/* GAIL - The GNOME Accessibility Implementation Library
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gailnotebook.h"
#include "gailnotebookpage.h"
#include "gail-private-macros.h"
static void gail_notebook_class_init (GailNotebookClass *klass);
static void gail_notebook_init (GailNotebook *notebook);
static void gail_notebook_finalize (GObject *object);
static void gail_notebook_real_initialize (AtkObject *obj,
gpointer data);
static void gail_notebook_real_notify_gtk (GObject *obj,
GParamSpec *pspec);
static AtkObject* gail_notebook_ref_child (AtkObject *obj,
gint i);
static gint gail_notebook_real_remove_gtk (GtkContainer *container,
GtkWidget *widget,
gpointer data);
static void atk_selection_interface_init (AtkSelectionIface *iface);
static gboolean gail_notebook_add_selection (AtkSelection *selection,
gint i);
static AtkObject* gail_notebook_ref_selection (AtkSelection *selection,
gint i);
static gint gail_notebook_get_selection_count (AtkSelection *selection);
static gboolean gail_notebook_is_child_selected (AtkSelection *selection,
gint i);
static AtkObject* find_child_in_list (GList *list,
gint index);
static void check_cache (GailNotebook *gail_notebook,
GtkNotebook *notebook);
static void reset_cache (GailNotebook *gail_notebook,
gint index);
static void create_notebook_page_accessible (GailNotebook *gail_notebook,
GtkNotebook *notebook,
gint index,
gboolean insert_before,
GList *list);
static void gail_notebook_child_parent_set (GtkWidget *widget,
GtkWidget *old_parent,
gpointer data);
static gboolean gail_notebook_focus_cb (GtkWidget *widget,
GtkDirectionType type);
static gboolean gail_notebook_check_focus_tab (gpointer data);
static void gail_notebook_destroyed (gpointer data);
G_DEFINE_TYPE_WITH_CODE (GailNotebook, gail_notebook, GAIL_TYPE_CONTAINER,
G_IMPLEMENT_INTERFACE (ATK_TYPE_SELECTION, atk_selection_interface_init))
static void
gail_notebook_class_init (GailNotebookClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GailWidgetClass *widget_class;
GailContainerClass *container_class;
widget_class = (GailWidgetClass*)klass;
container_class = (GailContainerClass*)klass;
gobject_class->finalize = gail_notebook_finalize;
widget_class->notify_gtk = gail_notebook_real_notify_gtk;
class->ref_child = gail_notebook_ref_child;
class->initialize = gail_notebook_real_initialize;
/*
* We do not provide an implementation of get_n_children
* as the implementation in GailContainer returns the correct
* number of children.
*/
container_class->remove_gtk = gail_notebook_real_remove_gtk;
}
static void
gail_notebook_init (GailNotebook *notebook)
{
notebook->page_cache = NULL;
notebook->selected_page = -1;
notebook->focus_tab_page = -1;
notebook->remove_index = -1;
notebook->idle_focus_id = 0;
}
static AtkObject*
gail_notebook_ref_child (AtkObject *obj,
gint i)
{
AtkObject *accessible = NULL;
GailNotebook *gail_notebook;
GtkNotebook *gtk_notebook;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (obj)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return NULL;
gail_notebook = GAIL_NOTEBOOK (obj);
gtk_notebook = GTK_NOTEBOOK (widget);
if (gail_notebook->page_count < g_list_length (gtk_notebook->children))
check_cache (gail_notebook, gtk_notebook);
accessible = find_child_in_list (gail_notebook->page_cache, i);
if (accessible != NULL)
g_object_ref (accessible);
return accessible;
}
static void
gail_notebook_page_added (GtkNotebook *gtk_notebook,
GtkWidget *child,
guint page_num,
gpointer data)
{
