text: /*
   * Copyright (C) 2007 Apple Inc.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
   */
  
  #pragma once
  
  #include "DragActions.h"
  #include "DragData.h"
  #include "DragItem.h"
  #include "FloatPoint.h"
  #include "IntPoint.h"
  
  namespace WebCore {
      
  class DataTransfer;
  class Element;
  class Frame;
  class Image;
  struct PromisedBlobInfo;
  
  class DragClient {
  public:
      virtual void dragControllerDestroyed() = 0;
  
      virtual bool useLegacyDragClient() { return true; }
  
      virtual void willPerformDragDestinationAction(DragDestinationAction, const DragData&) = 0;
      virtual void willPerformDragSourceAction(DragSourceAction, const IntPoint&, DataTransfer&) = 0;
      virtual void didConcludeEditDrag() { }
      virtual DragSourceAction dragSourceActionMaskForPoint(const IntPoint& rootViewPoint) = 0;
      
      virtual void startDrag(DragItem, DataTransfer&, Frame&) = 0;
      virtual void dragEnded() { }
  
      virtual void beginDrag(DragItem, Frame&, const IntPoint&, const IntPoint&, DataTransfer&, DragSourceAction) { }
  
  #if PLATFORM(COCOA)
      // Mac-specific helper function to allow access to web archives and NSPasteboard extras in WebKit.
      // This is not abstract as that would require another #if PLATFORM(COCOA) for the SVGImage client empty implentation.
      virtual void declareAndWriteDragImage(const String&, Element&, const URL&, const String&, Frame*) { }
  #endif
  
      virtual ~DragClient() = default;
  };
      
  } // namespace WebCore
  