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_OBJECT, GailObject, gail_object, GTK_TYPE_OBJECT)
75 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_WIDGET, GailWidget, gail_widget, GTK_TYPE_WIDGET)
76 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_CONTAINER, GailContainer, gail_container, GTK_TYPE_CONTAINER)
77 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_BUTTON, GailButton, gail_button, GTK_TYPE_BUTTON)
78 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_MENU_ITEM, GailMenuItem, gail_menu_item, gail_menu_item_new)
79 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TOGGLE_BUTTON, GailToggleButton, gail_toggle_button, GTK_TYPE_TOGGLE_BUTTON)
80 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_IMAGE, GailImage, gail_image, GTK_TYPE_IMAGE)
81 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TEXT_VIEW, GailTextView, gail_text_view, GTK_TYPE_TEXT_VIEW)
82 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_COMBO_BOX, GailComboBox, gail_combo_box, GTK_TYPE_COMBO_BOX)
83 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_ENTRY, GailEntry, gail_entry, GTK_TYPE_ENTRY)
84 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_MENU_SHELL, GailMenuShell, gail_menu_shell, GTK_TYPE_MENU_SHELL)
85 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_MENU, GailMenu, gail_menu, GTK_TYPE_MENU)
86 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_WINDOW, GailWindow, gail_window, GTK_TYPE_BIN)
87 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_RANGE, GailRange, gail_range, GTK_TYPE_RANGE)
88 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCALE, GailScale, gail_scale, GTK_TYPE_SCALE)
89 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCALE_BUTTON, GailScaleButton, gail_scale_button, GTK_TYPE_SCALE_BUTTON)
90 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_LABEL, GailLabel, gail_label, GTK_TYPE_LABEL)
91 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_STATUSBAR, GailStatusbar, gail_statusbar, GTK_TYPE_STATUSBAR)
92 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_NOTEBOOK, GailNotebook, gail_notebook, GTK_TYPE_NOTEBOOK)
93 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_CALENDAR, GailCalendar, gail_calendar, GTK_TYPE_CALENDAR)
94 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_PROGRESS_BAR, GailProgressBar, gail_progress_bar, GTK_TYPE_PROGRESS_BAR)
95 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SPIN_BUTTON, GailSpinButton, gail_spin_button, GTK_TYPE_SPIN_BUTTON)
96 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TREE_VIEW, GailTreeView, gail_tree_view, GTK_TYPE_TREE_VIEW)
97 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_FRAME, GailFrame, gail_frame, GTK_TYPE_FRAME)
98 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_RADIO_BUTTON, GailRadioButton, gail_radio_button, GTK_TYPE_RADIO_BUTTON)
99 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_ARROW, GailArrow, gail_arrow, GTK_TYPE_ARROW)
100 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SEPARATOR, GailSeparator, gail_separator, GTK_TYPE_SEPARATOR)
101 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_BOX, GailBox, gail_box, GTK_TYPE_BOX)
102 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCROLLED_WINDOW, GailScrolledWindow, gail_scrolled_window, GTK_TYPE_SCROLLED_WINDOW)
103 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_PANED, GailPaned, gail_paned, GTK_TYPE_PANED)
104 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCROLLBAR, GailScrollbar, gail_scrollbar, GTK_TYPE_SCROLLBAR)
105 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_CHECK_MENU_ITEM, GailCheckMenuItem, gail_check_menu_item, gail_check_menu_item_new)
106 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_RADIO_MENU_ITEM, GailRadioMenuItem, gail_radio_menu_item, gail_radio_menu_item_new)
107 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_EXPANDER, GailExpander, gail_expander, GTK_TYPE_EXPANDER)
108 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_RENDERER_CELL, GailRendererCell, gail_renderer_cell, GTK_TYPE_CELL_RENDERER, gail_renderer_cell_new)
