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KaTeX math: respect classoption=fleqn variable

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closes #5815
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mb21 2019-10-13 20:05:57 +02:00 committed by John MacFarlane
parent b976486f1f
commit bfbff3106d
2 changed files with 12 additions and 2 deletions
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6
MANUAL.txt
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@ -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].

8
src/Text/Pandoc/Writers/HTML.hs
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@ -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")