/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the Qt Assistant of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef INDEX_H+
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#define INDEX_H+
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+
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#include <QStringList>+
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#include <QHash>+
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#include <QDataStream>+
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#include <QObject>+
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#include <QList>+
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#include <QFile>+
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#include <QVector>+
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+
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QT_BEGIN_NAMESPACE+
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+
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struct Document {+
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    Document( int d, int f ) : docNumber( d ), frequency( f ) {}+
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    Document() : docNumber( -1 ), frequency( 0 ) {}+
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    bool operator==( const Document &doc ) const {+
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	return docNumber == doc.docNumber;+
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    }+
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    bool operator<( const Document &doc ) const {+
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	return frequency > doc.frequency;+
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    }+
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    bool operator<=( const Document &doc ) const {+
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	return frequency >= doc.frequency;+
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    }+
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    bool operator>( const Document &doc ) const {+
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	return frequency < doc.frequency;+
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    }+
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    qint16 docNumber;+
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    qint16 frequency;+
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};+
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+
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QDataStream &operator>>( QDataStream &s, Document &l );+
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QDataStream &operator<<( QDataStream &s, const Document &l );+
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+
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class Index : public QObject+
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{+
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    Q_OBJECT+
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public:+
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    struct Entry {+
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	    Entry( int d ) { documents.append( Document( d, 1 ) ); }+
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	    Entry( QVector<Document> l ) : documents( l ) {}+
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	    QVector<Document> documents;+
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    };+
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    struct PosEntry {+
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	    PosEntry( int p ) { positions.append( p ); }+
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	    QList<uint> positions;+
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    };+
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+
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    Index( const QString &dp, const QString &hp );+
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    Index( const QStringList &dl, const QString &hp );+
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    void writeDict();+
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    void readDict();+
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    int makeIndex();+
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    QStringList query( const QStringList&, const QStringList&, const QStringList& );+
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    QString getDocumentTitle( const QString& );+
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    void setDictionaryFile( const QString& );+
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    void setDocListFile( const QString& );+
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    void setDocList( const QStringList & );+
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+
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signals:+
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    void indexingProgress( int );+
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+
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private slots:+
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    void setLastWinClosed();+
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+
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private:+
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    void setupDocumentList();+
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    void parseDocument( const QString&, int );+
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    void insertInDict( const QString&, int );+
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    void writeDocumentList();+
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    void readDocumentList();+
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    QStringList getWildcardTerms( const QString& );+
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    QStringList split( const QString& );+
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    QVector<Document> setupDummyTerm( const QStringList& );+
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    bool searchForPattern( const QStringList&, const QStringList&, const QString& );+
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    void buildMiniDict( const QString& );+
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    QString getCharsetForDocument(QFile *);+
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    QStringList docList;+
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    QHash<QString, Entry*> dict;+
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    QHash<QString, PosEntry*> miniDict;+
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    uint wordNum;+
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    QString docPath;+
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    QString dictFile, docListFile;+
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    bool alreadyHaveDocList;+
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    bool lastWindowClosed;+
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    QHash<QString, QString> documentTitleCache;+
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};+
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+
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#endif+
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+
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QT_END_NAMESPACE+
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