hledger/hledger-lib/Hledger/Utils/Color.hs
2021-06-07 17:33:54 -10:00

36 lines
1.3 KiB
Haskell

-- | Basic color helpers for prettifying console output.
module Hledger.Utils.Color
(
color,
bgColor,
colorB,
bgColorB,
Color(..),
ColorIntensity(..)
)
where
import qualified Data.Text.Lazy.Builder as TB
import System.Console.ANSI
import Hledger.Utils.Text (WideBuilder(..))
-- | Wrap a string in ANSI codes to set and reset foreground colour.
color :: ColorIntensity -> Color -> String -> String
color int col s = setSGRCode [SetColor Foreground int col] ++ s ++ setSGRCode []
-- | Wrap a string in ANSI codes to set and reset background colour.
bgColor :: ColorIntensity -> Color -> String -> String
bgColor int col s = setSGRCode [SetColor Background int col] ++ s ++ setSGRCode []
-- | Wrap a WideBuilder in ANSI codes to set and reset foreground colour.
colorB :: ColorIntensity -> Color -> WideBuilder -> WideBuilder
colorB int col (WideBuilder s w) =
WideBuilder (TB.fromString (setSGRCode [SetColor Foreground int col]) <> s <> TB.fromString (setSGRCode [])) w
-- | Wrap a WideBuilder in ANSI codes to set and reset background colour.
bgColorB :: ColorIntensity -> Color -> WideBuilder -> WideBuilder
bgColorB int col (WideBuilder s w) =
WideBuilder (TB.fromString (setSGRCode [SetColor Background int col]) <> s <> TB.fromString (setSGRCode [])) w