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247 lines
7.3 KiB
247 lines
7.3 KiB
/*
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kopetepluginmanager.h - Kopete Plugin Loader
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Copyright (c) 2002-2003 by Duncan Mac-Vicar Prett <duncan@kde.org>
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Copyright (c) 2002-2003 by Martijn Klingens <klingens@kde.org>
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Kopete (c) 2002-2003 by the Kopete developers <kopete-devel@kde.org>
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*************************************************************************
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Lesser General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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*************************************************************************
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*/
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#ifndef KOPETEPLUGINMANAGER_H
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#define KOPETEPLUGINMANAGER_H
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#include <qmap.h>
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#include <qobject.h>
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#include <qstring.h>
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#include <qstringlist.h>
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#include <qvaluelist.h>
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#include "kopete_export.h"
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class KPluginInfo;
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namespace Kopete
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{
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class Plugin;
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typedef QValueList<Plugin*> PluginList;
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/**
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* @author Duncan Mac-Vicar Prett <duncan@kde.org>
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* @author Martijn Klingens <klingens@kde.org>
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*/
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class KOPETE_EXPORT PluginManager : public QObject
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{
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Q_OBJECT
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Q_ENUMS( PluginLoadMode )
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public:
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/**
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* Retrieve the plugin loader instance.
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*/
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static PluginManager* self();
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~PluginManager();
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/**
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* Returns a list of all available plugins for the given category.
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* Currently there are two categories, "Plugins" and "Protocols", but
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* you can add your own categories if you want.
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*
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* If you pass an empty string you get the complete list of ALL plugins.
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*
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* You can query all information on the plugins through the KPluginInfo
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* interface.
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*/
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QValueList<KPluginInfo *> availablePlugins( const QString &category = QString::null ) const;
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/**
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* Returns a list of all plugins that are actually loaded.
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* If you omit the category you get all, otherwise it's a filtered list.
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* See also @ref availablePlugins().
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*/
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PluginList loadedPlugins( const QString &category = QString::null ) const;
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/**
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* @brief Search by plugin name. This is the key used as X-KDE-PluginInfo-Name in
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* the .desktop file, e.g. "kopete_jabber"
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*
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* @return The @ref Kopete::Plugin object found by the search, or a null
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* pointer if the plugin is not loaded.
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*
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* If you want to also load the plugin you can better use @ref loadPlugin, which returns
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* the pointer to the plugin if it's already loaded.
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*/
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Plugin *plugin( const QString &pluginName ) const;
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/**
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* @return the KPluginInfo for the specified plugin
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*/
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KPluginInfo *pluginInfo( const Kopete::Plugin *plugin ) const;
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/**
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* Shuts down the plugin manager on Kopete shutdown, but first
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* unloads all plugins asynchronously.
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*
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* After 3 seconds all plugins should be removed; what's still left
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* by then is unloaded through a hard delete instead.
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*
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* Note that this call also derefs the plugin manager from the event
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* loop, so do NOT call this method when not terminating Kopete!
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*/
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void shutdown();
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/**
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* Enable a plugin.
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*
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* This marks a plugin as enabled in the config file, so loadAll()
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* can pick it up later.
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*
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* This method does not actually load a plugin, it only edits the
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* config file.
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*
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* @param name is the name of the plugin as it is listed in the .desktop
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* file in the X-KDE-Library field.
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* @param enabled sets whether or not the plugin is enabled
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*
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* Returns false when no appropriate plugin can be found.
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*/
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bool setPluginEnabled( const QString &name, bool enabled = true );
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/**
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* This method check if all the plugins are loaded.
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* @return true if all the plugins are loaded.
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*/
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bool isAllPluginsLoaded() const;
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/**
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* Plugin loading mode. Used by @ref loadPlugin(). Code that doesn't want to block
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* the GUI and/or lot a lot of plugins at once should use asynchronous loading (@c LoadAsync).
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* The default is synchronous loading (@c LoadSync).
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*/
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enum PluginLoadMode { LoadSync, LoadAsync };
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public slots:
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/**
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* @brief Load a single plugin by plugin name. Returns an existing plugin
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* if one is already loaded in memory.
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*
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* If mode is set to Async, the plugin will be queued and loaded in
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* the background. This method will return a null pointer. To get
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* the loaded plugin you can track the @ref pluginLoaded() signal.
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*
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* See also @ref plugin().
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*/
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Plugin *loadPlugin( const QString &pluginId, PluginLoadMode mode = LoadSync );
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/**
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* @brief Unload the plugin specified by @p pluginName
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*/
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bool unloadPlugin( const QString &pluginName );
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/**
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* @brief Loads all the enabled plugins. Also used to reread the
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* config file when the configuration has changed.
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*/
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void loadAllPlugins();
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signals:
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/**
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* @brief Signals a new plugin has just been loaded.
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*/
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void pluginLoaded( Kopete::Plugin *plugin );
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/**
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* @brief All plugins have been loaded by the plugin manager.
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*
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* This signal is emitted exactly ONCE, when the plugin manager has emptied
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* its plugin queue for the first time. This means that if you call an async
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* loadPlugin() before loadAllPlugins() this signal is probably emitted after
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* the initial call completes, unless you are quick enough to fill the queue
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* before it completes, which is a dangerous race you shouldn't count upon :)
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*
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* The signal is delayed one event loop iteration through a singleShot timer,
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* but that is not guaranteed to be enough for account instantiation. You may
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* need an additional timer for it in the code if you want to programmatically
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* act on it.
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*
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* If you use the signal for enabling/disabling GUI objects there is little
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* chance a user is able to activate them in the short while that's remaining,
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* the slow part of the code is over now and the remaining processing time
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* is neglectable for the user.
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*/
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void allPluginsLoaded();
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private slots:
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/**
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* @brief Cleans up some references if the plugin is destroyed
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*/
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void slotPluginDestroyed( QObject *plugin );
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/**
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* shutdown() starts a timer, when it fires we force all plugins
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* to be unloaded here by deref()-ing the event loop to trigger the plugin
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* manager's destruction
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*/
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void slotShutdownTimeout();
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/**
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* Common entry point to deref() the KApplication. Used both by the clean
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* shutdown and the timeout condition of slotShutdownTimeout()
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*/
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void slotShutdownDone();
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/**
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* Emitted by a Kopete::Plugin when it's ready for unload
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*/
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void slotPluginReadyForUnload();
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/**
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* Load a plugin from our queue. Does nothing if the queue is empty.
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* Schedules itself again if more plugins are pending.
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*/
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void slotLoadNextPlugin();
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private:
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/**
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* @internal
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*
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* The internal method for loading plugins.
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* Called by @ref loadPlugin directly or through the queue for async plugin
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* loading.
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*/
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Plugin * loadPluginInternal( const QString &pluginId );
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/**
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* @internal
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*
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* Find the KPluginInfo structure by key. Reduces some code duplication.
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*
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* Returns a null pointer when no plugin info is found.
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*/
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KPluginInfo * infoForPluginId( const QString &pluginId ) const;
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PluginManager();
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class Private;
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Private *d;
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static PluginManager *s_self;
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};
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}
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#endif // KOPETEPLUGINMANAGER_H
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// vim: set noet ts=4 sts=4 sw=4:
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