Smart math rendering in HTML

Smart math rendering in HTML

[Julien Dutant]

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Hi all!

Pandoc is already very smart, but I'd like to make it even smarter when 
rendering math that can/cannot be handled by MathJax or others. 

I have to render a bunch of markdown files in both LaTeX and HTML, and some 
of them rely on special latex packages (xymatrix, bussproofs, fitch, ...) 
that MathJax, codecogs.org and others can't process. Ideally, I would want 
to my pandoc conversion to pre-render the TeX as images when it is 
necessary, but only when necessary. 

My default plan is this: manually mark up the maths environments that need 
to be pre-rendered (native span or div with class "prerender"), and process 
those with a lua filter along the lines of the diagram filter. 
<https://pandoc.org/lua-filters.html#building-images-with-tikz> 

Ideally of course I'd like pandoc to figure out by itself whether 
pre-rendering is needed. Even if that significantly slowed down processing, 
e.g. because pandoc would itself run every formula through the target 
renderer and check whether it returns an error code. And even if that was 
only available for one rendering method (MathJax).

Is the default plan the best feasible right now? Is the smart solution 
something that could be done at all?

Any suggestions welcome!

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Re: Smart math rendering in HTML

[John MacFarlane]

Julien Dutant <julien.dutant-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> Ideally of course I'd like pandoc to figure out by itself whether 
> pre-rendering is needed. Even if that significantly slowed down processing, 
> e.g. because pandoc would itself run every formula through the target 
> renderer and check whether it returns an error code. And even if that was 
> only available for one rendering method (MathJax).

Pandoc won't do that.  But you could have a filter do that.

Re: Smart math rendering in HTML

[Julien Dutant]

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Thanks! I'll get on with the simple manual-markup filter first. For a 
smarter one I guess I'd need a way of doing dry-runs of MathJax and get 
error codes when some math isn't processed. The API documentation for v3 
isn't up yet, but from a quick look a v2 I didn't spot an easy way to do it.
On Friday, November 27, 2020 at 9:42:24 PM UTC John MacFarlane wrote:

> Julien Dutant <julien...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>
> > Ideally of course I'd like pandoc to figure out by itself whether 
> > pre-rendering is needed. Even if that significantly slowed down 
> processing, 
> > e.g. because pandoc would itself run every formula through the target 
> > renderer and check whether it returns an error code. And even if that 
> was 
> > only available for one rendering method (MathJax).
>
> Pandoc won't do that. But you could have a filter do that.
>
>

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