Revert 61704 - Make BrowserAccessibilityManager cross platform. Step 2. In Pr...

chrome/browser/accessibility/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_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_
 #define CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <oleacc.h>
 #endif
 
 #include <vector>
 
-#include "base/hash_tables.h"
-#include "base/scoped_ptr.h"
-#include "chrome/common/render_messages_params.h"
 #include "gfx/native_widget_types.h"
 #include "webkit/glue/webaccessibility.h"
 
-
-class BrowserAccessibility;
-#if defined(OS_WIN)
-class BrowserAccessibilityManagerWin;
-#endif
+struct ViewHostMsg_AccessibilityNotification_Params;
 
 using webkit_glue::WebAccessibility;
 
 // 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;
   virtual bool HasFocus() = 0;
 };
 
-class BrowserAccessibilityFactory {
- public:
-  virtual ~BrowserAccessibilityFactory() {}
-
-  // Create an instance of BrowserAccessibility and return a new
-  // reference to it.
-  virtual BrowserAccessibility* Create();
-};
-
 // Manages a tree of BrowserAccessibility objects.
 class BrowserAccessibilityManager {
  public:
   // Creates the platform specific BrowserAccessibilityManager. Ownership passes
   // to the caller.
   static BrowserAccessibilityManager* Create(
-    gfx::NativeView parent_view,
-    const WebAccessibility& src,
-    BrowserAccessibilityDelegate* delegate,
-    BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory());
+    gfx::NativeWindow parent_window,
+    const webkit_glue::WebAccessibility& src,
+    BrowserAccessibilityDelegate* delegate);
 
   virtual ~BrowserAccessibilityManager();
 
-  virtual void NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Params::NotificationType n,
-      BrowserAccessibility* node) = 0;
-
-  // Returns the next unique child id.
-  static int32 GetNextChildID();
-
-  // Return a pointer to the root of the tree, does not make a new reference.
-  BrowserAccessibility* GetRoot();
-
-  // Removes the BrowserAccessibility child_id from the manager.
-  void Remove(int32 child_id);
-
-  // Return a pointer to the object corresponding to the given child_id,
-  // does not make a new reference.
-  BrowserAccessibility* GetFromChildID(int32 child_id);
-
   // Called to notify the accessibility manager that its associated native
-  // view got focused.
-  void GotFocus();
-
-  // 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);
+  // window got focused.
+  virtual void GotFocus() = 0;
 
   // Called when the renderer process has notified us of about tree changes.
   // Send a notification to MSAA clients of the change.
   void OnAccessibilityNotifications(
     const std::vector<ViewHostMsg_AccessibilityNotification_Params>& params);
 
-  gfx::NativeView GetParentView();
+  gfx::NativeWindow GetParentWindow();
 
 #if defined(OS_WIN)
-  BrowserAccessibilityManagerWin* toBrowserAccessibilityManagerWin();
+  virtual IAccessible* GetRootAccessible() = 0;
 #endif
 
-  // 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);
+ protected:
+  explicit BrowserAccessibilityManager(gfx::NativeWindow parent_window);
 
- protected:
-  BrowserAccessibilityManager(
-      gfx::NativeView parent_view,
-      const WebAccessibility& src,
-      BrowserAccessibilityDelegate* delegate,
-      BrowserAccessibilityFactory* factory);
+  virtual void OnAccessibilityObjectStateChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectChildrenChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectFocusChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectLoadComplete(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectValueChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectTextChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
 
  private:
-  void OnAccessibilityObjectStateChange(
-      const WebAccessibility& acc_obj);
-  void OnAccessibilityObjectChildrenChange(
-      const WebAccessibility& acc_obj);
-  void OnAccessibilityObjectFocusChange(
-      const WebAccessibility& acc_obj);
-  void OnAccessibilityObjectLoadComplete(
-      const WebAccessibility& acc_obj);
-  void OnAccessibilityObjectValueChange(
-      const WebAccessibility& acc_obj);
-  void OnAccessibilityObjectTextChange(
-      const WebAccessibility& acc_obj);
-
-  // 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(
-      BrowserAccessibility* current_root,
-      const 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(
-      BrowserAccessibility* current_root,
-      const 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.
-  BrowserAccessibility* UpdateTree(
-      const WebAccessibility& acc_obj);
-
-  // Recursively build a tree of BrowserAccessibility objects from
-  // the WebAccessibility tree received from the renderer process.
-  BrowserAccessibility* CreateAccessibilityTree(
-      BrowserAccessibility* parent,
-      int child_id,
-      const WebAccessibility& src,
-      int index_in_parent);
-
- protected:
-  // The next unique id for a BrowserAccessibility instance.
-  static int32 next_child_id_;
-
-  // The parent view.
-  gfx::NativeView parent_view_;
-
-  // The object that can perform actions on our behalf.
-  BrowserAccessibilityDelegate* delegate_;
-
-  // Factory to create BrowserAccessibility objects (for dependency injection).
-  scoped_ptr<BrowserAccessibilityFactory> factory_;
-
-  // 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, int32> renderer_id_to_child_id_map_;
-
-  // A mapping from child IDs to BrowserAccessibility objects.
-  base::hash_map<int32, BrowserAccessibility*> child_id_map_;
+  // The parent window.
+  gfx::NativeWindow parent_window_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 #endif  // CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_