From e3853a9cb2a9a2cffa174d1334e2ca8ba610f151 Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Tue, 21 Dec 2010 02:36:35 +0100
Subject: Haskell sources moved to src/ to unclutter toplevel

---
 src/Plugins/XMonadLog.hs | 72 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/Plugins/XMonadLog.hs

(limited to 'src/Plugins/XMonadLog.hs')

diff --git a/src/Plugins/XMonadLog.hs b/src/Plugins/XMonadLog.hs
new file mode 100644
index 0000000..3461e26
--- /dev/null
+++ b/src/Plugins/XMonadLog.hs
@@ -0,0 +1,72 @@
+{-# 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
-- 
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