inicial

1 files changed, 943 insertions, 0 deletions

diff --git a/src/eom-plugin-engine.c b/src/eom-plugin-engine.c
new file mode 100644
index 0000000..09662b5
--- /dev/null
+++ b/src/eom-plugin-engine.c
@@ -0,0 +1,943 @@
+/* Eye Of Mate - EOM Plugin Manager
+ *
+ * Copyright (C) 2007 The Free Software Foundation
+ *
+ * Author: Lucas Rocha <[email protected]>
+ *
+ * Based on gedit code (gedit/gedit-module.c) by:
+ * 	- Paolo Maggi <[email protected]>
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+
+#include "eom-plugin-engine.h"
+#include "eom-plugin.h"
+#include "eom-module.h"
+#include "eom-debug.h"
+#include "eom-application.h"
+#include "eom-config-keys.h"
+#include "eom-util.h"
+
+#include <glib/gi18n.h>
+#include <glib.h>
+#include <mateconf/mateconf-client.h>
+
+#ifdef ENABLE_PYTHON
+#include "eom-python-module.h"
+#endif
+
+#define USER_EOM_PLUGINS_LOCATION "plugins/"
+
+#define EOM_PLUGINS_ENGINE_BASE_KEY "/apps/eom/plugins"
+
+#define PLUGIN_EXT	".eom-plugin"
+
+typedef enum {
+	EOM_PLUGIN_LOADER_C,
+	EOM_PLUGIN_LOADER_PY,
+} EomPluginLoader;
+
+struct _EomPluginInfo
+{
+	gchar             *file;
+
+	gchar             *location;
+	EomPluginLoader    loader;
+	GTypeModule       *module;
+
+	gchar             *name;
+	gchar             *desc;
+	gchar             *icon_name;
+	gchar            **authors;
+	gchar             *copyright;
+	gchar             *website;
+
+	EomPlugin         *plugin;
+
+	gint               active : 1;
+
+	/* A plugin is unavailable if it is not possible to activate it
+	   due to an error loading the plugin module (e.g. for Python plugins
+	   when the interpreter has not been correctly initializated) */
+	gint               available : 1;
+};
+
+static void	eom_plugin_engine_active_plugins_changed (MateConfClient *client,
+							  guint cnxn_id,
+							  MateConfEntry *entry,
+							  gpointer user_data);
+
+static GList *eom_plugins_list = NULL;
+
+static MateConfClient *eom_plugin_engine_mateconf_client = NULL;
+
+static GSList *active_plugins = NULL;
+
+static void
+eom_plugin_info_free (EomPluginInfo *info)
+{
+	if (info->plugin != NULL) {
+	       	eom_debug_message (DEBUG_PLUGINS, "Unref plugin %s", info->name);
+
+		g_object_unref (info->plugin);
+	}
+
+	g_free (info->file);
+	g_free (info->location);
+	g_free (info->name);
+	g_free (info->desc);
+	g_free (info->icon_name);
+	g_free (info->website);
+	g_free (info->copyright);
+	g_strfreev (info->authors);
+
+	g_free (info);
+}
+
+static EomPluginInfo *
+eom_plugin_engine_load (const gchar *file)
+{
+	EomPluginInfo *info;
+	GKeyFile *plugin_file = NULL;
+	gchar *str;
+
+	g_return_val_if_fail (file != NULL, NULL);
+
+	eom_debug_message (DEBUG_PLUGINS, "Loading plugin: %s", file);
+
+	info = g_new0 (EomPluginInfo, 1);
+	info->file = g_strdup (file);
+
+	plugin_file = g_key_file_new ();
+
+	if (!g_key_file_load_from_file (plugin_file, file, G_KEY_FILE_NONE, NULL)) {
+		g_warning ("Bad plugin file: %s", file);
+
+		goto error;
+	}
+
+	if (!g_key_file_has_key (plugin_file,
+			   	 "Eom Plugin",
+				 "IAge",
+				 NULL))	{
+		eom_debug_message (DEBUG_PLUGINS,
+				   "IAge key does not exist in file: %s", file);
+
+		goto error;
+	}
+
+	/* Check IAge=2 */
+	if (g_key_file_get_integer (plugin_file,
+				    "Eom Plugin",
