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.
26 #include "dbus/dbus-glib-lowlevel.h"
29 #include <X11/Xatom.h>
37 #include <droute/droute.h>
44 #include "accessible-register.h"
45 #include "accessible-leasing.h"
46 #include "accessible-cache.h"
48 #include "common/spi-dbus.h"
50 /*---------------------------------------------------------------------------*/
52 SpiBridge *spi_global_app_data = NULL;
54 static const AtkMisc *atk_misc = NULL;
56 /*static Display *bridge_display = NULL;*/
58 /*---------------------------------------------------------------------------*/
61 * Returns a 'canonicalized' value for DISPLAY,
62 * with the screen number stripped off if present.
66 spi_display_name (void)
68 static const char *canonical_display_name = NULL;
69 if (!canonical_display_name)
71 const gchar *display_env = g_getenv ("AT_SPI_DISPLAY");
74 display_env = g_getenv ("DISPLAY");
75 if (!display_env || !display_env[0])
76 canonical_display_name = ":0";
79 gchar *display_p, *screen_p;
80 canonical_display_name = g_strdup (display_env);
81 display_p = strrchr (canonical_display_name, ':');
82 screen_p = strrchr (canonical_display_name, '.');
83 if (screen_p && display_p && (screen_p > display_p))
91 canonical_display_name = display_env;
94 return canonical_display_name;
97 /*---------------------------------------------------------------------------*/
100 * Gets the IOR from the XDisplay.
101 * Not currently used in D-Bus version, but something similar
102 * may be employed in the future for accessing the registry daemon
106 static DBusConnection *
107 spi_atk_bridge_get_bus (void)
111 Display *bridge_display;
113 unsigned char *data = NULL;
114 unsigned long nitems;
115 unsigned long leftover;
117 DBusConnection *bus = NULL;
120 bridge_display = XOpenDisplay (spi_display_name ());
122 g_error ("AT_SPI: Could not get the display\n");
124 AT_SPI_BUS = XInternAtom (bridge_display, "AT_SPI_BUS", False);
125 XGetWindowProperty (bridge_display,
126 XDefaultRootWindow (bridge_display),
128 (long) BUFSIZ, False,
129 (Atom) 31, &actual_type, &actual_format,
130 &nitems, &leftover, &data);
132 dbus_error_init (&error);
137 ("AT-SPI: Accessibility bus not found - Using session bus.\n");
138 bus = dbus_bus_get (DBUS_BUS_SESSION, &error);
140 g_error ("AT-SPI: Couldn't connect to bus: %s\n", error.message);
144 bus = dbus_connection_open (data, &error);
147 g_error ("AT-SPI: Couldn't connect to bus: %s\n", error.message);
151 if (!dbus_bus_register (bus, &error))
152 g_error ("AT-SPI: Couldn't register with bus: %s\n", error.message);
160 set_reply (DBusPendingCall *pending, void *user_data)
162 void **replyptr = (void **)user_data;
164 *replyptr = dbus_pending_call_steal_reply (pending);
168 send_and_allow_reentry (DBusConnection *bus, DBusMessage *message, DBusError *error)
170 DBusPendingCall *pending;
171 DBusMessage *reply = NULL;
173 if (!dbus_connection_send_with_reply (bus, message, &pending, -1))
177 dbus_pending_call_set_notify (pending, set_reply, (void *)&reply, NULL);
180 if (!dbus_connection_read_write_dispatch (bus, -1)) return NULL;
184 /*---------------------------------------------------------------------------*/
187 register_reply (DBusPendingCall *pending, void *user_data)
190 SpiBridge *app = user_data;
192 reply = dbus_pending_call_steal_reply (pending);
195 DBusMessageIter iter, iter_struct;
196 gchar *app_name, *obj_path;
198 if (strcmp (dbus_message_get_signature (reply), "(so)") != 0)
200 g_warning ("AT-SPI: Could not obtain desktop path or name\n");
201 dbus_message_unref (reply);
205 dbus_message_iter_init (reply, &iter);
206 dbus_message_iter_recurse (&iter, &iter_struct);
207 dbus_message_iter_get_basic (&iter_struct, &app_name);
208 dbus_message_iter_next (&iter_struct);
209 dbus_message_iter_get_basic (&iter_struct, &obj_path);
211 app->desktop_name = g_strdup (app_name);
212 app->desktop_path = g_strdup (obj_path);
216 g_warning ("AT-SPI: Could not embed inside desktop");
219 dbus_message_unref (reply);
223 register_application (SpiBridge * app)
225 DBusMessage *message, *reply;
226 DBusMessageIter iter;
228 DBusPendingCall *pending;
230 dbus_error_init (&error);
232 /* These will be overridden when we get a reply, but in practice these
233 defaults should always be correct */
234 app->desktop_name = SPI_DBUS_NAME_REGISTRY;
235 app->desktop_path = SPI_DBUS_PATH_ROOT;
237 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
239 SPI_DBUS_INTERFACE_SOCKET,
242 dbus_message_iter_init_append (message, &iter);
243 spi_object_append_reference (&iter, app->root);
