From 8b8380e18b70352c5e233635d34139b17539b001 Mon Sep 17 00:00:00 2001 From: Spencer Janssen Date: Thu, 1 Nov 2007 19:08:46 +0100 Subject: Hierarchify darcs-hash:20071101180846-a5988-25ba1c9ce37a35c1533e4075cc9494c6f7dd5ade --- Layouts.hs | 175 ------------------------------------------------------------- 1 file changed, 175 deletions(-) delete mode 100644 Layouts.hs (limited to 'Layouts.hs') diff --git a/Layouts.hs b/Layouts.hs deleted file mode 100644 index 30c70ea..0000000 --- a/Layouts.hs +++ /dev/null @@ -1,175 +0,0 @@ -{-# OPTIONS_GHC -fglasgow-exts #-} -- For deriving Data/Typeable -{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses, PatternGuards, TypeSynonymInstances #-} - --- -------------------------------------------------------------------------- --- | --- Module : Layouts.hs --- Copyright : (c) Spencer Janssen 2007 --- License : BSD3-style (see LICENSE) --- --- Maintainer : sjanssen@cse.unl.edu --- Stability : unstable --- Portability : not portable, Typeable deriving, mtl, posix --- --- The collection of core layouts. --- ------------------------------------------------------------------------------ - -module Layouts (ChangeLayout(..), Choose, (|||), Resize(..), IncMasterN(..), - Full(..), Tall(..), Mirror(..), mirrorRect, splitVertically, - splitHorizontally, splitHorizontallyBy, splitVerticallyBy) where - -import XMonad - -import Graphics.X11 (Rectangle(..)) -import qualified StackSet as W -import Control.Arrow ((***), second) -import Control.Monad -import Data.Maybe (fromMaybe) - - ------------------------------------------------------------------------- --- LayoutClass selection manager - --- | A layout that allows users to switch between various layout options. - --- | Messages to change the current layout. -data ChangeLayout = FirstLayout | NextLayout deriving (Eq, Show, Typeable) - -instance Message ChangeLayout - --- | The layout choice combinator -(|||) :: (LayoutClass l a, LayoutClass r a) => l a -> r a -> Choose l r a -(|||) = flip SLeft -infixr 5 ||| - -data Choose l r a = SLeft (r a) (l a) - | SRight (l a) (r a) deriving (Read, Show) - -data NextNoWrap = NextNoWrap deriving (Eq, Show, Typeable) -instance Message NextNoWrap - --- This has lots of pseudo duplicated code, we must find a better way -instance (LayoutClass l a, LayoutClass r a) => LayoutClass (Choose l r) a where - doLayout (SLeft r l) = (fmap (second . fmap $ SLeft r) .) . doLayout l - doLayout (SRight l r) = (fmap (second . fmap $ SRight l) .) . doLayout r - - description (SLeft _ l) = description l - description (SRight _ r) = description r - - handleMessage lr m | Just FirstLayout <- fromMessage m = case lr of - SLeft {} -> return Nothing - SRight l r -> fmap (Just . flip SLeft l . fromMaybe r) - $ handleMessage r (SomeMessage Hide) - - handleMessage lr m | Just NextLayout <- fromMessage m = do - mlr <- handleMessage lr $ SomeMessage NextNoWrap - maybe (handleMessage lr $ SomeMessage FirstLayout) (return . Just) mlr - - handleMessage (SLeft r l) m | Just NextNoWrap <- fromMessage m = do - handleMessage l (SomeMessage Hide) - mr <- handleMessage r (SomeMessage FirstLayout) - return . Just . SRight l $ fromMaybe r mr - - handleMessage lr m | Just ReleaseResources <- fromMessage m = - liftM2 ((Just .) . cons) - (fmap (fromMaybe l) $ handleMessage l m) - (fmap (fromMaybe r) $ handleMessage r m) - where (cons, l, r) = case lr of - (SLeft r l) -> (flip SLeft, l, r) - (SRight l r) -> (SRight, l, r) - - -- The default cases for left and right: - handleMessage (SLeft r l) m = fmap (fmap $ SLeft