Re: [PATCH] Re: Update Org to MathJax 3

[Ihor Radchenko <yantar92@posteo.net>]

Rudolf Adamkovič <salutis@me.com> writes:

>> Are these extensions no longer supported?
>
> MathJax 3+ supports extensions, and one can load them in multiple ways.
> See [1].  It deserves some thinking, for the extensions mirror LaTeX
> extensions.  So, to make both HTML and PDF work, one has:
>
>   Use the Physics package in both LaTeX and MathJax.
>
>   #+latex_header: \usepackage{physics}
>   
>   #+html_head_extra: <div style="display: none">
>   #+html_head_extra:   \(
>   #+html_head_extra:     \require{physics}
>   #+html_head_extra:   \)
>   #+html_head_extra: </div>
>
> (The example taken from my Org notebook.)
>
> [1]: https://docs.mathjax.org/en/latest/input/tex/extensions.html
>
> That said, I do not currently have bandwidth to extend the scope of the
> patch to include MathJax extensions.  (Note that they have never worked
> anyway, so the user loses nothing, and we correct documentation.)

Then, please mention this in the NEWS. Something like "we drop extension
support as it never worked anyway".

> A slight digression, just FYI:
>
> I realized that I should have improved LaTeX to SVG exports instead of
> focusing on MathJax.  Org supports LaTeX environments, but outside of
> PDFs, it does so poorly.  Packages such as TikZ, for example, do not
> work out of the box, so people use Babel to hack around it.  Worse
> still, Org does not even properly adjust baselines for inline math, so
> HTML exports remain barely usable for any mathematical work.
>
> If we fix LaTeX, Org could have fast and good mathematics, with no
> JavaScript, like Wikipedia has.  Then, we could use it by default,
> instead of MathJax.
>
> Having good support for LaTeX would position Org as the king of markup
> editors, because LaTeX can do everything under the sun.  For instance,
> one can typeset a chess game in a couple of lines.  Or sheet music.  Or
> molecules in three dimensions.  No mainstream Markdown editor or web
> authoring tool can do that.  Yet, Org can *almost* do it.

Patches are always welcome ;)

> +                     (append `((,(if (plist-member options 'autonumber)
> +                                     'tags 'autonumber)
> +                                nil)
> +                               (,(if (plist-member options 'linebreaks)
> +                                     'overflow 'linebreaks)
> +                                nil))
> +                             options)))

You may even drop append and use ,@options inside `(...). Not a big deal though.

> +              (`scale
> +               (when (stringp value)
> +                 (setq value (string-to-number value)))
> +               (when (>= value 10)

If value is invalid string (not an actual number), `string-to-number'
will return 0. This may cause very strange export output I think. 

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>