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-rw-r--r--akregator/src/pluginmanager.cpp222
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diff --git a/akregator/src/pluginmanager.cpp b/akregator/src/pluginmanager.cpp
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+/***************************************************************************
+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