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 ());
123 g_warning ("AT_SPI: Could not get the display\n");
127 AT_SPI_BUS = XInternAtom (bridge_display, "AT_SPI_BUS", False);
128 XGetWindowProperty (bridge_display,
129 XDefaultRootWindow (bridge_display),
131 (long) BUFSIZ, False,
132 (Atom) 31, &actual_type, &actual_format,
133 &nitems, &leftover, &data);
135 dbus_error_init (&error);
140 ("AT-SPI: Accessibility bus not found - Using session bus.\n");
141 bus = dbus_bus_get (DBUS_BUS_SESSION, &error);
144 g_warning ("AT-SPI: Couldn't connect to bus: %s\n", error.message);
150 bus = dbus_connection_open (data, &error);
153 g_warning ("AT-SPI: Couldn't connect to bus: %s\n", error.message);
158 if (!dbus_bus_register (bus, &error))
160 g_warning ("AT-SPI: Couldn't register with bus: %s\n", error.message);
170 set_reply (DBusPendingCall *pending, void *user_data)
172 void **replyptr = (void **)user_data;
174 *replyptr = dbus_pending_call_steal_reply (pending);
178 send_and_allow_reentry (DBusConnection *bus, DBusMessage *message, DBusError *error)
180 DBusPendingCall *pending;
181 DBusMessage *reply = NULL;
183 if (!dbus_connection_send_with_reply (bus, message, &pending, -1))
187 dbus_pending_call_set_notify (pending, set_reply, (void *)&reply, NULL);
190 if (!dbus_connection_read_write_dispatch (bus, -1)) return NULL;
194 /*---------------------------------------------------------------------------*/
197 register_reply (DBusPendingCall *pending, void *user_data)
200 SpiBridge *app = user_data;
202 reply = dbus_pending_call_steal_reply (pending);
205 DBusMessageIter iter, iter_struct;
206 gchar *app_name, *obj_path;
208 if (strcmp (dbus_message_get_signature (reply), "(so)") != 0)
210 g_warning ("AT-SPI: Could not obtain desktop path or name\n");
211 dbus_message_unref (reply);
215 dbus_message_iter_init (reply, &iter);
216 dbus_message_iter_recurse (&iter, &iter_struct);
217 dbus_message_iter_get_basic (&iter_struct, &app_name);
218 dbus_message_iter_next (&iter_struct);
219 dbus_message_iter_get_basic (&iter_struct, &obj_path);
221 app->desktop_name = g_strdup (app_name);
222 app->desktop_path = g_strdup (obj_path);
226 g_warning ("AT-SPI: Could not embed inside desktop");
229 dbus_message_unref (reply);
233 register_application (SpiBridge * app)
235 DBusMessage *message, *reply;
236 DBusMessageIter iter;
238 DBusPendingCall *pending;
240 dbus_error_init (&error);
242 /* These will be overridden when we get a reply, but in practice these
243 defaults should always be correct */
244 app->desktop_name = SPI_DBUS_NAME_REGISTRY;
245 app->desktop_path = SPI_DBUS_PATH_ROOT;
247 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
249 SPI_DBUS_INTERFACE_SOCKET,
252 dbus_message_iter_init_append (message, &iter);
253 spi_object_append_reference (&iter, app->root);
255 if (!dbus_connection_send_with_reply (app->bus, message, &pending, -1))
260 dbus_pending_call_set_notify (pending, register_reply, app, NULL);
263 dbus_message_unref (message);
268 /*---------------------------------------------------------------------------*/
271 deregister_application (SpiBridge * app)
273 DBusMessage *message;
274 DBusMessageIter iter;
278 dbus_error_init (&error);
280 message = dbus_message_new_method_call (SPI_DBUS_NAME_REGISTRY,
281 SPI_DBUS_PATH_REGISTRY,
282 SPI_DBUS_INTERFACE_REGISTRY,
283 "DeregisterApplication");
284 dbus_message_set_no_reply (message, TRUE);
286 uname = dbus_bus_get_unique_name (app->bus);
288 dbus_message_iter_init_append (message, &iter);
289 dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &uname);
290 dbus_connection_send (app->bus, message, NULL);
292 dbus_message_unref (message);
295 /*---------------------------------------------------------------------------*/
300 if (!spi_global_app_data)
305 spi_atk_tidy_windows ();
