Please see the updated filter attached!

Le Sunday 27 November 2022 à 08:24:43AM, user account a écrit :
> Ok, gotcha! Could you point me to an example of how that page number could be
> printed somewhere?
>
> My goal is this, HTML:
> <p>Here's text with <a href="/some-blog-post">anchor text</a>.</p>
>
> Becomes a paragraph in the pdf document:
> Here's text with anchor text[1].
>
> And then in the footer, is a footnote:
> 1) See <scripted caption> one page #7.
>
> ...where page 7 is the where the /some-blog-post is now located in this pdf.
>
> Does that make sense?
>
> On Sunday, November 27, 2022 at 10:50:14 AM UTC-5 Bastien Dumont wrote:
>
> My filter only shows how one can inject raw code to get references by page
> number in LaTeX. Without any example, I don't really understand what you
> say about footnotes and so on, but the basic mechanism is here, now you can
> adapt the filter to your needs.
>
> Le Sunday 27 November 2022 à 06:13:53AM, user account a écrit :
> > oh a 'filters' subdir! Thanks. So now the pdf gets created w/o error, but
> there
> > are not footnotes.
> >
> > neither of these:
> > pandoc -L links-with-page-number.lua -o test.pdf test.html
> > pandoc -V links-as-notes -L links-with-page-number.lua -o test.pdf
> > test.html
> > ...creates pdf w/ footnotes, so there's no footnote to contain the page
> number
> > of the linked-to page.
> >
> > Something undesireable does happen though... I changed the paragraph with
> the
> > link to:
> > <p>Here is a link to <a href="#thetarget">important words about the
> target</a>.
> > </p>
> > ...and the "important words about the target" get removed altogether.
> Those
> > should not be removed, just the <a> tags around them should be removed.
> >
> > Thanks for the help so far. I'm excited to see a lua filter in action for
> my
> > first time. Very curious about the api... I presume pandoc is looking for
> > functions with particular names like Link and Span? Would you mind
> > confirming... this [1]https://pandoc.org/lua-filters.html#type-link is
> the proper
> > spot in the docs for referencing Link in this context... right?
> >
> > I imagine this working example produce footnotes w/ page numbers for you
> in
> > your environment...? Any idea what I could inspect to try to get it
> working in
> > mine?
> > On Sunday, November 27, 2022 at 3:57:02 AM UTC-5 Bastien Dumont wrote:
> >
> > Place the file under `~/.local/share/pandoc/filters`. You don't need the
> > executable flag.
> >
> > Le Saturday 26 November 2022 à 02:30:58PM, user account a écrit :
> > > Thanks I wish that worked. I don't know what I'm doing wrong, here's
> what
> > I've
> > > got…
> > >
> > > `pandoc --version` says user data dir is `~/.local/share/pandoc` so I
> > placed
> > > this file there as `~/.local/share/pandoc/links-with-page-number.lua`
> and
> > did
> > > (just in case) `chmod +x` on it.
> > >
> > > `pandoc -o test.pdf test.html` produces a 2page pdf as expected with no
> > > footnotes.
> > >
> > > `pandoc -L links-with-page-number.lua -o test.pdf test.html` fails to
> > produce
> > > pdf file with:
> > > ```
> > > Error running filter links-with-page-number.lua:
> > > links-with-page-number.lua: openBinaryFile: does not exist (No such
> file
> > or
> > > directory)
> > > ```
> > >
> > > There's no typo in my script name or command invocation. Using ~
> /.pandoc
> > > instead of ~/.local/share/pandoc doesn't make any difference, still get
> > that
> > > same error.
> > >
> > > Any ideas?
> > >
> > > On Saturday, November 26, 2022 at 12:34:15 PM UTC-5 Bastien Dumont
> wrote:
> > >
> > > Please find attached a basic implementation. As in the attached sample
> > HMTL
> > > file, I suppose that the targets are marked with ids on spans and that
> > you
> > > link to it via empty <a> elements. If you have a LaTeX installation,
> > simply
> > > do `pandoc -L links-with-page-number.lua -o test.pdf test.html` to see
> > the
> > > result.
> > >
> > > Le Saturday 26 November 2022 à 05:21:25AM, user account a écrit :
> > > > Thanks! Yeah injecting html in the intermediary document doesn't
> sound
> > > very
> > > > promising either (again, because the pages have to be built first
> > before
> > > > footnotes updated with page #s) so maybe I'll abandon weasyprint in
> > this
> > > case,
> > > > if this would be easy to do with a *Tex pdf engine. In that case...
