Pablo Rodriguez schrieb am 20.04.2020 um 18:55:
Dear list,
I have the following sample:
\startbuffer[demo]
<doc>
<section id="section-i1">
<text>first</text>
</section>
<section id="section-i2">
<text>second</text>
</section>
</doc>
\stopbuffer
\startxmlsetups xml:initialize
\xmlsetsetup{#1}{doc|section}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:initialize}
\startxmlsetups xml:doc
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\startsection[title={\xmlatt{#1}{id}},
beforesection={\doif{\xmlatt{#1}{id}}{\selectedtopic}
{conditional}}]
\xmlflush{#1}
\doif{\xmlatt{#1}{id}}{\selectedtopic}{conditional}
\stopsection
\stopxmlsetups
\def\selectedtopic{section-i1}
\starttext
\xmlprocessbuffer{main}{demo}{}
\stoptext
How can I make the conditional in the beforesection option work?
The argument of the beforesection-key is placed before ConTeXt stores
the values of \startsection which means you can do it this way.
What you can do here is to put whatever something in a macro before you
call \startsection and access the value of this macro with the
beforesection-key. You should ensure the content if this temporary macro
is cleared when your conditional is false.
\setuphead
[section]
[beforesection=\getvariable{xml}{beforesection}]
\startxmlsetups xml:section
\doifelse{\xmlatt{#1}{id}}{\selectedtopic}
{\setvariable{xml}{beforesection}{conditional}}
{\setvariable{xml}{beforesection}{}}
\startsection[title={\xmlatt{#1}{id}}]
\xmlflush{#1}
\stopsection
\stopxmlsetups
Wolfgang
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