diff options
| -rw-r--r-- | MANUAL.txt | 6 | ||||
| -rw-r--r-- | src/Text/Pandoc/Writers/HTML.hs | 8 |
2 files changed, 12 insertions, 2 deletions
diff --git a/MANUAL.txt b/MANUAL.txt index f98a17fbc..9ac9faadd 100644 --- a/MANUAL.txt +++ b/MANUAL.txt @@ -1988,6 +1988,12 @@ ODT or pptx. [Unicode Bidirectional Algorithm]: http://www.w3.org/International/articles/inline-bidi-markup/uba-basics [Language subtag lookup]: https://r12a.github.io/app-subtags/ +### Variables for HTML math + +`classoption` +: when using [KaTeX](#option--katex), you can render display math equations + flush left using [YAML metadata](#layout) or with `-M classoption=fleqn`. + ### Variables for HTML slides These affect HTML output when [producing slide shows with pandoc]. diff --git a/src/Text/Pandoc/Writers/HTML.hs b/src/Text/Pandoc/Writers/HTML.hs index d7a7e19ea..84d5ca4dd 100644 --- a/src/Text/Pandoc/Writers/HTML.hs +++ b/src/Text/Pandoc/Writers/HTML.hs @@ -281,8 +281,12 @@ pandocToHtml opts (Pandoc meta blocks) = do H.script ! A.src (toValue $ url ++ "katex.min.js") $ mempty nl opts - H.script - "document.addEventListener(\"DOMContentLoaded\", function () {\n var mathElements = document.getElementsByClassName(\"math\");\n for (var i = 0; i < mathElements.length; i++) {\n var texText = mathElements[i].firstChild;\n if (mathElements[i].tagName == \"SPAN\") { katex.render(texText.data, mathElements[i], { displayMode: mathElements[i].classList.contains(\"display\"), throwOnError: false } );\n }}});" + let katexFlushLeft = + case lookupContext "classoption" metadata of + Just clsops | "fleqn" `elem` (clsops :: [Text]) -> "true" + _ -> "false" + H.script $ + "document.addEventListener(\"DOMContentLoaded\", function () {\n var mathElements = document.getElementsByClassName(\"math\");\n for (var i = 0; i < mathElements.length; i++) {\n var texText = mathElements[i].firstChild;\n if (mathElements[i].tagName == \"SPAN\") { katex.render(texText.data, mathElements[i], { displayMode: mathElements[i].classList.contains(\"display\"), throwOnError: false, fleqn: " <> katexFlushLeft <> " } );\n }}});" nl opts H.link ! A.rel "stylesheet" ! A.href (toValue $ url ++ "katex.min.css") |