2 * AT-SPI - Assistive Technology Service Provider Interface
3 * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
5 * Copyright 2001 Sun Microsystems Inc.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 * registry.c: the main accessibility service registry implementation
31 #include <bonobo/Bonobo.h>
34 * This pulls the CORBA definitions for the "Accessibility::Registry" server
36 #include <libspi/Accessibility.h>
39 * We'd like to replace the dependance on X-isms with a wrapper layer,
40 * to the extent that it can't be done with pure GDK.
41 * Anyone want to help?
47 * This pulls the definition for the BonoboObject (GType)
52 * Our parent GObject type
54 #define PARENT_TYPE LISTENER_TYPE
57 * A pointer to our parent object class
59 static ListenerClass *registry_parent_class;
70 EventTypeCategory type_cat;
78 Accessibility_EventListener listener;
79 guint event_type_hash;
80 EventTypeCategory event_type_cat;
83 /* static function prototypes */
84 static void _registry_notify_listeners ( GList *listeners,
85 const Accessibility_Event *e,
86 CORBA_Environment *ev);
88 static long _get_unique_id();
90 static gboolean _device_event_controller_hook (gpointer source);
93 * Implemented GObject::finalize
96 registry_object_finalize (GObject *object)
98 /* Registry *registry = REGISTRY (object); */
99 GObjectClass *object_class = G_OBJECT_GET_CLASS( object);
101 printf("registry_object_finalize called\n");
103 object_class->finalize (object);
107 * registerApplication:
108 * @application: a reference to the requesting @Application
109 * return values: void
111 * Register a new application with the accessibility broker.
115 impl_accessibility_registry_register_application (PortableServer_Servant servant,
116 const Accessibility_Application application,
117 CORBA_Environment * ev)
119 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
122 fprintf (stderr, "registering app %p\n", application);
124 registry->desktop->applications = g_list_append (registry->desktop->applications,
125 CORBA_Object_duplicate (application, ev));
127 /* TODO: create unique string here (with libuuid call ?) and hash ? */
128 Accessibility_Application__set_id (application, _get_unique_id(), ev);
131 * TODO: change the implementation below to a WM-aware one;
132 * e.g. don't add all apps to the Desktop
137 compare_corba_objects (gconstpointer p1, gconstpointer p2)
139 CORBA_Environment ev;
141 retval = !CORBA_Object_is_equivalent ((CORBA_Object) p1, (CORBA_Object) p2, &ev);
144 fprintf (stderr, "comparing %p to %p; result %d\n",
152 register_with_toolkits (Registry *registry_bonobo_object, EventTypeStruct *etype, CORBA_Environment *ev)
157 Accessibility_Desktop desktop;
158 Accessibility_Application app;
159 Accessibility_Registry registry;
160 registry = bonobo_object_corba_objref (bonobo_object (registry_bonobo_object));
162 /* for each app in each desktop, call ...Application_registerToolkitEventListener */
164 n_desktops = Accessibility_Registry_getDesktopCount (registry, ev);
166 for (i=0; i<n_desktops; ++i)
168 desktop = Accessibility_Registry_getDesktop (registry, i, ev);
169 n_apps = Accessibility_Desktop__get_childCount (desktop, ev);
170 for (j=0; j<n_apps; ++j)
172 app = (Accessibility_Application) Accessibility_Desktop_getChildAtIndex (desktop,
175 /* TODO: should we be ref-ing the registry object before each call ? */
176 Accessibility_Application_registerToolkitEventListener (app,
178 CORBA_string_dup (etype->event_name),
185 compare_listener_hash (gconstpointer p1, gconstpointer p2)
187 return (((ListenerStruct *)p2)->event_type_hash - ((ListenerStruct *)p1)->event_type_hash);
191 parse_event_type (EventTypeStruct *etype, char *event_name)
194 gchar **split_string;
196 split_string = g_strsplit(event_name, ":", 4);
197 etype->event_name = g_strndup(event_name, 255);
199 if (!g_ascii_strncasecmp (event_name, "focus:", 6))
201 etype->type_cat = ETYPE_FOCUS;
203 else if (!g_ascii_strncasecmp (event_name, "window:", 7))
205 etype->type_cat = ETYPE_WINDOW;
209 etype->type_cat = ETYPE_TOOLKIT;
214 etype->major = split_string[1];
217 etype->minor = split_string[2];
220 etype->detail = split_string[3];
221 etype->hash = g_str_hash ( g_strconcat (split_string[1], split_string[2], split_string[3], NULL));
225 etype->detail = g_strdup ("");
226 etype->hash = g_str_hash ( g_strconcat (split_string[1], split_string[2], NULL));
231 etype->minor = g_strdup ("");
232 etype->hash = g_str_hash ( split_string[1]);
237 etype->major = g_strdup ("");
238 etype->minor = g_strdup ("");
239 etype->detail = g_strdup ("");
240 etype->hash = g_str_hash ("");
243 /* TODO: don't forget to free the strings from caller when done ! */
247 * deregisterApplication:
248 * @application: a reference to the @Application
249 * to be deregistered.