> how
> > > would
> > > > one go about this? Would a lua filter be more capable with a
> different
> > > pdf
> > > > engine or would a different mechanism be used?
> > > >
> > > > On Saturday, November 26, 2022 at 5:28:31 AM UTC-5 Bastien Dumont
> > wrote:
> > > >
> > > > The problem is that Pandoc does not produce the PDF document: it
> > produces
> > > > the intermediary HTML document that is processed by weasyprint to
> > produce
> > > > the PDF. So you cannot get page numbers in a Lua filter.
> > > >
> > > > However, you can inject raw HTML code in the intermediary file (or in
> > > your
> > > > CSS) that will make weasyprint print the page numbers. The question
> is
> > > > whether such HTML code exists. It certainly would be possible to do
> > this
> > > if
> > > > you converted to PDF via LaTeX, ConTeXt or groff, but I don't know if
> > it
> > > is
> > > > possible via weasyprint.
> > > >
> > > > Le Friday 25 November 2022 à 04:33:05PM, user account a écrit :
> > > > > Using pandoc with weasyprint pdf engine to turn the markdown files
> > from
> > > a
> > > > blog
> > > > > (static site generator does the html conversion) into a pdf for
> > print.
> > > > >
> > > > > Would it be possible, perhaps with a custom lua filter or some
> other
> > > > mechanism,
> > > > > to add the page number of the linked-to page? The page numbers
> won't
> > be
> > > > known
> > > > > until pandoc has already created the document, and I don't know
> where
> > > in
> > > > 'the
> > > > > pipeline' the lua filter intervenes compared to when the pages
> > > exist...?
> > > > And
> > > > > If the pages exist with their numbers earlier enough, is there an
> > > object
> > > > or
> > > > > something from which lua can get the page number?
> > > > >
> > > > > I haven't found anything about page numbers in [1][1][1]https://
> > [2]pandoc.org
> > > /
> > > > > lua-filters.html#module-pandoc.utils ...am I looking in the wrong
> > > place?
> > > > Can
> > > > > anyone tell me anything about this?
> > > > >
> > > > > It's an intimidating rabbit hole for me, particularly because I see
> > no
> > > > mention
> > > > > of "page number" there in the docs, which makes it seem kinda
> > hopeless
> > > > > actually. But maybe one of you know the way and could point me in
> > that
> > > > > direction?
> > > > >
> > > > > --
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> > > an
> > > > email
> > > > > to [1]pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org.
> > > > > To view this discussion on the web visit [2][2][2]https://
> > > [2][3]groups.google.com/
> > > > d/msgid/
> > > > > pandoc-discuss/a93afb43-c939-40c1-868f-1db8eded17d8n%[3]
> > > > [3][3][4]40googlegroups.com.
> > > > >
> > > > > References:
> > > > >
> > > > > [1] mailto:pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
> > > > > [2] [4][4][4][5]https://groups.google.com/d/msgid/pandoc-discuss/
> > > > a93afb43-c939-40c1-868f-1db8eded17d8n%[5][5][6]40googlegroups.com?
> > utm_medium=
> > > email&
> > > > utm_source=footer
> > > >
> > > >
> > > > --
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> send
> > an
> > > email
> > > > to [5]pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org.
> > > > To view this discussion on the web visit [6][6][6]https://
> > [7]groups.google.com/
> > > d/msgid/
> > > > pandoc-discuss/2aec84ad-a750-48f2-a0c2-ad7572dcca11n%[7]
> > > [7][8]40googlegroups.com.
> > > >
> > > > References:
> > > >
> > > > [1] [8][8][9]https://pandoc.org/
> > > > [2] [9][9][10]https://groups.google.com/d/msgid/
> > > > [3] [10][10][11]http://40googlegroups.com/
> > > > [4] [11][11][12]https://groups.google.com/d/msgid/pandoc-discuss/
> > > a93afb43-c939-40c1-868f-1db8eded17d8n%[12][13]40googlegroups.com?
> utm_medium=
> > email&
> > > utm_source=footer
> > > > [5] mailto:pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
> > > > [6] [12][13][14]https://groups.google.com/d/msgid/pandoc-discuss/
> > > 2aec84ad-a750-48f2-a0c2-ad7572dcca11n%[14][15]40googlegroups.com?
> utm_medium=
> > email&
> > > utm_source=footer
> > >
> > >
> > > --
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> an
> > email
> > > to [13]pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org.
