2 * AT-SPI - Assistive Technology Service Provider Interface
3 * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
5 * Copyright 2008 Novell, Inc.
6 * Copyright 2008 Codethink Ltd.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
28 #include "droute-pairhash.h"
30 #define CHUNKS_DEFAULT (512)
32 #define oom() g_error ("D-Bus out of memory, this message will fail anyway")
34 #if defined DROUTE_DEBUG
35 #define _DROUTE_DEBUG(format, args...) g_print (format , ## args)
37 #define _DROUTE_DEBUG(format, args...)
43 GPtrArray *registered_paths;
45 gchar *introspect_dir;
52 GPtrArray *interfaces;
54 GHashTable *properties;
57 DRouteGetDatumFunction get_datum;
60 /*---------------------------------------------------------------------------*/
62 typedef struct PropertyPair
64 DRoutePropertyFunction get;
65 DRoutePropertyFunction set;
68 /*---------------------------------------------------------------------------*/
70 static DBusHandlerResult
71 handle_message (DBusConnection *bus, DBusMessage *message, void *user_data);
74 droute_object_does_not_exist_error (DBusMessage *message);
76 /*---------------------------------------------------------------------------*/
79 path_new (DRouteContext *cnx,
81 DRouteGetDatumFunction get_datum)
85 new_path = g_new0 (DRoutePath, 1);
87 new_path->chunks = g_string_chunk_new (CHUNKS_DEFAULT);
88 new_path->interfaces = g_ptr_array_new ();
90 new_path->methods = g_hash_table_new_full ((GHashFunc)str_pair_hash,
95 new_path->properties = g_hash_table_new_full ((GHashFunc)str_pair_hash,
100 new_path->user_data = user_data;
101 new_path->get_datum = get_datum;
107 path_free (DRoutePath *path, gpointer user_data)
109 g_string_chunk_free (path->chunks);
110 g_ptr_array_free (path->interfaces, TRUE);
111 g_hash_table_destroy (path->methods);
112 g_hash_table_destroy (path->properties);
116 path_get_datum (DRoutePath *path, const gchar *pathstr)
118 if (path->get_datum != NULL)
119 return (path->get_datum) (pathstr, path->user_data);
121 return path->user_data;
124 /*---------------------------------------------------------------------------*/
127 droute_new (DBusConnection *bus, const char *introspect_dir)
131 cnx = g_new0 (DRouteContext, 1);
133 cnx->registered_paths = g_ptr_array_new ();
134 cnx->introspect_dir = g_strdup(introspect_dir);
140 droute_free (DRouteContext *cnx)
142 g_ptr_array_foreach (cnx->registered_paths, (GFunc) path_free, NULL);
143 g_free (cnx->introspect_dir);
147 /*---------------------------------------------------------------------------*/
150 droute_get_bus (DRouteContext *cnx)
155 /*---------------------------------------------------------------------------*/
157 static DBusObjectPathVTable droute_vtable =
161 NULL, NULL, NULL, NULL
165 droute_add_one (DRouteContext *cnx,
169 DRoutePath *new_path;
172 new_path = path_new (cnx, (void *) data, NULL);
174 registered = dbus_connection_register_object_path (cnx->bus, path, &droute_vtable, new_path);
178 g_ptr_array_add (cnx->registered_paths, new_path);
183 droute_add_many (DRouteContext *cnx,
186 const DRouteGetDatumFunction get_datum)
188 DRoutePath *new_path;
190 new_path = path_new (cnx, (void *) data, get_datum);
192 if (!dbus_connection_register_fallback (cnx->bus, path, &droute_vtable, new_path))
195 g_ptr_array_add (cnx->registered_paths, new_path);
199 /*---------------------------------------------------------------------------*/
202 droute_path_add_interface(DRoutePath *path,
204 const DRouteMethod *methods,
205 const DRouteProperty *properties)
209 g_return_if_fail (name != NULL);
211 itf = g_string_chunk_insert (path->chunks, name);
212 g_ptr_array_add (path->interfaces, itf);
214 for (; methods != NULL && methods->name != NULL; methods++)
218 meth = g_string_chunk_insert (path->chunks, methods->name);
219 g_hash_table_insert (path->methods, str_pair_new (itf, meth), methods->func);
222 for (; properties != NULL && properties->name != NULL; properties++)
227 prop = g_string_chunk_insert (path->chunks, properties->name);
228 pair = g_new (PropertyPair, 1);
229 pair->get = properties->get;
230 pair->set = properties->set;
231 g_hash_table_insert (path->properties, str_pair_new (itf, prop), pair);
235 /*---------------------------------------------------------------------------*/
237 /* The data structures don't support an efficient implementation of GetAll
238 * and I don't really care.
