ui/views/accessibility/native_view_accessibility.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_H_
   6 #define UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_H_
   7
   8 #include "ui/accessibility/ax_node_data.h"
   9 #include "ui/accessibility/platform/ax_platform_node.h"
  10 #include "ui/accessibility/platform/ax_platform_node_delegate.h"
  11 #include "ui/gfx/native_widget_types.h"
  12 #include "ui/views/views_export.h"
  13
  14 namespace views {
  15
  16 class View;
  17
  18 class VIEWS_EXPORT NativeViewAccessibility : public ui::AXPlatformNodeDelegate {
  19  public:
  20   static NativeViewAccessibility* Create(View* view);
  21
  22   virtual gfx::NativeViewAccessible GetNativeObject();
  23
  24   // Call Destroy rather than deleting this, because the subclass may
  25   // use reference counting.
  26   virtual void Destroy();
  27
  28   // WebViews need to be registered because they implement their own
  29   // tree of accessibility objects, and we need to check them when
  30   // mapping a child id to a NativeViewAccessible.
  31   static void RegisterWebView(View* web_view);
  32   static void UnregisterWebView(View* web_view);
  33
  34   // ui::AXPlatformNodeDelegate
  35   virtual ui::AXNodeData* GetData() OVERRIDE;
  36   virtual int GetChildCount() OVERRIDE;
  37   virtual gfx::NativeViewAccessible ChildAtIndex(int index) OVERRIDE;
  38   virtual gfx::NativeViewAccessible GetParent() OVERRIDE;
  39   virtual gfx::Vector2d GetGlobalCoordinateOffset() OVERRIDE;
  40   virtual void NotifyAccessibilityEvent(ui::AXEvent event_type) OVERRIDE;
  41
  42  protected:
  43   NativeViewAccessibility();
  44   virtual ~NativeViewAccessibility();
  45
  46   void set_view(views::View* view) { view_ = view; }
  47   const View* view() const { return view_; }
  48
  49   View* view_;  // Weak. Owns this.
  50
  51  private:
  52   // We own this, but it is reference-counted on some platforms so we can't use
  53   // a scoped_ptr. It is dereferenced in the destructor.
  54   ui::AXPlatformNode* ax_node_;
  55
  56   ui::AXNodeData data_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(NativeViewAccessibility);
  59 };
  60
  61 }  // namespace views
  62
  63 #endif  // UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_H_