    -----------------------------------------------------------------------------
    -- |
    -- 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 defaultXPConfig)
    --
    -- 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 defaultTheme $ M.lookup t mapOfThemes

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