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/kdenetwork@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 534 insertions, 0 deletions

diff --git a/kopete/libkopete/kopetepluginmanager.cpp b/kopete/libkopete/kopetepluginmanager.cpp
new file mode 100644
index 00000000..8f613a86
--- /dev/null
+++ b/kopete/libkopete/kopetepluginmanager.cpp
@@ -0,0 +1,534 @@
+/*
+    kopetepluginmanager.cpp - Kopete Plugin Loader
+
+    Copyright (c) 2002-2003 by Duncan Mac-Vicar Prett <[email protected]>
+    Copyright (c) 2002-2003 by Martijn Klingens       <[email protected]>
+    Copyright (c) 2002-2004 by Olivier Goffart  <ogoffart @tiscalinet.be>
+
+    Kopete    (c) 2002-2003 by the Kopete developers  <[email protected]>
+
+    *************************************************************************
+    *                                                                       *
+    * This library is free software; you can redistribute it and/or         *
+    * modify it under the terms of the GNU Lesser General Public            *
+    * License as published by the Free Software Foundation; either          *
+    * version 2 of the License, or (at your option) any later version.      *
+    *                                                                       *
+    *************************************************************************
+*/
+
+#include "config.h"
+
+#include "kopetepluginmanager.h"
+
+#if defined(HAVE_VALGRIND_H) && !defined(NDEBUG) && defined(__i386__)
+// We don't want the per-skin includes, so pretend we have a skin header already
+#define __VALGRIND_SOMESKIN_H
+#include <valgrind/valgrind.h>
+#endif
+
+#include <qapplication.h>
+#include <qfile.h>
+#include <qregexp.h>
+#include <qtimer.h>
+#include <qvaluestack.h>
+
+#include <kapplication.h>
+#include <kdebug.h>
+#include <kparts/componentfactory.h>
+#include <kplugininfo.h>
+#include <ksimpleconfig.h>
+#include <kstandarddirs.h>
+#include <kstaticdeleter.h>
+#include <kurl.h>
+
+#include "kopeteplugin.h"
+#include "kopetecontactlist.h"
+#include "kopeteaccountmanager.h"
+
+namespace Kopete
+{
+
+
+class PluginManager::Private
+{
+public:
+	Private() : shutdownMode( StartingUp ), isAllPluginsLoaded(false) {}
+
+	// All available plugins, regardless of category, and loaded or not
+	QValueList<KPluginInfo *> plugins;
+
+	// Dict of all currently loaded plugins, mapping the KPluginInfo to
+	// a plugin
+	typedef QMap<KPluginInfo *, Plugin *> InfoToPluginMap;
+	InfoToPluginMap loadedPlugins;
+
+	// The plugin manager's mode. The mode is StartingUp until loadAllPlugins()
+	// has finished loading the plugins, after which it is set to Running.
+	// ShuttingDown and DoneShutdown are used during Kopete shutdown by the
+	// async unloading of plugins.
+	enum ShutdownMode { StartingUp, Running, ShuttingDown, DoneShutdown };
+	ShutdownMode shutdownMode;
+
+	// Plugins pending for loading
+	QValueStack<QString> pluginsToLoad;
+
+	static KStaticDeleter<PluginManager> deleter;
+
+	bool isAllPluginsLoaded;
+};
+
+KStaticDeleter<PluginManager> PluginManager::Private::deleter;
+PluginManager* PluginManager::s_self = 0L;
+
+PluginManager* PluginManager::self()
+{
+	if ( !s_self )
+		Private::deleter.setObject( s_self, new PluginManager() );
+
+	return s_self;
+}
+
+PluginManager::PluginManager() : QObject( qApp ), d( new Private )
+{
+	d->plugins = KPluginInfo::fromServices( KTrader::self()->query( QString::fromLatin1( "Kopete/Plugin" ),
+		QString::fromLatin1( "[X-Kopete-Version] == 1000900" ) ) );
+
+	// We want to add a reference to the application's event loop so we
+	// can remain in control when all windows are removed.
+	// This way we can unload plugins asynchronously, which is more
+	// robust if they are still doing processing.
