path: root/a11y/e-table/gal-a11y-e-table-column-header.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:
 *      Li Yuan <li.yuan@sun.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>
#include <glib/gi18n.h>
#include <atk/atkobject.h>
#include <atk/atkregistry.h>
#include "table/e-table-header-item.h"
#include "a11y/gal-a11y-util.h"
#include "gal-a11y-e-table-column-header.h"

static GObjectClass *parent_class;
static gint priv_offset;

#define GET_PRIVATE(object) ((GalA11yETableColumnHeaderPrivate *) (((char *) object) + priv_offset))
#define PARENT_TYPE (atk_gobject_accessible_get_type ())

struct _GalA11yETableColumnHeaderPrivate {
    ETableItem *item;
    AtkObject  *parent;
    AtkStateSet *state_set;
};

static void
etch_init (GalA11yETableColumnHeader *a11y)
{
    GET_PRIVATE (a11y)->item = NULL;
    GET_PRIVATE (a11y)->parent = NULL;
    GET_PRIVATE (a11y)->state_set = NULL;
}

static AtkStateSet *
gal_a11y_e_table_column_header_ref_state_set (AtkObject *accessible)
{
    GalA11yETableColumnHeaderPrivate *priv = GET_PRIVATE (accessible);

    g_return_val_if_fail (priv->state_set, NULL);

    g_object_ref(priv->state_set);

    return priv->state_set;
}

static void
gal_a11y_e_table_column_header_real_initialize (AtkObject *obj, gpointer data)
{
    ATK_OBJECT_CLASS (parent_class)->initialize (obj, data);
}

static void
gal_a11y_e_table_column_header_dispose (GObject *object)
{
    GalA11yETableColumnHeader *a11y = GAL_A11Y_E_TABLE_COLUMN_HEADER (object);
    GalA11yETableColumnHeaderPrivate *priv = GET_PRIVATE (a11y);

    if (priv->state_set) {
        g_object_unref (priv->state_set);
        priv->state_set = NULL;
    }

    if (parent_class->dispose)
        parent_class->dispose (object);

}

static void
etch_class_init (GalA11yETableColumnHeaderClass *klass)
{
    AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_ref (PARENT_TYPE);

    object_class->dispose = gal_a11y_e_table_column_header_dispose;

    class->ref_state_set = gal_a11y_e_table_column_header_ref_state_set;
    class->initialize = gal_a11y_e_table_column_header_real_initialize;
}

inline static GObject *
etch_a11y_get_gobject (AtkGObjectAccessible *accessible)
{
    return atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (accessible));
}

static gboolean
gal_a11y_e_table_column_header_do_action (AtkAction *action,
                      gint      i)
{
    gboolean return_value = TRUE;
    GtkWidget *widget;
    GalA11yETableColumnHeader *a11y;
    ETableHeaderItem *ethi;
    ETableItem *item;
    ETableCol *col;

    switch (i) {
        case 0:
            a11y = GAL_A11Y_E_TABLE_COLUMN_HEADER (action);
            col = E_TABLE_COL (etch_a11y_get_gobject (ATK_GOBJECT_ACCESSIBLE (a11y)));
            item = GET_PRIVATE (a11y)->item;
            widget = gtk_widget_get_parent (GTK_WIDGET (item->parent.canvas));
            if (E_IS_TREE (widget)) {
                ethi = E_TABLE_HEADER_ITEM (e_tree_get_header_item (E_TREE (widget)));
            }
            else if (E_IS_TABLE (widget))
                ethi = E_TABLE_HEADER_ITEM (E_TABLE (widget)->header_item);
            else
                break;
            ethi_change_sort_state (ethi, col);
        default:
            return_value = FALSE;
            break;
    }
    return return_value;
}

static gint
gal_a11y_e_table_column_header_get_n_actions (AtkAction *action)
{
    return 1;
}

static G_CONST_RETURN gchar*
gal_a11y_e_table_column_header_action_get_name (AtkAction *action,
                        gint      i)
{
    G_CONST_RETURN gchar *return_value;

    switch (i) {
        case 0:
            return_value = _("sort");
            break;
        default:
            return_value = NULL;
            break;
    }
    return return_value;
}

static void
atk_action_interface_init (AtkActionIface *iface)
{
    g_return_if_fail (iface != NULL);

    iface->do_action = gal_a11y_e_table_column_header_do_action;
    iface->get_n_actions = gal_a11y_e_table_column_header_get_n_actions;
    iface->get_name = gal_a11y_e_table_column_header_action_get_name;
}

GType
gal_a11y_e_table_column_header_get_type (void)
{
    static GType type = 0;

    if (!type) {
        GTypeInfo info = {
            sizeof (GalA11yETableColumnHeaderClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) etch_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,
            sizeof (GalA11yETableColumnHeader),
            0,
            (GInstanceInitFunc) etch_init,
            NULL
        };
        static const GInterfaceInfo atk_action_info = {
            (GInterfaceInitFunc) atk_action_interface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };

        type = gal_a11y_type_register_static_with_private (PARENT_TYPE, "GalA11yETableColumnHeader", &info, 0,
                                sizeof (GalA11yETableColumnHeaderPrivate), &priv_offset);

        g_type_add_interface_static (type, ATK_TYPE_ACTION, &atk_action_info);
    }

    return type;
}

AtkObject *
gal_a11y_e_table_column_header_new (ETableCol *ecol, ETableItem *item)
{
    GalA11yETableColumnHeader *a11y;
    AtkObject *accessible;

    g_return_val_if_fail (E_IS_TABLE_COL (ecol), NULL);

    a11y = g_object_new (gal_a11y_e_table_column_header_get_type(), NULL);
    accessible  = ATK_OBJECT (a11y);
    atk_object_initialize (accessible, ecol);

    GET_PRIVATE (a11y)->item = item;
    GET_PRIVATE (a11y)->state_set = atk_state_set_new ();

    atk_state_set_add_state (GET_PRIVATE(a11y)->state_set, ATK_STATE_VISIBLE);
    atk_state_set_add_state (GET_PRIVATE(a11y)->state_set, ATK_STATE_SHOWING);
    atk_state_set_add_state (GET_PRIVATE(a11y)->state_set, ATK_STATE_SENSITIVE);
    atk_state_set_add_state (GET_PRIVATE(a11y)->state_set, ATK_STATE_ENABLED);

    if (ecol->text)
        atk_object_set_name (accessible, ecol->text);
    atk_object_set_role (accessible, ATK_ROLE_TABLE_COLUMN_HEADER);

    return ATK_OBJECT (a11y);
}