Modify syntax-highlighted code blocks with lua filter

Modify syntax-highlighted code blocks with lua filter

[Bart]

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Greetings,

I am working on an application that uses markdown and supports code blocks. 
We also let users mark fragments of code blocks as if with a yellow marker.

We currently have a lua filter that does the marking, but it does not work 
in combination with syntax highlighting. It never returns the CodeBlock and 
so the highlighter is never called. I have determined that in order to make 
the two work together, I need to take the following steps:

- determine where the marking is supposed to go
- remove the [mark] tags and send the code block to the highlighter
- insert the marking in the resulting highlighted code.

However, I have not found a way to access highlighted code, or call the 
highlighter, from a lua filter. Is there a way to do that or is my plan 
doomed to failure?

I am also open to other suggestions.

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Re: Modify syntax-highlighted code blocks with lua filter

[John MacFarlane]

You can't do that from a filter, because highlighting is added
by the writer.

Bart <bart.hijmans-df9nrXIP1oRmR6Xm/wNWPw@public.gmane.org> writes:

> Greetings,
>
> I am working on an application that uses markdown and supports code blocks. 
> We also let users mark fragments of code blocks as if with a yellow marker.
>
> We currently have a lua filter that does the marking, but it does not work 
> in combination with syntax highlighting. It never returns the CodeBlock and 
> so the highlighter is never called. I have determined that in order to make 
> the two work together, I need to take the following steps:
>
> - determine where the marking is supposed to go
> - remove the [mark] tags and send the code block to the highlighter
> - insert the marking in the resulting highlighted code.
>
> However, I have not found a way to access highlighted code, or call the 
> highlighter, from a lua filter. Is there a way to do that or is my plan 
> doomed to failure?
>
> I am also open to other suggestions.
>
> -- 
> 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/88f14d06-7079-4330-a7ad-a9a3d9b0e4c8n%40googlegroups.com.

Re: Modify syntax-highlighted code blocks with lua filter

[Bart Hijmans]

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Ok, that's what I thought. I guess we'll have to choose either/or. Thanks.

On Tue, Mar 30, 2021 at 6:12 PM John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> wrote:

>
> You can't do that from a filter, because highlighting is added
> by the writer.
>
> Bart <bart.hijmans-df9nrXIP1oRmR6Xm/wNWPw@public.gmane.org> writes:
>
> > Greetings,
> >
> > I am working on an application that uses markdown and supports code
> blocks.
> > We also let users mark fragments of code blocks as if with a yellow
> marker.
> >
> > We currently have a lua filter that does the marking, but it does not
> work
> > in combination with syntax highlighting. It never returns the CodeBlock
> and
> > so the highlighter is never called. I have determined that in order to
> make
> > the two work together, I need to take the following steps:
> >
> > - determine where the marking is supposed to go
> > - remove the [mark] tags and send the code block to the highlighter
> > - insert the marking in the resulting highlighted code.
> >
> > However, I have not found a way to access highlighted code, or call the
> > highlighter, from a lua filter. Is there a way to do that or is my plan
> > doomed to failure?
> >
> > I am also open to other suggestions.
> >
> > --
> > 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/88f14d06-7079-4330-a7ad-a9a3d9b0e4c8n%40googlegroups.com
> .
>

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