registryd/desktop.c

   1 /*
   2  * AT-SPI - Assistive Technology Service Provider Interface
   3  * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
   4  *
   5  * Copyright 2001 Sun Microsystems Inc., Ximian Inc.
   6  *
   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.
  11  *
  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.
  16  *
  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.
  21  */
  22
  23 /* desktop.c: implements SpiDesktop.idl */
  24
  25 #include <config.h>
  26 #include <stdio.h>
  27 #include <libbonobo.h>
  28 #include "desktop.h"
  29
  30 /* SpiDesktop signals */
  31 enum {
  32   APPLICATION_ADDED,
  33   APPLICATION_REMOVED,
  34 LAST_SIGNAL
  35 };
  36 static guint spi_desktop_signals[LAST_SIGNAL];
  37
  38
  39 /* Our parent Gtk object type */
  40 #define PARENT_TYPE SPI_ACCESSIBLE_TYPE
  41
  42 typedef struct {
  43         SpiDesktop *desktop;
  44         Accessibility_Application ref;
  45 } Application;
  46
  47 /* A pointer to our parent object class */
  48 static SpiAccessibleClass *parent_class;
  49
  50 static void
  51 spi_desktop_init (SpiDesktop *desktop)
  52 {
  53   spi_base_construct (SPI_BASE (desktop), g_object_new (ATK_TYPE_OBJECT, NULL));
  54
  55   desktop->applications = NULL;
  56
  57   atk_object_set_name (ATK_OBJECT (SPI_BASE (desktop)->gobj), "main");
  58 }
  59
  60 static void
  61 spi_desktop_dispose (GObject *object)
  62 {
  63   SpiDesktop *desktop = (SpiDesktop *) object;
  64
  65   while (desktop->applications)
  66     {
  67       Application *app = (Application *) desktop->applications;
  68       spi_desktop_remove_application (desktop, app->ref);
  69     }
  70
  71   G_OBJECT_CLASS (parent_class)->dispose (object);
  72 }
  73
  74 static CORBA_long
  75 impl_desktop_get_child_count (PortableServer_Servant servant,
  76                               CORBA_Environment     *ev)
  77 {
  78   SpiDesktop *desktop = SPI_DESKTOP (bonobo_object_from_servant (servant));
  79
  80   if (desktop->applications)
  81     {
  82       return g_list_length (desktop->applications);
  83     }
  84   else
  85     {
  86       return 0;
  87     }
  88 }
  89
  90 static Accessibility_Accessible
  91 impl_desktop_get_child_at_index (PortableServer_Servant servant,
  92                                  const CORBA_long       index,
  93                                  CORBA_Environment     *ev)
  94 {
  95   SpiDesktop  *desktop = SPI_DESKTOP (bonobo_object_from_servant (servant));
  96   CORBA_Object retval;
  97   Application *app;
  98
  99   app = g_list_nth_data (desktop->applications, index);
 100
 101   if (app)
 102     {
 103       retval = bonobo_object_dup_ref (app->ref, ev);
 104       if (BONOBO_EX (ev))
 105         {
 106           retval = CORBA_OBJECT_NIL;
 107         }
 108     }
 109   else
 110     {
 111       retval = CORBA_OBJECT_NIL;
 112     }
 113
 114   return (Accessibility_Accessible) retval;
 115 }
 116
 117 static void
 118 spi_desktop_class_init (SpiDesktopClass *klass)
 119 {
 120   GObjectClass * object_class = (GObjectClass *) klass;
 121   SpiAccessibleClass * spi_accessible_class = (SpiAccessibleClass *) klass;
 122   POA_Accessibility_Accessible__epv *epv = &spi_accessible_class->epv;
 123
 124   object_class->dispose = spi_desktop_dispose;
 125
 126   parent_class = g_type_class_ref (SPI_ACCESSIBLE_TYPE);
 127
 128   spi_desktop_signals[APPLICATION_ADDED] =
 129     g_signal_new ("application_added",
 130                   G_TYPE_FROM_CLASS (klass),
 131                   G_SIGNAL_RUN_LAST,
