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/*
* Copyright (C) 2010-2011 Robert Ancell.
* Author: Robert Ancell <robert.ancell@canonical.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 3 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include "display-manager.h"
#include "configuration.h"
#include "seat-local.h"
#include "seat-xremote.h"
#include "seat-unity.h"
#include "plymouth.h"
enum {
SEAT_ADDED,
SEAT_REMOVED,
STOPPED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
struct DisplayManagerPrivate
{
/* The seats available */
GList *seats;
/* TRUE if stopping the display manager (waiting for seats to stop) */
gboolean stopping;
/* TRUE if stopped */
gboolean stopped;
};
G_DEFINE_TYPE (DisplayManager, display_manager, G_TYPE_OBJECT);
DisplayManager *
display_manager_new (void)
{
return g_object_new (DISPLAY_MANAGER_TYPE, NULL);
}
GList *
display_manager_get_seats (DisplayManager *manager)
{
return manager->priv->seats;
}
Seat *
display_manager_get_seat (DisplayManager *manager, const gchar *name)
{
GList *link;
for (link = manager->priv->seats; link; link = link->next)
{
Seat *seat = link->data;
if (strcmp (seat_get_name (seat), name) == 0)
return seat;
}
return NULL;
}
static void
check_stopped (DisplayManager *manager)
{
if (manager->priv->stopping &&
!manager->priv->stopped &&
g_list_length (manager->priv->seats) == 0)
{
manager->priv->stopped = TRUE;
g_debug ("Display manager stopped");
g_signal_emit (manager, signals[STOPPED], 0);
}
}
static void
seat_stopped_cb (Seat *seat, DisplayManager *manager)
{
manager->priv->seats = g_list_remove (manager->priv->seats, seat);
g_signal_handlers_disconnect_matched (seat, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, manager);
if (!manager->priv->stopping)
g_signal_emit (manager, signals[SEAT_REMOVED], 0, seat);
g_object_unref (seat);
check_stopped (manager);
}
gboolean
display_manager_add_seat (DisplayManager *manager, Seat *seat)
{
gboolean result;
g_return_val_if_fail (!manager->priv->stopping, FALSE);
result = seat_start (SEAT (seat));
if (!result)
return FALSE;
manager->priv->seats = g_list_append (manager->priv->seats, g_object_ref (seat));
g_signal_connect (seat, SEAT_SIGNAL_STOPPED, G_CALLBACK (seat_stopped_cb), manager);
g_signal_emit (manager, signals[SEAT_ADDED], 0, seat);
return TRUE;
}
void
display_manager_start (DisplayManager *manager)
{
g_return_if_fail (manager != NULL);
/* Disable Plymouth if no X servers are replacing it */
if (plymouth_get_is_active ())
{
g_debug ("Stopping Plymouth, no displays replace it");
plymouth_quit (FALSE);
}
}
void
display_manager_stop (DisplayManager *manager)
{
GList *seats, *link;
g_return_if_fail (manager != NULL);
if (manager->priv->stopping)
return;
g_debug ("Stopping display manager");
manager->priv->stopping = TRUE;
/* Stop all the seats. Copy the list as it might be modified if a seat stops during this loop */
seats = g_list_copy (manager->priv->seats);
for (link = seats; link; link = link->next)
{
Seat *seat = link->data;
seat_stop (seat);
}
g_list_free (seats);
check_stopped (manager);
}
static void
display_manager_init (DisplayManager *manager)
{
manager->priv = G_TYPE_INSTANCE_GET_PRIVATE (manager, DISPLAY_MANAGER_TYPE, DisplayManagerPrivate);
/* Load the seat modules */
seat_register_module ("local", SEAT_LOCAL_TYPE);
seat_register_module ("xremote", SEAT_XREMOTE_TYPE);
seat_register_module ("unity", SEAT_UNITY_TYPE);
}
static void
display_manager_finalize (GObject *object)
{
DisplayManager *self = DISPLAY_MANAGER (object);
GList *link;
for (link = self->priv->seats; link; link = link->next)
{
Seat *seat = link->data;
g_signal_handlers_disconnect_matched (seat, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
}
g_list_free_full (self->priv->seats, g_object_unref);
G_OBJECT_CLASS (display_manager_parent_class)->finalize (object);
}
static void
display_manager_class_init (DisplayManagerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = display_manager_finalize;
g_type_class_add_private (klass, sizeof (DisplayManagerPrivate));
signals[SEAT_ADDED] =
g_signal_new (DISPLAY_MANAGER_SIGNAL_SEAT_ADDED,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (DisplayManagerClass, seat_added),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, SEAT_TYPE);
signals[SEAT_REMOVED] =
g_signal_new (DISPLAY_MANAGER_SIGNAL_SEAT_REMOVED,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (DisplayManagerClass, seat_removed),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, SEAT_TYPE);
signals[STOPPED] =
g_signal_new (DISPLAY_MANAGER_SIGNAL_STOPPED,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (DisplayManagerClass, stopped),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
}
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