One way is to make several several passes. In the first pass you wrap all Cite elements in Span elements with a class which does not otherwise occur. In the second pass you visit Note elements and use `walk_block` to again unwrap those Span elements inside footnotes. In the third pass you use Inlines to find those Span elements elsewhere, unwrap them and adjust punctuation around the Cite.

You make a multi-pass filter script by returning an array table with several filter map tables from the script.

``````lua

local function wrap_cite (cite)

  return pandoc.Span({cite}, {class = 'is-cite'})

end

local function unwrap_cite (span)

  if span.classes:includes('is-cite') then

    return span.content[1]

  return nil

end

local unwrap_filter = { Span = unwrap_cite }

local function unwrap_in_notes (note)

  local old_blocks = pandoc.Div(note.content)

  local new_blocks = pandoc.walk_block(old_blocks, unwrap_filter)

  return pandoc.Note(new_blocks.content)

end

  

end

local function adjust_punct (inlines)

  for i=1, #inlines do

    if 'Span' == inlines[i].tag then

      local cite = unwrap_cite(inlines[i])

      if cite then

        -- move stuff around!

      end

    end

  end

  return inlines

end

return {

  { Cite = wrap_cite },

  { Note = unwrap_in_notes },

  { Inlines = adjust_punct },

}

``````

Den tors 25 nov. 2021 20:02FI Apps <ffi.appdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> skrev:

The particular case I’m dealing with is fixing a long and complex text that followed an Italian style in placing punctuation after footnotes, even though the text is in English. The script is a one-off, but since there are over 1000 footnotes, fixing it with a script is the easiest solution. Since I’m using BibLaTeX, I could tell it to move punctuation for footnotes generated with Cite, but it just swaps the footnote and the punctuation: it doesn’t move periods or commas into quotes that may precede the footnote.

The first time I wrote a script that needed to know if it was in a footnote, I resorted to the solution you suggest: I wrote a filter function for Note and used walk_block. But since this is the second script that wants to know whether or not it’s in a footnote, I thought I should mention this as a desideratum for the future.

> On 24 Nov 2021, at 18:59, John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> wrote:
>
>
> This is a limitation of the current architecture -- there's no
> way to determine the "parent" context.  Sometimes you can work
> around this by using walk_block to do a transformation inside
> a particular kind of block (e.g. a footnote) -- but in this
> case you want to do the transformation OUTSIDE of the block,
> and that's more difficult.
>
> Doesn't pandoc's --citeproc do this punctuation moving for you
> (in the case of citations automatically added as footnotes)?
> If not, try setting `notes-after-punctuation` as described in
> the manual.
>
> (If you are talking about footnotoes you insert explicitly,
> instead of citations that become footnotes, then this doesn't
> apply, but in that case why would you need to adjust the
> punctuation?)
>
> jcr <ffi.appdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>
>> I find in Lua filters that I sometimes would like to know whether or not
>> I'm in a footnote. Currently, I'm trying to move punctuation before
>> footnotes. Given my citation style, I know that a Cite in body text will
>> produce a footnote, while a Cite in a footnote will not. So I want to move
>> punctuation before a Cite when it's not in a footnote. Since a filter
>> function for Inlines will descend into footnotes as well, there doesn't
>> seem to be any way to tell when the Cite is in a footnote.
>>
>> In this particular case, I can work around the limitation because any Cite
>> in a footnote will either be the first element or will have a Space before
>> it. So with that assumption, I can look for the last innermost element
>> before the Cite and check its type: if it's a Str,  can append the
>> punctuation to it and delete the punctuation from where it was. if it's a
>> Space, I do nothing, because I must be in a footnote. However, at least in
>> the long term, I'd like to be able to tell whether or not I'm in a footnote.
>>
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