+				    "IAge",
+				    NULL) != 2) {
+		eom_debug_message (DEBUG_PLUGINS,
+				   "Wrong IAge in file: %s", file);
+
+		goto error;
+	}
+
+	/* Get Location */
+	str = g_key_file_get_string (plugin_file,
+				     "Eom Plugin",
+				     "Module",
+				     NULL);
+
+	if ((str != NULL) && (*str != '\0')) {
+		info->location = str;
+	} else {
+		g_warning ("Could not find 'Module' in %s", file);
+
+		goto error;
+	}
+
+	/* Get the loader for this plugin */
+	str = g_key_file_get_string (plugin_file,
+				     "Eom Plugin",
+				     "Loader",
+				     NULL);
+
+	if (str && strcmp(str, "python") == 0) {
+		info->loader = EOM_PLUGIN_LOADER_PY;
+
+#ifndef ENABLE_PYTHON
+		g_warning ("Cannot load Python plugin '%s' since eom was not "
+			   "compiled with Python support.", file);
+
+		goto error;
+#endif
+
+	} else {
+		info->loader = EOM_PLUGIN_LOADER_C;
+	}
+
+	g_free (str);
+
+	/* Get Name */
+	str = g_key_file_get_locale_string (plugin_file,
+					    "Eom Plugin",
+					    "Name",
+					    NULL, NULL);
+	if (str) {
+		info->name = str;
+	} else {
+		g_warning ("Could not find 'Name' in %s", file);
+
+		goto error;
+	}
+
+	/* Get Description */
+	str = g_key_file_get_locale_string (plugin_file,
+					    "Eom Plugin",
+					    "Description",
+					    NULL, NULL);
+	if (str) {
+		info->desc = str;
+	} else {
+		eom_debug_message (DEBUG_PLUGINS, "Could not find 'Description' in %s", file);
+ 	}
+
+	/* Get Icon */
+	str = g_key_file_get_locale_string (plugin_file,
+					    "Eom Plugin",
+					    "Icon",
+					    NULL, NULL);
+	if (str) {
+		info->icon_name = str;
+	} else {
+		eom_debug_message (DEBUG_PLUGINS, "Could not find 'Icon' in %s, "
+						  "using 'eom-plugin'", file);
+	}
+
+	/* Get Authors */
+	info->authors = g_key_file_get_string_list (plugin_file,
+						    "Eom Plugin",
+						    "Authors",
+						    NULL,
+						    NULL);
+
+	if (info->authors == NULL)
+		eom_debug_message (DEBUG_PLUGINS, "Could not find 'Authors' in %s", file);
+
+
+	/* Get Copyright */
+	str = g_key_file_get_string (plugin_file,
+				     "Eom Plugin",
+				     "Copyright",
+				     NULL);
+	if (str) {
+		info->copyright = str;
+	} else {
+		eom_debug_message (DEBUG_PLUGINS, "Could not find 'Copyright' in %s", file);
+	}
+
+	/* Get Website */
+	str = g_key_file_get_string (plugin_file,
+				     "Eom Plugin",
+				     "Website",
+				     NULL);
+	if (str) {
+		info->website = str;
+	} else {
+		eom_debug_message (DEBUG_PLUGINS, "Could not find 'Website' in %s", file);
+	}
+
+	g_key_file_free (plugin_file);
+
+	/* If we know nothing about the availability of the plugin,
+	   set it as available */
+	info->available = TRUE;
+
+	return info;
+
+error:
+	g_free (info->file);
+	g_free (info->location);
+	g_free (info->name);
+	g_free (info);
+	g_key_file_free (plugin_file);
+
+	return NULL;
+}
+
+static gint
+compare_plugin_info (EomPluginInfo *info1,
+		     EomPluginInfo *info2)
+{
+	return strcmp (info1->location, info2->location);
+}
+
+static void
+eom_plugin_engine_load_dir (const gchar *dir)
+{
+	GError *error = NULL;
+	GDir *d;
+	const gchar *dirent;
+
+	if (!g_file_test (dir, G_FILE_TEST_IS_DIR)) {
+		return;
+	}
+
+	g_return_if_fail (eom_plugin_engine_mateconf_client != NULL);
+
+	eom_debug_message (DEBUG_PLUGINS, "DIR: %s", dir);
