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/* eel-accessibility.h - Utility functions for accessibility
Copyright (C) 2002 Anders Carlsson, Sun Microsystems, Inc.
The Eel Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Eel 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Eel Library; see the file COPYING.LIB. If not,
see <http://www.gnu.org/licenses/>.
Authors:
Anders Carlsson <andersca@gnu.org>
Michael Meeks <michael@ximian.com>
*/
#include <config.h>
#include <gtk/gtk.h>
#include <atk/atkrelationset.h>
#include <eel/eel-accessibility.h>
void
eel_accessibility_set_up_label_widget_relation (GtkWidget *label, GtkWidget *widget)
{
AtkObject *atk_widget, *atk_label;
atk_label = gtk_widget_get_accessible (label);
atk_widget = gtk_widget_get_accessible (widget);
/* Create the label -> widget relation */
atk_object_add_relationship (atk_label, ATK_RELATION_LABEL_FOR, atk_widget);
/* Create the widget -> label relation */
atk_object_add_relationship (atk_widget, ATK_RELATION_LABELLED_BY, atk_label);
}
static GQuark
get_quark_gobject (void)
{
static GQuark quark_accessible_gobject = 0;
if (!quark_accessible_gobject) {
quark_accessible_gobject = g_quark_from_static_string
("object-for-accessible");
}
return quark_accessible_gobject;
}
/**
* eel_accessibility_get_gobject:
* @object: an AtkObject
*
* gets the GObject associated with the AtkObject, for which
* @object provides accessibility support.
*
* Return value: the accessible's associated GObject
**/
gpointer
eel_accessibility_get_gobject (AtkObject *object)
{
return g_object_get_qdata (G_OBJECT (object), get_quark_gobject ());
}
static GailTextUtil *
get_simple_text (gpointer object)
{
GObject *gobject;
EelAccessibleTextIface *aif;
if (GTK_IS_ACCESSIBLE (object)) {
gobject = G_OBJECT (gtk_accessible_get_widget (GTK_ACCESSIBLE (object)));
} else {
gobject = eel_accessibility_get_gobject (object);
}
if (!gobject) {
return NULL;
}
aif = EEL_ACCESSIBLE_TEXT_GET_IFACE (gobject);
if (!aif) {
g_warning ("No accessible text inferface on '%s'",
g_type_name_from_instance ((gpointer) gobject));
} else if (aif->get_text) {
return aif->get_text (gobject);
}
return NULL;
}
char *
eel_accessibility_text_get_text (AtkText *text,
gint start_pos,
gint end_pos)
{
GailTextUtil *util = get_simple_text (text);
g_return_val_if_fail (util != NULL, NULL);
return gail_text_util_get_substring (util, start_pos, end_pos);
}
gunichar
eel_accessibility_text_get_character_at_offset (AtkText *text,
gint offset)
{
char *txt, *index;
gint sucks1 = 0, sucks2 = -1;
gunichar c;
GailTextUtil *util = get_simple_text (text);
g_return_val_if_fail (util != NULL, 0);
txt = gail_text_util_get_substring (util, sucks1, sucks2);
index = g_utf8_offset_to_pointer (txt, offset);
c = g_utf8_get_char (index);
g_free (txt);
return c;
}
char *
eel_accessibility_text_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GailTextUtil *util = get_simple_text (text);
g_return_val_if_fail (util != NULL, NULL);
return gail_text_util_get_text (
util, NULL, GAIL_BEFORE_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
char *
eel_accessibility_text_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GailTextUtil *util = get_simple_text (text);
g_return_val_if_fail (util != NULL, NULL);
return gail_text_util_get_text (
util, NULL, GAIL_AT_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
gchar*
eel_accessibility_text_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GailTextUtil *util = get_simple_text (text);
g_return_val_if_fail (util != NULL, NULL);
return gail_text_util_get_text (
util, NULL, GAIL_AFTER_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
gint
eel_accessibility_text_get_character_count (AtkText *text)
{
GailTextUtil *util = get_simple_text (text);
g_return_val_if_fail (util != NULL, -1);
return gtk_text_buffer_get_char_count (util->buffer);
}
GType
eel_accessible_text_get_type (void)
{
static GType type = 0;
if (!type) {
const GTypeInfo tinfo = {
sizeof (AtkTextIface),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) NULL,
(GClassFinalizeFunc) NULL
};
type = g_type_register_static (
G_TYPE_INTERFACE, "EelAccessibleText", &tinfo, 0);
}
return type;
}
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