2 * AT-SPI - Assistive Technology Service Provider Interface
3 * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
5 * Copyright 2008, 2009 Codethink Ltd.
6 * Copyright 2001, 2002, 2003 Sun Microsystems Inc.,
7 * Copyright 2001, 2002, 2003 Ximian, Inc.
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
36 #include <droute/droute.h>
37 #include <atspi/atspi.h>
38 #include <atk-bridge.h>
44 #include "accessible-stateset.h"
46 #include "accessible-register.h"
47 #include "accessible-leasing.h"
48 #include "accessible-cache.h"
52 /*---------------------------------------------------------------------------*/
54 static DBusHandlerResult
55 signal_filter (DBusConnection *bus, DBusMessage *message, void *user_data);
57 SpiBridge *spi_global_app_data = NULL;
59 static gboolean inited = FALSE;
61 /*---------------------------------------------------------------------------*/
64 add_event (const char *bus_name, const char *event)
69 spi_atk_add_client (bus_name);
70 evdata = (event_data *) g_malloc (sizeof (*evdata));
73 data = g_strsplit (event, ":", 3);
79 evdata->bus_name = g_strdup (bus_name);
81 spi_global_app_data->events = g_list_append (spi_global_app_data->events, evdata);
84 static GSList *clients = NULL;
89 static int replies_received = 0;
92 if (replies_received == 3)
95 spi_atk_deregister_event_listeners ();
96 spi_global_app_data->events_initialized = TRUE;
101 get_events_reply (DBusPendingCall *pending, void *user_data)
103 DBusMessage *reply = dbus_pending_call_steal_reply (pending);
104 DBusMessageIter iter, iter_array, iter_struct;
109 if (strcmp (dbus_message_get_signature (reply), "a(ss)") != 0)
111 g_warning ("atk-bridge: GetRegisteredEvents returned message with unknown signature");
115 dbus_message_iter_init (reply, &iter);
116 dbus_message_iter_recurse (&iter, &iter_array);
117 while (dbus_message_iter_get_arg_type (&iter_array) != DBUS_TYPE_INVALID)
119 char *bus_name, *event;
120 dbus_message_iter_recurse (&iter_array, &iter_struct);
121 dbus_message_iter_get_basic (&iter_struct, &bus_name);
122 dbus_message_iter_next (&iter_struct);
123 dbus_message_iter_get_basic (&iter_struct, &event);
124 add_event (bus_name, event);
125 dbus_message_iter_next (&iter_array);
130 dbus_message_unref (reply);
132 dbus_pending_call_unref (pending);
134 tally_event_reply ();
138 get_device_events_reply (DBusPendingCall *pending, void *user_data)
140 DBusMessage *reply = dbus_pending_call_steal_reply (pending);
141 DBusMessageIter iter, iter_array, iter_struct;
146 if (strncmp (dbus_message_get_signature (reply), "a(s", 3) != 0)
148 g_warning ("atk-bridge: get_device_events_reply: unknown signature");
152 dbus_message_iter_init (reply, &iter);
153 dbus_message_iter_recurse (&iter, &iter_array);
154 while (dbus_message_iter_get_arg_type (&iter_array) != DBUS_TYPE_INVALID)
157 dbus_message_iter_recurse (&iter_array, &iter_struct);
158 dbus_message_iter_get_basic (&iter_struct, &bus_name);
159 spi_atk_add_client (bus_name);
160 dbus_message_iter_next (&iter_array);
165 dbus_message_unref (reply);
167 dbus_pending_call_unref (pending);
169 tally_event_reply ();
173 get_registered_event_listeners (SpiBridge *app)
175 DBusMessage *message;
176 DBusPendingCall *pending = NULL;
178 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
179 ATSPI_DBUS_PATH_REGISTRY,
180 ATSPI_DBUS_INTERFACE_REGISTRY,
181 "GetRegisteredEvents");
185 dbus_connection_send_with_reply (app->bus, message, &pending, -1);
186 dbus_message_unref (message);
189 spi_global_app_data->events_initialized = TRUE;
192 dbus_pending_call_set_notify (pending, get_events_reply, NULL, NULL);
194 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
196 ATSPI_DBUS_INTERFACE_DEC,
197 "GetKeystrokeListeners");
201 dbus_connection_send_with_reply (app->bus, message, &pending, -1);
202 dbus_message_unref (message);
205 spi_global_app_data->events_initialized = TRUE;
