Make BrowserAccessibilityManager cross platform. Step 2.

chrome/browser/accessibility/browser_accessibility_manager_win.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_MANAGER_WIN_H_
 #define CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
 #pragma once
 
-#include <atlbase.h>
-#include <atlcom.h>
 #include <oleacc.h>
 
-#include <hash_map>
-#include <vector>
-
+#include "base/scoped_comptr_win.h"
 #include "chrome/browser/accessibility/browser_accessibility_manager.h"
-#include "base/hash_tables.h"
-#include "base/scoped_comptr_win.h"
-#include "base/scoped_ptr.h"
+#include "chrome/common/render_messages_params.h"
 #include "webkit/glue/webaccessibility.h"
 
 class BrowserAccessibilityWin;
 struct ViewHostMsg_AccessibilityNotification_Params;
 
-class BrowserAccessibilityWinFactory {
- public:
-  virtual ~BrowserAccessibilityWinFactory() {}
-
-  // Create an instance of BrowserAccessibilityWin and return a new
-  // reference to it.
-  virtual BrowserAccessibilityWin* Create();
-};
+using webkit_glue::WebAccessibility;
 
 // Manages a tree of BrowserAccessibilityWin objects.
 class BrowserAccessibilityManagerWin : public BrowserAccessibilityManager {
  public:
-  BrowserAccessibilityManagerWin(
-      HWND parent_window,
-      const webkit_glue::WebAccessibility& src,
-      BrowserAccessibilityDelegate* delegate,
-      BrowserAccessibilityWinFactory* factory =
-          new BrowserAccessibilityWinFactory());
-
   virtual ~BrowserAccessibilityManagerWin();
 
-  // Return a pointer to the root of the tree, does not make a new reference.
-  BrowserAccessibilityWin* GetRoot();
-
-  // Removes the BrowserAccessibilityWin child_id from the manager.
-  void Remove(LONG child_id);
-
-  // Return a pointer to the object corresponding to the given child_id,
-  // does not make a new reference.
-  BrowserAccessibilityWin* GetFromChildID(LONG child_id);
-
   // Get a the default IAccessible for the parent window, does not make a
   // new reference.
   IAccessible* GetParentWindowIAccessible();
 
-  // Return the object that has focus, if it's a descandant of the
-  // given root (inclusive). Does not make a new reference.
-  BrowserAccessibilityWin* GetFocus(BrowserAccessibilityWin* root);
-
-  // Tell the renderer to set focus to this node.
-  void SetFocus(const BrowserAccessibilityWin& node);
-
-  // Tell the renderer to do the default action for this node.
-  void DoDefaultAction(const BrowserAccessibilityWin& node);
-
-  // BrowserAccessibilityManager Methods
-  virtual void GotFocus();
-  virtual IAccessible* GetRootAccessible();
-  virtual void OnAccessibilityObjectStateChange(
-      const webkit_glue::WebAccessibility& acc_obj);
-  virtual void OnAccessibilityObjectChildrenChange(
-      const webkit_glue::WebAccessibility& acc_obj);
-  virtual void OnAccessibilityObjectFocusChange(
-      const webkit_glue::WebAccessibility& acc_obj);
-  virtual void OnAccessibilityObjectLoadComplete(
-      const webkit_glue::WebAccessibility& acc_obj);
-  virtual void OnAccessibilityObjectValueChange(
-      const webkit_glue::WebAccessibility& acc_obj);
-  virtual void OnAccessibilityObjectTextChange(
-      const webkit_glue::WebAccessibility& acc_obj);
+  // BrowserAccessibilityManager methods
+  virtual void NotifyAccessibilityEvent(
+      ViewHostMsg_AccessibilityNotification_Params::NotificationType n,
+      BrowserAccessibility* node);
 
  private:
-  // Recursively compare the IDs of our subtree to a new subtree received
-  // from the renderer and return true if their IDs match exactly.
-  bool CanModifyTreeInPlace(
-      BrowserAccessibilityWin* current_root,
-      const webkit_glue::WebAccessibility& new_root);
-
-  // Recursively modify a subtree (by reinitializing) to match a new
-  // subtree received from the renderer process. Should only be called
-  // if CanModifyTreeInPlace returned true.
-  void ModifyTreeInPlace(
-      BrowserAccessibilityWin* current_root,
-      const webkit_glue::WebAccessibility& new_root);
-
-  // Update the accessibility tree with an updated WebAccessibility tree or
-  // subtree received from the renderer process. First attempts to modify
-  // the tree in place, and if that fails, replaces the entire subtree.
-  // Returns the updated node or NULL if no node was updated.
-  BrowserAccessibilityWin* UpdateTree(
-      const webkit_glue::WebAccessibility& acc_obj);
-
-  // Returns the next MSAA child id.
-  static LONG GetNextChildID();
-
-  // Recursively build a tree of BrowserAccessibilityWin objects from
-  // the WebAccessibility tree received from the renderer process.
-  BrowserAccessibilityWin* CreateAccessibilityTree(
-      BrowserAccessibilityWin* parent,
-      int child_id,
-      const webkit_glue::WebAccessibility& src,
-      int index_in_parent);
-
-  // The object that can perform actions on our behalf.
-  BrowserAccessibilityDelegate* delegate_;
-
-  // Factory to create BrowserAccessibility objects (for dependency injection).
-  scoped_ptr<BrowserAccessibilityWinFactory> factory_;
+  BrowserAccessibilityManagerWin(
+      HWND parent_window,
+      const WebAccessibility& src,
+      BrowserAccessibilityDelegate* delegate,
+      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.
-  BrowserAccessibilityWin* root_;
-  BrowserAccessibilityWin* 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 BrowserAccessibilityWin objects.
-  base::hash_map<LONG, BrowserAccessibilityWin*> 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_;
+  // Give BrowserAccessibilityManager::Create access to our constructor.
+  friend class BrowserAccessibilityManager;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerWin);
 };
 
 #endif  // CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_