diff options
Diffstat (limited to 'src/Text/Pandoc/Writers/HTML.hs')
| -rw-r--r-- | src/Text/Pandoc/Writers/HTML.hs | 63 |
1 files changed, 53 insertions, 10 deletions
diff --git a/src/Text/Pandoc/Writers/HTML.hs b/src/Text/Pandoc/Writers/HTML.hs index 9ead604d7..e261cfca8 100644 --- a/src/Text/Pandoc/Writers/HTML.hs +++ b/src/Text/Pandoc/Writers/HTML.hs @@ -1,4 +1,4 @@ -{-# LANGUAGE OverloadedStrings, CPP #-} +{-# LANGUAGE OverloadedStrings, CPP, ViewPatterns #-} {-# OPTIONS_GHC -fno-warn-deprecations #-} {- Copyright (C) 2006-2014 John MacFarlane <jgm@berkeley.edu> @@ -60,6 +60,8 @@ import qualified Text.Blaze.XHtml1.Transitional.Attributes as A import Text.Blaze.Renderer.String (renderHtml) import Text.TeXMath import Text.XML.Light.Output +import Text.XML.Light (unode, elChildren, add_attr, unqual) +import qualified Text.XML.Light as XML import System.FilePath (takeExtension) import Data.Monoid import Data.Aeson (Value) @@ -71,11 +73,13 @@ data WriterState = WriterState , stQuotes :: Bool -- ^ <q> tag is used , stHighlighting :: Bool -- ^ Syntax highlighting is used , stSecNum :: [Int] -- ^ Number of current section + , stElement :: Bool -- ^ Processing an Element } defaultWriterState :: WriterState defaultWriterState = WriterState {stNotes= [], stMath = False, stQuotes = False, - stHighlighting = False, stSecNum = []} + stHighlighting = False, stSecNum = [], + stElement = False} -- Helpers to render HTML with the appropriate function. @@ -155,6 +159,10 @@ pandocToHtml opts (Pandoc meta blocks) = do H.script ! A.src (toValue url) ! A.type_ "text/javascript" $ mempty + KaTeX js css -> + (H.script ! A.src (toValue js) $ mempty) <> + (H.link ! A.rel "stylesheet" ! A.href (toValue css)) <> + (H.script ! A.type_ "text/javascript" $ toHtml renderKaTeX) _ -> case lookup "mathml-script" (writerVariables opts) of Just s | not (writerHtml5 opts) -> H.script ! A.type_ "text/javascript" @@ -274,7 +282,13 @@ elementToHtml slideLevel opts (Sec level num (id',classes,keyvals) title' elemen let titleSlide = slide && level < slideLevel header' <- if title' == [Str "\0"] -- marker for hrule then return mempty - else blockToHtml opts (Header level' (id',classes,keyvals) title') + else do + modify (\st -> st{ stElement = True}) + res <- blockToHtml opts + (Header level' (id',classes,keyvals) title') + modify (\st -> st{ stElement = False}) + return res + let isSec (Sec _ _ _ _ _) = True isSec (Blk _) = False let isPause (Blk x) = x == Para [Str ".",Space,Str ".",Space,Str "."] @@ -342,10 +356,10 @@ parseMailto s = do _ -> fail "not a mailto: URL" -- | Obfuscate a "mailto:" link. -obfuscateLink :: WriterOptions -> String -> String -> Html +obfuscateLink :: WriterOptions -> Html -> String -> Html obfuscateLink opts txt s | writerEmailObfuscation opts == NoObfuscation = - H.a ! A.href (toValue s) $ toHtml txt -obfuscateLink opts txt s = + H.a ! A.href (toValue s) $ txt +obfuscateLink opts (renderHtml -> txt) s = let meth = writerEmailObfuscation opts s' = map toLower (take 7 s) ++ drop 7 s in case parseMailto s' of @@ -485,7 +499,7 @@ blockToHtml opts (BlockQuote blocks) = else do contents <- blockListToHtml opts blocks return $ H.blockquote $ nl opts >> contents >> nl opts -blockToHtml opts (Header level (_,classes,_) lst) = do +blockToHtml opts (Header level attr@(_,classes,_) lst) = do contents <- inlineListToHtml opts lst secnum <- liftM stSecNum get let contents' = if writerNumberSections opts && not (null secnum) @@ -493,7 +507,9 @@ blockToHtml opts (Header level (_,classes,_) lst) = do then (H.span ! A.class_ "header-section-number" $ toHtml $ showSecNum secnum) >> strToHtml " " >> contents else contents - return $ case level of + inElement <- gets stElement + return $ (if inElement then id else addAttrs opts attr) + $ case level of 1 -> H.h1 contents' 2 -> H.h2 contents' 3 -> H.h3 contents' @@ -615,6 +631,18 @@ inlineListToHtml :: WriterOptions -> [Inline] -> State WriterState Html inlineListToHtml opts lst = mapM (inlineToHtml opts) lst >>= return . mconcat +-- | Annotates a MathML expression with the tex source +annotateMML :: XML.Element -> String -> XML.Element +annotateMML e tex = math (unode "semantics" [cs, unode "annotation" (annotAttrs, tex)]) + where + cs = case elChildren e of + [] -> unode "mrow" () + [x] -> x + xs -> unode "mrow" xs + math = add_attr (XML.Attr (unqual "xmlns") "http://www.w3.org/1998/Math/MathML") . unode "math" + annotAttrs = [XML.Attr (unqual "encoding") "application/x-tex"] + + -- | Convert Pandoc inline element to HTML. inlineToHtml :: WriterOptions -> Inline -> State WriterState Html inlineToHtml opts inline = @@ -706,7 +734,7 @@ inlineToHtml opts inline = defaultConfigPP case writeMathML dt <$> readTeX str of Right r -> return $ preEscapedString $ - ppcElement conf r + ppcElement conf (annotateMML r str) Left _ -> inlineListToHtml opts (texMathToInlines t str) >>= return . (H.span ! A.class_ "math") @@ -714,6 +742,10 @@ inlineToHtml opts inline = case t of InlineMath -> "\\(" ++ str ++ "\\)" DisplayMath -> "\\[" ++ str ++ "\\]" + KaTeX _ _ -> return $ H.span ! A.class_ "math" $ + toHtml (case t of + InlineMath -> str + DisplayMath -> "\\displaystyle " ++ str) PlainMath -> do x <- inlineListToHtml opts (texMathToInlines t str) let m = H.span ! A.class_ "math" $ x @@ -731,7 +763,7 @@ inlineToHtml opts inline = | otherwise -> return mempty (Link txt (s,_)) | "mailto:" `isPrefixOf` s -> do linkText <- inlineListToHtml opts txt - return $ obfuscateLink opts (renderHtml linkText) s + return $ obfuscateLink opts linkText s (Link txt (s,tit)) -> do linkText <- inlineListToHtml opts txt let s' = case s of @@ -815,3 +847,14 @@ blockListToNote opts ref blocks = Just EPUB3 -> noteItem ! customAttribute "epub:type" "footnote" _ -> noteItem return $ nl opts >> noteItem' + +-- Javascript snippet to render all KaTeX elements +renderKaTeX :: String +renderKaTeX = unlines [ + "window.onload = function(){var mathElements = document.getElementsByClassName(\"math\");" + , "for (var i=0; i < mathElements.length; i++)" + , "{" + , " var texText = mathElements[i].firstChild" + , " katex.render(texText.data, mathElements[i])" + , "}}" + ] |