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

chrome/browser/resources/access_chromevox/audio/background/local_tts_server_engine.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 Text-To-Speech engine that is running as a local server.
+ */
+
+goog.provide('cvox.ChromeVoxLocalTtsServerEngine');
+
+goog.require('cvox.AbstractTts');
+
+/**
+ * @constructor
+ * @extends {cvox.AbstractTts}
+ */
+cvox.ChromeVoxLocalTtsServerEngine = function() {
+  //Inherit AbstractTts
+  cvox.AbstractTts.call(this);
+};
+goog.inherits(cvox.ChromeVoxLocalTtsServerEngine, cvox.AbstractTts);
+
+/**
+ * @return {string} The human-readable name of the speech engine.
+ */
+cvox.ChromeVoxLocalTtsServerEngine.prototype.getName = function() {
+  return 'Local Speech';
+};
+
+/**
+ * Speaks the given string using the specified queueMode and properties.
+ * @param {string} textString The string of text to be spoken.
+ * @param {number=} queueMode The queue mode: AbstractTts.QUEUE_MODE_FLUSH
+ *        for flush, AbstractTts.QUEUE_MODE_QUEUE for adding to queue.
+ * @param {Object=} properties Speech properties to use for this utterance.
+ */
+cvox.ChromeVoxLocalTtsServerEngine.prototype.speak = function(
+    textString, queueMode, properties) {
+  cvox.ChromeVoxLocalTtsServerEngine.superClass_.speak.call(this,
+      textString, queueMode, properties);
+  //This is VERY hacky, but it works as a demo
+  var theScript = document.createElement('script');
+  theScript.type = 'text/javascript';
+  theScript.src = 'http://localhost/' + textString;
+  document.getElementsByTagName('head')[0].appendChild(theScript);
+};
+
+/**
+ * @return {boolean} True if the TTS is speaking.
+ */
+cvox.ChromeVoxLocalTtsServerEngine.prototype.isSpeaking = function() {
+  cvox.ChromeVoxLocalTtsServerEngine.superClass_.isSpeaking.call(this);
+  return false;
+};
+
+/**
+ * Stops speech.
+ */
+cvox.ChromeVoxLocalTtsServerEngine.prototype.stop = function() {
+  cvox.ChromeVoxLocalTtsServerEngine.superClass_.stop.call(this);
+  this.speak('');
+};