module Xmobar.Plugins.Locks(Locks(..)) where
import Graphics.X11
import Data.List
import Data.Bits
import Control.Monad
import Graphics.X11.Xlib.Extras
import Xmobar.Run.Commands
import Xmobar.System.Kbd
import Xmobar.X11.Events (nextEvent')
data Locks = Locks
deriving (Read, Show)
locks :: [ ( KeySym, String )]
locks = [ ( xK_Caps_Lock, "CAPS" )
, ( xK_Num_Lock, "NUM" )
, ( xK_Scroll_Lock, "SCROLL" )
]
run' :: Display -> Window -> IO String
run' d root = do
modMap <- getModifierMapping d
( _, _, _, _, _, _, _, m ) <- queryPointer d root
ls <- filterM ( \( ks, _ ) -> do
kc <- keysymToKeycode d ks
return $ case find (elem kc . snd) modMap of
Nothing -> False
Just ( i, _ ) -> testBit m (fromIntegral i)
) locks
return $ unwords $ map snd ls
instance Exec Locks where
alias Locks = "locks"
start Locks cb = do
d <- openDisplay ""
root <- rootWindow d (defaultScreen d)
_ <- xkbSelectEventDetails d xkbUseCoreKbd xkbIndicatorStateNotify m m
allocaXEvent $ \ep -> forever $ do
cb =<< run' d root
nextEvent' d ep
getEvent ep
closeDisplay d
return ()
where
m = xkbAllStateComponentsMask