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95 lines
3.2 KiB
Haskell
95 lines
3.2 KiB
Haskell
-----------------------------------------------------------------------------
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-- |
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-- Module : XMonad.Hooks.FadeInactive
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-- Copyright : (c) 2008 Justin Bogner <mail@justinbogner.com>
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-- License : BSD
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--
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-- Maintainer : Justin Bogner <mail@justinbogner.com>
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-- Stability : unstable
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-- Portability : unportable
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--
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-- Makes XMonad set the _NET_WM_WINDOW_OPACITY atom for inactive windows,
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-- which causes those windows to become slightly translucent if something
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-- like xcompmgr is running
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-----------------------------------------------------------------------------
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module XMonad.Hooks.FadeInactive (
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-- * Usage
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-- $usage
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setOpacity,
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isUnfocused,
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fadeIn,
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fadeOut,
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fadeIf,
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fadeInactiveLogHook,
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fadeOutLogHook
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) where
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import XMonad
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import qualified XMonad.StackSet as W
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import Control.Monad
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-- $usage
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-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
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--
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-- > import XMonad
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-- > import XMonad.Hooks.FadeInactive
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-- >
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-- > myLogHook :: X ()
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-- > myLogHook = fadeInactiveLogHook fadeAmount
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-- > where fadeAmount = 0.8
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-- >
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-- > main = xmonad defaultConfig { logHook = myLogHook }
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--
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-- fadeAmount can be any rational between 0 and 1.
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-- you will need to have xcompmgr <http://freedesktop.org/wiki/Software/xapps>
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-- or something similar for this to do anything
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--
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-- For more detailed instructions on editing the layoutHook see:
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--
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-- "XMonad.Doc.Extending#The_log_hook_and_external_status_bars"
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--
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-- For more detailed instructions on editing the layoutHook see:
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--
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-- "XMonad.Doc.Extending#Editing_the_layout_hook"
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-- | Converts a percentage to the format required for _NET_WM_WINDOW_OPACITY
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rationalToOpacity :: Integral a => Rational -> a
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rationalToOpacity perc
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| perc < 0 || perc > 1 = round perc -- to maintain backwards-compatability
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| otherwise = round $ perc * 0xffffffff
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-- | sets the opacity of a window
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setOpacity :: Window -> Rational -> X ()
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setOpacity w t = withDisplay $ \dpy -> do
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a <- getAtom "_NET_WM_WINDOW_OPACITY"
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c <- getAtom "CARDINAL"
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io $ changeProperty32 dpy w a c propModeReplace [rationalToOpacity t]
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-- | fades a window out by setting the opacity
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fadeOut :: Rational -> Window -> X ()
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fadeOut = flip setOpacity
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-- | makes a window completely opaque
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fadeIn :: Window -> X ()
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fadeIn = fadeOut 1
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-- | Fades a window by the specified amount if it satisfies the first query, otherwise
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-- makes it opaque.
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fadeIf :: Query Bool -> Rational -> Query Rational
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fadeIf qry amt = qry >>= \b -> return $ if b then amt else 1
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-- | sets the opacity of inactive windows to the specified amount
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fadeInactiveLogHook :: Rational -> X ()
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fadeInactiveLogHook = fadeOutLogHook . fadeIf isUnfocused
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-- | returns True if the window doesn't have the focus.
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isUnfocused :: Query Bool
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isUnfocused = ask >>= \w -> liftX . gets $ maybe True (w /=) . W.peek . windowset
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-- | fades out every window by the amount returned by the query.
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fadeOutLogHook :: Query Rational -> X ()
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fadeOutLogHook qry = withWindowSet $ \s -> do
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let visibleWins = (W.integrate' . W.stack . W.workspace . W.current $ s) ++
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concatMap (W.integrate' . W.stack . W.workspace) (W.visible s)
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forM_ visibleWins $ liftM2 (=<<) setOpacity (runQuery qry)
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