[NTG-context] Access current element in xmlsetsetup via xml.expressions

[Taco Hoekwater]

> On 1 Oct 2019, at 21:24, achim at jander.de wrote:
> 
> Hello,
> I’m trying to build an xmlsetsetup with an own lua function. XML in MKIV says on pg. 33:
> You can also use normal Lua functions as long as you make sure that you pass the right arguments.
> There are a few predefined variables available inside such functions.
> list table the list of matches
> l number the current index in the list of matches
> ll element the current element that matched
> order number the position of the root of the path
>  
> But I can’t figure out how to get access to list, ll etc.

Neither can I :(

Taco

> My MWE (only for testing the access, is always true):
>  
> \startbuffer[text]
> <para>Dies ist <inline style="sup">ein</inline> xxx<inline style="sub">zwei</inline> noch ein <inline style="sup">sup</inline> Test<inline style="sub">sub</inline></para>
> \stopbuffer
> %\enabletrackers[xml.parse,xml.path]
>  
> \startluacode
>   function xml.expressions.nextnodeatt(e)
>                 inspect(e)
>                 inspect(ll)
>                 return('sub')
>   end
> \stopluacode
>  
> \startxmlsetups xml:textsetups
>     \xmlsetsetup{#1}{*}{+}
>     \xmlsetsetup{#1}{para}{xml:*}
>     \xmlsetsetup{#1}{inline[@style='sup'][xml.expressions.nextnodeatt(ll)=='sub']}{xml:sub}
> \stopxmlsetups
>  
> \xmlregistersetup{xml:textsetups}
>  
> \startxmlsetups xml:para
>     \xmlflush{#1}\par
> \stopxmlsetups
>  
> \startxmlsetups xml:sub
>     \color[red]{\xmlflush{#1}}
> \stopxmlsetups
>  
>  
> \starttext
>     \xmlprocessbuffer{main}{text}{}
> \stoptext
>  
> Thanks in advance,
> Achim
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Taco Hoekwater
Elvenkind BV