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authorjao <jao@gnu.org>2018-11-21 23:51:41 +0000
committerjao <jao@gnu.org>2018-11-21 23:51:41 +0000
commit50134d5b5c4baabdfb35c0aeb8bf53d29f009c4d (patch)
treea710ee9a8e9ea9e46951d371af29081e1c72f502 /src/Xmobar/Plugins/StdinReader.hs
parent7674145b878fd315999558075edcfc5e09bdd91c (diff)
downloadxmobar-50134d5b5c4baabdfb35c0aeb8bf53d29f009c4d.tar.gz
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diff --git a/src/Xmobar/Plugins/StdinReader.hs b/src/Xmobar/Plugins/StdinReader.hs
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------------------------------------------------------------------------------
--- |
--- 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.Plugins
-import Xmobar.Actions (stripActions)
-
-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