109 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_BOOLEAN_CELL, GailBooleanCell, gail_boolean_cell, GTK_TYPE_CELL_RENDERER_TOGGLE, gail_boolean_cell_new)
110 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_IMAGE_CELL, GailImageCell, gail_image_cell, GTK_TYPE_CELL_RENDERER_PIXBUF, gail_image_cell_new)
111 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_TEXT_CELL, GailTextCell, gail_text_cell, GTK_TYPE_CELL_RENDERER_TEXT, gail_text_cell_new)
114 gail_get_accessible_for_widget (GtkWidget *widget,
117 AtkObject *obj = NULL;
120 gnome_canvas = g_type_from_name ("GnomeCanvas");
126 if (GTK_IS_ENTRY (widget))
128 else if (GTK_IS_NOTEBOOK (widget))
130 GtkNotebook *notebook;
133 notebook = GTK_NOTEBOOK (widget);
134 page_num = gtk_notebook_get_current_page (notebook);
137 obj = gtk_widget_get_accessible (widget);
138 obj = atk_object_ref_accessible_child (obj, page_num);
139 g_object_unref (obj);
142 else if (G_TYPE_CHECK_INSTANCE_TYPE ((widget), gnome_canvas))
144 GObject *focused_item;
145 GValue value = {0, };
147 g_value_init (&value, G_TYPE_OBJECT);
148 g_object_get_property (G_OBJECT (widget), "focused_item", &value);
149 focused_item = g_value_get_object (&value);
155 obj = atk_gobject_accessible_for_object (G_OBJECT (focused_item));
156 tmp = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
161 else if (GTK_IS_TOGGLE_BUTTON (widget))
163 GtkWidget *other_widget = gtk_widget_get_parent (widget);
164 if (GTK_IS_COMBO_BOX (other_widget))
166 gail_set_focus_widget (other_widget, widget);
167 widget = other_widget;
172 AtkObject *focus_object;
174 obj = gtk_widget_get_accessible (widget);
175 focus_object = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
177 * We check whether the object for this focus_object has been deleted.
178 * This can happen when navigating to an empty directory in nautilus.
181 if (ATK_IS_GOBJECT_ACCESSIBLE (focus_object))
183 if (!atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (focus_object)))
194 gail_focus_watcher (GSignalInvocationHint *ihint,
195 guint n_param_values,
196 const GValue *param_values,
203 object = g_value_get_object (param_values + 0);
204 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
206 event = g_value_get_boxed (param_values + 1);
207 widget = GTK_WIDGET (object);
209 if (event->type == GDK_FOCUS_CHANGE)
211 if (event->focus_change.in)
213 if (GTK_IS_WINDOW (widget))
215 GtkWidget *focus_widget;
219 window = GTK_WINDOW (widget);
220 focus_widget = gtk_window_get_focus (window);
221 g_object_get (window, "type", &type, NULL);
226 * If we already have a potential focus widget set this
227 * windows's focus widget to focus_before_menu so that
228 * it will be reported when menu item is unset.
230 if (next_focus_widget)
232 if (GTK_IS_MENU_ITEM (next_focus_widget) &&
235 void *vp_focus_before_menu = &focus_before_menu;
236 focus_before_menu = focus_widget;
237 g_object_add_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
242 widget = focus_widget;
244 else if (type == GTK_WINDOW_POPUP)
246 if (GTK_IS_BIN (widget))
248 GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget));
250 if (GTK_IS_WIDGET (child) && gtk_widget_has_grab (child))
252 if (GTK_IS_MENU_SHELL (child))
254 if (GTK_MENU_SHELL (child)->active_menu_item)
257 * We have a menu which has a menu item selected
258 * so we do not report focus on the menu.
266 else /* popup window has no children; this edge case occurs in some custom code (OOo for instance) */
271 else /* Widget is a non-popup toplevel with no focus children;
272 don't emit for this case either, as it's useless */
280 if (next_focus_widget)
284 toplevel = gtk_widget_get_toplevel (next_focus_widget);
285 if (toplevel == widget)
286 next_focus_widget = NULL;
294 if (event->type == GDK_MOTION_NOTIFY && gtk_widget_has_focus (widget))
296 if (widget == focus_widget)
307 * If the focus widget is a GtkSocket without a plug
308 * then ignore the focus notification as the embedded
309 * plug will report a focus notification.
