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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the tools applications of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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29 ** Nokia at qt-info@nokia.com. |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 /* |
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43 uncompressor.cpp |
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44 */ |
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45 |
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46 #include "uncompressor.h" |
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47 |
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48 QT_BEGIN_NAMESPACE |
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49 |
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50 QList<Uncompressor *> Uncompressor::uncompressors; |
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51 |
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52 |
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53 /*! |
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54 \class Uncompressor |
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55 |
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56 \brief The Uncompressor class is a base class for classes that |
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57 know how to uncompress a certain kind of compressed file. |
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58 |
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59 The uncompressor contains a list of the filename extensions |
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60 of the file types that the uncompressor knows how to uncompress. |
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61 |
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62 It maintains a static list of all the instances of Uncompressor |
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63 that have been created. It also has a static function for searching |
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64 that list to find the uncompressor to use for uncompressing a file |
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65 with a certain extension. |
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66 */ |
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67 |
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68 /*! |
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69 The constructor takes a list of filename extensions, which it |
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70 copies and saves internally. This uncompressor is prepended |
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71 to the stack list. |
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72 */ |
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73 Uncompressor::Uncompressor( const QStringList& extensions ) |
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74 : fileExts( extensions ) |
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75 { |
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76 uncompressors.prepend( this ); |
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77 } |
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78 |
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79 /*! |
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80 The destructor deletes all the filename extensions. |
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81 */ |
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82 Uncompressor::~Uncompressor() |
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83 { |
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84 uncompressors.removeAll( this ); |
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85 } |
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86 |
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87 /*! |
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88 This function searches the static list of uncompressors to find the |
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89 first one that can handle \a fileName. If it finds an acceptable |
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90 uncompressor, it returns a pointer to it. Otherwise it returns null. |
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91 */ |
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92 Uncompressor* |
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93 Uncompressor::uncompressorForFileName( const QString& fileName ) |
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94 { |
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95 int dot = -1; |
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96 while ( (dot = fileName.indexOf(".", dot + 1)) != -1 ) { |
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97 QString ext = fileName.mid( dot + 1 ); |
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98 QList<Uncompressor *>::ConstIterator u = uncompressors.begin(); |
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99 while ( u != uncompressors.end() ) { |
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100 if ( (*u)->fileExtensions().contains(ext) ) |
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101 return *u; |
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102 ++u; |
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103 } |
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104 } |
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105 return 0; |
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106 } |
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107 |
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108 QT_END_NAMESPACE |