208 dbus_pending_call_set_notify (pending, get_device_events_reply, NULL, NULL);
210 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
212 ATSPI_DBUS_INTERFACE_DEC,
213 "GetDeviceEventListeners");
217 dbus_connection_send_with_reply (app->bus, message, &pending, -1);
218 dbus_message_unref (message);
221 spi_global_app_data->events_initialized = TRUE;
224 dbus_pending_call_set_notify (pending, get_device_events_reply, NULL, NULL);
228 register_reply (DBusPendingCall *pending, void *user_data)
231 SpiBridge *app = user_data;
233 reply = dbus_pending_call_steal_reply (pending);
234 dbus_pending_call_unref (pending);
237 gchar *app_name, *obj_path;
239 if (strcmp (dbus_message_get_signature (reply), "(so)") != 0)
241 g_warning ("AT-SPI: Could not obtain desktop path or name\n");
245 DBusMessageIter iter, iter_struct;
246 dbus_message_iter_init (reply, &iter);
247 dbus_message_iter_recurse (&iter, &iter_struct);
248 dbus_message_iter_get_basic (&iter_struct, &app_name);
249 dbus_message_iter_next (&iter_struct);
250 dbus_message_iter_get_basic (&iter_struct, &obj_path);
252 app->desktop_name = g_strdup (app_name);
253 app->desktop_path = g_strdup (obj_path);
258 g_warning ("AT-SPI: Could not embed inside desktop");
261 dbus_message_unref (reply);
263 get_registered_event_listeners (spi_global_app_data);
267 register_application (SpiBridge * app)
269 DBusMessage *message;
270 DBusMessageIter iter;
272 DBusPendingCall *pending;
273 const int max_addr_length = 128; /* should be long enough */
275 dbus_error_init (&error);
277 /* These will be overridden when we get a reply, but in practice these
278 defaults should always be correct */
279 app->desktop_name = ATSPI_DBUS_NAME_REGISTRY;
280 app->desktop_path = ATSPI_DBUS_PATH_ROOT;
282 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
283 ATSPI_DBUS_PATH_ROOT,
284 ATSPI_DBUS_INTERFACE_SOCKET,
287 dbus_message_iter_init_append (message, &iter);
288 spi_object_append_reference (&iter, app->root);
290 if (!dbus_connection_send_with_reply (app->bus, message, &pending, -1)
296 dbus_pending_call_set_notify (pending, register_reply, app, NULL);
299 dbus_message_unref (message);
301 /* could this be better, we accept some amount of race in getting the temp name*/
302 /* make sure the directory exists */
303 mkdir ("/tmp/at-spi2/", S_IRWXU|S_IRWXG|S_IRWXO|S_ISVTX);
304 chmod ("/tmp/at-spi2/", S_IRWXU|S_IRWXG|S_IRWXO|S_ISVTX);
305 app->app_bus_addr = g_malloc(max_addr_length * sizeof(char));
307 sprintf (app->app_bus_addr, "unix:path=/tmp/at-spi2/socket-%d-%d", getpid(),
310 app->app_bus_addr [0] = '\0';
316 /*---------------------------------------------------------------------------*/
319 deregister_application (SpiBridge * app)
321 DBusMessage *message;
322 DBusMessageIter iter;
326 dbus_error_init (&error);
328 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
329 ATSPI_DBUS_PATH_REGISTRY,
330 ATSPI_DBUS_INTERFACE_REGISTRY,
331 "DeregisterApplication");
332 dbus_message_set_no_reply (message, TRUE);
334 uname = dbus_bus_get_unique_name (app->bus);
336 dbus_message_iter_init_append (message, &iter);
337 dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &uname);
338 dbus_connection_send (app->bus, message, NULL);
340 dbus_message_unref (message);
343 /*---------------------------------------------------------------------------*/
345 /*---------------------------------------------------------------------------*/
347 static AtkPlugClass *plug_class;
348 static AtkSocketClass *socket_class;
351 get_plug_id (AtkPlug * plug)
353 const char *uname = dbus_bus_get_unique_name (spi_global_app_data->bus);
355 GString *str = g_string_new (NULL);
357 path = spi_register_object_to_path (spi_global_register, G_OBJECT (plug));
358 g_string_printf (str, "%s:%s", uname, path);
360 return g_string_free (str, FALSE);
364 socket_ref_state_set (AtkObject *accessible)
366 char *child_name, *child_path;
