[NTG-context] Re: Combine \setupdelimitedtext with an author (define custom variable?)

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

Gerion Entrup schrieb am 06.06.2024 um 12:30:
> Hi,
> 
> I like to achieve something that looks like this:
> ```
> \definedelimitedtext[extract][blockquote]
> \setupdelimitedtext
>    [extract]
>    [leftmargin=1.5pc,
>     style={\italic},
>     before={\setupindenting[next]},
>     after={\blank[1ex] \hrule \blank[1ex] \startalignment[flushright] \tfx\italic{René Descartes} \stopalignment}]
> 
> \starttext
> \startextract
>      Cogito ergo sum.
> \stopextract
> \stoptext
> ```
> 
> So it should setup a quotation and mentions the author.
> However, here the author is hardcoded within the blockquote. I would like it to use like this:
> ```
> \definedelimitedtext[extract][blockquote]
> \setupdelimitedtext
>    [extract]
>    [leftmargin=1.5pc,
>     style={\italic},
>     before={\setupindenting[next]},
>     after={\blank[1ex] \hrule \blank[1ex] \startalignment[flushright] \tfx\italic{\getcustomvariable{author}} \stopalignment}]
> 
> \starttext
> \startextract[author=René Descartes]
>      Cogito ergo sum.
> \stopextract
> \stoptext
> ```
> 
> Is there an easy way to achieve that?
> I tried with \structureuservariable (like possible in \startchapter) but it does not work.

\startsetups [userdata:extract]
     \startnarrower
         \setupindenting[next]
         \getuserdata
         \hairline
         \dontleavehmode\wordright{\itx\userdataparameter{author}}
     \stopnarrower
\stopsetups

\defineuserdataalternative
   [extract]
   [renderingsetup=userdata:extract]

\defineuserdata
   [extract]
   [style=italic,
    alternative=extract]

\starttext

\startextract[author=René Descartes]
     Cogito ergo sum.
\stopextract

\stoptext

Wolfgang
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