Hello,
Juan Manuel Macías <maciasch...@posteo.net> writes:
> I am writing a custom parse tree filter that does the following (LaTeX
> backend): if a heading has the ':font:' property, the content of that
> heading is enclosed in a LaTeX group. If the property is ':fontfeature:',
> then the content is enclosed in a different group. The filter works fine
> when all the headings are at the same level. But with different levels,
> it does not returns the expected result. It's evident that I'm doing
> something catastrophically wrong :-). I wonder if anyone could put me on
> the track of the origin of my error...
>
> Below, the offender function and a sample. Thanks in advance!
I think you are operating at the wrong level. Higher level headlines
contain lower level ones. I suggest to operate on sections instead.
Also, using `org-element-interpret-data' is meh because you're operating
at the parse tree level. You can insert export-snippet objects directly.
Here's a proposal. This could be refactored, but you get the idea.
--8<---------------cut here---------------start------------->8---
(defun my-custom-filters/fontspec-headline (tree backend info)
(when (org-export-derived-backend-p backend 'latex)
(org-element-map tree 'section
(lambda (section)
(let ((font (org-export-get-node-property :FONT section t))
(fontfeature (org-export-get-node-property :FONTFEATURE section
t))
(create-export-snippet
;; Create "latex" export-snippet with value V.
(lambda (v)
(org-element-create 'export-snippet (list :back-end "latex"
:value v)))))
(cond
(font
(apply #'org-element-set-contents
section
(append (list (funcall create-export-snippet "%font
start\n"))
(org-element-contents section)
(list (funcall create-export-snippet "%font
end\n")))))
(fontfeature
(apply #'org-element-set-contents
section
(append (list (funcall create-export-snippet "%fontfeature
start\n"))
(org-element-contents section)
(list (funcall create-export-snippet "%fontfeature
end\n"))))))))
info)
tree))
--8<---------------cut here---------------end--------------->8---
Also, when "org-cite-wip" is merged, you will be able to replace, e.g.,
(funcall create-export-snippet "%fontfeature start\n")
with
(org-export-raw-string "%fontfeature start\n")
Regards,
--
Nicolas Goaziou
