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00024 #include <qfile.h>
00025 #include <qlabel.h>
00026 #include <qlayout.h>
00027
00028 #include <kapplication.h>
00029 #include <kdebug.h>
00030 #include <klocale.h>
00031 #include <kmessagebox.h>
00032 #include <kparts/componentfactory.h>
00033
00034 #include "kcmoduleloader.h"
00035
00036
00037
00042 class KCMError : public KCModule
00043 {
00044 public:
00045 KCMError( const QString& msg, const QString& details, QWidget* parent )
00046 : KCModule( parent, "KCMError" )
00047 {
00048 QVBoxLayout* topLayout = new QVBoxLayout( this );
00049 topLayout->addWidget( new QLabel( msg, this ) );
00050 topLayout->addWidget( new QLabel( details, this ) );
00051 }
00052 };
00053
00054
00055
00056
00057
00058 KCModule* KCModuleLoader::load(const KCModuleInfo &mod, const QString &libname,
00059 KLibLoader *loader, ErrorReporting report, QWidget * parent,
00060 const char * name, const QStringList & args )
00061 {
00062
00063
00064
00065 KLibrary *lib = loader->library(QFile::encodeName(libname.arg(mod.library())));
00066 if (lib) {
00067 QString initSym("init_");
00068 initSym += libname.arg(mod.library());
00069
00070 if ( lib->hasSymbol(QFile::encodeName(initSym)) )
00071 {
00072 KLibFactory *factory = lib->factory();
00073 if ( factory )
00074 {
00075 KCModule *module = KParts::ComponentFactory::createInstanceFromFactory<KCModule>( factory, parent, name ? name : mod.handle().latin1(), args );
00076 if (module)
00077 return module;
00078 }
00079
00080 kdDebug(1208) << "Unable to load module using ComponentFactory. Falling back to old loader." << endl;
00081 }
00082
00083
00084 QString factory("create_%1");
00085 void *create = lib->symbol(QFile::encodeName(factory.arg(mod.handle())));
00086
00087 if (create)
00088 {
00089
00090 KCModule* (*func)(QWidget *, const char *);
00091 func = (KCModule* (*)(QWidget *, const char *)) create;
00092 return func( parent, name ? name : mod.handle().latin1() );
00093 }
00094 else
00095 {
00096 lib->unload();
00097 return reportError( report, i18n("<qt>There was an error when loading the module '%1'.<br><br>"
00098 "The desktop file (%2) as well as the library (%3) was found but "
00099 "yet the module could not be loaded properly. Most likely "
00100 "the factory declaration was wrong, or the "
00101 "create_* function was missing.</qt>")
00102 .arg( mod.moduleName() )
00103 .arg( mod.fileName() )
00104 .arg( lib->fileName() ),
00105 QString::null, parent );
00106 }
00107
00108 lib->unload();
00109 }
00110 return reportError( report, i18n("The specified library %1 could not be found.")
00111 .arg( mod.library() ), QString::null, parent );
00112 return 0;
00113 }
00114
00115 KCModule* KCModuleLoader::loadModule(const KCModuleInfo &mod, bool withfallback, QWidget * parent, const char * name, const QStringList & args )
00116 {
00117 return loadModule( mod, None, withfallback, parent, name, args );
00118 }
00119
00120 KCModule* KCModuleLoader::loadModule(const KCModuleInfo &mod, ErrorReporting report, bool withfallback, QWidget * parent, const char * name, const QStringList & args )
00121 {
00122
00123
00124
00125
00126
00127
00128 if ( !mod.service() )
00129 {
00130 return reportError( report,
00131 i18n("The module %1 could not be found.")
00132 .arg( mod.moduleName() ), i18n("<qt><p>The diagnostics is:<br>The desktop file %1 could not be found.</qt>").arg(mod.fileName()), parent );
00133 }
00134
00135 if (!mod.library().isEmpty())
00136 {
00137
00138
00139 KLibLoader *loader = KLibLoader::self();
00140
00141 KCModule *module = load(mod, "kcm_%1", loader, report, parent, name, args );
00142
00143
00144
00145
00146 if (!KLibLoader::findLibrary( QCString( "libkcm_" ) + QFile::encodeName( mod.library() ) ).isEmpty() )
00147 module = load(mod, "libkcm_%1", loader, report, parent, name, args );
00148 if (module)
00149 return module;
00150 return reportError( report,
00151 i18n("The module %1 could not be loaded.")
