{-# OPTIONS -fglasgow-exts #-}
-- Maintainer: Spencer Janssen <sjanssen@cse.unl.edu>
--
-- greedyView is an alternative to standard workspace switching. When a
-- workspace is already visible on another screen, greedyView swaps the
-- contents of that other screen with the current screen.
--
-- To use GreedyView as your default workspace switcher,
--
-- Add this import :
--
-- import XMonadContrib.GreedyView
--
-- And replace the function call used to switch workspaces,
--
-- this :
--
-- [((m .|. modMask, k), f i)
-- | (i, k) <- zip [0 .. fromIntegral workspaces - 1] [xK_1 ..]
-- , (f, m) <- [(view, 0), (shift, shiftMask)]]
--
-- becomes this :
--
-- [((m .|. modMask, k), f i)
-- | (i, k) <- zip [0 .. fromIntegral workspaces - 1] [xK_1 ..]
-- , (f, m) <- [(greedyView, 0), (shift, shiftMask)]]
--
module XMonadContrib.GreedyView (greedyView) where
import StackSet as W hiding (filter)
import XMonad
import Operations
import Data.List (find)
greedyView :: WorkspaceId -> X ()
greedyView = windows . greedyView'
greedyView' :: WorkspaceId -> WindowSet -> WindowSet
greedyView' w ws
| any wTag (hidden ws) = W.view w ws
| (Just s) <- find (wTag . workspace) (visible ws) = ws { current = setScreen s (screen $ current ws)
, visible = setScreen (current ws) (screen s)
: filter (not . wTag . workspace) (visible ws)
}
| otherwise = ws
where
setScreen s i = s { screen = i }
wTag = (w == ) . tag
