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|
{-# OPTIONS_GHC -fglasgow-exts #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonadContrib.Magnifier
-- Copyright : (c) Peter De Wachter 2007
-- License : BSD-style (see xmonad/LICENSE)
--
-- Maintainer : Peter De Wachter <pdewacht@gmail.com>
-- Stability : unstable
-- Portability : unportable
--
-- Screenshot : <http://caladan.rave.org/magnifier.png>
--
-- This layout hack increases the size of the window that has focus.
--
-----------------------------------------------------------------------------
module XMonadContrib.Magnifier (
-- * Usage
-- $usage
magnifier, magnifier') where
import Graphics.X11.Xlib
import XMonad
import StackSet
-- $usage
-- > import XMonadContrib.Magnifier
-- > defaultLayouts = [ magnifier tiled , magnifier $ mirror tiled ]
-- | Increase the size of the window that has focus, unless it is the master window.
magnifier :: Eq a => Layout a -> Layout a
magnifier l = l { doLayout = \r s -> unlessMaster applyMagnifier r s `fmap` doLayout l r s
, modifyLayout = \x -> fmap magnifier `fmap` modifyLayout l x }
-- | Increase the size of the window that has focus, even if it is the master window.
magnifier' :: Eq a => Layout a -> Layout a
magnifier' l = l { doLayout = \r s -> applyMagnifier r s `fmap` doLayout l r s
, modifyLayout = \x -> fmap magnifier' `fmap` modifyLayout l x }
type DoLayout = Eq a => Rectangle -> Stack a -> [(a, Rectangle)] -> [(a, Rectangle)]
unlessMaster :: DoLayout -> DoLayout
unlessMaster f r s = if null (up s) then id else f r s
applyMagnifier :: DoLayout
applyMagnifier r s = reverse . foldr accumulate []
where accumulate (w,wr) ws | w == focus s = ws ++ [(w, shrink r $ magnify wr)]
| otherwise = (w,wr) : ws
magnify :: Rectangle -> Rectangle
magnify (Rectangle x y w h) = Rectangle x' y' w' h'
where x' = x - fromIntegral (w' - w) `div` 2
y' = y - fromIntegral (h' - h) `div` 2
w' = round $ fromIntegral w * zoom
h' = round $ fromIntegral h * zoom
zoom = 1.5 :: Double
shrink :: Rectangle -> Rectangle -> Rectangle
shrink (Rectangle sx sy sw sh) (Rectangle x y w h) = Rectangle x' y' w' h'
where x' = max sx x
y' = max sy y
w' = min w (fromIntegral sx + sw - fromIntegral x')
h' = min h (fromIntegral sy + sh - fromIntegral y')
|
