From: Stephan Boltzmann <stephan2boltzmann-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: pandoc-discuss <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
Subject: Re: Modifying metadata elements with Lua filter
Date: Fri, 16 Jun 2023 03:09:34 -0700 (PDT) [thread overview]
Message-ID: <af26503b-81f1-49eb-9f55-ac4186358c3cn@googlegroups.com> (raw)
In-Reply-To: <CADAJKhBGcd4TracBv-Xy_K4-sx_Qy688WZCcZNa1+cU0Yc4Daw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
[-- Attachment #1.1: Type: text/plain, Size: 5247 bytes --]
Thanks a lot for your solution.
With your help and the logging module, programming Lua filters for Pandoc
is starting to be fun and I came up with this solution by myself:
function Meta (m)
if FORMAT:match 'docx' then
authors = pandoc.List:new()
for i, author in ipairs(m.author) do
if m.author[i] then
authors = authors .. author .. {pandoc.Str(', ')}
else
authors = authors .. author
end
end
m.author = pandoc.MetaInlines(authors)
end
return m
end
BPJ schrieb am Donnerstag, 15. Juni 2023 um 18:35:18 UTC+2:
> It is better to not hard code the number of authors:
>
> ``````lua
> function Meta (meta)
> if 'docx' == FORMAT then
> if 'List' ~= pandoc.utils.type(meta.author) then
> -- hopefully Inlines
> return nil
> elseif 1 == #meta.author then -- only one
> meta.author = meta.author[1]
> else -- more than one
> -- Define once, use many times
> local sep = pandoc.Inlines(", ") -- DWIM
> -- Initialize to an empty list and use `:extend` to populate
> local authors = pandoc.Inlines({ })
> -- Loop through any number of authors
> for i, author in ipairs(meta.author) do
> if 1 == i then -- no comma for the first
> authors:extend(author)
> else -- append ", A. U. Thor"
> authors:extend(sep .. author)
> end
> end
> -- Put them back
> meta.author = authors
> -- We have modified, so return it
> return meta
> end
> end
> return nil -- nothing modified
> end
> ``````
>
> Den tors 15 juni 2023 17:18Stephan Boltzmann <stephan2...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> skrev:
>
>> Thanks a lot for your help, which enabled me to write the following short
>> filter, which puts the name of all authors on the same line in 'docx'
>> output, while preserving the nice default layout in 'latex' output.
>> Debugging filters working on the yaml metadata provided a particular
>> challenge to me:
>>
>> function Meta (m)
>> if FORMAT:match 'docx' then
>> authors = m.author[1] .. {pandoc.Str(', ')} .. m.author[2]
>> m.author = pandoc.MetaInlines(authors)
>> end
>> return m
>> end
>>
>> It only handles two and not more authors, but in my case, that's fine.
>> William Lupton schrieb am Mittwoch, 14. Juni 2023 um 18:55:04 UTC+2:
>>
>>> Your metadata has this structure (hmm... perhaps some of the Inlines are
>>> really MetaInlines, in which case that's a problem with my logging module):
>>>
>>> (#) meta Meta {
>>> author: List[2] {
>>> [1] Inlines[3] {
>>> [1] Str "Author"
>>> [2] Space
>>> [3] Str "A"
>>> }
>>> [2] Inlines[3] {
>>> [1] Str "Author"
>>> [2] Space
>>> [3] Str "B"
>>> }
>>> }
>>> title: Inlines[1] {
>>> [1] Str "Test"
>>> }
>>> }
>>>
>>> ... so I think you want this filter (MetaInlines isn't an attribute
>>> name, and you have to count the space):
>>>
>>> function Meta (m)
>>> print(pandoc.utils.stringify(m.author[1][3]))
>>> end
>>>
>>> On Wed, 14 Jun 2023 at 17:47, Stephan Boltzmann <stephan2...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>>> wrote:
>>>
>>>> Hello everybody out there using Pandoc,
>>>>
>>>> For the following short document,
>>>> ---
>>>> title: Test
>>>> author:
>>>> - Author A
>>>> - Author B
>>>> ---
>>>> # Introduction
>>>>
>>>> I would expect the Lua filter
>>>>
>>>> function Meta (m)
>>>> print(pandoc.utils.stringify(m.author[1].MetaInlines[2]))
>>>> end
>>>>
>>>> to print out "A", but it prints nothing at all.
>>>>
>>>> What is the conceptual misunderstanding I have here?
>>>>
>>>> --
>>>> 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 pandoc-discus...-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
>>>> To view this discussion on the web visit
>>>> https://groups.google.com/d/msgid/pandoc-discuss/19962c60-238b-4ef4-bad6-a8200ca9a3cen%40googlegroups.com
>>>> <https://groups.google.com/d/msgid/pandoc-discuss/19962c60-238b-4ef4-bad6-a8200ca9a3cen%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 pandoc-discus...-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
>>
> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/pandoc-discuss/64f0f40b-5c49-47fa-97f5-f824735f6cebn%40googlegroups.com
>> <https://groups.google.com/d/msgid/pandoc-discuss/64f0f40b-5c49-47fa-97f5-f824735f6cebn%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 pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/af26503b-81f1-49eb-9f55-ac4186358c3cn%40googlegroups.com.
[-- Attachment #1.2: Type: text/html, Size: 9690 bytes --]
prev parent reply other threads:[~2023-06-16 10:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-14 16:47 Stephan Boltzmann
[not found] ` <19962c60-238b-4ef4-bad6-a8200ca9a3cen-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
2023-06-14 16:54 ` 'William Lupton' via pandoc-discuss
[not found] ` <CAEe_xxgBZqBv5xT85kirY0WoBS3VJZy8R36f7hQxp5sZo38nSA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2023-06-15 15:17 ` Stephan Boltzmann
[not found] ` <64f0f40b-5c49-47fa-97f5-f824735f6cebn-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
2023-06-15 16:35 ` BPJ
[not found] ` <CADAJKhBGcd4TracBv-Xy_K4-sx_Qy688WZCcZNa1+cU0Yc4Daw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2023-06-16 10:09 ` Stephan Boltzmann [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=af26503b-81f1-49eb-9f55-ac4186358c3cn@googlegroups.com \
--to=stephan2boltzmann-re5jqeeqqe8avxtiumwx3w@public.gmane.org \
--cc=pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).