port plugin system to libpeas

backported from eog with a few changes

upstream commits for reference:
https://git.gnome.org/browse/eog/commit/?id=1f79c321367c91c8e9063f1343a7e4ce4199c4d5
https://git.gnome.org/browse/eog/commit/?id=9afc5483b615039a580e295fe08d7b8ec524759c
https://git.gnome.org/browse/eog/commit/?id=40bedbf33812e65f4a8e79691b1fadfaace94035
https://git.gnome.org/browse/eog/commit/?id=8b0acfddc52c220393770a9895b6b56cab7821fd
https://git.gnome.org/browse/eog/commit/?id=95694f8b5f06b891a5e55356451ad60b53387563
https://git.gnome.org/browse/eog/commit/?id=7eeb6c8c0e55a3ad954cde4a6fed91ea7f89691c

9 files changed, 149 insertions, 845 deletions

diff --git a/configure.ac b/configure.ac
index 90f53c5..c3c907d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -97,6 +97,7 @@ MATE_DESKTOP_REQUIRED=1.17.0
 GDKPIXBUF_REQUIRED=2.30.0
 SHARED_MIME_INFO_REQUIRED=0.20
 EXEMPI_REQUIRED=1.99.5
+LIBPEAS_REQUIRED=1.2.0
 
 PKG_CHECK_MODULES(GMODULE, gmodule-2.0, [GMODULE_ADD="gmodule-2.0"],[GMODULE_ADD=""])
 EOM_MODULES="gtk+-3.0 >= $GTK_REQUIRED \
@@ -109,7 +110,9 @@ EOM_MODULES="gtk+-3.0 >= $GTK_REQUIRED \
              gdk-pixbuf-2.0 >= $GDKPIXBUF_REQUIRED \
              gio-2.0 >= $GIO_REQUIRED \
              gtk+-unix-print-3.0 >= $GTK_REQUIRED \
-             shared-mime-info >= $SHARED_MIME_INFO_REQUIRED"
+             shared-mime-info >= $SHARED_MIME_INFO_REQUIRED \
+             libpeas-1.0 >= $LIBPEAS_REQUIRED \
+             libpeas-gtk-1.0 >= $LIBPEAS_REQUIRED"
 
 # Introspection
 GOBJECT_INTROSPECTION_CHECK([0.9.3])
diff --git a/src/Makefile.am b/src/Makefile.am
index 1a09b57..c42c0de 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -33,8 +33,6 @@ NOINST_H_FILES =			\
 	eom-print-image-setup.h         \
 	eom-print-preview.h             \
 	eom-print.h			\
-	eom-module.h             	\
-	eom-plugin-manager.h            \
 	eom-plugin-engine.h             \
 	eom-close-confirmation-dialog.h	\
 	zoom.h
@@ -60,8 +58,7 @@ INST_H_FILES =				\
 	eom-thumbnail.h			\
 	eom-job-queue.h			\
 	eom-clipboard-handler.h		\
-	eom-jobs.h			\
-	eom-plugin.h
+	eom-jobs.h
 
 libeom_c_files =			\
 	eom-application.c		\
@@ -96,10 +93,7 @@ libeom_c_files =			\
 	eom-print-image-setup.c         \
 	eom-print-preview.c           	\
 	eom-print.c			\
-	eom-module.c            	\
 	eom-close-confirmation-dialog.c \
-	eom-plugin.c            	\
-	eom-plugin-manager.c            \
 	eom-plugin-engine.c            	\
 	eom-clipboard-handler.c		\
 	zoom.c
@@ -138,7 +132,8 @@ libeom_la_CPPFLAGS =						\
 	-DG_LOG_DOMAIN=\"EOM\"					\
 	-DEOM_DATA_DIR=\""$(pkgdatadir)"\"			\
 	-DEOM_LOCALE_DIR=\""$(datadir)/locale"\"		\
-	-DEOM_PLUGIN_DIR=\""$(libdir)/eom/plugins"\"
+	-DEOM_PLUGIN_DIR=\""$(libdir)/eom/plugins"\"		\
+	-DLIBDIR=\""$(libdir)"\"
 
 libeom_la_CFLAGS =						\
 	$(EOM_CFLAGS)						\
diff --git a/src/eom-application.c b/src/eom-application.c
index c5bdf05..1515d70 100644
--- a/src/eom-application.c
+++ b/src/eom-application.c
@@ -140,6 +140,8 @@ eom_application_init (EomApplication *eom_application)
 
 	eom_session_init (eom_application);
 
