1 /* GAIL - The GNOME Accessibility Implementation Library
2 * Copyright 2001 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.
27 #include "gailfactory.h"
29 #define GNOME_ACCESSIBILITY_ENV "GNOME_ACCESSIBILITY"
30 #define NO_GAIL_ENV "NO_GAIL"
32 static gboolean gail_focus_watcher (GSignalInvocationHint *ihint,
34 const GValue *param_values,
36 static gboolean gail_select_watcher (GSignalInvocationHint *ihint,
38 const GValue *param_values,
40 static gboolean gail_deselect_watcher (GSignalInvocationHint *ihint,
42 const GValue *param_values,
44 static gboolean gail_switch_page_watcher(GSignalInvocationHint *ihint,
46 const GValue *param_values,
48 static AtkObject* gail_get_accessible_for_widget (GtkWidget *widget,
50 static void gail_finish_select (GtkWidget *widget);
51 static void gail_map_cb (GtkWidget *widget);
52 static void gail_map_submenu_cb (GtkWidget *widget);
53 static gint gail_focus_idle_handler (gpointer data);
54 static void gail_focus_notify (GtkWidget *widget);
55 static void gail_focus_notify_when_idle (GtkWidget *widget);
57 static void gail_focus_tracker_init (void);
58 static void gail_focus_object_destroyed (gpointer data);
59 static void gail_focus_tracker (AtkObject *object);
60 static void gail_set_focus_widget (GtkWidget *focus_widget,
62 static void gail_set_focus_object (AtkObject *focus_obj,
65 GtkWidget* focus_widget = NULL;
66 static GtkWidget* next_focus_widget = NULL;
67 static gboolean was_deselect = FALSE;
68 static GtkWidget* subsequent_focus_widget = NULL;
69 static GtkWidget* focus_before_menu = NULL;
70 static guint focus_notify_handler = 0;
71 static guint focus_tracker_id = 0;
72 static GQuark quark_focus_object = 0;
74 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_WIDGET, GailWidget, gail_widget, GTK_TYPE_WIDGET)
75 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_CONTAINER, GailContainer, gail_container, GTK_TYPE_CONTAINER)
76 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_BUTTON, GailButton, gail_button, GTK_TYPE_BUTTON)
77 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_MENU_ITEM, GailMenuItem, gail_menu_item, gail_menu_item_new)
78 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TOGGLE_BUTTON, GailToggleButton, gail_toggle_button, GTK_TYPE_TOGGLE_BUTTON)
79 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_IMAGE, GailImage, gail_image, GTK_TYPE_IMAGE)
80 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TEXT_VIEW, GailTextView, gail_text_view, GTK_TYPE_TEXT_VIEW)
81 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_COMBO_BOX, GailComboBox, gail_combo_box, GTK_TYPE_COMBO_BOX)
82 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_ENTRY, GailEntry, gail_entry, GTK_TYPE_ENTRY)
83 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_MENU_SHELL, GailMenuShell, gail_menu_shell, GTK_TYPE_MENU_SHELL)
84 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_MENU, GailMenu, gail_menu, GTK_TYPE_MENU)
85 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_WINDOW, GailWindow, gail_window, GTK_TYPE_BIN)
86 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_RANGE, GailRange, gail_range, GTK_TYPE_RANGE)
87 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCALE, GailScale, gail_scale, GTK_TYPE_SCALE)
88 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCALE_BUTTON, GailScaleButton, gail_scale_button, GTK_TYPE_SCALE_BUTTON)
89 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_LABEL, GailLabel, gail_label, GTK_TYPE_LABEL)
90 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_STATUSBAR, GailStatusbar, gail_statusbar, GTK_TYPE_STATUSBAR)
91 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_NOTEBOOK, GailNotebook, gail_notebook, GTK_TYPE_NOTEBOOK)
92 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_CALENDAR, GailCalendar, gail_calendar, GTK_TYPE_CALENDAR)
93 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_PROGRESS_BAR, GailProgressBar, gail_progress_bar, GTK_TYPE_PROGRESS_BAR)
94 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SPIN_BUTTON, GailSpinButton, gail_spin_button, GTK_TYPE_SPIN_BUTTON)
95 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TREE_VIEW, GailTreeView, gail_tree_view, GTK_TYPE_TREE_VIEW)
