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, 2002 Sun Microsystems Inc.,
   6  * Copyright 2001, 2002 Ximian, Inc., 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 /* desktop.c: implements SpiDesktop.idl */
  25
  26 #include <config.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <atk/atkcomponent.h>
  30 #include <gdk/gdkscreen.h>
  31 #include <gdk/gdkx.h>
  32
  33 #include <spi-common/spi-dbus.h>
  34
  35 #include "desktop.h"
  36 #include "registry.h"
  37
  38 G_DEFINE_TYPE(SpiDesktop, spi_desktop, G_TYPE_OBJECT)
  39
  40 /* SpiDesktop signals */
  41 enum {
  42   APPLICATION_ADDED,
  43   APPLICATION_REMOVED,
  44 LAST_SIGNAL
  45 };
  46 static guint spi_desktop_signals[LAST_SIGNAL];
  47
  48
  49 /* Our parent Gtk object type */
  50 #define PARENT_TYPE SPI_ACCESSIBLE_TYPE
  51
  52 typedef struct {
  53         SpiDesktop *desktop;
  54         const char *path;
  55 } Application;
  56
  57 static gboolean exiting = FALSE;
  58
  59 /* A pointer to our parent object class */
  60 static GObjectClass *parent_class;
  61
  62 #define SPI_TYPE_ATK_DESKTOP            (spi_atk_desktop_get_type ())
  63 #define SPI_ATK_DESKTOP(o)              (G_TYPE_CHECK_INSTANCE_CAST ((o), SPI_TYPE_ATK_DESKTOP, SpiAtkDesktop))
  64 #define SPI_IS_ATK_DESKTOP(o)           (G_TYPE_CHECK_INSTANCE_TYPE ((o), SPI_TYPE_ATK_DESKTOP))
  65
  66 typedef struct {
  67         AtkObject parent;
  68
  69         GdkScreen *screen;
  70 } SpiAtkDesktop;
  71
  72 typedef struct {
  73         AtkObjectClass parent;
  74 } SpiAtkDesktopClass;
  75
  76 static void spi_atk_desktop_init (SpiAtkDesktop *desktop);
  77 static void atk_component_interface_init (AtkComponentIface *iface);
  78 static void spi_atk_desktop_get_extents  (AtkComponent    *component,
  79                                           gint            *x,
  80                                           gint            *y,
  81                                           gint            *width,
  82                                           gint            *height,
  83                                           AtkCoordType    coord_type);
  84
  85 static GType
  86 spi_atk_desktop_get_type (void)
  87 {
  88   static GType type = 0;
  89
  90   if (!type)
  91     {
  92       static const GTypeInfo typeInfo =
  93       {
  94         sizeof (SpiAtkDesktopClass),
  95         (GBaseInitFunc) NULL,
  96         (GBaseFinalizeFunc) NULL,
  97         (GClassInitFunc) NULL,
  98         (GClassFinalizeFunc) NULL,
  99         NULL,
 100         sizeof (SpiAtkDesktop),
 101         0,
 102         (GInstanceInitFunc) spi_atk_desktop_init,
 103       } ;
 104       static const GInterfaceInfo atk_component_info =
 105         {
 106         (GInterfaceInitFunc) atk_component_interface_init,
 107         (GInterfaceFinalizeFunc) NULL,
 108         NULL
 109       };
 110
 111       type = g_type_register_static (ATK_TYPE_OBJECT,
 112                                      "SpiAtkDesktop", &typeInfo, 0);
 113       g_type_add_interface_static (type, ATK_TYPE_COMPONENT,
 114                                    &atk_component_info);
 115     }
 116   return type;
 117 }
 118
 119 static void
 120 spi_atk_desktop_init (SpiAtkDesktop *desktop)
 121 {
 122   GdkDisplay *display;
 123
 124   atk_object_set_name (ATK_OBJECT (desktop), "main");
 125   display = gdk_x11_lookup_xdisplay (GDK_DISPLAY ());
 126   desktop->screen = gdk_display_get_default_screen (display);
 127 }
 128
 129 static void
 130 atk_component_interface_init (AtkComponentIface *iface)
 131 {
 132   g_return_if_fail (iface != NULL);
 133
 134   iface->get_extents = spi_atk_desktop_get_extents;
 135 }
 136
 137 static void
 138 spi_atk_desktop_get_extents (AtkComponent *component,
 139                              gint         *x,
 140                              gint         *y,
 141                              gint         *width,
 142                              gint         *height,
 143                              AtkCoordType coord_type)
 144 {
 145   SpiAtkDesktop *desktop;
 146
 147   g_return_if_fail (SPI_IS_ATK_DESKTOP (component));
 148   desktop = SPI_ATK_DESKTOP (component);
 149   *x = 0;
 150   *y = 0;
 151   *width = gdk_screen_get_width (desktop->screen);
 152   *height = gdk_screen_get_height (desktop->screen);
 153 }
 154
 155 static void
 156 spi_desktop_init (SpiDesktop *desktop)
 157 {
 158   desktop->applications = NULL;
 159 }
 160
 161 static void
 162 spi_desktop_dispose (GObject *object)
 163 {
 164   SpiDesktop *desktop = (SpiDesktop *) object;
 165
 166   while (desktop->applications)
 167     {
 168       Application *app = desktop->applications->data;
 169       g_assert (app != NULL);
 170       spi_desktop_remove_application (desktop, app->path);
 171     }
 172
 173   G_OBJECT_CLASS (parent_class)->dispose (object);
 174 }
 175
 176 static dbus_bool_t
 177 impl_desktop_get_child_count (const char *path, DBusMessageIter * iter,
 178                      void *user_data)
