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-----------------------------------------------------------------------------
-- |
-- Module      :  XMonad.Prompt.Theme
-- Copyright   :  (C) 2007 Andrea Rossato
-- License     :  BSD3
--
-- Maintainer  :  andrea.rossato@unibz.it
-- Stability   :  unstable
-- Portability :  unportable
--
-- A prompt for changing the theme of the current workspace
-----------------------------------------------------------------------------

module XMonad.Prompt.Theme
    ( -- * Usage
      -- $usage
      themePrompt,
      ThemePrompt,
    ) where

import Control.Arrow ( (&&&) )
import qualified Data.Map as M
import Data.Maybe ( fromMaybe )
import XMonad
import XMonad.Prompt
import XMonad.Layout.Decoration
import XMonad.Util.Themes

-- $usage
-- You can use this module with the following in your
-- @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Prompt
-- > import XMonad.Prompt.Theme
--
-- in your keybindings add:
--
-- >   , ((modm .|. controlMask, xK_t), themePrompt def)
--
-- For detailed instruction on editing the key binding see
-- "XMonad.Doc.Extending#Editing_key_bindings".

data ThemePrompt = ThemePrompt

instance XPrompt ThemePrompt where
    showXPrompt ThemePrompt = "Select a theme: "
    commandToComplete _ c = c
    nextCompletion      _ = getNextCompletion

themePrompt :: XPConfig -> X ()
themePrompt c = mkXPrompt ThemePrompt c (mkComplFunFromList' . map ppThemeInfo $ listOfThemes) changeTheme
    where changeTheme t = sendMessage . SetTheme . fromMaybe def $ M.lookup t mapOfThemes

mapOfThemes :: M.Map String Theme
mapOfThemes = M.fromList . uncurry zip . (map ppThemeInfo &&& map theme) $ listOfThemes