text: // Copyright (c) 2012 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_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_WIN_H_
  #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_WIN_H_
  
  #include <wrl/client.h>
  
  #include "base/compiler_specific.h"
  #include "base/macros.h"
  #include "base/memory/ref_counted.h"
  #include "base/memory/weak_ptr.h"
  #include "ui/aura/client/drag_drop_client.h"
  #include "ui/views/views_export.h"
  
  namespace ui {
  class DragSourceWin;
  }
  
  namespace views {
  class DesktopDropTargetWin;
  
  class VIEWS_EXPORT DesktopDragDropClientWin
      : public aura::client::DragDropClient {
   public:
    DesktopDragDropClientWin(aura::Window* root_window, HWND window);
    ~DesktopDragDropClientWin() override;
  
    // Overridden from aura::client::DragDropClient:
    int StartDragAndDrop(const ui::OSExchangeData& data,
                         aura::Window* root_window,
                         aura::Window* source_window,
                         const gfx::Point& screen_location,
                         int operation,
                         ui::DragDropTypes::DragEventSource source) override;
    void DragCancel() override;
    bool IsDragDropInProgress() override;
  
    void OnNativeWidgetDestroying(HWND window);
  
   private:
    bool drag_drop_in_progress_;
  
    int drag_operation_;
  
    Microsoft::WRL::ComPtr<ui::DragSourceWin> drag_source_;
  
    scoped_refptr<DesktopDropTargetWin> drop_target_;
  
    base::WeakPtrFactory<DesktopDragDropClientWin> weak_factory_;
  
    DISALLOW_COPY_AND_ASSIGN(DesktopDragDropClientWin);
  };
  
  }  // namespace views
  
  #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_WIN_H_
  