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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')
import Actions (stripActions)
data XMonadLog = XMonadLog
| UnsafeXMonadLog
| XPropertyLog String
| NamedXPropertyLog String String
deriving (Read, Show)
instance Exec XMonadLog where
alias XMonadLog = "XMonadLog"
alias UnsafeXMonadLog = "UnsafeXMonadLog"
alias (XPropertyLog atom) = atom
alias (NamedXPropertyLog _ name) = name
start x cb = do
let atom = case x of
XMonadLog -> "_XMONAD_LOG"
UnsafeXMonadLog -> "_XMONAD_LOG"
XPropertyLog a -> a
NamedXPropertyLog a _ -> a
sanitize = case x of
UnsafeXMonadLog -> id
_ -> stripActions
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 . sanitize . 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
|
