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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*
uncompressor.cpp
*/
#include "uncompressor.h"
QT_BEGIN_NAMESPACE
QList<Uncompressor *> Uncompressor::uncompressors;
/*!
\class Uncompressor
\brief The Uncompressor class is a base class for classes that
know how to uncompress a certain kind of compressed file.
The uncompressor contains a list of the filename extensions
of the file types that the uncompressor knows how to uncompress.
It maintains a static list of all the instances of Uncompressor
that have been created. It also has a static function for searching
that list to find the uncompressor to use for uncompressing a file
with a certain extension.
*/
/*!
The constructor takes a list of filename extensions, which it
copies and saves internally. This uncompressor is prepended
to the stack list.
*/
Uncompressor::Uncompressor( const QStringList& extensions )
: fileExts( extensions )
{
uncompressors.prepend( this );
}
/*!
The destructor deletes all the filename extensions.
*/
Uncompressor::~Uncompressor()
{
uncompressors.removeAll( this );
}
/*!
This function searches the static list of uncompressors to find the
first one that can handle \a fileName. If it finds an acceptable
uncompressor, it returns a pointer to it. Otherwise it returns null.
*/
Uncompressor*
Uncompressor::uncompressorForFileName( const QString& fileName )
{
int dot = -1;
while ( (dot = fileName.indexOf(".", dot + 1)) != -1 ) {
QString ext = fileName.mid( dot + 1 );
QList<Uncompressor *>::ConstIterator u = uncompressors.begin();
while ( u != uncompressors.end() ) {
if ( (*u)->fileExtensions().contains(ext) )
return *u;
++u;
}
}
return 0;
}
QT_END_NAMESPACE
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