Support navigation within editable nodes.

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

 // Copyright 2014 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 ChromeVox predicates for the automation extension API.
  */
 
 goog.provide('AutomationPredicate');
 goog.provide('AutomationPredicate.Binary');
@@ skipping 175 matching lines @@
 
 /**
  * Matches against nodes visited during object navigation. An object as
  * defined below, are all nodes that are focusable or static text. When used in
  * tree walking, it should visit all nodes that tab traversal would as well as
  * non-focusable static text.
  * @param {!AutomationNode} node
  * @return {boolean}
  */
 AutomationPredicate.object = function(node) {
+  // Editable nodes are within a text-like field and don't make sense when
+  // performing object navigation. Users should use line, word, or character
+  // navigation. Only navigate to the top level node.
+  if (node.parent && node.parent.state.editable)
+    return false;
+
   return node.state.focusable ||
       (AutomationPredicate.leafOrStaticText(node) &&
        (/\S+/.test(node.name) ||
         (node.role != RoleType.lineBreak &&
          node.role != RoleType.staticText &&
          node.role != RoleType.inlineTextBox)));
 };
 
 /**
  * @param {!AutomationNode} first
@@ skipping 14 matching lines @@
  * @param {!AutomationNode} node
  * @return {boolean}
  */
 AutomationPredicate.container = function(node) {
   return AutomationPredicate.structuralContainer(node) ||
       node.role == RoleType.div ||
       node.role == RoleType.document ||
       node.role == RoleType.group ||
       node.role == RoleType.listItem ||
       node.role == RoleType.toolbar ||
-      node.role == RoleType.window;
+      node.role == RoleType.window ||
+      // For example, crosh.
+      (node.role == RoleType.textField && node.state.readOnly) ||
+      (node.state.editable && node.parent && !node.parent.state.editable);
 };
 
 /**
  * Matches against nodes that contain interesting nodes, but should never be
  * visited.
  * @param {!AutomationNode} node
  * @return {boolean}
  */
 AutomationPredicate.structuralContainer = function(node) {
   return node.role == RoleType.rootWebArea ||
@@ skipping 159 matching lines @@
  * @param {number} level 1-6
  * @return {AutomationPredicate.Unary}
  */
 AutomationPredicate.makeHeadingPredicate = function(level) {
   return function(node) {
     return node.role == RoleType.heading && node.hierarchicalLevel == level;
   };
 };
 
 });  // goog.scope