1 /* GAIL - The GNOME Accessibility Implementation Library
2 * Copyright 2001, 2002, 2003 Sun Microsystems Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
25 #include "gtktoplevelaccessible.h"
26 #include "gtkwindowaccessible.h"
29 static GHashTable *listener_list = NULL;
30 static gint listener_idx = 1;
31 static GSList *key_listener_list = NULL;
32 static guint key_snooper_id = 0;
34 typedef struct _GailUtilListenerInfo GailUtilListenerInfo;
35 typedef struct _GailKeyEventInfo GailKeyEventInfo;
37 struct _GailUtilListenerInfo
44 struct _GailKeyEventInfo
46 AtkKeyEventStruct *key_event;
51 add_listener (GSignalEmissionHook listener,
52 const gchar *object_type,
53 const gchar *signal_name,
54 const gchar *hook_data)
60 type = g_type_from_name (object_type);
63 signal_id = g_signal_lookup (signal_name, type);
66 GailUtilListenerInfo *listener_info;
70 listener_info = g_new (GailUtilListenerInfo, 1);
71 listener_info->key = listener_idx;
72 listener_info->hook_id =
73 g_signal_add_emission_hook (signal_id, 0, listener,
75 (GDestroyNotify) g_free);
76 listener_info->signal_id = signal_id;
78 g_hash_table_insert (listener_list, &(listener_info->key), listener_info);
83 g_warning("Invalid signal type %s\n", signal_name);
88 g_warning("Invalid object type %s\n", object_type);
94 state_event_watcher (GSignalInvocationHint *hint,
96 const GValue *param_values,
103 GdkEventWindowState *event;
106 object = g_value_get_object (param_values + 0);
107 if (!GTK_IS_WINDOW (object))
110 event = g_value_get_boxed (param_values + 1);
111 if (event->type == GDK_WINDOW_STATE)
113 widget = GTK_WIDGET (object);
115 if (event->new_window_state & GDK_WINDOW_STATE_MAXIMIZED)
116 signal_name = "maximize";
117 else if (event->new_window_state & GDK_WINDOW_STATE_ICONIFIED)
118 signal_name = "minimize";
119 else if (event->new_window_state == 0)
120 signal_name = "restore";
124 atk_obj = gtk_widget_get_accessible (widget);
125 if (GTK_IS_WINDOW_ACCESSIBLE (atk_obj))
127 parent = atk_object_get_parent (atk_obj);
128 if (parent == atk_get_root ())
129 g_signal_emit_by_name (atk_obj, signal_name);
138 configure_event_watcher (GSignalInvocationHint *hint,
139 guint n_param_values,
140 const GValue *param_values,
143 GtkAllocation allocation;
151 object = g_value_get_object (param_values + 0);
152 if (!GTK_IS_WINDOW (object))
155 event = g_value_get_boxed (param_values + 1);
156 if (event->type != GDK_CONFIGURE)
158 widget = GTK_WIDGET (object);
159 gtk_widget_get_allocation (widget, &allocation);
160 if (allocation.x == ((GdkEventConfigure *)event)->x &&
161 allocation.y == ((GdkEventConfigure *)event)->y &&
162 allocation.width == ((GdkEventConfigure *)event)->width &&
163 allocation.height == ((GdkEventConfigure *)event)->height)
166 if (allocation.width != ((GdkEventConfigure *)event)->width ||
167 allocation.height != ((GdkEventConfigure *)event)->height)
168 signal_name = "resize";
170 signal_name = "move";
172 atk_obj = gtk_widget_get_accessible (widget);
173 if (GTK_IS_WINDOW_ACCESSIBLE (atk_obj))
175 parent = atk_object_get_parent (atk_obj);
176 if (parent == atk_get_root ())
177 g_signal_emit_by_name (atk_obj, signal_name);
186 window_focus (GtkWidget *widget,
187 GdkEventFocus *event)
191 g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
193 atk_obj = gtk_widget_get_accessible (widget);
194 g_signal_emit_by_name (atk_obj, event->in ? "activate" : "deactivate");
200 window_added (AtkObject *atk_obj,
206 if (!GTK_IS_WINDOW_ACCESSIBLE (child))
209 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
213 g_signal_connect (widget, "focus-in-event", (GCallback) window_focus, NULL);
214 g_signal_connect (widget, "focus-out-event", (GCallback) window_focus, NULL);
215 g_signal_emit_by_name (child, "create");
220 window_removed (AtkObject *atk_obj,
227 if (!GTK_IS_WINDOW_ACCESSIBLE (child))
230 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
234 window = GTK_WINDOW (widget);
236 * Deactivate window if it is still focused and we are removing it. This
237 * can happen when a dialog displayed by gok is removed.
