* [NTG-context] LMTX: Command handling, Interface between TeX and Lua
@ 2023-12-13 17:13 Gerion Entrup
2023-12-13 20:57 ` [NTG-context] " Bruce Horrocks
0 siblings, 1 reply; 3+ messages in thread
From: Gerion Entrup @ 2023-12-13 17:13 UTC (permalink / raw)
To: ntg-context
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Hi,
I'd like to understand more of the inner workings of LMTX.
When I understand it right, most of the code is now processed in Lua but
I was not able to find it.
For example, I tried to find out how setupitemgroup is handled (just as
an example of a more complex command). The wiki has a (kind of)
autogenerated description:
https://wiki.contextgarden.net/Command/setupitemgroup
I found the data for this (at least this is my guess) here:
tex/texmf-context/tex/context/interface/mkiv/i-itemgroup.xml
Are these xml files created by hand or somehow generated? Now, when I
use `\setupitemgroup[itemize:1][symbol=3,itemalign=middle]`: How are the
arguments handled and is this a generic process or specific to each
command?
Is there a simple way to define a new command/environment and handle
the keyword arguments in Lua? For example defining a frontend command
like this:
\startsomething[firstword={Some},secondword={Text}]
Body
\stopsomething
which I can handle in some lua code like this:
function something(firstword, secondword, body)
tex.print(firstword)
tex.print(secondword)
tex.print(body)
end
Are there any resources beside the context code itself where I can learn
that?
Gerion
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___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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^ permalink raw reply [flat|nested] 3+ messages in thread
* [NTG-context] Re: LMTX: Command handling, Interface between TeX and Lua
2023-12-13 17:13 [NTG-context] LMTX: Command handling, Interface between TeX and Lua Gerion Entrup
@ 2023-12-13 20:57 ` Bruce Horrocks
2023-12-14 13:10 ` Gerion Entrup
0 siblings, 1 reply; 3+ messages in thread
From: Bruce Horrocks @ 2023-12-13 20:57 UTC (permalink / raw)
To: ntg-context mailing list
> On 13 Dec 2023, at 17:13, Gerion Entrup <gerion.entrup@flump.de> wrote:
>
> Is there a simple way to define a new command/environment and handle
> the keyword arguments in Lua? For example defining a frontend command
> like this:
I don't have the answer to your other questions but I do have an example for this one.
It's not mine - I'm fairly sure it came from this list but I can't find who that was any more.
\startluacode
userdata = userdata or { }
function userdata.mycommand(keywords, keyvals, str)
keyword_options = utilities.parsers.settings_to_array(keywords)
named_values = utilities.parsers.settings_to_hash(keyvals)
context('First option = ' .. keyword_options[1])
context('\\par')
context('Color chosen = ' .. named_values['color'])
context('\\par')
context('Curly braces = ' .. str)
context('\\par')
end
\stopluacode
\def\mycommand[#1][#2]#3{\ctxlua{
userdata.mycommand('#1', '#2', [==[#3]==])}}
\starttext
\mycommand[top, inmargin, now][color=green, roof=gabled]{Anne of Green Gables?}
\stoptext
—
Bruce Horrocks
Hampshire, UK
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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archive : https://github.com/contextgarden/context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 3+ messages in thread
* [NTG-context] Re: LMTX: Command handling, Interface between TeX and Lua
2023-12-13 20:57 ` [NTG-context] " Bruce Horrocks
@ 2023-12-14 13:10 ` Gerion Entrup
0 siblings, 0 replies; 3+ messages in thread
From: Gerion Entrup @ 2023-12-14 13:10 UTC (permalink / raw)
To: ntg-context mailing list
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Am Mittwoch, 13. Dezember 2023, 21:57:35 CET schrieb Bruce Horrocks:
>
> > On 13 Dec 2023, at 17:13, Gerion Entrup <gerion.entrup@flump.de> wrote:
> >
> > Is there a simple way to define a new command/environment and handle
> > the keyword arguments in Lua? For example defining a frontend command
> > like this:
>
> I don't have the answer to your other questions but I do have an example for this one.
> It's not mine - I'm fairly sure it came from this list but I can't find who that was any more.
>
> \startluacode
> userdata = userdata or { }
>
> function userdata.mycommand(keywords, keyvals, str)
> keyword_options = utilities.parsers.settings_to_array(keywords)
> named_values = utilities.parsers.settings_to_hash(keyvals)
>
> context('First option = ' .. keyword_options[1])
> context('\\par')
> context('Color chosen = ' .. named_values['color'])
> context('\\par')
> context('Curly braces = ' .. str)
> context('\\par')
> end
> \stopluacode
>
> \def\mycommand[#1][#2]#3{\ctxlua{
> userdata.mycommand('#1', '#2', [==[#3]==])}}
>
> \starttext
> \mycommand[top, inmargin, now][color=green, roof=gabled]{Anne of Green Gables?}
> \stoptext
Thank you. That helps a lot already!
Gerion
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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive : https://github.com/contextgarden/context
wiki : https://wiki.contextgarden.net
___________________________________________________________________________________
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2023-12-13 20:57 ` [NTG-context] " Bruce Horrocks
2023-12-14 13:10 ` Gerion Entrup
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