241 impl_prop_GetAll (DBusMessage *message,
245 DBusMessageIter iter, iter_dict, iter_dict_entry;
248 GHashTableIter prop_iter;
254 void *datum = path_get_datum (path, pathstr);
256 return droute_object_does_not_exist_error (message);
258 dbus_error_init (&error);
259 if (!dbus_message_get_args
260 (message, &error, DBUS_TYPE_STRING, &iface, DBUS_TYPE_INVALID))
261 return dbus_message_new_error (message, DBUS_ERROR_FAILED, error.message);
263 reply = dbus_message_new_method_return (message);
267 dbus_message_iter_init_append (reply, &iter);
268 if (!dbus_message_iter_open_container
269 (&iter, DBUS_TYPE_ARRAY, "{sv}", &iter_dict))
272 g_hash_table_iter_init (&prop_iter, path->properties);
273 while (g_hash_table_iter_next (&prop_iter, (gpointer*)&key, (gpointer*)&value))
275 if (!g_strcmp0 (key->one, iface))
279 if (!dbus_message_iter_open_container
280 (&iter_dict, DBUS_TYPE_DICT_ENTRY, NULL, &iter_dict_entry))
282 dbus_message_iter_append_basic (&iter_dict_entry, DBUS_TYPE_STRING,
284 (value->get) (&iter_dict_entry, datum);
285 if (!dbus_message_iter_close_container (&iter_dict, &iter_dict_entry))
290 if (!dbus_message_iter_close_container (&iter, &iter_dict))
296 impl_prop_GetSet (DBusMessage *message,
301 DBusMessage *reply = NULL;
305 PropertyPair *prop_funcs = NULL;
309 dbus_error_init (&error);
310 if (!dbus_message_get_args (message,
317 return dbus_message_new_error (message, DBUS_ERROR_FAILED, error.message);
319 _DROUTE_DEBUG ("DRoute (handle prop): %s|%s on %s\n", pair.one, pair.two, pathstr);
321 prop_funcs = (PropertyPair *) g_hash_table_lookup (path->properties, &pair);
323 return dbus_message_new_error (message, DBUS_ERROR_FAILED, "Property unavailable");
325 datum = path_get_datum (path, pathstr);
327 return droute_object_does_not_exist_error (message);
329 if (get && prop_funcs->get)
332 DBusMessageIter iter;
334 _DROUTE_DEBUG ("DRoute (handle prop Get): %s|%s on %s\n", pair.one, pair.two, pathstr);
336 reply = dbus_message_new_method_return (message);
337 dbus_message_iter_init_append (reply, &iter);
338 if (!(prop_funcs->get) (&iter, datum))
340 dbus_message_unref (reply);
341 reply = dbus_message_new_error (message, DBUS_ERROR_FAILED, "Get failed");
344 else if (!get && prop_funcs->set)
346 DBusMessageIter iter;
348 _DROUTE_DEBUG ("DRoute (handle prop Get): %s|%s on %s\n", pair.one, pair.two, pathstr);
350 dbus_message_iter_init (message, &iter);
351 /* Skip the interface and property name */
352 dbus_message_iter_next(&iter);
353 dbus_message_iter_next(&iter);
354 (prop_funcs->set) (&iter, datum);
356 reply = dbus_message_new_method_return (message);
360 reply = dbus_message_new_error (message, DBUS_ERROR_FAILED, "Getter or setter unavailable");
366 static DBusHandlerResult
367 handle_properties (DBusConnection *bus,
368 DBusMessage *message,
372 const gchar *pathstr)
375 DBusHandlerResult result = DBUS_HANDLER_RESULT_HANDLED;
377 if (!g_strcmp0(member, "GetAll"))
378 reply = impl_prop_GetAll (message, path, pathstr);
379 else if (!g_strcmp0 (member, "Get"))
380 reply = impl_prop_GetSet (message, path, pathstr, TRUE);
381 else if (!g_strcmp0 (member, "Set"))
382 reply = impl_prop_GetSet (message, path, pathstr, FALSE);
384 result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
388 dbus_connection_send (bus, reply, NULL);
389 dbus_message_unref (reply);
395 /*---------------------------------------------------------------------------*/
397 static const char *introspection_header =
398 "<?xml version=\"1.0\"?>\n";
400 static const char *introspection_node_element =
401 "<node name=\"%s\">\n";
403 static const char *introspection_footer =
407 append_interface (GString *str,
408 const gchar *interface,
409 const gchar *directory)
417 filename = g_build_filename (directory, interface, NULL);
419 if (g_file_get_contents (filename, &contents, &len, &err))
421 g_string_append_len (str, contents, len);
425 g_warning ("AT-SPI: Cannot find introspection XML file %s - %s",
426 filename, err->message);
430 g_string_append (str, "\n");
435 static DBusHandlerResult
436 handle_introspection (DBusConnection *bus,
437 DBusMessage *message,
441 const gchar *pathstr)
449 _DROUTE_DEBUG ("DRoute (handle introspection): %s\n", pathstr);
451 if (g_strcmp0 (member, "Introspect"))
452 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
454 output = g_string_new(introspection_header);
456 g_string_append_printf(output, introspection_node_element, pathstr);
458 for (i=0; i < path->interfaces->len; i++)
460 gchar *interface = (gchar *) g_ptr_array_index (path->interfaces, i);
461 _DROUTE_DEBUG ("DRoute (appending interface): %s\n", interface);
462 append_interface(output, interface, path->cnx->introspect_dir);
465 g_string_append(output, introspection_footer);
466 final = g_string_free(output, FALSE);
468 reply = dbus_message_new_method_return (message);
471 dbus_message_append_args(reply, DBUS_TYPE_STRING, &final,
473 dbus_connection_send (bus, reply, NULL);
475 dbus_message_unref (reply);
477 return DBUS_HANDLER_RESULT_HANDLED;
480 /*---------------------------------------------------------------------------*/
482 static DBusHandlerResult
483 handle_other (DBusConnection *bus,
484 DBusMessage *message,
488 const gchar *pathstr)
490 gint result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
494 DBusMessage *reply = NULL;
501 _DROUTE_DEBUG ("DRoute (handle other): %s|%s on %s\n", member, iface, pathstr);
503 func = (DRouteFunction) g_hash_table_lookup (path->methods, &pair);
506 datum = path_get_datum (path, pathstr);
508 reply = droute_object_does_not_exist_error (message);
510 reply = (func) (bus, message, datum);
514 /* All D-Bus method calls must have a reply.