AtkObject *atk_obj;
GailNotebook *notebook;
atk_obj = gtk_widget_get_accessible (GTK_WIDGET (gtk_notebook));
notebook = GAIL_NOTEBOOK (atk_obj);
create_notebook_page_accessible (notebook, gtk_notebook, page_num, FALSE, NULL);
notebook->page_count++;
}
static void
gail_notebook_real_initialize (AtkObject *obj,
gpointer data)
{
GailNotebook *notebook;
GtkNotebook *gtk_notebook;
gint i;
ATK_OBJECT_CLASS (gail_notebook_parent_class)->initialize (obj, data);
notebook = GAIL_NOTEBOOK (obj);
gtk_notebook = GTK_NOTEBOOK (data);
for (i = 0; i < g_list_length (gtk_notebook->children); i++)
{
create_notebook_page_accessible (notebook, gtk_notebook, i, FALSE, NULL);
}
notebook->page_count = i;
notebook->selected_page = gtk_notebook_get_current_page (gtk_notebook);
if (gtk_notebook->focus_tab && gtk_notebook->focus_tab->data)
{
notebook->focus_tab_page = g_list_index (gtk_notebook->children, gtk_notebook->focus_tab->data);
}
g_signal_connect (gtk_notebook,
"focus",
G_CALLBACK (gail_notebook_focus_cb),
NULL);
g_signal_connect (gtk_notebook,
"page-added",
G_CALLBACK (gail_notebook_page_added),
NULL);
g_object_weak_ref (G_OBJECT(gtk_notebook),
(GWeakNotify) gail_notebook_destroyed,
obj);
obj->role = ATK_ROLE_PAGE_TAB_LIST;
}
static void
gail_notebook_real_notify_gtk (GObject *obj,
GParamSpec *pspec)
{
GtkWidget *widget;
AtkObject* atk_obj;
widget = GTK_WIDGET (obj);
atk_obj = gtk_widget_get_accessible (widget);
if (strcmp (pspec->name, "page") == 0)
{
gint page_num, old_page_num;
gint focus_page_num = 0;
gint old_focus_page_num;
GailNotebook *gail_notebook;
GtkNotebook *gtk_notebook;
gail_notebook = GAIL_NOTEBOOK (atk_obj);
gtk_notebook = GTK_NOTEBOOK (widget);
if (gail_notebook->page_count < g_list_length (gtk_notebook->children))
check_cache (gail_notebook, gtk_notebook);
/*
* Notify SELECTED state change for old and new page
*/
old_page_num = gail_notebook->selected_page;
page_num = gtk_notebook_get_current_page (gtk_notebook);
gail_notebook->selected_page = page_num;
old_focus_page_num = gail_notebook->focus_tab_page;
if (gtk_notebook->focus_tab && gtk_notebook->focus_tab->data)
{
focus_page_num = g_list_index (gtk_notebook->children, gtk_notebook->focus_tab->data);
gail_notebook->focus_tab_page = focus_page_num;
}
if (page_num != old_page_num)
{
AtkObject *obj;
if (old_page_num != -1)
{
obj = gail_notebook_ref_child (atk_obj, old_page_num);
if (obj)
{
atk_object_notify_state_change (obj,
ATK_STATE_SELECTED,
FALSE);
g_object_unref (obj);
}
}
obj = gail_notebook_ref_child (atk_obj, page_num);
if (obj)
{
atk_object_notify_state_change (obj,
ATK_STATE_SELECTED,
TRUE);
g_object_unref (obj);
/*
* The page which is being displayed has changed but there is
* no need to tell the focus tracker as the focus page will also
* change or a widget in the page will receive focus if the
* Notebook does not have tabs.
*/
}
g_signal_emit_by_name (atk_obj, "selection_changed");
g_signal_emit_by_name (atk_obj, "visible_data_changed");
}
if (gtk_notebook_get_show_tabs (gtk_notebook) &&
(focus_page_num != old_focus_page_num))
{
if (gail_notebook->idle_focus_id)
g_source_remove (gail_notebook->idle_focus_id);
gail_notebook->idle_focus_id = gdk_threads_add_idle (gail_notebook_check_focus_tab, atk_obj);
}
}
else
GAIL_WIDGET_CLASS (gail_notebook_parent_class)->notify_gtk (obj, pspec);
}
static void
gail_notebook_finalize (GObject *object)
{
GailNotebook *notebook = GAIL_NOTEBOOK (object);
GList *list;
/*
* Get rid of the GailNotebookPage objects which we have cached.
