Re: xml attribute conditional

[Hans Hagen <pragma@wxs.nl>]

On 14-12-2011 19:33, Jon Crump wrote:
>>> @xml:id==string.sub('#N020-18', 2) ->
>>>      (ll.at and ll.at['xml:id'])==string.sub('#N020-18', 2) ! Missing
>>> number, treated as zero.
>>
>>
>> lua error with sub .. not sure what you want t o test here
>>
>> indeed an error will prevent the multipass file to be saved (feature)
>>
>>
>> Hans
>
> Thanks Hans, It's good to know the --result problem is not a bug, but
> a feature. My problem then arises from my use of \note as opposed to
> \footnote. In processing a<ref>  tag in the xml, I need to test if the
> current ref node has an ancestor<div>  with attribute:
> @xml:id='apr_engl'. If it does, I need to create a \footnote whose
> text comes from a<note>  element with attribute xml:id='N020-18', if
> it does not, I need to create a \note whose reference number
> corresponds to the one created by \footnote and thus points to the
> same footnote contents:
>
> <div xml:id='apr_arab'>
>      <...>
>          <ref target="#N020-18">referenced text</ref>
>      <...>
> </div>
> <div xml:id='apr_engl'>
>      <...>
>          <ref target="#N020-18">referenced text</ref>
>      <...>
> </div>
> ....
> <note xml:id='N020-18'>footnote contents</note>
>
> To result in:
>
> arabic text (1)
> english text (1)
> (1) footnote content
>
> Currently I'm getting:
>
> arabic text ??
> english text (1)
> (1) footnote content
>
> Document order problem maybe?

probably a too complex solution ... this is an alternative:


\startbuffer[test]
<text>
     <div type='a'>
         a <ref target="#N01"> a </ref>
         a <ref target="#N02"> a </ref>
     </div>
     <div type='b'>
         b <ref target="#N01"> b </ref>
         b <ref target="#N02"> b </ref>
     </div>
     <div type='c'>
         <note xml:id="N01">ONE</note>
         <note xml:id="N02">TWO</note>
     </div>
</text>
\stopbuffer

\startxmlsetups xml:somesetups
	\xmlsetsetup{#1}{text|div|ref|note}{xml:*}
	\xmlsetsetup{#1}{div[@type='a']}{xml:div:a}
	\xmlsetsetup{#1}{div[@type='b']}{xml:div:b}
	\xmlsetsetup{#1}{div[@type='c']}{xml:div:c}
\stopxmlsetups

\xmlregistersetup{xml:somesetups}

\startluacode
     function document.preprocess()
         local notes = { }
         for e in lxml.collected("main","note") do
             notes[e.at["xml:id"]] = 0
         end
         for e in lxml.collected("main","ref") do
             local target = e.at["target"]
             if target then
                 local id = string.gsub(target,"^#","")
                 local n = notes[id]
                 if n then
                     n = n + 1
                     e.at.footnote = n
                     notes[id] = n
                     e.at["xml:id"] = id
                 end
             end
         end
     end
\stopluacode

\startxmlsetups xml:text
     \ctxlua{document.preprocess()}
     \xmlflush{#1}
\stopxmlsetups

\startxmlsetups xml:div:a
     \par[div a]\par
     \xmlflush{#1}
     \par[div a]\par
\stopxmlsetups

\startxmlsetups xml:div:b
     \par[div b]\par
     \xmlflush{#1}
     \par[div b]\par
\stopxmlsetups

% \startxmlsetups xml:div:c
%     \par[div c]\par
%     \xmlflush{#1}
%     \par[div c]\par
% \stopxmlsetups
%
% \startxmlsetups xml:note
% 	[note \footnote[\letterhash\xmlatt{#1}{xml:id}]{\xmlflush{#1}}]
% \stopxmlsetups
%
% \startxmlsetups xml:ref
% 	[ref : \note[\xmlatt{#1}{target}] ]
% \stopxmlsetups

\startxmlsetups xml:div:c
\stopxmlsetups

\startxmlsetups xml:note
\stopxmlsetups

\startxmlsetups xml:ref
     \doifsomething{\xmlatt{#1}{footnote}} {
         \doifelse{\xmlatt{#1}{footnote}} {1} {
             [footnote \footnote[\xmlatt{#1}{xml:id}]{\xmlflush{#1}}]
         } {
             [note \note[\xmlatt{#1}{xml:id}]{\xmlflush{#1}}]
         }
     }
\stopxmlsetups

\starttext
     \xmlprocessbuffer{main}{test}{}
\stoptext


(if it works ... wikify it)


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                                           Hans Hagen | PRAGMA ADE
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