summaryrefslogtreecommitdiffhomepage
path: root/src/Xmobar/Run/Exec.hs
diff options
context:
space:
mode:
authorjao <jao@gnu.org>2018-12-02 05:50:56 +0000
committerjao <jao@gnu.org>2018-12-02 05:50:56 +0000
commit6fc4f0cfcb809b51048e6a3d952b9c887e07b13b (patch)
tree1af7295e8ba7f675d4cde30e34bcc91a79692a54 /src/Xmobar/Run/Exec.hs
parent453ad68e5b24a6dd3a2aaba8727dc6c5c0bdfc9e (diff)
downloadxmobar-6fc4f0cfcb809b51048e6a3d952b9c887e07b13b.tar.gz
xmobar-6fc4f0cfcb809b51048e6a3d952b9c887e07b13b.tar.bz2
Fix: exposing the Command constructors in lib
Diffstat (limited to 'src/Xmobar/Run/Exec.hs')
-rw-r--r--src/Xmobar/Run/Exec.hs48
1 files changed, 48 insertions, 0 deletions
diff --git a/src/Xmobar/Run/Exec.hs b/src/Xmobar/Run/Exec.hs
new file mode 100644
index 0000000..c8fcb9e
--- /dev/null
+++ b/src/Xmobar/Run/Exec.hs
@@ -0,0 +1,48 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Xmobar.Exec
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- The 'Exec' class and the 'Command' data type.
+--
+-- The 'Exec' class rappresents the executable types, whose constructors may
+-- appear in the 'Config.commands' field of the 'Config.Config' data type.
+--
+-- The 'Command' data type is for OS commands to be run by xmobar
+--
+-----------------------------------------------------------------------------
+
+module Xmobar.Run.Exec (Exec (..), tenthSeconds) where
+
+import Prelude
+import Data.Char
+import Control.Concurrent
+
+import Xmobar.System.Signal
+
+-- | 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
+
+class Show e => Exec e where
+ alias :: e -> String
+ alias e = takeWhile (not . isSpace) $ show e
+ rate :: e -> Int
+ rate _ = 10
+ run :: e -> IO String
+ run _ = return ""
+ start :: e -> (String -> IO ()) -> IO ()
+ start e cb = go
+ where go = run e >>= cb >> tenthSeconds (rate e) >> go
+ trigger :: e -> (Maybe SignalType -> IO ()) -> IO ()
+ trigger _ sh = sh Nothing