blob: f1477cecf8e6ecde045961842876775ed26d1fad (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
{-# LANGUAGE DeriveDataTypeable #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Util.SpawnNamedPipe
-- Copyright : (c) Christian Wills 2014
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : cwills.dev@gmail.com
-- Stability : unstable
-- Portability : not portable
--
-- A module for spawning a pipe whose handle lives in the Xmonad state. This
-- makes is possible to start dzen in the startup hook and pipe stuff to it in
-- the logHook cleanly.
--
-----------------------------------------------------------------------------
module XMonad.Util.SpawnNamedPipe (spawnNamedPipe, getNamedPipeHandle) where
import XMonad
import XMonad.Util.Run
import System.IO
import qualified XMonad.Util.ExtensibleState as XS
import Control.Monad
import qualified Data.Map.Strict as Map
data NamedPipes = NamedPipes { pipeMap :: (Map.Map String Handle) }
deriving (Show, Typeable)
instance ExtensionClass NamedPipes where
initialValue = NamedPipes Map.empty
spawnNamedPipe :: String -> String -> X ()
spawnNamedPipe cmd name = do
b <- XS.gets (Map.member name . pipeMap)
when (not b) $ do
h <- spawnPipe cmd
XS.modify (NamedPipes . Map.insert name h . pipeMap)
getNamedPipeHandle :: String -> X (Maybe Handle)
getNamedPipeHandle name = XS.gets (Map.lookup name . pipeMap)
|