250 * return values: void
252 * De-register an application previously registered with the broker.
256 impl_accessibility_registry_deregister_application (PortableServer_Servant servant,
257 const Accessibility_Application application,
258 CORBA_Environment * ev)
260 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
261 GList *list = g_list_find_custom (registry->desktop->applications, application, compare_corba_objects);
270 fprintf (stderr, "deregistering application %p\n", application);
272 registry->desktop->applications = g_list_delete_link (registry->desktop->applications, list);
274 fprintf (stderr, "there are now %d apps registered.\n", g_list_length (registry->desktop->applications));
275 for (i = 0; i < g_list_length (registry->desktop->applications); ++i) {
276 fprintf (stderr, "getting application %d\n", i);
277 fprintf (stderr, "object address %p\n",
278 g_list_nth_data (registry->desktop->applications, i));
283 fprintf (stderr, "could not deregister application\n");
287 * CORBA Accessibility::Registry::registerGlobalEventListener method implementation
290 impl_accessibility_registry_register_global_event_listener (
291 PortableServer_Servant servant,
292 Accessibility_EventListener listener,
293 const CORBA_char *event_name,
294 CORBA_Environment *ev)
296 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
297 ListenerStruct *ls = g_malloc (sizeof (ListenerStruct));
298 EventTypeStruct etype;
300 fprintf(stderr, "registering for events of type %s\n", event_name);
302 /* parse, check major event type and add listener accordingly */
303 parse_event_type (&etype, event_name);
304 ls->event_type_hash = etype.hash;
305 ls->event_type_cat = etype.type_cat;
307 switch (etype.type_cat)
310 ls->listener = CORBA_Object_duplicate (listener, ev);
311 registry->focus_listeners =
312 g_list_append (registry->focus_listeners, ls);
314 case (ETYPE_WINDOW) :
315 /* Support for Window Manager Events is not yet implemented */
317 case (ETYPE_TOOLKIT) :
318 ls->listener = CORBA_Object_duplicate (listener, ev);
319 registry->toolkit_listeners =
320 g_list_append (registry->toolkit_listeners, ls);
321 register_with_toolkits (registry, &etype, ev);
329 * CORBA Accessibility::Registry::deregisterGlobalEventListenerAll method implementation
332 impl_accessibility_registry_deregister_global_event_listener_all (
333 PortableServer_Servant servant,
334 Accessibility_EventListener listener,
335 CORBA_Environment *ev)
337 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
338 GList *list = g_list_find_custom (registry->focus_listeners, listener, compare_corba_objects);
341 * TODO : de-register with toolkit if the last instance of a listener
342 * to a particular toolkit event type has been deregistered.