96 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_FRAME, GailFrame, gail_frame, GTK_TYPE_FRAME)
97 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_RADIO_BUTTON, GailRadioButton, gail_radio_button, GTK_TYPE_RADIO_BUTTON)
98 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_ARROW, GailArrow, gail_arrow, GTK_TYPE_ARROW)
99 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SEPARATOR, GailSeparator, gail_separator, GTK_TYPE_SEPARATOR)
100 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_BOX, GailBox, gail_box, GTK_TYPE_BOX)
101 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCROLLED_WINDOW, GailScrolledWindow, gail_scrolled_window, GTK_TYPE_SCROLLED_WINDOW)
102 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_PANED, GailPaned, gail_paned, GTK_TYPE_PANED)
103 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCROLLBAR, GailScrollbar, gail_scrollbar, GTK_TYPE_SCROLLBAR)
104 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_CHECK_MENU_ITEM, GailCheckMenuItem, gail_check_menu_item, gail_check_menu_item_new)
105 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_RADIO_MENU_ITEM, GailRadioMenuItem, gail_radio_menu_item, gail_radio_menu_item_new)
106 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_EXPANDER, GailExpander, gail_expander, GTK_TYPE_EXPANDER)
107 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_RENDERER_CELL, GailRendererCell, gail_renderer_cell, GTK_TYPE_CELL_RENDERER, gail_renderer_cell_new)
108 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_BOOLEAN_CELL, GailBooleanCell, gail_boolean_cell, GTK_TYPE_CELL_RENDERER_TOGGLE, gail_boolean_cell_new)
109 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_IMAGE_CELL, GailImageCell, gail_image_cell, GTK_TYPE_CELL_RENDERER_PIXBUF, gail_image_cell_new)
110 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_TEXT_CELL, GailTextCell, gail_text_cell, GTK_TYPE_CELL_RENDERER_TEXT, gail_text_cell_new)
113 gail_get_accessible_for_widget (GtkWidget *widget,
116 AtkObject *obj = NULL;
119 gnome_canvas = g_type_from_name ("GnomeCanvas");
125 if (GTK_IS_ENTRY (widget))
127 else if (GTK_IS_NOTEBOOK (widget))
129 GtkNotebook *notebook;
132 notebook = GTK_NOTEBOOK (widget);
133 page_num = gtk_notebook_get_current_page (notebook);
136 obj = gtk_widget_get_accessible (widget);
137 obj = atk_object_ref_accessible_child (obj, page_num);
138 g_object_unref (obj);
141 else if (G_TYPE_CHECK_INSTANCE_TYPE ((widget), gnome_canvas))
143 GObject *focused_item;
144 GValue value = {0, };
146 g_value_init (&value, G_TYPE_OBJECT);
147 g_object_get_property (G_OBJECT (widget), "focused_item", &value);
148 focused_item = g_value_get_object (&value);
154 obj = atk_gobject_accessible_for_object (G_OBJECT (focused_item));
155 tmp = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
160 else if (GTK_IS_TOGGLE_BUTTON (widget))
162 GtkWidget *other_widget = gtk_widget_get_parent (widget);
163 if (GTK_IS_COMBO_BOX (other_widget))
165 gail_set_focus_widget (other_widget, widget);
166 widget = other_widget;
171 AtkObject *focus_object;
173 obj = gtk_widget_get_accessible (widget);
174 focus_object = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
176 * We check whether the object for this focus_object has been deleted.
177 * This can happen when navigating to an empty directory in nautilus.
180 if (ATK_IS_GOBJECT_ACCESSIBLE (focus_object))
182 if (!atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (focus_object)))
193 gail_focus_watcher (GSignalInvocationHint *ihint,
194 guint n_param_values,
195 const GValue *param_values,
202 object = g_value_get_object (param_values + 0);
203 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
205 event = g_value_get_boxed (param_values + 1);
206 widget = GTK_WIDGET (object);
208 if (event->type == GDK_FOCUS_CHANGE)
210 if (event->focus_change.in)
212 if (GTK_IS_WINDOW (widget))
214 GtkWidget *focus_widget;
218 window = GTK_WINDOW (widget);
219 focus_widget = gtk_window_get_focus (window);
220 g_object_get (window, "type", &type, NULL);
225 * If we already have a potential focus widget set this
226 * windows's focus widget to focus_before_menu so that
227 * it will be reported when menu item is unset.
