Hide AXPlatformNode on ChromeOS.

ui/views/accessibility/native_view_accessibility.h

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Copyright 2017 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 UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_H_
 #define UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_H_
 
 #include <memory>
 
 #include "base/macros.h"
-#include "build/build_config.h"
-#include "ui/accessibility/ax_action_data.h"
-#include "ui/accessibility/ax_node_data.h"
-#include "ui/accessibility/platform/ax_platform_node.h"
-#include "ui/accessibility/platform/ax_platform_node_delegate.h"
+#include "ui/accessibility/ax_enums.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/views_export.h"
-#include "ui/views/widget/widget_observer.h"
-
-// Set PLATFORM_HAS_NATIVE_VIEW_ACCESSIBILITY_IMPL if this platform has a
-// specific implementation of NativeViewAccessibility::Create().
-#undef PLATFORM_HAS_NATIVE_VIEW_ACCESSIBILITY_IMPL
-
-#if defined(OS_WIN)
-#define PLATFORM_HAS_NATIVE_VIEW_ACCESSIBILITY_IMPL 1
-#endif
-
-#if defined(OS_MACOSX)
-#define PLATFORM_HAS_NATIVE_VIEW_ACCESSIBILITY_IMPL 1
-#endif
-
-#if defined(OS_LINUX) && defined(USE_X11) && !defined(OS_CHROMEOS)
-#define PLATFORM_HAS_NATIVE_VIEW_ACCESSIBILITY_IMPL 1
-#endif
 
 namespace views {
 
 class View;
-class Widget;
 
-class VIEWS_EXPORT NativeViewAccessibility
-    : public ui::AXPlatformNodeDelegate,
-      public WidgetObserver {
+// Abstract base for that allows native platform accessibility toolkits to
+// interface with a View.
+class VIEWS_EXPORT NativeViewAccessibility {
  public:
   static std::unique_ptr<NativeViewAccessibility> Create(View* view);
 
-  ~NativeViewAccessibility() override;
+  virtual ~NativeViewAccessibility() {}
 
-  gfx::NativeViewAccessible GetNativeObject();
-
-  void NotifyAccessibilityEvent(ui::AXEvent event_type);
-
-  // Focuses or unfocuses a View.
-  bool SetFocused(bool focused);
-
-  // ui::AXPlatformNodeDelegate
-  const ui::AXNodeData& GetData() override;
-  int GetChildCount() override;
-  gfx::NativeViewAccessible ChildAtIndex(int index) override;
-  gfx::NativeWindow GetTopLevelWidget() override;
-  gfx::NativeViewAccessible GetParent() override;
-  gfx::Vector2d GetGlobalCoordinateOffset() override;
-  gfx::NativeViewAccessible HitTestSync(int x, int y) override;
-  gfx::NativeViewAccessible GetFocus() override;
-  gfx::AcceleratedWidget GetTargetForNativeAccessibilityEvent() override;
-  bool AccessibilityPerformAction(const ui::AXActionData& data) override;
-  void DoDefaultAction() override;
-
-  // WidgetObserver
-  void OnWidgetDestroying(Widget* widget) override;
-
-  Widget* parent_widget() const { return parent_widget_; }
-  void SetParentWidget(Widget* parent_widget);
+  virtual gfx::NativeViewAccessible GetNativeObject() = 0;
+  virtual void NotifyAccessibilityEvent(ui::AXEvent event_type) = 0;
 
  protected:
-  explicit NativeViewAccessibility(View* view);
-
-  // Weak. Owns this.
-  View* view_;
-
-  // Weak. Uses WidgetObserver to clear. This is set on the root view for
-  // a widget that's owned by another widget, so we can walk back up the
-  // tree.
-  Widget* parent_widget_;
+  NativeViewAccessibility() {}
 
  private:
-  void PopulateChildWidgetVector(std::vector<Widget*>* result_child_widgets);
-
-  // We own this, but it is reference-counted on some platforms so we can't use
-  // a scoped_ptr. It is dereferenced in the destructor.
-  ui::AXPlatformNode* ax_node_;
-
-  ui::AXNodeData data_;
-
   DISALLOW_COPY_AND_ASSIGN(NativeViewAccessibility);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_H_