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)
35OBJC_CLASS DOMElement;
36OBJC_CLASS NSURL;
37OBJC_CLASS NSString;
38#endif
39
40namespace WebCore {
41
42    class Clipboard;
43    class DragData;
44    class Frame;
45    class Image;
46    class HTMLImageElement;
47
48    class DragClient {
49    public:
50        virtual void willPerformDragDestinationAction(DragDestinationAction, DragData*) = 0;
51        virtual void willPerformDragSourceAction(DragSourceAction, const IntPoint&, Clipboard*) = 0;
52        virtual DragDestinationAction actionMaskForDrag(DragData*) = 0;
53
54        virtual DragSourceAction dragSourceActionMaskForPoint(const IntPoint& rootViewPoint) = 0;
55
56        virtual void startDrag(DragImageRef dragImage, const IntPoint& dragImageOrigin, const IntPoint& eventPos, Clipboard*, Frame*, bool linkDrag = false) = 0;
57
58        virtual void dragControllerDestroyed() = 0;
59
60#if PLATFORM(MAC)
61        // Mac-specific helper function to allow access to web archives and NSPasteboard extras in WebKit.
62        // This is not abstract as that would require another #if PLATFORM(MAC) for the SVGImage client empty implentation.
63        virtual void declareAndWriteDragImage(const String&, DOMElement*, NSURL *, NSString *, Frame*) { }
64#endif
65
66        virtual void dragEnded() { }
67
68        virtual ~DragClient() { }
69    };
70
71}
72
73#endif // !DragClient_h
74
75