/* GNOME calendar object
*
* Copyright (C) 2000 Helix Code, Inc.
*
* Author: Federico Mena-Quintero <federico@helixcode.com>
*
* 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.
*/
#include <config.h>
#include "cal.h"
/* Private part of the Cal structure */
typedef struct {
/* The URI where this calendar is stored */
char *uri;
/* List of listeners for this calendar */
GList *listeners;
} CalPrivate;
static void cal_class_init (CalClass *class);
static void cal_init (Cal *cal);
static void cal_destroy (GtkObject *object);
static POA_GNOME_Calendar_Cal__vepv cal_vepv;
static GnomeObjectClass *parent_class;
/**
* cal_get_type:
* @void:
*
* Registers the #Cal class if necessary, and returns the type ID associated to
* it.
*
* Return value: The type ID of the #Cal class.
**/
GtkType
cal_get_type (void)
{
static GtkType cal_type = 0;
if (!cal_type) {
static const GtkTypeInfo cal_info = {
"Cal",
sizeof (Cal),
sizeof (CalClass),
(GtkClassInitFunc) cal_class_init,
(GtkObjectInitFunc) cal_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
cal_type = gtk_type_unique (gnome_object_get_type (), &cal_info);
}
return cal_type;
}
/* CORBA class initialzation function for the calendar */
static void
init_cal_corba_class (void)
{
cal_vepv.GNOME_Unknown_epv = gnome_object_get_epv ();
cal_vepv.GNOME_Calendar_Cal_epv = cal_get_epv ();
}
/* Class initialization function for the calendar */
static void
cal_class_init (CalClass *class)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass *) class;
parent_class = gtk_type_class (gnome_object_get_type ());
object_class->destroy = cal_destroy;
init_cal_corba_class ();
}
/* Object initialization function for the calendar */
static void
cal_init (Cal *cal)
{
CalPrivate *priv;
priv = g_new0 (CalPrivate, 1);
cal->priv = priv;
}
/* Destroy handler for the calendar */
static void
cal_destroy (GtkObject *object)
{
Cal *cal;
CalPrivate *priv;
GList *l;
CORBA_Environment *ev;
g_return_if_fail (object != NULL);
g_return_if_fail (IS_CAL (object));
cal = CAL (object);
priv = cal->priv;
if (priv->uri)
g_free (priv->uri);
CORBA_exception_init (&ev);
for (l = priv->listeners; l; l = l->next)
CORBA_Object_release (l->data, &ev);
g_list_free (priv->listeners);
g_free (priv);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
/* CORBA servant implementation */
/* Cal::get_uri method */
static CORBA_char *
Cal_get_uri (PortableServer_Servant servant,
CORBA_Environment *ev)
{
Cal *cal;
CalPrivate *priv;
cal = CAL (gnome_object_from_servant (servant));
priv = cal->priv;
return CORBA_string_dup (priv->uri);
}
/* Cal::add_listener method */
static void
Cal_add_listener (PortableServer_Servant servant,
GNOME_Calendar_Listener listener,
CORBA_Environment *ev)
{
Cal *cal;
cal = CAL (gnome_object_from_servant (servant));
cal_add_listener (cal, listener);
}
/* Cal::remove_listener method */
static void
Cal_remove_listener (PortableServer_Servant servant,
GNOME_Calendar_Listener listener,
CORBA_Environment *ev)
{
Cal *cal;
cal = CAL (gnome_object_from_servant (servant));
cal_remove_listener (cal, listener);
}
/**
* cal_get_epv:
* @void:
*
* Creates an EPV for the Cal CORBA class.
*
* Return value: A newly-allocated EPV.
