1 /*
   2  * Copyright (C) 2007 Apple Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25 
  26 #pragma once
  27 
  28 #include "DragActions.h"
  29 #include "DragImage.h"
  30 #include "FloatPoint.h"
  31 #include "IntPoint.h"
  32 
  33 namespace WebCore {
  34 
  35 class DataTransfer;
  36 class DragData;
  37 class Element;
  38 class Frame;
  39 class Image;
  40 
  41 class DragClient {
  42 public:
  43     virtual void dragControllerDestroyed() = 0;
  44 
  45     virtual void willPerformDragDestinationAction(DragDestinationAction, const DragData&) = 0;
  46     virtual void willPerformDragSourceAction(DragSourceAction, const IntPoint&, DataTransfer&) = 0;
  47     virtual DragDestinationAction actionMaskForDrag(const DragData&) = 0;
  48     virtual DragSourceAction dragSourceActionMaskForPoint(const IntPoint& rootViewPoint) = 0;
  49 
  50     virtual void startDrag(DragImage, const IntPoint& dragImageOrigin, const IntPoint& eventPos, const FloatPoint& dragImageAnchor, DataTransfer&, Frame&, DragSourceAction) = 0;
  51     virtual void dragEnded() { }
  52 
  53 #if PLATFORM(COCOA)
  54     // Mac-specific helper function to allow access to web archives and NSPasteboard extras in WebKit.
  55     // This is not abstract as that would require another #if PLATFORM(COCOA) for the SVGImage client empty implentation.
  56     virtual void declareAndWriteDragImage(const String&, Element&, const URL&, const String&, Frame*) { }
  57 #if ENABLE(ATTACHMENT_ELEMENT)
  58     virtual void declareAndWriteAttachment(const String&, Element&, const URL&, const String&, Frame*) { }
  59 #endif
  60 #endif
  61 
  62     virtual ~DragClient() { }
  63 };
  64 
  65 } // namespace WebCore