> > > To view this discussion on the web visit [14][15]https://
> > [16]groups.google.com/d/msgid/
> > > pandoc-discuss/480d0274-2324-43d7-9f74-1bbfc08fcbd0n%[16]
> > [17]40googlegroups.com.
> > >
> > > References:
> > >
> > > [1] [17][18]https://pandoc.org/
> > > [2] [18][19]https://groups.google.com/
> > > [3] [19][20]http://40googlegroups.com/
> > > [4] [20][21]https://groups.google.com/d/msgid/pandoc-discuss/
> > > [5] [21][22]http://40googlegroups.com/?utm_medium=email&
> > > [6] [22][23]https://groups.google.com/d/msgid/
> > > [7] [23][24]http://40googlegroups.com/
> > > [8] [24][25]https://pandoc.org/
> > > [9] [25][26]https://groups.google.com/d/msgid/
> > > [10] [26][27]http://40googlegroups.com/
> > > [11] [27][28]https://groups.google.com/d/msgid/pandoc-discuss/
> > a93afb43-c939-40c1-868f-1db8eded17d8n%[29]40googlegroups.com?utm_medium=
> email&
> > utm_source=footer
> > > [12] [28][30]https://groups.google.com/d/msgid/pandoc-discuss/
> > 2aec84ad-a750-48f2-a0c2-ad7572dcca11n%[31]40googlegroups.com?utm_medium=
> email&
> > utm_source=footer
> > > [13] mailto:pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
> > > [14] [29][32]https://groups.google.com/d/msgid/pandoc-discuss/
> > 480d0274-2324-43d7-9f74-1bbfc08fcbd0n%[33]40googlegroups.com?utm_medium=
> email&
> > utm_source=footer
> >
> >
> > --
> > You received this message because you are subscribed to the Google Groups
> > "pandoc-discuss" group.
> > To unsubscribe from this group and stop receiving emails from it, send an
> email
> > to [30]pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org.
> > To view this discussion on the web visit [31][34]https://
> groups.google.com/d/msgid/
> > pandoc-discuss/e969f1ca-c6bf-4a5e-b53f-86aa0a444db2n%[35]
> 40googlegroups.com.
> >
> > References:
> >
> > [1] [36]https://pandoc.org/
> > [2] [37]http://groups.google.com/
> > [3] [38]http://40googlegroups.com/
> > [4] [39]https://groups.google.com/d/msgid/pandoc-discuss/
> > [5] [40]http://40googlegroups.com/?utm_medium=
> > [6] [41]https://groups.google.com/
> > [7] [42]http://40googlegroups.com/
> > [8] [43]https://pandoc.org/
> > [9] [44]https://groups.google.com/d/msgid/
> > [10] [45]http://40googlegroups.com/
> > [11] [46]https://groups.google.com/d/msgid/pandoc-discuss/
> > [12] [47]http://40googlegroups.com/?utm_medium=email&
> > [13] [48]https://groups.google.com/d/msgid/pandoc-discuss/
> > [14] [49]http://40googlegroups.com/?utm_medium=email&
> > [15] [50]https://groups.google.com/d/msgid/
> > [16] [51]http://40googlegroups.com/
> > [17] [52]https://pandoc.org/
> > [18] [53]https://groups.google.com/
> > [19] [54]http://40googlegroups.com/
> > [20] [55]https://groups.google.com/d/msgid/pandoc-discuss/
> > [21] [56]http://40googlegroups.com/?utm_medium=email&
> > [22] [57]https://groups.google.com/d/msgid/
> > [23] [58]http://40googlegroups.com/
> > [24] [59]https://pandoc.org/
> > [25] [60]https://groups.google.com/d/msgid/
> > [26] [61]http://40googlegroups.com/
> > [27] [62]https://groups.google.com/d/msgid/pandoc-discuss/
> a93afb43-c939-40c1-868f-1db8eded17d8n%40googlegroups.com?utm_medium=email&
> utm_source=footer
> > [28] [63]https://groups.google.com/d/msgid/pandoc-discuss/
> 2aec84ad-a750-48f2-a0c2-ad7572dcca11n%40googlegroups.com?utm_medium=email&
> utm_source=footer
> > [29] [64]https://groups.google.com/d/msgid/pandoc-discuss/
> 480d0274-2324-43d7-9f74-1bbfc08fcbd0n%40googlegroups.com?utm_medium=email&
> utm_source=footer
> > [30] mailto:pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
> > [31] [65]https://groups.google.com/d/msgid/pandoc-discuss/
> e969f1ca-c6bf-4a5e-b53f-86aa0a444db2n%40googlegroups.com?utm_medium=email&
> utm_source=footer
>
>
> --
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> to [66]pandoc-discus...@googlegroups.com.
