[NTG-context] Re: Own command definition breaks with interaction: Use of \do_my_command doesn't match its definition

[Wolfgang Schuster <wolfgang.schuster.lists@gmail.com>]

Gerion Entrup schrieb am 25.01.2024 um 09:18:
> Hi,
> 
> I want to make a proper definition of a new command to be able to
> process it in Lua. I found something on StackOverflow [1] but that
> breaks in enumeration _and_ when interaction is enabled and I do not
> understand why? Can you give me some help here?
> 
> I want to make commands like \foo{bla} and \foo[b]{bla} possible at the
> same time. Here is a minimal example (also attached):
> 
> ```
> \startluacode
> function userdata.my_command(keywords, text)
> 	commands.writestatus("test", string.format("text: %s, config: %s", text, keywords))
>      local cfg = utilities.parsers.settings_to_hash(keywords)
> 
> 	if cfg['emph'] ~= nil then
> 		context("\\emph{" .. text .. "}")
> 	elseif cfg['bold'] ~= nil then
> 		context("\\bold{" .. text .. "}")
> 	else
> 		context(text)
> 	end
> end
> \stopluacode

\startluacode
function userdata.my_command(keywords, text)
   local keywords = utilities.parsers.settings_to_hash(keywords)
   if keywords['emph'] then
     context.emph(text)
   elseif keywords['bold'] then
     context.bold(text)
   else
     context(text)
   end
end
\stopluacode

> % without that line there is no problem
> \setupinteraction[state=start]
> 
> \defineenumeration[enu][text=Enu]

\defineenumeration[enu][text=Enu,title=yes]

> \unprotect
> \def\mc{\dosingleempty\do_my_command}
> \def\do_my_command[#1]#2{%
>   	\iffirstargument{%
> 		\ctxlua{userdata.my_command('#1', [==[#2]==])}%
> 	}\else {%
> 		\ctxlua{userdata.my_command('', [==[#2]==])}%
> 	}\fi
> }
> \protect

\tolerant\protected\def\mc[#1]#2%
   {\ctxlua{userdata.my_command("#1","#2")}}

Wolfgang
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