+
+	d = g_dir_open (dir, 0, &error);
+
+	if (!d)	{
+		g_warning ("%s", error->message);
+		g_error_free (error);
+
+		return;
+	}
+
+	while ((dirent = g_dir_read_name (d))) {
+		if (g_str_has_suffix (dirent, PLUGIN_EXT)) {
+			gchar *plugin_file;
+			EomPluginInfo *info;
+
+			plugin_file = g_build_filename (dir, dirent, NULL);
+			info = eom_plugin_engine_load (plugin_file);
+			g_free (plugin_file);
+
+			if (info == NULL)
+				continue;
+
+			/* If a plugin with this name has already been loaded
+			 * drop this one (user plugins override system plugins) */
+			if (g_list_find_custom (eom_plugins_list,
+						info,
+						(GCompareFunc)compare_plugin_info) != NULL) {
+				g_warning ("Two or more plugins named '%s'. "
+					   "Only the first will be considered.\n",
+					   info->location);
+
+				eom_plugin_info_free (info);
+
+				continue;
+			}
+
+			/* Actually, the plugin will be activated when reactivate_all
+			 * will be called for the first time. */
+			info->active = (g_slist_find_custom (active_plugins,
+							     info->location,
+							     (GCompareFunc)strcmp) != NULL);
+
+			eom_plugins_list = g_list_prepend (eom_plugins_list, info);
+
+			eom_debug_message (DEBUG_PLUGINS, "Plugin %s loaded", info->name);
+		}
+	}
+
+	eom_plugins_list = g_list_reverse (eom_plugins_list);
+
+	g_dir_close (d);
+}
+
+static void
+eom_plugin_engine_load_all (void)
+{
+	gchar *pdir;
+
+	pdir = g_build_filename (eom_util_dot_dir (),
+                                 USER_EOM_PLUGINS_LOCATION, NULL);
+
+	/* Load user's plugins */
+	eom_plugin_engine_load_dir (pdir);
+
+	g_free (pdir);
+
+	/* Load system plugins */
+	eom_plugin_engine_load_dir (EOM_PLUGIN_DIR "/");
+}
+
+gboolean
+eom_plugin_engine_init (void)
+{
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_val_if_fail (eom_plugins_list == NULL, FALSE);
+
+	if (!g_module_supported ()) {
+		g_warning ("eom is not able to initialize the plugins engine.");
+
+		return FALSE;
+	}
+
+	eom_plugin_engine_mateconf_client = mateconf_client_get_default ();
+
+	g_return_val_if_fail (eom_plugin_engine_mateconf_client != NULL, FALSE);
+
+	mateconf_client_add_dir (eom_plugin_engine_mateconf_client,
+			      EOM_PLUGINS_ENGINE_BASE_KEY,
+			      MATECONF_CLIENT_PRELOAD_ONELEVEL,
+			      NULL);
+
+	mateconf_client_notify_add (eom_plugin_engine_mateconf_client,
+				 EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
+				 eom_plugin_engine_active_plugins_changed,
+				 NULL, NULL, NULL);
+
+	active_plugins = mateconf_client_get_list (eom_plugin_engine_mateconf_client,
+						EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
+						MATECONF_VALUE_STRING,
+						NULL);
+
+	eom_plugin_engine_load_all ();
+
+	return TRUE;
+}
+
+void
+eom_plugin_engine_garbage_collect (void)
+{
+#ifdef ENABLE_PYTHON
+	eom_python_garbage_collect ();
+#endif
+}
+
+void
+eom_plugin_engine_shutdown (void)
+{
+	GList *pl;
+
+	eom_debug (DEBUG_PLUGINS);
+
+#ifdef ENABLE_PYTHON
+	/* Note: that this may cause finalization of objects (typically
+	 * the EomWindow) by running the garbage collector. Since some
+	 * of the plugin may have installed callbacks upon object
+	 * finalization (typically they need to free the WindowData)
+	 * it must run before we get rid of the plugins.
