widget/windows/nsDragService.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef nsDragService_h__
   7 #define nsDragService_h__
   8
   9 #include "nsBaseDragService.h"
  10 #include <windows.h>
  11 #include <shlobj.h>
  12
  13 struct IDataObject;
  14 class nsDataObjCollection;
  15
  16 /**
  17  * Native Win32 DragService wrapper
  18  */
  19
  20 class nsDragService : public nsBaseDragService {
  21  public:
  22   nsDragService();
  23   virtual ~nsDragService();
  24
  25   // nsBaseDragService
  26   MOZ_CAN_RUN_SCRIPT virtual nsresult InvokeDragSessionImpl(
  27       nsIArray* anArrayTransferables,
  28       const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
  29       uint32_t aActionType);
  30
  31   // nsIDragSession
  32   NS_IMETHOD GetData(nsITransferable* aTransferable, uint32_t anItem) override;
  33   NS_IMETHOD GetNumDropItems(uint32_t* aNumItems) override;
  34   NS_IMETHOD IsDataFlavorSupported(const char* aDataFlavor,
  35                                    bool* _retval) override;
  36   MOZ_CAN_RUN_SCRIPT NS_IMETHOD EndDragSession(bool aDoneDrag,
  37                                                uint32_t aKeyModifiers) override;
  38   NS_IMETHOD UpdateDragImage(nsINode* aImage, int32_t aImageX,
  39                              int32_t aImageY) override;
  40
  41   // native impl.
  42   NS_IMETHOD SetIDataObject(IDataObject* aDataObj);
  43   MOZ_CAN_RUN_SCRIPT nsresult StartInvokingDragSession(IDataObject* aDataObj,
  44                                                        uint32_t aActionType);
  45
  46   // A drop occurred within the application vs. outside of it.
  47   void SetDroppedLocal();
  48
  49   IDataObject* GetDataObject() { return mDataObject; }
  50
  51  protected:
  52   nsDataObjCollection* GetDataObjCollection(IDataObject* aDataObj);
  53
  54   // determine if we have a single data object or one of our private
  55   // collections
  56   bool IsCollectionObject(IDataObject* inDataObj);
  57
  58   // Create a bitmap for drag operations
  59   bool CreateDragImage(nsINode* aDOMNode,
  60                        const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
  61                        SHDRAGIMAGE* psdi);
  62
  63   IDataObject* mDataObject;
  64   bool mSentLocalDropEvent;
  65 };
  66
  67 #endif  // nsDragService_h__