229 if (next_focus_widget)
231 if (GTK_IS_MENU_ITEM (next_focus_widget) &&
234 void *vp_focus_before_menu = &focus_before_menu;
235 focus_before_menu = focus_widget;
236 g_object_add_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
241 widget = focus_widget;
243 else if (type == GTK_WINDOW_POPUP)
245 if (GTK_IS_BIN (widget))
247 GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget));
249 if (GTK_IS_WIDGET (child) && gtk_widget_has_grab (child))
251 if (GTK_IS_MENU_SHELL (child))
253 if (gtk_menu_shell_get_selected_item (GTK_MENU_SHELL (child)))
256 * We have a menu which has a menu item selected
257 * so we do not report focus on the menu.
265 else /* popup window has no children; this edge case occurs in some custom code (OOo for instance) */
270 else /* Widget is a non-popup toplevel with no focus children;
271 don't emit for this case either, as it's useless */
279 if (next_focus_widget)
283 toplevel = gtk_widget_get_toplevel (next_focus_widget);
284 if (toplevel == widget)
285 next_focus_widget = NULL;
293 if (event->type == GDK_MOTION_NOTIFY && gtk_widget_has_focus (widget))
295 if (widget == focus_widget)
306 * If the focus widget is a GtkSocket without a plug
307 * then ignore the focus notification as the embedded
308 * plug will report a focus notification.
310 if (GTK_IS_SOCKET (widget) &&
311 gtk_socket_get_plug_window (GTK_SOCKET (widget)) != NULL)
314 * The widget may not yet be visible on the screen so we wait until it is.
316 gail_focus_notify_when_idle (widget);
321 gail_select_watcher (GSignalInvocationHint *ihint,
322 guint n_param_values,
323 const GValue *param_values,
329 object = g_value_get_object (param_values + 0);
330 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
332 widget = GTK_WIDGET (object);
334 if (!gtk_widget_get_mapped (widget))
336 g_signal_connect (widget, "map",
337 G_CALLBACK (gail_map_cb),
341 gail_finish_select (widget);
347 gail_finish_select (GtkWidget *widget)
349 if (GTK_IS_MENU_ITEM (widget))
351 GtkMenuItem* menu_item;
354 menu_item = GTK_MENU_ITEM (widget);
355 submenu = gtk_menu_item_get_submenu (menu_item);
357 !gtk_widget_get_mapped (submenu))
360 * If the submenu is not visble, wait until it is before
361 * reporting focus on the menu item.
365 handler_id = g_signal_handler_find (submenu,
367 g_signal_lookup ("map",
371 (gpointer) gail_map_submenu_cb,
374 g_signal_connect (submenu, "map",
375 G_CALLBACK (gail_map_submenu_cb),
380 * If we are waiting to report focus on a menubar or a menu item
381 * because of a previous deselect, cancel it.
384 focus_notify_handler &&
386 (GTK_IS_MENU_BAR (next_focus_widget) ||
387 GTK_IS_MENU_ITEM (next_focus_widget)))
389 void *vp_next_focus_widget = &next_focus_widget;
390 g_source_remove (focus_notify_handler);
391 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
392 next_focus_widget = NULL;
393 focus_notify_handler = 0;
394 was_deselect = FALSE;
398 * If previously focused widget is not a GtkMenuItem or a GtkMenu,
399 * keep track of it so we can return to it after menubar is deactivated
402 !GTK_IS_MENU_ITEM (focus_widget) &&
403 !GTK_IS_MENU (focus_widget))
405 void *vp_focus_before_menu = &focus_before_menu;
406 focus_before_menu = focus_widget;
407 g_object_add_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
410 gail_focus_notify_when_idle (widget);
416 gail_map_cb (GtkWidget *widget)
418 gail_finish_select (widget);
422 gail_map_submenu_cb (GtkWidget *widget)
424 if (GTK_IS_MENU (widget))
426 GtkWidget *parent_menu_item;
428 parent_menu_item = gtk_menu_get_attach_widget (GTK_MENU (widget));
429 if (parent_menu_item)
430 gail_finish_select (parent_menu_item);
436 gail_deselect_watcher (GSignalInvocationHint *ihint,
437 guint n_param_values,
438 const GValue *param_values,
443 GtkWidget *menu_shell;
445 object = g_value_get_object (param_values + 0);
446 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
448 widget = GTK_WIDGET (object);
450 if (!GTK_IS_MENU_ITEM (widget))
453 if (subsequent_focus_widget == widget)
454 subsequent_focus_widget = NULL;
456 menu_shell = gtk_widget_get_parent (widget);
457 if (GTK_IS_MENU_SHELL (menu_shell))
459 GtkWidget *parent_menu_shell;
461 parent_menu_shell = gtk_menu_shell_get_parent_shell (GTK_MENU_SHELL (menu_shell));
