Windows accessibility improvements: 1. All WebKit roles are now passed to the...

chrome/browser/browser_accessibility_manager.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_BROWSER_ACCESSIBILITY_MANAGER_H_
 #define CHROME_BROWSER_BROWSER_ACCESSIBILITY_MANAGER_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <oleacc.h>
@@ skipping 11 matching lines @@
 
 class BrowserAccessibilityFactory {
  public:
   virtual ~BrowserAccessibilityFactory() {}
 
   // Create an instance of BrowserAccessibility and return a new
   // reference to it.
   virtual BrowserAccessibility* Create();
 };
 
+// Class that can perform actions on behalf of the BrowserAccessibilityManager.
+class BrowserAccessibilityDelegate {
+ public:
+  virtual ~BrowserAccessibilityDelegate() {}
+  virtual void SetAccessibilityFocus(int acc_obj_id) = 0;
+  virtual void AccessibilityDoDefaultAction(int acc_obj_id) = 0;
+};
+
 // Manages a tree of BrowserAccessibility objects.
 class BrowserAccessibilityManager {
  public:
   BrowserAccessibilityManager(
       HWND parent_hwnd,
       const webkit_glue::WebAccessibility& src,
+      BrowserAccessibilityDelegate* delegate,
       BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory());
 
   virtual ~BrowserAccessibilityManager();
 
   // Return a pointer to the root of the tree, does not make a new reference.
   BrowserAccessibility* GetRoot();
 
   // Return a pointer to the object corresponding to the given child_id,
   // does not make a new reference.
   BrowserAccessibility* GetFromChildID(LONG child_id);
 
   // Get a the default IAccessible for the parent window, does not make a
   // new reference.
   IAccessible* GetParentWindowIAccessible();
 
   // Get the parent window.
   HWND GetParentHWND();
 
   // Return the object that has focus, if it's a descandant of the
   // given root (inclusive). Does not make a new reference.
   BrowserAccessibility* GetFocus(BrowserAccessibility* root);
 
+  // Tell the renderer to set focus to this node.
+  void SetFocus(const BrowserAccessibility& node);
+
+  // Tell the renderer to do the default action for this node.
+  void DoDefaultAction(const BrowserAccessibility& node);
+
   // Called when the renderer process has notified us of a focus or state
   // change. Send a notification to MSAA clients of the change.
   void OnAccessibilityFocusChange(int acc_obj_id);
   void OnAccessibilityObjectStateChange(int acc_obj_id);
 
  private:
   // Recursively build a tree of BrowserAccessibility objects from
   // the WebAccessibility tree received from the renderer process.
   BrowserAccessibility* CreateAccessibilityTree(
       BrowserAccessibility* parent,
       const webkit_glue::WebAccessibility& src,
       int index_in_parent);
 
   // The parent window.
   HWND parent_hwnd_;
 
+  // The object that can perform actions on our behalf.
+  BrowserAccessibilityDelegate* delegate_;
+
   // Factory to create BrowserAccessibility objects (for dependency injection).
   scoped_ptr<BrowserAccessibilityFactory> factory_;
 
   // A default IAccessible instance for the parent window.
   ScopedComPtr<IAccessible> window_iaccessible_;
 
   // The root of the tree of IAccessible objects and the element that
   // currently has focus, if any.
   BrowserAccessibility* root_;
   BrowserAccessibility* focus_;
 
   // A mapping from the IDs of objects in the renderer, to the child IDs
   // we use internally here.
   base::hash_map<int, LONG> renderer_id_to_child_id_map_;
 
   // A mapping from child IDs to BrowserAccessibility objects.
   base::hash_map<LONG, BrowserAccessibility*> child_id_map_;
 
   // The next child ID to use; static so that they're global to the process.
   // Screen readers cache these IDs to see if they've seen the same object
   // before so we should avoid reusing them within the same project.
   static LONG next_child_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_ACCESSIBILITY_MANAGER_H_