+	 */
+	eom_python_shutdown ();
+#endif
+
+	g_return_if_fail (eom_plugin_engine_mateconf_client != NULL);
+
+	for (pl = eom_plugins_list; pl; pl = pl->next) {
+		EomPluginInfo *info = (EomPluginInfo*) pl->data;
+
+		eom_plugin_info_free (info);
+	}
+
+	g_slist_foreach (active_plugins, (GFunc)g_free, NULL);
+	g_slist_free (active_plugins);
+
+	active_plugins = NULL;
+
+	g_list_free (eom_plugins_list);
+	eom_plugins_list = NULL;
+
+	g_object_unref (eom_plugin_engine_mateconf_client);
+	eom_plugin_engine_mateconf_client = NULL;
+}
+
+const GList *
+eom_plugin_engine_get_plugins_list (void)
+{
+	eom_debug (DEBUG_PLUGINS);
+
+	return eom_plugins_list;
+}
+
+static gboolean
+load_plugin_module (EomPluginInfo *info)
+{
+	gchar *path;
+	gchar *dirname;
+
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_val_if_fail (info != NULL, FALSE);
+	g_return_val_if_fail (info->file != NULL, FALSE);
+	g_return_val_if_fail (info->location != NULL, FALSE);
+	g_return_val_if_fail (info->plugin == NULL, FALSE);
+	g_return_val_if_fail (info->available, FALSE);
+
+	switch (info->loader) {
+	case EOM_PLUGIN_LOADER_C:
+		dirname = g_path_get_dirname (info->file);
+		g_return_val_if_fail (dirname != NULL, FALSE);
+
+		path = g_module_build_path (dirname, info->location);
+
+		g_free (dirname);
+
+		g_return_val_if_fail (path != NULL, FALSE);
+
+		info->module = G_TYPE_MODULE (eom_module_new (path));
+
+		g_free (path);
+
+		break;
+
+#ifdef ENABLE_PYTHON
+	case EOM_PLUGIN_LOADER_PY:
+	{
+		gchar *dir;
+
+		if (!eom_python_init ()) {
+			/* Mark plugin as unavailable and fails */
+			info->available = FALSE;
+
+			g_warning ("Cannot load Python plugin '%s' since eom "
+			           "was not able to initialize the Python interpreter.",
+			           info->name);
+
+			return FALSE;
+		}
+
+		dir = g_path_get_dirname (info->file);
+
+		g_return_val_if_fail ((info->location != NULL) &&
+		                      (info->location[0] != '\0'),
+		                      FALSE);
+
+		info->module = G_TYPE_MODULE (
+				eom_python_module_new (dir, info->location));
+
+		g_free (dir);
+
+		break;
+	}
+#endif
+	default:
+		g_return_val_if_reached (FALSE);
+	}
+
+	if (!g_type_module_use (info->module)) {
+		switch (info->loader) {
+		case EOM_PLUGIN_LOADER_C:
+			g_warning ("Cannot load plugin '%s' since file '%s' cannot be read.",
+				   info->name,
+				   eom_module_get_path (EOM_MODULE (info->module)));
+			break;
+
+		case EOM_PLUGIN_LOADER_PY:
+			g_warning ("Cannot load Python plugin '%s' since file '%s' cannot be read.",
+				   info->name,
+				   info->location);
+			break;
+
+		default:
+			g_return_val_if_reached (FALSE);
+		}
+
+		g_object_unref (G_OBJECT (info->module));
+
+		info->module = NULL;
+
+		/* Mark plugin as unavailable and fails */
+		info->available = FALSE;
+
+		return FALSE;
+	}
+
+	switch (info->loader) {
+	case EOM_PLUGIN_LOADER_C:
+		info->plugin =
+			EOM_PLUGIN (eom_module_new_object (EOM_MODULE (info->module)));
+		break;
+
+#ifdef ENABLE_PYTHON
+	case EOM_PLUGIN_LOADER_PY:
+		info->plugin =
+			EOM_PLUGIN (eom_python_module_new_object (EOM_PYTHON_MODULE (info->module)));
+		break;
+#endif
+
+	default:
+		g_return_val_if_reached (FALSE);
+	}
+
+	g_type_module_unuse (info->module);
+
+	eom_debug_message (DEBUG_PLUGINS, "End");
+
+	return TRUE;
+}
+
+static gboolean
+eom_plugin_engine_activate_plugin_real (EomPluginInfo *info)
+{
+	gboolean res = TRUE;
+
+	/* Plugin is not available, don't try to activate/load it */
+	if (!info->available) {
+		return FALSE;
+	}
+
+	if (info->plugin == NULL)
+		res = load_plugin_module (info);
+
+	if (res) {
+		const GList *wins = eom_application_get_windows (EOM_APP);
+
+		while (wins != NULL) {
+			eom_plugin_activate (info->plugin,
+					     EOM_WINDOW (wins->data));
+
+			wins = g_list_next (wins);
+		}
+	} else {
+		g_warning ("Error activating plugin '%s'", info->name);
+	}
+