367 AtkSocket *socket = ATK_SOCKET (accessible);
371 DBusMessage *message, *reply;
372 DBusMessageIter iter, iter_array;
375 set = atk_state_set_new ();
377 if (!socket->embedded_plug_id)
380 child_name = g_strdup (socket->embedded_plug_id);
383 child_path = g_utf8_strchr (child_name + 1, -1, ':');
389 *(child_path++) = '\0';
390 message = dbus_message_new_method_call (child_name, child_path, ATSPI_DBUS_INTERFACE_ACCESSIBLE, "GetState");
392 reply = dbus_connection_send_with_reply_and_block (spi_global_app_data->bus, message, 1, NULL);
393 dbus_message_unref (message);
396 if (strcmp (dbus_message_get_signature (reply), "au") != 0)
398 dbus_message_unref (reply);
402 dbus_message_iter_init (reply, &iter);
403 dbus_message_iter_recurse (&iter, &iter_array);
406 dbus_message_iter_get_basic (&iter_array, &v);
407 for (j = 0; j < 32; j++)
411 AtkState state = spi_atk_state_from_spi_state ((count << 5) + j);
412 atk_state_set_add_state (set, state);
417 while (dbus_message_iter_next (&iter_array));
418 dbus_message_unref (reply);
423 socket_embed_hook (AtkSocket * socket, gchar * plug_id)
425 AtkObject *accessible = ATK_OBJECT(socket);
426 gchar *plug_name, *plug_path;
427 AtkObjectClass *klass;
429 /* Force registration */
430 gchar *path = spi_register_object_to_path (spi_global_register, G_OBJECT (accessible));
431 /* Let the plug know that it has been embedded */
432 plug_name = g_strdup (plug_id);
438 plug_path = g_utf8_strchr (plug_name + 1, -1, ':');
441 DBusMessage *message;
442 *(plug_path++) = '\0';
443 message = dbus_message_new_method_call (plug_name, plug_path, ATSPI_DBUS_INTERFACE_SOCKET, "Embedded");
444 dbus_message_append_args (message, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID);
445 dbus_connection_send (spi_global_app_data->bus, message, NULL);
450 klass = ATK_OBJECT_GET_CLASS (accessible);
451 klass->ref_state_set = socket_ref_state_set;
455 install_plug_hooks ()
459 data = g_type_class_ref (ATK_TYPE_PLUG);
460 plug_class = ATK_PLUG_CLASS (data);
461 data = g_type_class_ref (ATK_TYPE_SOCKET);
462 socket_class = ATK_SOCKET_CLASS (data);
463 plug_class->get_object_id = get_plug_id;
464 socket_class->embed = socket_embed_hook;
468 get_ancestral_uid (guint pid)
474 gboolean got_ppid = 0;
475 gboolean got_uid = 0;
477 sprintf (buf, "/proc/%d/status", pid);
478 fp = fopen (buf, "r");
481 while ((!got_ppid || !got_uid) && fgets (buf, sizeof (buf), fp))
483 if (sscanf (buf, "PPid:\t%d", &ppid) == 1)
485 else if (sscanf (buf, "Uid:\t%d", &uid) == 1)
490 if (!got_ppid || !got_uid)
494 if (ppid == 0 || ppid == 1)
496 return get_ancestral_uid (ppid);
500 user_check (DBusConnection *bus, unsigned long uid, void *data)
502 if (uid == getuid () || uid == geteuid ())
505 return get_ancestral_uid (getpid ()) == uid;
510 new_connection_cb (DBusServer *server, DBusConnection *con, void *data)
512 dbus_connection_set_unix_user_function (con, user_check, NULL, NULL);
513 dbus_connection_ref(con);
514 atspi_dbus_connection_setup_with_g_main(con, NULL);
515 droute_intercept_dbus (con);
516 droute_context_register (spi_global_app_data->droute, con);
518 spi_global_app_data->direct_connections = g_list_append (spi_global_app_data->direct_connections, con);
528 dbus_error_init(&err);
529 server = dbus_server_listen(spi_global_app_data->app_bus_addr, &err);
532 g_warning ("atk-bridge: Couldn't listen on dbus server: %s", err.message);
533 dbus_error_init (&err);
534 spi_global_app_data->app_bus_addr [0] = '\0';
535 g_main_context_unref (spi_global_app_data->main_context);
536 spi_global_app_data->main_context = NULL;
540 atspi_dbus_server_setup_with_g_main(server, NULL);
541 dbus_server_set_new_connection_function(server, new_connection_cb, NULL, NULL);
543 spi_global_app_data->server = server;
550 gchar *atspi_dbus_name = NULL;
551 static gboolean atspi_no_register = FALSE;
553 static GOptionEntry atspi_option_entries[] = {
