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{-# LANGUAGE LambdaCase #-}
module Blessings.String.Extra where
import Blessings
import Control.Arrow ((&&&))
import Data.Char (isPrint,showLitChar)
import Data.Function (on)
import Data.List (groupBy)
quoteSpecials :: Blessings String -> Blessings String
quoteSpecials = \case
Plain s -> quoteSpecials' s
SGR pm x -> SGR pm (quoteSpecials x)
Append a b -> Append (quoteSpecials a) (quoteSpecials b)
Empty -> Empty
quoteSpecials' :: String -> Blessings String
quoteSpecials' s =
mconcat . map (uncurry renderClassifiedString) $ classifiedGroupBy isPrint s
where
renderClassifiedString :: Bool -> String -> Blessings String
renderClassifiedString = \case
True -> printableColor . Plain
False -> unprintableColor . Plain . showLitChar'
(printableColor, unprintableColor) =
(id, SGR [35])
--if hasFocus
--then (color focus colorConfig, color unprintableFocus colorConfig)
--else (color quote colorConfig, color unprintableNormal colorConfig)
showLitChar' :: String -> String
showLitChar' = (>>= f)
where f '\ESC' = "^["
f c = showLitChar c ""
classifiedGroupBy :: Eq b => (a -> b) -> [a] -> [(b, [a])]
classifiedGroupBy f =
map (f . head &&& id) . groupBy ((==) `on` f)
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