[NTG-context] xml syntax for \externalfigure

Hans Hagen pragma at wxs.nl
Sat Jun 4 00:24:34 CEST 2011


On 4-6-2011 12:14, Peter Münster wrote:
> On Fri, Jun 03 2011, Thomas A. Schmitz wrote:
>
>> Ah, expdoifelse is for "expanded doifelse," right? Any examples for such a lua
>> helper? Sounds good, but I still haven't been able to understand how to mix
>> xml and lua code.
>
> \startluacode
> function my_externalfigure(file, t)
>      local args_present
>      for k, v in pairs(t) do
>          if v == "" then
>              t[k] = nil
>          else
>              args_present = true
>          end
>      end
>      context.externalfigure({file}, args_present and t)
> end
> \stopluacode
>
> \startxmlsetups xml:externalfigure
>    \ctxlua{my_externalfigure("\xmlatt{#1}{resource}",
>      {width = "\xmlatt{#1}{width}", height = "\xmlatt{#1}{height}"})}
> \stopxmlsetups
>
> My first idea was "\expanded{\externalfigure[...][\doif...]}" but it
> does not work...

you can consider passing #1 and using lxml.att at the lua end or go even 
further and pop in your own finalizer

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------


More information about the ntg-context mailing list