311 if (GTK_IS_SOCKET (widget) &&
312 GTK_SOCKET (widget)->plug_widget == NULL)
315 * The widget may not yet be visible on the screen so we wait until it is.
317 gail_focus_notify_when_idle (widget);
322 gail_select_watcher (GSignalInvocationHint *ihint,
323 guint n_param_values,
324 const GValue *param_values,
330 object = g_value_get_object (param_values + 0);
331 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
333 widget = GTK_WIDGET (object);
335 if (!gtk_widget_get_mapped (widget))
337 g_signal_connect (widget, "map",
338 G_CALLBACK (gail_map_cb),
342 gail_finish_select (widget);
348 gail_finish_select (GtkWidget *widget)
350 if (GTK_IS_MENU_ITEM (widget))
352 GtkMenuItem* menu_item;
354 menu_item = GTK_MENU_ITEM (widget);
355 if (menu_item->submenu &&
356 !gtk_widget_get_mapped (menu_item->submenu))
359 * If the submenu is not visble, wait until it is before
360 * reporting focus on the menu item.
364 handler_id = g_signal_handler_find (menu_item->submenu,
366 g_signal_lookup ("map",
370 (gpointer) gail_map_submenu_cb,
373 g_signal_connect (menu_item->submenu, "map",
374 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 if (GTK_MENU (widget)->parent_menu_item)
427 gail_finish_select (GTK_MENU (widget)->parent_menu_item);
433 gail_deselect_watcher (GSignalInvocationHint *ihint,
434 guint n_param_values,
435 const GValue *param_values,
440 GtkWidget *menu_shell;
442 object = g_value_get_object (param_values + 0);
443 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
445 widget = GTK_WIDGET (object);
447 if (!GTK_IS_MENU_ITEM (widget))
450 if (subsequent_focus_widget == widget)
451 subsequent_focus_widget = NULL;
453 menu_shell = gtk_widget_get_parent (widget);
454 if (GTK_IS_MENU_SHELL (menu_shell))
456 GtkWidget *parent_menu_shell;
458 parent_menu_shell = GTK_MENU_SHELL (menu_shell)->parent_menu_shell;
459 if (parent_menu_shell)
461 GtkWidget *active_menu_item;
463 active_menu_item = GTK_MENU_SHELL (parent_menu_shell)->active_menu_item;
464 if (active_menu_item)
466 gail_focus_notify_when_idle (active_menu_item);
471 if (!GTK_IS_MENU_BAR (menu_shell))
473 gail_focus_notify_when_idle (menu_shell);
482 gail_switch_page_watcher (GSignalInvocationHint *ihint,
483 guint n_param_values,
484 const GValue *param_values,
490 object = g_value_get_object (param_values + 0);
491 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
493 widget = GTK_WIDGET (object);
495 if (!GTK_IS_NOTEBOOK (widget))
498 if (gtk_notebook_get_current_page (GTK_NOTEBOOK (widget)) == -1)
501 gail_focus_notify_when_idle (widget);
506 gail_focus_idle_handler (gpointer data)
508 focus_notify_handler = 0;
510 * The widget which was to receive focus may have been removed
512 if (!next_focus_widget)
514 if (next_focus_widget != data)
519 void *vp_next_focus_widget = &next_focus_widget;
520 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
521 next_focus_widget = NULL;
524 gail_focus_notify (data);
530 gail_focus_notify (GtkWidget *widget)
535 if (widget != focus_widget)
539 void *vp_focus_widget = &focus_widget;
540 g_object_remove_weak_pointer (G_OBJECT (focus_widget), vp_focus_widget);
542 focus_widget = widget;
545 void *vp_focus_widget = &focus_widget;
546 g_object_add_weak_pointer (G_OBJECT (focus_widget), vp_focus_widget);
548 * The UI may not have been updated yet; e.g. in gtkhtml2
549 * html_view_layout() is called in a idle handler
551 if (focus_widget == focus_before_menu)
553 void *vp_focus_before_menu = &focus_before_menu;
554 g_object_remove_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
555 focus_before_menu = NULL;
558 gail_focus_notify_when_idle (focus_widget);
563 atk_obj = gail_get_accessible_for_widget (focus_widget, &transient);
567 * Do not report focus on redundant object
570 (atk_object_get_role(atk_obj) != ATK_ROLE_REDUNDANT_OBJECT))
571 atk_focus_tracker_notify (atk_obj);
572 if (atk_obj && transient)
573 g_object_unref (atk_obj);
574 if (subsequent_focus_widget)
576 GtkWidget *tmp_widget = subsequent_focus_widget;
577 subsequent_focus_widget = NULL;
578 gail_focus_notify_when_idle (tmp_widget);
584 gail_focus_notify_when_idle (GtkWidget *widget)
586 if (focus_notify_handler)
591 * Ignore focus request when menu item is going to be focused.
