libcscreensaver/service.py: fix xdg-screensaver suspend

The old c code called xlib's XResetScreenSaver when the
SimulateUserActivity dbus method was called, and xdg-screensaver
depends on this in Cinnamon to reset the screensaver timeout.

Author: itzexor

libcscreensaver/cs-screen-x11.c

@@ -627,6 +627,20 @@ cs_screen_get_mouse_monitor (CsScreen *screen)
     return ret;
 }
 
+/**
+ * cs_screen_reset_screensaver:
+ *
+ * Resets the screensaver idle timer. If called when the screensaver is active
+ * it will stop it.
+ *
+ */
+
+void
+cs_screen_reset_screensaver (void)
+{
+    XResetScreenSaver (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
+}
+
 void
 cs_screen_nuke_focus (void)
 {

libcscreensaver/cs-screen.h

@@ -64,6 +64,8 @@ gint                         cs_screen_get_n_monitors (CsScreen *screen);
 
 gint                         cs_screen_get_mouse_monitor (CsScreen *screen);
 
+void                         cs_screen_reset_screensaver (void);
+
 void                         cs_screen_nuke_focus (void);
 
 G_END_DECLS

src/service.py

@@ -131,6 +131,8 @@ def handle_get_active_time(self, iface, inv):
     def handle_simulate_user_activity(self, iface, inv):
         if self.manager.is_locked():
             self.manager.simulate_user_activity()
+        else:
+            CScreensaver.Screen.reset_screensaver()
 
         iface.complete_simulate_user_activity(inv)