{-# LANGUAGE OverloadedStrings #-}

--------------------------------------------------------------------------------
-- | 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           RIO
import qualified RIO.Text                         as T

import           Xmobar

import           XMonad.Internal.DBus.Screensaver
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 = do
    withDBusClientConnection cb $ \sys -> liftIO $ do
      matchSignal dpy sys
      dpy =<< callQuery sys
    where
      dpy = displayMaybe cb $ return . (\s -> colorText colors s text)