Thanks, Max! That's very neat, and it indeed works in my use case.
Can anyone see any drawbacks here?
Best,
Denis
> -----Ursprüngliche Nachricht-----
> Von: Max Chernoff <mse...@telus.net>
> Gesendet: Donnerstag, 16. Juni 2022 01:32
> An: ntg-context@ntg.nl
> Cc: Maier, Denis Christian (UB) <denis.ma...@unibe.ch>
> Betreff: Re: [NTG-context] Foonotes in Captions ... again
>
> > What's the current state of affairs regarding footnotes in floats? Both
> version in the example below don't quite work...
> > (Ideally, the note should be on the page with the float and the
> > caption, but the numbering should also be adjusted.)
>
> We can completely abuse a bunch of different ConTeXt features to ensure
> that the footnote numbers are always in the page order.
>
> % New Code
> \unprotect
>
> \startluacode
> userdata.visual_order = 0
> userdata.input_order = 0
> userdata.save_data = job.passes.define("saved_footnotes")
> userdata.previous_data = job.passes.getcollected("saved_footnotes")
>
> interfaces.implement {
> name = "set_footnote_number",
> actions = function ()
> userdata.input_order = userdata.input_order + 1
>
> local input_index = userdata.input_order
> local page_index = userdata.previous_data[input_index]
>
> if page_index then
> structures.counters.set("footnote", 1, page_index - 1)
> end
> end
> }
> \stopluacode
>
> \def\save_footnote_data#1{%
> \latelua{
> userdata.visual_order = userdata.visual_order + 1
> userdata.save_data[#1] = userdata.visual_order
> }%
> }
>
> \let\old_footnote=\footnote
>
> \starttexdefinition protected footnote #1
> \begingroup
> \clf_set_footnote_number
>
> \def\insert##1\bgroup##2\egroup{
> \normalexpanded{
> \noexpand\save_footnote_data
> {\cldcontext{userdata.input_order}}
> }
> \normalinsert##1{##2}
> }
>
> \old_footnote{#1}
> \endgroup
> \stoptexdefinition
>
> \protect
>
> % Original Example
>
> \starttext
>
> \footnote{asdf} \footnote{asdf} \footnote{asdf}
>
> \input ward
>
> \startplacefigure[title={asdfasdf\footnote{test 1}}]
> \externalfigure[cow.pdf]
> \stopplacefigure
>
> \footnote{asdf} \footnote{asdf} \footnote{asdf}
>
> \startplacefigure[title={asdfasdf\footnote{test 2}}]
> \externalfigure[cow.pdf][height=10cm]
> \stopplacefigure
>
> \footnote{asdf} \footnote{asdf} \footnote{asdf}
>
>
> \page
> \footnote{asdf} \footnote{asdf} \footnote{asdf}
>
> \input ward
>
> \startplacefigure[title={asdfasdf\footnote{test 1}}]
> \externalfigure[cow.pdf]
> \stopplacefigure
>
> \footnote{asdf} \footnote{asdf} \footnote{asdf}
>
> % (Can't use postponingnotes)
> % \startpostponingnotes
> \startplacefigure[title={asdfasdf\footnote{test 2}}]
> \externalfigure[cow.pdf][height=10cm]
> \stopplacefigure
> % \stoppostponingnotes
>
> \footnote{asdf} \footnote{asdf} \footnote{asdf}
> \stoptext
>
> Here, we save a mapping between each footnote's index in the input and its
> index in the output to the .tuc file. The code is definitely not pretty, but
> works well enough for the sample file provided.
>
> -- Max
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