module Text.Trifecta.Diagnostic.Rendering.Span
( Span(..)
, span
, Spanned(..)
, spanned
, spanEffects
, drawSpan
, addSpan
) where
import Control.Applicative
import Data.Hashable
import Data.Semigroup
import Data.Semigroup.Reducer
import Data.Foldable
import Data.Traversable
import Control.Comonad
import Data.ByteString (ByteString)
import Text.Trifecta.Rope.Bytes
import Text.Trifecta.Rope.Delta
import Text.Trifecta.Diagnostic.Rendering.Prim
import Text.Trifecta.Util.Combinators
import Text.Trifecta.Parser.Class
import Data.Array
import System.Console.Terminfo.Color
import System.Console.Terminfo.PrettyPrint
import Prelude as P hiding (span)
spanEffects :: [ScopedEffect]
spanEffects = [soft (Foreground Green)]
drawSpan :: Delta -> Delta -> Delta -> Lines -> Lines
drawSpan s e d a
| nl && nh = go (column l) (rep (max (column h column l) 0) '~') a
| nl = go (column l) (rep (max (snd (snd (bounds a)) column l + 1) 0) '~') a
| nh = go (1) (rep (max (column h + 1) 0) '~') a
| otherwise = a
where
go = draw spanEffects 1 . fromIntegral
l = argmin bytes s e
h = argmax bytes s e
nl = near l d
nh = near h d
rep = P.replicate . fromIntegral
addSpan :: Delta -> Delta -> Rendering -> Rendering
addSpan s e r = drawSpan s e .# r
data Span = Span !Delta !Delta !ByteString deriving (Eq,Ord,Show)
instance Renderable Span where
render (Span s e bs) = addSpan s e $ rendering s bs
instance Semigroup Span where
Span s _ b <> Span _ e _ = Span s e b
instance Reducer Span Rendering where
unit = render
data Spanned a = a :~ Span deriving (Eq,Ord,Show)
instance Functor Spanned where
fmap f (a :~ s) = f a :~ s
instance Comonad Spanned where
extend f as@(_ :~ s) = f as :~ s
extract (a :~ _) = a
instance Foldable Spanned where
foldMap f (a :~ _) = f a
instance Traversable Spanned where
traverse f (a :~ s) = (:~ s) <$> f a
instance Reducer (Spanned a) Rendering where
unit = render
instance Renderable (Spanned a) where
render (_ :~ s) = render s
instance Hashable Span where
hash (Span s e bs) = hash s `hashWithSalt` e `hashWithSalt` bs
instance Hashable a => Hashable (Spanned a) where
hash (a :~ s) = hash a `hashWithSalt` s
span :: MonadParser m => m a -> m Span
span p = (\s l e -> Span s e l) <$> position <*> line <*> (p *> position)
spanned :: MonadParser m => m a -> m (Spanned a)
spanned p = (\s l a e -> a :~ Span s e l) <$> position <*> line <*> p <*> position