Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 222 insertions, 0 deletions

diff --git a/akregator/src/pluginmanager.cpp b/akregator/src/pluginmanager.cpp
new file mode 100644
index 000000000..db6c70117
--- /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