554 {"atspi-dbus-name", 0, 0, G_OPTION_ARG_STRING, &atspi_dbus_name,
555 "D-Bus bus name to register as", NULL},
556 {"atspi-no-register", 0, 0, G_OPTION_ARG_NONE, &atspi_no_register,
557 "Do not register with Registry Daemon", NULL},
562 introspect_children_cb (const char *path, void *data)
564 if (!strcmp (path, "/org/a11y/atspi/accessible"))
566 return g_strdup ("<node name=\"root\"/>\n");
567 /* TODO: Should we place the whole hierarchy here? */
573 handle_event_listener_registered (DBusConnection *bus, DBusMessage *message,
579 if (!dbus_message_get_args (message, NULL, DBUS_TYPE_STRING, &sender,
580 DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
583 add_event (sender, name);
587 remove_events (const char *bus_name, const char *event)
592 remove_data = g_strsplit (event, ":", 3);
598 for (list = spi_global_app_data->events; list;)
600 event_data *evdata = list->data;
601 if (!g_strcmp0 (evdata->bus_name, bus_name) &&
602 spi_event_is_subtype (evdata->data, remove_data))
604 GList *events = spi_global_app_data->events;
606 g_strfreev (evdata->data);
607 g_free (evdata->bus_name);
609 spi_global_app_data->events = g_list_remove (events, evdata);
617 g_strfreev (remove_data);
621 handle_event_listener_deregistered (DBusConnection *bus, DBusMessage *message,
627 if (!dbus_message_get_args (message, NULL, DBUS_TYPE_STRING, &sender,
628 DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
631 remove_events (sender, name);
635 handle_device_listener_registered (DBusConnection *bus, DBusMessage *message,
639 DBusMessageIter iter, iter_struct;
641 if (strncmp (dbus_message_get_signature (message), "(s", 2) != 0)
643 g_warning ("atk-bridge: handle_device_listener_register: unknown signature");
647 dbus_message_iter_init (message, &iter);
648 dbus_message_iter_recurse (&iter, &iter_struct);
649 dbus_message_iter_get_basic (&iter_struct, &sender);
650 spi_atk_add_client (sender);
653 static DBusHandlerResult
654 signal_filter (DBusConnection *bus, DBusMessage *message, void *user_data)
656 const char *interface = dbus_message_get_interface (message);
657 const char *member = dbus_message_get_member (message);
658 DBusHandlerResult result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
660 if (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_SIGNAL)
661 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
663 if (!strcmp (interface, ATSPI_DBUS_INTERFACE_REGISTRY))
665 result = DBUS_HANDLER_RESULT_HANDLED;
666 if (!strcmp (member, "EventListenerRegistered"))
667 handle_event_listener_registered (bus, message, user_data);
668 else if (!strcmp (member, "EventListenerDeregistered"))
669 handle_event_listener_deregistered (bus, message, user_data);
671 result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
673 else if (!strcmp (interface, ATSPI_DBUS_INTERFACE_DEVICE_EVENT_LISTENER))
675 result = DBUS_HANDLER_RESULT_HANDLED;
676 if (!strcmp (member, "KeystrokeListenerRegistered"))
677 handle_device_listener_registered (bus, message, user_data);
678 else if (!strcmp (member, "DeviceListenerRegistered"))
679 handle_device_listener_registered (bus, message, user_data);
681 result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
684 if (!g_strcmp0(interface, DBUS_INTERFACE_DBUS) &&
685 !g_strcmp0(member, "NameOwnerChanged"))
687 char *name, *old, *new;
688 result = DBUS_HANDLER_RESULT_HANDLED;
689 if (dbus_message_get_args (message, NULL,
690 DBUS_TYPE_STRING, &name,
691 DBUS_TYPE_STRING, &old,
692 DBUS_TYPE_STRING, &new,
695 if (*old != '\0' && *new == '\0')
696 spi_atk_remove_client (old);
704 * Checks the status of the environment variables
706 * At this moment it only checks NO_AT_BRIDGE
708 * Returns TRUE if there isn't anything on the environment preventing
709 * you to load the bridge, FALSE otherwise
716 envvar = g_getenv ("NO_AT_BRIDGE");
718 if (envvar && atoi (envvar) == 1)
727 * The following needs to be initialized.
