path: root/shell/e-uri-schema-registry.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-uri-schema-registry.c
 *
 * Copyright (C) 2001  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Ettore Perazzoli <ettore@ximian.com>
 */

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

#include "e-uri-schema-registry.h"

#include <gal/util/e-util.h>


#define PARENT_TYPE gtk_object_get_type ()
static GtkObjectClass *parent_class = NULL;

struct _SchemaHandler {
    char *schema;
    EvolutionShellComponentClient *component;
};
typedef struct _SchemaHandler SchemaHandler;

struct _EUriSchemaRegistryPrivate {
    GHashTable *schema_to_handler;
};


/* SchemaHandler.  */

static SchemaHandler *
schema_handler_new (const char *schema,
            EvolutionShellComponentClient *component)
{
    SchemaHandler *handler;

    handler = g_new (SchemaHandler, 1);
    handler->schema    = g_strdup (schema);
    handler->component = component;

    bonobo_object_ref (BONOBO_OBJECT (component));

    return handler;
}

static void
schema_handler_free (SchemaHandler *handler)
{
    g_free (handler->schema);
    bonobo_object_unref (BONOBO_OBJECT (handler->component));

    g_free (handler);
}


static void
schema_to_handler_destroy_foreach_callback (void *key,
                        void *value,
                        void *data)
{
    schema_handler_free ((SchemaHandler *) value);
}


/* GtkObject methods.  */

static void
impl_destroy (GtkObject *object)
{
    EUriSchemaRegistry *registry;
    EUriSchemaRegistryPrivate *priv;

    registry = E_URI_SCHEMA_REGISTRY (object);
    priv = registry->priv;

    g_hash_table_foreach (priv->schema_to_handler, schema_to_handler_destroy_foreach_callback, NULL);
    g_hash_table_destroy (priv->schema_to_handler);
    g_free (priv);

    (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


static void
class_init (GtkObjectClass *object_class)
{
    parent_class = gtk_type_class (PARENT_TYPE);

    object_class->destroy = impl_destroy;
}

static void
init (EUriSchemaRegistry *uri_schema_registry)
{
    EUriSchemaRegistryPrivate *priv;

    priv = g_new (EUriSchemaRegistryPrivate, 1);
    priv->schema_to_handler = g_hash_table_new (g_str_hash, g_str_equal);

    uri_schema_registry->priv = priv;
}


EUriSchemaRegistry *
e_uri_schema_registry_new (void)
{
    EUriSchemaRegistry *registry;

    registry = gtk_type_new (e_uri_schema_registry_get_type ());

    return registry;
}


gboolean
e_uri_schema_registry_set_handler_for_schema (EUriSchemaRegistry *registry,
                          const char *schema,
                          EvolutionShellComponentClient *shell_component)
{
    EUriSchemaRegistryPrivate *priv;
    SchemaHandler *existing_handler;
    SchemaHandler *new_handler;

    g_return_val_if_fail (registry != NULL, FALSE);
    g_return_val_if_fail (E_IS_URI_SCHEMA_REGISTRY (registry), FALSE);
    g_return_val_if_fail (schema != NULL, FALSE);
    g_return_val_if_fail (shell_component == NULL || EVOLUTION_IS_SHELL_COMPONENT_CLIENT (shell_component), FALSE);

    priv = registry->priv;

    existing_handler = g_hash_table_lookup (priv->schema_to_handler, schema);
    if (existing_handler != NULL)
        return FALSE;

    new_handler = schema_handler_new (schema, shell_component);
    g_hash_table_insert (priv->schema_to_handler, new_handler->schema, new_handler);

    return TRUE;
}

EvolutionShellComponentClient *
e_uri_schema_registry_get_handler_for_schema (EUriSchemaRegistry *registry,
                          const char *schema)
{
    EUriSchemaRegistryPrivate *priv;
    const SchemaHandler *handler;

    g_return_val_if_fail (registry != NULL, NULL);
    g_return_val_if_fail (E_IS_URI_SCHEMA_REGISTRY (registry), NULL);
    g_return_val_if_fail (schema != NULL, NULL);

    priv = registry->priv;

    handler = g_hash_table_lookup (priv->schema_to_handler, schema);
    if (handler == NULL)
        return NULL;

    return handler->component;
}


E_MAKE_TYPE (e_uri_schema_registry, "EUriSchemaRegistry", EUriSchemaRegistry, class_init, init, PARENT_TYPE)