quox/lib/Quox/Pretty.idr

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module Quox.Pretty
import Quox.Loc
import Quox.Name
import Control.Monad.ST.Extra
import public Text.PrettyPrint.Bernardy
import public Text.PrettyPrint.Bernardy.Core.Decorate
import public Quox.EffExtra
import public Data.String
import Control.ANSI.SGR
import Data.DPair
import Data.SnocList
import Derive.Prelude
%default total
%language ElabReflection
%hide TT.Name
public export
data PPrec
= Outer
| Times -- "_ × _"
| InTimes -- arguments of ×
| AnnL -- left of "∷"
| Eq -- "_ ≡ _ : _"
| InEq -- arguments of ≡
-- ...
| App -- term/dimension application
| Arg -- argument to nonfix function
%runElab derive "PPrec" [Eq, Ord, Show]
public export
data HL
= Delim
| Free | TVar | TVarErr
| Dim | DVar | DVarErr
| Qty | Universe
| Syntax
| Tag
%runElab derive "HL" [Eq, Ord, Show]
public export
data Flavor = Unicode | Ascii
%runElab derive "Flavor" [Eq, Ord, Show]
export %inline
noHighlight : HL -> Highlight
noHighlight _ = MkHighlight "" ""
public export
data EffTag = PREC | FLAVOR | HIGHLIGHT | INDENT
public export
Pretty : List (Type -> Type)
Pretty = [StateL PREC PPrec, ReaderL FLAVOR Flavor,
ReaderL HIGHLIGHT (HL -> Highlight), ReaderL INDENT Nat]
export %inline
runPrettyWith : PPrec -> Flavor -> (HL -> Highlight) -> Nat ->
Eff Pretty a -> a
runPrettyWith prec flavor highlight indent act =
runST $ do
runEff act $ with Union.(::)
[handleStateSTRef !(newSTRef prec),
handleReaderConst flavor,
handleReaderConst highlight,
handleReaderConst indent]
export %inline
toSGR : HL -> List SGR
toSGR Delim = []
toSGR Free = [SetForeground BrightBlue]
toSGR TVar = [SetForeground BrightYellow]
toSGR TVarErr = [SetForeground BrightYellow, SetStyle SingleUnderline]
toSGR Dim = [SetForeground BrightGreen]
toSGR DVar = [SetForeground BrightGreen]
toSGR DVarErr = [SetForeground BrightGreen, SetStyle SingleUnderline]
toSGR Qty = [SetForeground BrightMagenta]
toSGR Universe = [SetForeground BrightRed]
toSGR Syntax = [SetForeground BrightCyan]
toSGR Tag = [SetForeground BrightRed]
export %inline
highlightSGR : HL -> Highlight
highlightSGR h = MkHighlight (escapeSGR $ toSGR h) (escapeSGR [Reset])
export %inline
runPretty : Eff Pretty a -> a
runPretty = runPrettyWith Outer Unicode noHighlight 2
export %inline
runPrettyColor : Eff Pretty a -> a
runPrettyColor = runPrettyWith Outer Unicode highlightSGR 2
export %inline
hl : {opts : LayoutOpts} -> HL -> Doc opts -> Eff Pretty (Doc opts)
hl h doc = asksAt HIGHLIGHT $ \f => decorate (f h) doc
export %inline
indentD : {opts : LayoutOpts} -> Doc opts -> Eff Pretty (Doc opts)
indentD doc = pure $ indent !(askAt INDENT) doc
export %inline
hangD : {opts : LayoutOpts} -> Doc opts -> Doc opts -> Eff Pretty (Doc opts)
hangD d1 d2 = pure $ hangSep !(askAt INDENT) d1 d2
export %inline
hangSingle : {opts : LayoutOpts} -> Nat -> Doc opts -> Doc opts -> Doc opts
