/*
 * 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:
 *		Christopher James Lahey <clahey@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "gal-a11y-e-cell.h"
#include "gal-a11y-e-cell-registry.h"

static GObjectClass *parent_class;
static GalA11yECellRegistry *default_registry;
#define PARENT_TYPE (G_TYPE_OBJECT)

struct _GalA11yECellRegistryPrivate {
	GHashTable *table;
};

/* Static functions */

static void
gal_a11y_e_cell_registry_finalize (GObject *obj)
{
	GalA11yECellRegistry *registry = GAL_A11Y_E_CELL_REGISTRY (obj);

	g_hash_table_destroy (registry->priv->table);
	g_free (registry->priv);

	G_OBJECT_CLASS (parent_class)->finalize (obj);
}

static void
gal_a11y_e_cell_registry_class_init (GalA11yECellRegistryClass *class)
{
	GObjectClass *object_class = G_OBJECT_CLASS (class);

	parent_class = g_type_class_ref (PARENT_TYPE);

	object_class->finalize = gal_a11y_e_cell_registry_finalize;
}

static void
gal_a11y_e_cell_registry_init (GalA11yECellRegistry *registry)
{
	registry->priv = g_new (GalA11yECellRegistryPrivate, 1);
	registry->priv->table = g_hash_table_new (NULL, NULL);
}

/**
 * gal_a11y_e_cell_registry_get_type:
 * @void:
 *
 * Registers the &GalA11yECellRegistry class if necessary, and returns the type ID
 * associated to it.
 *
 * Return value: The type ID of the &GalA11yECellRegistry class.
 **/
GType
gal_a11y_e_cell_registry_get_type (void)
{
	static GType type = 0;

	if (!type) {
		GTypeInfo info = {
			sizeof (GalA11yECellRegistryClass),
			(GBaseInitFunc) NULL,
			(GBaseFinalizeFunc) NULL,
			(GClassInitFunc) gal_a11y_e_cell_registry_class_init,
			(GClassFinalizeFunc) NULL,
			NULL, /* class_data */
			sizeof (GalA11yECellRegistry),
			0,
			(GInstanceInitFunc) gal_a11y_e_cell_registry_init,
			NULL /* value_cell */
		};

		type = g_type_register_static (PARENT_TYPE, "GalA11yECellRegistry", &info, 0);
	}

	return type;
}

static void
init_default_registry (void)
{
	if (default_registry == NULL) {
		default_registry = g_object_new (gal_a11y_e_cell_registry_get_type (), NULL);
	}
}

AtkObject *
gal_a11y_e_cell_registry_get_object     (GalA11yECellRegistry     *registry,
					 ETableItem               *item,
					 ECellView                *cell_view,
					 AtkObject                *parent,
					 gint                       model_col,
					 gint                       view_col,
					 gint                       row)
{
	GalA11yECellRegistryFunc func = NULL;
	GType type;

	if (registry == NULL) {
		init_default_registry ();
		registry = default_registry;
	}

	type = G_OBJECT_TYPE (cell_view->ecell);
	while (func == NULL && type != 0) {
		func = g_hash_table_lookup (registry->priv->table, GINT_TO_POINTER (type));
		type = g_type_parent (type);
	}

	if (func)
		return func (item, cell_view, parent, model_col, view_col, row);
	else
		return gal_a11y_e_cell_new (item, cell_view, parent, model_col, view_col, row);
}

void
gal_a11y_e_cell_registry_add_cell_type  (GalA11yECellRegistry     *registry,
					 GType                     type,
					 GalA11yECellRegistryFunc  func)
{
	if (registry == NULL) {
		init_default_registry ();
		registry = default_registry;
	}

	g_hash_table_insert (registry->priv->table, GINT_TO_POINTER (type), func);
}