**/
POA_GNOME_Calendar_Cal__epv *
cal_get_epv (void)
{
POA_GNOME_Calendar_Cal__epv *epv;
epv = g_new0 (POA_GNOME_Calendar_Cal__epv, 1);
epv->get_uri = Cal_get_uri;
epv->add_listener = Cal_add_listener;
epv->remove_listener = Cal_remove_listener;
return epv;
}
/* Returns whether a CORBA object is nil */
static gboolean
corba_object_is_nil (CORBA_Object object)
{
CORBA_Environment ev;
gboolean retval;
CORBA_exception_init (&ev);
retval = CORBA_Object_is_nil (object, &ev);
CORBA_exception_free (&ev);
return retval;
}
/**
* cal_construct:
* @cal: A calendar.
* @corba_cal: CORBA object for the calendar.
*
* Constructs a calendar by binding the corresponding CORBA object to it.
*
* Return value: The same object as the @cal argument.
**/
Cal *
cal_construct (Cal *cal, GNOME_Calendar_Cal corba_cal)
{
g_return_val_if_fail (cal != NULL, NULL);
g_return_val_if_fail (IS_CAL (cal), NULL);
g_return_val_if_fail (!corba_object_is_nil (corba_cal), NULL);
gnome_object_construct (GNOME_OBJECT (cal), corba_cal);
return cal;
}
/**
* cal_corba_object_create:
* @object: #GnomeObject that will wrap the CORBA object.
*
* Creates and activates the CORBA object that is wrapped by the specified
* calendar @object.
*
* Return value: An activated object reference or #CORBA_OBJECT_NIL in case of
* failure.
**/
GNOME_Calendar_Cal
cal_corba_object_create (GnomeObject *object)
{
POA_GNOME_Calendar_Cal *servant;
CORBA_Environment ev;
g_return_val_if_fail (object != NULL, CORBA_OBJECT_NIL);
g_return_val_if_fail (IS_CAL (object), CORBA_OBJECT_NIL);
servant = (POA_GNOME_Calendar_Cal *) g_new0 (GnomeObjectServant, 1);
servant->vepv = &cal_vepv;
CORBA_exception_init (&ev);
POA_GNOME_Calendar_Cal__init ((PortableServer_Servant) servant, &ev);
if (ev._major != CORBA_NO_EXCEPTION) {
g_free (servant);
CORBA_exception_free (&ev);
return CORBA_OBJECT_NIL;
}
CORBA_exception_free (&ev);
return (GNOME_Calendar_Cal) gnome_object_activate_servant (object, servant);
}
/**
* cal_add_listener:
* @cal: A calendar.
* @listener: A listener.
*
* Adds a listener for changes to a calendar. The specified listener object
* will be used for notification when objects are added, removed, or changed in
* the calendar.
**/
void
cal_add_listener (Cal *cal, GNOME_Calendar_Listener listener)
{
CalPrivate *priv;
CORBA_Environment ev;
g_return_if_fail (cal != NULL);
g_return_if_fail (IS_CAL (cal));
g_return_if_fail (!corba_object_is_nil (listener));
priv = cal->priv;
CORBA_exception_init (&ev);
GNOME_Unknown_ref (listener, &ev);
priv->listeners = g_list_prepend (priv->listeners, CORBA_Object_duplicate (listener, &ev));
CORBA_exception_free (&ev);
}
/**
* cal_remove_listener:
* @cal: A calendar.
* @listener: A listener.
*
* Removes a listener from a calendar so that no more notification events will
* be sent to the listener.
**/
void
cal_remove_listener (Cal *cal, GNOME_Calendar_Listener listener)
{
CalPrivate *priv;
CORBA_Environment ev;
GList *l;
g_return_if_fail (cal != NULL);
g_return_if_fail (IS_CAL (cal));
priv = cal->priv;
CORBA_exception_init (&ev);
/* FIXME: CORBA_Object_is_equivalent() is not what one thinks. This
* code could fail in situtations subtle enough that I don't understand
* them. Someone has to figure out the standard CORBA idiom for
* listeners or notification.
*/
for (l = priv->listeners; l; l = l->next)
if (CORBA_Object_is_equivalent (listener, l->data)) {
GNOME_Unknown_unref (listener, &ev);
priv->listeners = g_list_remove_link (priv->listeners, l);
g_list_free_1 (l);
break;
}
CORBA_exception_free (&ev);
}
