Support navigation within editable nodes.

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 308 matching lines @@
     if (!evt.target.state.focused)
       return;
 
     if (!ChromeVoxState.instance.currentRange) {
       this.onEventDefault(evt);
       ChromeVoxState.instance.setCurrentRange(
           cursors.Range.fromNode(evt.target));
     }
 
     this.createTextEditHandlerIfNeeded_(evt.target);
+
+    // Sync the ChromeVox range to the editable, if a selection exists.
+    var anchorObject = evt.target.root.anchorObject;
+    var anchorOffset = evt.target.root.anchorOffset;
+    var focusObject = evt.target.root.focusObject;
+    var focusOffset = evt.target.root.focusOffset;
+    if (anchorObject && focusObject) {
+      var selectedRange = new cursors.Range(
+          new cursors.WrappingCursor(anchorObject, anchorOffset),
+          new cursors.WrappingCursor(focusObject, focusOffset));
+
+      // Sync ChromeVox range with selection.
+      ChromeVoxState.instance.setCurrentRange(selectedRange);
+    }
+
     // TODO(plundblad): This can currently be null for contenteditables.
     // Clean up when it can't.
     if (this.textEditHandler_)
       this.textEditHandler_.onEvent(evt);
   },
 
   /**
    * Provides all feedback once a value changed event fires.
    * @param {!AutomationEvent} evt
    */
@@ skipping 95 matching lines @@
 DesktopAutomationHandler.init_ = function() {
   chrome.automation.getDesktop(function(desktop) {
     ChromeVoxState.desktopAutomationHandler =
         new DesktopAutomationHandler(desktop);
   });
 };
 
 DesktopAutomationHandler.init_();
 
 });  // goog.scope