1 | /* |
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2 | |
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3 | Copyright 2012-2013, 2015 Adam Reichold |
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4 | |
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5 | This file is part of qpdfview. |
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6 | |
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7 | qpdfview is free software: you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation, either version 2 of the License, or |
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10 | (at your option) any later version. |
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11 | |
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12 | qpdfview is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |
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17 | You should have received a copy of the GNU General Public License |
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18 | along with qpdfview. If not, see <http://www.gnu.org/licenses/>. |
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19 | |
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20 | */ |
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21 | |
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22 | #include "pluginhandler.h" |
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23 | |
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24 | #include <QApplication> |
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25 | #include <QDebug> |
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26 | #include <QDir> |
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27 | #include <QFileInfo> |
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28 | #include <QImageReader> |
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29 | #include <QMessageBox> |
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30 | #include <QPluginLoader> |
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31 | |
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32 | #if QT_VERSION >= QT_VERSION_CHECK(5,0,0) |
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33 | |
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34 | #include <QMimeDatabase> |
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35 | |
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36 | #endif // QT_VERSION |
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37 | |
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38 | #ifdef WITH_MAGIC |
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39 | |
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40 | #include <magic.h> |
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41 | |
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42 | #endif // WITH_MAGIC |
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43 | |
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44 | #include "model.h" |
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45 | |
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46 | namespace |
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47 | { |
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48 | |
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49 | using namespace qpdfview; |
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50 | |
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51 | Plugin* loadStaticPlugin(const QString& objectName) |
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52 | { |
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53 | foreach(QObject* object, QPluginLoader::staticInstances()) |
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54 | { |
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55 | if(object->objectName() == objectName) |
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56 | { |
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57 | Plugin* plugin = qobject_cast< Plugin* >(object); |
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58 | |
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59 | if(plugin != 0) |
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60 | { |
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61 | return plugin; |
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62 | } |
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63 | } |
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64 | } |
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65 | |
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66 | qCritical() << "Could not load static plug-in:" << objectName; |
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67 | |
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68 | return 0; |
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69 | } |
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70 | |
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71 | Plugin* loadPlugin(const QString& fileName) |
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72 | { |
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73 | QPluginLoader pluginLoader(QDir(QApplication::applicationDirPath()).absoluteFilePath(fileName)); |
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74 | |
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75 | if(!pluginLoader.load()) |
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76 | { |
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77 | const QString firstFileName = pluginLoader.fileName(); |
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78 | const QString firstErrorString = pluginLoader.errorString(); |
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79 | |
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80 | pluginLoader.setFileName(QDir(PLUGIN_INSTALL_PATH).absoluteFilePath(fileName)); |
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81 | |
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82 | if(!pluginLoader.load()) |
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83 | { |
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84 | qCritical() << "Could not load plug-in in first attempt:" << firstFileName; |
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85 | qCritical() << firstErrorString; |
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86 | |
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87 | qCritical() << "Could not load plug-in in second attempt:" << pluginLoader.fileName(); |
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88 | qCritical() << pluginLoader.errorString(); |
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89 | |
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90 | return 0; |
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91 | } |
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92 | } |
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93 | |
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94 | Plugin* plugin = qobject_cast< Plugin* >(pluginLoader.instance()); |
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95 | |
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96 | if(plugin == 0) |
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97 | { |
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98 | qCritical() << "Could not instantiate plug-in:" << pluginLoader.fileName(); |
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99 | qCritical() << pluginLoader.errorString(); |
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100 | } |
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101 | |
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102 | return plugin; |
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103 | } |
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104 | |
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105 | #if QT_VERSION >= QT_VERSION_CHECK(5,0,0) |
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106 | |
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107 | bool isSupportedImageFormat(const QMimeType& mimeType) |
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108 | { |
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109 | const QByteArray name = mimeType.name().toLocal8Bit(); |
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110 | |
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111 | return QImageReader::supportedMimeTypes().contains(name); |
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112 | } |
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113 | |
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114 | #else |
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115 | |
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116 | bool isSupportedImageFormat(const QString& fileName) |
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117 | { |
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118 | return !QImageReader::imageFormat(fileName).isEmpty(); |
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119 | } |
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120 | |
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121 | #endif // QT_VERSION |
