/*

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

 *

 * Copyright (C) 2000 Peter Kelly (pmk@post.com)

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

 * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)

 *

 * 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 Tokenizer_h

#define Tokenizer_h

namespace WebCore {

    class SegmentedString;

    class Tokenizer {

    public:

        Tokenizer(bool viewSourceMode = false) 

            : m_parserStopped(false)

            , m_inViewSourceMode(viewSourceMode)

        {

        }

        virtual ~Tokenizer() { }

        // Script output must be prepended, while new data

        // received during executing a script must be appended, hence the

        // extra bool to be able to distinguish between both cases.

        // document.write() always uses false, while the loader uses true.

        virtual bool write(const SegmentedString&, bool appendData) = 0;

        virtual void finish() = 0;

        virtual bool isWaitingForScripts() const = 0;

        virtual void stopParsing() { m_parserStopped = true; }

        virtual bool processingData() const { return false; }

        virtual int executingScript() const { return 0; }

        virtual bool wantsRawData() const { return false; }

        virtual bool writeRawData(const char* data, int len) { return false; }

        bool inViewSourceMode() const { return m_inViewSourceMode; }

        void setInViewSourceMode(bool mode) { m_inViewSourceMode = mode; }

        virtual bool wellFormed() const { return true; }

        virtual int lineNumber() const { return -1; }

        virtual int columnNumber() const { return -1; }

        virtual void executeScriptsWaitingForStylesheets() {}

        virtual bool isHTMLTokenizer() const { return false; }

    protected:

        // The tokenizer has buffers, so parsing may continue even after

        // it stops receiving data. We use m_parserStopped to stop the tokenizer

        // even when it has buffered data.

        bool m_parserStopped;

        bool m_inViewSourceMode;

    };

} // namespace WebCore

#endif // Tokenizer_h