widget/cocoa/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 "nsChildView.h"
  11
  12 #include <Cocoa/Cocoa.h>
  13
  14 class nsDragService : public nsBaseDragService {
  15  public:
  16   nsDragService();
  17
  18   // nsBaseDragService
  19   MOZ_CAN_RUN_SCRIPT virtual nsresult InvokeDragSessionImpl(
  20       nsIArray* anArrayTransferables,
  21       const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
  22       uint32_t aActionType) override;
  23   // nsIDragService
  24   MOZ_CAN_RUN_SCRIPT NS_IMETHOD EndDragSession(bool aDoneDrag,
  25                                                uint32_t aKeyModifiers) override;
  26   NS_IMETHOD UpdateDragImage(nsINode* aImage, int32_t aImageX,
  27                              int32_t aImageY) override;
  28
  29   // nsIDragSession
  30   NS_IMETHOD GetData(nsITransferable* aTransferable,
  31                      uint32_t aItemIndex) override;
  32   NS_IMETHOD IsDataFlavorSupported(const char* aDataFlavor,
  33                                    bool* _retval) override;
  34   NS_IMETHOD GetNumDropItems(uint32_t* aNumItems) override;
  35
  36   void DragMovedWithView(NSDraggingSession* aSession, NSPoint aPoint);
  37
  38  protected:
  39   virtual ~nsDragService();
  40
  41  private:
  42   // Creates and returns the drag image for a drag. aImagePoint will be set to
  43   // the origin of the drag relative to mNativeDragView.
  44   NSImage* ConstructDragImage(
  45       nsINode* aDOMNode, const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
  46       NSPoint* aImagePoint);
  47
  48   // Creates and returns the drag image for a drag. aPoint should be the origin
  49   // of the drag, for example the mouse coordinate of the mousedown event.
  50   // aDragRect will be set the area of the drag relative to this.
  51   NSImage* ConstructDragImage(
  52       nsINode* aDOMNode, const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
  53       mozilla::CSSIntPoint aPoint, mozilla::LayoutDeviceIntRect* aDragRect);
  54
  55   nsCOMPtr<nsIArray> mDataItems;  // only valid for a drag started within gecko
  56   ChildView* mNativeDragView;
  57   NSEvent* mNativeDragEvent;
  58
  59   bool mDragImageChanged;
  60 };
  61
  62 #endif  // nsDragService_h_