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Re: caption width in LateX export

From: Sebastian P . Luque
Subject: Re: caption width in LateX export
Date: Mon, 27 Dec 2021 11:16:03 -0600
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)

On Mon, 27 Dec 2021 13:28:08 +0000,
Juan Manuel Macías <maciaschain@posteo.net> wrote:

> Sebastian P. Luque writes:
>> Thank you, Juan.  Unfortunately, there is a price for this solution
>> as it is now impossible to name and refer to this segment as usual:

> I see. Have you tried the option with LuaTeX that I put in my other
> message? You can compile with LuaTeX also using latexmk:

> (setq org-latex-pdf-process '("latexmk -lualatex -e
> '$lualatex=q/lualatex %%O -shell-escape %%S/' %f"))

I haven't tried this yet, but it's great to know latexmk can use LuaTex.

> In any case, since this is a simple substitution, you can use also a
> function in Elisp as a final output filter[1]:

> #+BIND: org-export-filter-final-output-functions (caption-auto-width)
> #+begin_src emacs-lisp :exports results :results none

>   (defun caption-auto-width (text backend info) (when
> (org-export-derived-backend-p backend 'latex) (with-temp-buffer
> (insert text) (save-excursion (goto-char (point-min)) (while
> (re-search-forward "\\(\\\\includegraphics.+\\)" nil t) (replace-match
> "\\\\sbox0{\\1}" t nil))) (save-excursion (goto-char (point-min))
> (while (re-search-forward "\\(\\\\caption.+\\)" nil t) (replace-match
> "\\\\begin{minipage}{\\\\wd0}\\\\usebox0\\1\\\\end{minipage}" t nil)))
> (setq text (buffer-string))))) #+end_src

> Vid. [[fig:1]]

> #+NAME: fig:1 #+CAPTION: Lorem ipsum dolor sit amet, consectetuer
> adipiscing elit. Donec hendrerit tempor tellus. Donec pretium posuere
> tellus

> #+ATTR_LaTeX: :width .3\linewidth [[my-image.jpg]]

> [1] You need to set this variable as non-nil, in order to use bind
> keywords: (setq org-export-allow-bind-keywords t)

> Hope this works,

This is great, and very interesting to learn about the BIND keyword.

Thank you,

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