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.
26 #include "gailtoplevel.h"
27 #include "gailwindow.h"
28 #include "gail-private-macros.h"
30 static void gail_util_class_init (GailUtilClass *klass);
31 static void gail_util_init (GailUtil *utils);
34 static guint gail_util_add_global_event_listener (GSignalEmissionHook listener,
35 const gchar* event_type);
36 static void gail_util_remove_global_event_listener (guint remove_listener);
37 static guint gail_util_add_key_event_listener (AtkKeySnoopFunc listener,
39 static void gail_util_remove_key_event_listener (guint remove_listener);
40 static AtkObject* gail_util_get_root (void);
41 static G_CONST_RETURN gchar *gail_util_get_toolkit_name (void);
42 static G_CONST_RETURN gchar *gail_util_get_toolkit_version (void);
44 /* gailmisc/AtkMisc */
45 static void gail_misc_class_init (GailMiscClass *klass);
46 static void gail_misc_init (GailMisc *misc);
48 static void gail_misc_threads_enter (AtkMisc *misc);
49 static void gail_misc_threads_leave (AtkMisc *misc);
53 static void _listener_info_destroy (gpointer data);
54 static guint add_listener (GSignalEmissionHook listener,
55 const gchar *object_type,
57 const gchar *hook_data);
58 static void do_window_event_initialization (void);
59 static gboolean state_event_watcher (GSignalInvocationHint *hint,
61 const GValue *param_values,
63 static void window_added (AtkObject *atk_obj,
66 static void window_removed (AtkObject *atk_obj,
69 static gboolean window_focus (GtkWidget *widget,
70 GdkEventFocus *event);
71 static gboolean configure_event_watcher (GSignalInvocationHint *hint,
73 const GValue *param_values,
77 static AtkObject* root = NULL;
78 static GHashTable *listener_list = NULL;
79 static gint listener_idx = 1;
80 static GSList *key_listener_list = NULL;
81 static guint key_snooper_id = 0;
83 typedef struct _GailUtilListenerInfo GailUtilListenerInfo;
84 typedef struct _GailKeyEventInfo GailKeyEventInfo;
86 struct _GailUtilListenerInfo
93 struct _GailKeyEventInfo
95 AtkKeyEventStruct *key_event;
99 G_DEFINE_TYPE (GailUtil, gail_util, ATK_TYPE_UTIL)
102 gail_util_class_init (GailUtilClass *klass)
104 AtkUtilClass *atk_class;
107 data = g_type_class_peek (ATK_TYPE_UTIL);
108 atk_class = ATK_UTIL_CLASS (data);
110 atk_class->add_global_event_listener =
111 gail_util_add_global_event_listener;
112 atk_class->remove_global_event_listener =
113 gail_util_remove_global_event_listener;
114 atk_class->add_key_event_listener =
115 gail_util_add_key_event_listener;
116 atk_class->remove_key_event_listener =
117 gail_util_remove_key_event_listener;
118 atk_class->get_root = gail_util_get_root;
119 atk_class->get_toolkit_name = gail_util_get_toolkit_name;
120 atk_class->get_toolkit_version = gail_util_get_toolkit_version;
122 listener_list = g_hash_table_new_full(g_int_hash, g_int_equal, NULL,
123 _listener_info_destroy);
127 gail_util_init (GailUtil *utils)
132 gail_util_add_global_event_listener (GSignalEmissionHook listener,
133 const gchar *event_type)
136 gchar **split_string;
138 split_string = g_strsplit (event_type, ":", 3);
142 if (!strcmp ("window", split_string[0]))
144 static gboolean initialized = FALSE;
148 do_window_event_initialization ();
151 rc = add_listener (listener, "GailWindow", split_string[1], event_type);
155 rc = add_listener (listener, split_string[1], split_string[2], event_type);
158 g_strfreev (split_string);
165 gail_util_remove_global_event_listener (guint remove_listener)
167 if (remove_listener > 0)
169 GailUtilListenerInfo *listener_info;
170 gint tmp_idx = remove_listener;
172 listener_info = (GailUtilListenerInfo *)
173 g_hash_table_lookup(listener_list, &tmp_idx);
175 if (listener_info != NULL)
177 /* Hook id of 0 and signal id of 0 are invalid */
