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-rw-r--r--src/Blessings/String/Extra.hs41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/Blessings/String/Extra.hs b/src/Blessings/String/Extra.hs
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+++ b/src/Blessings/String/Extra.hs
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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)