306 spi_atk_deregister_event_listeners ();
307 deregister_application (spi_global_app_data);
309 g_free (spi_global_app_data);
310 spi_global_app_data = NULL;
312 /* Not currently creating an XDisplay */
315 XCloseDisplay (bridge_display);
319 /*---------------------------------------------------------------------------*/
321 static AtkPlugClass *plug_class;
322 static AtkSocketClass *socket_class;
325 get_plug_id (AtkPlug * plug)
327 const char *uname = dbus_bus_get_unique_name (spi_global_app_data->bus);
329 GString *str = g_string_new (NULL);
331 path = spi_register_object_to_path (spi_global_register, G_OBJECT (plug));
332 g_string_printf (str, "%s:%s", uname, path);
334 return g_string_free (str, FALSE);
338 socket_ref_state_set (AtkObject *accessible)
340 char *child_name, *child_path;
341 AtkSocket *socket = ATK_SOCKET (accessible);
345 DBusMessage *message, *reply;
346 DBusMessageIter iter, iter_array;
349 if (!socket->embedded_plug_id)
352 child_name = g_strdup (socket->embedded_plug_id);
355 child_path = g_utf8_strchr (child_name + 1, -1, ':');
361 *(child_path++) = '\0';
362 message = dbus_message_new_method_call (child_name, child_path, SPI_DBUS_INTERFACE_ACCESSIBLE, "GetState");
364 reply = dbus_connection_send_with_reply_and_block (spi_global_app_data->bus, message, 1, NULL);
365 dbus_message_unref (message);
368 if (strcmp (dbus_message_get_signature (reply), "au") != 0)
370 dbus_message_unref (reply);
373 set = atk_state_set_new ();
376 dbus_message_iter_init (reply, &iter);
377 dbus_message_iter_recurse (&iter, &iter_array);
380 dbus_message_iter_get_basic (&iter_array, &v);
381 for (j = 0; j < 32; j++)
385 AtkState state = spi_atk_state_from_spi_state ((count << 5) + j);
386 atk_state_set_add_state (set, state);
391 while (dbus_message_iter_next (&iter_array));
392 dbus_message_unref (reply);
397 socket_embed_hook (AtkSocket * socket, gchar * plug_id)
399 AtkObject *accessible = ATK_OBJECT(socket);
400 gchar *plug_name, *plug_path;
401 AtkObjectClass *klass;
403 /* Force registration */
404 gchar *path = spi_register_object_to_path (spi_global_register, G_OBJECT (accessible));
405 /* Let the plug know that it has been embedded */
406 plug_name = g_strdup (plug_id);
412 plug_path = g_utf8_strchr (plug_name + 1, -1, ':');
415 DBusMessage *message;
416 *(plug_path++) = '\0';
417 message = dbus_message_new_method_call (plug_name, plug_path, SPI_DBUS_INTERFACE_SOCKET, "Embedded");
418 dbus_message_append_args (message, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID);
419 dbus_connection_send (spi_global_app_data->bus, message, NULL);
424 klass = ATK_OBJECT_GET_CLASS (accessible);
425 klass->ref_state_set = socket_ref_state_set;
429 install_plug_hooks ()
433 data = g_type_class_ref (ATK_TYPE_PLUG);
434 plug_class = ATK_PLUG_CLASS (data);
435 data = g_type_class_ref (ATK_TYPE_SOCKET);
436 socket_class = ATK_SOCKET_CLASS (data);
437 plug_class->get_object_id = get_plug_id;
438 socket_class->embed = socket_embed_hook;
441 gchar *atspi_dbus_name = NULL;
442 static gboolean atspi_no_register = FALSE;
444 static GOptionEntry atspi_option_entries[] = {
445 {"atspi-dbus-name", 0, 0, G_OPTION_ARG_STRING, &atspi_dbus_name,
446 "D-Bus bus name to register as", NULL},
447 {"atspi-no-register", 0, 0, G_OPTION_ARG_NONE, &atspi_no_register,
448 "Do not register with Registry Daemon", NULL},
453 introspect_children_cb (const char *path, void *data)
455 if (!strcmp (path, "/org/a11y/atspi/accessible"))
457 return g_strdup ("<node name=\"root\"/>\n");
458 /* TODO: Should we place the whole hierarchy here? */
466 * The following needs to be initialized.
468 * - DRoute for routing message to their accessible objects.
469 * - Event handlers for emmitting signals on specific ATK events.
470 * - Application registration with the AT-SPI registry.
