diff options
Diffstat (limited to 'XUtil.hsc')
| -rw-r--r-- | XUtil.hsc | 28 |
1 files changed, 10 insertions, 18 deletions
@@ -40,6 +40,7 @@ import qualified Graphics.X11.Xlib as Xlib (textExtents, textWidth) import Graphics.X11.Xlib.Extras import System.Posix.Types (Fd(..)) import System.IO +import System.IO.Unsafe (unsafePerformIO) #if defined XFT || defined UTF8 import Foreign.C import qualified System.IO.UTF8 as UTF8 (readFile,hGetLine) @@ -189,41 +190,32 @@ initColor dpy c = (initColor' dpy c) `catch` (const . return $ DynPixel False (blackPixel dpy $ defaultScreen dpy)) type ColorCache = [(String, Color)] -colorCache :: IO (IORef ColorCache) -colorCache = newIORef [] +{-# NOINLINE colorCache #-} +colorCache :: IORef ColorCache +colorCache = unsafePerformIO $ newIORef [] getCachedColor :: String -> IO (Maybe Color) -getCachedColor color_name = do - ref <- colorCache - result <- lookup color_name `fmap` readIORef ref - return result +getCachedColor color_name = lookup color_name `fmap` readIORef colorCache putCachedColor :: String -> Color -> IO () -putCachedColor color_name color_id = do - ref <- colorCache - modifyIORef ref $ \cache -> (color_name,color_id) : cache +putCachedColor name c_id = modifyIORef colorCache $ \c -> (name, c_id) : c initColor' :: Display -> String -> IO DynPixel initColor' dpy c = do + let colormap = defaultColormap dpy (defaultScreen dpy) cached_color <- getCachedColor c - c' <- do - case cached_color of + c' <- case cached_color of Just col -> return col _ -> do (c'', _) <- allocNamedColor dpy colormap c putCachedColor c c'' return c'' return $ DynPixel True (color_pixel c') - where colormap = defaultColormap dpy (defaultScreen dpy) withColors :: MonadIO m => Display -> [String] -> ([Pixel] -> m a) -> m a withColors d cs f = do + let cmap = defaultColormap d (defaultScreen d) ps <- mapM (io . initColor d) cs - r <- f $ map pixel ps - -- there is color leak in 'putCachedColor'. might be freed at xmobar shutdown - -- io $ freeColors d cmap (map pixel $ filter allocated ps) 0 - return r - where - cmap = defaultColormap d (defaultScreen d) + f $ map pixel ps -- | Creates a window with the attribute override_redirect set to True. -- Windows Managers should not touch this kind of windows. |