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index.h

/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Assistant of the Qt Toolkit.
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** 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
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** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
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#ifndef INDEX_H
#define INDEX_H

#include <QStringList>
#include <QHash>
#include <QDataStream>
#include <QObject>
#include <QList>
#include <QFile>
#include <QVector>

struct Document {
    Document( int d, int f ) : docNumber( d ), frequency( f ) {}
    Document() : docNumber( -1 ), frequency( 0 ) {}
    bool operator==( const Document &doc ) const {
      return docNumber == doc.docNumber;
    }
    bool operator<( const Document &doc ) const {
      return frequency > doc.frequency;
    }
    bool operator<=( const Document &doc ) const {
      return frequency >= doc.frequency;
    }
    bool operator>( const Document &doc ) const {
      return frequency < doc.frequency;
    }
    qint16 docNumber;
    qint16 frequency;
};

QDataStream &operator>>( QDataStream &s, Document &l );
QDataStream &operator<<( QDataStream &s, const Document &l );

class Index : public QObject
{
    Q_OBJECT
public:
    struct Entry {
          Entry( int d ) { documents.append( Document( d, 1 ) ); }
          Entry( QVector<Document> l ) : documents( l ) {}
          QVector<Document> documents;
    };
    struct PosEntry {
          PosEntry( int p ) { positions.append( p ); }
          QList<uint> positions;
    };

    Index( const QString &dp, const QString &hp );
    Index( const QStringList &dl, const QString &hp );
    void writeDict();
    void readDict();
    int makeIndex();
    QStringList query( const QStringList&, const QStringList&, const QStringList& );
    QString getDocumentTitle( const QString& );
    void setDictionaryFile( const QString& );
    void setDocListFile( const QString& );
    void setDocList( const QStringList & );

signals:
    void indexingProgress( int );

private slots:
    void setLastWinClosed();

private:
    void setupDocumentList();
    void parseDocument( const QString&, int );
    void insertInDict( const QString&, int );
    void writeDocumentList();
    void readDocumentList();
    QStringList getWildcardTerms( const QString& );
    QStringList split( const QString& );
    QVector<Document> setupDummyTerm( const QStringList& );
    bool searchForPattern( const QStringList&, const QStringList&, const QString& );
    void buildMiniDict( const QString& );
    QString getCharsetForDocument(QFile *);
    QStringList docList;
    QHash<QString, Entry*> dict;
    QHash<QString, PosEntry*> miniDict;
    uint wordNum;
    QString docPath;
    QString dictFile, docListFile;
    bool alreadyHaveDocList;
    bool lastWindowClosed;
    QHash<QString, QString> documentTitleCache;
};

#endif

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