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105 lines
3.9 KiB
Haskell
105 lines
3.9 KiB
Haskell
-----------------------------------------------------------------------------
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-- |
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-- Module : XMonadContrib.Spiral
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-- Copyright : (c) Joe Thornber <joe.thornber@gmail.com>
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-- License : BSD3-style (see LICENSE)
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--
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-- Maintainer : Joe Thornber <joe.thornber@gmail.com>
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-- Stability : stable
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-- Portability : portable
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--
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-- Spiral adds a spiral tiling layout
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--
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-----------------------------------------------------------------------------
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module XMonadContrib.Spiral (
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-- * Usage
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-- $usage
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spiral
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, spiralWithDir
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, Rotation (..)
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, Direction (..)
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) where
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import Graphics.X11.Xlib
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import Operations
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import Data.Ratio
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import XMonad
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import XMonadContrib.LayoutHelpers
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-- $usage
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-- You can use this module with the following in your Config.hs file:
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--
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-- > import XMonadContrib.Spiral
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--
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-- > defaultLayouts = [ full, spiral (1 % 1), ... ]
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-- %import XMonadContrib.Spiral
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-- %layout , spiral (1 % 1)
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fibs :: [Integer]
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fibs = 1 : 1 : (zipWith (+) fibs (tail fibs))
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mkRatios :: [Integer] -> [Rational]
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mkRatios (x1:x2:xs) = (x1 % x2) : mkRatios (x2:xs)
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mkRatios _ = []
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data Rotation = CW | CCW
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data Direction = East | South | West | North deriving (Eq, Enum)
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blend :: Rational -> [Rational] -> [Rational]
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blend scale ratios = zipWith (+) ratios scaleFactors
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where
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len = length ratios
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step = (scale - (1 % 1)) / (fromIntegral len)
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scaleFactors = map (* step) . reverse . take len $ [0..]
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spiral :: Rational -> Layout a
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spiral = spiralWithDir East CW
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spiralWithDir :: Direction -> Rotation -> Rational -> Layout a
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spiralWithDir dir rot scale = Layout { doLayout = l2lModDo fibLayout,
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modifyLayout = \m -> return $ fmap resize $ fromMessage m }
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where
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fibLayout sc ws = zip ws rects
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where ratios = blend scale . reverse . take (length ws - 1) . mkRatios $ tail fibs
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rects = divideRects (zip ratios dirs) sc
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dirs = dropWhile (/= dir) $ case rot of
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CW -> cycle [East .. North]
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CCW -> cycle [North, West, South, East]
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resize Expand = spiralWithDir dir rot $ (21 % 20) * scale
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resize Shrink = spiralWithDir dir rot $ (20 % 21) * scale
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-- This will produce one more rectangle than there are splits details
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divideRects :: [(Rational, Direction)] -> Rectangle -> [Rectangle]
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divideRects [] r = [r]
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divideRects ((r,d):xs) rect = case divideRect r d rect of
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(r1, r2) -> r1 : (divideRects xs r2)
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-- It's much simpler if we work with all Integers and convert to
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-- Rectangle at the end.
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data Rect = Rect Integer Integer Integer Integer
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fromRect :: Rect -> Rectangle
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fromRect (Rect x y w h) = Rectangle (fromIntegral x) (fromIntegral y) (fromIntegral w) (fromIntegral h)
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toRect :: Rectangle -> Rect
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toRect (Rectangle x y w h) = Rect (fromIntegral x) (fromIntegral y) (fromIntegral w) (fromIntegral h)
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divideRect :: Rational -> Direction -> Rectangle -> (Rectangle, Rectangle)
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divideRect r d rect = let (r1, r2) = divideRect' r d $ toRect rect in
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(fromRect r1, fromRect r2)
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divideRect' :: Rational -> Direction -> Rect -> (Rect, Rect)
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divideRect' ratio dir (Rect x y w h) =
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case dir of
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East -> let (w1, w2) = chop ratio w in (Rect x y w1 h, Rect (x + w1) y w2 h)
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South -> let (h1, h2) = chop ratio h in (Rect x y w h1, Rect x (y + h1) w h2)
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West -> let (w1, w2) = chop (1 - ratio) w in (Rect (x + w1) y w2 h, Rect x y w1 h)
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North -> let (h1, h2) = chop (1 - ratio) h in (Rect x (y + h1) w h2, Rect x y w h1)
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chop :: Rational -> Integer -> (Integer, Integer)
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chop rat n = let f = ((fromIntegral n) * (numerator rat)) `div` (denominator rat) in
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(f, n - f)
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