178 if (listener_info->hook_id != 0 && listener_info->signal_id != 0)
180 /* Remove the emission hook */
181 g_signal_remove_emission_hook(listener_info->signal_id,
182 listener_info->hook_id);
184 /* Remove the element from the hash */
185 g_hash_table_remove(listener_list, &tmp_idx);
189 g_warning("Invalid listener hook_id %ld or signal_id %d\n",
190 listener_info->hook_id, listener_info->signal_id);
195 g_warning("No listener with the specified listener id %d",
201 g_warning("Invalid listener_id %d", remove_listener);
208 atk_key_event_from_gdk_event_key (GdkEventKey *key)
210 AtkKeyEventStruct *event = g_new0 (AtkKeyEventStruct, 1);
214 event->type = ATK_KEY_EVENT_PRESS;
216 case GDK_KEY_RELEASE:
217 event->type = ATK_KEY_EVENT_RELEASE;
220 g_assert_not_reached ();
223 event->state = key->state;
224 event->keyval = key->keyval;
225 event->length = key->length;
226 if (key->string && key->string [0] &&
227 (key->state & GDK_CONTROL_MASK ||
228 g_unichar_isgraph (g_utf8_get_char (key->string))))
230 event->string = key->string;
232 else if (key->type == GDK_KEY_PRESS ||
233 key->type == GDK_KEY_RELEASE)
235 event->string = gdk_keyval_name (key->keyval);
237 event->keycode = key->hardware_keycode;
238 event->timestamp = key->time;
240 g_print ("GailKey:\tsym %u\n\tmods %x\n\tcode %u\n\ttime %lx\n",
241 (unsigned int) event->keyval,
242 (unsigned int) event->state,
243 (unsigned int) event->keycode,
244 (unsigned long int) event->timestamp);
250 AtkKeySnoopFunc func;
256 gail_key_snooper (GtkWidget *the_widget, GdkEventKey *event, gpointer data)
259 AtkKeyEventStruct *atk_event;
262 atk_event = atk_key_event_from_gdk_event_key (event);
266 for (l = key_listener_list; l; l = l->next)
268 KeyEventListener *listener = l->data;
270 result |= listener->func (atk_event, listener->data);
278 gail_util_add_key_event_listener (AtkKeySnoopFunc listener_func,
279 gpointer listener_data)
281 static guint key = 0;
282 KeyEventListener *listener;
284 if (key_snooper_id == 0)
285 key_snooper_id = gtk_key_snooper_install (gail_key_snooper, NULL);
289 listener = g_slice_new0 (KeyEventListener);
290 listener->func = listener_func;
291 listener->data = listener_data;
294 key_listener_list = g_slist_append (key_listener_list, listener);
300 gail_util_remove_key_event_listener (guint listener_key)
304 for (l = key_listener_list; l; l = l->next)
306 KeyEventListener *listener = l->data;
308 if (listener->key == listener_key)
310 g_slice_free (KeyEventListener, listener);
311 key_listener_list = g_slist_delete_link (key_listener_list, l);
317 if (key_listener_list == NULL)
319 gtk_key_snooper_remove (key_snooper_id);
325 gail_util_get_root (void)
329 root = g_object_new (GAIL_TYPE_TOPLEVEL, NULL);
330 atk_object_initialize (root, NULL);
336 static G_CONST_RETURN gchar *
337 gail_util_get_toolkit_name (void)
342 static G_CONST_RETURN gchar *
343 gail_util_get_toolkit_version (void)
346 * Version is passed in as a -D flag when this file is
353 _listener_info_destroy (gpointer data)
359 add_listener (GSignalEmissionHook listener,
360 const gchar *object_type,
362 const gchar *hook_data)
368 type = g_type_from_name (object_type);
371 signal_id = g_signal_lookup (signal, type);
374 GailUtilListenerInfo *listener_info;
378 listener_info = g_malloc(sizeof(GailUtilListenerInfo));
379 listener_info->key = listener_idx;
380 listener_info->hook_id =
381 g_signal_add_emission_hook (signal_id, 0, listener,
382 g_strdup (hook_data),
383 (GDestroyNotify) g_free);
384 listener_info->signal_id = signal_id;
386 g_hash_table_insert(listener_list, &(listener_info->key), listener_info);
391 g_warning("Invalid signal type %s\n", signal);
396 g_warning("Invalid object type %s\n", object_type);
402 do_window_event_initialization (void)
407 * Ensure that GailWindowClass exists.