00152 .arg( mod.moduleName() ), QString::null, parent );
00153 }
00154
00155
00156
00157
00158
00159
00160
00161
00162
00163 if(withfallback)
00164 {
00165 KApplication::startServiceByDesktopPath(mod.fileName(), QString::null);
00166 }
00167 else
00168 {
00169 return reportError( report,
00170 i18n("The module %1 is not a valid configuration module.")
00171 .arg( mod.moduleName() ), i18n("<qt><p>The diagnostics is:<br>The desktop file %1 does not specify a library.</qt>").arg(mod.fileName()), parent );
00172 }
00173
00174 return 0;
00175 }
00176
00177 KCModule* KCModuleLoader::loadModule(const QString &module, QWidget *parent,
00178 const char *name, const QStringList & args)
00179 {
00180 return loadModule(KCModuleInfo(module), None, false, parent, name, args);
00181 }
00182
00183 KCModule* KCModuleLoader::loadModule(const QString &module, ErrorReporting
00184 report, QWidget *parent, const char *name, const QStringList & args)
00185 {
00186 return loadModule(KCModuleInfo(module), report, false, parent, name, args);
00187 }
00188
00189 void KCModuleLoader::unloadModule(const KCModuleInfo &mod)
00190 {
00191
00192 KLibLoader *loader = KLibLoader::self();
00193
00194
00195 QString libname("libkcm_%1");
00196 loader->unloadLibrary(QFile::encodeName(libname.arg(mod.library())));
00197
00198 libname = "kcm_%1";
00199 loader->unloadLibrary(QFile::encodeName(libname.arg(mod.library())));
00200 }
00201
00202 void KCModuleLoader::showLastLoaderError(QWidget *parent)
00203 {
00204 KMessageBox::detailedError(parent,
00205 i18n("There was an error loading the module."),i18n("<qt><p>The diagnostics is:<br>%1"
00206 "<p>Possible reasons:</p><ul><li>An error occurred during your last "
00207 "KDE upgrade leaving an orphaned control module<li>You have old third party "
00208 "modules lying around.</ul><p>Check these points carefully and try to remove "
00209 "the module mentioned in the error message. If this fails, consider contacting "
00210 "your distributor or packager.</p></qt>")
00211 .arg(KLibLoader::self()->lastErrorMessage()));
00212
00213 }
00214
00215 bool KCModuleLoader::testModule( const QString& module )
00216 {
00217 return testModule( KCModuleInfo( module ) );
00218 }
00219
00220 bool KCModuleLoader::testModule( const KCModuleInfo& module )
00221 {
00222 if (!module.service())
00223 {
00224 kdDebug(1208) << "Module '" << module.fileName() << "' not found." << endl;
00225 return true;
00226 }
00227
00228 bool doLoad = module.service()->property( "X-KDE-Test-Module", QVariant::Bool ).toBool();
00229 if( !doLoad )
00230 {
00231 return true;
00232 }
00233 else
00234 {
00241 KLibLoader* loader = KLibLoader::self();
00242 KLibrary* library = loader->library( QFile::encodeName((QString("kcm_%1").arg(module.library()))) );
00243 if( library )
00244 {
00245 void *test_func = library->symbol( QString("test_%1").arg(module.factoryName()).utf8() );
00246 if( test_func )
00247 {
00248 bool (*func)() = (bool(*)())test_func;
00249 if( func() )
00250 {
00251 return true;
00252 }
00253 else
00254 {
00255 return false;
00256 }
00257 }
00258 else
00259 {
00260 kdDebug(1208) << "The test function for module '" << module.fileName() << "' could not be found." << endl;
00261 return true;
00262 }
00263 }
00264 kdDebug(1208) << "The library '" << module.library() << "' could not be found." << endl;
00265 return true;
00266 }
00267 }
00268
00269 KCModule* KCModuleLoader::reportError( ErrorReporting report, const QString & text,
00270 QString details, QWidget * parent )
00271 {
00272 if( details.isNull() )
00273 details = i18n("<qt><p>The diagnostics is:<br>%1"
00274 "<p>Possible reasons:</p><ul><li>An error occurred during your last "
00275 "KDE upgrade leaving an orphaned control module<li>You have old third party "
00276 "modules lying around.</ul><p>Check these points carefully and try to remove "
00277 "the module mentioned in the error message. If this fails, consider contacting "
00278 "your distributor or packager.</p></qt>").arg(KLibLoader::self()->lastErrorMessage());
00279 if( report & Dialog )
00280 KMessageBox::detailedError( parent, text, details );
00281 if( report & Inline )
00282 return new KCMError( text, details, parent );
00283 return 0;
00284 }
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00287