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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#import "config.h"
27#import "DragController.h"
28
29#if ENABLE(DRAG_SUPPORT)
30#import "DragData.h"
31#import "Frame.h"
32#import "FrameView.h"
33#import "Page.h"
34
35namespace WebCore {
36
37const int DragController::LinkDragBorderInset = -2;
38
39const int DragController::MaxOriginalImageArea = 1500 * 1500;
40const int DragController::DragIconRightInset = 7;
41const int DragController::DragIconBottomInset = 3;
42
43const float DragController::DragImageAlpha = 0.75f;
44
45bool DragController::isCopyKeyDown(DragData* dragData)
46{
47    return dragData->flags() & DragApplicationIsCopyKeyDown;
48}
49
50DragOperation DragController::dragOperation(DragData* dragData)
51{
52    ASSERT(dragData);
53
54    if ((dragData->flags() & DragApplicationIsModal) || !dragData->containsURL(m_page->mainFrame()))
55        return DragOperationNone;
56
57    if (!m_documentUnderMouse || (!(dragData->flags() & (DragApplicationHasAttachedSheet | DragApplicationIsSource))))
58        return DragOperationCopy;
59
60    return DragOperationNone;
61}
62
63const IntSize& DragController::maxDragImageSize()
64{
65    static const IntSize maxDragImageSize(400, 400);
66
67    return maxDragImageSize;
68}
69
70void DragController::cleanupAfterSystemDrag()
71{
72    // Drag has ended, dragEnded *should* have been called, however it is possible
73    // for the UIDelegate to take over the drag, and fail to send the appropriate
74    // drag termination event.  As dragEnded just resets drag variables, we just
75    // call it anyway to be on the safe side.
76    // We don't want to do this for WebKit2, since the client call to start the drag
77    // is asynchronous.
78    if (m_page->mainFrame()->view()->platformWidget())
79        dragEnded();
80}
81
82} // namespace WebCore
83
84#endif // ENABLE(DRAG_SUPPORT)
85