515 * If one is not provided presume that the call has a void
516 * return and no error has occured.
518 reply = dbus_message_new_method_return (message);
520 dbus_connection_send (bus, reply, NULL);
521 dbus_message_unref (reply);
522 result = DBUS_HANDLER_RESULT_HANDLED;
525 _DROUTE_DEBUG ("DRoute (handle other) (reply): type %d\n",
526 dbus_message_get_type(reply));
530 /*---------------------------------------------------------------------------*/
532 static DBusHandlerResult
533 handle_message (DBusConnection *bus, DBusMessage *message, void *user_data)
535 DRoutePath *path = (DRoutePath *) user_data;
536 const gchar *iface = dbus_message_get_interface (message);
537 const gchar *member = dbus_message_get_member (message);
538 const gint type = dbus_message_get_type (message);
539 const gchar *pathstr = dbus_message_get_path (message);
541 DBusHandlerResult result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
543 _DROUTE_DEBUG ("DRoute (handle message): %s|%s of type %d on %s\n", member, iface, type, pathstr);
545 /* Check for basic reasons not to handle */
546 if (type != DBUS_MESSAGE_TYPE_METHOD_CALL ||
551 if (!strcmp (iface, "org.freedesktop.DBus.Properties"))
552 result = handle_properties (bus, message, path, iface, member, pathstr);
553 else if (!strcmp (iface, "org.freedesktop.DBus.Introspectable"))
554 result = handle_introspection (bus, message, path, iface, member, pathstr);
556 result = handle_other (bus, message, path, iface, member, pathstr);
558 if (result == DBUS_HANDLER_RESULT_NOT_YET_HANDLED)
559 g_print ("DRoute | Unhandled message: %s|%s of type %d on %s\n", member, iface, type, pathstr);
565 /*---------------------------------------------------------------------------*/
568 droute_object_does_not_exist_error (DBusMessage *message)
573 errmsg= g_strdup_printf (
574 "Method \"%s\" with signature \"%s\" on interface \"%s\" could not be processed as object %s does not exist\n",
575 dbus_message_get_member (message),
576 dbus_message_get_signature (message),
577 dbus_message_get_interface (message),
578 dbus_message_get_path (message));
579 reply = dbus_message_new_error (message,
586 /*---------------------------------------------------------------------------*/
589 droute_not_yet_handled_error (DBusMessage *message)
594 errmsg= g_strdup_printf (
595 "Method \"%s\" with signature \"%s\" on interface \"%s\" doesn't exist\n",
596 dbus_message_get_member (message),
597 dbus_message_get_signature (message),
598 dbus_message_get_interface (message));
599 reply = dbus_message_new_error (message,
600 DBUS_ERROR_UNKNOWN_METHOD,
607 droute_out_of_memory_error (DBusMessage *message)
612 errmsg= g_strdup_printf (
613 "Method \"%s\" with signature \"%s\" on interface \"%s\" could not be processed due to lack of memory\n",
614 dbus_message_get_member (message),
615 dbus_message_get_signature (message),
616 dbus_message_get_interface (message));
617 reply = dbus_message_new_error (message,
618 DBUS_ERROR_NO_MEMORY,
625 droute_invalid_arguments_error (DBusMessage *message)
630 errmsg= g_strdup_printf (
631 "Method \"%s\" with signature \"%s\" on interface \"%s\" was supplied with invalid arguments\n",
632 dbus_message_get_member (message),
633 dbus_message_get_signature (message),
634 dbus_message_get_interface (message));
635 reply = dbus_message_new_error (message,
636 DBUS_ERROR_INVALID_ARGS,
642 /*END------------------------------------------------------------------------*/