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|
-----------------------------------------------------------------------------
-- |
-- Module : XMonadContrib.FindEmptyWorkspace
-- Copyright : (c) Miikka Koskinen 2007
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : arcatan@kapsi.fi
--
-----------------------------------------------------------------------------
--
-- Find an empty workspace in xmonad.
--
-- To use, modify your Config.hs to:
--
-- import XMonadContrib.FindEmptyWorkspace
--
-- and add a keybinding:
--
-- , ((modMask, xK_m ), viewEmptyWorkspace)
-- , ((modMask .|. shiftMask, xK_m ), tagToEmptyWorkspace)
--
-- Now you can jump to an empty workspace with mod-n. Mod-shift-n will
-- tag the current window to an empty workspace and view it.
--
module XMonadContrib.FindEmptyWorkspace (
viewEmptyWorkspace, tagToEmptyWorkspace
) where
import Control.Monad.State
import qualified Data.Map as M
import XMonad
import Operations
import qualified StackSet as W
-- | Find the first empty workspace in a WindowSet. Returns Nothing if
-- all workspaces are in use.
findEmptyWorkspace :: WindowSet -> Maybe WorkspaceId
findEmptyWorkspace = findKey (([],[]) ==) . W.stacks
withEmptyWorkspace :: (WorkspaceId -> X ()) -> X ()
withEmptyWorkspace f = do
ws <- gets workspace
whenJust (findEmptyWorkspace ws) f
-- | Find and view an empty workspace. Do nothing if all workspaces are
-- in use.
viewEmptyWorkspace :: X ()
viewEmptyWorkspace = withEmptyWorkspace view
-- | Tag current window to an empty workspace and view it. Do nothing if
-- all workspaces are in use.
tagToEmptyWorkspace :: X ()
tagToEmptyWorkspace = withEmptyWorkspace $ \w -> tag w >> view w
-- Thanks to mauke on #haskell
findKey :: (a -> Bool) -> M.Map k a -> Maybe k
findKey f = M.foldWithKey (\k a -> mplus (if f a then Just k else Nothing)) Nothing
|