> To view this discussion on the web visit [67]https://groups.google.com/d/msgid/
> pandoc-discuss/858c5a07-89a0-4daa-803f-e0d9d50ca9c6n%40googlegroups.com.
>
> References:
>
> [1] https://pandoc.org/lua-filters.html#type-link
> [2] http://pandoc.org/
> [3] http://groups.google.com/
> [4] http://40googlegroups.com/
> [5] https://groups.google.com/d/msgid/pandoc-discuss/
> [6] http://40googlegroups.com/
> [7] http://groups.google.com/
> [8] http://40googlegroups.com/
> [9] https://pandoc.org/
> [10] https://groups.google.com/d/msgid/
> [11] http://40googlegroups.com/
> [12] https://groups.google.com/d/msgid/pandoc-discuss/
> [13] http://40googlegroups.com/?utm_medium=
> [14] https://groups.google.com/d/msgid/pandoc-discuss/
> [15] http://40googlegroups.com/?utm_medium=
> [16] http://groups.google.com/d/msgid/
> [17] http://40googlegroups.com/
> [18] https://pandoc.org/
> [19] https://groups.google.com/
> [20] http://40googlegroups.com/
> [21] https://groups.google.com/d/msgid/pandoc-discuss/
> [22] http://40googlegroups.com/?utm_medium=email&
> [23] https://groups.google.com/d/msgid/
> [24] http://40googlegroups.com/
> [25] https://pandoc.org/
> [26] https://groups.google.com/d/msgid/
> [27] http://40googlegroups.com/
> [28] https://groups.google.com/d/msgid/pandoc-discuss/
> [29] http://40googlegroups.com/?utm_medium=email&
> [30] https://groups.google.com/d/msgid/pandoc-discuss/
> [31] http://40googlegroups.com/?utm_medium=email&
> [32] https://groups.google.com/d/msgid/pandoc-discuss/
> [33] http://40googlegroups.com/?utm_medium=email&
> [34] https://groups.google.com/d/msgid/
> [35] http://40googlegroups.com/
> [36] https://pandoc.org/
> [37] http://groups.google.com/
> [38] http://40googlegroups.com/
> [39] https://groups.google.com/d/msgid/pandoc-discuss/
> [40] http://40googlegroups.com/?utm_medium=
> [41] https://groups.google.com/
> [42] http://40googlegroups.com/
> [43] https://pandoc.org/
> [44] https://groups.google.com/d/msgid/
> [45] http://40googlegroups.com/
> [46] https://groups.google.com/d/msgid/pandoc-discuss/
> [47] http://40googlegroups.com/?utm_medium=email&
> [48] https://groups.google.com/d/msgid/pandoc-discuss/
> [49] http://40googlegroups.com/?utm_medium=email&
> [50] https://groups.google.com/d/msgid/
> [51] http://40googlegroups.com/
> [52] https://pandoc.org/
> [53] https://groups.google.com/
> [54] http://40googlegroups.com/
> [55] https://groups.google.com/d/msgid/pandoc-discuss/
> [56] http://40googlegroups.com/?utm_medium=email&
> [57] https://groups.google.com/d/msgid/
> [58] http://40googlegroups.com/
> [59] https://pandoc.org/
> [60] https://groups.google.com/d/msgid/
> [61] http://40googlegroups.com/
> [62] https://groups.google.com/d/msgid/pandoc-discuss/a93afb43-c939-40c1-868f-1db8eded17d8n%40googlegroups.com?utm_medium=email&utm_source=footer
> [63] https://groups.google.com/d/msgid/pandoc-discuss/2aec84ad-a750-48f2-a0c2-ad7572dcca11n%40googlegroups.com?utm_medium=email&utm_source=footer
> [64] https://groups.google.com/d/msgid/pandoc-discuss/480d0274-2324-43d7-9f74-1bbfc08fcbd0n%40googlegroups.com?utm_medium=email&utm_source=footer
> [65] https://groups.google.com/d/msgid/pandoc-discuss/e969f1ca-c6bf-4a5e-b53f-86aa0a444db2n%40googlegroups.com?utm_medium=email&utm_source=footer
> [66] mailto:pandoc-discus...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
> [67] https://groups.google.com/d/msgid/pandoc-discuss/858c5a07-89a0-4daa-803f-e0d9d50ca9c6n%40googlegroups.com?utm_medium=email&utm_source=footer