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plugin-loaders/c/gedit-plugin-loader-c.c

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+/*
+ * gedit-plugin-loader-c.c
+ * This file is part of gedit
+ *
+ * Copyright (C) 2008 - Jesse van den Kieboom
+ *
+ * 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.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, 
+ * Boston, MA 02111-1307, USA. 
+ */
+
+#include "gedit-plugin-loader-c.h"
+#include <gedit/gedit-object-module.h>
+
+#define GEDIT_PLUGIN_LOADER_C_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE((object), GEDIT_TYPE_PLUGIN_LOADER_C, GeditPluginLoaderCPrivate))
+
+struct _GeditPluginLoaderCPrivate
+{
+	GHashTable *loaded_plugins;
+};
+
+static void gedit_plugin_loader_iface_init (gpointer g_iface, gpointer iface_data);
+
+GEDIT_PLUGIN_LOADER_REGISTER_TYPE (GeditPluginLoaderC, gedit_plugin_loader_c, G_TYPE_OBJECT, gedit_plugin_loader_iface_init);
+
+
+static const gchar *
+gedit_plugin_loader_iface_get_id (void)
+{
+	return "C";
+}
+
+static GeditPlugin *
+gedit_plugin_loader_iface_load (GeditPluginLoader *loader,
+				GeditPluginInfo   *info,
+				const gchar       *path)
+{
+	GeditPluginLoaderC *cloader = GEDIT_PLUGIN_LOADER_C (loader);
+	GeditObjectModule *module;
+	const gchar *module_name;
+	GeditPlugin *result;
+
+	module = (GeditObjectModule *)g_hash_table_lookup (cloader->priv->loaded_plugins, info);
+	module_name = gedit_plugin_info_get_module_name (info);
+
+	if (module == NULL)
+	{
+		/* For now we force all modules to be resident */
+		module = gedit_object_module_new (module_name,
+						  path,
+						  "register_gedit_plugin",
+						  TRUE);
+
+		/* Infos are available for all the lifetime of the loader.
+		 * If this changes, we should use weak refs or something */
+
+		g_hash_table_insert (cloader->priv->loaded_plugins, info, module);
+	}
+
+	if (!g_type_module_use (G_TYPE_MODULE (module)))
+	{
+		g_warning ("Could not load plugin module: %s", gedit_plugin_info_get_name (info));
+
+		return NULL;
+	}
+
+	/* TODO: for now we force data-dir-name = module-name... if needed we can
+	 * add a datadir field to the plugin descriptor file.
+	 */
+	result = (GeditPlugin *)gedit_object_module_new_object (module,
+								"install-dir", path,
+								"data-dir-name", module_name,
+								NULL);
+
+	if (!result)
+	{
+		g_warning ("Could not create plugin object: %s", gedit_plugin_info_get_name (info));
+		g_type_module_unuse (G_TYPE_MODULE (module));
+		
+		return NULL;
+	}
+
+	g_type_module_unuse (G_TYPE_MODULE (module));
+	
+	return result;
+}
+
+static void
+gedit_plugin_loader_iface_unload (GeditPluginLoader *loader,
+				  GeditPluginInfo   *info)
+{
+	//GeditPluginLoaderC *cloader = GEDIT_PLUGIN_LOADER_C (loader);
+	
+	/* this is a no-op, since the type module will be properly unused as
+	   the last reference to the plugin dies. When the plugin is activated
+	   again, the library will be reloaded */
+}
+
+static void
+gedit_plugin_loader_iface_init (gpointer g_iface, 
+				gpointer iface_data)
+{
+	GeditPluginLoaderInterface *iface = (GeditPluginLoaderInterface *)g_iface;
+	
+	iface->get_id = gedit_plugin_loader_iface_get_id;
+	iface->load = gedit_plugin_loader_iface_load;
+	iface->unload = gedit_plugin_loader_iface_unload;
+}
+
+static void
+gedit_plugin_loader_c_finalize (GObject *object)
+{
+	GeditPluginLoaderC *cloader = GEDIT_PLUGIN_LOADER_C (object);
+	GList *infos;
+	GList *item;
+
+	/* FIXME: this sanity check it's not efficient. Let's remove it
+	 * once we are confident with the code */
+
+	infos = g_hash_table_get_keys (cloader->priv->loaded_plugins);
+	
+	for (item = infos; item; item = item->next)
+	{
+		GeditPluginInfo *info = (GeditPluginInfo *)item->data;
+
+		if (gedit_plugin_info_is_active (info))
+		{
+			g_warning ("There are still C plugins loaded during destruction");
+			break;
+		}
+	}
+
+	g_list_free (infos);	
+
+	g_hash_table_destroy (cloader->priv->loaded_plugins);
+	
+	G_OBJECT_CLASS (gedit_plugin_loader_c_parent_class)->finalize (object);
+}
+
+static void
+gedit_plugin_loader_c_class_init (GeditPluginLoaderCClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+	
+	object_class->finalize = gedit_plugin_loader_c_finalize;
+
+	g_type_class_add_private (object_class, sizeof (GeditPluginLoaderCPrivate));
+}
+
+static void
+gedit_plugin_loader_c_class_finalize (GeditPluginLoaderCClass *klass)
+{
+}
+
+static void
+gedit_plugin_loader_c_init (GeditPluginLoaderC *self)
+{
+	self->priv = GEDIT_PLUGIN_LOADER_C_GET_PRIVATE (self);
+	
+	/* loaded_plugins maps GeditPluginInfo to a GeditObjectModule */
+	self->priv->loaded_plugins = g_hash_table_new (g_direct_hash,
+						       g_direct_equal);
+}
+
+GeditPluginLoaderC *
+gedit_plugin_loader_c_new ()
+{
+	GObject *loader = g_object_new (GEDIT_TYPE_PLUGIN_LOADER_C, NULL);
+
+	return GEDIT_PLUGIN_LOADER_C (loader);
+}