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