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      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 COMPUTER, 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 COMPUTER, 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 
     27 #ifndef DragClient_h
     28 #define DragClient_h
     29 
     30 #include "DragActions.h"
     31 #include "DragImage.h"
     32 #include "IntPoint.h"
     33 
     34 #if PLATFORM(MAC)
     35 #ifdef __OBJC__
     36 @class DOMElement;
     37 @class NSURL;
     38 @class NSString;
     39 @class NSPasteboard;
     40 #else
     41 class DOMElement;
     42 class NSURL;
     43 class NSString;
     44 class NSPasteboard;
     45 #endif
     46 #endif
     47 
     48 namespace WebCore {
     49 
     50     class Clipboard;
     51     class DragData;
     52     class Frame;
     53     class Image;
     54     class HTMLImageElement;
     55 
     56     class DragClient {
     57     public:
     58         virtual void willPerformDragDestinationAction(DragDestinationAction, DragData*) = 0;
     59         virtual void willPerformDragSourceAction(DragSourceAction, const IntPoint&, Clipboard*) = 0;
     60         virtual DragDestinationAction actionMaskForDrag(DragData*) = 0;
     61         //We work in window rather than view coordinates here
     62         virtual DragSourceAction dragSourceActionMaskForPoint(const IntPoint& windowPoint) = 0;
     63 
     64         virtual void startDrag(DragImageRef dragImage, const IntPoint& dragImageOrigin, const IntPoint& eventPos, Clipboard*, Frame*, bool linkDrag = false) = 0;
     65 
     66         virtual void dragControllerDestroyed() = 0;
     67 #if PLATFORM(MAC)
     68         //Mac specific helper functions to allow access to functionality in webkit -- such as
     69         //web archives and NSPasteboard extras
     70         //not abstract as that would require another #if PLATFORM(MAC) for the SVGImage client empty impl
     71         virtual void declareAndWriteDragImage(NSPasteboard*, DOMElement*, NSURL*, NSString*, Frame*) {};
     72 #endif
     73 
     74         virtual ~DragClient() {};
     75     };
     76 
     77 }
     78 
     79 #endif // !DragClient_h
     80 
     81