474 adaptor_init (gint * argc, gchar ** argv[])
481 gchar *introspection_directory;
482 static gboolean inited = FALSE;
489 DRoutePath *treepath, *accpath;
491 root = atk_get_root ();
492 g_warn_if_fail (root);
499 /* Parse command line options */
500 opt = g_option_context_new (NULL);
501 g_option_context_add_main_entries (opt, atspi_option_entries, NULL);
502 g_option_context_set_ignore_unknown_options (opt, TRUE);
503 if (!g_option_context_parse (opt, argc, argv, &err))
504 g_warning ("AT-SPI Option parsing failed: %s\n", err->message);
506 /* Allocate global data and do ATK initializations */
507 spi_global_app_data = g_new0 (SpiBridge, 1);
508 atk_misc = atk_misc_get_instance ();
509 spi_global_app_data->root = g_object_ref (root);
511 /* Set up D-Bus connection and register bus name */
512 dbus_error_init (&error);
513 spi_global_app_data->bus = spi_atk_bridge_get_bus ();
514 if (!spi_global_app_data->bus)
516 g_free (spi_global_app_data);
517 spi_global_app_data = NULL;
522 if (atspi_dbus_name != NULL)
524 if (dbus_bus_request_name
525 (spi_global_app_data->bus, atspi_dbus_name, 0, &error))
527 g_print ("AT-SPI Recieved D-Bus name - %s\n", atspi_dbus_name);
532 ("AT-SPI D-Bus name requested but could not be allocated - %s\n",
537 dbus_connection_setup_with_g_main (spi_global_app_data->bus,
538 g_main_context_default ());
540 /* Hook our plug-and socket functions */
541 install_plug_hooks ();
544 * Create the leasing, register and cache objects.
545 * The order is important here, the cache depends on the
548 spi_global_register = g_object_new (SPI_REGISTER_TYPE, NULL);
549 spi_global_leasing = g_object_new (SPI_LEASING_TYPE, NULL);
550 spi_global_cache = g_object_new (SPI_CACHE_TYPE, NULL);
552 /* Register droute for routing AT-SPI messages */
553 spi_global_app_data->droute =
554 droute_new (spi_global_app_data->bus);
556 treepath = droute_add_one (spi_global_app_data->droute,
557 "/org/a11y/atspi/cache", spi_global_cache);
561 g_warning ("atk-bridge: Error in droute_add_one(). Already running?");
565 accpath = droute_add_many (spi_global_app_data->droute,
566 "/org/a11y/atspi/accessible",
568 introspect_children_cb,
570 (DRouteGetDatumFunction)
571 spi_global_register_path_to_object);
574 /* Register all interfaces with droute and set up application accessible db */
575 spi_initialize_cache (treepath);
576 spi_initialize_accessible (accpath);
577 spi_initialize_application (accpath);
578 spi_initialize_action (accpath);
579 spi_initialize_collection (accpath);
580 spi_initialize_component (accpath);
581 spi_initialize_document (accpath);
582 spi_initialize_editabletext (accpath);
583 spi_initialize_hyperlink (accpath);
584 spi_initialize_hypertext (accpath);
585 spi_initialize_image (accpath);
586 spi_initialize_selection (accpath);
587 spi_initialize_socket (accpath);
588 spi_initialize_table (accpath);
589 spi_initialize_text (accpath);
590 spi_initialize_value (accpath);
592 /* Register methods to send D-Bus signals on certain ATK events */
593 spi_atk_register_event_listeners ();
595 /* Register this app by sending a signal out to AT-SPI registry daemon */
596 if (!atspi_no_register && (!root || !ATK_IS_PLUG (root)))
597 register_application (spi_global_app_data);
599 g_atexit (exit_func);
604 /*---------------------------------------------------------------------------*/
607 gtk_module_init (gint * argc, gchar ** argv[])
609 const gchar *load_bridge = g_getenv ("NO_AT_BRIDGE");
611 if (!load_bridge || g_ascii_strtod (load_bridge, NULL) == 0)
613 return adaptor_init (argc, argv);
619 gnome_accessibility_module_init (void)
621 const gchar *load_bridge = g_getenv ("NO_AT_BRIDGE");
623 if (!load_bridge || g_ascii_strtod (load_bridge, NULL) == 0)
625 adaptor_init (NULL, NULL);
627 if (g_getenv ("AT_SPI_DEBUG"))
629 g_print ("Atk Accessibility bridge initialized\n");
635 gnome_accessibility_module_shutdown (void)
637 spi_atk_deregister_event_listeners ();
641 /*END------------------------------------------------------------------------*/