libspi/application.c

   1 /*
   2  * AT-SPI - Assistive Technology Service Provider Interface
   3  * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
   4  *
   5  * Copyright 2001, 2002 Sun Microsystems Inc.,
   6  * Copyright 2001, 2002 Ximian, Inc.
   7  *
   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.
  12  *
  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.
  17  *
  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.
  22  */
  23
  24 /* application.c: implements SpiApplication.idl */
  25
  26 #include <string.h>
  27 #include <config.h>
  28 #include <atk/atkutil.h>
  29 #include <libspi/application.h>
  30
  31 /* Our parent Gtk object type */
  32 #define PARENT_TYPE SPI_ACCESSIBLE_TYPE
  33
  34 /* A pointer to our parent object class */
  35 static SpiAccessibleClass *spi_application_parent_class;
  36
  37 static SpiApplication *the_app;
  38
  39 /* static methods */
  40
  41 static void notify_listeners (GList *listeners,
  42                               SpiAccessible *source,
  43                               Accessibility_Event *e);
  44
  45 static const char *reverse_lookup_name_for_toolkit_event (char *toolkit_name);
  46
  47 static const char *
  48 lookup_toolkit_event_for_name (const char *generic_name)
  49 {
  50   char *toolkit_specific_name;
  51   SpiApplicationClass *klass = g_type_class_peek (SPI_APPLICATION_TYPE);
  52 #ifdef SPI_DEBUG
  53   fprintf (stderr, "looking for %s in hash table.\n", generic_name);
  54 #endif
  55   toolkit_specific_name =
  56     (char *) g_hash_table_lookup (klass->toolkit_event_names, generic_name);
  57 #ifdef SPI_DEBUG
  58   fprintf (stderr, "generic event %s converted to %s\n", generic_name, toolkit_specific_name);
  59 #endif
  60   return toolkit_specific_name;
  61 }
  62
  63 /*
  64  * Implemented GObject::finalize
  65  */
  66 static void
  67 spi_accessible_application_finalize (GObject *object)
  68 {
  69   GList *l;
  70   SpiApplication *application = (SpiApplication *) object;
  71   CORBA_Environment ev;
  72
  73   CORBA_exception_init (&ev);
  74
  75   for (l = application->toolkit_listeners; l; l = l->next)
  76     {
  77       CORBA_Object_release ((CORBA_Object) l->data, &ev);
  78     }
  79
  80   CORBA_exception_free (&ev);
  81
  82   g_list_free (application->toolkit_listeners);
  83   application->toolkit_listeners = NULL;
  84
  85   g_print ("application finalize called\n");
  86   (G_OBJECT_CLASS (spi_application_parent_class))->finalize (object);
  87 }
  88
  89 static CORBA_string
  90 impl_accessibility_application_get_toolkit_name (PortableServer_Servant servant,
  91                                                  CORBA_Environment     *ev)
  92 {
  93   return CORBA_string_dup (atk_get_toolkit_name ());
  94 }
  95
  96 static CORBA_string
  97 impl_accessibility_application_get_version (PortableServer_Servant servant,
  98                                             CORBA_Environment     *ev)
  99 {
 100   return CORBA_string_dup (atk_get_toolkit_version ());
 101 }
 102
 103 static CORBA_long
 104 impl_accessibility_application_get_id (PortableServer_Servant servant,
 105                                        CORBA_Environment     *ev)
 106 {
 107   SpiApplication *application = SPI_APPLICATION (
 108     bonobo_object_from_servant (servant));
 109
 110   return application->id;
 111 }
 112
 113 static void
 114 impl_accessibility_application_set_id (PortableServer_Servant servant,
 115                                        const CORBA_long id,
 116                                        CORBA_Environment *ev)
 117 {
 118   SpiApplication *application = SPI_APPLICATION (
 119     bonobo_object_from_servant (servant));
 120
 121   application->id = id;
 122 }
 123
 124 static AtkObject *
 125 get_atk_object_ref (GObject *gobject)
 126 {
 127   AtkObject *aobject;
 128
 129   if (ATK_IS_IMPLEMENTOR (gobject))
 130     {
 131       aobject = atk_implementor_ref_accessible (ATK_IMPLEMENTOR (gobject));
 132     }
 133   else if (ATK_IS_OBJECT (gobject))
 134     {
 135       aobject = ATK_OBJECT (gobject);
 136       g_object_ref (G_OBJECT (aobject));
 137     }
 138   else
 139     {
 140       aobject = NULL;
 141       g_error ("received event from non-AtkImplementor");
 142     }
 143
 144   return aobject;
 145 }
 146
 147 static gboolean