462 if (parent_menu_shell)
464 GtkWidget *active_menu_item;
466 active_menu_item = gtk_menu_shell_get_selected_item (GTK_MENU_SHELL (parent_menu_shell));
467 if (active_menu_item)
469 gail_focus_notify_when_idle (active_menu_item);
474 if (!GTK_IS_MENU_BAR (menu_shell))
476 gail_focus_notify_when_idle (menu_shell);
485 gail_switch_page_watcher (GSignalInvocationHint *ihint,
486 guint n_param_values,
487 const GValue *param_values,
493 object = g_value_get_object (param_values + 0);
494 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
496 widget = GTK_WIDGET (object);
498 if (!GTK_IS_NOTEBOOK (widget))
501 if (gtk_notebook_get_current_page (GTK_NOTEBOOK (widget)) == -1)
504 gail_focus_notify_when_idle (widget);
509 gail_focus_idle_handler (gpointer data)
511 focus_notify_handler = 0;
513 * The widget which was to receive focus may have been removed
515 if (!next_focus_widget)
517 if (next_focus_widget != data)
522 void *vp_next_focus_widget = &next_focus_widget;
523 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
524 next_focus_widget = NULL;
527 gail_focus_notify (data);
533 gail_focus_notify (GtkWidget *widget)
538 if (widget != focus_widget)
542 void *vp_focus_widget = &focus_widget;
543 g_object_remove_weak_pointer (G_OBJECT (focus_widget), vp_focus_widget);
545 focus_widget = widget;
548 void *vp_focus_widget = &focus_widget;
549 g_object_add_weak_pointer (G_OBJECT (focus_widget), vp_focus_widget);
551 * The UI may not have been updated yet; e.g. in gtkhtml2
552 * html_view_layout() is called in a idle handler
554 if (focus_widget == focus_before_menu)
556 void *vp_focus_before_menu = &focus_before_menu;
557 g_object_remove_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
558 focus_before_menu = NULL;
561 gail_focus_notify_when_idle (focus_widget);
566 atk_obj = gail_get_accessible_for_widget (focus_widget, &transient);
570 * Do not report focus on redundant object
573 (atk_object_get_role(atk_obj) != ATK_ROLE_REDUNDANT_OBJECT))
574 atk_focus_tracker_notify (atk_obj);
575 if (atk_obj && transient)
576 g_object_unref (atk_obj);
577 if (subsequent_focus_widget)
579 GtkWidget *tmp_widget = subsequent_focus_widget;
580 subsequent_focus_widget = NULL;
581 gail_focus_notify_when_idle (tmp_widget);
587 gail_focus_notify_when_idle (GtkWidget *widget)
589 if (focus_notify_handler)
594 * Ignore focus request when menu item is going to be focused.
597 if (GTK_IS_MENU_ITEM (next_focus_widget) && !GTK_IS_MENU_ITEM (widget))
600 if (next_focus_widget)
602 if (GTK_IS_MENU_ITEM (next_focus_widget) && GTK_IS_MENU_ITEM (widget))
604 if (gtk_menu_item_get_submenu (GTK_MENU_ITEM (next_focus_widget)) == gtk_widget_get_parent (widget))
606 if (subsequent_focus_widget)
607 g_assert_not_reached ();
608 subsequent_focus_widget = widget;
613 g_source_remove (focus_notify_handler);
614 if (next_focus_widget)
616 void *vp_next_focus_widget = &next_focus_widget;
617 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
618 next_focus_widget = NULL;
623 * Ignore if focus is being set to NULL and we are waiting to set focus
630 void *vp_next_focus_widget = &next_focus_widget;
631 next_focus_widget = widget;
632 g_object_add_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
637 * We are about to report focus as NULL so remove the weak pointer
638 * for the widget we were waiting to report focus on.
640 if (next_focus_widget)
642 void *vp_next_focus_widget = &next_focus_widget;
643 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
644 next_focus_widget = NULL;
648 focus_notify_handler = gdk_threads_add_idle (gail_focus_idle_handler, widget);
652 gail_deactivate_watcher (GSignalInvocationHint *ihint,
653 guint n_param_values,
654 const GValue *param_values,
660 GtkWidget *focus = NULL;
662 object = g_value_get_object (param_values + 0);
663 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
664 widget = GTK_WIDGET (object);
666 g_return_val_if_fail (GTK_IS_MENU_SHELL(widget), TRUE);
667 shell = GTK_MENU_SHELL(widget);
668 if (! gtk_menu_shell_get_parent_shell (shell))
669 focus = focus_before_menu;
672 * If we are waiting to report focus on a menubar or a menu item
673 * because of a previous deselect, cancel it.
