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{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses, TypeSynonymInstances #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Layout.LayoutHints
-- Copyright : (c) David Roundy <droundy@darcs.net>
-- License : BSD
--
-- Maintainer : David Roundy <droundy@darcs.net>
-- Stability : unstable
-- Portability : portable
--
-- Make layouts respect size hints.
-----------------------------------------------------------------------------
module XMonad.Layout.LayoutHints (
-- * usage
-- $usage
layoutHints,
LayoutHints) where
import XMonad hiding ( trace )
import XMonad.Layout.LayoutModifier
import XMonad.Layout.Decoration ( isDecoration )
-- $usage
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Layout.LayoutHints
--
-- Then edit your @layoutHook@ by adding the LayoutHints layout modifier
-- to some layout:
--
-- > myLayouts = layoutHints (Tall 1 (3/100) (1/2)) ||| Full ||| etc..
-- > main = xmonad defaultConfig { layoutHook = myLayouts }
--
-- For more detailed instructions on editing the layoutHook see:
--
-- "XMonad.Doc.Extending#Editing_the_layout_hook"
layoutHints :: (LayoutClass l a) => l a -> ModifiedLayout LayoutHints l a
layoutHints = ModifiedLayout LayoutHints
-- | Expand a size by the given multiple of the border width. The
-- multiple is most commonly 1 or -1.
adjBorders :: Dimension -> Dimension -> D -> D
adjBorders bW mult (w,h) = (w+2*mult*bW, h+2*mult*bW)
data LayoutHints a = LayoutHints deriving (Read, Show)
instance LayoutModifier LayoutHints Window where
modifierDescription _ = "Hinted"
redoLayout _ _ _ xs = do
bW <- asks (borderWidth . config)
xs' <- mapM (applyHint bW) xs
return (xs', Nothing)
where
applyHint bW (w,r@(Rectangle a b c d)) =
withDisplay $ \disp -> do
isd <- isDecoration w
sh <- io $ getWMNormalHints disp w
let (c',d') = adjBorders 1 bW . applySizeHints sh . adjBorders bW (-1) $ (c,d)
return (w, if isd then r else Rectangle a b c' d')
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