+	kapp->ref();
+}
+
+PluginManager::~PluginManager()
+{
+	if ( d->shutdownMode != Private::DoneShutdown )
+		kdWarning( 14010 ) << k_funcinfo << "Destructing plugin manager without going through the shutdown process! Backtrace is: " << endl << kdBacktrace() << endl;
+
+	// Quick cleanup of the remaining plugins, hope it helps
+	// Note that deleting it.data() causes slotPluginDestroyed to be called, which
+	// removes the plugin from the list of loaded plugins.
+	while ( !d->loadedPlugins.empty() )
+	{
+		Private::InfoToPluginMap::ConstIterator it = d->loadedPlugins.begin();
+		kdWarning( 14010 ) << k_funcinfo << "Deleting stale plugin '" << it.data()->name() << "'" << endl;
+		delete it.data();
+	}
+
+	delete d;
+}
+
+QValueList<KPluginInfo *> PluginManager::availablePlugins( const QString &category ) const
+{
+	if ( category.isEmpty() )
+		return d->plugins;
+
+	QValueList<KPluginInfo *> result;
+	QValueList<KPluginInfo *>::ConstIterator it;
+	for ( it = d->plugins.begin(); it != d->plugins.end(); ++it )
+	{
+		if ( ( *it )->category() == category )
+			result.append( *it );
+	}
+
+	return result;
+}
+
+PluginList PluginManager::loadedPlugins( const QString &category ) const
+{
+	PluginList result;
+	
+	for ( Private::InfoToPluginMap::ConstIterator it = d->loadedPlugins.begin();
+	      it != d->loadedPlugins.end(); ++it )
+	{
+		if ( category.isEmpty() || it.key()->category() == category )
+			result.append( it.data() );
+	}
+	
+	return result;
+}
+
+
+KPluginInfo *PluginManager::pluginInfo( const Plugin *plugin ) const
+{
+	for ( Private::InfoToPluginMap::ConstIterator it = d->loadedPlugins.begin();
+	      it != d->loadedPlugins.end(); ++it )
+	{
+		if ( it.data() == plugin )
+			return it.key();
+	}
+	return 0;
+}
+
+void PluginManager::shutdown()
+{
+	if(d->shutdownMode != Private::Running)
+	{
+		kdDebug( 14010 ) << k_funcinfo << "called when not running.  / state = " << d->shutdownMode << endl;
+		return;
+	}
+
+	d->shutdownMode = Private::ShuttingDown;
+	
+
+	/* save the contact list now, just in case a change was made very recently
+	   and it hasn't autosaved yet
+	   from a OO point of view, theses lines should not be there, but i don't
+	   see better place -Olivier
+	*/
+	Kopete::ContactList::self()->save();
+	Kopete::AccountManager::self()->save();
+	
+	// Remove any pending plugins to load, we're shutting down now :)
+	d->pluginsToLoad.clear();
+	
+	// Ask all plugins to unload
+	for ( Private::InfoToPluginMap::ConstIterator it = d->loadedPlugins.begin();
+	      it != d->loadedPlugins.end(); /* EMPTY */ )
+	{
+		// Plugins could emit their ready for unload signal directly in response to this,
+		// which would invalidate the current iterator. Therefore, we copy the iterator
+		// and increment it beforehand.
+		Private::InfoToPluginMap::ConstIterator current( it );
+		++it;
+		// FIXME: a much cleaner approach would be to just delete the plugin now. if it needs
+		//  to do some async processing, it can grab a reference to the app itself and create
+		//  another object to do it.
