$ symbol in Display Math #7942
Comments
|
I believe the real issue here is the |
|
it's actually mhchem's control sequence Thanks for your answer~ I have another reproducable case as following: tmp.md $$
\begin{align}
This is $\text{Hello World}$
\end{align}
$$sh pandoc --lua-filter=filters\texsvg.lua -s 'tmp.md' -o tmp.html -f commonmark_xtmp.html ...
<p>$$ \begin{align} This is <span class="math inline">Hello World</span>
\end{align} $$</p>
... |
|
if there's no $ in double-$ like this, then it will be treated as DisplayMath well... $$
\begin{align}
This is Hello World
\end{align}
$$<p><span class="math display">$$
\begin{align}
This is Hello World
\end{align}
$$</span></p>$ is needed in several packages(chemfig, mhchem) ever since they donot support non-ascii? chars and i have to use math-mode \text{} or other stuff to quote those chars... currently i have to change all these code to CodeBlock, which is really a big stuff |
|
This isn't valid LaTeX, though: $$
\begin{align}
This is $\text{Hello World}$
\end{align}
$$Try that with pdflatex. |
sorry for that wrong example.... anyway $ in \ce or \chemfig directly is valid for latex but not in pandoc. |
|
I found something interesting: markdown: $$
\schemestart
\chemfig{*6([0,.5]------)} \arrow{->[$\text{Hello}$]}
\schemestop
$$
sh 1<p><span class="math display">$$
\schemestart
\chemfig{*6([0,.5]------)} \arrow{->[$\text{Hello}$]}
\schemestop
$$</span></p>sh 2<p>$$ \schemestart \chemfig{*6([0,.5]——)} \arrow{->[<span
class="math inline">Hello</span>]} \schemestop $$</p>what cause the problem? the code above is valid latex as expanded: \documentclass[12pt,preview]{standalone}
\usepackage{ctex}
\usepackage[version=4]{mhchem}
\usepackage{chemfig}
\usepackage[libertine]{newtxmath}
\begin{document}
\begin{preview}
\title{Hello World}
\author{Hoarfroster}
\schemestart
\chemfig{*6([0,.5]------)} \arrow{->[$\text{Hello}$]}
\schemestop
\end{preview}
\end{document} |
|
mhchem isn't supported yet; see #6668 and give the filter there a try. |
|
OK, now I understand your issue better. The |
|
I'm going to transfer this to commonmark-hs, because that's where the issue lies. |
...embedded inline math. See jgm/pandoc#7942. Note, however, that there's a larger issue this doesn't solve. For in principle you could have embedded math in inline math, e.g. ``` $\text{hi $x$ there}$ ``` Pandoc's markdown parser gets this right, but that's because it uses a LaTeX tokenizer.
|
I've added a fix for this in commonmark-extensions, but it's not perfect. Looking back at pandoc's LaTeX reader, I see that we have code that counts groupings: dollarsMath :: PandocMonad m => LP m Inlines
dollarsMath = do
symbol '$'
display <- option False (True <$ symbol '$')
(do contents <- try $ untokenize <$> pDollarsMath 0
if display
then mathDisplay contents <$ symbol '$'
else return $ mathInline contents)
<|> (guard display >> return (mathInline ""))
-- Int is number of embedded groupings
pDollarsMath :: PandocMonad m => Int -> LP m [Tok]
pDollarsMath n = do
tk@(Tok _ toktype t) <- anyTok
case toktype of
Symbol | t == "$"
, n == 0 -> return []
| t == "\\" -> do
tk' <- anyTok
(tk :) . (tk' :) <$> pDollarsMath n
| t == "{" -> (tk :) <$> pDollarsMath (n+1)
| t == "}" ->
if n > 0
then (tk :) <$> pDollarsMath (n-1)
else mzero
_ -> (tk :) <$> pDollarsMath nThis could be ported over to commonmark-hs. |
...embedded inline math. See jgm/pandoc#7942. Note, however, that there's a larger issue this doesn't solve. For in principle you could have embedded math in inline math, e.g. ``` $\text{hi $x$ there}$ ``` Pandoc's markdown parser gets this right, but that's because it uses a LaTeX tokenizer.
That‘s it...thx for addressing the problem~ |
0.2.3.3 * Fix definition_lists extension (#96). We were not properly consuming indentation in definitions, which caused problems when the definitions themselves contained lists. 0.2.3.2 * Update lower version bounds for commonmark (#93, David Thrane Christiansen). 0.2.3.1 * math extension: don't fail when display math contains embedded inline math. See jgm/pandoc#7942. * Make math parsing more sophisticated. Count embeddings inside {..}, since math can contain e.g. \text{...} which itself contains math delimiters. * Small improvement in pipe table parsing. The old parser failed on some edge cases with extra whitespace after pipes (which we should just ignore). * fancy_list extension: improve list type ambiguity resolution (#89).
Explain the problem.
I've made a filter to convert Math into svg with lua + latex + dvisvgm, and since latex cannot recognize CJK chars in either mhchem or chemfig, i have to quote these chars with \text{}, but since this is a math-mode control sequence, i have to quote it with $$ again...
Now with the quoted latex code it works in latex parser, but rise a new problem: pandoc seems to parse inline-math first than display-math, causing the whole latex code not parsed and the output is like this:
Reproduce
tmp.md:
shell command:
Pandoc version?
pandoc.exe 2.17.1.1
Compiled with pandoc-types 1.22.1, texmath 0.12.4, skylighting 0.12.2,
citeproc 0.6.0.1, ipynb 0.2
User data directory: C:\Users\Hoarfroster\AppData\Roaming\pandoc
Copyright (C) 2006-2022 John MacFarlane. Web: https://pandoc.org
This is free software; see the source for copying conditions. There is no
warranty, not even for merchantability or fitness for a particular purpose.
The text was updated successfully, but these errors were encountered: