How to check if a link is part of a footnote?

[aubertc]

Hi!

I'm trying to improve the filter described here, that convert links to footnotes. My issue is that I don't want the link to be converted if we are already in a footnote, and I don't know how to check that the "surrounding environment" is not a footnote.

This is a bit like the opposite of walk_block, I want to apply a filter if I am not inside a pandoc.Note environment.

This question is related but unfortunately they only discuss how to do something if you are inside a block.

Thanks!

[badumont]

I would suggest the following: 1. Walk the Notes content to add a class like “noconvert” to the Links. 2. Process all Links: 2.1. If it has the “noconvert” class, just remove the class. 2.2. If it does not have it, make a footnote.

[aubertc]

Excellent, thanks a lot @badumont . I renamed the "noconvert" class to link-in-footnote, and obtained:

-- Cf.
-- https://garrit.xyz/posts/2024-04-04-pandoc-convert-links-to-footnotes-the-easy-way
-- https://github.com/jgm/pandoc/discussions/9415
-- https://github.com/jgm/pandoc/discussions/11521

function annotate_links(el)
    return el:walk {
        Link = function (el)
        el.classes:insert("link-in-footnote")
        return el
    end
    }
end

function links_as_footnotes(el)
    if el.classes:includes("link-in-footnote") then
        el.classes:remove(el.classes:find("link-in-footnotes"))
        return el
    else
        el.content:insert(pandoc.Note(pandoc.Para(pandoc.Link(el.target, el.target))))
        return el.content
    end
end

return {
    {Note = annotate_links},
    {Link = links_as_footnotes}
}

feedback, if you have any, welcome!