347 fprintf (stderr, "deregistering listener\n");
348 registry->focus_listeners = g_list_delete_link (registry->focus_listeners, list);
349 list = g_list_find_custom (registry->focus_listeners, listener, compare_corba_objects);
351 list = g_list_find_custom (registry->toolkit_listeners, listener, compare_corba_objects);
354 fprintf (stderr, "deregistering listener\n");
355 registry->toolkit_listeners = g_list_delete_link (registry->toolkit_listeners, list);
356 list = g_list_find_custom (registry->toolkit_listeners, listener, compare_corba_objects);
361 * CORBA Accessibility::Registry::deregisterGlobalEventListener method implementation
364 impl_accessibility_registry_deregister_global_event_listener (
365 PortableServer_Servant servant,
366 Accessibility_EventListener listener,
367 const CORBA_char * event_name,
368 CORBA_Environment *ev)
370 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
372 EventTypeStruct etype;
376 parse_event_type (&etype, event_name);
377 switch (etype.type_cat)
380 listeners = ®istry->focus_listeners;
382 case (ETYPE_WINDOW) :
383 /* Support for Window Manager Events is not yet implemented */
385 case (ETYPE_TOOLKIT) :
386 listeners = ®istry->toolkit_listeners;
392 ls.event_type_hash = etype.hash;
393 list = g_list_find_custom (*listeners, &ls, compare_listener_hash);
397 fprintf (stderr, "deregistering listener\n");
398 *listeners = g_list_delete_link (*listeners, list);
399 list = g_list_find_custom (*listeners, &ls, compare_listener_hash);
406 * return values: a short integer indicating the current number of
409 * Get the current number of desktops.
413 impl_accessibility_registry_get_desktop_count (PortableServer_Servant servant,
414 CORBA_Environment * ev)
416 /* TODO: implement support for multiple virtual desktops */
417 CORBA_short n_desktops;
418 n_desktops = (CORBA_short) 1;
424 * @n: the index of the requested @Desktop.
425 * return values: a reference to the requested @Desktop.
427 * Get the nth accessible desktop.
430 static Accessibility_Desktop
431 impl_accessibility_registry_get_desktop (PortableServer_Servant servant,
433 CORBA_Environment * ev)
435 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
437 /* TODO: implement support for multiple virtual desktops */
440 return (Accessibility_Desktop)
441 CORBA_Object_duplicate (
442 bonobo_object_corba_objref (bonobo_object (registry->desktop)), ev);
446 return (Accessibility_Desktop) CORBA_OBJECT_NIL;
452 * return values: a sequence containing references to
455 * Get a list of accessible desktops.
458 static Accessibility_DesktopSeq *
459 impl_accessibility_registry_get_desktop_list (PortableServer_Servant servant,
460 CORBA_Environment * ev)
462 /* TODO: implement support for multiple virtual desktops */
463 return (Accessibility_DesktopSeq *) NULL;
466 static Accessibility_DeviceEventController
467 impl_accessibility_registry_get_device_event_controller (PortableServer_Servant servant,
468 CORBA_Environment * ev)
470 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
471 if (!registry->device_event_controller)
472 registry->device_event_controller = g_object_new (DEVICE_EVENT_CONTROLLER_TYPE, NULL);
473 return CORBA_Object_duplicate (
474 bonobo_object_corba_objref (
475 bonobo_object (registry->device_event_controller)), ev);
479 impl_registry_notify_event (PortableServer_Servant servant,
480 const Accessibility_Event *e,
481 CORBA_Environment *ev)
483 Registry *registry = REGISTRY (bonobo_object_from_servant (servant));
484 EventTypeStruct etype;
486 parse_event_type (&etype, e->type);
488 switch (etype.type_cat)
491 _registry_notify_listeners (registry->focus_listeners, e, ev);
493 case (ETYPE_WINDOW) :