 132                   G_STRUCT_OFFSET (SpiDesktopClass, application_added),
 133                   NULL, NULL,
 134                   g_cclosure_marshal_VOID__UINT,
 135                   G_TYPE_NONE,
 136                   1, G_TYPE_UINT);
 137   spi_desktop_signals[APPLICATION_REMOVED] =
 138     g_signal_new ("application_removed",
 139                   G_TYPE_FROM_CLASS (klass),
 140                   G_SIGNAL_RUN_LAST,
 141                   G_STRUCT_OFFSET (SpiDesktopClass, application_removed),
 142                   NULL, NULL,
 143                   g_cclosure_marshal_VOID__UINT,
 144                   G_TYPE_NONE,
 145                   1, G_TYPE_UINT);
 146   epv->_get_childCount = impl_desktop_get_child_count;
 147   epv->getChildAtIndex = impl_desktop_get_child_at_index;
 148 }
 149
 150 BONOBO_TYPE_FUNC_FULL (SpiDesktop,
 151                        Accessibility_Desktop,
 152                        PARENT_TYPE,
 153                        spi_desktop);
 154
 155 SpiDesktop *
 156 spi_desktop_new (void)
 157 {
 158   SpiDesktop *retval = g_object_new (SPI_DESKTOP_TYPE, NULL);
 159
 160   return retval;
 161 }
 162
 163 static void
 164 abnormal_application_termination (gpointer object, Application *app)
 165 {
 166   g_return_if_fail (SPI_IS_DESKTOP (app->desktop));
 167
 168   spi_desktop_remove_application (app->desktop, app->ref);
 169 }
 170
 171 void
 172 spi_desktop_add_application (SpiDesktop *desktop,
 173                              const Accessibility_Application application)
 174 {
 175   CORBA_Environment ev;
 176   Application       *app;
 177   Accessibility_Application ref;
 178
 179   g_return_if_fail (SPI_IS_DESKTOP (desktop));
 180
 181   spi_desktop_remove_application (desktop, application);
 182
 183   CORBA_exception_init (&ev);
 184
 185   ref = bonobo_object_dup_ref (application, &ev);
 186
 187   if (!BONOBO_EX (&ev))
 188     {
 189       app = g_new (Application, 1);
 190       app->desktop = desktop;
 191       app->ref = ref;
 192
 193       desktop->applications = g_list_append (desktop->applications, app);
 194       g_signal_emit (G_OBJECT (desktop), spi_desktop_signals[APPLICATION_ADDED], 0,
 195                      g_list_index (desktop->applications, app));
 196
 197       ORBit_small_listen_for_broken (app->ref, G_CALLBACK (abnormal_application_termination), app);
 198     }
 199
 200   CORBA_exception_free (&ev);
 201 }
 202
 203 void
 204 spi_desktop_remove_application (SpiDesktop *desktop,
 205                                 const Accessibility_Application app_ref)
 206 {
 207   GList *l;
 208   CORBA_Environment ev;
 209
 210   g_return_if_fail (SPI_IS_DESKTOP (desktop));
 211
 212   CORBA_exception_init (&ev);
 213
 214   for (l = desktop->applications; l; l = l->next)
 215     {
 216       Application *app = (Application *) l->data;
 217
 218       if (CORBA_Object_is_equivalent (app->ref, app_ref, &ev))
 219         {
 220           break;
 221         }
 222     }
 223
 224   CORBA_exception_free (&ev);
 225
 226   if (l)
 227     {
 228       Application *app = (Application *) l->data;
 229
 230       g_signal_emit (G_OBJECT (desktop), spi_desktop_signals[APPLICATION_REMOVED], 0,
 231                      g_list_index (desktop->applications, l));
 232       desktop->applications = g_list_delete_link (desktop->applications, l);
 233
 234       ORBit_small_unlisten_for_broken (app->ref, G_CALLBACK (abnormal_application_termination));
 235       bonobo_object_release_unref (app->ref, NULL);
 236       g_free (app);
 237     }
 238 }