[NTG-context] use of preceding-sibling in xmlsetsetup

Hans Hagen pragma at wxs.nl
Tue Oct 20 22:30:42 CEST 2015


On 10/20/2015 11:48 AM, massifr at fastwebnet.it wrote:
> Here's the (complete) code:
>
> \startbuffer[test]
> <text>
>    <p class="incipit">Dear list,</p>
>    <p class="dopo-incipit">this paragraph should not be indented, because it follows the “incipit”
>    of the letter.</p>
>    <p>This one and the following ones should be indented.</p>
>    <p>You may question whether “Dear list,” should be a paragraph of his own,
>    but my text is already formatted like that and I can’t do anything
>    about it.</p>
> </text>
> \stopbuffer
>
> \startxmlsetups xml:somesetups
>    \xmlsetsetup{#1}{text}{xml:text}
>    \xmlsetsetup{#1}{p}{xml:p}
>    \xmlsetsetup{#1}{p[@class='incipit']}{xml:p:noindent}
>    % the following lpath expression does not work
>    % \xmlsetsetup{#1}{p[reverse-sibling::p[1]/attribute('class') == 'incipit']}{xml:p:noindent}
> \stopxmlsetups

\xmlsetsetup{#1}{p/reverse-sibling::p[1][@class=='incipit']/following-sibling::p[1]}{xml:p:noindent}

or

\xmlsetsetup{#1}{p/reverse-sibling::p[position()==1 and 
@class=='incipit']/following-sibling::p[1]}{xml:p:noindent}

> \xmlregistersetup{xml:somesetups}
>
> \startxmlsetups xml:text
>    \indenting[{yes,first,12pt}]
>    \xmlflush{#1}
> \stopxmlsetups
>
> \startxmlsetups xml:p
>    \doif{\xmlattribute{#1}{reverse-sibling::p[1]}{class}}{incipit}{\noindent}
>    \xmlflush{#1}\par
> \stopxmlsetups
>
> \startxmlsetups xml:p:noindent
>    \noindent\xmlflush{#1}\par
> \stopxmlsetups
>
> \starttext
>    \xmlprocessbuffer{main}{test}{}
> \stoptext
>
> It's the example of the original message of this thread, with the
> modifications posted in the second message.
>
> In the \startxmlsetups section I tried to put that condition in a
> \xmlsetsetup, but I commented it out because it did not work.
>
> Here's where I found an example with reverse-sibling:
> https://www.mail-archive.com/ntg-context%40ntg.nl/msg77364.html
> I was searching for "sibling" in the mailing list archive to see whether
> "sibling expressions" had been implemented.
>
> Greetings,
> Massi
>
>>> On 10/17/2015 11:19 AM, mf wrote:
>>>> "reverse-sibling" is ConTeXt specific and very useful: it's a "reversed
>>>> preceding-sibling", so that you find the nearest sibling at index [1].
>>>> I've used it successfully in a \doif statement, but I failed in
>>>> translating it in a \xmlsetsetup statement, to tell ConTeXt: "this
>>>> setup is for an element p whose nearest preceding sibling p has class
>>>> 'incipit'".
>>>
>>> In that case, why don't you show the code where you've used it
>>> successfully and maybe we can take it from there.
>>>
>>> Thomas
>>>
>
> ___________________________________________________________________________________
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>
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> ___________________________________________________________________________________
>


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