xmonad-config/lib/Xmobar/Plugins/Screensaver.hs

--------------------------------------------------------------------------------
-- Screensaver plugin
--
-- Use the custom DBus interface exported by the XMonad process so I can react
-- to signals spawned by commands

module Xmobar.Plugins.Screensaver
  ( Screensaver (..)
  , ssAlias
  )
where

import Data.Internal.DBus
import RIO
import qualified RIO.Text as T
import XMonad.Internal.DBus.Screensaver
import Xmobar
import Xmobar.Plugins.Common

newtype Screensaver = Screensaver (T.Text, Colors) deriving (Read, Show)

ssAlias :: T.Text
ssAlias = "screensaver"

instance Exec Screensaver where
  alias (Screensaver _) = T.unpack ssAlias
  start (Screensaver (text, colors)) cb =
    withDBusClientConnection
      cb
      (Just "org.xmobar.screensaver")
      (Just "screensaver.log")
      $ \cl -> withDIO cl $ do
        matchSignal dpy
        dpy =<< callQuery
    where
      dpy = displayMaybe cb $ return . (\s -> colorText colors s text)