*/
list = notebook->page_cache;
if (list != NULL)
{
while (list)
{
g_object_unref (list->data);
list = list->next;
}
}
g_list_free (notebook->page_cache);
if (notebook->idle_focus_id)
g_source_remove (notebook->idle_focus_id);
G_OBJECT_CLASS (gail_notebook_parent_class)->finalize (object);
}
static void
atk_selection_interface_init (AtkSelectionIface *iface)
{
iface->add_selection = gail_notebook_add_selection;
iface->ref_selection = gail_notebook_ref_selection;
iface->get_selection_count = gail_notebook_get_selection_count;
iface->is_child_selected = gail_notebook_is_child_selected;
/*
* The following don't make any sense for GtkNotebook widgets.
* Unsupported AtkSelection interfaces:
* clear_selection();
* remove_selection();
* select_all_selection();
*/
}
/*
* GtkNotebook only supports the selection of one page at a time.
* Selecting a page unselects any previous selection, so this
* changes the current selection instead of adding to it.
*/
static gboolean
gail_notebook_add_selection (AtkSelection *selection,
gint i)
{
GtkNotebook *notebook;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
notebook = GTK_NOTEBOOK (widget);
gtk_notebook_set_current_page (notebook, i);
return TRUE;
}
static AtkObject*
gail_notebook_ref_selection (AtkSelection *selection,
gint i)
{
AtkObject *accessible;
GtkWidget *widget;
GtkNotebook *notebook;
gint pagenum;
/*
* A note book can have only one selection.
*/
gail_return_val_if_fail (i == 0, NULL);
g_return_val_if_fail (GAIL_IS_NOTEBOOK (selection), NULL);
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
notebook = GTK_NOTEBOOK (widget);
pagenum = gtk_notebook_get_current_page (notebook);
gail_return_val_if_fail (pagenum != -1, NULL);
accessible = gail_notebook_ref_child (ATK_OBJECT (selection), pagenum);
return accessible;
}
/*
* Always return 1 because there can only be one page
* selected at any time
*/
static gint
gail_notebook_get_selection_count (AtkSelection *selection)
{
GtkWidget *widget;
GtkNotebook *notebook;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return 0;
notebook = GTK_NOTEBOOK (widget);
if (notebook == NULL || gtk_notebook_get_current_page (notebook) == -1)
return 0;
else
return 1;
}
static gboolean
gail_notebook_is_child_selected (AtkSelection *selection,
gint i)
{
GtkWidget *widget;
GtkNotebook *notebook;
gint pagenumber;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
notebook = GTK_NOTEBOOK (widget);
pagenumber = gtk_notebook_get_current_page(notebook);
if (pagenumber == i)
return TRUE;
else
return FALSE;
}
static AtkObject*
find_child_in_list (GList *list,
gint index)
{
AtkObject *obj = NULL;
while (list)
{
if (GAIL_NOTEBOOK_PAGE (list->data)->index == index)
{
obj = ATK_OBJECT (list->data);
break;
}
list = list->next;
}
return obj;
}
static void
check_cache (GailNotebook *gail_notebook,
GtkNotebook *notebook)
{
GList *gtk_list;
GList *gail_list;
gint i;
gtk_list = notebook->children;
gail_list = gail_notebook->page_cache;
i = 0;
while (gtk_list)
{
if (!gail_list)
{
create_notebook_page_accessible (gail_notebook, notebook, i, FALSE, NULL);
}
else if (GAIL_NOTEBOOK_PAGE (gail_list->data)->page != gtk_list->data)
{
create_notebook_page_accessible (gail_notebook, notebook, i, TRUE, gail_list);
}
else
{
gail_list = gail_list->next;
}
i++;
gtk_list = gtk_list->next;
}
