gtk2/gtk/a11y/gtktoplevelaccessible.c

306 lines
8.2 KiB
C

/* GTK+ - accessibility implementations
* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gtk/gtkeventbox.h>
#include <gtk/gtkscrolledwindow.h>
#include <gtk/gtkframe.h>
#include <gtk/gtkmenu.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtkwindow.h>
#include "gtktoplevelaccessible.h"
struct _GtkToplevelAccessiblePrivate
{
GList *window_list;
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkToplevelAccessible, gtk_toplevel_accessible, ATK_TYPE_OBJECT)
static void
gtk_toplevel_accessible_initialize (AtkObject *accessible,
gpointer data)
{
ATK_OBJECT_CLASS (gtk_toplevel_accessible_parent_class)->initialize (accessible, data);
accessible->role = ATK_ROLE_APPLICATION;
accessible->accessible_parent = NULL;
}
static void
gtk_toplevel_accessible_object_finalize (GObject *obj)
{
GtkToplevelAccessible *toplevel = GTK_TOPLEVEL_ACCESSIBLE (obj);
if (toplevel->priv->window_list)
g_list_free (toplevel->priv->window_list);
G_OBJECT_CLASS (gtk_toplevel_accessible_parent_class)->finalize (obj);
}
static gint
gtk_toplevel_accessible_get_n_children (AtkObject *obj)
{
GtkToplevelAccessible *toplevel = GTK_TOPLEVEL_ACCESSIBLE (obj);
return g_list_length (toplevel->priv->window_list);
}
static AtkObject *
gtk_toplevel_accessible_ref_child (AtkObject *obj,
gint i)
{
GtkToplevelAccessible *toplevel;
GtkWidget *widget;
AtkObject *atk_obj;
toplevel = GTK_TOPLEVEL_ACCESSIBLE (obj);
widget = g_list_nth_data (toplevel->priv->window_list, i);
if (!widget)
return NULL;
atk_obj = gtk_widget_get_accessible (widget);
g_object_ref (atk_obj);
return atk_obj;
}
static const char *
gtk_toplevel_accessible_get_name (AtkObject *obj)
{
return g_get_prgname ();
}
static gboolean
is_combo_window (GtkWidget *widget)
{
GtkWidget *child;
AtkObject *obj;
child = gtk_bin_get_child (GTK_BIN (widget));
if (!GTK_IS_EVENT_BOX (child))
return FALSE;
child = gtk_bin_get_child (GTK_BIN (child));
if (!GTK_IS_FRAME (child))
return FALSE;
child = gtk_bin_get_child (GTK_BIN (child));
if (!GTK_IS_SCROLLED_WINDOW (child))
return FALSE;
obj = gtk_widget_get_accessible (child);
obj = atk_object_get_parent (obj);
return FALSE;
}
static gboolean
is_attached_menu_window (GtkWidget *widget)
{
GtkWidget *child;
child = gtk_bin_get_child (GTK_BIN (widget));
if (GTK_IS_MENU (child))
{
GtkWidget *attach;
attach = gtk_menu_get_attach_widget (GTK_MENU (child));
/* Allow for menu belonging to the Panel Menu, which is a GtkButton */
if (GTK_IS_MENU_ITEM (attach) || GTK_IS_BUTTON (attach))
return TRUE;
}
return FALSE;
}
static void
gtk_toplevel_accessible_class_init (GtkToplevelAccessibleClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS(klass);
GObjectClass *g_object_class = G_OBJECT_CLASS(klass);
class->initialize = gtk_toplevel_accessible_initialize;
class->get_n_children = gtk_toplevel_accessible_get_n_children;
class->ref_child = gtk_toplevel_accessible_ref_child;
class->get_parent = NULL;
class->get_name = gtk_toplevel_accessible_get_name;
g_object_class->finalize = gtk_toplevel_accessible_object_finalize;
}
static void
remove_child (GtkToplevelAccessible *toplevel,
GtkWindow *window)
{
AtkObject *atk_obj = ATK_OBJECT (toplevel);
GList *l;
guint window_count = 0;
AtkObject *child;
if (toplevel->priv->window_list)
{
GtkWindow *tmp_window;
