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 "nsChildView.h"

#include <Cocoa/Cocoa.h>

class nsDragService : public nsBaseDragService {

 public:

  nsDragService();

  // nsBaseDragService

  MOZ_CAN_RUN_SCRIPT virtual nsresult InvokeDragSessionImpl(

      nsIArray* anArrayTransferables,

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

      uint32_t aActionType) override;

  // nsIDragService

  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;

  // nsIDragSession

  NS_IMETHOD GetData(nsITransferable* aTransferable,

                     uint32_t aItemIndex) override;

  NS_IMETHOD IsDataFlavorSupported(const char* aDataFlavor,

                                   bool* _retval) override;

  NS_IMETHOD GetNumDropItems(uint32_t* aNumItems) override;

  void DragMovedWithView(NSDraggingSession* aSession, NSPoint aPoint);

 protected:

  virtual ~nsDragService();

 private:

  // Creates and returns the drag image for a drag. aImagePoint will be set to

  // the origin of the drag relative to mNativeDragView.

  NSImage* ConstructDragImage(

      nsINode* aDOMNode, const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,

      NSPoint* aImagePoint);

  // Creates and returns the drag image for a drag. aPoint should be the origin

  // of the drag, for example the mouse coordinate of the mousedown event.

  // aDragRect will be set the area of the drag relative to this.

  NSImage* ConstructDragImage(

      nsINode* aDOMNode, const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,

      mozilla::CSSIntPoint aPoint, mozilla::LayoutDeviceIntRect* aDragRect);

  nsCOMPtr<nsIArray> mDataItems;  // only valid for a drag started within gecko

  ChildView* mNativeDragView;

  NSEvent* mNativeDragEvent;

  bool mDragImageChanged;

};

#endif  // nsDragService_h_