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  *  Windows native nsIDragSession implementation
  18  */
  19 class nsDragSession : public nsBaseDragSession {
  20  public:
  21   virtual ~nsDragSession();
  22
  23   // nsIDragSession
  24   NS_IMETHOD GetData(nsITransferable* aTransferable, uint32_t anItem) override;
  25   NS_IMETHOD GetNumDropItems(uint32_t* aNumItems) override;
  26   NS_IMETHOD IsDataFlavorSupported(const char* aDataFlavor,
  27                                    bool* _retval) override;
  28   NS_IMETHOD UpdateDragImage(nsINode* aImage, int32_t aImageX,
  29                              int32_t aImageY) override;
  30   void SetIDataObject(IDataObject* aDataObj);
  31   IDataObject* GetDataObject() { return mDataObject; }
  32
  33   MOZ_CAN_RUN_SCRIPT virtual nsresult InvokeDragSessionImpl(
  34       nsIWidget* aWidget, nsIArray* anArrayTransferables,
  35       const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
  36       uint32_t aActionType);
  37
  38   MOZ_CAN_RUN_SCRIPT nsresult
  39   EndDragSessionImpl(bool aDoneDrag, uint32_t aKeyModifiers) override;
  40
  41   MOZ_CAN_RUN_SCRIPT nsresult StartInvokingDragSession(nsIWidget* aWidget,
  42                                                        IDataObject* aDataObj,
  43                                                        uint32_t aActionType);
  44
  45   // A drop occurred within the application vs. outside of it.
  46   void SetDroppedLocal();
  47
  48  protected:
  49   // determine if we have a single data object or one of our private
  50   // collections
  51   static bool IsCollectionObject(IDataObject* inDataObj);
  52   static nsDataObjCollection* GetDataObjCollection(IDataObject* aDataObj);
  53
  54   // Create a bitmap for drag operations
  55   bool CreateDragImage(nsINode* aDOMNode,
  56                        const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
  57                        SHDRAGIMAGE* psdi);
  58
  59   IDataObject* mDataObject = nullptr;
  60   bool mSentLocalDropEvent = false;
  61 };
  62
  63 /**
  64  *  Windows native nsIDragService implementation
  65  */
  66 class nsDragService final : public nsBaseDragService {
  67  public:
  68   already_AddRefed<nsIDragSession> CreateDragSession() override;
  69 };
  70
  71 #endif  // nsDragService_h__