for (l = toplevel->priv->window_list; l; l = l->next)
{
tmp_window = GTK_WINDOW (l->data);
if (window == tmp_window)
{
/* Remove the window from the window_list & emit the signal */
toplevel->priv->window_list = g_list_delete_link (toplevel->priv->window_list, l);
child = gtk_widget_get_accessible (GTK_WIDGET (window));
g_signal_emit_by_name (atk_obj, "children-changed::remove",
window_count, child, NULL);
atk_object_set_parent (child, NULL);
break;
}
window_count++;
}
}
}
static gboolean
show_event_watcher (GSignalInvocationHint *ihint,
guint n_param_values,
const GValue *param_values,
gpointer data)
{
GtkToplevelAccessible *toplevel = GTK_TOPLEVEL_ACCESSIBLE (data);
AtkObject *atk_obj = ATK_OBJECT (toplevel);
GObject *object;
GtkWidget *widget;
gint n_children;
AtkObject *child;
object = g_value_get_object (param_values + 0);
if (!GTK_IS_WINDOW (object))
return TRUE;
widget = GTK_WIDGET (object);
if (gtk_widget_get_parent (widget) ||
is_attached_menu_window (widget) ||
is_combo_window (widget))
return TRUE;
child = gtk_widget_get_accessible (widget);
if (atk_object_get_role (child) == ATK_ROLE_REDUNDANT_OBJECT ||
atk_object_get_role (child) == ATK_ROLE_TOOL_TIP)
return TRUE;
/* Add the window to the list & emit the signal */
toplevel->priv->window_list = g_list_append (toplevel->priv->window_list, widget);
n_children = g_list_length (toplevel->priv->window_list);
atk_object_set_parent (child, atk_obj);
g_signal_emit_by_name (atk_obj, "children-changed::add",
n_children - 1, child, NULL);
g_signal_connect_swapped (G_OBJECT(object), "destroy",
G_CALLBACK (remove_child), toplevel);
return TRUE;
}
static gboolean
hide_event_watcher (GSignalInvocationHint *ihint,
guint n_param_values,
const GValue *param_values,
gpointer data)
{
GtkToplevelAccessible *toplevel = GTK_TOPLEVEL_ACCESSIBLE (data);
GObject *object;
object = g_value_get_object (param_values + 0);
if (!GTK_IS_WINDOW (object))
return TRUE;
remove_child (toplevel, GTK_WINDOW (object));
return TRUE;
}
static void
gtk_toplevel_accessible_init (GtkToplevelAccessible *toplevel)
{
GtkWindow *window;
GtkWidget *widget;
GList *l;
guint signal_id;
toplevel->priv = gtk_toplevel_accessible_get_instance_private (toplevel);
l = toplevel->priv->window_list = gtk_window_list_toplevels ();
while (l)
{
window = GTK_WINDOW (l->data);
widget = GTK_WIDGET (window);
if (!window ||
!gtk_widget_get_visible (widget) ||
is_attached_menu_window (widget) ||
gtk_widget_get_parent (GTK_WIDGET (window)))
{
GList *temp_l = l->next;
toplevel->priv->window_list = g_list_delete_link (toplevel->priv->window_list, l);
l = temp_l;
}
else
{
g_signal_connect_swapped (G_OBJECT (window), "destroy",
G_CALLBACK (remove_child), toplevel);
l = l->next;
}
}
g_type_class_ref (GTK_TYPE_WINDOW);
signal_id = g_signal_lookup ("show", GTK_TYPE_WINDOW);
g_signal_add_emission_hook (signal_id, 0,
show_event_watcher, toplevel, (GDestroyNotify) NULL);
signal_id = g_signal_lookup ("hide", GTK_TYPE_WINDOW);
g_signal_add_emission_hook (signal_id, 0,
hide_event_watcher, toplevel, (GDestroyNotify) NULL);
}
/**
* gtk_toplevel_accessible_get_children:
*
* Returns: (transfer none) (element-type Gtk.Window): List of
* children.
*/
GList *
gtk_toplevel_accessible_get_children (GtkToplevelAccessible *accessible)
{
return accessible->priv->window_list;
}