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122 | |
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123 | QStringList supportedImageFormats() |
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124 | { |
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125 | QStringList formats; |
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126 | |
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127 | foreach(const QByteArray& format, QImageReader::supportedImageFormats()) |
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128 | { |
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129 | const QString name = QString::fromLocal8Bit(format); |
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130 | |
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131 | formats.append(QLatin1String("*.") + name); |
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132 | } |
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133 | |
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134 | return formats; |
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135 | } |
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136 | |
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137 | const char* const pdfMimeType = "application/pdf"; |
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138 | const char* const psMimeType = "application/postscript"; |
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139 | const char* const djvuMimeType = "image/vnd.djvu"; |
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140 | |
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141 | PluginHandler::FileType matchFileType(const QString& filePath) |
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142 | { |
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143 | PluginHandler::FileType fileType = PluginHandler::Unknown; |
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144 | |
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145 | #if QT_VERSION >= QT_VERSION_CHECK(5,0,0) |
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146 | |
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147 | const QMimeType mimeType = QMimeDatabase().mimeTypeForFile(filePath, QMimeDatabase::MatchContent); |
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148 | |
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149 | if(mimeType.inherits(pdfMimeType)) |
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150 | { |
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151 | fileType = PluginHandler::PDF; |
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152 | } |
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153 | else if(mimeType.inherits(psMimeType)) |
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154 | { |
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155 | fileType = PluginHandler::PS; |
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156 | } |
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157 | else if(mimeType.inherits(djvuMimeType)) |
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158 | { |
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159 | fileType = PluginHandler::DjVu; |
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160 | } |
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161 | else if(isSupportedImageFormat(mimeType)) |
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162 | { |
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163 | fileType = PluginHandler::Image; |
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164 | } |
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165 | else |
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166 | { |
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167 | qDebug() << "Unknown MIME type:" << mimeType.name(); |
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168 | } |
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169 | |
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170 | #else |
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171 | |
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172 | #ifdef WITH_MAGIC |
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173 | |
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174 | magic_t cookie = magic_open(MAGIC_MIME_TYPE | MAGIC_SYMLINK); |
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175 | |
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176 | if(magic_load(cookie, 0) == 0) |
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177 | { |
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178 | const char* mimeType = magic_file(cookie, QFile::encodeName(filePath)); |
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179 | |
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180 | if(qstrncmp(mimeType, pdfMimeType, qstrlen(pdfMimeType)) == 0) |
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181 | { |
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182 | fileType = PluginHandler::PDF; |
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183 | } |
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184 | else if(qstrncmp(mimeType, psMimeType, qstrlen(psMimeType)) == 0) |
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185 | { |
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186 | fileType = PluginHandler::PS; |
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187 | } |
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188 | else if(qstrncmp(mimeType, djvuMimeType, qstrlen(djvuMimeType)) == 0) |
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189 | { |
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190 | fileType = PluginHandler::DjVu; |
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191 | } |
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192 | else if(isSupportedImageFormat(filePath)) |
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193 | { |
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194 | fileType = PluginHandler::Image; |
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195 | } |
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196 | else |
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197 | { |
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198 | qDebug() << "Unknown MIME type:" << mimeType; |
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199 | } |
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200 | } |
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201 | |
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202 | magic_close(cookie); |
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203 | |
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204 | #else |
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205 | |
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206 | const QString suffix = QFileInfo(filePath).suffix().toLower(); |
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207 | |
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208 | if(suffix == QLatin1String("pdf")) |
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209 | { |
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210 | fileType = PluginHandler::PDF; |
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211 | } |
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212 | else if(suffix == QLatin1String("ps") || suffix == QLatin1String("eps")) |
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213 | { |
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214 | fileType = PluginHandler::PS; |
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215 | } |
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216 | else if(suffix == QLatin1String("djvu") || suffix == QLatin1String("djv")) |
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217 | { |
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218 | fileType = PluginHandler::DjVu; |
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219 | } |
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220 | else if(isSupportedImageFormat(filePath)) |
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221 | { |
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222 | fileType = PluginHandler::Image; |
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223 | } |
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224 | else |
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225 | { |
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226 | qDebug() << "Unkown file suffix:" << suffix; |
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227 | } |
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228 | |
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229 | #endif // WITH_MAGIC |
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230 | |
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231 | #endif // QT_VERSION |
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232 | |
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233 | return fileType; |
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234 | } |
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235 | |
