/*

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

 *

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

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

 * Copyright (C) 2003 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 CharacterData_h

#define CharacterData_h

#include "EventTargetNode.h"

namespace WebCore {

class CharacterData : public EventTargetNode {

public:

    CharacterData(Document*, const String& text);

    CharacterData(Document*);

    virtual ~CharacterData();

    // DOM methods & attributes for CharacterData

    String data() const { return str; }

    void setData(const String&, ExceptionCode&);

    unsigned length() const { return str->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 &arg, ExceptionCode&);

    bool containsOnlyWhitespace() const;

    bool containsOnlyWhitespace(unsigned from, unsigned len) const;

    // DOM methods overridden from  parent classes

    virtual String nodeValue() const;

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

    virtual bool isCharacterDataNode() const { return true; }

    // Other methods (not part of DOM)

    StringImpl* string() { return str; }

    virtual void checkCharDataOperation(unsigned offset, ExceptionCode&);

    virtual int maxOffset() const;

    virtual int caretMinOffset() const;

    virtual int caretMaxOffset() const;

    virtual unsigned caretMaxRenderedOffset() const;

    virtual bool offsetInCharacters() const;

    virtual bool rendererIsNeeded(RenderStyle*);

#ifndef NDEBUG

    virtual void dump(TextStream*, DeprecatedString ind = "") const;

#endif

protected:

    // note: since DOMStrings are shared, str should always be copied when making

    // a change or returning a string

    StringImpl* str;

    void dispatchModifiedEvent(StringImpl* prevValue);

};

} // namespace WebCore

#endif // CharacterData_h