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/**********************************************************************
** Copyright (C) 2000-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the Qt Assistant.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#ifndef DOCUPARSER_H
#define DOCUPARSER_H

#include <qxml.h>
#include <qptrlist.h>
#include <qmap.h>

class Profile;

struct ContentItem {
    ContentItem()
	: title( QString::null ), reference( QString::null ), depth( 0 ) {}
    ContentItem( const QString &t, const QString &r, int d )
	: title( t ), reference( r ), depth( d ) {}
    QString title;
    QString reference;
    int depth;
    Q_DUMMY_COMPARISON_OPERATOR(ContentItem)
};

QDataStream &operator>>( QDataStream &s, ContentItem &ci );
QDataStream &operator<<( QDataStream &s, const ContentItem &ci );

struct IndexItem {
    IndexItem( const QString &k, const QString &r )
	: keyword( k ), reference( r ) {}
    QString keyword;
    QString reference;
};



class DocuParser : public QXmlDefaultHandler
{
public:
    enum ParserVersion { Qt310, Qt320 };
    // Since We don't want problems with documentation
    // from version to version, this string stores the correct
    // version string to save documents.
    static const QString DocumentKey;

    static DocuParser *createParser( const QString &fileName );

    virtual bool parse( QFile *file );
    
    QValueList<ContentItem> getContentItems();
    QPtrList<IndexItem> getIndexItems();

    QString errorProtocol() const;
    QString contentsURL() const { return conURL; }

    virtual ParserVersion parserVersion() const = 0;
    virtual void addTo( Profile *p ) = 0;

    QString fileName() const { return fname; }
    void setFileName( const QString &file ) { fname = file; }

protected:
    QString absolutify( const QString &input ) const;
    
    QString contentRef, indexRef, errorProt, conURL;
    QString docTitle, title, iconName;
    QValueList<ContentItem> contentList;
    QPtrList<IndexItem> indexList;
    QString fname;
};


class DocuParser310 : public DocuParser
{
public:
    enum States{ StateInit, StateContent, StateSect, StateKeyword };
    
    bool startDocument();
    bool startElement( const QString&, const QString&, const QString& ,
                       const QXmlAttributes& );
    bool endElement( const QString&, const QString&, const QString& );
    bool characters( const QString & );
    bool fatalError( const QXmlParseException& exception );

    virtual ParserVersion parserVersion() const { return Qt310; }
    virtual void addTo( Profile *p );
    
private:
    States state;
    int depth;
};


class DocuParser320 : public DocuParser
{
public:
    enum States { StateInit, StateDocRoot, StateProfile, StateProperty,
		  StateContent, StateSect, StateKeyword };

    DocuParser320();    
    
    bool startDocument();
    bool startElement( const QString&, const QString&, const QString& ,
                       const QXmlAttributes& );
    bool endElement( const QString&, const QString&, const QString& );
    bool characters( const QString & );
    bool fatalError( const QXmlParseException& exception );

    virtual ParserVersion parserVersion() const { return Qt320; }
    virtual void addTo( Profile *p );
    Profile *profile() const { return prof; }    

private:
    
    States state;
    int depth;
    int docfileCounter;
    QString propertyValue;
    QString propertyName;
    Profile *prof;
};
#endif //DOCUPARSER_H