+	eom_application->plugin_engine = eom_plugin_engine_new ();
+
 	eom_application->toolbars_model = egg_toolbars_model_new ();
 
 	egg_toolbars_model_load_names (eom_application->toolbars_model,
@@ -434,6 +436,11 @@ eom_application_shutdown (EomApplication *application)
 		application->toolbars_file = NULL;
 	}
 
+	if (application->plugin_engine) {
+		g_object_unref (application->plugin_engine);
+		application->plugin_engine = NULL;
+	}
+
 	eom_application_save_accelerators ();
 
 	g_object_unref (application);
diff --git a/src/eom-application.h b/src/eom-application.h
index fcee3b6..dcf4cb8 100644
--- a/src/eom-application.h
+++ b/src/eom-application.h
@@ -26,6 +26,7 @@
 #define __EOM_APPLICATION_H__
 
 #include "eom-window.h"
+#include "eom-plugin-engine.h"
 #include "egg-toolbars-model.h"
 
 #ifdef HAVE_DBUS
@@ -55,6 +56,9 @@ struct _EomApplication {
 
 	EggToolbarsModel *toolbars_model;
 	gchar            *toolbars_file;
+
+	EomPluginEngine  *plugin_engine;
+
 #ifdef HAVE_DBUS
 	TotemScrsaver    *scr_saver;
 #endif
diff --git a/src/eom-plugin-engine.c b/src/eom-plugin-engine.c
index b55b0d0..0c55731 100644
--- a/src/eom-plugin-engine.c
+++ b/src/eom-plugin-engine.c
@@ -26,833 +26,116 @@
 #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 <gio/gio.h>
+#include <girepository.h>
 
 #define USER_EOM_PLUGINS_LOCATION "plugins/"
 
-#define PLUGIN_EXT	".eom-plugin"
-
-typedef enum {
-	EOM_PLUGIN_LOADER_C,
-} EomPluginLoader;
-
-struct _EomPluginInfo
-{
-	gchar             *file;
-
-	gchar             *location;
-	EomPluginLoader    loader;
-	GTypeModule       *module;
+G_DEFINE_TYPE (EomPluginEngine, eom_plugin_engine, PEAS_TYPE_ENGINE)
 
-	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 */
-	gint               available : 1;
+struct _EomPluginEnginePrivate {
+	GSettings *plugins_settings;
 };
 
-static void	eom_plugin_engine_active_plugins_changed (GSettings *settings,
-							  gchar *key,
-							  gpointer user_data);
-
-static GList *eom_plugins_list = NULL;
-
-static GSettings *eom_plugin_engine_settings = 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);
-
-	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_settings != 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 "/");
-}
-
-static void
-eom_plugin_engine_get_active_plugins (void)
-{
-	gchar **array;
-	gint i;
-
-	active_plugins = NULL;
-	array = g_settings_get_strv (eom_plugin_engine_settings, EOM_CONF_PLUGINS_ACTIVE_PLUGINS);
-	if (array != NULL) {
-		for (i = 0; array[i]; i++) {
-			active_plugins = g_slist_append (active_plugins, g_strdup (array[i]));
-		}
-	}
-	g_strfreev (array);
-}
-
-gboolean
-eom_plugin_engine_init (void)
+eom_plugin_engine_init (EomPluginEngine *engine)
 {
 	eom_debug (DEBUG_PLUGINS);
 
-	g_return_val_if_fail (eom_plugins_list == NULL, FALSE);
+	engine->priv = G_TYPE_INSTANCE_GET_PRIVATE (engine,
+	                                            EOM_TYPE_PLUGIN_ENGINE,
+	                                            EomPluginEnginePrivate);
 
