path: root/widgets/table/gal-a11y-e-tree.c

/*
 * This program 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) version 3.
 *
 * This program 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 the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Yuedong Du <yuedong.du@sun.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include "a11y/gal-a11y-util.h"
#include "table/e-table-item.h"
#include "table/e-tree.h"

#include "gal-a11y-e-table-item.h"
#include "gal-a11y-e-tree.h"
#include "gal-a11y-e-tree-factory.h"

/* backward-compatibility cruft */
#include "e-util/gtk-compat.h"

#define CS_CLASS(a11y) (G_TYPE_INSTANCE_GET_CLASS ((a11y), C_TYPE_STREAM, GalA11yETreeClass))
static AtkObjectClass *parent_class;
static GType parent_type;
static gint priv_offset;
#define GET_PRIVATE(object) ((GalA11yETreePrivate *) (((gchar *) object) + priv_offset))
#define PARENT_TYPE (parent_type)

struct _GalA11yETreePrivate {
    AtkObject *child_item;
};

/* Static functions */

static void
init_child_item (GalA11yETree *a11y)
{
    GalA11yETreePrivate *priv = GET_PRIVATE (a11y);
    ETree *tree;
    ETableItem * eti;

    tree = E_TREE (gtk_accessible_get_widget (GTK_ACCESSIBLE (a11y)));
    g_return_if_fail (tree);

    eti = e_tree_get_item (tree);
    if (priv->child_item == NULL) {
        priv->child_item = atk_gobject_accessible_for_object (G_OBJECT (eti));
    }
}

static AtkObject*
et_ref_accessible_at_point  (AtkComponent *component,
                 gint x,
                 gint y,
                 AtkCoordType coord_type)
{
    GalA11yETree *a11y = GAL_A11Y_E_TREE (component);
    init_child_item (a11y);
    return GET_PRIVATE (a11y)->child_item;
}

static gint
et_get_n_children (AtkObject *accessible)
{
    return 1;
}

static AtkObject*
et_ref_child (AtkObject *accessible,
          gint i)
{
    GalA11yETree *a11y = GAL_A11Y_E_TREE (accessible);
    if (i != 0)
        return NULL;
    init_child_item (a11y);
    g_object_ref (GET_PRIVATE (a11y)->child_item);
    return GET_PRIVATE (a11y)->child_item;
}

static AtkLayer
et_get_layer (AtkComponent *component)
{
    return ATK_LAYER_WIDGET;
}

static void
et_class_init (GalA11yETreeClass *klass)
{
    AtkObjectClass *atk_object_class = ATK_OBJECT_CLASS (klass);

    parent_class                              = g_type_class_ref (PARENT_TYPE);

    atk_object_class->get_n_children          = et_get_n_children;
    atk_object_class->ref_child               = et_ref_child;
}

static void
et_atk_component_iface_init (AtkComponentIface *iface)
{
    iface->ref_accessible_at_point = et_ref_accessible_at_point;
    iface->get_layer = et_get_layer;
}

static void
et_init (GalA11yETree *a11y)
{
    GalA11yETreePrivate *priv;

    priv = GET_PRIVATE (a11y);

    priv->child_item = NULL;
}

/**
 * gal_a11y_e_tree_get_type:
 * @void:
 *
 * Registers the &GalA11yETree class if necessary, and returns the type ID
 * associated to it.
 *
 * Return value: The type ID of the &GalA11yETree class.
 **/
GType
gal_a11y_e_tree_get_type (void)
{
    static GType type = 0;

    if (!type) {
        AtkObjectFactory *factory;

        GTypeInfo info = {
            sizeof (GalA11yETreeClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) et_class_init,
            (GClassFinalizeFunc) NULL,
            NULL, /* class_data */
            sizeof (GalA11yETree),
            0,
            (GInstanceInitFunc) et_init,
            NULL /* value_tree */
        };

        static const GInterfaceInfo atk_component_info = {
            (GInterfaceInitFunc) et_atk_component_iface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };

        factory = atk_registry_get_factory (atk_get_default_registry (), GTK_TYPE_WIDGET);
        parent_type = atk_object_factory_get_accessible_type (factory);

        type = gal_a11y_type_register_static_with_private (PARENT_TYPE, "GalA11yETree", &info, 0,
                                   sizeof (GalA11yETreePrivate), &priv_offset);
        g_type_add_interface_static (type, ATK_TYPE_COMPONENT, &atk_component_info);
    }

    return type;
}

AtkObject *
gal_a11y_e_tree_new (GObject *widget)
{
    GalA11yETree *a11y;

    a11y = g_object_new (gal_a11y_e_tree_get_type (), NULL);

    /* FIXME No way to do this in GTK 3. */
    /*GTK_ACCESSIBLE (a11y)->widget = GTK_WIDGET (widget);*/

    return ATK_OBJECT (a11y);
}

void
gal_a11y_e_tree_init (void)
{
    if (atk_get_root ())
        atk_registry_set_factory_type (atk_get_default_registry (),
                    E_TREE_TYPE,
                    gal_a11y_e_tree_factory_get_type ());

}