245 if (!dbus_connection_send_with_reply (app->bus, message, &pending, -1))
250 dbus_pending_call_set_notify (pending, register_reply, app, NULL);
253 dbus_message_unref (message);
258 /*---------------------------------------------------------------------------*/
261 deregister_application (SpiBridge * app)
263 DBusMessage *message;
264 DBusMessageIter iter;
268 dbus_error_init (&error);
270 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
271 SPI_DBUS_PATH_REGISTRY,
272 SPI_DBUS_INTERFACE_REGISTRY,
273 "DeregisterApplication");
274 dbus_message_set_no_reply (message, TRUE);
276 uname = dbus_bus_get_unique_name (app->bus);
278 dbus_message_iter_init_append (message, &iter);
279 dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &uname);
280 dbus_connection_send (app->bus, message, NULL);
282 dbus_message_unref (message);
285 /*---------------------------------------------------------------------------*/
290 if (!spi_global_app_data)
295 spi_atk_tidy_windows ();
296 spi_atk_deregister_event_listeners ();
297 deregister_application (spi_global_app_data);
299 g_free (spi_global_app_data);
300 spi_global_app_data = NULL;
302 /* Not currently creating an XDisplay */
305 XCloseDisplay (bridge_display);
309 /*---------------------------------------------------------------------------*/
311 static AtkPlugClass *plug_class;
312 static AtkSocketClass *socket_class;
315 get_plug_id (AtkPlug * plug)
317 const char *uname = dbus_bus_get_unique_name (spi_global_app_data->bus);
319 GString *str = g_string_new (NULL);
321 path = spi_register_object_to_path (spi_global_register, G_OBJECT (plug));
322 g_string_printf (str, "%s:%s", uname, path);
324 return g_string_free (str, FALSE);
328 socket_ref_state_set (AtkObject *accessible)
330 char *child_name, *child_path;
331 AtkSocket *socket = ATK_SOCKET (accessible);
335 DBusMessage *message, *reply;
336 DBusMessageIter iter, iter_array;
339 if (!socket->embedded_plug_id)
342 child_name = g_strdup (socket->embedded_plug_id);
345 child_path = g_utf8_strchr (child_name + 1, -1, ':');
351 *(child_path++) = '\0';
352 message = dbus_message_new_method_call (child_name, child_path, SPI_DBUS_INTERFACE_ACCESSIBLE, "GetState");
354 reply = dbus_connection_send_with_reply_and_block (spi_global_app_data->bus, message, 1, NULL);
355 dbus_message_unref (message);
358 if (strcmp (dbus_message_get_signature (reply), "au") != 0)
360 dbus_message_unref (reply);
363 set = atk_state_set_new ();
366 dbus_message_iter_init (reply, &iter);
367 dbus_message_iter_recurse (&iter, &iter_array);
370 dbus_message_iter_get_basic (&iter_array, &v);
371 for (j = 0; j < 32; j++)
375 AtkState state = spi_atk_state_from_spi_state ((count << 5) + j);
376 atk_state_set_add_state (set, state);
381 while (dbus_message_iter_next (&iter_array));
382 dbus_message_unref (reply);
387 socket_embed_hook (AtkSocket * socket, gchar * plug_id)
389 AtkObject *accessible = ATK_OBJECT(socket);
390 gchar *plug_name, *plug_path;
391 AtkObjectClass *klass;
393 /* Force registration */
394 gchar *path = spi_register_object_to_path (spi_global_register, G_OBJECT (accessible));
395 /* Let the plug know that it has been embedded */
396 plug_name = g_strdup (plug_id);
402 plug_path = g_utf8_strchr (plug_name + 1, -1, ':');
405 DBusMessage *message;
406 *(plug_path++) = '\0';
407 message = dbus_message_new_method_call (plug_name, plug_path, SPI_DBUS_INTERFACE_SOCKET, "Embedded");
408 dbus_message_append_args (message, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID);
409 dbus_connection_send (spi_global_app_data->bus, message, NULL);
414 klass = ATK_OBJECT_GET_CLASS (accessible);
415 klass->ref_state_set = socket_ref_state_set;
419 install_plug_hooks ()
423 data = g_type_class_ref (ATK_TYPE_PLUG);
424 plug_class = ATK_PLUG_CLASS (data);
425 data = g_type_class_ref (ATK_TYPE_SOCKET);
426 socket_class = ATK_SOCKET_CLASS (data);
427 plug_class->get_object_id = get_plug_id;
428 socket_class->embed = socket_embed_hook;
431 gchar *atspi_dbus_name = NULL;
432 static gboolean atspi_no_register = FALSE;
434 static GOptionEntry atspi_option_entries[] = {
435 {"atspi-dbus-name", 0, 0, G_OPTION_ARG_STRING, &atspi_dbus_name,
436 "D-Bus bus name to register as", NULL},
437 {"atspi-no-register", 0, 0, G_OPTION_ARG_NONE, &atspi_no_register,
438 "Do not register with Registry Daemon", NULL},
443 introspect_children_cb (const char *path, void *data)
445 if (!strcmp (path, "/org/a11y/atspi/accessible"))
447 return g_strdup ("<node name=\"root\"/>\n");
448 /* TODO: Should we place the whole hierarchy here? */
456 * The following needs to be initialized.