494 _registry_notify_listeners (registry->window_listeners, e, ev);
496 case (ETYPE_TOOLKIT) :
497 _registry_notify_listeners (registry->toolkit_listeners, e, ev);
502 Accessibility_Accessible_unref (e->source, ev);
513 _registry_notify_listeners ( GList *listeners,
514 const Accessibility_Event *e,
515 CORBA_Environment *ev)
520 EventTypeStruct etype;
522 parse_event_type (&etype, e->type);
523 minor_hash = g_str_hash (g_strconcat (etype.major, etype.minor, NULL));
524 len = g_list_length (listeners);
526 for (n=0; n<len; ++n)
528 ls = (ListenerStruct *) g_list_nth_data (listeners, n);
530 fprintf(stderr, "event hashes: %lx %lx %lx\n", ls->event_type_hash, etype.hash, minor_hash);
531 fprintf(stderr, "event name: %s\n", etype.event_name);
533 if ((ls->event_type_hash == etype.hash) || (ls->event_type_hash == minor_hash))
536 fprintf(stderr, "notifying listener #%d\n", n);
537 fprintf(stderr, "event name %s\n", Accessibility_Accessible__get_name(e->source, ev));
539 Accessibility_Accessible_ref ( e->source, ev);
540 Accessibility_EventListener_notifyEvent ((Accessibility_EventListener) ls->listener,
543 if (ev->_major != CORBA_NO_EXCEPTION) {
545 ("Accessibility app error: exception during event notification: %s\n"),
546 CORBA_exception_id(ev));
553 static gboolean _device_event_controller_hook (gpointer p)
555 Registry *registry = (Registry *)p;
556 DeviceEventController *controller = registry->device_event_controller;
558 device_event_controller_check_key_event (controller);
563 registry_class_init (RegistryClass *klass)
565 GObjectClass * object_class = (GObjectClass *) klass;
566 POA_Accessibility_Registry__epv *epv = &klass->epv;
568 registry_parent_class = g_type_class_ref (LISTENER_TYPE);
570 object_class->finalize = registry_object_finalize;
572 epv->registerApplication = impl_accessibility_registry_register_application;
573 epv->deregisterApplication = impl_accessibility_registry_deregister_application;
574 epv->registerGlobalEventListener = impl_accessibility_registry_register_global_event_listener;
575 epv->deregisterGlobalEventListener = impl_accessibility_registry_deregister_global_event_listener;
576 epv->deregisterGlobalEventListenerAll = impl_accessibility_registry_deregister_global_event_listener_all;
577 epv->getDeviceEventController = impl_accessibility_registry_get_device_event_controller;
578 epv->getDesktopCount = impl_accessibility_registry_get_desktop_count;
579 epv->getDesktop = impl_accessibility_registry_get_desktop;
580 epv->getDesktopList = impl_accessibility_registry_get_desktop_list;
582 ((ListenerClass *) klass)->epv.notifyEvent = impl_registry_notify_event;
586 registry_init (Registry *registry)
588 registry->focus_listeners = NULL;
589 registry->window_listeners = NULL;
590 registry->toolkit_listeners = NULL;
591 registry->applications = NULL;
592 registry->desktop = desktop_new();
593 registry->device_event_controller = NULL;
594 registry->kbd_event_hook = _device_event_controller_hook;
598 registry_get_type (void)
600 static GType type = 0;
603 static const GTypeInfo tinfo = {
604 sizeof (RegistryClass),
605 (GBaseInitFunc) NULL,
606 (GBaseFinalizeFunc) NULL,
607 (GClassInitFunc) registry_class_init,
608 (GClassFinalizeFunc) NULL,
609 NULL, /* class data */
612 (GInstanceInitFunc) registry_init,
613 NULL /* value table */
616 * Here we use bonobo_type_unique instead of
617 * gtk_type_unique, this auto-generates a load of
618 * CORBA structures for us. All derived types must
619 * use bonobo_type_unique.
621 type = bonobo_type_unique (
623 POA_Accessibility_Registry__init,
625 G_STRUCT_OFFSET (RegistryClass, epv),
637 REGISTRY (g_object_new (registry_get_type (), NULL));