Make keyboard overlay speak when ChromeVox is active

chrome/browser/resources/keyboard_overlay_accessibility_helper.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.
+
+// An object to implement keyboard overlay accessiblity.
+var KeyboardOverlayAccessibilityHelper = {
+  // Returns true when ChromeVox is loaded and active, false otherwise.
+  cvoxIsActive: function() {
+    return window.cvox && window.cvox.Api.isChromeVoxActive();
+  },
+  // Speaks all the shortcut with the given modifiers.
+  maybeSpeakAllShortcuts: function(modifiers) {
+    if (!this.cvoxIsActive())
+      return;
+    cvox.Api.stop();
+    var keyboardGlyphData = getKeyboardGlyphData();
+    var shortcutData = getShortcutData();
+    var layout = getLayouts()[keyboardGlyphData.layoutName];
+    var keysToShortcutText = {};
+    for (var i = 0; i < layout.length; ++i) {
+      var identifier = remapIdentifier(layout[i][0]);
+      var keyData = keyboardGlyphData.keys[identifier];
+      var keyLabel = getKeyLabel(keyData, modifiers);
+      var shortcutId = shortcutData[getAction(keyLabel, modifiers)];
+      var shortcutText = templateData[shortcutId];
+      var keysText = modifiers.concat(keyLabel).join(' + ');
+      if (shortcutText)
+        keysToShortcutText[keysText] = shortcutText;
+    }
+    for (var keysText in keysToShortcutText) {
+      this.speakShortcut_(keysText, keysToShortcutText[keysText]);
+    }
+  },
+  // Speaks given shortcut description.
+  speakShortcut_: function(keysText, shortcutText) {
+    keysText = keysText.toLowerCase();  // For correct pronunciation.
+    cvox.Api.speak(keysText, 1, {});
+    cvox.Api.speak(shortcutText, 1, {});
+  },

[hashimoto, 2011/08/16 07:54:56]

Moved speakShortcut to the end part of the class because it's now private

+};