summaryrefslogtreecommitdiffstats
path: root/libtdepim/komposer/core/pluginmanager.h
diff options
context:
space:
mode:
Diffstat (limited to 'libtdepim/komposer/core/pluginmanager.h')
-rw-r--r--libtdepim/komposer/core/pluginmanager.h252
1 files changed, 252 insertions, 0 deletions
diff --git a/libtdepim/komposer/core/pluginmanager.h b/libtdepim/komposer/core/pluginmanager.h
new file mode 100644
index 000000000..34cc6b9c5
--- /dev/null
+++ b/libtdepim/komposer/core/pluginmanager.h
@@ -0,0 +1,252 @@
+// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+/**
+ * pluginmanager.h
+ *
+ * Copyright (C) 2004 Zack Rusin <zack@kde.org>
+ * Copyright (C) 2003 Martijn Klingens <klingens@kde.org>
+ *
+ * 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef KOMPOSER_PLUGINMANAGER_H
+#define KOMPOSER_PLUGINMANAGER_H
+
+#include <tqmap.h>
+#include <tqobject.h>
+#include <tqstring.h>
+#include <tqstringlist.h>
+#include <tqvaluelist.h>
+
+class KPluginInfo;
+
+namespace Komposer
+{
+
+ class Plugin;
+
+ class PluginManager : public TQObject
+ {
+ Q_OBJECT
+ TQ_OBJECT
+
+ public:
+ PluginManager( TQObject * );
+
+ ~PluginManager();
+
+ /**
+ * Returns a list of all available plugins for the given category.
+ * Currently there are two categories, "Plugins" and "Editors", but
+ * you can add your own categories if you want.
+ *
+ * If you pass an empty string you get the complete list of ALL plugins.
+ *
+ * You can query all information on the plugins through the @ref KPluginInfo
+ * interface.
+ */
+ TQValueList<KPluginInfo*> availablePlugins( const TQString &category
+ = TQString() ) const;
+
+ /**
+ * Returns a list of all plugins that are actually loaded.
+ * If you omit the category you get all, otherwise it's a filtered list.
+ * See also @ref availablePlugins().
+ */
+ TQMap<KPluginInfo*, Plugin*> loadedPlugins( const TQString &category
+ = TQString() ) const;
+
+ /**
+ * @brief Search by plugin name. This is the key used as X-KDE-PluginInfo-Name
+ * in the .desktop file, e.g. "komposer_attachment"
+ *
+ * @return The @ref Plugin object found by the search, or a null
+ * pointer if the plugin is not loaded.
+ *
+ * If you want to also load the plugin you can better use @ref loadPlugin,
+ * which returns
+ * the pointer to the plugin if it's already loaded.
+ */
+ Plugin* plugin( const TQString &pluginName ) const;
+
+ /**
+ * @brief Return the short user-visible name of the plugin.
+ *
+ * If you want to have the internal name, use @ref pluginId() instead.
+ *
+ * @return The name of the protocol, in the user's locale.
+ */
+ TQString pluginName( const Plugin *plugin ) const;
+
+ /**
+ * @brief Return the internal name of the plugin.
+ *
+ * You cannot display this name on the screen, it's used internally for
+ * passing around IDs. Use @ref pluginName() for a string ready for display.
+ *
+ * @return The name of the protocol, in the user's locale.
+ */
+ TQString pluginId( const Plugin *plugin ) const;
+
+ /**
+ * @brief Unload the plugin specified by @p pluginName
+ */
+ bool unloadPlugin( const TQString &pluginName );
+
+ /**
+ * @brief Retrieve the name of the icon for a @ref Plugin.
+ *
+ * @return An empty string if the given plugin is not loaded
+ * or the filename of the icon to use.
+ */
+ TQString pluginIcon( const Plugin *plugin ) const;
+
+ /**
+ * Shuts down the plugin manager on Komposer shutdown, but first
+ * unloads all plugins asynchronously.
+ *
+ * After 3 seconds all plugins should be removed; what's still left
+ * by then is unloaded through a hard delete instead.
+ *
+ * Note that this call also derefs the plugin manager from the event
+ * loop, so do NOT call this method when not terminating Komposer!