458 * - DRoute for routing message to their accessible objects.
459 * - Event handlers for emmitting signals on specific ATK events.
460 * - Application registration with the AT-SPI registry.
464 adaptor_init (gint * argc, gchar ** argv[])
471 gchar *introspection_directory;
472 static gboolean inited = FALSE;
479 DRoutePath *treepath, *accpath;
481 root = atk_get_root ();
482 g_return_val_if_fail (root, 0);
484 /* Parse command line options */
485 opt = g_option_context_new (NULL);
486 g_option_context_add_main_entries (opt, atspi_option_entries, NULL);
487 g_option_context_set_ignore_unknown_options (opt, TRUE);
488 if (!g_option_context_parse (opt, argc, argv, &err))
489 g_warning ("AT-SPI Option parsing failed: %s\n", err->message);
491 /* Allocate global data and do ATK initializations */
492 spi_global_app_data = g_new0 (SpiBridge, 1);
493 atk_misc = atk_misc_get_instance ();
494 spi_global_app_data->root = g_object_ref (root);
496 /* Set up D-Bus connection and register bus name */
497 dbus_error_init (&error);
498 spi_global_app_data->bus = spi_atk_bridge_get_bus ();
499 if (!spi_global_app_data->bus)
501 g_free (spi_global_app_data);
502 spi_global_app_data = NULL;
506 if (atspi_dbus_name != NULL)
508 if (dbus_bus_request_name
509 (spi_global_app_data->bus, atspi_dbus_name, 0, &error))
511 g_print ("AT-SPI Recieved D-Bus name - %s\n", atspi_dbus_name);
516 ("AT-SPI D-Bus name requested but could not be allocated - %s\n",
521 dbus_connection_setup_with_g_main (spi_global_app_data->bus,
522 g_main_context_default ());
524 /* Hook our plug-and socket functions */
525 install_plug_hooks ();
528 * Create the leasing, register and cache objects.
529 * The order is important here, the cache depends on the
532 spi_global_register = g_object_new (SPI_REGISTER_TYPE, NULL);
533 spi_global_leasing = g_object_new (SPI_LEASING_TYPE, NULL);
534 spi_global_cache = g_object_new (SPI_CACHE_TYPE, NULL);
536 /* Register droute for routing AT-SPI messages */
537 spi_global_app_data->droute =
538 droute_new (spi_global_app_data->bus);
540 treepath = droute_add_one (spi_global_app_data->droute,
541 "/org/a11y/atspi/cache", spi_global_cache);
545 g_warning ("atk-bridge: Error in droute_add_one(). Already running?");
549 accpath = droute_add_many (spi_global_app_data->droute,
550 "/org/a11y/atspi/accessible",
552 introspect_children_cb,
554 (DRouteGetDatumFunction)
555 spi_global_register_path_to_object);
558 /* Register all interfaces with droute and set up application accessible db */
559 spi_initialize_cache (treepath);
560 spi_initialize_accessible (accpath);
561 spi_initialize_application (accpath);
562 spi_initialize_action (accpath);
563 spi_initialize_collection (accpath);
564 spi_initialize_component (accpath);
565 spi_initialize_document (accpath);
566 spi_initialize_editabletext (accpath);
567 spi_initialize_hyperlink (accpath);
568 spi_initialize_hypertext (accpath);
569 spi_initialize_image (accpath);
570 spi_initialize_selection (accpath);
571 spi_initialize_socket (accpath);
572 spi_initialize_table (accpath);
573 spi_initialize_text (accpath);
574 spi_initialize_value (accpath);
576 /* Register methods to send D-Bus signals on certain ATK events */
577 spi_atk_register_event_listeners ();
579 /* Register this app by sending a signal out to AT-SPI registry daemon */
580 if (!atspi_no_register && (!root || !ATK_IS_PLUG (root)))
581 register_application (spi_global_app_data);
583 g_atexit (exit_func);
588 /*---------------------------------------------------------------------------*/
591 gtk_module_init (gint * argc, gchar ** argv[])
593 const gchar *load_bridge = g_getenv ("NO_AT_BRIDGE");
595 if (!load_bridge || g_ascii_strtod (load_bridge, NULL) == 0)
597 return adaptor_init (argc, argv);
603 gnome_accessibility_module_init (void)
605 const gchar *load_bridge = g_getenv ("NO_AT_BRIDGE");
607 if (!load_bridge || g_ascii_strtod (load_bridge, NULL) == 0)
609 adaptor_init (NULL, NULL);
611 if (g_getenv ("AT_SPI_DEBUG"))
613 g_print ("Atk Accessibility bridge initialized\n");
619 gnome_accessibility_module_shutdown (void)
621 spi_atk_deregister_event_listeners ();
625 /*END------------------------------------------------------------------------*/