{-
This module is part of Chatty.
Copyleft (c) 2014 Marvin Cohrs
All wrongs reversed. Sharing is an act of love, not crime.
Please share Antisplice with everyone you like.
Chatty is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Chatty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with Chatty. If not, see .
-}
-- | Provides an ExtendedPrinter that handles colours using standardized ANSI codes.
module Text.Chatty.Extended.ANSI where
import qualified System.Console.ANSI as A
import Control.Monad.Trans.Class
import Control.Monad.IO.Class
import Text.Chatty.Printer
import Text.Chatty.Extended.Printer
-- | An ExtendedPrinter that uses ANSI colour codes.
newtype AnsiPrinterT m a = AnsiPrinter { runAnsiPrinterT :: [Colour] -> m (a,[Colour]) }
instance Monad m => Monad (AnsiPrinterT m) where
return a = AnsiPrinter $ \s -> return (a,s)
(AnsiPrinter p) >>= f = AnsiPrinter $ \s -> do (a,s') <- p s; runAnsiPrinterT (f a) s'
instance MonadTrans AnsiPrinterT where
lift m = AnsiPrinter $ \c -> do a <- m; return (a,c)
instance Monad m => Functor (AnsiPrinterT m) where
fmap f a = AnsiPrinter $ \s -> do (a',s') <- runAnsiPrinterT a s; return (f a',s')
instance MonadIO m => MonadIO (AnsiPrinterT m) where
liftIO = lift . liftIO
instance MonadPrinter m => MonadPrinter (AnsiPrinterT m) where
mprint = lift . mprint
mnoecho = lift . mnoecho
mflush = lift mflush
instance MonadPrinter m => ExtendedPrinter (AnsiPrinterT m) where
estart c = AnsiPrinter $ \c1 -> do
mprint $ A.setSGRCode [A.SetColor A.Foreground (mkColourInt c) (mkColourCode c)]
return ((),c:c1)
efin = AnsiPrinter $ \c1 ->
case c1 of
(_:c:cx) -> do
mprint $ A.setSGRCode [A.SetColor A.Foreground (mkColourInt c) (mkColourCode c)]
return ((),c:cx)
_ -> do
mprint $ A.setSGRCode [A.Reset]
return ((),[])
-- | Convert Chatty's colour intensity to ansi-terminal's one
mkColourInt (Dull _) = A.Dull
mkColourInt (Vivid _) = A.Vivid
-- | Convert Chatty's colour tone to ansi-terminal's one
mkColourCode (Dull c) = mkColourCode (Vivid c)
mkColourCode (Vivid c) = case c of
Green -> A.Green
Red -> A.Red
Yellow -> A.Yellow
Blue -> A.Blue
Black -> A.Black
White -> A.White
Cyan -> A.Cyan
Magenta -> A.Magenta