-	if (!g_module_supported ()) {
-		g_warning ("eom is not able to initialize the plugins engine.");
-
-		return FALSE;
-	}
-
-	eom_plugin_engine_settings = g_settings_new (EOM_CONF_PLUGINS);
-
-	g_signal_connect (eom_plugin_engine_settings,
-			  "changed::" EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
-			  G_CALLBACK (eom_plugin_engine_active_plugins_changed),
-			  NULL);
-
-	eom_plugin_engine_get_active_plugins ();
-
-	eom_plugin_engine_load_all ();
-
-	return TRUE;
-}
-
-void
-eom_plugin_engine_shutdown (void)
-{
-	GList *pl;
-
-	eom_debug (DEBUG_PLUGINS);
-
-	g_return_if_fail (eom_plugin_engine_settings != 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_settings);
-	eom_plugin_engine_settings = 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;
-
-	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;
-
-		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;
-
-	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)) {
-		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);
-
-		GArray *array;
-		GSList *l;
-		array = g_array_new (TRUE, TRUE, sizeof (gchar *));
-		for (l = active_plugins; l; l = l->next) {
-			array = g_array_append_val (array, l->data);
-		}
-		g_settings_set_strv (eom_plugin_engine_settings, EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
-				(const gchar **) array->data);
-		g_array_free (array, TRUE);
-
-		return TRUE;
-	}
-
-	return FALSE;
+	engine->priv->plugins_settings = g_settings_new (EOM_CONF_PLUGINS);
 }
 
 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)
+eom_plugin_engine_dispose (GObject *object)
 {
-	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;
+	EomPluginEngine *engine = EOM_PLUGIN_ENGINE (object);
 
-	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;
+	if (engine->priv->plugins_settings != NULL)
+	{
+		g_object_unref (engine->priv->plugins_settings);
+		engine->priv->plugins_settings = NULL;
 	}
 
-	GArray *array;
-	GSList *l;
-	array = g_array_new (TRUE, TRUE, sizeof (gchar *));
-	for (l = active_plugins; l; l = l->next) {
-		array = g_array_append_val (array, l->data);
-	}
-	g_settings_set_strv (eom_plugin_engine_settings, EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
-			(const gchar **) array->data);
-	g_array_free (array, TRUE);
-
-	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);
+	G_OBJECT_CLASS (eom_plugin_engine_parent_class)->dispose (object);
 }
 
 static void
-reactivate_all (EomWindow *window)
+eom_plugin_engine_class_init (EomPluginEngineClass *klass)
 {
-	GList *pl;
-
-	eom_debug (DEBUG_PLUGINS);
-
-	for (pl = eom_plugins_list; pl; pl = pl->next) {
-		gboolean res = TRUE;
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
 
-		EomPluginInfo *info = (EomPluginInfo*)pl->data;
+	object_class->dispose = eom_plugin_engine_dispose;
 
-		/* 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");
+	g_type_class_add_private (klass, sizeof (EomPluginEnginePrivate));
 }
 
-void
-eom_plugin_engine_update_plugins_ui (EomWindow *window,
-				     gboolean   new_window)
+EomPluginEngine *
+eom_plugin_engine_new (void)
 {
-	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;
+	EomPluginEngine *engine;
+	gchar *user_plugin_path;
+	gchar *private_path;
+	GError *error = NULL;
 
-	       	eom_debug_message (DEBUG_PLUGINS, "Updating UI of %s", info->name);
+	private_path = g_build_filename (LIBDIR, "girepository-1.0", NULL);
 
-		eom_plugin_update_ui (info->plugin, window);
+	/* This should be moved to libpeas */
+	if (g_irepository_require (g_irepository_get_default (),
+	                           "Peas", "1.0", 0, &error) == NULL)
+	{
+		g_warning ("Error loading Peas typelib: %s\n",
+		           error->message);
+		g_clear_error (&error);
 	}
-}
-
-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);
+	if (g_irepository_require (g_irepository_get_default (),
+	                           "PeasGtk", "1.0", 0, &error) == NULL)
+	{
+		g_warning ("Error loading PeasGtk typelib: %s\n",
+		           error->message);
+		g_clear_error (&error);
 	}
 
