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-rw-r--r--src/Xmobar/Utils.hs82
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diff --git a/src/Xmobar/Utils.hs b/src/Xmobar/Utils.hs
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-{-# LANGUAGE CPP #-}
-
-------------------------------------------------------------------------------
--- |
--- Module: Utils
--- Copyright: (c) 2010, 2018 Jose Antonio Ortega Ruiz
--- License: BSD3-style (see LICENSE)
---
--- Maintainer: Jose A Ortega Ruiz <jao@gnu.org>
--- Stability: unstable
--- Portability: unportable
--- Created: Sat Dec 11, 2010 20:55
---
---
--- Miscellaneous utility functions
---
-------------------------------------------------------------------------------
-
-
-module Xmobar.Utils
- (expandHome, changeLoop, hGetLineSafe, nextEvent', tenthSeconds)
-where
-
-import Control.Monad
-import Control.Concurrent
-import Control.Concurrent.STM
-import System.Posix.Types (Fd(..))
-
-import System.Environment
-import System.FilePath
-import System.IO
-
-import Graphics.X11.Xlib (
- Display(..), XEventPtr, nextEvent, pending, connectionNumber)
-
-#if defined XFT || defined UTF8
-import qualified System.IO as S (hGetLine)
-#endif
-
-hGetLineSafe :: Handle -> IO String
-#if defined XFT || defined UTF8
-hGetLineSafe = S.hGetLine
-#else
-hGetLineSafe = hGetLine
-#endif
-
-
-expandHome :: FilePath -> IO FilePath
-expandHome ('~':'/':path) = fmap (</> path) (getEnv "HOME")
-expandHome p = return p
-
-changeLoop :: Eq a => STM a -> (a -> IO ()) -> IO ()
-changeLoop s f = atomically s >>= go
- where
- go old = do
- f old
- go =<< atomically (do
- new <- s
- guard (new /= old)
- return new)
-
--- | A version of nextEvent that does not block in foreign calls.
-nextEvent' :: Display -> XEventPtr -> IO ()
-nextEvent' d p = do
- pend <- pending d
- if pend /= 0
- then nextEvent d p
- else do
- threadWaitRead (Fd fd)
- nextEvent' d p
- where
- fd = connectionNumber d
-
-
--- | Work around to the Int max bound: since threadDelay takes an Int, it
--- is not possible to set a thread delay grater than about 45 minutes.
--- With a little recursion we solve the problem.
-tenthSeconds :: Int -> IO ()
-tenthSeconds s | s >= x = do threadDelay (x * 100000)
- tenthSeconds (s - x)
- | otherwise = threadDelay (s * 100000)
- where x = (maxBound :: Int) `div` 100000