 179 {
 180   SpiDesktop *desktop = SPI_REGISTRY(user_data)->desktop;
 181
 182   if (desktop->applications)
 183     {
 184       return droute_return_v_int32(iter, g_list_length (desktop->applications));
 185     }
 186   else
 187     {
 188       return droute_return_v_int32(iter, 0);
 189     }
 190 }
 191
 192 static DBusMessage *
 193 impl_desktop_get_child_at_index (DBusConnection *bus, DBusMessage *message, void *user_data)
 194 {
 195   SpiDesktop *desktop = SPI_REGISTRY(user_data)->desktop;
 196   DBusError error;
 197   dbus_int32_t index;
 198   Application *app;
 199   const char *path;
 200   DBusMessage *reply;
 201
 202   dbus_error_init (&error);
 203   if (!dbus_message_get_args (message, &error, DBUS_TYPE_INT32, &index, DBUS_TYPE_INVALID))
 204   {
 205     return spi_dbus_general_error (message);
 206   }
 207   app = g_list_nth_data (desktop->applications, index);
 208   path = (app? app->path: SPI_DBUS_PATH_NULL);
 209
 210   reply = dbus_message_new_method_return (message);
 211   if (reply)
 212     {
 213       dbus_message_append_args (reply, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID);
 214     }
 215
 216   return reply;
 217 }
 218
 219 static void
 220 spi_desktop_exiting (void)
 221 {
 222   exiting = TRUE;
 223 }
 224
 225 static void
 226 spi_desktop_class_init (SpiDesktopClass *klass)
 227 {
 228   GObjectClass * object_class = (GObjectClass *) klass;
 229
 230   object_class->dispose = spi_desktop_dispose;
 231
 232   parent_class = g_type_class_ref (G_TYPE_OBJECT);
 233
 234   spi_desktop_signals[APPLICATION_ADDED] =
 235     g_signal_new ("application_added",
 236                   G_TYPE_FROM_CLASS (klass),
 237                   G_SIGNAL_RUN_LAST,
 238                   G_STRUCT_OFFSET (SpiDesktopClass, application_added),
 239                   NULL, NULL,
 240                   g_cclosure_marshal_VOID__UINT,
 241                   G_TYPE_NONE,
 242                   1, G_TYPE_UINT);
 243   spi_desktop_signals[APPLICATION_REMOVED] =
 244     g_signal_new ("application_removed",
 245                   G_TYPE_FROM_CLASS (klass),
 246                   G_SIGNAL_RUN_LAST,
 247                   G_STRUCT_OFFSET (SpiDesktopClass, application_removed),
 248                   NULL, NULL,
 249                   g_cclosure_marshal_VOID__UINT,
 250                   G_TYPE_NONE,
 251                   1, G_TYPE_UINT);
 252   g_atexit (spi_desktop_exiting);
 253 }
 254
 255 SpiDesktop *
 256 spi_desktop_new (void)
 257 {
 258   return g_object_new (SPI_DESKTOP_TYPE, NULL);
 259 }
 260
 261 static void
 262 abnormal_application_termination (gpointer object, Application *app)
 263 {
 264   g_return_if_fail (SPI_IS_DESKTOP (app->desktop));
 265
 266   if (!exiting)
 267     spi_desktop_remove_application (app->desktop, app->path);
 268 }
 269
 270 void
 271 spi_desktop_add_application (SpiDesktop *desktop,
 272                              const char *application)
 273 {
 274   Application       *app;
 275
 276   g_return_if_fail (SPI_IS_DESKTOP (desktop));
 277
 278   spi_desktop_remove_application (desktop, application);
 279
 280   app = g_new (Application, 1);
 281   app->desktop = desktop;
 282   app->path = application;
 283
 284       desktop->applications = g_list_append (desktop->applications, app);
 285
 286   // TODO: Listen for termination, and call abnormal_application_termination
 287
 288   g_signal_emit (G_OBJECT (desktop),
 289                  spi_desktop_signals[APPLICATION_ADDED], 0,
 290                  g_list_index (desktop->applications, app));
 291 }
 292
 293 void
 294 spi_desktop_remove_application (SpiDesktop *desktop,
 295                                 const char *path)
 296 {
 297   guint idx;
 298   GList *l;
 299
 300   g_return_if_fail (path != NULL);
 301   g_return_if_fail (SPI_IS_DESKTOP (desktop));
 302
 303   idx = 0;
 304   for (l = desktop->applications; l; l = l->next)
 305     {
 306       Application *app = (Application *) l->data;
 307
 308       if (!strcmp(app->path, path))
 309         {
 310           break;
 311         }
 312       idx++;
 313     }
 314
 315   if (l)
 316     {
 317       Application *app = (Application *) l->data;
 318
 319       desktop->applications = g_list_delete_link (desktop->applications, l);
 320
 321       // TODO: unlisten for broken app, if appropriate
 322       g_free (app);
 323
 324       g_signal_emit (G_OBJECT (desktop), spi_desktop_signals[APPLICATION_REMOVED], 0, idx);
 325     }
 326 }
 327
 328 static DRouteMethod methods[] =
 329 {
 330   { impl_desktop_get_child_at_index, "getChildAtIndex" },
 331   { NULL, NULL }
 332 };
 333
 334 static DRouteProperty properties[] =
 335 {
 336   { impl_desktop_get_child_count, NULL, "getChildCount" },
 337   { NULL, NULL, NULL }
 338 };
 339
 340 void
 341 spi_registry_initialize_desktop_interface (DRouteData * data)
 342 {
 343   droute_add_interface (data, "org.freedesktop.atspi.Desktop", methods,
 344                         properties, NULL, NULL);
 345 };