-	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 (GSettings *settings,
-					  gchar *key,
-					  gpointer user_data)
-{
-	GList *pl;
-	gboolean to_activate;
-
-	eom_debug (DEBUG_PLUGINS);
-
-	g_return_if_fail (settings != NULL);
-	g_return_if_fail (key != NULL);
-
-	eom_plugin_engine_get_active_plugins ();
-
-	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;
-			}
-		}
+	if (g_irepository_require_private (g_irepository_get_default (),
+	                                   private_path, "Eom", "1.0", 0,
+	                                   &error) == NULL)
+	{
+		g_warning ("Error loading Eom typelib: %s\n",
+		           error->message);
+		g_clear_error (&error);
 	}
-}
-
-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);
+	g_free (private_path);
 
-	/* 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";
-}
+	engine = EOM_PLUGIN_ENGINE (g_object_new (EOM_TYPE_PLUGIN_ENGINE, NULL));
 
-const gchar **
-eom_plugin_engine_get_plugin_authors (EomPluginInfo *info)
-{
-	g_return_val_if_fail (info != NULL, (const gchar **)NULL);
+	user_plugin_path = g_build_filename (eom_util_dot_dir (),
+	                                     USER_EOM_PLUGINS_LOCATION, NULL);
 
-	return (const gchar **) info->authors;
-}
+	peas_engine_add_search_path (PEAS_ENGINE (engine),
+	                             user_plugin_path, user_plugin_path);
 
-const gchar *
-eom_plugin_engine_get_plugin_website (EomPluginInfo *info)
-{
-	g_return_val_if_fail (info != NULL, NULL);
+	peas_engine_add_search_path (PEAS_ENGINE (engine),
+	                             EOM_PLUGIN_DIR, EOM_PLUGIN_DIR);
 
-	return info->website;
-}
+	g_settings_bind (engine->priv->plugins_settings,
+	                 EOM_CONF_PLUGINS_ACTIVE_PLUGINS,
+	                 engine,
+	                 "loaded-plugins",
+	                 G_SETTINGS_BIND_DEFAULT);
 
-const gchar *
-eom_plugin_engine_get_plugin_copyright (EomPluginInfo *info)
-{
-	g_return_val_if_fail (info != NULL, NULL);
+	g_free (user_plugin_path);
 
-	return info->copyright;
+	return engine;
 }
diff --git a/src/eom-plugin-engine.h b/src/eom-plugin-engine.h
index 67088b3..8c1d092 100644
--- a/src/eom-plugin-engine.h
+++ b/src/eom-plugin-engine.h
@@ -25,62 +25,35 @@
 #ifndef __EOM_PLUGIN_ENGINE_H__
 #define __EOM_PLUGIN_ENGINE_H__
 
-#include "eom-window.h"
-
 #include <glib.h>
+#include <libpeas/peas-engine.h>
 
-typedef struct _EomPluginInfo EomPluginInfo;
-
-G_GNUC_INTERNAL
-gboolean	 eom_plugin_engine_init 		(void);
-
-G_GNUC_INTERNAL
-void		 eom_plugin_engine_shutdown 		(void);
-
-G_GNUC_INTERNAL
-const GList	*eom_plugin_engine_get_plugins_list 	(void);
-
-G_GNUC_INTERNAL
-gboolean 	 eom_plugin_engine_activate_plugin 	(EomPluginInfo *info);
-
-G_GNUC_INTERNAL
-gboolean 	 eom_plugin_engine_deactivate_plugin	(EomPluginInfo *info);
-
-G_GNUC_INTERNAL
-gboolean 	 eom_plugin_engine_plugin_is_active 	(EomPluginInfo *info);
-
-G_GNUC_INTERNAL
-gboolean 	 eom_plugin_engine_plugin_is_available	(EomPluginInfo *info);
-
-G_GNUC_INTERNAL
-gboolean	 eom_plugin_engine_plugin_is_configurable
-			       				(EomPluginInfo *info);
-
-G_GNUC_INTERNAL
-void	 	 eom_plugin_engine_configure_plugin	(EomPluginInfo *info,
-			       			 	 GtkWindow     *parent);
+G_BEGIN_DECLS
 
