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

chrome/browser/resources/access_chromevox/chromevox/injected/tools/choice_widget.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 A floating choice widget that can be used as
+ * a replacement for the standard alert() popup, a disambiguation
+ * dialog if multiple targets are available, etc.
+ */
+
+goog.provide('cvox.ChromeVoxChoiceWidget');
+
+goog.require('cvox.AbstractEarcons');
+goog.require('cvox.AbstractTts');
+goog.require('cvox.ChromeVox');
+
+/**
+ * @constructor
+ */
+cvox.ChromeVoxChoiceWidget = function() {
+  this.powerKey = new PowerKey('main', null);
+  this.powerKey.createCompletionField(document.body, 50, null, null, null,
+      false);
+  this.powerKey.setAutoHideCompletionField(true);
+  this.powerKey.setDefaultCSSStyle();
+};
+
+/**
+ * Creates an alert dialog widget given a set of descriptions and associated
+ * functions.
+ *
+ * @param {Array.<string>} descriptions The array of strings to present
+ *     to the user.
+ * @param {Array.<string>} functions The array of functions associated
+ *     with the descriptions.
+ * @param {string} prompt The message to be spoken to the user.
+ */
+cvox.ChromeVoxChoiceWidget.prototype.show = function(descriptions, functions,
+    prompt) {
+  this.powerKey.setCompletionList(descriptions);
+  var completionActionMap = new Object();
+  for (var i = 0, description; description = descriptions[i]; i++) {
+    var action = new Object();
+    action['main'] = functions[i];
+    completionActionMap[description.toLowerCase()] = action;
+  }
+  this.powerKey.setCompletionActionMap(completionActionMap);
+  this.powerKey.setCompletionPromptStr(descriptions.toString());
+  this.powerKey.setBrowseCallback(function(text) {
+    cvox.ChromeVox.tts.speak(text, cvox.AbstractTts.QUEUE_MODE_FLUSH,
+        null);
+  });
+  this.powerKey.updateCompletionField(PowerKey.status.VISIBLE, true, 40, 20);
+  cvox.ChromeVox.earcons.playEarcon(cvox.AbstractEarcons.LISTBOX);
+  window.setTimeout(function() {
+      cvox.ChromeVox.tts.speak(prompt);
+    }, 0);
+};