201 lines
4.5 KiB
Idris
201 lines
4.5 KiB
Idris
module Quox.Pretty
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import Quox.Name
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import public Text.PrettyPrint.Prettyprinter.Doc
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import Text.PrettyPrint.Prettyprinter.Render.String
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import Text.PrettyPrint.Prettyprinter.Render.Terminal
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import public Data.String
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import Data.DPair
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import public Control.Monad.Identity
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import public Control.Monad.Reader
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import Generics.Derive
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%default total
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%language ElabReflection
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%hide TT.Name
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public export
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record PrettyOpts where
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constructor MakePrettyOpts
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unicode, color : Bool
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public export
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defPrettyOpts : PrettyOpts
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defPrettyOpts = MakePrettyOpts {unicode = True, color = True}
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public export
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data HL
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= Delim
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| Free | TVar | TVarErr
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| Dim | DVar | DVarErr
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| Qty
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| Syntax
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%runElab derive "HL" [Generic, Meta, Eq, Ord, DecEq, Show]
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public export
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data PPrec
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= Outer
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| Ann -- right of "::"
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| AnnL -- left of "::"
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-- ...
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| App -- term/dimension application
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| SApp -- substitution application
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| Arg -- argument to nonfix function
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%runElab derive "PPrec" [Generic, Meta, Eq, Ord, DecEq, Show]
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export %inline
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hl : HL -> Doc HL -> Doc HL
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hl = annotate
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export %inline
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hl' : HL -> Doc HL -> Doc HL
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hl' h = hl h . unAnnotate
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export %inline
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hlF : Functor f => HL -> f (Doc HL) -> f (Doc HL)
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hlF = map . hl
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export %inline
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hlF' : Functor f => HL -> f (Doc HL) -> f (Doc HL)
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hlF' = map . hl'
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export %inline
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parens : Doc HL -> Doc HL
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parens doc = hl Delim "(" <+> doc <+> hl Delim ")"
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export %inline
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parensIf : Bool -> Doc HL -> Doc HL
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parensIf True = parens
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parensIf False = id
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export
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separate' : Doc a -> List (Doc a) -> List (Doc a)
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separate' s [] = []
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separate' s [x] = [x]
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separate' s (x :: xs) = x <+> s :: separate' s xs
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export %inline
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separate : Doc a -> List (Doc a) -> Doc a
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separate s = sep . separate' s
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export %inline
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hseparate : Doc a -> List (Doc a) -> Doc a
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hseparate s = hsep . separate' s
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export %inline
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vseparate : Doc a -> List (Doc a) -> Doc a
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vseparate s = vsep . separate' s
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public export
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record PrettyEnv where
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constructor MakePrettyEnv
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||| names of bound dimension variables
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dnames : List Name
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||| names of bound term variables
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tnames : List Name
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||| use non-ascii characters for syntax
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unicode : Bool
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||| surrounding precedence level
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prec : PPrec
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public export
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HasEnv : (Type -> Type) -> Type
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HasEnv = MonadReader PrettyEnv
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export %inline
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ifUnicode : HasEnv m => (uni, asc : Lazy a) -> m a
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ifUnicode uni asc = if (!ask).unicode then [|uni|] else [|asc|]
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export %inline
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parensIfM : HasEnv m => PPrec -> Doc HL -> m (Doc HL)
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parensIfM d doc = pure $ parensIf ((!ask).prec > d) doc
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export %inline
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withPrec : HasEnv m => PPrec -> m a -> m a
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withPrec d = local {prec := d}
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public export data BinderSort = T | D
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export %inline
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under : HasEnv m => BinderSort -> Name -> m a -> m a
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under T x = local {prec := Outer, tnames $= (x ::)}
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under D x = local {prec := Outer, dnames $= (x ::)}
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public export
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interface PrettyHL a where
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prettyM : HasEnv m => a -> m (Doc HL)
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export %inline
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pretty0M : (PrettyHL a, HasEnv m) => a -> m (Doc HL)
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pretty0M = local {prec := Outer} . prettyM
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export %inline
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pretty0 : PrettyHL a => (unicode : Bool) -> a -> Doc HL
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pretty0 unicode x =
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let env = MakePrettyEnv {dnames = [], tnames = [], unicode, prec = Outer} in
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runReader env $ prettyM x
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export
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(forall a. PrettyHL (f a)) => PrettyHL (Exists f) where
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prettyM x = prettyM x.snd
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export
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PrettyHL a => PrettyHL (Subset a b) where
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prettyM x = prettyM x.fst
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export PrettyHL BaseName where prettyM = pure . pretty . baseStr
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export PrettyHL Name where prettyM = pure . pretty . toDots
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export %inline
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prettyStr : PrettyHL a => (unicode : Bool) -> a -> String
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prettyStr unicode =
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let layout = layoutSmart (MkLayoutOptions (AvailablePerLine 80 0.8)) in
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renderString . layout . pretty0 unicode
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export
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termHL : HL -> AnsiStyle
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termHL Delim = color BrightBlack
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termHL TVar = color BrightYellow
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termHL TVarErr = color BrightYellow <+> underline
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termHL Dim = color BrightGreen <+> bold
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termHL DVar = color BrightGreen
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termHL DVarErr = color BrightGreen <+> underline
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termHL Qty = color BrightMagenta <+> bold
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termHL Free = color BrightWhite
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termHL Syntax = color BrightCyan
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export %inline
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prettyTerm : PrettyOpts -> PrettyHL a => a -> IO Unit
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prettyTerm opts x =
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let reann = if opts.color then map termHL else unAnnotate in
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Terminal.putDoc $ reann $ pretty0 opts.unicode x
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export %inline
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prettyTermDef : PrettyHL a => a -> IO Unit
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prettyTermDef = prettyTerm defPrettyOpts
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infixr 6 <//>
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export %inline
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(<//>) : Doc a -> Doc a -> Doc a
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a <//> b = sep [a, b]
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infixr 6 </>
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export %inline
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(</>) : Doc a -> Doc a -> Doc a
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a </> b = cat [a, b]
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