-G_GNUC_INTERNAL
-void		 eom_plugin_engine_update_plugins_ui	(EomWindow     *window,
-			       			 	 gboolean       new_window);
+typedef struct _EomPluginEngine EomPluginEngine;
+typedef struct _EomPluginEngineClass EomPluginEngineClass;
+typedef struct _EomPluginEnginePrivate EomPluginEnginePrivate;
 
-G_GNUC_INTERNAL
-const gchar	*eom_plugin_engine_get_plugin_name	(EomPluginInfo *info);
+#define EOM_TYPE_PLUGIN_ENGINE            eom_plugin_engine_get_type()
+#define EOM_PLUGIN_ENGINE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), EOM_TYPE_PLUGIN_ENGINE, EomPluginEngine))
+#define EOM_PLUGIN_ENGINE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EOM_TYPE_PLUGIN_ENGINE, EomPluginEngineClass))
+#define EOM_IS_PLUGIN_ENGINE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EOM_TYPE_PLUGIN_ENGINE))
+#define EOM_IS_PLUGIN_ENGINE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EOM_TYPE_PLUGIN_ENGINE))
+#define EOM_PLUGIN_ENGINE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EOM_TYPE_PLUGIN_ENGINE, EomPluginEngineClass))
 
-G_GNUC_INTERNAL
-const gchar	*eom_plugin_engine_get_plugin_description
-			       				(EomPluginInfo *info);
+struct _EomPluginEngine {
+	PeasEngine parent;
+	EomPluginEnginePrivate *priv;
+};
 
-G_GNUC_INTERNAL
-const gchar	*eom_plugin_engine_get_plugin_icon_name (EomPluginInfo *info);
+struct _EomPluginEngineClass {
+	PeasEngineClass parent_class;
+};
 
-G_GNUC_INTERNAL
-const gchar    **eom_plugin_engine_get_plugin_authors   (EomPluginInfo *info);
+GType eom_plugin_engine_get_type (void) G_GNUC_CONST;
 
-G_GNUC_INTERNAL
-const gchar	*eom_plugin_engine_get_plugin_website   (EomPluginInfo *info);
+EomPluginEngine* eom_plugin_engine_new (void);
 
-G_GNUC_INTERNAL
-const gchar	*eom_plugin_engine_get_plugin_copyright (EomPluginInfo *info);
+G_END_DECLS
 
 #endif  /* __EOM_PLUGIN_ENGINE_H__ */
diff --git a/src/eom-preferences-dialog.c b/src/eom-preferences-dialog.c
index 59cd042..24596d3 100644
--- a/src/eom-preferences-dialog.c
+++ b/src/eom-preferences-dialog.c
@@ -27,7 +27,6 @@
 #endif
 
 #include "eom-preferences-dialog.h"
-#include "eom-plugin-manager.h"
 #include "eom-scroll-view.h"
 #include "eom-util.h"
 #include "eom-config-keys.h"
@@ -37,6 +36,7 @@
 #include <glib-object.h>
 #include <gtk/gtk.h>
 #include <gio/gio.h>
+#include <libpeas-gtk/peas-gtk-plugin-manager.h>
 
 #define EOM_PREFERENCES_DIALOG_GET_PRIVATE(object) \
 	(G_TYPE_INSTANCE_GET_PRIVATE ((object), EOM_TYPE_PREFERENCES_DIALOG, EomPreferencesDialogPrivate))
@@ -297,7 +297,7 @@ eom_preferences_dialog_constructor (GType type,
 					 "value",
 					 G_SETTINGS_BIND_DEFAULT);
 
-	plugin_manager = eom_plugin_manager_new ();
+	plugin_manager = peas_gtk_plugin_manager_new (NULL);
 
 	g_assert (plugin_manager != NULL);
 
diff --git a/src/eom-window.c b/src/eom-window.c
index 5c022f4..72400d5 100644
--- a/src/eom-window.c
+++ b/src/eom-window.c
@@ -50,7 +50,6 @@
 #include "eom-jobs.h"
 #include "eom-util.h"
 #include "eom-save-as-dialog-helper.h"
-#include "eom-plugin-engine.h"
 #include "eom-close-confirmation-dialog.h"
 #include "eom-clipboard-handler.h"
 
