Re: [PATCH] Don't fill displayed equations

[Stefan Nobis]

Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:

> Also, I don't think LaTeX treats it as a block element.
> E.g.,
>
>     text
>     \[1+1=3\]
>     text
>
> is a single paragraph in LaTeX.

Yes and no. LaTeX is a bit more complex and does not only see inline
or block elements. It has paragraph mode (and inner paragraph mode
like \parbox, which does not allow page breaks), vertical mode, LR
mode, math mode and within math mode there is inline math style
and display math style (and some more little details I forgot).

But still, the equation in the example is in display math style and it
is typeset as a separate line. Additionally, as far as I remember,
with processing "\]" LaTeX leaves math mode, typesets the necessary
vertical space, and switches back to paragraph mode. Then, if an empty
line (or the command "\par") is encountered, the marking of a new
paragraph is typeset (e.g. using "\parindent" and "\parskip"), else
normal output resumes.

Therefore, I would argue, LaTeX modes are not really comparable to Org
element types (inline or block).

See also the following LaTeX code:

--8<---------------cut here---------------start------------->8---
\documentclass{article}
\begin{document}
text\par text\\ and more text
\end{document}
--8<---------------cut here---------------end--------------->8---

Here, with an Org point of view, one may say, this is a single block
or paragraph. But LaTeX will typeset two paragraphs in three lines
(and internally stays the whole time in paragraph mode, if I correctly
remember the small fragments I once learned about the LaTeX kernel).

> If it's a block element, you cannot write \[...\] mid-line.

Hmm... so maybe, it's really worth to have both (\[...\] as inline
element and the \begin{equation*}...\end{equation*} block). I'm
undecided. :)

But thanks for your explanations!

-- 
Until the next mail...,
Stefan.