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authorJose Antonio Ortega Ruiz <jao@gnu.org>2010-12-21 02:36:35 +0100
committerJose Antonio Ortega Ruiz <jao@gnu.org>2010-12-21 02:36:35 +0100
commite3853a9cb2a9a2cffa174d1334e2ca8ba610f151 (patch)
tree13aa04faea320afe85636e23686280386c1c2910 /src/Plugins/XMonadLog.hs
parent598bfe5deeff079280e8513c55dc7bda3e8cf9a0 (diff)
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Haskell sources moved to src/ to unclutter toplevel
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diff --git a/src/Plugins/XMonadLog.hs b/src/Plugins/XMonadLog.hs
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+{-# LANGUAGE CPP #-}
+
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.StdinReader
+-- Copyright : (c) Spencer Janssen
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Spencer Janssen <spencerjanssen@gmail.com>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A plugin to display information from _XMONAD_LOG, specified at
+-- http://code.haskell.org/XMonadContrib/XMonad/Hooks/DynamicLog.hs
+--
+-----------------------------------------------------------------------------
+
+module Plugins.XMonadLog (XMonadLog(..)) where
+
+import Control.Monad
+import Graphics.X11
+import Graphics.X11.Xlib.Extras
+import Plugins
+#ifdef UTF8
+#undef UTF8
+import Codec.Binary.UTF8.String as UTF8
+#define UTF8
+#endif
+import Foreign.C (CChar)
+import XUtil (nextEvent')
+
+
+data XMonadLog = XMonadLog | XPropertyLog String
+ deriving (Read, Show)
+
+instance Exec XMonadLog where
+ alias XMonadLog = "XMonadLog"
+ alias (XPropertyLog atom) = atom
+
+ start x cb = do
+ let atom = case x of
+ XMonadLog -> "_XMONAD_LOG"
+ XPropertyLog a -> a
+ d <- openDisplay ""
+ xlog <- internAtom d atom False
+
+ root <- rootWindow d (defaultScreen d)
+ selectInput d root propertyChangeMask
+
+ let update = do
+ mwp <- getWindowProperty8 d xlog root
+ maybe (return ()) (cb . decodeCChar) mwp
+
+ update
+
+ allocaXEvent $ \ep -> forever $ do
+ nextEvent' d ep
+ e <- getEvent ep
+ case e of
+ PropertyEvent { ev_atom = a } | a == xlog -> update
+ _ -> return ()
+
+ return ()
+
+decodeCChar :: [CChar] -> String
+#ifdef UTF8
+#undef UTF8
+decodeCChar = UTF8.decode . map fromIntegral
+#define UTF8
+#else
+decodeCChar = map (toEnum . fromIntegral)
+#endif