+		current.data()->aboutToUnload();
+	}
+	
+	// When running under valgrind, don't enable the timer because it will almost
+	// certainly fire due to valgrind's much slower processing
+#if defined(HAVE_VALGRIND_H) && !defined(NDEBUG) && defined(__i386__)
+	if ( RUNNING_ON_VALGRIND )
+		kdDebug(14010) << k_funcinfo << "Running under valgrind, disabling plugin unload timeout guard" << endl;
+	else
+#endif
+		QTimer::singleShot( 3000, this, SLOT( slotShutdownTimeout() ) );
+}
+
+void PluginManager::slotPluginReadyForUnload()
+{
+	// Using QObject::sender() is on purpose here, because otherwise all
+	// plugins would have to pass 'this' as parameter, which makes the API
+	// less clean for plugin authors
+	// FIXME: I don't buy the above argument. Add a Kopete::Plugin::emitReadyForUnload(void),
+	//        and make readyForUnload be passed a plugin. - Richard
+	Plugin *plugin = dynamic_cast<Plugin *>( const_cast<QObject *>( sender() ) );
+	kdDebug( 14010 ) << k_funcinfo << plugin->pluginId() << "ready for unload" << endl;
+	if ( !plugin )
+	{
+		kdWarning( 14010 ) << k_funcinfo << "Calling object is not a plugin!" << endl;
+		return;
+	}
+	
+	plugin->deleteLater();
+}
+
+
+void PluginManager::slotShutdownTimeout()
+{
+	// When we were already done the timer might still fire.
+	// Do nothing in that case.
+	if ( d->shutdownMode == Private::DoneShutdown )
+		return;
+
+	QStringList remaining;
+	for ( Private::InfoToPluginMap::ConstIterator it = d->loadedPlugins.begin(); it != d->loadedPlugins.end(); ++it )
+		remaining.append( it.data()->pluginId() );
+
+	kdWarning( 14010 ) << k_funcinfo << "Some plugins didn't shutdown in time!" << endl
+		<< "Remaining plugins: " << remaining.join( QString::fromLatin1( ", " ) ) << endl
+		<< "Forcing Kopete shutdown now." << endl;
+
+	slotShutdownDone();
+}
+
+void PluginManager::slotShutdownDone()
+{
+	kdDebug( 14010 ) << k_funcinfo << endl;
+
+	d->shutdownMode = Private::DoneShutdown;
+
+	kapp->deref();
+}
+
+void PluginManager::loadAllPlugins()
+{
+	// FIXME: We need session management here - Martijn
+
+	KConfig *config = KGlobal::config();
+	if ( config->hasGroup( QString::fromLatin1( "Plugins" ) ) )
+	{
+		QMap<QString, bool> pluginsMap;
+
+		QMap<QString, QString> entries = config->entryMap( QString::fromLatin1( "Plugins" ) );
+		QMap<QString, QString>::Iterator it;
+		for ( it = entries.begin(); it != entries.end(); ++it )
+		{
+			QString key = it.key();
+			if ( key.endsWith( QString::fromLatin1( "Enabled" ) ) )
+				pluginsMap.insert( key.left( key.length() - 7 ), (it.data() == QString::fromLatin1( "true" )) );
+		}
+
+		QValueList<KPluginInfo *> plugins = availablePlugins( QString::null );
+		QValueList<KPluginInfo *>::ConstIterator it2 = plugins.begin();
+		QValueList<KPluginInfo *>::ConstIterator end = plugins.end();
+		for ( ; it2 != end; ++it2 )
+		{
+			// Protocols are loaded automatically so they aren't always in Plugins group. (fixes bug 167113)
+			if ( (*it2)->category() == QString::fromLatin1( "Protocols" ) )
+				continue;
+
+			QString pluginName = (*it2)->pluginName();
+			bool inMap = pluginsMap.contains( pluginName );
+			if ( (inMap && pluginsMap[pluginName]) || (!inMap && (*it2)->isPluginEnabledByDefault()) )
+			{
+				if ( !plugin( pluginName ) )
+					d->pluginsToLoad.push( pluginName );
+			}
+			else
+			{
+				//This happens if the user unloaded plugins with the config plugin page.
+				// No real need to be assync because the user usualy unload few plugins
+				// compared tto the number of plugin to load in a cold start. - Olivier
+				if ( plugin( pluginName ) )
+					unloadPlugin( pluginName );
+			}
+		}
+	}
+	else
+	{
+		// we had no config, so we load any plugins that should be loaded by default.