594 if (GTK_IS_MENU_ITEM (next_focus_widget) && !GTK_IS_MENU_ITEM (widget))
597 if (next_focus_widget)
599 if (GTK_IS_MENU_ITEM (next_focus_widget) && GTK_IS_MENU_ITEM (widget))
601 if (gtk_menu_item_get_submenu (GTK_MENU_ITEM (next_focus_widget)) == gtk_widget_get_parent (widget))
603 if (subsequent_focus_widget)
604 g_assert_not_reached ();
605 subsequent_focus_widget = widget;
610 g_source_remove (focus_notify_handler);
611 if (next_focus_widget)
613 void *vp_next_focus_widget = &next_focus_widget;
614 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
615 next_focus_widget = NULL;
620 * Ignore if focus is being set to NULL and we are waiting to set focus
627 void *vp_next_focus_widget = &next_focus_widget;
628 next_focus_widget = widget;
629 g_object_add_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
634 * We are about to report focus as NULL so remove the weak pointer
635 * for the widget we were waiting to report focus on.
637 if (next_focus_widget)
639 void *vp_next_focus_widget = &next_focus_widget;
640 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
641 next_focus_widget = NULL;
645 focus_notify_handler = gdk_threads_add_idle (gail_focus_idle_handler, widget);
649 gail_deactivate_watcher (GSignalInvocationHint *ihint,
650 guint n_param_values,
651 const GValue *param_values,
657 GtkWidget *focus = NULL;
659 object = g_value_get_object (param_values + 0);
660 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
661 widget = GTK_WIDGET (object);
663 g_return_val_if_fail (GTK_IS_MENU_SHELL(widget), TRUE);
664 shell = GTK_MENU_SHELL(widget);
665 if (!shell->parent_menu_shell)
666 focus = focus_before_menu;
669 * If we are waiting to report focus on a menubar or a menu item
670 * because of a previous deselect, cancel it.
673 focus_notify_handler &&
675 (GTK_IS_MENU_BAR (next_focus_widget) ||
676 GTK_IS_MENU_ITEM (next_focus_widget)))
678 void *vp_next_focus_widget = &next_focus_widget;
679 g_source_remove (focus_notify_handler);
680 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
681 next_focus_widget = NULL;
682 focus_notify_handler = 0;
683 was_deselect = FALSE;
685 gail_focus_notify_when_idle (focus);
691 gail_focus_tracker_init (void)
693 static gboolean emission_hooks_added = FALSE;
695 if (!emission_hooks_added)
698 * We cannot be sure that the classes exist so we make sure that they do.
700 g_type_class_ref (GTK_TYPE_WIDGET);
701 g_type_class_ref (GTK_TYPE_MENU_SHELL);
702 g_type_class_ref (GTK_TYPE_NOTEBOOK);
705 * We listen for event_after signal and then check that the
706 * event was a focus in event so we get called after the event.
