module Main where import Control.Arrow (second) import Rainbow import qualified Data.ByteString as BS effects :: [(String, Chunk a -> Chunk a)] effects = [ ("bold", bold) , ("faint", faint) , ("italic", italic) , ("underline", underline) , ("blink", blink) , ("inverse", inverse) , ("invisible", invisible) , ("strikeout", strikeout) ] colors :: [(String, Radiant)] colors = [ ("(no color)", mempty) , ("black", black) , ("red", red) , ("green", green) , ("yellow", yellow) , ("blue", blue) , ("magenta", magenta) , ("cyan", cyan) , ("white", white) ] maybeEffects :: [(String, Maybe (Chunk a -> Chunk a))] maybeEffects = ("(no effect)", Nothing) : map (second Just) effects {- -- From -- http://stackoverflow.com/a/22577148/1017252 combinations :: Int -> [a] -> [[a]] combinations k xs = combinations' (length xs) k xs where combinations' n k' l@(y:ys) | k' == 0 = [[]] | k' >= n = [l] | null l = [] | otherwise = map (y :) (combinations' (n - 1) (k' - 1) ys) ++ combinations' (n - 1) k' ys -} colorsAndEffects :: [[Chunk String]] colorsAndEffects = do (fgColorName, fgColor) <- colors (bgColorName, bgColor) <- colors (effectName, mayEffect) <- maybeEffects let lbl = "foreground " ++ fgColorName ++ " background " ++ bgColorName ++ " effect " ++ effectName return $ [ chunk lbl & fore fgColor & back bgColor & maybe id id mayEffect , chunk "\n" ] main :: IO () main = mapM_ BS.putStr . chunksToByteStrings toByteStringsColors8 . concat $ colorsAndEffects