409 g_type_class_ref (GAIL_TYPE_WINDOW);
410 g_signal_add_emission_hook (g_signal_lookup ("window-state-event", GTK_TYPE_WIDGET),
411 0, state_event_watcher, NULL, (GDestroyNotify) NULL);
412 g_signal_add_emission_hook (g_signal_lookup ("configure-event", GTK_TYPE_WIDGET),
413 0, configure_event_watcher, NULL, (GDestroyNotify) NULL);
415 root = atk_get_root ();
416 g_signal_connect (root, "children-changed::add",
417 (GCallback) window_added, NULL);
418 g_signal_connect (root, "children-changed::remove",
419 (GCallback) window_removed, NULL);
423 state_event_watcher (GSignalInvocationHint *hint,
424 guint n_param_values,
425 const GValue *param_values,
432 GdkEventWindowState *event;
436 object = g_value_get_object (param_values + 0);
438 * The object can be a GtkMenu when it is popped up; we ignore this
440 if (!GTK_IS_WINDOW (object))
443 event = g_value_get_boxed (param_values + 1);
444 gail_return_val_if_fail (event->type == GDK_WINDOW_STATE, FALSE);
445 widget = GTK_WIDGET (object);
447 if (event->new_window_state & GDK_WINDOW_STATE_MAXIMIZED)
449 signal_name = "maximize";
451 else if (event->new_window_state & GDK_WINDOW_STATE_ICONIFIED)
453 signal_name = "minimize";
455 else if (event->new_window_state == 0)
457 signal_name = "restore";
462 atk_obj = gtk_widget_get_accessible (widget);
464 if (GAIL_IS_WINDOW (atk_obj))
466 parent = atk_object_get_parent (atk_obj);
467 if (parent == atk_get_root ())
469 signal_id = g_signal_lookup (signal_name, GAIL_TYPE_WINDOW);
470 g_signal_emit (atk_obj, signal_id, 0);
482 window_added (AtkObject *atk_obj,
488 if (!GAIL_IS_WINDOW (child)) return;
490 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
491 gail_return_if_fail (widget);
493 g_signal_connect (widget, "focus-in-event",
494 (GCallback) window_focus, NULL);
495 g_signal_connect (widget, "focus-out-event",
496 (GCallback) window_focus, NULL);
497 g_signal_emit (child, g_signal_lookup ("create", GAIL_TYPE_WINDOW), 0);
502 window_removed (AtkObject *atk_obj,
509 if (!GAIL_IS_WINDOW (child)) return;
511 widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
512 gail_return_if_fail (widget);
514 window = GTK_WINDOW (widget);
516 * Deactivate window if it is still focused and we are removing it. This
517 * can happen when a dialog displayed by gok is removed.
519 if (gtk_window_is_active (window) &&
520 gtk_window_has_toplevel_focus (window))
525 atk_obj = gtk_widget_get_accessible (widget);
526 signal_name = "deactivate";
527 g_signal_emit (atk_obj, g_signal_lookup (signal_name, GAIL_TYPE_WINDOW), 0);
530 g_signal_handlers_disconnect_by_func (widget, (gpointer) window_focus, NULL);
531 g_signal_emit (child, g_signal_lookup ("destroy", GAIL_TYPE_WINDOW), 0);
535 window_focus (GtkWidget *widget,
536 GdkEventFocus *event)
541 g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
543 atk_obj = gtk_widget_get_accessible (widget);
544 signal_name = (event->in) ? "activate" : "deactivate";
545 g_signal_emit (atk_obj, g_signal_lookup (signal_name, GAIL_TYPE_WINDOW), 0);
551 configure_event_watcher (GSignalInvocationHint *hint,
552 guint n_param_values,
553 const GValue *param_values,
556 GtkAllocation allocation;
565 object = g_value_get_object (param_values + 0);
566 if (!GTK_IS_WINDOW (object))
568 * GtkDrawingArea can send a GDK_CONFIGURE event but we ignore here
572 event = g_value_get_boxed (param_values + 1);
573 if (event->type != GDK_CONFIGURE)
575 widget = GTK_WIDGET (object);
576 gtk_widget_get_allocation (widget, &allocation);
577 if (allocation.x == ((GdkEventConfigure *)event)->x &&
578 allocation.y == ((GdkEventConfigure *)event)->y &&
579 allocation.width == ((GdkEventConfigure *)event)->width &&
580 allocation.height == ((GdkEventConfigure *)event)->height)
583 if (allocation.width != ((GdkEventConfigure *)event)->width ||
584 allocation.height != ((GdkEventConfigure *)event)->height)
586 signal_name = "resize";
590 signal_name = "move";
593 atk_obj = gtk_widget_get_accessible (widget);
594 if (GAIL_IS_WINDOW (atk_obj))
596 parent = atk_object_get_parent (atk_obj);
597 if (parent == atk_get_root ())
599 signal_id = g_signal_lookup (signal_name, GAIL_TYPE_WINDOW);
600 g_signal_emit (atk_obj, signal_id, 0);
611 G_DEFINE_TYPE (GailMisc, gail_misc, ATK_TYPE_MISC)
614 gail_misc_class_init (GailMiscClass *klass)
616 AtkMiscClass *miscclass = ATK_MISC_CLASS (klass);
617 miscclass->threads_enter =
618 gail_misc_threads_enter;
619 miscclass->threads_leave =
620 gail_misc_threads_leave;
621 atk_misc_instance = g_object_new (GAIL_TYPE_MISC, NULL);
625 gail_misc_init (GailMisc *misc)
629 static void gail_misc_threads_enter (AtkMisc *misc)
631 GDK_THREADS_ENTER ();
634 static void gail_misc_threads_leave (AtkMisc *misc)
636 GDK_THREADS_LEAVE ();