hangSingle n d1 d2 = ifMultiline (d1 <++> d2) (vappend d1 (indent n d2))
export %inline
hangDSingle : {opts : LayoutOpts} -> Doc opts -> Doc opts ->
Eff Pretty (Doc opts)
hangDSingle d1 d2 = pure $ hangSingle !(askAt INDENT) d1 d2
export
tightDelims : {opts : LayoutOpts} -> (l, r : String) -> (inner : Doc opts) ->
Eff Pretty (Doc opts)
tightDelims l r inner = do
l <- hl Delim $ text l
r <- hl Delim $ text r
pure $ hcat [l, inner, r]
export
looseDelims : {opts : LayoutOpts} -> (l, r : String) -> (inner : Doc opts) ->
Eff Pretty (Doc opts)
looseDelims l r inner = do
l <- hl Delim $ text l
r <- hl Delim $ text r
let short = hsep [l, inner, r]
long = vsep [l, !(indentD inner), r]
pure $ ifMultiline short long
export %inline
parens : {opts : LayoutOpts} -> Doc opts -> Eff Pretty (Doc opts)
parens = tightDelims "(" ")"
export %inline
bracks : {opts : LayoutOpts} -> Doc opts -> Eff Pretty (Doc opts)
bracks = tightDelims "[" "]"
export %inline
braces : {opts : LayoutOpts} -> Doc opts -> Eff Pretty (Doc opts)
braces = looseDelims "{" "}"
export %inline
tightBraces : {opts : LayoutOpts} -> Doc opts -> Eff Pretty (Doc opts)
tightBraces = tightDelims "{" "}"
export %inline
parensIf : {opts : LayoutOpts} -> Bool -> Doc opts -> Eff Pretty (Doc opts)
parensIf True = parens
parensIf False = pure
||| uses hsep only if the whole list fits on one line
export
sepSingle : {opts : LayoutOpts} -> List (Doc opts) -> Doc opts
sepSingle xs = ifMultiline (hsep xs) (vsep xs)
export
fillSep : {opts : LayoutOpts} -> List (Doc opts) -> Doc opts
fillSep [] = empty
fillSep (x :: xs) = foldl (\x, y => sep [x, y]) x xs
export
exceptLast : {opts : LayoutOpts} -> (Doc opts -> Doc opts) ->
List (Doc opts) -> List (Doc opts)
exceptLast f [] = []
exceptLast f [x] = [x]
exceptLast f (x :: xs) = f x :: exceptLast f xs
parameters {opts : LayoutOpts} {auto _ : Foldable t}
export
separateLoose : Doc opts -> t (Doc opts) -> Doc opts
separateLoose d = sep . exceptLast (<++> d) . toList
export
separateTight : Doc opts -> t (Doc opts) -> Doc opts
separateTight d = sep . exceptLast (<+> d) . toList
export
hseparateTight : Doc opts -> t (Doc opts) -> Doc opts
hseparateTight d = hsep . exceptLast (<+> d) . toList
export
vseparateTight : Doc opts -> t (Doc opts) -> Doc opts
vseparateTight d = vsep . exceptLast (<+> d) . toList
export
fillSeparateTight : Doc opts -> t (Doc opts) -> Doc opts
fillSeparateTight d = fillSep . exceptLast (<+> d) . toList
export %inline
pshow : {opts : LayoutOpts} -> Show a => a -> Doc opts
pshow = text . show
export %inline
ifUnicode : (uni, asc : Lazy a) -> Eff Pretty a
ifUnicode uni asc =
asksAt FLAVOR $ \case
Unicode => uni
Ascii => asc
export %inline
parensIfM : {opts : LayoutOpts} -> PPrec -> Doc opts -> Eff Pretty (Doc opts)
parensIfM d doc = parensIf (!(getAt PREC) > d) doc
export %inline
withPrec : PPrec -> Eff Pretty a -> Eff Pretty a
withPrec = localAt_ PREC
export
prettyName : Name -> Doc opts
prettyName = text . toDots
