/*

 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)

 *           (C) 1999 Antti Koivisto (koivisto@kde.org)

 * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.

 *

 * 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 CharacterData_h

#define CharacterData_h

#include "Node.h"

namespace WebCore {

class CharacterData : public Node {

public:

    String data() const { return m_data; }

    void setData(const String&, ExceptionCode&);

    unsigned length() const { return m_data->length(); }

    String substringData(unsigned offset, unsigned count, ExceptionCode&);

    void appendData(const String&, ExceptionCode&);

    void insertData(unsigned offset, const String&, ExceptionCode&);

    void deleteData(unsigned offset, unsigned count, ExceptionCode&);

    void replaceData(unsigned offset, unsigned count, const String&, ExceptionCode&);

    bool containsOnlyWhitespace() const;

    StringImpl* dataImpl() { return m_data.get(); }

    // Like appendData, but optimized for the parser (e.g., no mutation events).

    void parserAppendData(const String&);

protected:

    CharacterData(Document* document, const String& text, ConstructionType type)

        : Node(document, type)

        , m_data(text.impl() ? text.impl() : StringImpl::empty())

    {

        ASSERT(type == CreateComment || type == CreateText);

    }

    virtual bool rendererIsNeeded(RenderStyle*);

    void setDataImpl(PassRefPtr<StringImpl> impl) { m_data = impl; }

    void dispatchModifiedEvent(StringImpl* oldValue);

private:

    virtual String nodeValue() const;

    virtual void setNodeValue(const String&, ExceptionCode&);

    virtual bool isCharacterDataNode() const { return true; }

    virtual int maxCharacterOffset() const;

    virtual bool offsetInCharacters() const;

    void checkCharDataOperation(unsigned offset, ExceptionCode&);

    PassRefPtr<StringImpl> appendDataCommon(const String&);

    RefPtr<StringImpl> m_data;

};

} // namespace WebCore

#endif // CharacterData_h