708 g_signal_add_emission_hook (
709 g_signal_lookup ("event-after", GTK_TYPE_WIDGET), 0,
710 gail_focus_watcher, NULL, (GDestroyNotify) NULL);
712 * A "select" signal is emitted when arrow key is used to
713 * move to a list item in the popup window of a GtkCombo or
714 * a menu item in a menu.
716 g_signal_add_emission_hook (
717 g_signal_lookup ("select", GTK_TYPE_MENU_ITEM), 0,
718 gail_select_watcher, NULL, (GDestroyNotify) NULL);
721 * A "deselect" signal is emitted when arrow key is used to
722 * move from a menu item in a menu to the parent menu.
724 g_signal_add_emission_hook (
725 g_signal_lookup ("deselect", GTK_TYPE_MENU_ITEM), 0,
726 gail_deselect_watcher, NULL, (GDestroyNotify) NULL);
729 * We listen for deactivate signals on menushells to determine
730 * when the "focus" has left the menus.
732 g_signal_add_emission_hook (
733 g_signal_lookup ("deactivate", GTK_TYPE_MENU_SHELL), 0,
734 gail_deactivate_watcher, NULL, (GDestroyNotify) NULL);
737 * We listen for "switch-page" signal on a GtkNotebook to notify
738 * when page has changed because of clicking on a notebook tab.
740 g_signal_add_emission_hook (
741 g_signal_lookup ("switch-page", GTK_TYPE_NOTEBOOK), 0,
742 gail_switch_page_watcher, NULL, (GDestroyNotify) NULL);
743 emission_hooks_added = TRUE;
748 gail_focus_object_destroyed (gpointer data)
752 obj = G_OBJECT (data);
753 g_object_set_qdata (obj, quark_focus_object, NULL);
754 g_object_unref (obj);
758 gail_focus_tracker (AtkObject *focus_object)
761 * Do not report focus on redundant object
764 (atk_object_get_role(focus_object) != ATK_ROLE_REDUNDANT_OBJECT))
766 AtkObject *old_focus_object;
768 if (!GTK_IS_ACCESSIBLE (focus_object))
772 parent = focus_object;
775 parent = atk_object_get_parent (parent);
778 if (GTK_IS_ACCESSIBLE (parent))
784 gail_set_focus_object (focus_object, parent);
789 old_focus_object = g_object_get_qdata (G_OBJECT (focus_object), quark_focus_object);
790 if (old_focus_object)
792 g_object_weak_unref (G_OBJECT (old_focus_object),
793 (GWeakNotify) gail_focus_object_destroyed,
795 g_object_set_qdata (G_OBJECT (focus_object), quark_focus_object, NULL);
796 g_object_unref (G_OBJECT (focus_object));
803 gail_set_focus_widget (GtkWidget *focus_widget,
806 AtkObject *focus_obj;
809 focus_obj = gtk_widget_get_accessible (focus_widget);
810 obj = gtk_widget_get_accessible (widget);
811 gail_set_focus_object (focus_obj, obj);
815 gail_set_focus_object (AtkObject *focus_obj,
818 AtkObject *old_focus_obj;
820 old_focus_obj = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
821 if (old_focus_obj != obj)
824 g_object_weak_unref (G_OBJECT (old_focus_obj),
825 (GWeakNotify) gail_focus_object_destroyed,
829 * We call g_object_ref as if obj is destroyed
830 * while the weak reference exists then destroying the
831 * focus_obj would cause gail_focus_object_destroyed to be
832 * called when obj is not a valid GObject.
836 g_object_weak_ref (G_OBJECT (focus_obj),
837 (GWeakNotify) gail_focus_object_destroyed,
839 g_object_set_qdata (G_OBJECT (obj), quark_focus_object, focus_obj);
844 * These exported symbols are hooked by gnome-program
845 * to provide automatic module initialization and shutdown.