export
prettyFree : {opts : LayoutOpts} -> Name -> Eff Pretty (Doc opts)
prettyFree = hl Free . prettyName
export
prettyBind' : BindName -> Doc opts
prettyBind' = text . baseStr . val
export
prettyTBind : {opts : LayoutOpts} -> BindName -> Eff Pretty (Doc opts)
prettyTBind = hl TVar . prettyBind'
export
prettyDBind : {opts : LayoutOpts} -> BindName -> Eff Pretty (Doc opts)
prettyDBind = hl DVar . prettyBind'
export %inline
typeD, arrowD, darrowD, timesD, lamD, eqndD, dlamD, annD, natD,
eqD, colonD, commaD, semiD, caseD, typecaseD, returnD,
ofD, dotD, zeroD, succD, coeD, compD, undD, cstD, pipeD, fstD, sndD :
{opts : LayoutOpts} -> Eff Pretty (Doc opts)
typeD = hl Syntax . text =<< ifUnicode "" "Type"
arrowD = hl Delim . text =<< ifUnicode "" "->"
darrowD = hl Delim . text =<< ifUnicode "" "=>"
timesD = hl Delim . text =<< ifUnicode "×" "**"
lamD = hl Syntax . text =<< ifUnicode "λ" "fun"
eqndD = hl Delim . text =<< ifUnicode "" "=="
dlamD = hl Syntax . text =<< ifUnicode "δ" "dfun"
annD = hl Delim . text =<< ifUnicode "" "::"
natD = hl Syntax . text =<< ifUnicode "" "Nat"
eqD = hl Syntax $ text "Eq"
colonD = hl Delim $ text ":"
commaD = hl Delim $ text ","
semiD = hl Delim $ text ";"
caseD = hl Syntax $ text "case"
typecaseD = hl Syntax $ text "type-case"
ofD = hl Syntax $ text "of"
returnD = hl Syntax $ text "return"
dotD = hl Delim $ text "."
zeroD = hl Syntax $ text "zero"
succD = hl Syntax $ text "succ"
coeD = hl Syntax $ text "coe"
compD = hl Syntax $ text "comp"
undD = hl Syntax $ text "_"
cstD = hl Syntax $ text "="
pipeD = hl Syntax $ text "|"
fstD = hl Syntax $ text "fst"
sndD = hl Syntax $ text "snd"
export
prettyApp : {opts : LayoutOpts} -> Nat -> Doc opts ->
List (Doc opts) -> Doc opts
prettyApp ind f args =
hsep (f :: args)
<|> hsep [f, vsep args]
<|> vsep (f :: map (indent ind) args)
export
prettyAppD : {opts : LayoutOpts} -> Doc opts -> List (Doc opts) ->
Eff Pretty (Doc opts)
prettyAppD f args = pure $ prettyApp !(askAt INDENT) f args
export
escapeString : String -> String
escapeString = concatMap esc1 . unpack where
esc1 : Char -> String
esc1 '"' = #"\""#
esc1 '\\' = #"\\"#
esc1 '\n' = #"\n"#
esc1 c = singleton c
export
quoteTag : String -> String
quoteTag tag =
if isName tag then tag else
"\"" ++ escapeString tag ++ "\""
export
prettyBounds : {opts : LayoutOpts} -> Bounds -> Eff Pretty (Doc opts)
prettyBounds (MkBounds l1 c1 l2 c2) =
hcat <$> sequence
[hl TVar $ text $ show l1, colonD,
hl DVar $ text $ show c1, hl Delim "-",
hl TVar $ text $ show l2, colonD,
hl DVar $ text $ show c2, colonD]
export
prettyLoc : {opts : LayoutOpts} -> Loc -> Eff Pretty (Doc opts)
prettyLoc (L NoLoc) =
hcat <$> sequence [hl TVarErr "no location", colonD]
prettyLoc (L (YesLoc file b)) =
hcat <$> sequence [hl Free $ text file, colonD, prettyBounds b]
export
prettyTag : {opts : _} -> String -> Eff Pretty (Doc opts)
prettyTag tag = hl Tag $ text $ "'" ++ quoteTag tag