[gnome-settings-daemon] power: Don't react to light changes if not at console

[Bastien Nocera <hadess src gnome org>]

commit bc732cd6c7c7e22b0f8df7c6a4046b5303eff5eb
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Jan 10 17:57:47 2018 +0100

    power: Don't react to light changes if not at console
    
    As iio-sensor-proxy isn't yet clever enough to only send property
    changes signals to clients that have claimed a sensor, disconnect
    the properties-changed signal so we don't attempt to make brightness
    changes when we're not on the active seat.
    
    See https://github.com/hadess/iio-sensor-proxy/issues/210
    See https://bugzilla.gnome.org/show_bug.cgi?id=756539
    See https://bugzilla.gnome.org/show_bug.cgi?id=773685
    See https://bugzilla.gnome.org/show_bug.cgi?id=764896
    See https://bugzilla.redhat.com/show_bug.cgi?id=1322588
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792409

 plugins/power/gsd-power-manager.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/plugins/power/gsd-power-manager.c b/plugins/power/gsd-power-manager.c
index e411e12..19fa321 100644
--- a/plugins/power/gsd-power-manager.c
+++ b/plugins/power/gsd-power-manager.c
@@ -219,6 +219,7 @@ static gboolean  idle_is_session_inhibited (GsdPowerManager *manager, guint mask
 static void      idle_triggered_idle_cb (GnomeIdleMonitor *monitor, guint watch_id, gpointer user_data);
 static void      idle_became_active_cb (GnomeIdleMonitor *monitor, guint watch_id, gpointer user_data);
 static void      iio_proxy_changed (GsdPowerManager *manager);
+static void      iio_proxy_changed_cb (GDBusProxy *proxy, GVariant *changed_properties, GStrv 
invalidated_properties, gpointer user_data);
 
 G_DEFINE_TYPE (GsdPowerManager, gsd_power_manager, G_TYPE_OBJECT)
 
@@ -996,6 +997,18 @@ iio_proxy_claim_light (GsdPowerManager *manager, gboolean active)
        if (active && !manager->priv->session_is_active)
                return;
 
+        /* FIXME:
+         * Remove when iio-sensor-proxy sends events only to clients instead
+         * of all listeners:
+         * https://github.com/hadess/iio-sensor-proxy/issues/210 */
+        if (active)
+                g_signal_connect (manager->priv->iio_proxy, "g-properties-changed",
+                                  G_CALLBACK (iio_proxy_changed_cb), manager);
+        else
+                g_signal_handlers_disconnect_by_func (manager->priv->iio_proxy,
+                                                      G_CALLBACK (iio_proxy_changed_cb),
+                                                      manager);
+
         if (!g_dbus_proxy_call_sync (manager->priv->iio_proxy,
                                      active ? "ClaimLight" : "ReleaseLight",
                                      NULL,
@@ -2613,8 +2626,6 @@ iio_proxy_appeared_cb (GDBusConnection *connection,
                                                "net.hadess.SensorProxy",
                                                NULL,
                                                NULL);
-        g_signal_connect (manager->priv->iio_proxy, "g-properties-changed",
-                          G_CALLBACK (iio_proxy_changed_cb), manager);
         iio_proxy_claim_light (manager, TRUE);
 }