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|
{-# LANGUAGE MultiParamTypeClasses, FlexibleInstances #-}
module Internal.Layout where
import Control.Applicative
import XMonad.Layout.Spacing
import Data.List
import XMonad.Layout.Spiral
import XMonad.Layout.ThreeColumns
import XMonad.Layout.Grid
import XMonad.Layout
import XMonad.Layout.LayoutModifier
import XMonad
import XMonad.Core
import qualified XMonad.StackSet as W
myLayout =
ModifiedLayout (Zoomable False 0.05 0.05) $
spacingRaw True (Border 5 5 5 5) True (Border 5 5 5 5) True $
spiral (6/7) |||
Tall 1 (3/100) (1/2) |||
ThreeCol 1 (3/100) (1/2) |||
Grid
data ResizeZoom = ShrinkZoom | ExpandZoom deriving (Typeable)
instance Message ResizeZoom where
data Zoomable a = Zoomable Bool Float Float -- True if zooming in on the focused window.
deriving (Show, Read)
data ToggleZoom = ToggleZoom
deriving (Typeable)
data AlterZoom = AlterZoom Float Float
deriving (Typeable)
instance Message ToggleZoom where
instance Message AlterZoom where
instance (Eq a) => LayoutModifier Zoomable a where
redoLayout (Zoomable doit ws hs) (Rectangle x y w h) stack returned =
if doit
then
let focused = W.focus <$> stack
(zoomed, rest) = partition ((==focused) . Just . fst) returned
in case zoomed of
[] -> return (rest, Nothing)
((fwin, _):_) -> return $ ((fwin, Rectangle (x + wp) (y + hp) (w - fromIntegral (wp * 2)) (h - fromIntegral (hp * 2))) : rest, Nothing)
else return (returned, Nothing)
where
wp = floor $ (fromIntegral w) * ws
hp = floor $ (fromIntegral h) * hs
handleMessOrMaybeModifyIt self@(Zoomable showing sw sh) mess =
return $
(handleResize <$> fromMessage mess)
<|> ((Left . handleZoom) <$> fromMessage mess)
where
handleResize r =
if showing
then Left $ Zoomable showing (guard $ sw + d) (guard $ sh + d)
else Right $ case r of
ShrinkZoom -> SomeMessage Shrink
ExpandZoom -> SomeMessage Expand
where d = (case r of
ShrinkZoom -> -1
ExpandZoom -> 1) * 0.02
handleZoom ToggleZoom = Zoomable (not showing) sw sh
guard f | f > 1 = 1
| f < 0 = 0
| otherwise = f
|
