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module Haddock.Backends.Hyperlinker.Renderer (render) where
import Haddock.Backends.Hyperlinker.Parser
import Haddock.Backends.Hyperlinker.Ast
import qualified GHC
import qualified Name as GHC
import qualified Unique as GHC
import Data.List
import Data.Monoid
import Text.XHtml (Html, HtmlAttr, (!))
import qualified Text.XHtml as Html
type StyleClass = String
render :: Maybe FilePath -> [RichToken] -> Html
render css tokens = header css <> body tokens
body :: [RichToken] -> Html
body = Html.body . Html.pre . mconcat . map richToken
header :: Maybe FilePath -> Html
header Nothing = Html.noHtml
header (Just css) =
Html.header $ Html.thelink Html.noHtml ! attrs
where
attrs =
[ Html.rel "stylesheet"
, Html.href css
, Html.thetype "text/css"
]
richToken :: RichToken -> Html
richToken (RichToken tok Nothing) =
tokenSpan tok ! attrs
where
attrs = [ multiclass . tokenStyle . tkType $ tok ]
richToken (RichToken tok (Just det)) =
externalAnchor det . internalAnchor det . hyperlink det $ content
where
content = tokenSpan tok ! [ multiclass style]
style = (tokenStyle . tkType) tok ++ richTokenStyle det
tokenSpan :: Token -> Html
tokenSpan = Html.thespan . Html.toHtml . tkValue
richTokenStyle :: TokenDetails -> [StyleClass]
richTokenStyle (RtkVar _) = ["hs-var"]
richTokenStyle (RtkType _) = ["hs-type"]
richTokenStyle _ = []
tokenStyle :: TokenType -> [StyleClass]
tokenStyle TkIdentifier = ["hs-identifier"]
tokenStyle TkKeyword = ["hs-keyword"]
tokenStyle TkString = ["hs-string"]
tokenStyle TkChar = ["hs-char"]
tokenStyle TkNumber = ["hs-number"]
tokenStyle TkOperator = ["hs-operator"]
tokenStyle TkGlyph = ["hs-glyph"]
tokenStyle TkSpecial = ["hs-special"]
tokenStyle TkSpace = []
tokenStyle TkComment = ["hs-comment"]
tokenStyle TkCpp = ["hs-cpp"]
tokenStyle TkPragma = ["hs-pragma"]
tokenStyle TkUnknown = []
multiclass :: [StyleClass] -> HtmlAttr
multiclass = Html.theclass . intercalate " "
externalAnchor :: TokenDetails -> Html -> Html
externalAnchor (RtkDecl name) content =
Html.anchor content ! [ Html.name $ externalAnchorIdent name ]
externalAnchor _ content = content
internalAnchor :: TokenDetails -> Html -> Html
internalAnchor (RtkBind name) content =
Html.anchor content ! [ Html.name $ internalAnchorIdent name ]
internalAnchor _ content = content
externalAnchorIdent :: GHC.Name -> String
externalAnchorIdent = GHC.occNameString . GHC.nameOccName
internalAnchorIdent :: GHC.Name -> String
internalAnchorIdent = ("local-" ++) . show . GHC.getKey . GHC.nameUnique
hyperlink :: TokenDetails -> Html -> Html
hyperlink details =
if GHC.isInternalName $ name
then internalHyperlink name
else externalHyperlink name
where
name = rtkName details
internalHyperlink :: GHC.Name -> Html -> Html
internalHyperlink name content =
Html.anchor content ! [ Html.href $ "#" ++ internalAnchorIdent name ]
externalHyperlink :: GHC.Name -> Html -> Html
externalHyperlink name content =
Html.anchor content ! [ Html.href $ maybe "" id mmod ++ ".html#" ++ ident ]
where
mmod = GHC.moduleNameString . GHC.moduleName <$> GHC.nameModule_maybe name
ident = externalAnchorIdent name
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