nsDragService.h - mozsearch

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsDragService_h__

#define nsDragService_h__

#include "nsBaseDragService.h"

#include <windows.h>

#include <shlobj.h>

struct IDataObject;

class nsDataObjCollection;

/**

 * Native Win32 DragService wrapper

*/

class nsDragService : public nsBaseDragService {

 public:

  nsDragService();

  virtual ~nsDragService();

  // nsBaseDragService

  MOZ_CAN_RUN_SCRIPT virtual nsresult InvokeDragSessionImpl(

      nsIArray* anArrayTransferables,

      const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,

      uint32_t aActionType);

  // nsIDragSession

  NS_IMETHOD GetData(nsITransferable* aTransferable, uint32_t anItem) override;

  NS_IMETHOD GetNumDropItems(uint32_t* aNumItems) override;

  NS_IMETHOD IsDataFlavorSupported(const char* aDataFlavor,

                                   bool* _retval) override;

  MOZ_CAN_RUN_SCRIPT NS_IMETHOD EndDragSession(bool aDoneDrag,

                                               uint32_t aKeyModifiers) override;

  NS_IMETHOD UpdateDragImage(nsINode* aImage, int32_t aImageX,

                             int32_t aImageY) override;

  // native impl.

  NS_IMETHOD SetIDataObject(IDataObject* aDataObj);

  MOZ_CAN_RUN_SCRIPT nsresult StartInvokingDragSession(IDataObject* aDataObj,

                                                       uint32_t aActionType);

  // A drop occurred within the application vs. outside of it.

  void SetDroppedLocal();

  IDataObject* GetDataObject() { return mDataObject; }

 protected:

  nsDataObjCollection* GetDataObjCollection(IDataObject* aDataObj);

  // determine if we have a single data object or one of our private

  // collections

  bool IsCollectionObject(IDataObject* inDataObj);

  // Create a bitmap for drag operations

  bool CreateDragImage(nsINode* aDOMNode,

                       const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,

                       SHDRAGIMAGE* psdi);

  IDataObject* mDataObject;

  bool mSentLocalDropEvent;

};

#endif  // nsDragService_h__