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** This file is part of the linguist application of the Qt Toolkit.
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** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
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** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#include <metatranslator.h>

#include <qmap.h>
#include <stdio.h>

typedef QMap<QByteArray, MetaTranslatorMessage> TMM;
typedef QList<MetaTranslatorMessage> TML;

/*
  Augments a MetaTranslator with trivially derived translations.

  For example, if "Enabled:" is consistendly translated as "Eingeschaltet:" no
  matter the context or the comment, "Eingeschaltet:" is added as the
  translation of any untranslated "Enabled:" text and is marked Unfinished.
*/

void applySameTextHeuristic( MetaTranslator *tor, bool verbose )
{
    TMM translated;
    TMM avoid;
    TMM::Iterator t;
    TML untranslated;
    TML::Iterator u;
    TML all = tor->messages();
    TML::Iterator it;
    int inserted = 0;

    for ( it = all.begin(); it != all.end(); ++it ) {
        if ( (*it).type() == MetaTranslatorMessage::Unfinished ) {
            if ( (*it).translation().isEmpty() )
                untranslated.append( *it );
        } else {
            QByteArray key = (*it).sourceText();
            t = translated.find( key );
            if ( t != translated.end() ) {
                /*
                  The same source text is translated at least two
                  different ways. Do nothing then.
                */
                if ( (*t).translation() != (*it).translation() ) {
                    translated.remove( key );
                    avoid.insert( key, *it );
                }
            } else if ( !avoid.contains(key) &&
                        !(*it).translation().isEmpty() ) {
                translated.insert( key, *it );
            }
        }
    }

    for ( u = untranslated.begin(); u != untranslated.end(); ++u ) {
        QByteArray key = (*u).sourceText();
        t = translated.find( key );
        if ( t != translated.end() ) {
            MetaTranslatorMessage m( *u );
            m.setTranslation( (*t).translation() );
            tor->insert( m );
            inserted++;
        }
    }
    if ( verbose && inserted != 0 )
        fprintf( stderr, " same-text heuristic provided %d translation%s\n",
                 inserted, inserted == 1 ? "" : "s" );
}
