Screensaver DBUS Listener

screensaver-dbu-listener.py

#!/usr/bin/env python2.7
# -*- coding: utf-8 -*-

from dbus.mainloop.glib import DBusGMainLoop

import dbus
import gobject
import logging

logging.basicConfig(
    format="%(asctime)-15s [%(levelname)-5s] - %(message)s", 
    datefmt="%Y/%m/%d %H:%M:%S",
    level=logging.INFO
)

logger = logging.getLogger('screensaver')

dbus_loop = DBusGMainLoop(set_as_default=True)

def message_callback(bus, message):    
    if message.get_interface() == "org.gnome.ScreenSaver":
        if message.get_member() == "ActiveChanged":
            screensaver_enabled = bool(message.get_args_list()[0])
            logger.info("Screensaver state changed. Active: %s", screensaver_enabled)

session = dbus.SessionBus(mainloop=dbus_loop)
session.add_match_string_non_blocking("interface='org.gnome.ScreenSaver'")

session.add_message_filter(message_callback)

logger.info("Starting up.")

loop = gobject.MainLoop()
loop.run()