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-- Copyright Spencer Janssen <spencerjanssen@gmail.com>
-- Tomas Janousek <tomi@nomi.cz>
-- BSD3 (see LICENSE)
--
-- Reads from standard input and writes to an X propery on root window.
-- To be used with XPropertyLog:
-- Add it to commands:
-- Run XPropertyLog "_XMONAD_LOG_CUSTOM"
-- Add it to the template:
-- template = "... %_XMONAD_LOG_CUSTOM% ..."
-- Run:
-- $ blah blah | xmonadpropwrite _XMONAD_LOG_CUSTOM
import Control.Monad
import Graphics.X11
import Graphics.X11.Xlib.Extras
import qualified Data.ByteString as B
import Foreign.C (CChar)
import System.IO
import System.Environment
main = do
atom <- flip fmap getArgs $ \args -> case args of
[a] -> a
_ -> "_XMONAD_LOG"
d <- openDisplay ""
xlog <- internAtom d atom False
ustring <- internAtom d "UTF8_STRING" False
root <- rootWindow d (defaultScreen d)
forever $ do
msg <- B.getLine
changeProperty8 d root xlog ustring propModeReplace (encodeCChar msg)
sync d True
return ()
encodeCChar :: B.ByteString -> [CChar]
encodeCChar = map fromIntegral . B.unpack
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