Add dmenu (thanks jcreigh)

Dmenu.hs

@@ -0,0 +1,32 @@
+module XMonadContrib.Dmenu (dmenu, dmenuXinerama, runProcessWithInput) where
+
+import XMonad
+import qualified StackSet as W
+import System.Process
+import System.IO
+import Control.Monad
+import Control.Monad.State
+import Data.Maybe
+import qualified Data.Map as M
+
+runProcessWithInput :: FilePath -> [String] -> String -> IO String
+runProcessWithInput cmd args input = do
+    (pin, pout, perr, ph) <- runInteractiveProcess cmd args Nothing Nothing
+    hPutStr pin input
+    hClose pin
+    output <- hGetContents pout
+    when (output==output) $ return ()
+    hClose pout
+    hClose perr
+    waitForProcess ph
+    return output
+    
+dmenuXinerama :: [String] -> X String
+dmenuXinerama opts = do
+    ws <- gets workspace
+    let curscreen = fromIntegral $ fromMaybe 0 (M.lookup (W.current ws) (W.ws2screen ws)) :: Int
+    io $ runProcessWithInput "dmenu" ["-xs", show (curscreen+1)] (unlines opts)
+
+dmenu :: [String] -> IO String
+dmenu opts = runProcessWithInput "dmenu" [] (unlines opts)
+