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236 | } // anonymous |
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237 | |
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238 | namespace qpdfview |
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239 | { |
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240 | |
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241 | PluginHandler* PluginHandler::s_instance = 0; |
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242 | |
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243 | PluginHandler* PluginHandler::instance() |
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244 | { |
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245 | if(s_instance == 0) |
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246 | { |
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247 | s_instance = new PluginHandler(qApp); |
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248 | } |
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249 | |
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250 | return s_instance; |
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251 | } |
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252 | |
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253 | PluginHandler::~PluginHandler() |
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254 | { |
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255 | s_instance = 0; |
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256 | } |
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257 | |
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258 | QString PluginHandler::fileTypeName(PluginHandler::FileType fileType) |
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259 | { |
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260 | switch(fileType) |
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261 | { |
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262 | default: |
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263 | case PluginHandler::Unknown: |
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264 | return QLatin1String("Unknown"); |
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265 | case PluginHandler::PDF: |
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266 | return QLatin1String("PDF"); |
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267 | case PluginHandler::PS: |
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268 | return QLatin1String("PS"); |
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269 | case PluginHandler::DjVu: |
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270 | return QLatin1String("DjVu"); |
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271 | case PluginHandler::Image: |
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272 | return QLatin1String("Image"); |
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273 | } |
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274 | } |
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275 | |
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276 | QStringList PluginHandler::openFilter() |
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277 | { |
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278 | QStringList openFilter; |
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279 | QStringList supportedFormats; |
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280 | |
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281 | #if defined(WITH_PDF) || defined(WITH_FITZ) |
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282 | |
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283 | openFilter.append(QLatin1String("Portable document format (*.pdf)")); |
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284 | supportedFormats.append(QLatin1String("*.pdf")); |
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285 | |
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286 | #endif // WITH_PDF // WITH_FITZ |
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287 | |
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288 | #ifdef WITH_PS |
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289 | |
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290 | openFilter.append(QLatin1String("PostScript (*.ps)")); |
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291 | openFilter.append(QLatin1String("Encapsulated PostScript (*.eps)")); |
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292 | supportedFormats.append(QLatin1String("*.ps *.eps")); |
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293 | |
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294 | #endif // WITH_PS |
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295 | |
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296 | #ifdef WITH_DJVU |
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297 | |
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298 | openFilter.append(QLatin1String("DjVu (*.djvu *.djv)")); |
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299 | supportedFormats.append(QLatin1String("*.djvu *.djv")); |
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300 | |
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301 | #endif // WITH_DJVU |
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302 | |
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303 | #ifdef WITH_IMAGE |
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304 | |
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305 | const QStringList imageFormats = supportedImageFormats(); |
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306 | |
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307 | openFilter.append(tr("Image (%1)").arg(imageFormats.join(QLatin1String(" ")))); |
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308 | supportedFormats.append(imageFormats); |
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309 | |
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310 | #endif // WITH_IMAGE |
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311 | |
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312 | openFilter.prepend(tr("Supported formats (%1)").arg(supportedFormats.join(QLatin1String(" ")))); |
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313 | |
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314 | return openFilter; |
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315 | } |
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316 | |
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317 | Model::Document* PluginHandler::loadDocument(const QString& filePath) |
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318 | { |
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319 | const FileType fileType = matchFileType(filePath); |
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320 | |
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321 | if(fileType == Unknown) |
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322 | { |
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323 | qWarning() << tr("Could not match file type of '%1'!").arg(filePath); |
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324 | |
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325 | return 0; |
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326 | } |
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327 | |
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328 | if(!loadPlugin(fileType)) |
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329 | { |
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330 | QMessageBox::critical(0, tr("Critical"), tr("Could not load plug-in for file type '%1'!").arg(fileTypeName(fileType))); |
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331 | |
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332 | return 0; |
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333 | } |
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334 | |
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335 | return m_plugins.value(fileType)->loadDocument(filePath); |
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336 | } |
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337 | |
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338 | SettingsWidget* PluginHandler::createSettingsWidget(FileType fileType, QWidget* parent) |
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339 | { |
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340 | return loadPlugin(fileType) ? m_plugins.value(fileType)->createSettingsWidget(parent) : 0; |
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341 | } |
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342 | |
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343 | PluginHandler::PluginHandler(QObject* parent) : QObject(parent), |
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344 | m_plugins() |
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345 | { |
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346 | #ifdef WITH_IMAGE |
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347 | #ifdef STATIC_IMAGE_PLUGIN |
