1 files changed, 44 insertions, 0 deletions
diff --git a/src/Xmobar/Plugins/StdinReader.hs b/src/Xmobar/Plugins/StdinReader.hs
new file mode 100644
index 0000000..372e4f9
--- /dev/null
+++ b/src/Xmobar/Plugins/StdinReader.hs
@@ -0,0 +1,44 @@
+-----------------------------------------------------------------------------
+-- |
+-- 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