/* GNOME calendar listener
*
* 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-listener.h"
/* Private part of the CalListener structure */
typedef struct {
/* The calendar this listener refers to */
GNOME_Calendar_Cal cal;
} CalListenerPrivate;
/* Signal IDs */
enum {
CAL_LOADED,
OBJ_ADDED,
OBJ_REMOVED,
OBJ_CHANGED,
LAST_SIGNAL
};
static void cal_listener_class_init (CalListenerClass *class);
static void cal_listener_init (CalListener *listener);
static void cal_listener_destroy (GtkObject *object);
static POA_GNOME_Calendar_Listener__vepv cal_listener_vepv;
static guint cal_listener_signals[LAST_SIGNAL];
static GnomeObjectClass *parent_class;
/**
* cal_listener_get_type:
* @void:
*
* Registers the #CalListener class if necessary, and returns the type ID
* associated to it.
*
* Return value: The type ID of the #CalListener class.
**/
GtkType
cal_listener_get_type (void)
{
static GtkType cal_listener_type = 0;
if (!cal_listener_type) {
static const GtkTypeInfo cal_listener_info = {
"CalListener",
sizeof (CalListener),
sizeof (CalListenerClass),
(GtkClassInitFunc) cal_listener_class_init,
(GtkObjectInitFunc) cal_listener_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
cal_listener_type = gtk_type_unique (gnome_object_get_type (), &cal_listener_info);
}
return cal_listener_type;
}
/* CORBA class initialization function for the calendar listener */
static void
init_cal_listener_corba_class (void)
{
cal_listener_vepv.GNOME_Unknown_epv = gnome_object_get_epv ();
cal_listener_vepv.GNOME_Calendar_Listener_epv = cal_listener_get_epv ();
}
/* Class initialization function for the calendar listener */
static void
cal_listener_class_init (CalListenerClass *class)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass *) class;
parent_class = gtk_type_class (gnome_object_get_type ());
cal_listener_signals[CAL_LOADED] =
gtk_signal_new ("cal_loaded",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (CalListenerClass, cal_loaded),
gtk_marshal_NONE__POINTER,
GTK_TYPE_NONE, 1,
GTK_TYPE_POINTER);
cal_listener_signals[OBJ_ADDED] =
gtk_signal_new ("obj_added",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (CalListenerClass, obj_added),
gtk_marshal_NONE__POINTER,
GTK_TYPE_NONE, 1,
GTK_TYPE_POINTER);
cal_listener_signals[OBJ_REMOVED] =
gtk_signal_new ("obj_removed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (CalListenerClass, obj_removed),
gtk_marshal_NONE__POINTER,
GTK_TYPE_NONE, 1,
GTK_TYPE_POINTER);
cal_listener_signals[OBJ_CHANGED] =
gtk_signal_new ("obj_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (CalListenerClass, obj_changed),
gtk_marshal_NONE__POINTER,
GTK_TYPE_NONE, 1,
GTK_TYPE_POINTER);
gtk_object_class_add_signals (object_class, cal_listener_signals, LAST_SIGNAL);
object_class->destroy = cal_listener_destroy;
init_cal_listener_corba_class ();
}
/* Object initialization function for the calendar listener */
static void
cal_listener_init (CalListener *listener)
{
CalListenerPrivate *priv;
priv = g_new0 (CalListenerPrivate, 1);
listener->priv = priv;
priv->cal = CORBA_OBJECT_NIL;
}
/* 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;
}
/* Destroy handler for the calendar listener */
static void
cal_listener_destroy (GtkObject *object)
{
CalListener *listener;
CalListenerPrivate *priv;
CORBA_Environment ev;
g_return_if_fail (object != NULL);
g_return_if_fail (IS_CAL_LISTENER (object));
listener = CAL_LISTENER (object);
priv = listener->priv;
CORBA_exception_init (&ev);
if (!CORBA_Object_is_nil (priv->cal, &ev)) {
GNOME_Unknown_unref (priv->cal, &ev);
CORBA_Object_release (priv->cal, &ev);
}
g_free (priv);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
/* CORBA servant implementation */
/* Listener::cal_loaded method */
static void
Listener_cal_loaded (PortableServer_Servant servant,
GNOME_Calendar_Cal cal,
CORBA_Environment *ev)
{
CalListener *listener;
CalListenerPrivate *priv;
listener = CAL_LISTENER (gnome_object_from_servant (servant));
priv = listener->priv;
priv->cal = CORBA_Object_duplicate (cal, ev);
GNOME_Unknown_ref (priv->cal);
gtk_signal_emit (GTK_OBJECT (listener), cal_listener_signals[CAL_LOADED],
cal);
}
/* Listener::obj_added method */
static void
Listener_obj_added (PortableServer_Servant servant,
GNOME_Calendar_CalObj calobj,
CORBA_Environment *ev)
{
CalListener *listener;
listener = CAL_LISTENER (gnome_object_from_servant (servant));
gtk_signal_emit (GTK_OBJECT (listener), cal_listener_signals[OBJ_ADDED],
calobj);
}
/* Listener::obj_removed method */
static void
Listener_obj_removed (PortableServer_Servant servant,
GNOME_Calendar_CalObjUID uid,
CORBA_Environment *ev)
{
CalListener *listener;
listener = CAL_LISTENER (gnome_object_from_servant (servant));
gtk_signal_emit (GTK_OBJECT (listener), cal_listener_signals[OBJ_REMOVED],
uid);
}
/* Listener::obj_changed method */
static void
Listener_obj_changed (PortableServer_Servant servant,
GNOME_Calendar_CalObj calobj,
CORBA_Environment *ev)
{
CalListener *listener;
listener = CAL_LISTENER (gnome_object_from_servant (servant));
gtk_signal_emit (GTK_OBJECT (listener), cal_listener_signals[OBJ_CHANGED],
calobj);
}
/**
* cal_listener_get_epv:
* @void:
*
* Creates an EPV for the Listener CORBA class.
