xmonad-contrib/XMonad/Layout/SortedLayout.hs
slotThe 78d526d1dd Get rid of unused imports
Starting with 5240116f3cdf169e3aa226d9f8206a5f5b99c867 we only support
GHC versions 8.4.4 and up (more precisely, the GHC version associated
with stackage lts-12 and up).  The imports in question are now in
Prelude and need not be imported explicitly.
2020-12-14 13:41:28 +01:00

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Haskell

{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeSynonymInstances #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Layout.SortedLayout
-- Copyright : (c) 2016 Kurt Dietrich
-- License : BSD-style (see xmonad/LICENSE)
--
-- Maintainer : kurto@mac.com
-- Stability : unstable
-- Portability : unportable
--
-- A 'LayoutModifier' that sorts the windows in another layout, given a
-- list of properties. The order of properties in the list determines
-- the order of windows in the final layout. Any unmatched windows
-- go to the end of the order.
-----------------------------------------------------------------------------
module XMonad.Layout.SortedLayout
( -- *Usage:
-- $usage
sorted
, Property(..)
) where
import Control.Monad
import Data.List
import XMonad
import XMonad.Layout.LayoutModifier
import XMonad.StackSet as W
import XMonad.Util.WindowProperties
-- $usage
-- You can use this module with the following in your
-- @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Layout.SortedLayout
--
-- Then edit your @layoutHook@ to sort another layout (in this case, 'XMonad.Layout.Grid.Grid'):
--
-- > myLayout = sorted [ClassName "Firefox", ClassName "URxvt"] Grid
-- > main = xmonad def { layoutHook = myLayout }
--
-- For more detailed instructions on editing the layoutHook see:
--
-- "XMonad.Doc.Extending#Editing_the_layout_hook"
-- | Modify a layout using a list of properties to sort its windows.
sorted :: [Property]
-> l a
-> ModifiedLayout SortedLayout l a
sorted props = ModifiedLayout . SortedLayout $ props ++ [Const True]
data WindowDescriptor = WindowDescriptor { wdSeqn :: !Integer
, wdProp :: !Property
, wdId :: !Window
} deriving (Show, Read)
instance Eq WindowDescriptor where
(==) a b = wdId a == wdId b
instance Ord WindowDescriptor where
compare a b = compare (wdSeqn a) (wdSeqn b)
data SortedLayout a = SortedLayout [Property] deriving (Show, Read)
instance LayoutModifier SortedLayout Window where
modifyLayout (SortedLayout props) = sortLayout props
modifierDescription _ = "Sorted"
findMatchingWindows :: Integer -> Property -> [Window] -> X [WindowDescriptor]
findMatchingWindows seqn prop wids = fmap (fmap (WindowDescriptor seqn prop)) matching where
matching = filterM (hasProperty prop) wids
sortLayout :: (LayoutClass l Window)
=> [Property]
-> W.Workspace WorkspaceId (l Window) Window
-> Rectangle
-> X ([(Window, Rectangle)], Maybe (l Window))
sortLayout props (W.Workspace w l r) rect = do
let wids = W.integrate' r
sortedWids <- map wdId . nub . sort . concat <$> zipWithM (\s p -> findMatchingWindows s p wids) [0..] props
let sr = W.differentiate sortedWids
runLayout (W.Workspace w l sr) rect