Add basic support for accessibility hit testing within web contents....

chrome/browser/accessibility/browser_accessibility.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #pragma once
 
 #include <map>
 #include <utility>
@@ skipping 72 matching lines @@
 
   // Return the next sibling of this object, or NULL if it's the last child
   // of its parent.
   BrowserAccessibility* GetNextSibling();
 
   // Replace a child object. Used when updating the accessibility tree.
   void ReplaceChild(
       const BrowserAccessibility* old_acc,
       BrowserAccessibility* new_acc);
 
+  // Returns the bounds of this object in screen coordinates.
+  gfx::Rect GetBoundsRect();
+
+  // Returns the deepest descendant that contains the specified point.
+  BrowserAccessibility* BrowserAccessibilityForPoint(const gfx::Point& point);
+
+  // Return true if this attribute is in the attributes map.
+  bool HasAttribute(WebAccessibility::Attribute attribute);

[dmazzoni, 2010/11/03 02:21:53]

Should the Attribute methods maybe be protected instead of public?

[Chris Guillory, 2010/11/03 17:17:51]

Done.

+
+  // Retrieve the string value of an attribute from the attribute map and
+  // returns true if found.
+  bool GetAttribute(WebAccessibility::Attribute attribute, string16* value);
+
+  // Retrieve the value of an attribute from the attribute map and
+  // if found and nonempty, try to convert it to an integer.
+  // Returns true only if both the attribute was found and it was successfully
+  // converted to an integer.
+  bool GetAttributeAsInt(
+      WebAccessibility::Attribute attribute, int* value_int);
+
   // Accessors
   int32 child_id() const { return child_id_; }
   const std::vector<BrowserAccessibility*>& children() const {
     return children_;
   }
   int32 renderer_id() const { return renderer_id_; }
   int32 index_in_parent() const { return index_in_parent_; }
   WebKit::WebRect location() const { return location_; }
 
 #if defined(OS_MACOSX)
@@ skipping 32 matching lines @@
   int32 role_;
   int32 state_;
   string16 role_name_;
   WebKit::WebRect location_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 #endif  // CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_