/*

 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)

 *           (C) 2000 Antti Koivisto (koivisto@kde.org)

 *           (C) 2000 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.

 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)

 *

 * 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 ContentData_h

#define ContentData_h

#include "RenderStyleConstants.h"

#include <wtf/Noncopyable.h>

#include <wtf/PassRefPtr.h>

namespace WebCore {

class CounterContent;

class StringImpl;

class StyleImage;

struct ContentData : Noncopyable {

public:

    ContentData()

        : m_type(CONTENT_NONE)

        , m_next(0)

    {

    }

    ~ContentData()

    {

        clear();

    }

    void clear();

    bool isCounter() const { return m_type == CONTENT_COUNTER; }

    bool isImage() const { return m_type == CONTENT_OBJECT; }

    bool isNone() const { return m_type == CONTENT_NONE; }

    bool isText() const { return m_type == CONTENT_TEXT; }

    StyleContentType type() const { return m_type; }

    bool dataEquivalent(const ContentData&) const;

    StyleImage* image() const { return m_content.m_image; }

    void setImage(PassRefPtr<StyleImage> image)

    {

        deleteContent();

        m_type = CONTENT_OBJECT;

        m_content.m_image = image.releaseRef();

    }

    StringImpl* text() const { return m_content.m_text; }

    void setText(PassRefPtr<StringImpl> text)

    {

        deleteContent();

        m_type = CONTENT_TEXT;

        m_content.m_text = text.releaseRef();

    }

    CounterContent* counter() const { return m_content.m_counter; }

    void setCounter(CounterContent* counter)

    {

        deleteContent();

        m_type = CONTENT_COUNTER;

        m_content.m_counter = counter;

    }

    ContentData* next() const { return m_next; }

    void setNext(ContentData* next)

    {

        m_next = next;

    }

private:

    void deleteContent();

    StyleContentType m_type;

    union {

        StyleImage* m_image;

        StringImpl* m_text;

        CounterContent* m_counter;

    } m_content;

    ContentData* m_next;

};

} // namespace WebCore

#endif // ContentData_h