 148 spi_application_object_event_listener (GSignalInvocationHint *signal_hint,
 149                                        guint                   n_param_values,
 150                                        const GValue           *param_values,
 151                                        gpointer                data)
 152 {
 153   Accessibility_Event e;
 154   AtkObject     *aobject;
 155   SpiAccessible *source;
 156   GSignalQuery   signal_query;
 157   gchar         *event_name;
 158   const char    *generic_name;
 159
 160   g_return_val_if_fail (the_app != NULL, FALSE);
 161
 162   g_signal_query (signal_hint->signal_id, &signal_query);
 163
 164   /* TODO: move GTK reference out of app.c into bridge */
 165   event_name = g_strdup_printf ("Gtk:%s:%s",
 166                                 g_type_name (signal_query.itype),
 167                                 signal_query.signal_name);
 168
 169   generic_name = reverse_lookup_name_for_toolkit_event (event_name);
 170
 171   fprintf (stderr, "Received (object) signal %s maps to '%s'\n",
 172            event_name, generic_name);
 173
 174   g_free (event_name);
 175
 176   g_return_val_if_fail (generic_name, FALSE);
 177
 178   aobject = get_atk_object_ref (g_value_get_object (param_values + 0));
 179
 180   source = spi_accessible_new (aobject);
 181   e.type = CORBA_string_dup (generic_name);
 182   e.source = CORBA_OBJECT_NIL;
 183   e.detail1 = 0;
 184   e.detail2 = 0;
 185
 186   notify_listeners (the_app->toolkit_listeners, source, &e);
 187
 188   bonobo_object_unref (BONOBO_OBJECT (source));
 189
 190   g_object_unref (G_OBJECT (aobject));
 191
 192   return TRUE;
 193 }
 194
 195 static gboolean
 196 spi_application_toolkit_event_listener (GSignalInvocationHint *signal_hint,
 197                                         guint                  n_param_values,
 198                                         const GValue          *param_values,
 199                                         gpointer               data)
 200 {
 201   Accessibility_Event e;
 202   AtkObject      *aobject;
 203   SpiAccessible *source;
 204   GSignalQuery   signal_query;
 205   char          *event_name;
 206
 207   g_return_val_if_fail (the_app != NULL, FALSE);
 208
 209   g_signal_query (signal_hint->signal_id, &signal_query);
 210
 211   /* TODO: move GTK reference out of app.c into bridge */
 212   event_name = g_strdup_printf ("Gtk:%s:%s",
 213                                 g_type_name (signal_query.itype),
 214                                 signal_query.signal_name);
 215
 216 #ifdef SPI_DEBUG
 217   fprintf (stderr, "Received signal %s\n", event_name);
 218 #endif
 219
 220   aobject = get_atk_object_ref (g_value_get_object (param_values + 0));
 221
 222   source = spi_accessible_new (aobject);
 223   e.type = CORBA_string_dup (event_name);
 224   e.source = CORBA_OBJECT_NIL;
 225   e.detail1 = 0;
 226   e.detail2 = 0;
 227   notify_listeners (the_app->toolkit_listeners, source, &e);
 228
 229   bonobo_object_unref (BONOBO_OBJECT (source));
 230   g_object_unref (G_OBJECT (aobject));
 231
 232   g_free (event_name);
 233
 234   return TRUE;
 235 }
 236
 237 static void
 238 impl_accessibility_application_register_toolkit_event_listener (PortableServer_Servant servant,
 239                                                                 Accessibility_EventListener listener,
 240                                                                 const CORBA_char *event_name,
 241                                                                 CORBA_Environment *ev)
 242 {
 243   guint spi_listener_id;
 244   spi_listener_id =
 245      atk_add_global_event_listener (spi_application_toolkit_event_listener, event_name);
 246   the_app->toolkit_listeners = g_list_append (the_app->toolkit_listeners,
 247                                               CORBA_Object_duplicate (listener, ev));
 248 #ifdef SPI_DEBUG
 249   fprintf (stderr, "registered %d for toolkit events named: %s\n",
 250            spi_listener_id,
 251            event_name);
 252 #endif
 253 }
 254
 255 static void
 256 impl_accessibility_application_register_object_event_listener (PortableServer_Servant servant,
 257                                                                Accessibility_EventListener listener,
 258                                                                const CORBA_char *event_name,