@@ -68,6 +67,9 @@
 #include <gio/gdesktopappinfo.h>
 #include <gtk/gtk.h>
 
+#include <libpeas/peas-extension-set.h>
+#include <libpeas/peas-activatable.h>
+
 #if HAVE_LCMS
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
@@ -185,6 +187,8 @@ struct _EomWindowPrivate {
 
 	GtkPageSetup        *page_setup;
 
+	PeasExtensionSet    *extensions;
+
 #ifdef HAVE_LCMS
 	cmsHPROFILE         *display_profile;
 #endif
@@ -4562,6 +4566,14 @@ eom_window_dispose (GObject *object)
 	window = EOM_WINDOW (object);
 	priv = window->priv;
 
+	peas_engine_garbage_collect (PEAS_ENGINE (EOM_APP->plugin_engine));
+
+	if (priv->extensions != NULL) {
+		g_object_unref (priv->extensions);
+		priv->extensions = NULL;
+		peas_engine_garbage_collect (PEAS_ENGINE (EOM_APP->plugin_engine));
+	}
+
 	if (priv->page_setup != NULL) {
 		g_object_unref (priv->page_setup);
 		priv->page_setup = NULL;
@@ -4678,6 +4690,8 @@ eom_window_dispose (GObject *object)
 		priv->last_save_as_folder = NULL;
 	}
 
+	peas_engine_garbage_collect (PEAS_ENGINE (EOM_APP->plugin_engine));
+
 	G_OBJECT_CLASS (eom_window_parent_class)->dispose (object);
 }
 
@@ -4999,19 +5013,49 @@ eom_window_get_property (GObject    *object,
 	}
 }
 
+static void
+on_extension_added (PeasExtensionSet *set,
+		    PeasPluginInfo   *info,
+		    PeasExtension    *exten,
+		    GtkWindow        *window)
+{
+	peas_extension_call (exten, "activate", window);
+}
+
+static void
+on_extension_removed (PeasExtensionSet *set,
+		      PeasPluginInfo   *info,
+		      PeasExtension    *exten,
+		      GtkWindow        *window)
+{
+	peas_extension_call (exten, "deactivate", window);
+}
+
 static GObject *
 eom_window_constructor (GType type,
 			guint n_construct_properties,
 			GObjectConstructParam *construct_params)
 {
 	GObject *object;
+	EomWindowPrivate *priv;
 
 	object = G_OBJECT_CLASS (eom_window_parent_class)->constructor
 			(type, n_construct_properties, construct_params);
 
+	priv = EOM_WINDOW (object)->priv;
+
 	eom_window_construct_ui (EOM_WINDOW (object));
 
-	eom_plugin_engine_update_plugins_ui (EOM_WINDOW (object), TRUE);
+	priv->extensions = peas_extension_set_new (PEAS_ENGINE (EOM_APP->plugin_engine),
+						   PEAS_TYPE_ACTIVATABLE,
+						   "object", object, NULL);
+
+	peas_extension_set_call (priv->extensions, "activate");
+
+	g_signal_connect (priv->extensions, "extension-added",
+			  G_CALLBACK (on_extension_added), object);
+	g_signal_connect (priv->extensions, "extension-removed",
+			  G_CALLBACK (on_extension_removed), object);
 
 	return object;
 }
diff --git a/src/main.c b/src/main.c
index 6638054..18049d8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -39,7 +39,6 @@
 #include "eom-thumbnail.h"
 #include "eom-job-queue.h"
 #include "eom-application.h"
-#include "eom-plugin-engine.h"
 #include "eom-util.h"
 
 #include <string.h>
@@ -255,8 +254,6 @@ main (int argc, char **argv)
 	}
 	g_object_unref (provider);
 
-	eom_plugin_engine_init ();
-
 	/* Add application specific icons to search path */
 	gtk_icon_theme_append_search_path (gtk_icon_theme_get_default (),
                                            EOM_DATA_DIR G_DIR_SEPARATOR_S "icons");
@@ -271,8 +268,6 @@ main (int argc, char **argv)
   	if (startup_files)
 		g_strfreev (startup_files);
 
-	eom_plugin_engine_shutdown ();
-
 #ifdef HAVE_EXEMPI
 	xmp_terminate();
 #endif