '] decreaseProperty(' +
+        property_name + ')');
+  }
+};
+
+/**
+ * TTS rate property.
+ * @type {string}
+ */
+cvox.AbstractTtsManager.TTS_PROPERTY_RATE = 'Rate';
+
+/**
+ * TTS pitch property.
+ * @type {string}
+ */
+cvox.AbstractTtsManager.TTS_PROPERTY_PITCH = 'Pitch';
+
+/**
+ * TTS volume property.
+ * @type {string}
+ */
+cvox.AbstractTtsManager.TTS_PROPERTY_VOLUME = 'Volume';