729 * - DRoute for routing message to their accessible objects.
730 * - Event handlers for emmitting signals on specific ATK events.
731 * - setup the bus for p2p communication
732 * - Application registration with the AT-SPI registry.
736 atk_bridge_adaptor_init (gint * argc, gchar ** argv[])
742 gboolean load_bridge;
743 DRoutePath *treepath, *accpath;
745 load_bridge = check_envvar ();
746 if (inited && !load_bridge)
747 g_warning ("ATK Bridge is disabled but a11y has already been enabled.");
749 if (inited || !load_bridge)
754 root = atk_get_root ();
755 g_warn_if_fail (root);
762 /* Parse command line options */
763 opt = g_option_context_new (NULL);
764 g_option_context_add_main_entries (opt, atspi_option_entries, NULL);
765 g_option_context_set_ignore_unknown_options (opt, TRUE);
766 if (!g_option_context_parse (opt, argc, argv, &err))
767 g_warning ("AT-SPI Option parsing failed: %s\n", err->message);
768 g_option_context_free (opt);
770 /* Allocate global data and do ATK initializations */
771 spi_global_app_data = g_new0 (SpiBridge, 1);
772 spi_global_app_data->root = g_object_ref (root);
774 /* Set up D-Bus connection and register bus name */
775 dbus_error_init (&error);
776 spi_global_app_data->bus = atspi_get_a11y_bus ();
777 if (!spi_global_app_data->bus)
779 g_free (spi_global_app_data);
780 spi_global_app_data = NULL;
785 if (atspi_dbus_name != NULL)
787 if (dbus_bus_request_name
788 (spi_global_app_data->bus, atspi_dbus_name, 0, &error))
790 g_print ("AT-SPI Recieved D-Bus name - %s\n", atspi_dbus_name);
795 ("AT-SPI D-Bus name requested but could not be allocated - %s\n",
800 spi_global_app_data->main_context = g_main_context_new ();
802 atspi_dbus_connection_setup_with_g_main (spi_global_app_data->bus, NULL);
804 /* Hook our plug-and socket functions */
805 install_plug_hooks ();
808 * Create the leasing, register and cache objects.