239 if (gtk_window_is_active (window) &&
240 gtk_window_has_toplevel_focus (window))
241 g_signal_emit_by_name (child, "deactivate");
243 g_signal_handlers_disconnect_by_func (widget, (gpointer) window_focus, NULL);
244 g_signal_emit_by_name (child, "destroy");
248 do_window_event_initialization (void)
252 g_type_class_ref (GTK_TYPE_WINDOW_ACCESSIBLE);
253 g_signal_add_emission_hook (g_signal_lookup ("window-state-event", GTK_TYPE_WIDGET),
254 0, state_event_watcher, NULL, (GDestroyNotify) NULL);
255 g_signal_add_emission_hook (g_signal_lookup ("configure-event", GTK_TYPE_WIDGET),
256 0, configure_event_watcher, NULL, (GDestroyNotify) NULL);
258 root = atk_get_root ();
259 g_signal_connect (root, "children-changed::add",
260 (GCallback) window_added, NULL);
261 g_signal_connect (root, "children-changed::remove",
262 (GCallback) window_removed, NULL);
265 gail_util_add_global_event_listener (GSignalEmissionHook listener,
266 const gchar *event_type)
269 gchar **split_string;
271 split_string = g_strsplit (event_type, ":", 3);
275 if (!g_strcmp0 ("window", split_string[0]))
277 static gboolean initialized = FALSE;
281 do_window_event_initialization ();
284 rc = add_listener (listener, "GtkWindowAccessible", split_string[1], event_type);
288 rc = add_listener (listener, split_string[1], split_string[2], event_type);
291 g_strfreev (split_string);
298 gail_util_remove_global_event_listener (guint remove_listener)
300 if (remove_listener > 0)
302 GailUtilListenerInfo *listener_info;
303 gint tmp_idx = remove_listener;
305 listener_info = (GailUtilListenerInfo *)
306 g_hash_table_lookup(listener_list, &tmp_idx);
308 if (listener_info != NULL)
310 /* Hook id of 0 and signal id of 0 are invalid */
311 if (listener_info->hook_id != 0 && listener_info->signal_id != 0)
313 /* Remove the emission hook */
314 g_signal_remove_emission_hook(listener_info->signal_id,
315 listener_info->hook_id);
317 /* Remove the element from the hash */
318 g_hash_table_remove(listener_list, &tmp_idx);
322 g_warning("Invalid listener hook_id %ld or signal_id %d\n",
323 listener_info->hook_id, listener_info->signal_id);
328 g_warning("No listener with the specified listener id %d",
334 g_warning("Invalid listener_id %d", remove_listener);
338 static AtkKeyEventStruct *
339 atk_key_event_from_gdk_event_key (GdkEventKey *key)
341 AtkKeyEventStruct *event = g_new0 (AtkKeyEventStruct, 1);
345 event->type = ATK_KEY_EVENT_PRESS;
347 case GDK_KEY_RELEASE:
348 event->type = ATK_KEY_EVENT_RELEASE;
351 g_assert_not_reached ();
354 event->state = key->state;
355 event->keyval = key->keyval;
356 event->length = key->length;
357 if (key->string && key->string [0] &&
358 (key->state & GDK_CONTROL_MASK ||
359 g_unichar_isgraph (g_utf8_get_char (key->string))))
361 event->string = key->string;
363 else if (key->type == GDK_KEY_PRESS ||
364 key->type == GDK_KEY_RELEASE)
366 event->string = gdk_keyval_name (key->keyval);
368 event->keycode = key->hardware_keycode;
369 event->timestamp = key->time;
371 g_print ("GailKey:\tsym %u\n\tmods %x\n\tcode %u\n\ttime %lx\n",
372 (unsigned int) event->keyval,
373 (unsigned int) event->state,
374 (unsigned int) event->keycode,
375 (unsigned long int) event->timestamp);
381 AtkKeySnoopFunc func;
387 gail_key_snooper (GtkWidget *the_widget,
392 AtkKeyEventStruct *atk_event;
395 atk_event = atk_key_event_from_gdk_event_key (event);
399 for (l = key_listener_list; l; l = l->next)
401 KeyEventListener *listener = l->data;
403 result |= listener->func (atk_event, listener->data);
411 gail_util_add_key_event_listener (AtkKeySnoopFunc listener_func,
412 gpointer listener_data)
414 static guint key = 0;
415 KeyEventListener *listener;
417 if (key_snooper_id == 0)
418 key_snooper_id = gtk_key_snooper_install (gail_key_snooper, NULL);
422 listener = g_slice_new0 (KeyEventListener);
423 listener->func = listener_func;
424 listener->data = listener_data;
427 key_listener_list = g_slist_append (key_listener_list, listener);
433 gail_util_remove_key_event_listener (guint listener_key)
437 for (l = key_listener_list; l; l = l->next)
439 KeyEventListener *listener = l->data;
441 if (listener->key == listener_key)
443 g_slice_free (KeyEventListener, listener);
444 key_listener_list = g_slist_delete_link (key_listener_list, l);
450 if (key_listener_list == NULL)
452 gtk_key_snooper_remove (key_snooper_id);
458 gail_util_get_root (void)
460 static AtkObject *root = NULL;
464 root = g_object_new (GTK_TYPE_TOPLEVEL_ACCESSIBLE, NULL);
465 atk_object_initialize (root, NULL);
472 gail_util_get_toolkit_name (void)
478 gail_util_get_toolkit_version (void)
484 _gail_util_install (void)
486 AtkUtilClass *atk_class = ATK_UTIL_CLASS (g_type_class_ref (ATK_TYPE_UTIL));
488 atk_class->add_global_event_listener = gail_util_add_global_event_listener;
489 atk_class->remove_global_event_listener = gail_util_remove_global_event_listener;
490 atk_class->add_key_event_listener = gail_util_add_key_event_listener;
491 atk_class->remove_key_event_listener = gail_util_remove_key_event_listener;
492 atk_class->get_root = gail_util_get_root;
493 atk_class->get_toolkit_name = gail_util_get_toolkit_name;
494 atk_class->get_toolkit_version = gail_util_get_toolkit_version;
496 listener_list = g_hash_table_new_full (g_int_hash, g_int_equal, NULL, g_free);