[mutter] backends/native: Reset idle time when resuming from suspend

[Rui Matos <rtcm src gnome org>]

commit b62db404ee33c68f2524c931051f06b980c3b5f0
Author: Rui Matos <tiagomatos gmail com>
Date:   Wed May 27 20:10:51 2015 +0200

    backends/native: Reset idle time when resuming from suspend
    
    https://bugzilla.gnome.org/show_bug.cgi?id=749994

 src/backends/native/meta-backend-native.c |   56 +++++++++++++++++++++++++++++
 1 files changed, 56 insertions(+), 0 deletions(-)
---
diff --git a/src/backends/native/meta-backend-native.c b/src/backends/native/meta-backend-native.c
index a14bd4c..e1d66c1 100644
--- a/src/backends/native/meta-backend-native.c
+++ b/src/backends/native/meta-backend-native.c
@@ -42,6 +42,9 @@ struct _MetaBackendNativePrivate
   MetaLauncher *launcher;
   MetaBarrierManagerNative *barrier_manager;
   UpClient *up_client;
+  guint sleep_signal_id;
+  GCancellable *cancellable;
+  GDBusConnection *system_bus;
 };
 typedef struct _MetaBackendNativePrivate MetaBackendNativePrivate;
 
@@ -56,11 +59,58 @@ meta_backend_native_finalize (GObject *object)
   meta_launcher_free (priv->launcher);
 
   g_object_unref (priv->up_client);
+  if (priv->sleep_signal_id)
+    g_dbus_connection_signal_unsubscribe (priv->system_bus, priv->sleep_signal_id);
+  g_cancellable_cancel (priv->cancellable);
+  g_clear_object (&priv->cancellable);
+  g_clear_object (&priv->system_bus);
 
   G_OBJECT_CLASS (meta_backend_native_parent_class)->finalize (object);
 }
 
 static void
+prepare_for_sleep_cb (GDBusConnection *connection,
+                      const gchar     *sender_name,
+                      const gchar     *object_path,
+                      const gchar     *interface_name,
+                      const gchar     *signal_name,
+                      GVariant        *parameters,
+                      gpointer         user_data)
+{
+  gboolean suspending;
+  g_variant_get (parameters, "(b)", &suspending);
+  if (suspending)
+    return;
+  meta_idle_monitor_native_reset_idletime (meta_idle_monitor_get_core ());
+}
+
+static void
+system_bus_gotten_cb (GObject      *object,
+                      GAsyncResult *res,
+                      gpointer      user_data)
+{
+  MetaBackendNativePrivate *priv;
+  GDBusConnection *bus;
+
+  bus = g_bus_get_finish (res, NULL);
+  if (!bus)
+    return;
+
+  priv = meta_backend_native_get_instance_private (META_BACKEND_NATIVE (user_data));
+  priv->system_bus = bus;
+  priv->sleep_signal_id = g_dbus_connection_signal_subscribe (priv->system_bus,
+                                                              "org.freedesktop.login1",
+                                                              "org.freedesktop.login1.Manager",
+                                                              "PrepareForSleep",
+                                                              "/org/freedesktop/login1",
+                                                              NULL,
+                                                              G_DBUS_SIGNAL_FLAGS_NONE,
+                                                              prepare_for_sleep_cb,
+                                                              NULL,
+                                                              NULL);
+}
+
+static void
 lid_is_closed_changed_cb (UpClient   *client,
                           GParamSpec *pspec,
                           gpointer    user_data)
@@ -286,6 +336,12 @@ meta_backend_native_init (MetaBackendNative *native)
   priv->up_client = up_client_new ();
   g_signal_connect (priv->up_client, "notify::lid-is-closed",
                     G_CALLBACK (lid_is_closed_changed_cb), NULL);
+
+  priv->cancellable = g_cancellable_new ();
+  g_bus_get (G_BUS_TYPE_SYSTEM,
+             priv->cancellable,
+             system_bus_gotten_cb,
+             native);
 }
 
 gboolean