Re: ox-html: exporting LaTeX-environments

[Thibault Marin]

Hi Vitus, list.

My memory is quite fuzzy on this and I won't have a chance to take a
deep look until later, but I will try to share the information I have.

On Mon, 11 Apr 2022 19:38:13 +0000 (9 hours, 37 minutes, 37 seconds ago), Vitus 
Schäfftlein <vitusschaefftlein@live.de> wrote:

  Dear org-mode mailing list,

  [...]

  3. Any LaTeX environment name foo is changed to foo* (except it already ends 
with an
   asterisk). For example, \begin{tabular} is changed to \begin{tabular*}; same 
for
   \end{tabular}. But tabular* differs from tabular in needing an extra 
width-argument, so
   the export won’t work properly.

I had submitted a patch trying to address this
(https://list.orgmode.org/87h7ok3qi2.fsf@dell-desktop.WORKGROUP/, I have
attached a new version rebased on main to this message).  It never made
it in and I failed to follow-up.  This patch (or something similar)
could help with this issue.  It basically only adds the star for math
environments (using org-html--math-environment-p)

  [...]

  Now the newline commands \n before and after %s are exported as whitespace. 
Just replacing
  \n%s\n by %s (that is, leaving the newlines out) solves the problem. HTML 
ignores newlines
  anyway.

This seems to work better indeed; the \n's were just cosmetic.

  [...]

  1 Create a new variable ox-html-latex-environments-no-number of the form 
("foo"
   "bar" "baz" ...), which contains all environments that should not receive 
equation
   numbers.

I don't know whether org-html--math-environment-p (as used in the
attached patch) is sufficient to determine whether we need to add a star
to the environment or if we need another variable (in my use cases,
testing for a match environment is sufficient but it may not be the case
in general).

  [...]

  I don’t know how to express in elisp what is in brackets, though. Does this 
make sense to you? I
  am a beginner with elisp, so I can only state the ideas I have but not 
implement them (yet).

This can be made to work if there is a consensus that we want to add a
ox-html-latex-environments-no-number variable (I can try to help with
that if needed, even though my elisp isn't great)

  [...]

  (let ((formula-link
              (org-html-format-latex
               (org-html--unlabel-latex-environment latex-frag)
               processing-type info)))

The patch should address that, I would be curious to see if you
encounter additional problematic cases after applying it.

Thanks for resurrecting this and for your help detecting and fixing the issues.

Best,

thibault

0001-lisp-ox-html.el-Fix-automatic-numbering-of-non-math-.patch
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