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Diffstat (limited to 'akregator/src/pluginmanager.cpp')
| -rw-r--r-- | akregator/src/pluginmanager.cpp | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/akregator/src/pluginmanager.cpp b/akregator/src/pluginmanager.cpp new file mode 100644 index 00000000..db6c7011 --- /dev/null +++ b/akregator/src/pluginmanager.cpp @@ -0,0 +1,222 @@ +/*************************************************************************** +begin : 2004/03/12 +copyright : (C) Mark Kretschmann +email : markey@web.de +***************************************************************************/ + +/*************************************************************************** + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + ***************************************************************************/ + +#include "plugin.h" +#include "pluginmanager.h" + +#include <vector> + +#include <qfile.h> +#include <qstring.h> + +#include <klibloader.h> +#include <kdebug.h> +#include <klocale.h> +#include <kmessagebox.h> + +using std::vector; +using Akregator::Plugin; + +namespace Akregator { + +vector<PluginManager::StoreItem> +PluginManager::m_store; + + +///////////////////////////////////////////////////////////////////////////////////// +// PUBLIC INTERFACE +///////////////////////////////////////////////////////////////////////////////////// + +KTrader::OfferList +PluginManager::query( const QString& constraint ) +{ + // Add versioning constraint + QString + str = "[X-KDE-akregator-framework-version] == "; + str += QString::number( FrameworkVersion ); + str += " and "; + if (!constraint.stripWhiteSpace().isEmpty()) + str += constraint + " and "; + str += "[X-KDE-akregator-rank] > 0"; + + kdDebug() << "Plugin trader constraint: " << str << endl; + + return KTrader::self()->query( "Akregator/Plugin", str ); +} + + +Plugin* +PluginManager::createFromQuery( const QString &constraint ) +{ + KTrader::OfferList offers = query( constraint ); + + if ( offers.isEmpty() ) { + kdWarning() << k_funcinfo << "No matching plugin found.\n"; + return 0; + } + + // Select plugin with highest rank + int rank = 0; + uint current = 0; + for ( uint i = 0; i < offers.count(); i++ ) { + if ( offers[i]->property( "X-KDE-akregator-rank" ).toInt() > rank ) + current = i; + } + + return createFromService( offers[current] ); +} + + +Plugin* +PluginManager::createFromService( const KService::Ptr service ) +{ + kdDebug() << "Trying to load: " << service->library() << endl; + + //get the library loader instance + KLibLoader *loader = KLibLoader::self(); + //try to load the specified library + KLibrary *lib = loader->globalLibrary( QFile::encodeName( service->library() ) ); + + if ( !lib ) { + KMessageBox::error( 0, i18n( "<p>KLibLoader could not load the plugin:<br/><i>%1</i></p>" + "<p>Error message:<br/><i>%2</i></p>" ) + .arg( service->library() ) + .arg( loader->lastErrorMessage() ) ); + return 0; + } + //look up address of init function and cast it to pointer-to-function + Plugin* (*create_plugin)() = ( Plugin* (*)() ) lib->symbol( "create_plugin" ); + + if ( !create_plugin ) { + kdWarning() << k_funcinfo << "create_plugin == NULL\n"; + return 0; + } + //create plugin on the heap + Plugin* plugin = create_plugin(); + + //put plugin into store + StoreItem item; + item.plugin = plugin; + item.library = lib; + item.service = service; + m_store.push_back( item ); + + dump( service ); + return plugin; +} + + +void +PluginManager::unload( Plugin* plugin ) +{ + vector<StoreItem>::iterator iter = lookupPlugin( plugin ); + + if ( iter != m_store.end() ) { + delete (*iter).plugin; + kdDebug() << "Unloading library: "<< (*iter).service->library() << endl; + (*iter).library->unload(); + + m_store.erase( iter ); + } + else + kdWarning() << k_funcinfo << "Could not unload plugin (not found in store).\n"; +} + + +KService::Ptr +PluginManager::getService( const Plugin* plugin ) +{ + if ( !plugin ) { + kdWarning() << k_funcinfo << "pointer == NULL\n"; + return 0; + } + + //search plugin in store + vector<StoreItem>::const_iterator iter = lookupPlugin( plugin ); + + if ( iter == m_store.end() ) + kdWarning() << k_funcinfo << "Plugin not found in store.\n"; + + return (*iter).service; +} + + +void +PluginManager::showAbout( const QString &constraint ) +{ + KTrader::OfferList offers = query( constraint ); + + if ( offers.isEmpty() ) + return; + + KService::Ptr s = offers.front(); + + const QString body = "<tr><td>%1</td><td>%2</td></tr>"; + + QString str = "<html><body><table width=\"100%\" border=\"1\">"; + + str += body.arg( i18n( "Name" ), s->name() ); + str += body.arg( i18n( "Library" ), s->library() ); + str += body.arg( i18n( "Authors" ), s->property( "X-KDE-akregator-authors" ).toStringList().join( "\n" ) ); + str += body.arg( i18n( "Email" ), s->property( "X-KDE-akregator-email" ).toStringList().join( "\n" ) ); + str += body.arg( i18n( "Version" ), s->property( "X-KDE-akregator-version" ).toString() ); + str += body.arg( i18n( "Framework Version" ), s->property( "X-KDE-akregator-framework-version" ).toString() ); + + str += "</table></body></html>"; + + KMessageBox::information( 0, str, i18n( "Plugin Information" ) ); +} + + +void +PluginManager::dump( const KService::Ptr service ) +{ + kdDebug() + << "PluginManager Service Info:" << endl + << "---------------------------" << endl + << "name : " << service->name() << endl + << "library : " << service->library() << endl + << "desktopEntryPath : " << service->desktopEntryPath() << endl + << "X-KDE-akregator-plugintype : " << service->property( "X-KDE-akregator-plugintype" ).toString() << endl + << "X-KDE-akregator-name : " << service->property( "X-KDE-akregator-name" ).toString() << endl + << "X-KDE-akregator-authors : " << service->property( "X-KDE-akregator-authors" ).toStringList() << endl + << "X-KDE-akregator-rank : " << service->property( "X-KDE-akregator-rank" ).toString() << endl + << "X-KDE-akregator-version : " << service->property( "X-KDE-akregator-version" ).toString() << endl + << "X-KDE-akregator-framework-version: " << service->property( "X-KDE-akregator-framework-version" ).toString() + << endl; + +} + + +///////////////////////////////////////////////////////////////////////////////////// +// PRIVATE INTERFACE +///////////////////////////////////////////////////////////////////////////////////// + +vector<PluginManager::StoreItem>::iterator +PluginManager::lookupPlugin( const Plugin* plugin ) +{ + vector<StoreItem>::iterator iter; + + //search plugin pointer in store + vector<StoreItem>::const_iterator end; + for ( iter = m_store.begin(); iter != end; ++iter ) { + if ( (*iter).plugin == plugin ) + break; + } + + return iter; +} + +} // namespace Akregator |