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

chrome/browser/resources/access_chromevox/audio/background/emacspeak_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 using the Emacspeak
+ * local speech server.
+ */
+
+goog.provide('cvox.ChromeVoxEmacspeakTtsServerEngine');
+
+goog.require('cvox.AbstractTts');
+
+/**
+ * @constructor
+ * @extends {cvox.AbstractTts}
+ */
+cvox.ChromeVoxEmacspeakTtsServerEngine = function() {
+  //Inherit AbstractTts
+  cvox.AbstractTts.call(this);
+};
+goog.inherits(cvox.ChromeVoxEmacspeakTtsServerEngine, cvox.AbstractTts);
+
+/**
+ * @return {string} The human-readable name of the speech engine.
+ */
+cvox.ChromeVoxEmacspeakTtsServerEngine.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.ChromeVoxEmacspeakTtsServerEngine.prototype.speak = function(
+    textString, queueMode, properties) {
+  cvox.ChromeVoxEmacspeakTtsServerEngine.superClass_.speak.call(this,
+      textString, queueMode, properties);
+   if (queueMode == cvox.AbstractTts.QUEUE_MODE_FLUSH) {
+     this.stop();
+   }
+   var emacspeakConnection = new XMLHttpRequest();
+   emacspeakConnection.overrideMimeType('text/xml');
+   emacspeakConnection.open('POST', 'http://127.0.0.1:8000', true);
+   emacspeakConnection.setRequestHeader('Content-Type',
+                                        'application/x-www-form-urlencoded');
+   emacspeakConnection.send('speak: ' + textString);
+};
+
+/**
+ * @return {boolean} True if the TTS is speaking.
+ */
+cvox.ChromeVoxEmacspeakTtsServerEngine.prototype.isSpeaking = function() {
+  cvox.ChromeVoxEmacspeakTtsServerEngine.superClass_.isSpeaking.call(this);
+  return false;
+};
+
+/**
+ * Stops speech.
+ */
+cvox.ChromeVoxEmacspeakTtsServerEngine.prototype.stop = function() {
+  cvox.ChromeVoxEmacspeakTtsServerEngine.superClass_.stop.call(this);
+   var emacspeakConnection = new XMLHttpRequest();
+   emacspeakConnection.overrideMimeType('text/xml');
+   emacspeakConnection.open('POST', 'http://127.0.0.1:8000', true);
+   emacspeakConnection.setRequestHeader('Content-Type',
+                                        'application/x-www-form-urlencoded');
+   emacspeakConnection.send('stop');
+};