blob: 7f5f2ae4a7fd0bd1d3b8f0b7f9e636cd98f155e2 (
plain)
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
43
44
45
|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.StdinReader
-- Copyright : (c) Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
-- Stability : unstable
-- Portability : unportable
--
-- A plugin for reading from `stdin`.
--
-- Exports:
-- - `StdinReader` to safely display stdin content (striping actions).
-- - `UnsafeStdinReader` to display stdin content as-is.
--
-----------------------------------------------------------------------------
module Xmobar.Plugins.StdinReader (StdinReader(..)) where
import Prelude
import System.Posix.Process
import System.Exit
import System.IO
import Control.Exception (SomeException(..), handle)
import Xmobar.Run.Commands
import Xmobar.X11.Actions (stripActions)
import Xmobar.System.Utils (hGetLineSafe)
data StdinReader = StdinReader | UnsafeStdinReader
deriving (Read, Show)
instance Exec StdinReader where
start stdinReader cb = do
s <- handle (\(SomeException e) -> do hPrint stderr e; return "")
(hGetLineSafe stdin)
cb $ escape stdinReader s
eof <- isEOF
if eof
then exitImmediately ExitSuccess
else start stdinReader cb
escape :: StdinReader -> String -> String
escape StdinReader = stripActions
escape UnsafeStdinReader = id
|
