/*

 * This file is part of the DOM implementation for KDE.

 *

 * Copyright (C) 2001 Peter Kelly (pmk@post.com)

 * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)

 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)

 * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 *

 */

#ifndef Clipboard_h

#define Clipboard_h

#include <wtf/HashSet.h>

#include "AtomicString.h"

#include "ClipboardAccessPolicy.h"

#include "DragActions.h"

#include "DragImage.h"

#include "IntPoint.h"

#include "Node.h"

#include "Shared.h"

namespace WebCore {

    class CachedImage;

    class Element;

    class Frame;

    class Image;

    class KURL;

    class Range;

    class String;

    // State available during IE's events for drag and drop and copy/paste

    class Clipboard : public Shared<Clipboard> {

    public:

        Clipboard(ClipboardAccessPolicy policy, bool isForDragging);

        virtual ~Clipboard() { }

        // Is this operation a drag-drop or a copy-paste?

        bool isForDragging() const { return m_forDragging; }

        String dropEffect() const { return m_dropEffect; }

        void setDropEffect(const String&);

        String effectAllowed() const { return m_effectAllowed; }

        void setEffectAllowed(const String&);

        virtual void clearData(const String& type) = 0;

        virtual void clearAllData() = 0;

        virtual String getData(const String& type, bool& success) const = 0;

        virtual bool setData(const String& type, const String& data) = 0;

        // extensions beyond IE's API

        virtual HashSet<String> types() const = 0;

        IntPoint dragLocation() const { return m_dragLoc; }

        CachedImage* dragImage() const { return m_dragImage; }

        virtual void setDragImage(CachedImage*, const IntPoint&) = 0;

        Node* dragImageElement() { return m_dragImageElement.get(); }

        virtual void setDragImageElement(Node*, const IntPoint&) = 0;

        //Provides the DOM specified 

        virtual DragImageRef createDragImage(IntPoint& dragLoc) const = 0;

        virtual void declareAndWriteDragImage(Element*, const KURL&, const String& title, Frame*) = 0;

        virtual void writeURL(const KURL&, const String&, Frame*) = 0;

        virtual void writeRange(Range*, Frame*) = 0;

        virtual bool hasData() = 0;

        void setAccessPolicy(ClipboardAccessPolicy);

        bool sourceOperation(DragOperation&) const;

        bool destinationOperation(DragOperation&) const;

        void setSourceOperation(DragOperation);

        void setDestinationOperation(DragOperation);

        void setDragHasStarted() { m_dragStarted = true; }

    protected:

        ClipboardAccessPolicy policy() const { return m_policy; }

        bool dragStarted() const { return m_dragStarted; }

    private:

        ClipboardAccessPolicy m_policy;

        String m_dropEffect;

        String m_effectAllowed;

        bool m_dragStarted;

    protected:

        bool m_forDragging;

        IntPoint m_dragLoc;

        CachedImage* m_dragImage;

        RefPtr<Node> m_dragImageElement;

    };

} // namespace WebCore

#endif // Clipboard_h