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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-categories-master-list.c: the master list of categories.
 *
 * Authors:
 *   Chris Lahey <clahey@ximian.com>
 *
 * (C) 1999, 2000 Ximian, Inc.
 */
#include <config.h>

#include "e-categories-master-list-wombat.h"
#include "e-categories-config.h"

#include <tree.h>
#include <parser.h>
#include <gal/util/e-i18n.h>
#include <gal/util/e-xml-utils.h>
#include <bonobo-conf/bonobo-config-database.h>
#include <bonobo/bonobo-moniker-util.h>
#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-listener.h>
#include <bonobo/bonobo-event-source.h>

#define PARENT_TYPE e_categories_master_list_array_get_type ()

#define d(x)

struct _ECategoriesMasterListWombatPriv {
    Bonobo_ConfigDatabase db;
    Bonobo_EventSource_ListenerId listener_id;
};

static ECategoriesMasterListArrayClass *parent_class;

static void
ecmlw_load (ECategoriesMasterListWombat *ecmlw)
{
    char *string;
    gboolean def;

    string = bonobo_config_get_string_with_default
        (ecmlw->priv->db,
         "General/CategoryMasterList",
         NULL,
         &def);

    /* parse the XML string */
    if (!def) {
        e_categories_master_list_array_from_string (E_CATEGORIES_MASTER_LIST_ARRAY (ecmlw),
                                string);
    }

    d(g_print ("load: %s\n", string?string:"(nil)"));

    g_free (string);
}

static void
ecmlw_save (ECategoriesMasterListWombat *ecmlw)
{
    char *string;
    CORBA_Environment ev;

    string = e_categories_master_list_array_to_string (E_CATEGORIES_MASTER_LIST_ARRAY (ecmlw));

    d(g_print ("save: %s\n", string));

    CORBA_exception_init (&ev);

    bonobo_config_set_string (ecmlw->priv->db,
                  "General/CategoryMasterList",
                  string,
                  &ev);

    CORBA_exception_free (&ev);

    g_free (string);
}

/**
 * ecmlw_commit:
 * @ecml: the master list to remove from.
 */
static void
ecmlw_commit (ECategoriesMasterList *ecml)
{
    ECategoriesMasterListWombat *ecmlw = E_CATEGORIES_MASTER_LIST_WOMBAT (ecml);

    ((ECategoriesMasterListClass *) parent_class)->commit (ecml);

    ecmlw_save (ecmlw);
}


/**
 * ecmlw_reset:
 * @ecml: the master list to reset.
 */
static void
ecmlw_reset (ECategoriesMasterList *ecml)
{
    ECategoriesMasterListWombat *ecmlw = E_CATEGORIES_MASTER_LIST_WOMBAT (ecml);

    ((ECategoriesMasterListClass *) parent_class)->reset (ecml);

    ecmlw_save (ecmlw);
}

static void
ecmlw_destroy (GtkObject *object)
{
    ECategoriesMasterListWombat *ecmlw = E_CATEGORIES_MASTER_LIST_WOMBAT (object);
    CORBA_Environment ev;

    CORBA_exception_init (&ev);

    /* remove the listener */

    bonobo_event_source_client_remove_listener (ecmlw->priv->db,
                            ecmlw->priv->listener_id,
                            &ev);
    bonobo_object_release_unref (ecmlw->priv->db, &ev);

    CORBA_exception_free (&ev);

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


static void
ecmlw_class_init (GtkObjectClass *object_class)
{
    ECategoriesMasterListClass *ecml_class = E_CATEGORIES_MASTER_LIST_CLASS(object_class);

    parent_class          = gtk_type_class (PARENT_TYPE);

    ecml_class->commit    = ecmlw_commit;

    ecml_class->reset     = ecmlw_reset ;

    object_class->destroy = ecmlw_destroy;
}

static void 
property_change_cb (BonoboListener    *listener,
            char              *event_name, 
            CORBA_any         *any,
            CORBA_Environment *ev,
            gpointer           user_data)
{
    ecmlw_load (user_data);
}

static void
ecmlw_init (ECategoriesMasterListWombat *ecmlw)
{
    CORBA_Environment ev;

    CORBA_exception_init (&ev);

    ecmlw->priv = g_new (ECategoriesMasterListWombatPriv, 1);
    ecmlw->priv->db = bonobo_get_object ("wombat:", "Bonobo/ConfigDatabase", &ev);

    /* add a listener */
    ecmlw->priv->listener_id =
        bonobo_event_source_client_add_listener (ecmlw->priv->db, property_change_cb,
                             NULL, &ev, ecmlw);
    if (BONOBO_EX (&ev)) {
        CORBA_exception_free (&ev);
        return;
    }

    CORBA_exception_free (&ev);

    ecmlw_load (ecmlw);
}

guint
e_categories_master_list_wombat_get_type (void)
{
    static guint type = 0;
    
    if (!type) {
        GtkTypeInfo info = {
            "ECategoriesMasterListWombat",
            sizeof (ECategoriesMasterListWombat),
            sizeof (ECategoriesMasterListWombatClass),
            (GtkClassInitFunc) ecmlw_class_init,
            (GtkObjectInitFunc) ecmlw_init,
            /* reserved_1 */ NULL,
            /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };

        type = gtk_type_unique (PARENT_TYPE, &info);
    }

    return type;
}

ECategoriesMasterList *
e_categories_master_list_wombat_new       (void)
{
    return E_CATEGORIES_MASTER_LIST (gtk_type_new (e_categories_master_list_wombat_get_type ()));
}