*
* Return value: A newly-allocated EPV.
**/
POA_GNOME_Calendar_Listener__epv *
cal_listener_get_epv (void)
{
POA_GNOME_Calendar_Listener__epv *epv;
epv = g_new0 (POA_GNOME_Calendar_Listener__epv, 1);
epv->cal_loaded = Listener_cal_loaded;
epv->obj_added = Listener_obj_added;
epv->obj_removed = Listener_obj_removed;
epv->obj_changed = Listener_obj_changed;
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_listener_construct:
* @listener: A calendar listener.
* @corba_listener: CORBA object for the calendar listener.
*
* Constructs a calendar listener by binding the corresponding CORBA object to
* it.
*
* Return value: the same object as the @listener argument.
**/
CalListener *
cal_listener_construct (CalListener *listener, GNOME_Calendar_Listener corba_listener)
{
g_return_val_if_fail (listener != NULL, NULL);
g_return_val_if_fail (IS_CAL_LISTENER (listener), NULL);
g_return_val_if_fail (!corba_object_is_nil (corba_listener), NULL);
gnome_object_construct (GNOME_OBJECT (listener), corba_listener);
return listener;
}
/**
* cal_listener_corba_object_create:
* @object: #GnomeObject that will wrap the CORBA object.
*
* Creates and activates the CORBA object that is wrapped by the specified
* calendar listener @object.
*
* Return value: An activated object reference or #CORBA_OBJECT_NIL in case of
* failure.
**/
GNOME_Calendar_Listener
cal_listener_corba_object_create (GnomeObject *object)
{
POA_GNOME_Calendar_Listener *servant;
CORBA_Environment ev;
g_return_val_if_fail (object != NULL, CORBA_OBJECT_NIL);
g_return_val_if_fail (IS_CAL_LISTENER (object), CORBA_OBJECT_NIL);
servant = (POA_GNOME_Calendar_Listener *) g_new0 (GnomeObjectServant, 1);
servant->vepv = &cal_listener_vepv;
CORBA_exception_init (&ev);
POA_GNOME_Calendar_Listener__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_Listener) gnome_object_activate_servant (object, servant);
}
/**
* cal_listener_new:
* @void:
*
* Creates a new #CalListener object.
*
* Return value: A newly-created #CalListener, or NULL if its corresponding
* CORBA object could not be created.
**/
CalListener *
cal_listener_new (void)
{
CalListener *listener;
GNOME_Calendar_Listener corba_listener;
listener = gtk_type_new (CAL_LISTENER_TYPE);
corba_listener = cal_listener_corba_object_create (GNOME_OBJECT (listener));
if (corba_object_is_nil (corba_listener)) {
gtk_object_destroy (listener);
return NULL;
}
return cal_listener_construct (listener, corba_listener);
}
/**
* cal_listener_get_calendar:
* @listener: A calendar listener.
*
* Queries the calendar that a listener is watching.
*
* Return value: The calendar that the listener is watching.
**/
GNOME_Calendar_Cal
cal_listener_get_calendar (CalListener *listener)
{
CalListenerPrivate *priv;
g_return_val_if_fail (listener != NULL, CORBA_OBJECT_NIL);
g_return_val_if_fail (IS_CAL_LISTENER (listener), CORBA_OBJECT_NIL);
priv = listener->priv;
return priv->cal;
}
