-----------------------------------------------------------------------------
-- |
-- Module      :  XMonad.Prompt.Layout
-- Description :  A layout-selection prompt.
-- Copyright   :  (C) 2007 Andrea Rossato, David Roundy
-- License     :  BSD3
--
-- Maintainer  :
-- Stability   :  unstable
-- Portability :  unportable
--
-- A layout-selection prompt for XMonad
--
-----------------------------------------------------------------------------

module XMonad.Prompt.Layout (
                             -- * Usage
                             -- $usage
                             layoutPrompt
                            ) where

import XMonad.Prelude ( sort, nub )
import XMonad hiding ( workspaces )
import XMonad.Prompt
import XMonad.Prompt.Workspace ( Wor(..) )
import XMonad.StackSet ( workspaces, layout )

-- $usage
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Prompt
-- > import XMonad.Prompt.Layout
--
-- >   , ((modm .|. shiftMask, xK_m     ), layoutPrompt def)
--
-- For detailed instruction on editing the key binding see
-- <https://xmonad.org/TUTORIAL.html#customizing-xmonad the tutorial>.
--
-- WARNING: This prompt won't display all possible layouts, because the
-- code to enable this was rejected from xmonad core.  It only displays
-- layouts that are actually in use.  Also, you can only select layouts if
-- you are using NewSelect, rather than the Select defined in xmonad core
-- (which doesn't have this feature).  So all in all, this module is really
-- more a proof-of-principle than something you can actually use
-- productively.

layoutPrompt :: XPConfig -> X ()
layoutPrompt :: XPConfig -> X ()
layoutPrompt XPConfig
c = do [String]
ls <- forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
gets (forall a b. (a -> b) -> [a] -> [b]
map (forall (layout :: * -> *) a.
LayoutClass layout a =>
layout a -> String
description forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall i l a. Workspace i l a -> l
layout) forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
workspaces forall b c a. (b -> c) -> (a -> b) -> a -> c
. XState -> WindowSet
windowset)
                    forall p.
XPrompt p =>
p -> XPConfig -> ComplFunction -> (String -> X ()) -> X ()
mkXPrompt (String -> Wor
Wor String
"") XPConfig
c (XPConfig -> [String] -> ComplFunction
mkComplFunFromList' XPConfig
c forall a b. (a -> b) -> a -> b
$ forall a. Ord a => [a] -> [a]
sort forall a b. (a -> b) -> a -> b
$ forall a. Eq a => [a] -> [a]
nub [String]
ls) (forall a. Message a => a -> X ()
sendMessage forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> JumpToLayout
JumpToLayout)