Handle inline math with mathjax.

4 files changed, 8 insertions, 0 deletions

diff --git a/haddock-api/src/Haddock/Backends/Hoogle.hs b/haddock-api/src/Haddock/Backends/Hoogle.hs
index a9bc9a8b..8d67bd45 100644
--- a/haddock-api/src/Haddock/Backends/Hoogle.hs
+++ b/haddock-api/src/Haddock/Backends/Hoogle.hs
@@ -308,6 +308,8 @@ markupTag dflags = Markup {
   markupBold                 = box (TagInline "b"),
   markupMonospaced           = box (TagInline "tt"),
   markupPic                  = const $ str " ",
+  -- FIXME: We could actually emit the mathjax as it is moderately readable
+  markupMathInline           = const $ str "<math>",
   markupUnorderedList        = box (TagL 'u'),
   markupOrderedList          = box (TagL 'o'),
   markupDefList              = box (TagL 'u') . map (\(a,b) -> TagInline "i" a : Str " " : b),
diff --git a/haddock-api/src/Haddock/Backends/LaTeX.hs b/haddock-api/src/Haddock/Backends/LaTeX.hs
index ab6bb41c..34aca327 100644
--- a/haddock-api/src/Haddock/Backends/LaTeX.hs
+++ b/haddock-api/src/Haddock/Backends/LaTeX.hs
@@ -1107,6 +1107,7 @@ parLatexMarkup ppId = Markup {
   markupMonospaced           = \p _ -> tt (p Mono),
   markupUnorderedList        = \p v -> itemizedList (map ($v) p) $$ text "",
   markupPic                  = \p _ -> markupPic p,
+  markupMathInline           = \p _ -> markupMathInline p,
   markupOrderedList          = \p v -> enumeratedList (map ($v) p) $$ text "",
   markupDefList              = \l v -> descriptionList (map (\(a,b) -> (a v, b v)) l),
   markupCodeBlock            = \p _ -> quote (verb (p Verb)) $$ text "",
@@ -1139,6 +1140,8 @@ parLatexMarkup ppId = Markup {
 
         beg = text "image: " <> text uri
 
+    markupMathInline mathjax = text "$" <> text mathjax <> text "$"
+
     markupId ppId_ id v =
       case v of
         Verb  -> theid
diff --git a/haddock-api/src/Haddock/Backends/Xhtml.hs b/haddock-api/src/Haddock/Backends/Xhtml.hs
index 1554a33c..89772441 100644
--- a/haddock-api/src/Haddock/Backends/Xhtml.hs
+++ b/haddock-api/src/Haddock/Backends/Xhtml.hs
@@ -114,6 +114,7 @@ headHtml docTitle miniPage themes =
     thetitle << docTitle,
     styleSheet themes,
     script ! [src jsFile, thetype "text/javascript"] << noHtml,
+    script ! [src "https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML", thetype "text/javascript"] << noHtml,
     script ! [thetype "text/javascript"]
         -- NB: Within XHTML, the content of script tags needs to be
         -- a <![CDATA[ section. Will break if the miniPage name could
diff --git a/haddock-api/src/Haddock/Backends/Xhtml/DocMarkup.hs b/haddock-api/src/Haddock/Backends/Xhtml/DocMarkup.hs
index 3fe74a82..b291af0b 100644
--- a/haddock-api/src/Haddock/Backends/Xhtml/DocMarkup.hs
+++ b/haddock-api/src/Haddock/Backends/Xhtml/DocMarkup.hs
@@ -33,6 +33,7 @@ import Data.Maybe (fromMaybe)
 import GHC
 import Name
 
+
 parHtmlMarkup :: Qualification -> Bool
               -> (Bool -> a -> Html) -> DocMarkup a Html
 parHtmlMarkup qual insertAnchors ppId = Markup {
@@ -67,6 +68,7 @@ parHtmlMarkup qual insertAnchors ppId = Markup {
                                   then namedAnchor aname << ""
                                   else noHtml,
   markupPic                  = \(Picture uri t) -> image ! ([src uri] ++ fromMaybe [] (return . title <$> t)),
+  markupMathInline           = \mathjax -> toHtml ("\\(" ++ mathjax ++ "\\)"),
   markupProperty             = pre . toHtml,
   markupExample              = examplesToHtml,
   markupHeader               = \(Header l t) -> makeHeader l t