path: root/a11y/e-table/gal-a11y-e-cell-registry.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Authors: 
 *   Christopher James Lahey <clahey@ximian.com>
 *
 * Copyright (C) 2002 Ximian, Inc.
 */

#include <config.h>
#include "gal-a11y-e-cell-registry.h"
#include "gal-a11y-e-cell.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);
}

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

    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,
                     int                       model_col,
                     int                       view_col,
                     int                       row)
{
    GalA11yECellRegistryFunc func = NULL;
    GType type;

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

    type = GTK_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);
}