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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#import "DragData.h"
30#import "Frame.h"
31#import "FrameView.h"
32#import "Page.h"
33
34namespace WebCore {
35
36const int DragController::LinkDragBorderInset = -2;
37
38const int DragController::MaxOriginalImageArea = 1500 * 1500;
39const int DragController::DragIconRightInset = 7;
40const int DragController::DragIconBottomInset = 3;
41
42const float DragController::DragImageAlpha = 0.75f;
43
44bool DragController::isCopyKeyDown()
45{
46    return [[NSApp currentEvent] modifierFlags] & NSAlternateKeyMask;
47}
48
49DragOperation DragController::dragOperation(DragData* dragData)
50{
51    ASSERT(dragData);
52    if ([NSApp modalWindow] || !dragData->containsURL())
53        return DragOperationNone;
54
55    if (!m_documentUnderMouse || ![[m_page->mainFrame()->view()->getOuterView() window] attachedSheet]
56        && [dragData->platformData() draggingSource] != m_page->mainFrame()->view()->getOuterView())
57        return DragOperationCopy;
58
59    return DragOperationNone;
60}
61
62const IntSize& DragController::maxDragImageSize()
63{
64    static const IntSize maxDragImageSize(400, 400);
65
66    return maxDragImageSize;
67}
68
69void DragController::cleanupAfterSystemDrag()
70{
71    // Drag has ended, dragEnded *should* have been called, however it is possible
72    // for the UIDelegate to take over the drag, and fail to send the appropriate
73    // drag termination event.  As dragEnded just resets drag variables, we just
74    // call it anyway to be on the safe side
75    dragEnded();
76}
77
78}
79