clipboardwin.h

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WebKit

/*
 * Copyright (C) 2006, 2007, 2008 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. 
 */

#ifndef ClipboardWin_h
#define ClipboardWin_h

#include "CachedResourceClient.h"
#include "Clipboard.h"
#include "COMPtr.h"

struct IDataObject;

namespace WebCore {

    class CachedImage;
    class IntPoint;
    class WCDataObject;

    // State available during IE's events for drag and drop and copy/paste
    class ClipboardWin : public Clipboard, public CachedResourceClient {
    public:
        static PassRefPtr<ClipboardWin> create(bool isForDragging, IDataObject* dataObject, ClipboardAccessPolicy policy)
        {
            return adoptRef(new ClipboardWin(isForDragging, dataObject, policy));
        }
        static PassRefPtr<ClipboardWin> create(bool isForDragging, WCDataObject* dataObject, ClipboardAccessPolicy policy)
        {
            return adoptRef(new ClipboardWin(isForDragging, dataObject, policy));
        }
        ~ClipboardWin();
    
        void clearData(const String& type);
        void clearAllData();
        String getData(const String& type, bool& success) const;
        bool setData(const String& type, const String& data);
    
        // extensions beyond IE's API
        HashSet<String> types() const;
    
        void setDragImage(CachedImage*, const IntPoint&);
        void setDragImageElement(Node*, const IntPoint&);

        virtual DragImageRef createDragImage(IntPoint& dragLoc) const;
        virtual void declareAndWriteDragImage(Element*, const KURL&, const String& title, Frame*);
        virtual void writeURL(const KURL&, const String&, Frame*);
        virtual void writeRange(Range*, Frame*);

        virtual bool hasData();

        COMPtr<IDataObject> dataObject() { return m_dataObject; }

    private:
        ClipboardWin(bool isForDragging, IDataObject*, ClipboardAccessPolicy);
        ClipboardWin(bool isForDragging, WCDataObject*, ClipboardAccessPolicy);

        void resetFromClipboard();
        void setDragImage(CachedImage*, Node*, const IntPoint&);

        COMPtr<IDataObject> m_dataObject;
        COMPtr<WCDataObject> m_writableDataObject;
        Frame* m_frame;
    };

} // namespace WebCore

#endif // ClipboardWin_h