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Diffstat (limited to 'src/Haddock/Backends/Xhtml/Decl.hs')
| -rw-r--r-- | src/Haddock/Backends/Xhtml/Decl.hs | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/src/Haddock/Backends/Xhtml/Decl.hs b/src/Haddock/Backends/Xhtml/Decl.hs new file mode 100644 index 00000000..db6d90a0 --- /dev/null +++ b/src/Haddock/Backends/Xhtml/Decl.hs @@ -0,0 +1,874 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Haddock.Backends.Html.Decl +-- Copyright : (c) Simon Marlow 2003-2006, +-- David Waern 2006-2009, +-- Mark Lentczner 2010 +-- License : BSD-like +-- +-- Maintainer : haddock@projects.haskell.org +-- Stability : experimental +-- Portability : portable +----------------------------------------------------------------------------- + +module Haddock.Backends.Xhtml.Decl where + +import Haddock.Backends.Xhtml.DocMarkup +import Haddock.Backends.Xhtml.Layout +import Haddock.Backends.Xhtml.Names +import Haddock.Backends.Xhtml.Types +import Haddock.Backends.Xhtml.Util +import Haddock.GhcUtils +import Haddock.Types + +import Control.Monad ( join ) +import qualified Data.Map as Map +import Data.Maybe +import Text.XHtml hiding ( name, title, p, quote ) + +import BasicTypes ( IPName(..), Boxity(..) ) +import GHC +import Name +import Outputable ( ppr, showSDoc, Outputable ) + + +-- TODO: use DeclInfo DocName or something +ppDecl' :: Bool -> LinksInfo -> LHsDecl DocName -> + DocForDecl DocName -> [DocInstance DocName] -> [(DocName, DocForDecl DocName)] -> Bool -> Html +ppDecl' s k l m i d u = vanillaTable << ppDecl s k l m i d u + +ppDecl :: Bool -> LinksInfo -> LHsDecl DocName -> + DocForDecl DocName -> [DocInstance DocName] -> [(DocName, DocForDecl DocName)] -> Bool -> HtmlTable +ppDecl summ links (L loc decl) (mbDoc, fnArgsDoc) instances subdocs unicode = case decl of + TyClD d@(TyFamily {}) -> ppTyFam summ False links loc mbDoc d unicode + TyClD d@(TyData {}) + | Nothing <- tcdTyPats d -> ppDataDecl summ links instances subdocs loc mbDoc d unicode + | Just _ <- tcdTyPats d -> ppDataInst summ links loc mbDoc d + TyClD d@(TySynonym {}) + | Nothing <- tcdTyPats d -> ppTySyn summ links loc (mbDoc, fnArgsDoc) d unicode + | Just _ <- tcdTyPats d -> ppTyInst summ False links loc mbDoc d unicode + TyClD d@(ClassDecl {}) -> ppClassDecl summ links instances loc mbDoc subdocs d unicode + SigD (TypeSig (L _ n) (L _ t)) -> ppFunSig summ links loc (mbDoc, fnArgsDoc) n t unicode + ForD d -> ppFor summ links loc (mbDoc, fnArgsDoc) d unicode + InstD _ -> emptyTable + _ -> error "declaration not supported by ppDecl" + +ppFunSig :: Bool -> LinksInfo -> SrcSpan -> DocForDecl DocName -> + DocName -> HsType DocName -> Bool -> HtmlTable +ppFunSig summary links loc doc docname typ unicode = + ppTypeOrFunSig summary links loc docname typ doc + (ppTypeSig summary occname typ unicode, ppBinder False occname, dcolon unicode) unicode + where + occname = docNameOcc docname + +ppTypeOrFunSig :: Bool -> LinksInfo -> SrcSpan -> DocName -> HsType DocName -> + DocForDecl DocName -> (Html, Html, Html) -> Bool -> HtmlTable +ppTypeOrFunSig summary links loc docname typ (doc, argDocs) (pref1, pref2, sep) unicode + | summary || Map.null argDocs = declWithDoc summary links loc docname doc pref1 + | otherwise = topDeclBox links loc docname pref2 </> + (tda [theclass "body"] << vanillaTable << ( + do_args 0 sep typ </> + (case doc of + Just d -> ndocBox (docToHtml d) + Nothing -> emptyTable) + )) + where + argDocHtml n = case Map.lookup n argDocs of + Just adoc -> docToHtml adoc + Nothing -> noHtml + + do_largs n leader (L _ t) = do_args n leader t + do_args :: Int -> Html -> (HsType DocName) -> HtmlTable + do_args n leader (HsForAllTy Explicit tvs lctxt ltype) + = (argBox ( + leader <+> + hsep (forallSymbol unicode : ppTyVars tvs ++ [dot]) <+> + ppLContextNoArrow lctxt unicode) + <-> rdocBox