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{-# LANGUAGE MultiParamTypeClasses, TypeSynonymInstances #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Layout.HintedTile
-- Copyright : (c) Peter De Wachter <pdewacht@gmail.com>
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : Peter De Wachter <pdewacht@gmail.com>
-- Andrea Rossato <andrea.rossato@unibz.it>
-- Stability : unstable
-- Portability : unportable
--
-- A gapless tiled layout that attempts to obey window size hints,
-- rather than simply ignoring them.
--
-----------------------------------------------------------------------------
module XMonad.Layout.HintedTile (
-- * Usage
-- $usage
HintedTile(..), Orientation(..)) where
import XMonad hiding (Tall(..))
import qualified XMonad.StackSet as W
import Control.Applicative ((<$>))
import Control.Monad
-- $usage
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Layout.HintedTile
--
-- Then edit your @layoutHook@ by adding the HintedTile layout:
--
-- > myLayouts = HintedTile 1 0.1 0.5 Tall ||| Full ||| etc..
-- > main = xmonad defaultConfig { layoutHook = myLayouts }
--
-- For more detailed instructions on editing the layoutHook see:
--
-- "XMonad.Doc.Extending#Editing_the_layout_hook"
data HintedTile a = HintedTile
{ nmaster :: Int
, delta, frac :: Rational
, orientation :: Orientation
} deriving ( Show, Read )
data Orientation = Wide | Tall deriving ( Show, Read )
instance LayoutClass HintedTile Window where
doLayout (HintedTile { orientation = o, nmaster = nm, frac = f }) r w' = do
bhs <- mapM getHints w
let (masters, slaves) = splitAt nm bhs
return (zip w (tiler masters slaves), Nothing)
where
w = W.integrate w'
tiler masters slaves
| null masters || null slaves = divide o (masters ++ slaves) r
| otherwise = split o f r (divide o masters) (divide o slaves)
pureMessage c m = fmap resize (fromMessage m) `mplus`
fmap incmastern (fromMessage m)
where
resize Shrink = c { frac = max 0 $ frac c - delta c }
resize Expand = c { frac = min 1 $ frac c + delta c }
incmastern (IncMasterN d) = c { nmaster = max 0 $ nmaster c + d }
description l = show (orientation l)
adjBorder :: Dimension -> Dimension -> D -> D
adjBorder n b (w, h) = (w + n * 2 * b, h + n * 2 * b)
-- | Transform a function on dimensions into one without regard for borders
hintsUnderBorder :: (Dimension, SizeHints) -> D -> D
hintsUnderBorder (bW, h) = adjBorder bW 1 . applySizeHints h . adjBorder bW (-1)
getHints :: Window -> X (Dimension, SizeHints)
getHints w = withDisplay $ \d -> io $ liftM2 (,)
(fromIntegral . wa_border_width <$> getWindowAttributes d w)
(getWMNormalHints d w)
-- Divide the screen vertically (horizontally) into n subrectangles
divide :: Orientation -> [(Dimension, SizeHints)] -> Rectangle -> [Rectangle]
divide _ [] _ = []
divide Tall (bh:bhs) (Rectangle sx sy sw sh) = (Rectangle sx sy w h) :
(divide Tall bhs (Rectangle sx (sy + fromIntegral h) sw (sh - h)))
where (w, h) = hintsUnderBorder bh (sw, sh `div` fromIntegral (1 + (length bhs)))
divide Wide (bh:bhs) (Rectangle sx sy sw sh) = (Rectangle sx sy w h) :
(divide Wide bhs (Rectangle (sx + fromIntegral w) sy (sw - w) sh))
where
(w, h) = hintsUnderBorder bh (sw `div` fromIntegral (1 + (length bhs)), sh)
-- Split the screen into two rectangles, using a rational to specify the ratio
split :: Orientation -> Rational -> Rectangle -> (Rectangle -> [Rectangle])
-> (Rectangle -> [Rectangle]) -> [Rectangle]
split Tall f (Rectangle sx sy sw sh) left right = leftRects ++ rightRects
where
leftw = floor $ fromIntegral sw * f
leftRects = left $ Rectangle sx sy leftw sh
rightx = (maximum . map rect_width) leftRects
rightRects = right $ Rectangle (sx + fromIntegral rightx) sy (sw - rightx) sh
split Wide f (Rectangle sx sy sw sh) top bottom = topRects ++ bottomRects
where
toph = floor $ fromIntegral sh * f
topRects = top $ Rectangle sx sy sw toph
bottomy = (maximum . map rect_height) topRects
bottomRects = bottom $ Rectangle sx (sy + fromIntegral bottomy) sw (sh - bottomy)
|
