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------------------------------------------------------------------------------
-- |
-- Module: Xmobar.Text.Ansi
-- Copyright: (c) 2022 Jose Antonio Ortega Ruiz
-- License: BSD3-style (see LICENSE)
--
-- Maintainer: jao@gnu.org
-- Stability: unstable
-- Portability: portable
-- Created: Fri Feb 4, 2022 01:10
--
--
-- Codification with ANSI (color) escape codes
--
------------------------------------------------------------------------------
module Xmobar.Text.Ansi (withAnsiColor) where
import Data.List (intercalate)
asInt :: String -> String
asInt x = case (reads $ "0x" ++ x) :: [(Integer, String)] of
[(v, "") ] -> show v
_ -> ""
namedColor :: String -> String
namedColor c =
case c of
"black" -> "0"; "red" -> "1"; "green" -> "2"; "yellow" -> "3"; "blue" -> "4";
"magenta" -> "5"; "cyan" -> "6"; "white" -> "7"; _ -> ""
ansiCode :: String -> String
ansiCode ('#':r:g:[b]) = ansiCode ['#', '0', r, '0', g, '0', b]
ansiCode ('#':r0:r1:g0:g1:b0:[b1]) =
"2;" ++ intercalate ";" (map asInt [[r0,r1], [g0,g1], [b0,b1]])
ansiCode ('#':n) = ansiCode n
ansiCode c = "5;" ++ if null i then namedColor c else i where i = asInt c
withAnsiColor :: (String, String) -> String -> String
withAnsiColor (fg, bg) s = wrap "38;" fg (wrap "48;" bg s)
where wrap cd cl w =
if null cl
then w
else "\x1b[" ++ cd ++ ansiCode cl ++ "m" ++ w ++ "\x1b[0m"
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