676 focus_notify_handler &&
678 (GTK_IS_MENU_BAR (next_focus_widget) ||
679 GTK_IS_MENU_ITEM (next_focus_widget)))
681 void *vp_next_focus_widget = &next_focus_widget;
682 g_source_remove (focus_notify_handler);
683 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
684 next_focus_widget = NULL;
685 focus_notify_handler = 0;
686 was_deselect = FALSE;
688 gail_focus_notify_when_idle (focus);
694 gail_focus_tracker_init (void)
696 static gboolean emission_hooks_added = FALSE;
698 if (!emission_hooks_added)
701 * We cannot be sure that the classes exist so we make sure that they do.
703 g_type_class_ref (GTK_TYPE_WIDGET);
704 g_type_class_ref (GTK_TYPE_MENU_ITEM);
705 g_type_class_ref (GTK_TYPE_MENU_SHELL);
706 g_type_class_ref (GTK_TYPE_NOTEBOOK);
709 * We listen for event_after signal and then check that the
710 * event was a focus in event so we get called after the event.
712 g_signal_add_emission_hook (
713 g_signal_lookup ("event-after", GTK_TYPE_WIDGET), 0,
714 gail_focus_watcher, NULL, (GDestroyNotify) NULL);
716 * A "select" signal is emitted when arrow key is used to
717 * move to a list item in the popup window of a GtkCombo or
718 * a menu item in a menu.
720 g_signal_add_emission_hook (
721 g_signal_lookup ("select", GTK_TYPE_MENU_ITEM), 0,
722 gail_select_watcher, NULL, (GDestroyNotify) NULL);
725 * A "deselect" signal is emitted when arrow key is used to
726 * move from a menu item in a menu to the parent menu.
728 g_signal_add_emission_hook (
729 g_signal_lookup ("deselect", GTK_TYPE_MENU_ITEM), 0,
730 gail_deselect_watcher, NULL, (GDestroyNotify) NULL);
733 * We listen for deactivate signals on menushells to determine
734 * when the "focus" has left the menus.
736 g_signal_add_emission_hook (
737 g_signal_lookup ("deactivate", GTK_TYPE_MENU_SHELL), 0,
738 gail_deactivate_watcher, NULL, (GDestroyNotify) NULL);
741 * We listen for "switch-page" signal on a GtkNotebook to notify
742 * when page has changed because of clicking on a notebook tab.
744 g_signal_add_emission_hook (
745 g_signal_lookup ("switch-page", GTK_TYPE_NOTEBOOK), 0,
746 gail_switch_page_watcher, NULL, (GDestroyNotify) NULL);
747 emission_hooks_added = TRUE;
752 gail_focus_object_destroyed (gpointer data)
756 obj = G_OBJECT (data);
757 g_object_set_qdata (obj, quark_focus_object, NULL);
758 g_object_unref (obj);
762 gail_focus_tracker (AtkObject *focus_object)
765 * Do not report focus on redundant object
768 (atk_object_get_role(focus_object) != ATK_ROLE_REDUNDANT_OBJECT))
770 AtkObject *old_focus_object;
772 if (!GTK_IS_ACCESSIBLE (focus_object))
776 parent = focus_object;
779 parent = atk_object_get_parent (parent);
782 if (GTK_IS_ACCESSIBLE (parent))
788 gail_set_focus_object (focus_object, parent);
793 old_focus_object = g_object_get_qdata (G_OBJECT (focus_object), quark_focus_object);
794 if (old_focus_object)
796 g_object_weak_unref (G_OBJECT (old_focus_object),
797 (GWeakNotify) gail_focus_object_destroyed,
799 g_object_set_qdata (G_OBJECT (focus_object), quark_focus_object, NULL);
800 g_object_unref (G_OBJECT (focus_object));
807 gail_set_focus_widget (GtkWidget *focus_widget,
810 AtkObject *focus_obj;
813 focus_obj = gtk_widget_get_accessible (focus_widget);
814 obj = gtk_widget_get_accessible (widget);
815 gail_set_focus_object (focus_obj, obj);
819 gail_set_focus_object (AtkObject *focus_obj,
822 AtkObject *old_focus_obj;
824 old_focus_obj = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
825 if (old_focus_obj != obj)
828 g_object_weak_unref (G_OBJECT (old_focus_obj),
829 (GWeakNotify) gail_focus_object_destroyed,
833 * We call g_object_ref as if obj is destroyed
834 * while the weak reference exists then destroying the
835 * focus_obj would cause gail_focus_object_destroyed to be
836 * called when obj is not a valid GObject.
