Switch to selected 8-dot braille table in email and url text fields

chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js

 // Copyright 2015 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 Handles automation from a desktop automation node.
  */
 
 goog.provide('DesktopAutomationHandler');
 
@@ skipping 263 matching lines @@
 
     this.onActiveDescendantChanged(evt);
   },
 
   /**
    * Provides all feedback once a focus event fires.
    * @param {!AutomationEvent} evt
    */
   onFocus: function(evt) {
     // Invalidate any previous editable text handler state.
-    this.textEditHandler_ = null;
+    if (this.textEditHandler_) {
+      this.textEditHandler_.invalidate();
+      this.textEditHandler_ = null;
+    }
 
     var node = evt.target;
 
     // Discard focus events on embeddedObject.
     if (node.role == RoleType.EMBEDDED_OBJECT)
       return;
 
     this.createTextEditHandlerIfNeeded_(evt.target);
 
     // Category flush speech triggered by events with no source. This includes
@@ skipping 178 matching lines @@
       new Output().withLocation(currentRange, null, evt.type).go();
   },
 
   /**
    * @param {!AutomationEvent} evt
    */
   onSelection: function(evt) {
     // Invalidate any previous editable text handler state since some nodes,
     // like menuitems, can receive selection while focus remains on an editable
     // leading to braille output routing to the editable.
-    this.textEditHandler_ = null;
+    if (this.textEditHandler_) {
+      this.textEditHandler_.invalidate();
+      this.textEditHandler_ = null;
+    }
 
     chrome.automation.getFocus(function(focus) {
       // Desktop tabs get "selection" when there's a focused webview during tab
       // switching.
       if (focus.role == RoleType.WEB_VIEW && evt.target.role == RoleType.TAB) {
         ChromeVoxState.instance.setCurrentRange(
             cursors.Range.fromNode(focus.firstChild));
         return;
       }
 
@@ skipping 34 matching lines @@
     }.bind(this));
   },
 
   /**
    * Create an editable text handler for the given node if needed.
    * @param {!AutomationNode} node
    */
   createTextEditHandlerIfNeeded_: function(node) {
     if (!this.textEditHandler_ ||
         this.textEditHandler_.node !== node) {
+      if (this.textEditHandler_)
+        this.textEditHandler_.invalidate();
+
       this.textEditHandler_ = editing.TextEditHandler.createForNode(node);
     }
   },
 
   /**
    * Once an event handler updates ChromeVox's range based on |evt|
    * which updates mode, returns whether |evt| should be outputted.
    * @return {boolean}
    */
   shouldOutput_: function(evt) {
@@ skipping 13 matching lines @@
 DesktopAutomationHandler.init_ = function() {
   chrome.automation.getDesktop(function(desktop) {
     ChromeVoxState.desktopAutomationHandler =
         new DesktopAutomationHandler(desktop);
   });
 };
 
 DesktopAutomationHandler.init_();
 
 });  // goog.scope