 259                                                                CORBA_Environment *ev)
 260 {
 261   guint spi_listener_id = 0;
 262   const char *toolkit_specific_event_name =
 263           lookup_toolkit_event_for_name (event_name);
 264   if (toolkit_specific_event_name)
 265   {
 266     spi_listener_id =
 267        atk_add_global_event_listener (spi_application_object_event_listener,
 268                                       toolkit_specific_event_name);
 269     the_app->toolkit_listeners = g_list_append (the_app->toolkit_listeners,
 270                                               CORBA_Object_duplicate (listener, ev));
 271   }
 272 #ifdef SPI_DEBUG
 273   fprintf (stderr, "registered %d for object events named: %s\n",
 274            spi_listener_id,
 275            event_name);
 276 #endif
 277 }
 278
 279 static void
 280 notify_listeners (GList *listeners, SpiAccessible *source, Accessibility_Event *e)
 281 {
 282   GList *l;
 283   CORBA_Environment ev;
 284
 285   CORBA_exception_init (&ev);
 286
 287   for (l = listeners; l; l = l->next)
 288     {
 289       Accessibility_EventListener listener = l->data;
 290
 291       e->source = bonobo_object_dup_ref (BONOBO_OBJREF (source), &ev);
 292
 293       Accessibility_EventListener_notifyEvent (listener, e, &ev);
 294       /*
 295        * when this (oneway) call completes, the CORBA refcount and
 296        * Bonobo_Unknown refcount will be decremented by the recipient
 297        */
 298       CORBA_exception_free (&ev);
 299     }
 300 }
 301
 302 static const char *
 303 reverse_lookup_name_for_toolkit_event (char *toolkit_specific_name)
 304 {
 305     const char *generic_name;
 306     SpiApplicationClass *klass = g_type_class_peek (SPI_APPLICATION_TYPE);
 307 #ifdef SPI_DEBUG
 308     fprintf (stderr, "(reverse lookup) looking for %s in hash table.\n", toolkit_specific_name);
 309 #endif
 310     generic_name =
 311             (const char *) g_hash_table_lookup (klass->generic_event_names, toolkit_specific_name);
 312 #ifdef SPI_DEBUG
 313     fprintf (stderr, "toolkit event %s converted to %s\n", toolkit_specific_name, generic_name);
 314 #endif
 315     return generic_name;
 316 }
 317
 318 static void
 319 init_toolkit_names (GHashTable **generic_event_names, GHashTable **toolkit_event_names)
 320 {
 321         *toolkit_event_names = g_hash_table_new (g_str_hash, g_str_equal);
 322         *generic_event_names = g_hash_table_new (g_str_hash, g_str_equal);
 323         g_hash_table_insert (*toolkit_event_names,
 324                              "object:property-change",
 325                              "Gtk:AtkObject:property-change");
 326         g_hash_table_insert (*generic_event_names,
 327                              "Gtk:AtkObject:property-change",
 328                              "object:property-change");
 329 #ifdef SPI_DEBUG
 330         fprintf (stderr, "inserted spi_selection_changed hash\n");
 331 #endif
 332 }
 333
 334 static void
 335 spi_application_class_init (SpiApplicationClass *klass)
 336 {
 337   GObjectClass * object_class = (GObjectClass *) klass;
 338   POA_Accessibility_Application__epv *epv = &klass->epv;
 339
 340   spi_application_parent_class = g_type_class_ref (SPI_ACCESSIBLE_TYPE);
 341
 342   object_class->finalize = spi_accessible_application_finalize;
 343
 344   epv->_get_toolkitName = impl_accessibility_application_get_toolkit_name;
 345   epv->_get_version = impl_accessibility_application_get_version;
 346   epv->_get_id = impl_accessibility_application_get_id;
 347   epv->_set_id = impl_accessibility_application_set_id;
 348   epv->registerToolkitEventListener = impl_accessibility_application_register_toolkit_event_listener;
 349   init_toolkit_names (&klass->generic_event_names, &klass->toolkit_event_names);
 350 }
 351
 352 static void
 353 spi_application_init (SpiApplication *application)
 354 {
 355   application->toolkit_listeners = NULL;
 356   the_app = application;
 357 }
 358
 359 BONOBO_TYPE_FUNC_FULL (SpiApplication,
 360                        Accessibility_Application,
 361                        PARENT_TYPE, spi_application);
 362
 363 SpiApplication *
 364 spi_application_new (AtkObject *app_root)
 365 {
 366   return SPI_APPLICATION (spi_accessible_construct (
 367         SPI_APPLICATION_TYPE, app_root));
 368 }