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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt Linguist of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef SIMTEXTH_H
#define SIMTEXTH_H

const int textSimilarityThreshold = 190;

#include <QString>
#include <QList>

QT_BEGIN_NAMESPACE

class Translator;

struct Candidate
{
    Candidate() {}
    Candidate(const QString& source0, const QString &target0)
	: source(source0), target(target0)
    {}

    QString source;
    QString target;
};

inline bool operator==( const Candidate& c, const Candidate& d ) {
    return c.target == d.target && c.source == d.source;
}
inline bool operator!=( const Candidate& c, const Candidate& d ) {
    return !operator==( c, d );
}

typedef QList<Candidate> CandidateList;

struct CoMatrix;
/**
 * This class is more efficient for searching through a large array of candidate strings, since we only
 * have to construct the CoMatrix for the \a stringToMatch once,
 * after that we just call getSimilarityScore(strCandidate).
 * \sa getSimilarityScore
 */
class StringSimilarityMatcher {
public:
    StringSimilarityMatcher(const QString &stringToMatch);
    ~StringSimilarityMatcher();
    int getSimilarityScore(const QString &strCandidate);

private:
    CoMatrix *m_cm;
    int m_length;
};

int getSimilarityScore(const QString &str1, const QString &str2);

CandidateList similarTextHeuristicCandidates( const Translator *tor,
					      const QString &text,
					      int maxCandidates );

QT_END_NAMESPACE

#endif