809 * The order is important here, the cache depends on the
812 spi_global_register = g_object_new (SPI_REGISTER_TYPE, NULL);
813 spi_global_leasing = g_object_new (SPI_LEASING_TYPE, NULL);
814 spi_global_cache = g_object_new (SPI_CACHE_TYPE, NULL);
816 /* Register droute for routing AT-SPI messages */
817 spi_global_app_data->droute =
820 treepath = droute_add_one (spi_global_app_data->droute,
821 "/org/a11y/atspi/cache", spi_global_cache);
825 g_warning ("atk-bridge: Error in droute_add_one(). Already running?");
829 accpath = droute_add_many (spi_global_app_data->droute,
830 "/org/a11y/atspi/accessible",
832 introspect_children_cb,
834 (DRouteGetDatumFunction)
835 spi_global_register_path_to_object);
838 /* Register all interfaces with droute and set up application accessible db */
839 spi_initialize_cache (treepath);
840 spi_initialize_accessible (accpath);
841 spi_initialize_application (accpath);
842 spi_initialize_action (accpath);
843 spi_initialize_collection (accpath);
844 spi_initialize_component (accpath);
845 spi_initialize_document (accpath);
846 spi_initialize_editabletext (accpath);
847 spi_initialize_hyperlink (accpath);
848 spi_initialize_hypertext (accpath);
849 spi_initialize_image (accpath);
850 spi_initialize_selection (accpath);
851 spi_initialize_socket (accpath);
852 spi_initialize_table (accpath);
853 spi_initialize_text (accpath);
854 spi_initialize_value (accpath);
856 droute_context_register (spi_global_app_data->droute,
857 spi_global_app_data->bus);
859 /* Register methods to send D-Bus signals on certain ATK events */
860 spi_atk_register_event_listeners ();
862 /* Set up filter and match rules to catch signals */
863 dbus_bus_add_match (spi_global_app_data->bus, "type='signal', interface='org.a11y.atspi.Registry', sender='org.a11y.atspi.Registry'", NULL);
864 dbus_bus_add_match (spi_global_app_data->bus, "type='signal', interface='org.a11y.atspi.DeviceEventListener', sender='org.a11y.atspi.Registry'", NULL);
865 dbus_connection_add_filter (spi_global_app_data->bus, signal_filter, NULL,
868 /* Register this app by sending a signal out to AT-SPI registry daemon */
869 if (!atspi_no_register && (!root || !ATK_IS_PLUG (root)))
870 register_application (spi_global_app_data);
872 get_registered_event_listeners (spi_global_app_data);
880 atk_bridge_adaptor_cleanup (void)
885 g_return_if_fail (inited);
887 if (!spi_global_app_data)
890 spi_atk_tidy_windows ();
891 spi_atk_deregister_event_listeners ();
893 deregister_application (spi_global_app_data);
895 if (spi_global_app_data->bus)
897 dbus_connection_remove_filter (spi_global_app_data->bus, signal_filter, NULL);
898 droute_context_unregister (spi_global_app_data->droute, spi_global_app_data->bus);
899 dbus_connection_unref (spi_global_app_data->bus);
902 for (l = spi_global_app_data->direct_connections; l; l = l->next)
904 DBusConnection *connection;
906 connection = l->data;
908 droute_context_unregister (spi_global_app_data->droute, connection);
909 droute_unintercept_dbus (connection);
910 dbus_connection_unref (connection);
912 g_list_free (spi_global_app_data->direct_connections);
914 for (ls = clients; ls; ls = ls->next)
916 g_slist_free (clients);
919 g_object_unref (spi_global_cache);
920 g_object_unref (spi_global_leasing);
921 g_object_unref (spi_global_register);
923 if (spi_global_app_data->main_context)
924 g_main_context_unref (spi_global_app_data->main_context);
926 droute_free (spi_global_app_data->droute);
928 g_free (spi_global_app_data);
929 spi_global_app_data = NULL;
934 /*---------------------------------------------------------------------------*/
936 static gchar *name_match_tmpl =
937 "type='signal', interface='org.freedesktop.DBus', member='NameOwnerChanged', arg0='%s'";
940 spi_atk_add_client (const char *bus_name)
945 for (l = clients; l; l = l->next)
947 if (!g_strcmp0 (l->data, bus_name))
950 if (!clients && spi_global_app_data->events_initialized)
951 spi_atk_register_event_listeners ();
952 clients = g_slist_append (clients, g_strdup (bus_name));
953 match = g_strdup_printf (name_match_tmpl, bus_name);
954 dbus_bus_add_match (spi_global_app_data->bus, match, NULL);
959 spi_atk_remove_client (const char *bus_name)
969 if (!g_strcmp0 (l->data, bus_name))
971 gchar *match = g_strdup_printf (name_match_tmpl, l->data);
972 dbus_bus_remove_match (spi_global_app_data->bus, match, NULL);
975 clients = g_slist_delete_link (clients, l);
977 spi_atk_deregister_event_listeners ();
984 /*END------------------------------------------------------------------------*/