840 g_object_weak_ref (G_OBJECT (focus_obj),
841 (GWeakNotify) gail_focus_object_destroyed,
843 g_object_set_qdata (G_OBJECT (obj), quark_focus_object, focus_obj);
848 * These exported symbols are hooked by gnome-program
849 * to provide automatic module initialization and shutdown.
851 extern void gnome_accessibility_module_init (void);
852 extern void gnome_accessibility_module_shutdown (void);
854 static int gail_initialized = FALSE;
857 gail_accessibility_module_init (void)
859 const char *env_a_t_support;
860 gboolean a_t_support = FALSE;
862 if (gail_initialized)
866 gail_initialized = TRUE;
867 quark_focus_object = g_quark_from_static_string ("gail-focus-object");
869 env_a_t_support = g_getenv (GNOME_ACCESSIBILITY_ENV);
872 a_t_support = atoi (env_a_t_support);
874 fprintf (stderr, "GTK Accessibility Module initialized\n");
876 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_WIDGET, gail_widget);
877 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CONTAINER, gail_container);
878 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_BUTTON, gail_button);
879 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU_ITEM, gail_menu_item);
880 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TOGGLE_BUTTON, gail_toggle_button);
881 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_IMAGE, gail_image);
882 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TEXT_VIEW, gail_text_view);
883 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_COMBO_BOX, gail_combo_box);
884 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_ENTRY, gail_entry);
885 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU_BAR, gail_menu_shell);
886 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU, gail_menu);
887 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_WINDOW, gail_window);
888 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RANGE, gail_range);
889 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCALE, gail_scale);
890 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCALE_BUTTON, gail_scale_button);
891 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_LABEL, gail_label);
892 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_STATUSBAR, gail_statusbar);
893 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_NOTEBOOK, gail_notebook);
894 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CALENDAR, gail_calendar);
895 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_PROGRESS_BAR, gail_progress_bar);
896 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SPIN_BUTTON, gail_spin_button);
897 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TREE_VIEW, gail_tree_view);
898 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_FRAME, gail_frame);
899 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_TEXT, gail_text_cell);
900 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_TOGGLE, gail_boolean_cell);
901 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_PIXBUF, gail_image_cell);
902 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER, gail_renderer_cell);
903 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RADIO_BUTTON, gail_radio_button);
904 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_ARROW, gail_arrow);
905 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SEPARATOR, gail_separator);
906 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_BOX, gail_box);
907 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCROLLED_WINDOW, gail_scrolled_window);
908 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_PANED, gail_paned);
909 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCROLLBAR, gail_scrollbar);
910 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CHECK_MENU_ITEM, gail_check_menu_item);
911 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RADIO_MENU_ITEM, gail_radio_menu_item);
912 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_EXPANDER, gail_expander);
914 atk_focus_tracker_init (gail_focus_tracker_init);
915 focus_tracker_id = atk_add_focus_tracker (gail_focus_tracker);
917 /* Initialize the GailUtility class */
918 g_type_class_unref (g_type_class_ref (GAIL_TYPE_UTIL));
919 g_type_class_unref (g_type_class_ref (GAIL_TYPE_MISC));
923 * gnome_accessibility_module_init:
926 * This method is invoked by name from libgnome's
927 * gnome-program.c to activate accessibility support.
930 gnome_accessibility_module_init (void)
932 gail_accessibility_module_init ();
936 * gnome_accessibility_module_shutdown:
939 * This method is invoked by name from libgnome's
940 * gnome-program.c to de-activate accessibility support.
943 gnome_accessibility_module_shutdown (void)
945 if (!gail_initialized)
949 gail_initialized = FALSE;
950 atk_remove_focus_tracker (focus_tracker_id);
952 fprintf (stderr, "GTK Accessibility Module shutdown\n");
954 /* FIXME: de-register the factory types so we can unload ? */
958 gtk_module_init (gint *argc, char** argv[])
960 const char* env_no_gail;
961 gboolean no_gail = FALSE;
963 env_no_gail = g_getenv (NO_GAIL_ENV);
965 no_gail = atoi (env_no_gail);
970 gail_accessibility_module_init ();
976 g_module_check_init (GModule *module)
978 g_module_make_resident (module);