module Xmobar.Text.Loop (textLoop) where
import Prelude hiding (lookup)
import System.IO (hSetBuffering, stdin, stdout, BufferMode(LineBuffering))
import Control.Concurrent.STM
import Xmobar.System.Signal
import Xmobar.Config.Types (Config)
import Xmobar.Run.Loop (loop)
import Xmobar.Text.Output (initLoop, format)
textLoop :: Config -> IO ()
textLoop :: Config -> IO ()
textLoop Config
conf = do
Handle -> BufferMode -> IO ()
hSetBuffering Handle
stdin BufferMode
LineBuffering
Handle -> BufferMode -> IO ()
hSetBuffering Handle
stdout BufferMode
LineBuffering
Config -> IO ()
initLoop Config
conf
Config -> LoopFunction -> IO ()
loop Config
conf (Config -> LoopFunction
eventLoop Config
conf)
eventLoop :: Config -> TMVar SignalType -> TVar [String] -> IO ()
eventLoop :: Config -> LoopFunction
eventLoop Config
cfg TMVar SignalType
signal TVar [String]
tv = do
SignalType
typ <- STM SignalType -> IO SignalType
forall a. STM a -> IO a
atomically (STM SignalType -> IO SignalType)
-> STM SignalType -> IO SignalType
forall a b. (a -> b) -> a -> b
$ TMVar SignalType -> STM SignalType
forall a. TMVar a -> STM a
takeTMVar TMVar SignalType
signal
case SignalType
typ of
SignalType
Wakeup -> Config -> TVar [String] -> IO String
updateString Config
cfg TVar [String]
tv IO String -> (String -> IO ()) -> IO ()
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= String -> IO ()
putStrLn IO () -> IO () -> IO ()
forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> Config -> LoopFunction
eventLoop Config
cfg TMVar SignalType
signal TVar [String]
tv
SignalType
_ -> Config -> LoopFunction
eventLoop Config
cfg TMVar SignalType
signal TVar [String]
tv
updateString :: Config -> TVar [String] -> IO String
updateString :: Config -> TVar [String] -> IO String
updateString Config
conf TVar [String]
v = do
[String]
s <- TVar [String] -> IO [String]
forall a. TVar a -> IO a
readTVarIO TVar [String]
v
Config -> String -> IO String
format Config
conf ([String] -> String
forall (t :: * -> *) a. Foldable t => t [a] -> [a]
concat [String]
s)