+	return res;
+}
+
+gboolean
+eom_plugin_engine_activate_plugin (EomPluginInfo *info)
+{
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_val_if_fail (info != NULL, FALSE);
+
+	if (!info->available)
+		return FALSE;
+
+	if (info->active)
+		return TRUE;
+
+	if (eom_plugin_engine_activate_plugin_real (info)) {
+		gboolean res;
+		GSList *list;
+
+		/* Update plugin state */
+		info->active = TRUE;
+
+		list = active_plugins;
+
+		while (list != NULL) {
+			if (strcmp (info->location, (gchar *)list->data) == 0) {
+				g_warning ("Plugin '%s' is already active.", info->name);
+
+				return TRUE;
+			}
+
+			list = g_slist_next (list);
+		}
+
+		active_plugins = g_slist_insert_sorted (active_plugins,
+						        g_strdup (info->location),
+						        (GCompareFunc)strcmp);
+
+		res = mateconf_client_set_list (eom_plugin_engine_mateconf_client,
+		    			     EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
+					     MATECONF_VALUE_STRING,
+					     active_plugins,
+					     NULL);
+
+		if (!res)
+			g_warning ("Error saving the list of active plugins.");
+
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+static void
+eom_plugin_engine_deactivate_plugin_real (EomPluginInfo *info)
+{
+	const GList *wins = eom_application_get_windows (EOM_APP);
+
+	while (wins != NULL) {
+		eom_plugin_deactivate (info->plugin,
+				       EOM_WINDOW (wins->data));
+
+		wins = g_list_next (wins);
+	}
+}
+
+gboolean
+eom_plugin_engine_deactivate_plugin (EomPluginInfo *info)
+{
+	gboolean res;
+	GSList *list;
+
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_val_if_fail (info != NULL, FALSE);
+
+	if (!info->active || !info->available)
+		return TRUE;
+
+	eom_plugin_engine_deactivate_plugin_real (info);
+
+	/* Update plugin state */
+	info->active = FALSE;
+
+	list = active_plugins;
+	res = (list == NULL);
+
+	while (list != NULL) {
+		if (strcmp (info->location, (gchar *)list->data) == 0) {
+			g_free (list->data);
+			active_plugins = g_slist_delete_link (active_plugins, list);
+			list = NULL;
+			res = TRUE;
+		} else {
+			list = g_slist_next (list);
+		}
+	}
+
+	if (!res) {
+		g_warning ("Plugin '%s' is already deactivated.", info->name);
+
+		return TRUE;
+	}
+
+	res = mateconf_client_set_list (eom_plugin_engine_mateconf_client,
+	    			     EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
+				     MATECONF_VALUE_STRING,
+				     active_plugins,
+				     NULL);
+
+	if (!res)
+		g_warning ("Error saving the list of active plugins.");
+
+	return TRUE;
+}
+
+gboolean
+eom_plugin_engine_plugin_is_active (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, FALSE);
+
+	return (info->available && info->active);
+}
+
+gboolean
+eom_plugin_engine_plugin_is_available (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, FALSE);
+
+	return (info->available != FALSE);
+}
+
+static void
+reactivate_all (EomWindow *window)
+{
+	GList *pl;
+
+	eom_debug (DEBUG_PLUGINS);
+
+	for (pl = eom_plugins_list; pl; pl = pl->next) {
+		gboolean res = TRUE;
+
+		EomPluginInfo *info = (EomPluginInfo*)pl->data;
+
+		/* If plugin is not available, don't try to activate/load it */
+		if (info->available && info->active) {
+			if (info->plugin == NULL)
+				res = load_plugin_module (info);
+
+			if (res)
+				eom_plugin_activate (info->plugin,
+						     window);
+		}
+	}
+
+	eom_debug_message (DEBUG_PLUGINS, "End");
+}
+
+void
+eom_plugin_engine_update_plugins_ui (EomWindow *window,
+				     gboolean   new_window)
+{
+	GList *pl;
+
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_if_fail (EOM_IS_WINDOW (window));
+
+	if (new_window)
+		reactivate_all (window);
+
+	/* Updated ui of all the plugins that implement update_ui */
+	for (pl = eom_plugins_list; pl; pl = pl->next) {
+		EomPluginInfo *info = (EomPluginInfo*)pl->data;
+
+		if (!info->available || !info->active)
+			continue;
+
