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-- | 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           Xmobar

import           XMonad.Internal.DBus.Common
import           XMonad.Internal.DBus.Screensaver
import           Xmobar.Plugins.Common

newtype Screensaver = Screensaver (String, String, String) deriving (Read, Show)

ssAlias :: String
ssAlias = "screensaver"

instance Exec Screensaver where
  alias (Screensaver _) = ssAlias
  start (Screensaver (text, colorOn, colorOff)) cb = do
    withDBusClientConnection_ False $ \c -> do
      matchSignal (cb . fmtState) c
      cb . fmtState =<< callQuery c
    where
      fmtState = maybe "N/A" $ chooseColor text colorOn colorOff