Re: Can math elements have attributes

[Julien Dutant <julien.dutant-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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I'd check out if there's an extension flag 
(https://pandoc.org/MANUAL.html#extensions) you can add to commonmark_x 
input for it to process multiline attributes. Or one that can be added to 
markdown to process math attributes.

As the Pandoc AST doesn't have attributes on Math elements 
(https://pandoc.org/lua-filters.html#type-math) the common mark reader 
turns them into attributes of a container Span element, as your output 
shows. So an alternative would be to simply write the span in Pandoc's 
markdown by simply adding a backtick before and after:

`$$x = 1+2$$`{ .cs #math:equation caption=test} 

`$x = 1+2$ `{ .cs #math:equation caption=test} 

~~~{
  .cs 
  #lst:my-listing 
  caption=test } 
def f(x): 
   return x
~~~

Writing a Lua filter that picks up either is also an option. Picking up 
attributes list after equations is probably a bit complicated. But using 
pattern matching to process the initial {...} in a code block is more 
feasible. 

All the best,

On Wednesday, February 22, 2023 at 8:15:53 AM UTC A A wrote:

> Anyone? I also opened an issue in Github but no response.
>
> On Fri, 17 Feb 2023 at 12:01, A A <amine.ab...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>> Dear all,
>>
>> Having not received a response to my query below, I ran a few of my own 
>> tests to try to understand what is going on. 
>>
>> It seems that commonmark_x *does* recognize attributes for both inline 
>> and display math. If I have the following in my markdown file:
>>
>> $$x = 1+2$${ .cs #math:equation caption=test}
>>
>> $x = 1+2${ .cs #math:equation caption=test}
>>
>> ~~~{
>>   .cs 
>>   #lst:my-listing 
>>   caption=test
>>   }
>> def f(x):
>>     return x
>> ~~~
>>
>> And I run pandoc --from commonmark_x --to native test.md I will get the 
>> following:
>>
>> [ Para
>>     [ Span
>>         ( "math:equation" , [ "cs" ] , [ ( "caption" , "test" ) ] )
>>         [ Math DisplayMath "x = 1+2" ]
>>     ]
>> , Para
>>     [ Span
>>         ( "math:equation" , [ "cs" ] , [ ( "caption" , "test" ) ] )
>>         [ Math InlineMath "x = 1+2" ]
>>     ]
>> , CodeBlock
>>     ( "" , [ "{" ] , [] )
>>     "  .cs \n  #lst:my-listing \n  caption=test\n  }\ndef f(x):\n    return x"
>> ]
>>
>> Notice that the multiline attributes for the CodeBlock element are not 
>> picked up. If I instead try pandoc --from markdown --to native test.md:
>>
>> [ Para
>>     [ Math DisplayMath "x = 1+2"
>>     , Str "{"
>>     , Space
>>     , Str ".cs"
>>     , Space
>>     , Str "#math:equation"
>>     , Space
>>     , Str "caption=test}"
>>     ]
>> , Para
>>     [ Math InlineMath "x = 1+2"
>>     , Str "{"
>>     , Space
>>     , Str ".cs"
>>     , Space
>>     , Str "#math:equation"
>>     , Space
>>     , Str "caption=test}"
>>     ]
>> , CodeBlock
>>     ( "lst:my-listing" , [ "cs" ] , [ ( "caption" , "test" ) ] )
>>     "def f(x):\n    return x"
>> ]
>>
>>
>> The attributes in the CodeBlock element *are* picked up, but the 
>> attributes for display and inline math are not.
>>
>> Unfortunately, for my use case I would like to be able to assign 
>> multiline attributes to code block elements *and* assign attributes to 
>> display and inline math elements.
>>
>> Is there a way to achieve both in the same markdown file? Thanks for your 
>> consideration.
>>
>> Regards,
>>
>> Amine
>>
>> ---------- Forwarded message ---------
>> From: A A <amine.ab...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>> Date: Wed, 8 Feb 2023 at 13:52
>> Subject: Can math elements have attributes
>> To: <pandoc-...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
>>
>>
>> Dear all,
>>
>> I am writing my own pandoc to latex converter using panflute and would 
>> like to attach attributes to Math elements. I have tried the following 
>> syntax, but it seems that the attribute is not being picked up by panflute:
>>
>> ```
>> $$x=y$${ a=b }
>> ```
>>
>> I did some of my own research to figure out what I was doing wrong. And a 
>> couple of things became apparent:
>>
>> - On the one hand, it looks like pandoc might not support this:
>>     - https://github.com/jgm/pandoc/issues/684
>>     - https://github.com/jgm/pandoc/issues/5286
>> - On the other hand, `pandoc-crossref` seems to be able to handle this 
>> syntax:
>>     - https://github.com/lierdakil/pandoc-crossref
>>     - https://lierdakil.github.io/pandoc-crossref/#equation-labels
>>
>> Is this currently supported by pandoc? If not then how is 
>> `pandoc-crossref` able to handle it? Thanks for your consideration.
>>
>> Regards,
>>
>> Amine
>>
>>
>>

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