gail_notebook->page_count = i;
}
static void
reset_cache (GailNotebook *gail_notebook,
gint index)
{
GList *l;
for (l = gail_notebook->page_cache; l; l = l->next)
{
if (GAIL_NOTEBOOK_PAGE (l->data)->index > index)
GAIL_NOTEBOOK_PAGE (l->data)->index -= 1;
}
}
static void
create_notebook_page_accessible (GailNotebook *gail_notebook,
GtkNotebook *notebook,
gint index,
gboolean insert_before,
GList *list)
{
AtkObject *obj;
obj = gail_notebook_page_new (notebook, index);
g_object_ref (obj);
if (insert_before)
gail_notebook->page_cache = g_list_insert_before (gail_notebook->page_cache, list, obj);
else
gail_notebook->page_cache = g_list_append (gail_notebook->page_cache, obj);
g_signal_connect (gtk_notebook_get_nth_page (notebook, index),
"parent_set",
G_CALLBACK (gail_notebook_child_parent_set),
obj);
}
static void
gail_notebook_child_parent_set (GtkWidget *widget,
GtkWidget *old_parent,
gpointer data)
{
GailNotebook *gail_notebook;
gail_return_if_fail (old_parent != NULL);
gail_notebook = GAIL_NOTEBOOK (gtk_widget_get_accessible (old_parent));
gail_notebook->remove_index = GAIL_NOTEBOOK_PAGE (data)->index;
}
static gint
gail_notebook_real_remove_gtk (GtkContainer *container,
GtkWidget *widget,
gpointer data)
{
GailNotebook *gail_notebook;
AtkObject *obj;
gint index;
g_return_val_if_fail (container != NULL, 1);
gail_notebook = GAIL_NOTEBOOK (gtk_widget_get_accessible (GTK_WIDGET (container)));
index = gail_notebook->remove_index;
gail_notebook->remove_index = -1;
obj = find_child_in_list (gail_notebook->page_cache, index);
g_return_val_if_fail (obj, 1);
gail_notebook->page_cache = g_list_remove (gail_notebook->page_cache, obj);
gail_notebook->page_count -= 1;
reset_cache (gail_notebook, index);
g_signal_emit_by_name (gail_notebook,
"children_changed::remove",
GAIL_NOTEBOOK_PAGE (obj)->index,
obj, NULL);
g_object_unref (obj);
return 1;
}
static gboolean
gail_notebook_focus_cb (GtkWidget *widget,
GtkDirectionType type)
{
AtkObject *atk_obj = gtk_widget_get_accessible (widget);
GailNotebook *gail_notebook = GAIL_NOTEBOOK (atk_obj);
switch (type)
{
case GTK_DIR_LEFT:
case GTK_DIR_RIGHT:
if (gail_notebook->idle_focus_id == 0)
gail_notebook->idle_focus_id = gdk_threads_add_idle (gail_notebook_check_focus_tab, atk_obj);
break;
default:
break;
}
return FALSE;
}
static gboolean
gail_notebook_check_focus_tab (gpointer data)
{
GtkWidget *widget;
AtkObject *atk_obj;
gint focus_page_num, old_focus_page_num;
GailNotebook *gail_notebook;
GtkNotebook *gtk_notebook;
atk_obj = ATK_OBJECT (data);
gail_notebook = GAIL_NOTEBOOK (atk_obj);
widget = GTK_ACCESSIBLE (atk_obj)->widget;
gtk_notebook = GTK_NOTEBOOK (widget);
gail_notebook->idle_focus_id = 0;
if (!gtk_notebook->focus_tab)
return FALSE;
old_focus_page_num = gail_notebook->focus_tab_page;
focus_page_num = g_list_index (gtk_notebook->children, gtk_notebook->focus_tab->data);
gail_notebook->focus_tab_page = focus_page_num;
if (old_focus_page_num != focus_page_num)
{
AtkObject *obj;
obj = atk_object_ref_accessible_child (atk_obj, focus_page_num);
atk_focus_tracker_notify (obj);
g_object_unref (obj);
}
return FALSE;
}
static void
gail_notebook_destroyed (gpointer data)
{
GailNotebook *gail_notebook = GAIL_NOTEBOOK (data);
if (gail_notebook->idle_focus_id)
{
g_source_remove (gail_notebook->idle_focus_id);
gail_notebook->idle_focus_id = 0;
}
}