Finish implementing ChromeVox Next active indicator.

chrome/common/extensions/api/automation.idl

 // 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.
 
 // The <code>chrome.automation</code> API allows developers to access the
 // automation (accessibility) tree for the browser. The tree resembles the DOM
 // tree, but only exposes the <em>semantic</em> structure of a page. It can be
 // used to programmatically interact with a page by examining names, roles, and
 // states, listening for events, and performing actions on nodes.
 [nocompile] namespace automation {
@@ skipping 316 matching lines @@
 
     // Whether this AutomationNode is a root node.
     boolean isRootNode;
 
     // The role of this node.
     automation.RoleType role;
 
     // The $(ref:automation.StateType)s describing this node.
     object state;
 
-    // The rendered location (as a bounding box) of this node within the frame.
+    // The rendered location (as a bounding box) of this node in global
+    // screen coordinates.
     automation.Rect location;
 
+    // Computes the bounding box of a subrange of this node in global screen
+    // coordinates.  Returns the same as |location| if range information

[Peter Lundblad, 2015/11/23 13:39:08]

Uber-nit: the standard in this file is one space after period.

[dmazzoni, 2015/11/23 17:22:49]

Done.

+    // is not available. The start and end indices are zero-based offsets
+    // into the node's "name" string attribute.
+    static automation.Rect boundsForRange(long startIndex, long endIndex);
+
     // The purpose of the node, other than the role, if any.
     DOMString description;
 
     // The help text for the node, if any.
     DOMString help;
 
     // The accessible name for this node, via the
     // <a href="http://www.w3.org/TR/wai-aria/roles#namecalculation">
     // Accessible Name Calculation</a> process.
     DOMString name;
@@ skipping 235 matching lines @@
     // Everything in the tree between the two node/offset pairs gets included
     // in the selection. The anchor is where the user started the selection,
     // while the focus is the point at which the selection gets extended
     // e.g. when dragging with a mouse or using the keyboard. For nodes with
     // the role staticText, the offset gives the character offset within
     // the value where the selection starts or ends, respectively.
     [nocompile] static void setDocumentSelection(
         SetDocumentSelectionParams params);
   };
 };