Add dbus property for support check.

Author: mtwebster

plugins/power/csd-power-manager.c

@@ -3937,6 +3937,23 @@ iio_proxy_maybe_claim_light (CsdPowerManager *manager)
         iio_proxy_claim_light (manager, iio_proxy_should_claim_light (manager));
 }
 
+static void
+iio_proxy_update_ambient_light_supported (CsdPowerManager *manager)
+{
+        gboolean supported = FALSE;
+
+        if (manager->priv->iio_proxy != NULL) {
+                GVariant *val = g_dbus_proxy_get_cached_property (manager->priv->iio_proxy, "HasAmbientLight");
+                if (val != NULL) {
+                        supported = g_variant_get_boolean (val);
+                        g_variant_unref (val);
+                }
+        }
+
+        if (manager->priv->screen_iface != NULL)
+                csd_screen_set_ambient_light_supported (manager->priv->screen_iface, supported);
+}
+
 static void
 iio_proxy_appeared_cb (GDBusConnection *connection,
                        const gchar *name,
@@ -3953,6 +3970,7 @@ iio_proxy_appeared_cb (GDBusConnection *connection,
                                                "net.hadess.SensorProxy",
                                                NULL,
                                                NULL);
+        iio_proxy_update_ambient_light_supported (manager);
         iio_proxy_maybe_claim_light (manager);
 }
 
@@ -3963,6 +3981,7 @@ iio_proxy_vanished_cb (GDBusConnection *connection,
 {
         CsdPowerManager *manager = CSD_POWER_MANAGER (user_data);
         g_clear_object (&manager->priv->iio_proxy);
+        iio_proxy_update_ambient_light_supported (manager);
 }
 
 static void

plugins/power/org.cinnamon.SettingsDaemon.Power.Screen.xml

@@ -23,5 +23,7 @@
     </method>
     <signal name='Changed'>
     </signal>
+    <property name='AmbientLightSupported' type='b' access='read'>
+    </property>
   </interface>
 </node>