+ */
+ void shutdown();
+
+ /**
+ * Enable a plugin.
+ *
+ * This marks a plugin as enabled in the config file, so loadAll()
+ * can pick it up later.
+ *
+ * This method does not actually load a plugin, it only edits the
+ * config file.
+ *
+ * @param name is the name of the plugin as it is listed in the .desktop
+ * file in the X-KDE-Library field.
+ *
+ * Returns false when no appropriate plugin can be found.
+ */
+ bool setPluginEnabled( const TQString &name, bool enabled = true );
+
+ /**
+ * Plugin loading mode. Used by @loadPlugin. Code that doesn't want to block
+ * the GUI and/or lot a lot of plugins at once should use Async loading.
+ * The default is sync loading.
+ */
+ enum PluginLoadMode { LoadSync, LoadAsync };
+
+ public slots:
+ /**
+ * @brief Load a single plugin by plugin name. Returns an existing plugin
+ * if one is already loaded in memory.
+ *
+ * If mode is set to Async, the plugin will be queued and loaded in
+ * the background. This method will return a null pointer. To get
+ * the loaded plugin you can track the @ref pluginLoaded() signal.
+ *
+ * See also @ref plugin().
+ */
+ Plugin* loadPlugin( const TQString &pluginId, PluginLoadMode mode = LoadSync );
+
+ /**
+ * @brief Loads all the enabled plugins. Also used to reread the
+ * config file when the configuration has changed.
+ */
+ void loadAllPlugins();
+
+ signals:
+ /**
+ * @brief Signals a new plugin has just been loaded.
+ */
+ void pluginLoaded( Plugin *plugin );
+
+ /**
+ * @brief All plugins have been loaded by the plugin manager.
+ *
+ * This signal is emitted exactly ONCE, when the plugin manager has emptied
+ * its plugin queue for the first time. This means that if you call an async
+ * loadPlugin() before loadAllPlugins() this signal is probably emitted after
+ * the initial call completes, unless you are quick enough to fill the queue
+ * before it completes, which is a dangerous race you shouldn't count upon :)
+ *
+ * The signal is delayed one event loop iteration through a singleShot timer,
+ * but that is not guaranteed to be enough for account instantiation. You may
+ * need an additional timer for it in the code if you want to programmatically
+ * act on it.
+ *
+ * If you use the signal for enabling/disabling GUI objects there is little
+ * chance a user is able to activate them in the short while that's remaining,
+ * the slow part of the code is over now and the remaining processing time
+ * is neglectable for the user.
+ */
+ void allPluginsLoaded();
+
+ private slots:
+ /**
+ * @brief Cleans up some references if the plugin is destroyed
+ */
+ void slotPluginDestroyed( TQObject *plugin );
+
+ /**
+ * shutdown() starts a timer, when it fires we force all plugins
+ * to be unloaded here by deref()-ing the event loop to trigger the plugin
+ * manager's destruction
+ */
+ void slotShutdownTimeout();
+
+ /**
+ * Common entry point to deref() the KApplication. Used both by the clean
+ * shutdown and the timeout condition of slotShutdownTimeout()
+ */
+ void slotShutdownDone();
+
+ /**
+ * Emitted by a Plugin when it's ready for unload
+ */
+ void slotPluginReadyForUnload();
+
+ /**
+ * Load a plugin from our queue. Does nothing if the queue is empty.
+ * Schedules itself again if more plugins are pending.
+ */
+ void slotLoadNextPlugin();
+
+ private:
+ /**
+ * @internal
+ *
+ * The internal method for loading plugins.
+ * Called by @ref loadPlugin directly or through the queue for async plugin
+ * loading.
+ */
+ Plugin *loadPluginInternal( const TQString &pluginId );
+
+ /**
+ * @internal
+ *
+ * Find the KPluginInfo structure by key. Reduces some code duplication.
+ *
+ * Returns a null pointer when no plugin info is found.
+ */
+ KPluginInfo *infoForPluginId( const TQString &pluginId ) const;
+ private:
+ class Private;
+ Private *d;
+ };
+
+}
+
+#endif // KOMPOSER_PLUGINMANAGER_H