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**+
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** Copyright (C) 2009 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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** This file is part of the tools applications of the Qt Toolkit.+
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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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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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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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** In addition, as a special exception, Nokia gives you certain additional+
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** $QT_END_LICENSE$+
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****************************************************************************/+
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+
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/*+
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  uncompressor.cpp+
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*/+
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+
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#include "uncompressor.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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QList<Uncompressor *> Uncompressor::uncompressors;+
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+
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+
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/*!+
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  \class Uncompressor+
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  +
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  \brief The Uncompressor class is a base class for classes that+
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  know how to uncompress a certain kind of compressed file.+
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+
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  The uncompressor contains a list of the filename extensions+
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  of the file types that the uncompressor knows how to uncompress.+
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+
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  It maintains a static list of all the instances of Uncompressor+
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  that have been created. It also has a static function for searching+
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  that list to find the uncompressor to use for uncompressing a file+
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  with a certain extension.+
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 */+
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+
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/*!+
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  The constructor takes a list of filename extensions, which it+
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  copies and saves internally. This uncompressor is prepended+
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  to the stack list.+
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 */+
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Uncompressor::Uncompressor( const QStringList& extensions )+
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    : fileExts( extensions )+
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{+
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    uncompressors.prepend( this );+
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}+
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+
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/*!+
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  The destructor deletes all the filename extensions.+
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 */+
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Uncompressor::~Uncompressor()+
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{+
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    uncompressors.removeAll( this );+
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}+
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+
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/*!+
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  This function searches the static list of uncompressors to find the+
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  first one that can handle \a fileName. If it finds an acceptable+
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  uncompressor, it returns a pointer to it. Otherwise it returns null.+
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*/+
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Uncompressor*+
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Uncompressor::uncompressorForFileName( const QString& fileName )+
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{+
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    int dot = -1;+
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    while ( (dot = fileName.indexOf(".", dot + 1)) != -1 ) {+
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        QString ext = fileName.mid( dot + 1 );+
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        QList<Uncompressor *>::ConstIterator u = uncompressors.begin();+
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        while ( u != uncompressors.end() ) {+
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            if ( (*u)->fileExtensions().contains(ext) )+
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                return *u;+
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            ++u;+
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        }+
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    }+
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    return 0;+
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}+
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+
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QT_END_NAMESPACE+
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