1 /* GAIL - The GNOME Accessibility Implementation Library
2 * Copyright 2011, F123 Consulting & Mais Diferenças
3 * Copyright 2001, 2002, 2003 Sun Microsystems Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
24 #include "gtktoplevelaccessible.h"
25 #include "gtkwindowaccessible.h"
28 static GHashTable *listener_list = NULL;
29 static gint listener_idx = 1;
30 static GSList *key_listener_list = NULL;
32 typedef struct _GailUtilListenerInfo GailUtilListenerInfo;
33 typedef struct _GailKeyEventInfo GailKeyEventInfo;
35 struct _GailUtilListenerInfo
42 struct _GailKeyEventInfo
44 AtkKeyEventStruct *key_event;
49 add_listener (GSignalEmissionHook listener,
50 const gchar *object_type,
51 const gchar *signal_name,
52 const gchar *hook_data)
58 type = g_type_from_name (object_type);
61 signal_id = g_signal_lookup (signal_name, type);
64 GailUtilListenerInfo *listener_info;
68 listener_info = g_new (GailUtilListenerInfo, 1);
69 listener_info->key = listener_idx;
70 listener_info->hook_id =
71 g_signal_add_emission_hook (signal_id, 0, listener,
73 (GDestroyNotify) g_free);
74 listener_info->signal_id = signal_id;
76 g_hash_table_insert (listener_list, &(listener_info->key), listener_info);
81 g_warning ("Invalid signal type %s\n", signal_name);
86 g_warning ("Invalid object type %s\n", object_type);
92 state_event_watcher (GSignalInvocationHint *hint,
94 const GValue *param_values,
101 GdkEventWindowState *event;
104 object = g_value_get_object (param_values + 0);
105 if (!GTK_IS_WINDOW (object))
108 event = g_value_get_boxed (param_values + 1);
109 if (event->type == GDK_WINDOW_STATE)
111 widget = GTK_WIDGET (object);
113 if (event->new_window_state & GDK_WINDOW_STATE_MAXIMIZED)
114 signal_name = "maximize";
115 else if (event->new_window_state & GDK_WINDOW_STATE_ICONIFIED)
116 signal_name = "minimize";
117 else if (event->new_window_state == 0)
118 signal_name = "restore";
122 atk_obj = gtk_widget_get_accessible (widget);
123 if (GTK_IS_WINDOW_ACCESSIBLE (atk_obj))
125 parent = atk_object_get_parent (atk_obj);
126 if (parent == atk_get_root ())
127 g_signal_emit_by_name (atk_obj, signal_name);
136 configure_event_watcher (GSignalInvocationHint *hint,
137 guint n_param_values,
138 const GValue *param_values,
141 GtkAllocation allocation;
149 object = g_value_get_object (param_values + 0);
150 if (!GTK_IS_WINDOW (object))
153 event = g_value_get_boxed (param_values + 1);
154 if (event->type != GDK_CONFIGURE)
156 widget = GTK_WIDGET (object);
157 gtk_widget_get_allocation (widget, &allocation);
158 if (allocation.x == ((GdkEventConfigure *)event)->x &&
159 allocation.y == ((GdkEventConfigure *)event)->y &&
160 allocation.width == ((GdkEventConfigure *)event)->width &&
161 allocation.height == ((GdkEventConfigure *)event)->height)
164 if (allocation.width != ((GdkEventConfigure *)event)->width ||
165 allocation.height != ((GdkEventConfigure *)event)->height)
166 signal_name = "resize";
168 signal_name = "move";
170 atk_obj = gtk_widget_get_accessible (widget);
171 if (GTK_IS_WINDOW_ACCESSIBLE (atk_obj))
173 parent = atk_object_get_parent (atk_obj);
174 if (parent == atk_get_root ())
175 g_signal_emit_by_name (atk_obj, signal_name);
184 window_focus (GtkWidget *widget,
185 GdkEventFocus *event)
189 g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
191 atk_obj = gtk_widget_get_accessible (widget);
192 g_signal_emit_by_name (atk_obj, event->in ? "activate" : "deactivate");
198 window_added (AtkObject *atk_obj,
204 if (!GTK_IS_WINDOW_ACCESSIBLE (child))
207 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
211 g_signal_connect (widget, "focus-in-event", (GCallback) window_focus, NULL);
212 g_signal_connect (widget, "focus-out-event", (GCallback) window_focus, NULL);
213 g_signal_emit_by_name (child, "create");
218 window_removed (AtkObject *atk_obj,
225 if (!GTK_IS_WINDOW_ACCESSIBLE (child))
228 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
232 window = GTK_WINDOW (widget);
234 * Deactivate window if it is still focused and we are removing it. This
235 * can happen when a dialog displayed by gok is removed.