847 extern void gnome_accessibility_module_init (void);
848 extern void gnome_accessibility_module_shutdown (void);
850 static int gail_initialized = FALSE;
853 gail_accessibility_module_init (void)
855 const char *env_a_t_support;
856 gboolean a_t_support = FALSE;
858 if (gail_initialized)
862 gail_initialized = TRUE;
863 quark_focus_object = g_quark_from_static_string ("gail-focus-object");
865 env_a_t_support = g_getenv (GNOME_ACCESSIBILITY_ENV);
868 a_t_support = atoi (env_a_t_support);
870 fprintf (stderr, "GTK Accessibility Module initialized\n");
872 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_WIDGET, gail_widget);
873 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CONTAINER, gail_container);
874 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_BUTTON, gail_button);
875 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU_ITEM, gail_menu_item);
876 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TOGGLE_BUTTON, gail_toggle_button);
877 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_IMAGE, gail_image);
878 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TEXT_VIEW, gail_text_view);
879 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_COMBO_BOX, gail_combo_box);
880 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_ENTRY, gail_entry);
881 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU_BAR, gail_menu_shell);
882 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU, gail_menu);
883 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_WINDOW, gail_window);
884 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RANGE, gail_range);
885 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCALE, gail_scale);
886 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCALE_BUTTON, gail_scale_button);
887 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_LABEL, gail_label);
888 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_STATUSBAR, gail_statusbar);
889 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_NOTEBOOK, gail_notebook);
890 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CALENDAR, gail_calendar);
891 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_PROGRESS_BAR, gail_progress_bar);
892 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SPIN_BUTTON, gail_spin_button);
893 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TREE_VIEW, gail_tree_view);
894 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_FRAME, gail_frame);
895 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_TEXT, gail_text_cell);
896 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_TOGGLE, gail_boolean_cell);
897 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_PIXBUF, gail_image_cell);
898 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER, gail_renderer_cell);
899 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RADIO_BUTTON, gail_radio_button);
900 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_ARROW, gail_arrow);
901 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SEPARATOR, gail_separator);
902 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_BOX, gail_box);
903 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCROLLED_WINDOW, gail_scrolled_window);
904 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_PANED, gail_paned);
905 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCROLLBAR, gail_scrollbar);
906 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CHECK_MENU_ITEM, gail_check_menu_item);
907 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RADIO_MENU_ITEM, gail_radio_menu_item);
908 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_EXPANDER, gail_expander);
910 /* LIBGNOMECANVAS SUPPORT */
911 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_OBJECT, gail_object);
913 atk_focus_tracker_init (gail_focus_tracker_init);
914 focus_tracker_id = atk_add_focus_tracker (gail_focus_tracker);
916 /* Initialize the GailUtility class */
917 g_type_class_unref (g_type_class_ref (GAIL_TYPE_UTIL));
918 g_type_class_unref (g_type_class_ref (GAIL_TYPE_MISC));
922 * gnome_accessibility_module_init:
925 * This method is invoked by name from libgnome's
926 * gnome-program.c to activate accessibility support.
929 gnome_accessibility_module_init (void)
931 gail_accessibility_module_init ();
935 * gnome_accessibility_module_shutdown:
938 * This method is invoked by name from libgnome's
939 * gnome-program.c to de-activate accessibility support.
942 gnome_accessibility_module_shutdown (void)
944 if (!gail_initialized)
948 gail_initialized = FALSE;
949 atk_remove_focus_tracker (focus_tracker_id);
951 fprintf (stderr, "GTK Accessibility Module shutdown\n");
953 /* FIXME: de-register the factory types so we can unload ? */
957 gtk_module_init (gint *argc, char** argv[])
959 const char* env_no_gail;
960 gboolean no_gail = FALSE;
962 env_no_gail = g_getenv (NO_GAIL_ENV);
964 no_gail = atoi (env_no_gail);
969 gail_accessibility_module_init ();
975 g_module_check_init (GModule *module)
977 g_module_make_resident (module);