diff options
Diffstat (limited to 'src/lib/Xmobar/Plugins/BufferedPipeReader.hs')
-rw-r--r-- | src/lib/Xmobar/Plugins/BufferedPipeReader.hs | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/src/lib/Xmobar/Plugins/BufferedPipeReader.hs b/src/lib/Xmobar/Plugins/BufferedPipeReader.hs deleted file mode 100644 index 65ecea2..0000000 --- a/src/lib/Xmobar/Plugins/BufferedPipeReader.hs +++ /dev/null @@ -1,88 +0,0 @@ ------------------------------------------------------------------------------ --- | --- Module : Plugins.BufferedPipeReader --- Copyright : (c) Jochen Keil --- License : BSD-style (see LICENSE) --- --- Maintainer : Jochen Keil <jochen dot keil at gmail dot com> --- Stability : unstable --- Portability : unportable --- --- A plugin for reading (temporarily) from named pipes with reset --- ------------------------------------------------------------------------------ - -module Xmobar.Plugins.BufferedPipeReader(BufferedPipeReader(..)) where - -import Control.Monad(forM_, when, void) -import Control.Concurrent -import Control.Concurrent.STM -import System.IO -import System.IO.Unsafe(unsafePerformIO) - -import Xmobar.Utils(hGetLineSafe) -import Xmobar.Run.Commands -import Xmobar.System.Signal -import Xmobar.System.Environment - -data BufferedPipeReader = BufferedPipeReader String [(Int, Bool, String)] - deriving (Read, Show) - -{-# NOINLINE signal #-} -signal :: MVar SignalType -signal = unsafePerformIO newEmptyMVar - -instance Exec BufferedPipeReader where - alias ( BufferedPipeReader a _ ) = a - - trigger br@( BufferedPipeReader _ _ ) sh = - takeMVar signal >>= sh . Just >> trigger br sh - - start ( BufferedPipeReader _ ps ) cb = do - - (chan, str, rst) <- initV - forM_ ps $ \p -> forkIO $ reader p chan - writer chan str rst - - where - initV :: IO (TChan (Int, Bool, String), TVar (Maybe String), TVar Bool) - initV = atomically $ do - tc <- newTChan - ts <- newTVar Nothing - tb <- newTVar False - return (tc, ts, tb) - - reader :: (Int, Bool, FilePath) -> TChan (Int, Bool, String) -> IO () - reader p@(to, tg, fp) tc = do - fp' <- expandEnv fp - openFile fp' ReadWriteMode >>= hGetLineSafe >>= \dt -> - atomically $ writeTChan tc (to, tg, dt) - reader p tc - - writer :: TChan (Int, Bool, String) - -> TVar (Maybe String) -> TVar Bool -> IO () - writer tc ts otb = do - (to, tg, dt, ntb) <- update - cb dt - when tg $ putMVar signal $ Reveal 0 - when (to /= 0) $ sfork $ reset to tg ts ntb - writer tc ts ntb - - where - sfork :: IO () -> IO () - sfork f = void (forkIO f) - - update :: IO (Int, Bool, String, TVar Bool) - update = atomically $ do - (to, tg, dt) <- readTChan tc - when (to == 0) $ writeTVar ts $ Just dt - writeTVar otb False - tb <- newTVar True - return (to, tg, dt, tb) - - reset :: Int -> Bool -> TVar (Maybe String) -> TVar Bool -> IO () - reset to tg ts tb = do - threadDelay ( to * 100 * 1000 ) - readTVarIO tb >>= \b -> when b $ do - when tg $ putMVar signal $ Hide 0 - readTVarIO ts >>= maybe (return ()) cb |