/**********************************************************************
**   Copyright (C) 2000 Trolltech AS.  All rights reserved.
**
**   proparser.cpp
**
**   This file is part of Qt Linguist.
**
**   See the file LICENSE included in the distribution for the usage
**   and distribution terms.
**
**   The file is provided AS IS with NO WARRANTY OF ANY KIND,
**   INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR
**   A PARTICULAR PURPOSE.
**
**********************************************************************/

#include <qregexp.h>
#include <qstringlist.h>

#include "proparser.h"

QMap<QString, QString> proFileTagMap( const QString& text )
{
    QString t = text;

    /*
      Strip comments, merge lines ending with backslash, add
      spaces around '=' and '+=', replace '\n' with ';', and
      simplify white spaces.
    */
    t.replace( QRegExp(QString("#[^\n]$")), QString(" ") );
    t.replace( QRegExp(QString("\\\\\\s*\n")), QString(" ") );
    t.replace( QRegExp(QString("=")), QString(" = ") );
    t.replace( QRegExp(QString("\\+ =")), QString(" += ") );
    t.replace( QRegExp(QString("\n")), QString(";") );
    t = t.simplifyWhiteSpace();

    QMap<QString, QString> tagMap;

    QStringList lines = QStringList::split( QChar(';'), t );
    QStringList::Iterator line;
    for ( line = lines.begin(); line != lines.end(); ++line ) {
        QStringList toks = QStringList::split( QChar(' '), *line );

        if ( toks.count() >= 3 && 
             (toks[1] == QString("=") || toks[1] == QString("+=")) ) {
            QString tag = toks.first();
            int k = tag.findRev( QChar(':') ); // as in 'unix:'
            if ( k != -1 )
                tag = tag.mid( k + 1 );
            toks.remove( toks.begin() );

            QString action = toks.first();
            toks.remove( toks.begin() );

            if ( tagMap.contains(tag) ) {
                if ( action == QString("=") )
                    tagMap.replace( tag, toks.join(QChar(' ')) );
                else
                    tagMap[tag] += QChar( ' ' ) + toks.join( QChar(' ') );
            } else {
                tagMap[tag] = toks.join( QChar(' ') );
            }
        }
    }

    QRegExp var( "\\$\\$[a-zA-Z0-9_]+" );
    QMap<QString, QString>::Iterator it;
    for ( it = tagMap.begin(); it != tagMap.end(); ++it ) {
        int i = 0;

        while ( (i = var.search(it.data(), i)) != -1 ) {
            int len = var.matchedLength();
            (*it).replace( i, len, tagMap[(*it).mid(i + 2, len - 2)] );
        }
    }
    return tagMap;
}