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348 | m_objectNames.insertMulti(Image, QLatin1String("ImagePlugin")); |
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349 | #else |
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350 | m_fileNames.insertMulti(Image, QLatin1String(IMAGE_PLUGIN_NAME)); |
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351 | #endif // STATIC_IMAGE_PLUGIN |
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352 | #endif // WITH_IMAGE |
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353 | |
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354 | #ifdef WITH_FITZ |
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355 | #ifdef STATIC_FITZ_PLUGIN |
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356 | m_objectNames.insertMulti(PDF, QLatin1String("FitzPlugin")); |
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357 | #else |
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358 | m_fileNames.insertMulti(PDF, QLatin1String(FITZ_PLUGIN_NAME)); |
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359 | #endif // STATIC_FITZ_PLUGIN |
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360 | #endif // WITH_FITZ |
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361 | |
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362 | #ifdef WITH_PDF |
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363 | #ifdef STATIC_PDF_PLUGIN |
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364 | m_objectNames.insertMulti(PDF, QLatin1String("PdfPlugin")); |
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365 | #else |
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366 | m_fileNames.insertMulti(PDF, QLatin1String(PDF_PLUGIN_NAME)); |
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367 | #endif // STATIC_PDF_PLUGIN |
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368 | #endif // WITH_PDF |
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369 | |
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370 | #ifdef WITH_PS |
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371 | #ifdef STATIC_PS_PLUGIN |
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372 | m_objectNames.insertMulti(PS, QLatin1String("PsPlugin")); |
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373 | #else |
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374 | m_fileNames.insertMulti(PS, QLatin1String(PS_PLUGIN_NAME)); |
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375 | #endif // STATIC_PS_PLUGIN |
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376 | #endif // WITH_PS |
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377 | |
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378 | #ifdef WITH_DJVU |
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379 | #ifdef STATIC_DJVU_PLUGIN |
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380 | m_objectNames.insertMulti(DjVu, QLatin1String("DjVuPlugin")); |
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381 | #else |
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382 | m_fileNames.insertMulti(DjVu, QLatin1String(DJVU_PLUGIN_NAME)); |
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383 | #endif // STATIC_DJVU_PLUGIN |
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384 | #endif // WITH_DJVU |
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385 | } |
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386 | |
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387 | bool PluginHandler::loadPlugin(FileType fileType) |
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388 | { |
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389 | if(m_plugins.contains(fileType)) |
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390 | { |
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391 | return true; |
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392 | } |
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393 | |
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394 | foreach(const QString& objectName, m_objectNames.values(fileType)) |
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395 | { |
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396 | if(Plugin* plugin = ::loadStaticPlugin(objectName)) |
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397 | { |
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398 | m_plugins.insert(fileType, plugin); |
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399 | |
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400 | return true; |
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401 | } |
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402 | } |
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403 | |
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404 | foreach(const QString& fileName, m_fileNames.values(fileType)) |
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405 | { |
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406 | if(Plugin* plugin = ::loadPlugin(fileName)) |
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407 | { |
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408 | m_plugins.insert(fileType, plugin); |
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409 | |
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410 | return true; |
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411 | } |
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412 | } |
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413 | |
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414 | return false; |
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415 | } |
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416 | |
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417 | } // qpdfview |
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418 | |
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419 | #ifdef STATIC_IMAGE_PLUGIN |
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420 | #if QT_VERSION < QT_VERSION_CHECK(5,0,0) |
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421 | Q_IMPORT_PLUGIN(qpdfview_image) |
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422 | #else |
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423 | Q_IMPORT_PLUGIN(ImagePlugin) |
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424 | #endif // QT_VERSION |
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425 | #endif // STATIC_IMAGE_PLUGIN |
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426 | |
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427 | #ifdef STATIC_FITZ_PLUGIN |
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428 | #if QT_VERSION < QT_VERSION_CHECK(5,0,0) |
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429 | Q_IMPORT_PLUGIN(qpdfview_fitz) |
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430 | #else |
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431 | Q_IMPORT_PLUGIN(FitzPlugin) |
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432 | #endif // QT_VERSION |
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433 | #endif // STATIC_FITZ_PLUGIN |
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434 | |
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435 | #ifdef STATIC_PDF_PLUGIN |
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436 | #if QT_VERSION < QT_VERSION_CHECK(5,0,0) |
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437 | Q_IMPORT_PLUGIN(qpdfview_pdf) |
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438 | #else |
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439 | Q_IMPORT_PLUGIN(PdfPlugin) |
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440 | #endif // QT_VERSION |
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441 | #endif // STATIC_PDF_PLUGIN |
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442 | |
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443 | #ifdef STATIC_PS_PLUGIN |
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444 | #if QT_VERSION < QT_VERSION_CHECK(5,0,0) |
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445 | Q_IMPORT_PLUGIN(qpdfview_ps) |
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446 | #else |
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447 | Q_IMPORT_PLUGIN(PsPlugin) |
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448 | #endif // QT_VERSION |
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449 | #endif // STATIC_PS_PLUGIN |
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450 | |
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451 | #ifdef STATIC_DJVU_PLUGIN |
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452 | #if QT_VERSION < QT_VERSION_CHECK(5,0,0) |
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453 | Q_IMPORT_PLUGIN(qpdfview_djvu) |
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454 | #else |
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455 | Q_IMPORT_PLUGIN(DjvuPlugin) |
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456 | #endif // QT_VERSION |
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457 | #endif // STATIC_DJVU_PLUGIN |
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