+		QValueList<KPluginInfo *> plugins = availablePlugins( QString::null );
+		QValueList<KPluginInfo *>::ConstIterator it = plugins.begin();
+		QValueList<KPluginInfo *>::ConstIterator end = plugins.end();
+		for ( ; it != end; ++it )
+		{
+			if ( (*it)->isPluginEnabledByDefault() )
+				d->pluginsToLoad.push( (*it)->pluginName() );
+		}
+	}
+	// Schedule the plugins to load
+	QTimer::singleShot( 0, this, SLOT( slotLoadNextPlugin() ) );
+}
+
+void PluginManager::slotLoadNextPlugin()
+{
+	if ( d->pluginsToLoad.isEmpty() )
+	{
+		if ( d->shutdownMode == Private::StartingUp )
+		{
+			d->shutdownMode = Private::Running;
+			d->isAllPluginsLoaded = true;
+			emit allPluginsLoaded();
+		}
+		return;
+	}
+
+	QString key = d->pluginsToLoad.pop();
+	loadPluginInternal( key );
+
+	// Schedule the next run unconditionally to avoid code duplication on the
+	// allPluginsLoaded() signal's handling. This has the added benefit that
+	// the signal is delayed one event loop, so the accounts are more likely
+	// to be instantiated.
+	QTimer::singleShot( 0, this, SLOT( slotLoadNextPlugin() ) );
+}
+
+Plugin * PluginManager::loadPlugin( const QString &_pluginId, PluginLoadMode mode /* = LoadSync */ )
+{
+	QString pluginId = _pluginId;
+
+	// Try to find legacy code
+	// FIXME: Find any cases causing this, remove them, and remove this too - Richard
+	if ( pluginId.endsWith( QString::fromLatin1( ".desktop" ) ) )
+	{
+		kdWarning( 14010 ) << "Trying to use old-style API!" << endl << kdBacktrace() << endl;
+		pluginId = pluginId.remove( QRegExp( QString::fromLatin1( ".desktop$" ) ) );
+	}
+
+	if ( mode == LoadSync )
+	{
+		return loadPluginInternal( pluginId );
+	}
+	else
+	{
+		d->pluginsToLoad.push( pluginId );
+		QTimer::singleShot( 0, this, SLOT( slotLoadNextPlugin() ) );
+		return 0L;
+	}
+}
+
+Plugin *PluginManager::loadPluginInternal( const QString &pluginId )
+{
+	//kdDebug( 14010 ) << k_funcinfo << pluginId << endl;
+
+	KPluginInfo *info = infoForPluginId( pluginId );
+	if ( !info )
+	{
+		kdWarning( 14010 ) << k_funcinfo << "Unable to find a plugin named '" << pluginId << "'!" << endl;
+		return 0L;
+	}
+
+	if ( d->loadedPlugins.contains( info ) )
+		return d->loadedPlugins[ info ];
+
+	int error = 0;
+	Plugin *plugin = KParts::ComponentFactory::createInstanceFromQuery<Plugin>( QString::fromLatin1( "Kopete/Plugin" ),
+		QString::fromLatin1( "[X-KDE-PluginInfo-Name]=='%1'" ).arg( pluginId ), this, 0, QStringList(), &error );
+
+	if ( plugin )
+	{
+		d->loadedPlugins.insert( info, plugin );
+		info->setPluginEnabled( true );
+
+		connect( plugin, SIGNAL( destroyed( QObject * ) ), this, SLOT( slotPluginDestroyed( QObject * ) ) );
+		connect( plugin, SIGNAL( readyForUnload() ), this, SLOT( slotPluginReadyForUnload() ) );
+
+		kdDebug( 14010 ) << k_funcinfo << "Successfully loaded plugin '" << pluginId << "'" << endl;
+
+		emit pluginLoaded( plugin );
+	}
+	else
+	{
+		switch( error )
+		{
+		case KParts::ComponentFactory::ErrNoServiceFound:
+			kdDebug( 14010 ) << k_funcinfo << "No service implementing the given mimetype "
+				<< "and fullfilling the given constraint expression can be found." << endl;
+			break;
+
+		case KParts::ComponentFactory::ErrServiceProvidesNoLibrary:
+			kdDebug( 14010 ) << "the specified service provides no shared library." << endl;
+			break;
+
+		case KParts::ComponentFactory::ErrNoLibrary:
