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|
{-# LANGUAGE LambdaCase #-}
module Util.Shutdown
( sendShutdownEvent
, handleShutdownEvent
, shutdown
)
where
import Control.Monad
import Data.Monoid
import Data.Maybe (catMaybes)
import qualified Data.Map as Map
import System.Environment (getEnv)
import System.Exit (exitSuccess)
import XMonad
import qualified XMonad.StackSet as W
sendShutdownEvent :: IO ()
sendShutdownEvent = do
dpy <- openDisplay ""
rw <- rootWindow dpy $ defaultScreen dpy
a <- internAtom dpy "XMONAD_SHUTDOWN" False
allocaXEvent $ \e -> do
setEventType e clientMessage
setClientMessageEvent e rw a 32 0 currentTime
sendEvent dpy rw False structureNotifyMask e
sync dpy False
handleShutdownEvent :: Event -> X All
handleShutdownEvent = \case
ClientMessageEvent { ev_message_type = mt } -> do
c <- (mt ==) <$> getAtom "XMONAD_SHUTDOWN"
when c shutdown
return (All c)
_ ->
return (All True)
shutdown :: X ()
shutdown = do
broadcastMessage ReleaseResources
io . flush =<< asks display
let wsData = show . W.mapLayout show . windowset
maybeShow (t, Right (PersistentExtension ext)) = Just (t, show ext)
maybeShow (t, Left str) = Just (t, str)
maybeShow _ = Nothing
extState =
return . show . catMaybes . map maybeShow . Map.toList . extensibleState
s <- gets (\s -> (wsData s : extState s))
_ <- io $ do
path <- getEnv "XMONAD_STATE"
writeFile path (unlines s)
exitSuccess
return ()
|
