mirror of
https://github.com/xmonad/xmonad-contrib.git
synced 2025-05-19 03:20:21 -07:00
104 lines
4.3 KiB
Haskell
104 lines
4.3 KiB
Haskell
{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}
|
|
|
|
-----------------------------------------------------------------------------
|
|
-- |
|
|
-- Module : XMonad.Layout.ThreeColumns
|
|
-- Copyright : (c) Kai Grossjohann <kai@emptydomain.de>
|
|
-- License : BSD3-style (see LICENSE)
|
|
--
|
|
-- Maintainer : ?
|
|
-- Stability : unstable
|
|
-- Portability : unportable
|
|
--
|
|
-- A layout similar to tall but with three columns. With 2560x1600 pixels this
|
|
-- layout can be used for a huge main window and up to six reasonable sized
|
|
-- slave windows.
|
|
--
|
|
-- Screenshot: <http://server.c-otto.de/xmonad/ThreeColumnsMiddle.png>
|
|
--
|
|
-----------------------------------------------------------------------------
|
|
|
|
module XMonad.Layout.ThreeColumns (
|
|
-- * Usage
|
|
-- $usage
|
|
ThreeCol(..)
|
|
) where
|
|
|
|
import XMonad
|
|
import qualified XMonad.StackSet as W
|
|
|
|
import Data.Ratio
|
|
|
|
import Control.Monad
|
|
|
|
-- $usage
|
|
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
|
|
--
|
|
-- > import XMonad.Layout.ThreeColumns
|
|
--
|
|
-- Then edit your @layoutHook@ by adding the ThreeCol layout:
|
|
--
|
|
-- > myLayouts = ThreeCol 1 (3/100) (1/2) ||| ThreeColMid 1 (3/100) (1/2) ||| etc..
|
|
-- > main = xmonad defaultConfig { layoutHook = myLayouts }
|
|
--
|
|
-- The first argument specifies hom many windows initially appear in the main
|
|
-- window. The second argument argument specifies the amount to resize while
|
|
-- resizing and the third argument specifies the initial size of the columns.
|
|
-- A positive size designates the fraction of the screen that the main window
|
|
-- should occupy, but if the size is negative the absolute value designates the
|
|
-- fraction a slave column should occupy. If both slave columns are visible,
|
|
-- they always occupy the same amount of space.
|
|
--
|
|
-- The ThreeColMid variant places the main window between the slave columns.
|
|
--
|
|
-- For more detailed instructions on editing the layoutHook see:
|
|
--
|
|
-- "XMonad.Doc.Extending#Editing_the_layout_hook"
|
|
|
|
-- | Arguments are nmaster, delta, fraction
|
|
data ThreeCol a = ThreeColMid { threeColNMaster :: !Int, threeColDelta :: !Rational, threeColFrac :: !Rational}
|
|
| ThreeCol { threeColNMaster :: !Int, threeColDelta :: !Rational, threeColFrac :: !Rational}
|
|
deriving (Show,Read)
|
|
|
|
instance LayoutClass ThreeCol a where
|
|
pureLayout (ThreeCol n _ f) r = doL False n f r
|
|
pureLayout (ThreeColMid n _ f) r = doL True n f r
|
|
handleMessage l m =
|
|
return $ msum [fmap resize (fromMessage m)
|
|
,fmap incmastern (fromMessage m)]
|
|
where resize Shrink = l { threeColFrac = max (-0.5) $ f-d }
|
|
resize Expand = l { threeColFrac = min 1 $ f+d }
|
|
incmastern (IncMasterN x) = l { threeColNMaster = max 0 (n+x) }
|
|
n = threeColNMaster l
|
|
d = threeColDelta l
|
|
f = threeColFrac l
|
|
description _ = "ThreeCol"
|
|
|
|
doL :: Bool-> Int-> Rational-> Rectangle-> W.Stack a-> [(a, Rectangle)]
|
|
doL m n f r = ap zip (tile3 m f r n . length) . W.integrate
|
|
|
|
-- | tile3. Compute window positions using 3 panes
|
|
tile3 :: Bool -> Rational -> Rectangle -> Int -> Int -> [Rectangle]
|
|
tile3 middle f r nmaster n
|
|
| n <= nmaster || nmaster == 0 = splitVertically n r
|
|
| n <= nmaster+1 = splitVertically nmaster s1 ++ splitVertically (n-nmaster) s2
|
|
| otherwise = splitVertically nmaster r1 ++ splitVertically nslave1 r2 ++ splitVertically nslave2 r3
|
|
where (r1, r2, r3) = split3HorizontallyBy middle (if f<0 then 1+2*f else f) r
|
|
(s1, s2) = splitHorizontallyBy (if f<0 then 1+f else f) r
|
|
nslave = (n - nmaster)
|
|
nslave1 = ceiling (nslave % 2)
|
|
nslave2 = (n - nmaster - nslave1)
|
|
|
|
split3HorizontallyBy :: Bool -> Rational -> Rectangle -> (Rectangle, Rectangle, Rectangle)
|
|
split3HorizontallyBy middle f (Rectangle sx sy sw sh) =
|
|
if middle
|
|
then ( Rectangle (sx + fromIntegral r2w) sy r1w sh
|
|
, Rectangle sx sy r2w sh
|
|
, Rectangle (sx + fromIntegral r2w + fromIntegral r1w) sy r3w sh )
|
|
else ( Rectangle sx sy r1w sh
|
|
, Rectangle (sx + fromIntegral r1w) sy r2w sh
|
|
, Rectangle (sx + fromIntegral r1w + fromIntegral r2w) sy r3w sh )
|
|
where r1w = ceiling $ fromIntegral sw * f
|
|
r2w = ceiling ( (sw - r1w) % 2 )
|
|
r3w = sw - r1w - r2w
|