+			kdDebug( 14010 ) << "the specified library could not be loaded." << endl;
+			break;
+
+		case KParts::ComponentFactory::ErrNoFactory:
+			kdDebug( 14010 ) << "the library does not export a factory for creating components." << endl;
+			break;
+
+		case KParts::ComponentFactory::ErrNoComponent:
+			kdDebug( 14010 ) << "the factory does not support creating components of the specified type." << endl;
+			break;
+		}
+
+		kdDebug( 14010 ) << k_funcinfo << "Loading plugin '" << pluginId << "' failed, KLibLoader reported error: '" << endl <<
+			KLibLoader::self()->lastErrorMessage() << "'" << endl;
+	}
+
+	return plugin;
+}
+
+bool PluginManager::unloadPlugin( const QString &spec )
+{
+	//kdDebug(14010) << k_funcinfo << spec << endl;
+	if( Plugin *thePlugin = plugin( spec ) )
+	{
+		thePlugin->aboutToUnload();
+		return true;
+	}
+	else
+		return false;
+}
+
+
+
+void PluginManager::slotPluginDestroyed( QObject *plugin )
+{
+	for ( Private::InfoToPluginMap::Iterator it = d->loadedPlugins.begin();
+	      it != d->loadedPlugins.end(); ++it )
+	{
+		if ( it.data() == plugin )
+		{
+			d->loadedPlugins.erase( it );
+			break;
+		}
+	}
+
+	if ( d->shutdownMode == Private::ShuttingDown && d->loadedPlugins.isEmpty() )
+	{
+		// Use a timer to make sure any pending deleteLater() calls have
+		// been handled first
+		QTimer::singleShot( 0, this, SLOT( slotShutdownDone() ) );
+	}
+}
+
+
+
+
+Plugin* PluginManager::plugin( const QString &_pluginId ) const
+{
+	// Hack for compatibility with Plugin::pluginId(), which returns
+	// classname() instead of the internal name. Changing that is not easy
+	// as it invalidates the config file, the contact list, and most likely
+	// other code as well.
+	// For now, just transform FooProtocol to kopete_foo.
+	// FIXME: In the future we'll need to change this nevertheless to unify
+	//        the handling - Martijn
+	QString pluginId = _pluginId;
+	if ( pluginId.endsWith( QString::fromLatin1( "Protocol" ) ) )
+		pluginId = QString::fromLatin1( "kopete_" ) + _pluginId.lower().remove( QString::fromLatin1( "protocol" ) );
+	// End hack
+
+	KPluginInfo *info = infoForPluginId( pluginId );
+	if ( !info )
+		return 0L;
+
+	if ( d->loadedPlugins.contains( info ) )
+		return d->loadedPlugins[ info ];
+	else
+		return 0L;
+}
+
+KPluginInfo * PluginManager::infoForPluginId( const QString &pluginId ) const
+{
+	QValueList<KPluginInfo *>::ConstIterator it;
+	for ( it = d->plugins.begin(); it != d->plugins.end(); ++it )
+	{
+		if ( ( *it )->pluginName() == pluginId )
+			return *it;
+	}
+
+	return 0L;
+}
+
+
+bool PluginManager::setPluginEnabled( const QString &_pluginId, bool enabled /* = true */ )
+{
+	QString pluginId = _pluginId;
+
+	KConfig *config = KGlobal::config();
+	config->setGroup( "Plugins" );
+
+	// FIXME: What is this for? This sort of thing is kconf_update's job - Richard
+	if ( !pluginId.startsWith( QString::fromLatin1( "kopete_" ) ) )
+		pluginId.prepend( QString::fromLatin1( "kopete_" ) );
+
+	if ( !infoForPluginId( pluginId ) )
+		return false;
+
+	config->writeEntry( pluginId + QString::fromLatin1( "Enabled" ), enabled );
+	config->sync();
+
+	return true;
+}
+
+bool PluginManager::isAllPluginsLoaded() const
+{
+	return d->isAllPluginsLoaded;
+}
+
+} //END namespace Kopete
+
+
+#include "kopetepluginmanager.moc"
+
+
+
+
+