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{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Layout.PerWorkspace
-- Copyright : (c) Brent Yorgey
-- License : BSD-style (see LICENSE)
--
-- Maintainer : <byorgey@gmail.com>
-- Stability : unstable
-- Portability : unportable
--
-- Configure layouts on a per-workspace basis. NOTE that this module
-- does not (yet) work in conjunction with multiple screens! =(
--
-- Note also that when using PerWorkspace, on initial startup workspaces
-- may not respond to messages properly until a window has been opened.
-- This is due to a limitation inherent in the way PerWorkspace is
-- implemented: it cannot decide which layout to use until actually
-- required to lay out some windows (which does not happen until a window
-- is opened).
-----------------------------------------------------------------------------
module XMonad.Layout.PerWorkspace (
-- * Usage
-- $usage
onWorkspace, onWorkspaces
) where
import XMonad
import qualified XMonad.StackSet as W
import XMonad.Layout.LayoutCombinators
-- $usage
-- You can use this module by importing it into your ~\/.xmonad\/xmonad.hs file:
--
-- > import XMonad.Layout.PerWorkspace
--
-- and modifying your layoutHook as follows (for example):
--
-- > layoutHook = onWorkspace "foo" l1 $ -- layout l1 will be used on workspace "foo".
-- > onWorkspaces ["bar","6"] l2 $ -- layout l2 will be used on workspaces "bar" and "6".
-- > l3 -- layout l3 will be used on all other workspaces.
--
-- Note that @l1@, @l2@, and @l3@ can be arbitrarily complicated layouts,
-- e.g. @(Full ||| smartBorders $ tabbed shrinkText defaultTConf ||| ...)@
--
-- In another scenario, suppose you wanted to have layouts A, B, and C
-- available on all workspaces, except that on workspace foo you want
-- layout D instead of C. You could do that as follows:
--
-- > layoutHook = A ||| B ||| onWorkspace "foo" D C
--
-- NOTE that this module does not (yet) work in conjunction with
-- multiple screens. =(
-- | Specify one layout to use on a particular workspace, and another
-- to use on all others. The second layout can be another call to
-- 'onWorkspace', and so on.
onWorkspace :: WorkspaceId -- ^ tags of workspaces to match
-> (l1 a) -- ^ layout to use on matched workspaces
-> (l2 a) -- ^ layout to use everywhere else
-> CombinedLayout PerWorkspace l1 l2 a
onWorkspace wsId = CombinedLayout (PerWorkspace [wsId])
-- | Specify one layout to use on a particular set of workspaces, and
-- another to use on all other workspaces.
onWorkspaces :: [WorkspaceId] -- ^ tags of workspaces to match
-> (l1 a) -- ^ layout to use on matched workspaces
-> (l2 a) -- ^ layout to use everywhere else
-> CombinedLayout PerWorkspace l1 l2 a
onWorkspaces wsIds = CombinedLayout (PerWorkspace wsIds)
-- | Structure for representing a workspace-specific layout along with
-- a layout for all other workspaces. We store the tags of workspaces
-- to be matched, and the two layouts. Since layouts are stored\/tracked
-- per workspace, once we figure out whether we're on a matched workspace,
-- we can cache that information using a (Maybe Bool). This is necessary
-- to be able to correctly implement the 'description' method of
-- LayoutClass, since a call to description is not able to query the
-- WM state to find out which workspace it was called in.
data PerWorkspace a = PerWorkspace [WorkspaceId] deriving (Read, Show)
instance LayoutCombinator PerWorkspace a where
chooser (PerWorkspace wsIds) = do
t <- getCurrentTag
return $ if t `elem` wsIds then DoFirst else DoSecond
-- | Get the tag of the currently active workspace. Note that this
-- is only guaranteed to be the same workspace for which doLayout
-- was called if there is only one screen.
getCurrentTag :: X WorkspaceId
getCurrentTag = gets windowset >>= return . W.tag . W.workspace . W.current
|
