On 11/07/2022 03:23, Juan Manuel Macías wrote:
3. A variable (something like 'org-latex-fontspec-default-configuration') would
return something like this:
(format
\\usepackage{iftex}
\\ifpdftex
I like the idea of unified preamble suitable for pdflatex and lualatex.
For pdftex \usepackage[...]{fontenc} line may be added here.
\\relax
\\else
Is it the case of latex as the old engine with tex->dvi->ps workflow
besides new XeTeX and LuaTeX? However such engine is not used by Org.
\\usepackage{fontspec}
\\usepackage{unicode-math}
\\defaultfontfeatures{Scale=MatchLowercase}
\\defaultfontfeatures[\\rmfamily]{Ligatures=TeX}
\\setmainfont{%s}
\\setsansfont{%s}
\\setmonofont{%s}
\\fi
org-latex-fontspec-mainfont
org-latex-fontspec-sansfont
org-latex-fontspec-monofont)
Too many variables to my taste. It can be single property list. If I
remember correctly, changing of mainfont requires setting of a
consistent font for mathematics, so more options may be required.
ox-latex has some code searching for e.g. \usepackage[...]{inputenc} in
the current configuration to avoid adding of extra copy. It would be
great to have something similar for fontspec commands. I guess, it is
harder to detect, since per-language font configuration may be required
as babel options.
Finally, default value may be language-dependent or alternative font set
may be activated when non-latin characters are detected in the document.
