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 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 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
31#import "DataTransfer.h"
32#import "DragClient.h"
33#import "DragData.h"
34#import "Element.h"
35#import "FrameView.h"
36#import "MainFrame.h"
37#import "Page.h"
38#import "Pasteboard.h"
39
40namespace WebCore {
41
42const int DragController::LinkDragBorderInset = -2;
43
44const int DragController::MaxOriginalImageArea = 1500 * 1500;
45const int DragController::DragIconRightInset = 7;
46const int DragController::DragIconBottomInset = 3;
47
48const float DragController::DragImageAlpha = 0.75f;
49
50bool DragController::isCopyKeyDown(DragData& dragData)
51{
52    return dragData.flags() & DragApplicationIsCopyKeyDown;
53}
54
55DragOperation DragController::dragOperation(DragData& dragData)
56{
57    if ((dragData.flags() & DragApplicationIsModal) || !dragData.containsURL(&m_page.mainFrame()))
58        return DragOperationNone;
59
60    if (!m_documentUnderMouse || (!(dragData.flags() & (DragApplicationHasAttachedSheet | DragApplicationIsSource))))
61        return DragOperationCopy;
62
63    return DragOperationNone;
64}
65
66const IntSize& DragController::maxDragImageSize()
67{
68    static const IntSize maxDragImageSize(400, 400);
69
70    return maxDragImageSize;
71}
72
73void DragController::cleanupAfterSystemDrag()
74{
75    // Drag has ended, dragEnded *should* have been called, however it is possible
76    // for the UIDelegate to take over the drag, and fail to send the appropriate
77    // drag termination event.  As dragEnded just resets drag variables, we just
78    // call it anyway to be on the safe side.
79    // We don't want to do this for WebKit2, since the client call to start the drag
80    // is asynchronous.
81    if (m_page.mainFrame().view()->platformWidget())
82        dragEnded();
83}
84
85void DragController::declareAndWriteDragImage(DataTransfer& dataTransfer, Element& element, const URL& url, const String& label)
86{
87    m_client.declareAndWriteDragImage(dataTransfer.pasteboard().name(), element, url, label, element.document().frame());
88}
89
90} // namespace WebCore
91
92#endif // ENABLE(DRAG_SUPPORT)
93