noHtml) </> + do_largs n (darrow unicode) ltype + do_args n leader (HsForAllTy Implicit _ lctxt ltype) + | not (null (unLoc lctxt)) + = (argBox (leader <+> ppLContextNoArrow lctxt unicode) + <-> rdocBox noHtml) </> + do_largs n (darrow unicode) ltype + -- if we're not showing any 'forall' or class constraints or + -- anything, skip having an empty line for the context. + | otherwise + = do_largs n leader ltype + do_args n leader (HsFunTy lt r) + = (argBox (leader <+> ppLFunLhType unicode lt) <-> rdocBox (argDocHtml n)) + </> do_largs (n+1) (arrow unicode) r + do_args n leader t + = argBox (leader <+> ppType unicode t) <-> rdocBox (argDocHtml n) + + +ppTyVars :: [LHsTyVarBndr DocName] -> [Html] +ppTyVars tvs = map ppTyName (tyvarNames tvs) + + +tyvarNames :: [LHsTyVarBndr DocName] -> [Name] +tyvarNames = map (getName . hsTyVarName . unLoc) + + +ppFor :: Bool -> LinksInfo -> SrcSpan -> DocForDecl DocName -> ForeignDecl DocName -> Bool -> HtmlTable +ppFor summary links loc doc (ForeignImport (L _ name) (L _ typ) _) unicode + = ppFunSig summary links loc doc name typ unicode +ppFor _ _ _ _ _ _ = error "ppFor" + + +-- we skip type patterns for now +ppTySyn :: Bool -> LinksInfo -> SrcSpan -> DocForDecl DocName -> TyClDecl DocName -> Bool -> HtmlTable +ppTySyn summary links loc doc (TySynonym (L _ name) ltyvars _ ltype) unicode + = ppTypeOrFunSig summary links loc name (unLoc ltype) doc + (full, hdr, spaceHtml +++ equals) unicode + where + hdr = hsep ([keyword "type", ppBinder summary occ] ++ ppTyVars ltyvars) + full = hdr <+> equals <+> ppLType unicode ltype + occ = docNameOcc name +ppTySyn _ _ _ _ _ _ = error "declaration not supported by ppTySyn" + + +ppTypeSig :: Bool -> OccName -> HsType DocName -> Bool -> Html +ppTypeSig summary nm ty unicode = ppBinder summary nm <+> dcolon unicode <+> ppType unicode ty + + +ppTyName :: Name -> Html +ppTyName name + | isNameSym name = parens (ppName name) + | otherwise = ppName name + + +-------------------------------------------------------------------------------- +-- Type families +-------------------------------------------------------------------------------- + + +ppTyFamHeader :: Bool -> Bool -> TyClDecl DocName -> Bool -> Html +ppTyFamHeader summary associated decl unicode = + + (case tcdFlavour decl of + TypeFamily + | associated -> keyword "type" + | otherwise -> keyword "type family" + DataFamily + | associated -> keyword "data" + | otherwise -> keyword "data family" + ) <+> + + ppTyClBinderWithVars summary decl <+> + + case tcdKind decl of + Just kind -> dcolon unicode <+> ppKind kind + Nothing -> empty + + +ppTyFam :: Bool -> Bool -> LinksInfo -> SrcSpan -> Maybe (Doc DocName) -> + TyClDecl DocName -> Bool -> HtmlTable +ppTyFam summary associated links loc mbDoc decl unicode + + | summary = declWithDoc summary links loc docname mbDoc + (ppTyFamHeader True associated decl unicode) + + | associated, isJust mbDoc = header_ </> bodyBox << doc + | associated = header_ + | null instances, isJust mbDoc = header_ </> bodyBox << doc + | null instances = header_ + | isJust mbDoc = header_ </> bodyBox << (doc </> instancesBit) + | otherwise = header_ </> bodyBox << instancesBit + + where + docname = tcdName decl + + header_ = topDeclBox links loc docname (ppTyFamHeader summary associated decl unicode) + + doc = ndocBox . docToHtml . fromJust $ mbDoc + + instId = collapseId (getName docname) + + instancesBit = instHdr instId </> + tda [theclass "body"] << + collapsed thediv instId ( + spacedTable1 << ( + aboves (map (ppDocInstance unicode) instances) + ) + ) + + -- TODO: get the instances + instances = [] + + +-------------------------------------------------------------------------------- +-- Indexed data types +-------------------------------------------------------------------------------- + + +ppDataInst :: a +ppDataInst = undefined + + +-------------------------------------------------------------------------------- +-- Indexed newtypes +-------------------------------------------------------------------------------- + +-- TODO +-- ppNewTyInst = undefined + + +-------------------------------------------------------------------------------- +-- Indexed types +-------------------------------------------------------------------------------- + + +ppTyInst :: Bool -> Bool -> LinksInfo -> SrcSpan -> Maybe (Doc DocName) -> + TyClDecl DocName -> Bool -> HtmlTable +ppTyInst summary associated links loc mbDoc decl unicode + + | summary = declWithDoc summary links loc docname mbDoc + (ppTyInstHeader True associated decl unicode) + + | isJust mbDoc = header_ </> bodyBox << doc + | otherwise = header_ + + where + docname = tcdName decl + + header_ = topDeclBox links loc docname (ppTyInstHeader summary associated decl unicode) + + doc = case mbDoc of + Just d -> ndocBox (docToHtml d) + Nothing -> emptyTable + + +ppTyInstHeader :: Bool -> Bool -> TyClDecl DocName -> Bool -> Html +ppTyInstHeader _ _ decl unicode = + keyword "type instance" <+> + ppAppNameTypes (tcdName decl) typeArgs unicode + where + typeArgs = map unLoc . fromJust . tcdTyPats $ decl + + +-------------------------------------------------------------------------------- +-- Associated Types +-------------------------------------------------------------------------------- + + +ppAssocType :: Bool -> LinksInfo -> DocForDecl DocName -> LTyClDecl DocName -> Bool -> HtmlTable +ppAssocType summ links doc (L loc decl) unicode = + case decl of + TyFamily {} -> ppTyFam summ True links loc (fst doc) decl unicode + TySynonym {} -> ppTySyn summ links loc doc decl unicode + _ -> error "declaration type not supported by ppAssocType" + + +-------------------------------------------------------------------------------- +-- TyClDecl helpers +-------------------------------------------------------------------------------- + + +-- | Print a type family / newtype / data / class binder and its variables +ppTyClBinderWithVars :: Bool -> TyClDecl DocName -> Html +ppTyClBinderWithVars summ decl = + ppAppDocNameNames summ (unLoc $ tcdLName decl) (tyvarNames $ tcdTyVars decl) + + +-------------------------------------------------------------------------------- +-- Type applications +-------------------------------------------------------------------------------- + + +-- | Print an application of a DocName and a list of HsTypes +ppAppNameTypes :: DocName -> [HsType DocName] -> Bool -> Html +ppAppNameTypes n ts unicode = ppTypeApp n ts ppDocName (ppParendType unicode) + + +-- | Print an application of a DocName and a list of Names +ppAppDocNameNames :: Bool -> DocName -> [Name] -> Html +ppAppDocNameNames summ n ns = + ppTypeApp n ns (ppBinder summ . docNameOcc) ppTyName + + +-- | General printing of type applications +ppTypeApp :: DocName -> [a] -> (DocName -> Html) -> (a -> Html) -> Html +ppTypeApp n (t1:t2:rest) ppDN ppT + | operator, not . null $ rest = parens opApp <+> hsep (map ppT rest) + | operator = opApp + where + operator = isNameSym . getName $ n + opApp = ppT t1 <+> ppDN n <+> ppT t2 + +ppTypeApp n ts ppDN ppT = ppDN n <+> hsep (map ppT ts) + + +------------------------------------------------------------------------------- +-- Contexts +------------------------------------------------------------------------------- + + +ppLContext, ppLContextNoArrow :: Located (HsContext DocName) -> Bool -> Html +ppLContext = ppContext . unLoc +ppLContextNoArrow = ppContextNoArrow . unLoc + + +ppContextNoArrow :: HsContext DocName -> Bool -> Html +ppContextNoArrow [] _ = empty +ppContextNoArrow cxt unicode = pp_hs_context (map unLoc cxt) unicode + + +ppContextNoLocs :: [HsPred DocName] -> Bool -> Html +ppContextNoLocs [] _ = empty +ppContextNoLocs cxt unicode = pp_hs_context cxt unicode <+> darrow unicode + + +ppContext :: HsContext DocName -> Bool -> Html +ppContext cxt unicode = ppContextNoLocs (map unLoc cxt) unicode + + +pp_hs_context :: [HsPred DocName] -> Bool -> Html +pp_hs_context [] _ = empty +pp_hs_context [p] unicode = ppPred unicode p +pp_hs_context cxt unicode = parenList (map (ppPred unicode) cxt) + + +ppPred :: Bool -> HsPred DocName -> Html +ppPred unicode (HsClassP n ts) = ppAppNameTypes n (map unLoc ts) unicode +ppPred unicode (HsEqualP t1 t2) = ppLType unicode t1 <+> toHtml "~" <+> ppLType unicode t2 +ppPred unicode (HsIParam (IPName n) t) + = toHtml "?" +++ ppDocName n <+> dcolon unicode <+> ppLType unicode t + + +------------------------------------------------------------------------------- +-- Class declarations +------------------------------------------------------------------------------- + + +ppClassHdr :: Bool -> Located [LHsPred DocName] -> DocName + -> [Located (HsTyVarBndr DocName)] -> [Located ([DocName], [DocName])] + -> Bool -> Html +ppClassHdr summ lctxt n tvs fds unicode = + keyword "class" + <+> (if not . null . unLoc $ lctxt then ppLContext lctxt unicode else empty) + <+> ppAppDocNameNames summ n (tyvarNames $ tvs) + <+> ppFds fds unicode + + +ppFds :: [Located ([DocName], [DocName])] -> Bool -> Html +ppFds fds unicode = + if null fds then noHtml else + char '|' <+> hsep (punctuate comma (map (fundep . unLoc) fds)) + where + fundep (vars1,vars2) = hsep (map ppDocName vars1) <+> arrow unicode <+> + hsep (map ppDocName vars2) + +ppShortClassDecl :: Bool -> LinksInfo -> TyClDecl DocName -> SrcSpan -> [(DocName, DocForDecl DocName)] -> Bool -> HtmlTable +ppShortClassDecl summary links (ClassDecl lctxt lname tvs fds sigs _ ats _) loc subdocs unicode = + if null sigs && null ats + then (if summary then declBox else topDeclBox links loc nm) hdr + else (if summary then declBox else topDeclBox links loc nm) (hdr <+> keyword "where") + </> + ( + bodyBox << + aboves + ( + [ ppAssocType summary links doc at unicode | at <- ats + , let doc = lookupAnySubdoc (tcdName $ unL at) subdocs ] ++ + + [ ppFunSig summary links loc doc n typ unicode + | L _ (TypeSig (L _ n) (L _ typ)) <- sigs + , let doc = lookupAnySubdoc n subdocs ] + ) + ) + where + hdr = ppClassHdr summary lctxt (unLoc lname) tvs fds unicode + nm = unLoc lname +ppShortClassDecl _ _ _ _ _ _ = error "declaration type not supported by ppShortClassDecl" + + + +ppClassDecl :: Bool -> LinksInfo -> [DocInstance DocName] -> SrcSpan + -> Maybe (Doc DocName) -> [(DocName, DocForDecl DocName)] + -> TyClDecl DocName -> Bool -> HtmlTable +ppClassDecl summary links instances loc mbDoc subdocs + decl@(ClassDecl lctxt lname ltyvars lfds lsigs _ ats _) unicode + | summary = ppShortClassDecl summary links decl loc subdocs unicode + | otherwise = classheader </> bodyBox << (classdoc </> body_ </> instancesBit) + where + classheader + | null lsigs = topDeclBox links loc nm (hdr unicode) + | otherwise = topDeclBox links loc nm (hdr unicode <+> keyword "where") + + nm = unLoc $ tcdLName decl + + hdr = ppClassHdr summary lctxt (unLoc lname) ltyvars lfds + + classdoc = case mbDoc of + Nothing -> emptyTable + Just d -> ndocBox (docToHtml d) + + body_ + | null lsigs, null ats = emptyTable + | null ats = s8 </> methHdr </> bodyBox << methodTable + | otherwise = s8 </> atHdr </> bodyBox << atTable </> + s8 </> methHdr </> bodyBox << methodTable + + methodTable = + abovesSep s8 [ ppFunSig summary links loc doc n typ unicode + | L _ (TypeSig (L _ n) (L _ typ)) <- lsigs + , let doc = lookupAnySubdoc n subdocs ] + + atTable = abovesSep s8 $ [ ppAssocType summary links doc at unicode | at <- ats + , let doc = lookupAnySubdoc (tcdName $ unL at) subdocs ] + + instId = collapseId (getName nm) + instancesBit + | null instances = emptyTable + | otherwise + = s8 </> instHdr instId </> + tda [theclass "body"] << + collapsed thediv instId ( + spacedTable1 << aboves (map (ppDocInstance unicode) instances) + ) +ppClassDecl _ _ _ _ _ _ _ _ = error "declaration type not supported by ppShortClassDecl" + + +-- | Print a possibly commented instance. The instance header is printed inside +-- an 'argBox'. The comment is printed to the right of the box in normal comment +-- style. +ppDocInstance :: Bool -> DocInstance DocName -> HtmlTable +ppDocInstance unicode (instHead, maybeDoc) = + argBox (ppInstHead unicode instHead) <-> maybeRDocBox maybeDoc + + +ppInstHead :: Bool -> InstHead DocName -> Html +ppInstHead unicode ([], n, ts) = ppAppNameTypes n ts unicode +ppInstHead unicode (ctxt, n, ts) = ppContextNoLocs ctxt unicode <+> ppAppNameTypes n ts unicode + + +lookupAnySubdoc :: (Eq name1) => + name1 -> [(name1, DocForDecl name2)] -> DocForDecl name2 +lookupAnySubdoc n subdocs = case lookup n subdocs of + Nothing -> noDocForDecl + Just docs -> docs + + + +-- ----------------------------------------------------------------------------- +-- Data & newtype declarations + + +-- TODO: print contexts +ppShortDataDecl :: Bool -> LinksInfo -> SrcSpan -> TyClDecl DocName -> Bool -> Html +ppShortDataDecl summary links loc dataDecl unicode + + | [lcon] <- cons, ResTyH98 <- resTy = + ppDataHeader summary dataDecl unicode + <+> equals <+> ppShortConstr summary (unLoc lcon) unicode + + | [] <- cons = ppDataHeader summary dataDecl unicode + + | otherwise = vanillaTable << ( + case resTy of + ResTyH98 -> dataHeader </> + tda [theclass "body"] << vanillaTable << ( + aboves (zipWith doConstr ('=':repeat '|') cons) + ) + ResTyGADT _ -> dataHeader </> + tda [theclass "body"] << vanillaTable << ( + aboves (map doGADTConstr cons) + ) + ) + + where + dataHeader = + (if summary then declBox else topDeclBox links loc docname) + ((ppDataHeader summary dataDecl unicode) <+> + case resTy of ResTyGADT _ -> keyword "where"; _ -> empty) + + doConstr c con = declBox (toHtml [c] <+> ppShortConstr summary (unLoc con) unicode) + doGADTConstr con = declBox (ppShortConstr summary (unLoc con) unicode) + + docname = unLoc . tcdLName $ dataDecl + cons = tcdCons dataDecl + resTy = (con_res . unLoc . head) cons + +ppDataDecl :: Bool -> LinksInfo -> [DocInstance DocName] -> + [(DocName, DocForDecl DocName)] -> + SrcSpan -> Maybe (Doc DocName) -> TyClDecl DocName -> Bool -> HtmlTable +ppDataDecl summary links instances subdocs loc mbDoc dataDecl unicode + + | summary = declWithDoc summary links loc docname mbDoc + (ppShortDataDecl summary links loc dataDecl unicode) + + | otherwise + = (if validTable then (</>) else const) header_ $ + tda [theclass "body"] << vanillaTable << ( + datadoc </> + constrBit </> + instancesBit + ) + + + where + docname = unLoc . tcdLName $ dataDecl + cons = tcdCons dataDecl + resTy = (con_res . unLoc . head) cons + + header_ = topDeclBox links loc docname (ppDataHeader summary dataDecl unicode + <+> whereBit) + + whereBit + | null cons = empty + | otherwise = case resTy of + ResTyGADT _ -> keyword "where" + _ -> empty + + constrTable + | any isRecCon cons = spacedTable5 + | otherwise = spacedTable1 + + datadoc = case mbDoc of + Just doc -> ndocBox (docToHtml doc) + Nothing -> emptyTable + + constrBit + | null cons = emptyTable + | otherwise = constrHdr </> ( + tda [theclass "body"] << constrTable << + aboves (map (ppSideBySideConstr subdocs unicode) cons) + ) + + instId = collapseId (getName docname) + + instancesBit + | null instances = emptyTable + | otherwise + = instHdr instId </> + tda [theclass "body"] << + collapsed thediv instId ( + spacedTable1 << aboves (map (ppDocInstance unicode) instances + ) + ) + + validTable = isJust mbDoc || not (null cons) || not (null instances) + + +isRecCon :: Located (ConDecl a) -> Bool +isRecCon lcon = case con_details (unLoc lcon) of + RecCon _ -> True + _ -> False + + +ppShortConstr :: Bool -> ConDecl DocName -> Bool -> Html +ppShortConstr summary con unicode = case con_res con of + ResTyH98 -> case con_details con of + PrefixCon args -> header_ unicode +++ hsep (ppBinder summary occ : map (ppLParendType unicode) args) + RecCon fields -> header_ unicode +++ ppBinder summary occ <+> + doRecordFields fields + InfixCon arg1 arg2 -> header_ unicode +++ + hsep [ppLParendType unicode arg1, ppBinder summary occ, ppLParendType unicode arg2] + + ResTyGADT resTy -> case con_details con of + -- prefix & infix could use hsConDeclArgTys if it seemed to + -- simplify the code. + PrefixCon args -> doGADTCon args resTy + -- display GADT records with the new syntax, + -- Constr :: (Context) => { field :: a, field2 :: b } -> Ty (a, b) + -- (except each field gets its own line in docs, to match + -- non-GADT records) + RecCon fields -> ppBinder summary occ <+> dcolon unicode <+> hsep [ + ppForAll forall ltvs lcontext unicode, + doRecordFields fields, + arrow unicode <+> ppLType unicode resTy ] + InfixCon arg1 arg2 -> doGADTCon [arg1, arg2] resTy + + where + doRecordFields fields = braces (vanillaTable << + aboves (map (ppShortField summary unicode) fields)) + doGADTCon args resTy = ppBinder summary occ <+> dcolon unicode <+> hsep [ + ppForAll forall ltvs lcontext unicode, + ppLType unicode (foldr mkFunTy resTy args) ] + + header_ = ppConstrHdr forall tyVars context + occ = docNameOcc . unLoc . con_name $ con + ltvs = con_qvars con + tyVars = tyvarNames ltvs + lcontext = con_cxt con + context = unLoc (con_cxt con) + forall = con_explicit con + mkFunTy a b = noLoc (HsFunTy a b) + +-- ppConstrHdr is for (non-GADT) existentials constructors' syntax +ppConstrHdr :: HsExplicitForAll -> [Name] -> HsContext DocName -> Bool -> Html +ppConstrHdr forall tvs ctxt unicode + = (if null tvs then noHtml else ppForall) + +++ + (if null ctxt then noHtml else ppContextNoArrow ctxt unicode <+> darrow unicode +++ toHtml " ") + where + ppForall = case forall of + Explicit -> forallSymbol unicode <+> hsep (map ppName tvs) <+> toHtml ". " + Implicit -> empty + +ppSideBySideConstr :: [(DocName, DocForDecl DocName)] -> Bool -> LConDecl DocName -> HtmlTable +ppSideBySideConstr subdocs unicode (L _ con) = case con_res con of + + ResTyH98 -> case con_details con of + + PrefixCon args -> + argBox (hsep ((header_ unicode +++ ppBinder False occ) : map (ppLParendType unicode) args)) + <-> maybeRDocBox mbDoc + + RecCon fields -> + argBox (header_ unicode +++ ppBinder False occ) <-> + maybeRDocBox mbDoc + </> + doRecordFields fields + + InfixCon arg1 arg2 -> + argBox (hsep [header_ unicode+++ppLParendType unicode arg1, ppBinder False occ, ppLParendType unicode arg2]) + <-> maybeRDocBox mbDoc + + ResTyGADT resTy -> case con_details con of + -- prefix & infix could also use hsConDeclArgTys if it seemed to + -- simplify the code. + PrefixCon args -> doGADTCon args resTy + cd@(RecCon fields) -> doGADTCon (hsConDeclArgTys cd) resTy + </> doRecordFields fields + InfixCon arg1 arg2 -> doGADTCon [arg1, arg2] resTy + + where + doRecordFields fields = + (tda [theclass "body"] << spacedTable1 << + aboves (map (ppSideBySideField subdocs unicode) fields)) + doGADTCon args resTy = argBox (ppBinder False occ <+> dcolon unicode <+> hsep [ + ppForAll forall ltvs (con_cxt con) unicode, + ppLType unicode (foldr mkFunTy resTy args) ] + ) <-> maybeRDocBox mbDoc + + + header_ = ppConstrHdr forall tyVars context + occ = docNameOcc . unLoc . con_name $ con + ltvs = con_qvars con + tyVars = tyvarNames (con_qvars con) + context = unLoc (con_cxt con) + forall = con_explicit con + -- don't use "con_doc con", in case it's reconstructed from a .hi file, + -- or also because we want Haddock to do the doc-parsing, not GHC. + -- 'join' is in Maybe. + mbDoc = join $ fmap fst $ lookup (unLoc $ con_name con) subdocs + mkFunTy a b = noLoc (HsFunTy a b) + +ppSideBySideField :: [(DocName, DocForDecl DocName)] -> Bool -> ConDeclField DocName -> HtmlTable +ppSideBySideField subdocs unicode (ConDeclField (L _ name) ltype _) = + argBox (ppBinder False (docNameOcc name) + <+> dcolon unicode <+> ppLType unicode ltype) <-> maybeRDocBox mbDoc + where + -- don't use cd_fld_doc for same reason we don't use con_doc above + mbDoc = join $ fmap fst $ lookup name subdocs + +{- +ppHsFullConstr :: HsConDecl -> Html +ppHsFullConstr (HsConDecl _ nm tvs ctxt typeList doc) = + declWithDoc False doc ( + hsep ((ppHsConstrHdr tvs ctxt +++ + ppHsBinder False nm) : map ppHsBangType typeList) + ) +ppHsFullConstr (HsRecDecl _ nm tvs ctxt fields doc) = + td << vanillaTable << ( + case doc of + Nothing -> aboves [hdr, fields_html] + Just _ -> aboves [hdr, constr_doc, fields_html] + ) + + where hdr = declBox (ppHsConstrHdr tvs ctxt +++ ppHsBinder False nm) + + constr_doc + | isJust doc = docBox (docToHtml (fromJust doc)) + | otherwise = emptyTable + + fields_html = + td << + table ! [width "100%", cellpadding 0, cellspacing 8] << ( + aboves (map ppFullField (concat (map expandField fields))) + ) +-} + +ppShortField :: Bool -> Bool -> ConDeclField DocName -> HtmlTable +ppShortField summary unicode (ConDeclField (L _ name) ltype _) + = tda [theclass "recfield"] << ( + ppBinder summary (docNameOcc name) + <+> dcolon unicode <+> ppLType unicode ltype + ) + +{- +ppFullField :: HsFieldDecl -> Html +ppFullField (HsFieldDecl [n] ty doc) + = declWithDoc False doc ( + ppHsBinder False n <+> dcolon <+> ppHsBangType ty + ) +ppFullField _ = error "ppFullField" + +expandField :: HsFieldDecl -> [HsFieldDecl] +expandField (HsFieldDecl ns ty doc) = [ HsFieldDecl [n] ty doc | n <- ns ] +-} + +-- | Print the LHS of a data\/newtype declaration. +-- Currently doesn't handle 'data instance' decls or kind signatures +ppDataHeader :: Bool -> TyClDecl DocName -> Bool -> Html +ppDataHeader summary decl unicode + | not (isDataDecl decl) = error "ppDataHeader: illegal argument" + | otherwise = + -- newtype or data + (if tcdND decl == NewType then keyword "newtype" else keyword "data") <+> + -- context + ppLContext (tcdCtxt decl) unicode <+> + -- T a b c ..., or a :+: b + ppTyClBinderWithVars summary decl + + +-- ---------------------------------------------------------------------------- +-- Types and contexts + + +ppKind :: Outputable a => a -> Html +ppKind k = toHtml $ showSDoc (ppr k) + + +{- +ppForAll Implicit _ lctxt = ppCtxtPart lctxt +ppForAll Explicit ltvs lctxt = + hsep (keyword "forall" : ppTyVars ltvs ++ [dot]) <+> ppCtxtPart lctxt +-} + + +ppBang :: HsBang -> Html +ppBang HsNoBang = empty +ppBang HsStrict = toHtml "!" +ppBang HsUnbox = toHtml "!" -- unboxed args is an implementation detail, + -- so we just show the strictness annotation + + +tupleParens :: Boxity -> [Html] -> Html +tupleParens Boxed = parenList +tupleParens Unboxed = ubxParenList +{- +ppType :: HsType DocName -> Html +ppType t = case t of + t@(HsForAllTy expl ltvs lcontext ltype) -> ppForAllTy t <+> ppLType ltype + HsTyVar n -> ppDocName n + HsBangTy HsStrict lt -> toHtml "!" <+> ppLType lt + HsBangTy HsUnbox lt -> toHtml "!!" <+> ppLType lt + HsAppTy a b -> ppLType a <+> ppLType b + HsFunTy a b -> hsep [ppLType a, toHtml "->", ppLType b] + HsListTy t -> brackets $ ppLType t + HsPArrTy t -> toHtml "[:" +++ ppLType t +++ toHtml ":]" + HsTupleTy Boxed ts -> parenList $ map ppLType ts + HsTupleTy Unboxed ts -> ubxParenList $ map ppLType ts + HsOpTy a n b -> ppLType a <+> ppLDocName n <+> ppLType b + HsParTy t -> parens $ ppLType t + HsNumTy n -> toHtml (show n) + HsPredTy p -> ppPred p + HsKindSig t k -> hsep [ppLType t, dcolon, ppKind k] + HsSpliceTy _ -> error "ppType" + HsDocTy t _ -> ppLType t +-} + + +-------------------------------------------------------------------------------- +-- Rendering of HsType +-------------------------------------------------------------------------------- + + +pREC_TOP, pREC_FUN, pREC_OP, pREC_CON :: Int + +pREC_TOP = (0 :: Int) -- type in ParseIface.y in GHC +pREC_FUN = (1 :: Int) -- btype in ParseIface.y in GHC + -- Used for LH arg of (->) +pREC_OP = (2 :: Int) -- Used for arg of any infix operator + -- (we don't keep their fixities around) +pREC_CON = (3 :: Int) -- Used for arg of type applicn: + -- always parenthesise unless atomic + +maybeParen :: Int -- Precedence of context + -> Int -- Precedence of top-level operator + -> Html -> Html -- Wrap in parens if (ctxt >= op) +maybeParen ctxt_prec op_prec p | ctxt_prec >= op_prec = parens p + | otherwise = p + + +ppLType, ppLParendType, ppLFunLhType :: Bool -> Located (HsType DocName) -> Html +ppLType unicode y = ppType unicode (unLoc y) +ppLParendType unicode y = ppParendType unicode (unLoc y) +ppLFunLhType unicode y = ppFunLhType unicode (unLoc y) + + +ppType, ppParendType, ppFunLhType :: Bool -> HsType DocName -> Html +ppType unicode ty = ppr_mono_ty pREC_TOP ty unicode +ppParendType unicode ty = ppr_mono_ty pREC_CON ty unicode +ppFunLhType unicode ty = ppr_mono_ty pREC_FUN ty unicode + + +-- Drop top-level for-all type variables in user style +-- since they are implicit in Haskell + +ppForAll :: HsExplicitForAll -> [Located (HsTyVarBndr DocName)] + -> Located (HsContext DocName) -> Bool -> Html +ppForAll expl tvs cxt unicode + | show_forall = forall_part <+> ppLContext cxt unicode + | otherwise = ppLContext cxt unicode + where + show_forall = not (null tvs) && is_explicit + is_explicit = case expl of {Explicit -> True; Implicit -> False} + forall_part = hsep (forallSymbol unicode : ppTyVars tvs) +++ dot + + +ppr_mono_lty :: Int -> LHsType DocName -> Bool -> Html +ppr_mono_lty ctxt_prec ty unicode = ppr_mono_ty ctxt_prec (unLoc ty) unicode + + +ppr_mono_ty :: Int -> HsType DocName -> Bool -> Html +ppr_mono_ty ctxt_prec (HsForAllTy expl tvs ctxt ty) unicode + = maybeParen ctxt_prec pREC_FUN $ + hsep [ppForAll expl tvs ctxt unicode, ppr_mono_lty pREC_TOP ty unicode] + +-- gaw 2004 +ppr_mono_ty _ (HsBangTy b ty) u = ppBang b +++ ppLParendType u ty +ppr_mono_ty _ (HsTyVar name) _ = ppDocName name +ppr_mono_ty ctxt_prec (HsFunTy ty1 ty2) u = ppr_fun_ty ctxt_prec ty1 ty2 u +ppr_mono_ty _ (HsTupleTy con tys) u = tupleParens con (map (ppLType u) tys) +ppr_mono_ty _ (HsKindSig ty kind) u = parens (ppr_mono_lty pREC_TOP ty u <+> dcolon u <+> ppKind kind) +ppr_mono_ty _ (HsListTy ty) u = brackets (ppr_mono_lty pREC_TOP ty u) +ppr_mono_ty _ (HsPArrTy ty) u = pabrackets (ppr_mono_lty pREC_TOP ty u) +ppr_mono_ty _ (HsPredTy p) u = parens (ppPred u p) +ppr_mono_ty _ (HsNumTy n) _ = toHtml (show n) -- generics only +ppr_mono_ty _ (HsSpliceTy _) _ = error "ppr_mono_ty HsSpliceTy" +ppr_mono_ty _ (HsSpliceTyOut _) _ = error "ppr_mono_ty HsSpliceTyOut" +ppr_mono_ty _ (HsRecTy _) _ = error "ppr_mono_ty HsRecTy" + + +ppr_mono_ty ctxt_prec (HsAppTy fun_ty arg_ty) unicode + = maybeParen ctxt_prec pREC_CON $ + hsep [ppr_mono_lty pREC_FUN fun_ty unicode, ppr_mono_lty pREC_CON arg_ty unicode] + +ppr_mono_ty ctxt_prec (HsOpTy ty1 op ty2) unicode + = maybeParen ctxt_prec pREC_FUN $ + ppr_mono_lty pREC_OP ty1 unicode <+> ppr_op <+> ppr_mono_lty pREC_OP ty2 unicode + where + ppr_op = if not (isSymOcc occName) then quote (ppLDocName op) else ppLDocName op + occName = docNameOcc . unLoc $ op + +ppr_mono_ty ctxt_prec (HsParTy ty) unicode +-- = parens (ppr_mono_lty pREC_TOP ty) + = ppr_mono_lty ctxt_prec ty unicode + +ppr_mono_ty ctxt_prec (HsDocTy ty _) unicode + = ppr_mono_lty ctxt_prec ty unicode + + +ppr_fun_ty :: Int -> LHsType DocName -> LHsType DocName -> Bool -> Html +ppr_fun_ty ctxt_prec ty1 ty2 unicode + = let p1 = ppr_mono_lty pREC_FUN ty1 unicode + p2 = ppr_mono_lty pREC_TOP ty2 unicode + in + maybeParen ctxt_prec pREC_FUN $ + hsep [p1, arrow unicode <+> p2] + + |