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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
tall, wide ) where
import XMonad
import XMonad.Layouts ( Resize(..), IncMasterN(..) )
import XMonad.Operations ( applySizeHints )
import qualified XMonad.StackSet as W
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras
import Control.Monad.Reader
-- $usage
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Layout.HintedTile
--
-- The edit your @layoutHook@ by adding the HintedTile layout:
--
-- > mylayout = tall 1 0.1 0.5 ||| Full ||| etc..
-- > main = xmonad dafaultConfig { layoutHook = mylayouts }
--
-- For more detailed instructions on editing the layoutHook see:
-- "XMonad.Doc.Extending#Editing_the_layout_hook"
data HintedTile a =
HT { nmaster :: Int
, delta, frac :: Rational
, orientation :: Orientation
} deriving ( Show, Read )
data Orientation = Wide | Tall deriving ( Show, Read )
tall, wide :: Int -> Rational -> Rational -> HintedTile Window
wide n d f = HT {nmaster = n, delta = d, frac = f, orientation = Tall }
tall n d f = HT {nmaster = n, delta = d, frac = f, orientation = Wide }
instance LayoutClass HintedTile Window where
doLayout c rect w' = let w = W.integrate w'
in do { hints <- sequence (map getHints w)
; b <- asks (borderWidth . config)
; return (zip w (tiler b (frac c) rect `uncurry` splitAt (nmaster c) hints)
, Nothing) }
where
(split, divide) =
case orientation c of
Wide -> (splitHorizontally, divideHorizontally)
Tall -> (splitVertically, divideVertically )
tiler b f r masters slaves =
if null masters || null slaves
then divide b (masters ++ slaves) r
else split f r (divide b masters) (divide b 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 = "HintedTile " ++ show (orientation l)
addBorder, substractBorder :: Dimension -> (Dimension, Dimension) -> (Dimension, Dimension)
addBorder b (w, h) = (w + 2 * b, h + 2 * b)
substractBorder b (w, h) = (w - 2 * b, h - 2 * b)
getHints :: Window -> X SizeHints
getHints w = withDisplay $ \d -> io $ getWMNormalHints d w
-- Divide the screen vertically (horizontally) into n subrectangles
divideVertically, divideHorizontally :: Dimension -> [SizeHints] -> Rectangle -> [Rectangle]
divideVertically _ [] _ = [] -- there's a fold here, struggling to get out
divideVertically b (hints:rest) (Rectangle sx sy sw sh) = (Rectangle sx sy w h) :
(divideVertically b rest (Rectangle sx (sy + fromIntegral h) sw (sh - h)))
where (w, h) = addBorder b $ applySizeHints hints $ substractBorder b
(sw, sh `div` fromIntegral (1 + (length rest)))
divideHorizontally _ [] _ = []
divideHorizontally b (hints:rest) (Rectangle sx sy sw sh) = (Rectangle sx sy w h) :
(divideHorizontally b rest (Rectangle (sx + fromIntegral w) sy (sw - w) sh))
where (w, h) = addBorder b $ applySizeHints hints $ substractBorder b
(sw `div` fromIntegral (1 + (length rest)), sh)
-- Split the screen into two rectangles, using a rational to specify the ratio
splitHorizontally, splitVertically :: Rational -> Rectangle -> (Rectangle -> [Rectangle]) -> (Rectangle -> [Rectangle]) -> [Rectangle]
splitHorizontally 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
splitVertically 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)
|
