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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Component listener.
*
* Author:
* Rodrigo Moya <rodrigo@ximian.com>
*
* Copyright 2002, Ximian, Inc.
*/
#include <gtk/gtksignal.h>
#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-object.h>
#include <gal/util/e-util.h>
#include "e-component-listener.h"
#include <libgnome/gnome-i18n.h>
#define PARENT_TYPE GTK_TYPE_OBJECT
#define DEFAULT_PING_DELAY 10000
struct _EComponentListenerPrivate {
Bonobo_Unknown component;
int ping_delay;
int ping_timeout_id;
};
static void e_component_listener_class_init (EComponentListenerClass *klass);
static void e_component_listener_init (EComponentListener *cl);
static void e_component_listener_destroy (GtkObject *object);
static GtkObjectClass *parent_class = NULL;
enum {
COMPONENT_DIED,
LAST_SIGNAL
};
static guint comp_listener_signals[LAST_SIGNAL];
static void
e_component_listener_class_init (EComponentListenerClass *klass)
{
GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
parent_class = gtk_type_class (PARENT_TYPE);
object_class->destroy = e_component_listener_destroy;
klass->component_died = NULL;
comp_listener_signals[COMPONENT_DIED] =
gtk_signal_new ("component_died",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (EComponentListenerClass, component_died),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, comp_listener_signals, LAST_SIGNAL);
}
static void
e_component_listener_init (EComponentListener *cl)
{
/* allocate internal structure */
cl->priv = g_new (EComponentListenerPrivate, 1);
cl->priv->component = CORBA_OBJECT_NIL;
cl->priv->ping_delay = DEFAULT_PING_DELAY;
cl->priv->ping_timeout_id = -1;
}
static void
e_component_listener_destroy (GtkObject *object)
{
EComponentListener *cl = (EComponentListener *) object;
g_return_if_fail (E_IS_COMPONENT_LISTENER (cl));
cl->priv->component = CORBA_OBJECT_NIL;
if (cl->priv->ping_timeout_id != -1) {
g_source_remove (cl->priv->ping_timeout_id);
cl->priv->ping_timeout_id = -1;
}
/* free memory */
g_free (cl->priv);
cl->priv = NULL;
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
GtkType
e_component_listener_get_type (void)
{
static GtkType type = 0;
if (!type) {
static const GtkTypeInfo info = {
"EComponentListener",
sizeof (EComponentListener),
sizeof (EComponentListenerClass),
(GtkClassInitFunc) e_component_listener_class_init,
(GtkObjectInitFunc) e_component_listener_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
type = gtk_type_unique (PARENT_TYPE, &info);
}
return type;
}
static gboolean
ping_component_callback (gpointer user_data)
{
gboolean alive;
int is_nil;
CORBA_Environment ev;
EComponentListener *cl = (EComponentListener *) user_data;
g_return_val_if_fail (E_IS_COMPONENT_LISTENER (cl), FALSE);
if (cl->priv->component == CORBA_OBJECT_NIL)
return FALSE;
CORBA_exception_init (&ev);
is_nil = CORBA_Object_is_nil (cl->priv->component, &ev);
if (BONOBO_EX (&ev)) {
g_message (_("ping_timeout_callback: could not determine if the "
"CORBA object is nil or not"));
goto out;
}
CORBA_exception_free (&ev);
if (is_nil)
goto out;
alive = bonobo_unknown_ping (cl->priv->component);
if (alive)
return TRUE;
out:
/* the component has died, so we notify and close the timeout */
gtk_signal_emit (GTK_OBJECT (cl), comp_listener_signals[COMPONENT_DIED]);
cl->priv->component = CORBA_OBJECT_NIL;
cl->priv->ping_timeout_id = -1;
return FALSE;
}
static void
setup_ping_timeout (EComponentListener *cl)
{
if (cl->priv->ping_timeout_id != -1)
g_source_remove (cl->priv->ping_timeout_id);
cl->priv->ping_timeout_id = g_timeout_add (cl->priv->ping_delay,
ping_component_callback,
cl);
}
/**
* e_component_listener_new
* @comp: Component to listen for.
* @ping_delay: Delay (in ms) for pinging the component.
*
* Create a new #EComponentListener object, which allows to listen
* for a given component and get notified when that component dies.
*
* Returns: a component listener object.
*/
EComponentListener *
e_component_listener_new (Bonobo_Unknown comp, int ping_delay)
{
EComponentListener *cl;
cl = gtk_type_new (E_COMPONENT_LISTENER_TYPE);
cl->priv->component = comp;
/* set up the timeout function */
cl->priv->ping_delay = ping_delay > 0 ? ping_delay : DEFAULT_PING_DELAY;
setup_ping_timeout (cl);
return cl;
}
/**
* e_component_listener_get_ping_delay
* @cl: A #EComponentListener object.
*
* Get the ping delay being used to listen for an object.
*/
int
e_component_listener_get_ping_delay (EComponentListener *cl)
{
g_return_val_if_fail (E_IS_COMPONENT_LISTENER (cl), -1);
return cl->priv->ping_delay;
}
void
e_component_listener_set_ping_delay (EComponentListener *cl, int ping_delay)
{
g_return_if_fail (E_IS_COMPONENT_LISTENER (cl));
g_return_if_fail (ping_delay > 0);
cl->priv->ping_delay = ping_delay;
setup_ping_timeout (cl);
}
Bonobo_Unknown
e_component_listener_get_component (EComponentListener *cl)
{
g_return_val_if_fail (E_IS_COMPONENT_LISTENER (cl), CORBA_OBJECT_NIL);
return cl->priv->component;
}
void
e_component_listener_set_component (EComponentListener *cl, Bonobo_Unknown comp)
{
g_return_if_fail (E_IS_COMPONENT_LISTENER (cl));
cl->priv->component = comp;
setup_ping_timeout (cl);
}
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