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Diffstat (limited to '')
| -rw-r--r-- | XMonad/Layout/PerScreen.hs | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/XMonad/Layout/PerScreen.hs b/XMonad/Layout/PerScreen.hs new file mode 100644 index 0000000..b062dc4 --- /dev/null +++ b/XMonad/Layout/PerScreen.hs @@ -0,0 +1,74 @@ +{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-} + +----------------------------------------------------------------------------- +-- | +-- Module : XMonad.Layout.PerScreen +-- Copyright : (c) Edward Z. Yang +-- License : BSD-style (see LICENSE) +-- +-- Maintainer : <ezyang@cs.stanford.edu> +-- Stability : unstable +-- Portability : unportable +-- +-- Configure layouts based on the width of your screen; use your +-- favorite multi-column layout for wide screens and a full-screen +-- layout for small ones. +----------------------------------------------------------------------------- + +module XMonad.Layout.PerScreen + ( -- * Usage + -- $usage + PerScreen, + ifWider + ) where + +import XMonad +import qualified XMonad.StackSet as W + +import Data.Maybe (fromMaybe) + +-- $usage +-- You can use this module by importing it into your ~\/.xmonad\/xmonad.hs file: +-- +-- > import XMonad.Layout.PerScreen +-- +-- and modifying your layoutHook as follows (for example): +-- +-- > layoutHook = ifWider 1280 (Tall 1 (3/100) (1/2) ||| Full) Full +-- +-- Replace any of the layouts with any arbitrarily complicated layout. +-- ifWider can also be used inside other layout combinators. + +ifWider :: (LayoutClass l1 a, LayoutClass l2 a) + => Dimension -- ^ target screen width + -> (l1 a) -- ^ layout to use when the screen is wide enough + -> (l2 a) -- ^ layout to use otherwise + -> PerScreen l1 l2 a +ifWider w = PerScreen w False + +data PerScreen l1 l2 a = PerScreen Dimension Bool (l1 a) (l2 a) deriving (Read, Show) + +-- | Construct new PerScreen values with possibly modified layouts. +mkNewPerScreenT :: PerScreen l1 l2 a -> Maybe (l1 a) -> + PerScreen l1 l2 a +mkNewPerScreenT (PerScreen w _ lt lf) mlt' = + (\lt' -> PerScreen w True lt' lf) $ fromMaybe lt mlt' + +mkNewPerScreenF :: PerScreen l1 l2 a -> Maybe (l2 a) -> + PerScreen l1 l2 a +mkNewPerScreenF (PerScreen w _ lt lf) mlf' = + (\lf' -> PerScreen w False lt lf') $ fromMaybe lf mlf' + +instance (LayoutClass l1 a, LayoutClass l2 a, Show a) => LayoutClass (PerScreen l1 l2) a where + runLayout (W.Workspace i p@(PerScreen w _ lt lf) ms) r + | rect_width r > w = do (wrs, mlt') <- runLayout (W.Workspace i lt ms) r + return (wrs, Just $ mkNewPerScreenT p mlt') + | otherwise = do (wrs, mlt') <- runLayout (W.Workspace i lf ms) r + return (wrs, Just $ mkNewPerScreenF p mlt') + + handleMessage (PerScreen w bool lt lf) m + | bool = handleMessage lt m >>= maybe (return Nothing) (\nt -> return . Just $ PerScreen w bool nt lf) + | otherwise = handleMessage lf m >>= maybe (return Nothing) (\nf -> return . Just $ PerScreen w bool lt nf) + + description (PerScreen _ True l1 _) = description l1 + description (PerScreen _ _ _ l2) = description l2 |