+	       	eom_debug_message (DEBUG_PLUGINS, "Updating UI of %s", info->name);
+
+		eom_plugin_update_ui (info->plugin, window);
+	}
+}
+
+gboolean
+eom_plugin_engine_plugin_is_configurable (EomPluginInfo *info) {
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_val_if_fail (info != NULL, FALSE);
+
+	if ((info->plugin == NULL) || !info->active || !info->available)
+		return FALSE;
+
+	return eom_plugin_is_configurable (info->plugin);
+}
+
+void
+eom_plugin_engine_configure_plugin (EomPluginInfo *info,
+				    GtkWindow     *parent)
+{
+	GtkWidget *conf_dlg;
+
+	GtkWindowGroup *wg;
+
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_if_fail (info != NULL);
+
+	conf_dlg = eom_plugin_create_configure_dialog (info->plugin);
+
+	g_return_if_fail (conf_dlg != NULL);
+
+	gtk_window_set_transient_for (GTK_WINDOW (conf_dlg),
+				      parent);
+
+	// Will return a default group if no group is set
+	wg = gtk_window_get_group (parent);
+
+	// For now assign a dedicated window group if it is 
+	// the default one until we know if this is really needed
+	if (wg == gtk_window_get_group (NULL)) {
+		wg = gtk_window_group_new ();
+		gtk_window_group_add_window (wg, parent);
+	}
+
+	gtk_window_group_add_window (wg,
+				     GTK_WINDOW (conf_dlg));
+
+	gtk_window_set_modal (GTK_WINDOW (conf_dlg), TRUE);
+
+	gtk_widget_show (conf_dlg);
+}
+
+static void
+eom_plugin_engine_active_plugins_changed (MateConfClient *client,
+					  guint cnxn_id,
+					  MateConfEntry *entry,
+					  gpointer user_data)
+{
+	GList *pl;
+	gboolean to_activate;
+
+	eom_debug (DEBUG_PLUGINS);
+
+	g_return_if_fail (entry->key != NULL);
+	g_return_if_fail (entry->value != NULL);
+
+	if (!((entry->value->type == MATECONF_VALUE_LIST) &&
+	      (mateconf_value_get_list_type (entry->value) == MATECONF_VALUE_STRING))) {
+		g_warning ("The mateconf key '%s' may be corrupted.", EOM_CONF_PLUGINS_ACTIVE_PLUGINS);
+		return;
+	}
+
+	active_plugins = mateconf_client_get_list (eom_plugin_engine_mateconf_client,
+						EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
+						MATECONF_VALUE_STRING,
+						NULL);
+
+	for (pl = eom_plugins_list; pl; pl = pl->next) {
+		EomPluginInfo *info = (EomPluginInfo*)pl->data;
+
+		if (!info->available)
+			continue;
+
+		to_activate = (g_slist_find_custom (active_plugins,
+						    info->location,
+						    (GCompareFunc)strcmp) != NULL);
+
+		if (!info->active && to_activate) {
+			/* Activate plugin */
+			if (eom_plugin_engine_activate_plugin_real (info))
+				/* Update plugin state */
+				info->active = TRUE;
+		} else {
+			if (info->active && !to_activate) {
+				eom_plugin_engine_deactivate_plugin_real (info);
+
+				/* Update plugin state */
+				info->active = FALSE;
+			}
+		}
+	}
+}
+
+const gchar *
+eom_plugin_engine_get_plugin_name (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, NULL);
+
+	return info->name;
+}
+
+const gchar *
+eom_plugin_engine_get_plugin_description (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, NULL);
+
+	return info->desc;
+}
+
+const gchar *
+eom_plugin_engine_get_plugin_icon_name (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, NULL);
+
+	/* Use the eom-plugin icon as a default if the plugin does not
+	   have its own */
+	if (info->icon_name != NULL &&
+	    gtk_icon_theme_has_icon (gtk_icon_theme_get_default (),
+	    			     info->icon_name))
+		return info->icon_name;
+	else
+		return "eom-plugin";
+}
+
+const gchar **
+eom_plugin_engine_get_plugin_authors (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, (const gchar **)NULL);
+
+	return (const gchar **) info->authors;
+}
+
+const gchar *
+eom_plugin_engine_get_plugin_website (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, NULL);
+
+	return info->website;
+}
+
+const gchar *
+eom_plugin_engine_get_plugin_copyright (EomPluginInfo *info)
+{
+	g_return_val_if_fail (info != NULL, NULL);
+
+	return info->copyright;
+}