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
41class DOMElement;
42class NSURL;
43class NSString;
44class NSPasteboard;
45#endif
46#endif
47
48namespace 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