237 if (gtk_window_is_active (window) &&
238 gtk_window_has_toplevel_focus (window))
239 g_signal_emit_by_name (child, "deactivate");
241 g_signal_handlers_disconnect_by_func (widget, (gpointer) window_focus, NULL);
242 g_signal_emit_by_name (child, "destroy");
246 do_window_event_initialization (void)
250 g_type_class_ref (GTK_TYPE_WINDOW_ACCESSIBLE);
251 g_signal_add_emission_hook (g_signal_lookup ("window-state-event", GTK_TYPE_WIDGET),
252 0, state_event_watcher, NULL, (GDestroyNotify) NULL);
253 g_signal_add_emission_hook (g_signal_lookup ("configure-event", GTK_TYPE_WIDGET),
254 0, configure_event_watcher, NULL, (GDestroyNotify) NULL);
256 root = atk_get_root ();
257 g_signal_connect (root, "children-changed::add",
258 (GCallback) window_added, NULL);
259 g_signal_connect (root, "children-changed::remove",
260 (GCallback) window_removed, NULL);
263 gail_util_add_global_event_listener (GSignalEmissionHook listener,
264 const gchar *event_type)
267 gchar **split_string;
269 split_string = g_strsplit (event_type, ":", 3);
271 if (g_strv_length (split_string) == 3)
272 rc = add_listener (listener, split_string[1], split_string[2], event_type);
274 g_strfreev (split_string);
280 gail_util_remove_global_event_listener (guint remove_listener)
282 if (remove_listener > 0)
284 GailUtilListenerInfo *listener_info;
285 gint tmp_idx = remove_listener;
287 listener_info = (GailUtilListenerInfo *)
288 g_hash_table_lookup(listener_list, &tmp_idx);
290 if (listener_info != NULL)
292 /* Hook id of 0 and signal id of 0 are invalid */
293 if (listener_info->hook_id != 0 && listener_info->signal_id != 0)
295 /* Remove the emission hook */
296 g_signal_remove_emission_hook(listener_info->signal_id,
297 listener_info->hook_id);
299 /* Remove the element from the hash */
300 g_hash_table_remove(listener_list, &tmp_idx);
304 g_warning ("Invalid listener hook_id %ld or signal_id %d\n",
305 listener_info->hook_id, listener_info->signal_id);
310 g_warning ("No listener with the specified listener id %d",
316 g_warning ("Invalid listener_id %d", remove_listener);
320 static AtkKeyEventStruct *
321 atk_key_event_from_gdk_event_key (GdkEventKey *key)
323 AtkKeyEventStruct *event = g_new0 (AtkKeyEventStruct, 1);
327 event->type = ATK_KEY_EVENT_PRESS;
329 case GDK_KEY_RELEASE:
330 event->type = ATK_KEY_EVENT_RELEASE;
333 g_assert_not_reached ();
336 event->state = key->state;
337 event->keyval = key->keyval;
338 event->length = key->length;
339 if (key->string && key->string [0] &&
340 (key->state & GDK_CONTROL_MASK ||
341 g_unichar_isgraph (g_utf8_get_char (key->string))))
343 event->string = key->string;
345 else if (key->type == GDK_KEY_PRESS ||
346 key->type == GDK_KEY_RELEASE)
348 event->string = gdk_keyval_name (key->keyval);
350 event->keycode = key->hardware_keycode;
351 event->timestamp = key->time;
353 g_print ("GailKey:\tsym %u\n\tmods %x\n\tcode %u\n\ttime %lx\n",
354 (unsigned int) event->keyval,
355 (unsigned int) event->state,
356 (unsigned int) event->keycode,
357 (unsigned long int) event->timestamp);
363 AtkKeySnoopFunc func;
369 _gail_util_key_snooper (GtkWidget *the_widget,
373 AtkKeyEventStruct *atk_event;
376 atk_event = atk_key_event_from_gdk_event_key (event);
380 for (l = key_listener_list; l; l = l->next)
382 KeyEventListener *listener = l->data;
384 result |= listener->func (atk_event, listener->data);
392 gail_util_add_key_event_listener (AtkKeySnoopFunc listener_func,
393 gpointer listener_data)
395 static guint key = 0;
396 KeyEventListener *listener;
400 listener = g_slice_new0 (KeyEventListener);
401 listener->func = listener_func;
402 listener->data = listener_data;
405 key_listener_list = g_slist_append (key_listener_list, listener);
411 gail_util_remove_key_event_listener (guint listener_key)
415 for (l = key_listener_list; l; l = l->next)
417 KeyEventListener *listener = l->data;
419 if (listener->key == listener_key)
421 g_slice_free (KeyEventListener, listener);
422 key_listener_list = g_slist_delete_link (key_listener_list, l);
430 gail_util_get_root (void)
432 static AtkObject *root = NULL;
436 root = g_object_new (GTK_TYPE_TOPLEVEL_ACCESSIBLE, NULL);
437 atk_object_initialize (root, NULL);
444 gail_util_get_toolkit_name (void)
450 gail_util_get_toolkit_version (void)
456 _gail_util_install (void)
458 AtkUtilClass *atk_class = ATK_UTIL_CLASS (g_type_class_ref (ATK_TYPE_UTIL));
460 atk_class->add_global_event_listener = gail_util_add_global_event_listener;
461 atk_class->remove_global_event_listener = gail_util_remove_global_event_listener;
462 atk_class->add_key_event_listener = gail_util_add_key_event_listener;
463 atk_class->remove_key_event_listener = gail_util_remove_key_event_listener;
464 atk_class->get_root = gail_util_get_root;
465 atk_class->get_toolkit_name = gail_util_get_toolkit_name;
466 atk_class->get_toolkit_version = gail_util_get_toolkit_version;
468 listener_list = g_hash_table_new_full (g_int_hash, g_int_equal, NULL, g_free);
469 do_window_event_initialization ();