dragcontrollerchromium.cpp

来自「linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自Web」· C++ 代码 · 共 78 行

/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 * Copyright (C) 2008 Google Inc.
 *
 * 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. 
 */

#include "config.h"
#include "DragController.h"

#include "DragData.h"
#include "SelectionController.h"
#include <wtf/RefPtr.h>

#if PLATFORM(WIN_OS)
#include <windows.h>
#endif

namespace WebCore {

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;

DragOperation DragController::dragOperation(DragData* dragData)
{
    // FIXME: To match the MacOS behaviour we should return DragOperationNone
    // if we are a modal window, we are the drag source, or the window is an
    // attached sheet If this can be determined from within WebCore
    // operationForDrag can be pulled into WebCore itself
    ASSERT(dragData);
    return dragData->containsURL() && !m_didInitiateDrag ? DragOperationCopy : DragOperationNone;
}

bool DragController::isCopyKeyDown()
{
    // FIXME: This should not be OS specific.  Delegate to the embedder instead.
#if PLATFORM(WIN_OS)
    return ::GetAsyncKeyState(VK_CONTROL);
#else
    return false;
#endif
}
    
const IntSize& DragController::maxDragImageSize()
{
    static const IntSize maxDragImageSize(200, 200);
    return maxDragImageSize;
}

void DragController::cleanupAfterSystemDrag()
{
}

} // namespace WebCore