DragControllerMac.mm 2.82 KB
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/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#import "config.h"
#import "DragController.h"

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#if ENABLE(DRAG_SUPPORT)
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#import "DragData.h"
#import "Frame.h"
#import "FrameView.h"
#import "Page.h"

namespace WebCore {

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const int DragController::LinkDragBorderInset = -2;

const int DragController::MaxOriginalImageArea = 1500 * 1500;
const int DragController::DragIconRightInset = 7;
const int DragController::DragIconBottomInset = 3;

const float DragController::DragImageAlpha = 0.75f;

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bool DragController::isCopyKeyDown(DragData* dragData)
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{
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    return dragData->flags() & DragApplicationIsCopyKeyDown;
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}
    
DragOperation DragController::dragOperation(DragData* dragData)
{
    ASSERT(dragData);
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    if ((dragData->flags() & DragApplicationIsModal) || !dragData->containsURL(m_page->mainFrame()))
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        return DragOperationNone;
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    if (!m_documentUnderMouse || (!(dragData->flags() & (DragApplicationHasAttachedSheet | DragApplicationIsSource))))
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        return DragOperationCopy;
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    return DragOperationNone;
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}

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const IntSize& DragController::maxDragImageSize()
{
    static const IntSize maxDragImageSize(400, 400);
    
    return maxDragImageSize;
}

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void DragController::cleanupAfterSystemDrag()
{
    // Drag has ended, dragEnded *should* have been called, however it is possible
    // for the UIDelegate to take over the drag, and fail to send the appropriate
    // drag termination event.  As dragEnded just resets drag variables, we just
    // call it anyway to be on the safe side
    dragEnded();
}

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} // namespace WebCore

#endif // ENABLE(DRAG_SUPPORT)