ManageHook: add a 'property' Query that can get an arbitrary String property from a window (such as WM_WINDOW_ROLE, for example)

darcs-hash:20080325145414-bd4d7-c7aee8e7ee691e4a75a88451762472db63aa6e45

1 files changed, 12 insertions, 0 deletions

diff --git a/XMonad/ManageHook.hs b/XMonad/ManageHook.hs
index 072fe1f..b4996b2 100644
--- a/XMonad/ManageHook.hs
+++ b/XMonad/ManageHook.hs
@@ -20,6 +20,7 @@ module XMonad.ManageHook where
 
 import XMonad.Core
 import Graphics.X11.Xlib.Extras
+import Graphics.X11.Xlib (Display,Window)
 import Control.Monad.Reader
 import Data.Maybe
 import Data.Monoid
@@ -65,6 +66,17 @@ title     = ask >>= (\w -> liftX $ withDisplay $ \d -> fmap (fromMaybe "") $ io
 resource  = ask >>= (\w -> liftX $ withDisplay $ \d -> fmap resName        $ io $ getClassHint d w)
 className = ask >>= (\w -> liftX $ withDisplay $ \d -> fmap resClass       $ io $ getClassHint d w)
 
+-- | A query that can return an arbitrary X property of type String,
+--   identified by name.
+property :: String -> Query String
+property p = ask >>= (\w -> liftX $ withDisplay $ \d -> fmap (fromMaybe "") $ getProperty d w p)
+
+getProperty :: Display -> Window -> String -> X (Maybe String)
+getProperty d w p = do
+  a  <- getAtom p
+  md <- io $ getWindowProperty8 d a w
+  return $ fmap (map (toEnum . fromIntegral)) md
+
 -- | Modify the 'WindowSet' with a pure function.
 doF :: (WindowSet -> WindowSet) -> ManageHook
 doF = return . Endo