r) $ handleMessage l m - handleMessage (SRight l r) m = fmap (fmap $ SRight l) $ handleMessage r m - --- --- | Builtin layout algorithms: --- --- > fullscreen mode --- > tall mode --- --- The latter algorithms support the following operations: --- --- > Shrink --- > Expand --- -data Resize = Shrink | Expand deriving Typeable - --- | You can also increase the number of clients in the master pane -data IncMasterN = IncMasterN Int deriving Typeable - -instance Message Resize -instance Message IncMasterN - --- | Simple fullscreen mode, just render all windows fullscreen. -data Full a = Full deriving (Show, Read) - -instance LayoutClass Full a - --- | The inbuilt tiling mode of xmonad, and its operations. -data Tall a = Tall Int Rational Rational deriving (Show, Read) - -instance LayoutClass Tall a where - pureLayout (Tall nmaster _ frac) r s = zip ws rs - where ws = W.integrate s - rs = tile frac r nmaster (length ws) - - pureMessage (Tall nmaster delta frac) m = msum [fmap resize (fromMessage m) - ,fmap incmastern (fromMessage m)] - where resize Shrink = Tall nmaster delta (max 0 $ frac-delta) - resize Expand = Tall nmaster delta (min 1 $ frac+delta) - incmastern (IncMasterN d) = Tall (max 0 (nmaster+d)) delta frac - description _ = "Tall" - --- | Mirror a rectangle -mirrorRect :: Rectangle -> Rectangle -mirrorRect (Rectangle rx ry rw rh) = (Rectangle ry rx rh rw) - --- | Mirror a layout, compute its 90 degree rotated form. -data Mirror l a = Mirror (l a) deriving (Show, Read) - -instance LayoutClass l a => LayoutClass (Mirror l) a where - doLayout (Mirror l) r s = (map (second mirrorRect) *** fmap Mirror) - `fmap` doLayout l (mirrorRect r) s - handleMessage (Mirror l) = fmap (fmap Mirror) . handleMessage l - description (Mirror l) = "Mirror "++ description l - --- | tile. Compute the positions for windows using the default 2 pane tiling algorithm. --- --- The screen is divided (currently) into two panes. all clients are --- then partioned between these two panes. one pane, the `master', by --- convention has the least number of windows in it (by default, 1). --- the variable `nmaster' controls how many windows are rendered in the --- master pane. --- --- `delta' specifies the ratio of the screen to resize by. --- --- 'frac' specifies what proportion of the screen to devote to the --- master area. --- -tile :: Rational -> Rectangle -> Int -> Int -> [Rectangle] -tile f r nmaster n = if n <= nmaster || nmaster == 0 - then splitVertically n r - else splitVertically nmaster r1 ++ splitVertically (n-nmaster) r2 -- two columns - where (r1,r2) = splitHorizontallyBy f r - --- --- Divide the screen vertically into n subrectangles --- -splitVertically, splitHorizontally :: Int -> Rectangle -> [Rectangle] -splitVertically n r | n < 2 = [r] -splitVertically n (Rectangle sx sy sw sh) = Rectangle sx sy sw smallh : - splitVertically (n-1) (Rectangle sx (sy+fromIntegral smallh) sw (sh-smallh)) - where smallh = sh `div` fromIntegral n --hmm, this is a fold or map. - -splitHorizontally n = map mirrorRect . splitVertically n . mirrorRect - --- Divide the screen into two rectangles, using a rational to specify the ratio -splitHorizontallyBy, splitVerticallyBy :: RealFrac r => r -> Rectangle -> (Rectangle, Rectangle) -splitHorizontallyBy f (Rectangle sx sy sw sh) = - ( Rectangle sx sy leftw sh - , Rectangle (sx + fromIntegral leftw) sy (sw-fromIntegral leftw) sh) - where leftw = floor $ fromIntegral sw * f - -splitVerticallyBy f = (mirrorRect *** mirrorRect) . splitHorizontallyBy f . mirrorRect -- cgit v1.2.3