Nick Dokos <ndo...@gmail.com> writes: > Lawrence Bottorff <borg...@gmail.com> writes: > >> ... I use >> >> # this makes MathJax work >> #+OPTIONS: tex:t >> >> I just now found this caption weirdness because I started a new .org >> file with no latex symbol markup besides in the caption. Quite >> bizarre that when my file sees other latex symbols, the caption >> symbols then render correctly. >> > >> On Wed, Sep 13, 2017 at 6:55 PM, Nick Dokos <ndo...@gmail.com> wrote: >> >> Nicolas Goaziou <m...@nicolasgoaziou.fr> writes: >> >> > Hello, >> > >> > Lawrence Bottorff <borg...@gmail.com> writes: >> > >> >> Consider this markup: >> >> >> >> ------------ >> >> * MATHEMATICS AUXILIARY >> >> >> >> ** deriving sines and cosines >> >> >> >> #+caption: Right triangle with two $\pi\big/4$ angles. >> >> [[file:images/45-45-triangle.png]] >> >> >> >> $\big/$ >> >> ------------ >> >> >> >> If I remove the second $\big/$, the first latex, $\pi\big/4$, in the >> >> caption will not properly render on export to html. Include it and >> both >> >> render just fine. Without the second, the first looks like this: >> >> >> >> Figure 1: Right triangle with two \(\pi\big/4\) angles. >> >> >> >> Is this a bug? >> > >> > If you use >> > >> > #+options: tex:dvipng >> > >> > the symbol in the caption is correctly rendered. It may be a bug in >> Mathjax. >> > >> >> I looked at the diff between html files produced with and without the >> $\big/$ addition. >> The one without does not include any of the mathjax configuration code >> at all. Is that >> code included conditionally perhaps when a latex construct is seen? >> Maybe the latex construct >> in the caption does not trigger the inclusion? >> >> -- >> Nick >> > > org-html--build-mathjax-config includes the mathjax code only if > > (and (memq (plist-get info :with-latex) '(mathjax t)) > (org-element-map (plist-get info :parse-tree) > '(latex-fragment latex-environment) 'identity info t)) > > is true.
I guess we didn’t want to load extra JS unless it’s needed. > So if there is latex markup in the file (other than the caption) the > org-element-map > call finds it and returns non-nil, but it apparently does not look inside the > caption. When org-element looks at something like "#+caption: a $b$" it sees a keyword. I don’t know if it’s possible to check explicitly whether it contains maths. Alternatively, we could check if :with-latex is explicitly set in the buffer (like in ox-koma-letter) and then load it regardless. Rasmus -- This is the kind of tedious nonsense up with which I will not put