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/* $Id: thunar-extension-manager.c 18843 2005-11-14 14:25:58Z benny $ */
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* Copyright (c) 2005 Benedikt Meurer <benny@xfce.org>
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place, Suite 330, Boston, MA 02111-1307 USA
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#include <thunar/thunar-extension-manager.h>
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#define THUNAR_EXTENSIONS_DIRECTORY (LIBDIR G_DIR_SEPARATOR_S "thunarx-" THUNAR_VERSION_API)
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typedef struct _ThunarExtensionClass ThunarExtensionClass;
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typedef struct _ThunarExtension ThunarExtension;
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#define THUNAR_TYPE_EXTENSION (thunar_extension_get_type ())
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#define THUNAR_EXTENSION(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), THUNAR_TYPE_EXTENSION, ThunarExtension))
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#define THUNAR_EXTENSION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), THUNAR_TYPE_EXTENSION, ThunarExtensionClass))
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#define THUNAR_IS_EXTENSION(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), THUNAR_TYPE_EXTENSION))
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#define THUNAR_IS_EXTENSION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), THUNAR_TYPE_EXTENSION))
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#define THUNAR_EXTENSION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), THUNAR_TYPE_EXTENSION, ThunarExtensionClass))
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static GType thunar_extension_get_type (void) G_GNUC_CONST;
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static void thunar_extension_class_init (ThunarExtensionClass *klass);
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static void thunar_extension_finalize (GObject *object);
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static void thunar_extension_get_property (GObject *object,
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static void thunar_extension_set_property (GObject *object,
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static gboolean thunar_extension_load (GTypeModule *module);
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static void thunar_extension_unload (GTypeModule *module);
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static void thunar_extension_list_types (ThunarExtension *extension,
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struct _ThunarExtensionClass
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GTypeModuleClass __parent__;
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struct _ThunarExtension
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GTypeModule __parent__;
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void (*initialize) (GTypeModule *module);
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void (*shutdown) (void);
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void (*list_types) (const GType **types,
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static GObjectClass *thunar_extension_parent_class;
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thunar_extension_get_type (void)
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static GType type = G_TYPE_INVALID;
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if (G_UNLIKELY (type == G_TYPE_INVALID))
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static const GTypeInfo info =
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sizeof (ThunarExtensionClass),
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(GClassInitFunc) thunar_extension_class_init,
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sizeof (ThunarExtension),
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type = g_type_register_static (G_TYPE_TYPE_MODULE, "ThunarExtension", &info, 0);
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thunar_extension_class_init (ThunarExtensionClass *klass)
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GTypeModuleClass *gtype_module_class;
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GObjectClass *gobject_class;
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/* determine the parent class */
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thunar_extension_parent_class = g_type_class_peek_parent (klass);
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gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->finalize = thunar_extension_finalize;
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gobject_class->get_property = thunar_extension_get_property;
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gobject_class->set_property = thunar_extension_set_property;
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gtype_module_class = G_TYPE_MODULE_CLASS (klass);
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gtype_module_class->load = thunar_extension_load;
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gtype_module_class->unload = thunar_extension_unload;
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* ThunarExtension::resident:
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* Tells whether the extension must reside in memory once loaded
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* for the first time.
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g_object_class_install_property (gobject_class,
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g_param_spec_boolean ("resident",
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_("Ensures that an extension will never be unloaded."),
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EXO_PARAM_READWRITE));
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thunar_extension_finalize (GObject *object)
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ThunarExtension *extension = THUNAR_EXTENSION (object);
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/* free the path to the extension */
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g_free (extension->path);
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(*G_OBJECT_CLASS (thunar_extension_parent_class)->finalize) (object);
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thunar_extension_get_property (GObject *object,
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ThunarExtension *extension = THUNAR_EXTENSION (object);
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g_value_set_boolean (value, extension->resident);
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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thunar_extension_set_property (GObject *object,
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ThunarExtension *extension = THUNAR_EXTENSION (object);
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extension->resident = g_value_get_boolean (value);
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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thunar_extension_load (GTypeModule *module)
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ThunarExtension *extension = THUNAR_EXTENSION (module);
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/* load the extension using the runtime link editor */
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extension->module = g_module_open (extension->path, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
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/* check if the load operation was successful */
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if (G_UNLIKELY (extension->module == NULL))
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g_warning ("Failed to load file manager extension from %s: %s", extension->path, g_module_error ());
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/* verify that all required public symbols are present in the extension's symbol table */
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if (!g_module_symbol (extension->module, "thunar_extension_shutdown", (gpointer) &extension->shutdown)
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|| !g_module_symbol (extension->module, "thunar_extension_initialize", (gpointer) &extension->initialize)
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|| !g_module_symbol (extension->module, "thunar_extension_list_types", (gpointer) &extension->list_types))
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g_warning ("File manager extension loaded from %s lacks required symbols.", extension->path);
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g_module_close (extension->module);
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/* initialize the extension */
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(*extension->initialize) (module);
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/* ensure that the module will never be unloaded
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* if the extension requests to be kept in memory
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if (G_UNLIKELY (extension->resident))
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g_module_make_resident (extension->module);
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thunar_extension_unload (GTypeModule *module)
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ThunarExtension *extension = THUNAR_EXTENSION (module);
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/* shutdown the extension */
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(*extension->shutdown) ();
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/* unload the extension from memory */
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g_module_close (extension->module);
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/* reset extension state */
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extension->module = NULL;
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extension->shutdown = NULL;
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extension->initialize = NULL;
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extension->list_types = NULL;
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thunar_extension_list_types (ThunarExtension *extension,
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g_return_if_fail (THUNAR_IS_EXTENSION (extension));
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g_return_if_fail (n_types != NULL);
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g_return_if_fail (types != NULL);
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(*extension->list_types) (types, n_types);
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static void thunar_extension_manager_class_init (ThunarExtensionManagerClass *klass);
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static void thunar_extension_manager_init (ThunarExtensionManager *manager);
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static void thunar_extension_manager_finalize (GObject *object);
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static void thunar_extension_manager_add (ThunarExtensionManager *manager,
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ThunarExtension *extension);
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struct _ThunarExtensionManagerClass
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GObjectClass __parent__;
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struct _ThunarExtensionManager
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G_DEFINE_TYPE (ThunarExtensionManager, thunar_extension_manager, G_TYPE_OBJECT);
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thunar_extension_manager_class_init (ThunarExtensionManagerClass *klass)
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GObjectClass *gobject_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->finalize = thunar_extension_manager_finalize;
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thunar_extension_manager_init (ThunarExtensionManager *manager)
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ThunarExtension *extension;
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// FIXME: Perform this in a timer as the extensions aren't required to
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// be available instantly, maybe even load the files in a separate thread!
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dp = g_dir_open (THUNAR_EXTENSIONS_DIRECTORY, 0, NULL);
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if (G_LIKELY (dp != NULL))
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/* determine the types for all existing extensions */
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/* read the next entry from the directory */
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name = g_dir_read_name (dp);
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if (G_UNLIKELY (name == NULL))
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/* check if this is a valid extension file */
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if (g_str_has_suffix (name, "." G_MODULE_SUFFIX))
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/* generate an extension object for the file */
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extension = g_object_new (THUNAR_TYPE_EXTENSION, NULL);
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extension->path = g_build_filename (THUNAR_EXTENSIONS_DIRECTORY, name, NULL);
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/* try to load the extension */
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if (g_type_module_use (G_TYPE_MODULE (extension)))
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/* add the extension to our list of managed extensions */
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thunar_extension_manager_add (manager, extension);
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/* don't unuse the type plugin if it should be resident in memory */
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if (G_LIKELY (!extension->resident))
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g_type_module_unuse (G_TYPE_MODULE (extension));
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/* drop the reference on the extension */
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g_object_unref (G_OBJECT (extension));
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thunar_extension_manager_finalize (GObject *object)
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ThunarExtensionManager *manager = THUNAR_EXTENSION_MANAGER (object);
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/* release the extensions */
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g_list_foreach (manager->extensions, (GFunc) g_object_unref, NULL);
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g_list_free (manager->extensions);
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/* free the types list */
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g_free (manager->types);
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(*G_OBJECT_CLASS (thunar_extension_manager_parent_class)->finalize) (object);
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thunar_extension_manager_add (ThunarExtensionManager *manager,
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ThunarExtension *extension)
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/* add the extension to our internal list */
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manager->extensions = g_list_prepend (manager->extensions, g_object_ref (G_OBJECT (extension)));
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/* determines the types provided by the extension */
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thunar_extension_list_types (extension, &types, &n_types);
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/* add the types provided by the extension */
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manager->types = g_realloc (manager->types, sizeof (GType) * (manager->n_types + n_types));
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for (; n_types-- > 0; ++types)
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manager->types[manager->n_types++] = *types;
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* thunar_extension_manager_get_default:
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* Returns a reference to the default #ThunarExtensionManager
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* The caller is responsible to free the returned object
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* using g_object_unref() when no longer needed.
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* Return value: a reference to the default
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* #ThunarExtensionManager instance.
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ThunarExtensionManager*
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thunar_extension_manager_get_default (void)
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static ThunarExtensionManager *manager = NULL;
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if (G_UNLIKELY (manager == NULL))
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manager = g_object_new (THUNAR_TYPE_EXTENSION_MANAGER, NULL);
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g_object_ref (G_OBJECT (manager));
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* thunar_extension_manager_list_providers:
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* @manager : a #ThunarExtensionManager instance.
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* @type : the provider #GType.
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* Returns all providers of the given @type.
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* The caller is responsible to release the returned
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* list of providers using code like this:
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* <informalexample><programlisting>
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* g_list_foreach (list, (GFunc) g_object_unref, NULL);
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* g_list_free (list);
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* </programlisting></informalexample>
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* Return value: the of providers for @type.
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thunar_extension_manager_list_providers (ThunarExtensionManager *manager,
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GList *providers = NULL;
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for (n = manager->n_types, types = manager->types; n > 0; --n, ++types)
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if (G_LIKELY (g_type_is_a (*types, type)))
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provider = g_object_new (*types, NULL);
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if (G_LIKELY (provider != NULL))
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providers = g_list_append (providers, provider);
added
removed
thunar/thunar-extension-manager.c
