* issue with lpath
@ 2022-08-02 19:14 Pablo Rodriguez via ntg-context
2022-08-03 7:09 ` Taco Hoekwater via ntg-context
0 siblings, 1 reply; 9+ messages in thread
From: Pablo Rodriguez via ntg-context @ 2022-08-02 19:14 UTC (permalink / raw)
To: ConTeXt users; +Cc: Pablo Rodriguez
Dear list,
I have this sample:
\startbuffer[demo]
<xml>
<div class="section level3">
<h3>One</h3>
<p>Standard paragraph</p>
<blockquote>
<p>Quoted text</p>
</blockquote>
</div>
<div class="section level3">
<h3>Two</h3>
<blockquote>
<p>Direct quote</p>
</blockquote>
</div>
</xml>
\stopbuffer
\startxmlsetups xml:initialize
\xmlsetsetup{#1}
{p|blockquote}
{xml:*}
\xmlsetsetup{#1}
{(div|section)[contains(@class,'level3')]/h3/../!p/../h3}
{xml:section}
\stopxmlsetups
\xmlregistersetup{xml:initialize}
\startxmlsetups xml:p
\startpar\xmlflush{#1}\stoppar
\stopxmlsetups
\startxmlsetups xml:blockquote
\startblockquote\xmlflush{#1}\stopblockquote
\stopxmlsetups
\startxmlsetups xml:section
\section{\xmlflush{#1}}
\stopxmlsetups
\starttext
\xmlprocessbuffer{main}{demo}{}
\stoptext
I need an lpath to select the h3 node above, but only the one with "h3 +
blockquote" as a CSS selector (which could be added the lpath "../h3"
after).
It would be "<h3>Two</h3>" and not "<h3>Two</h3>" in this sample.
Excuse my ignorance, but which is the way to achieve this?
Many thanks for your help,
Pablo
___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: issue with lpath 2022-08-02 19:14 issue with lpath Pablo Rodriguez via ntg-context @ 2022-08-03 7:09 ` Taco Hoekwater via ntg-context 2022-08-03 13:54 ` Pablo Rodriguez via ntg-context 0 siblings, 1 reply; 9+ messages in thread From: Taco Hoekwater via ntg-context @ 2022-08-03 7:09 UTC (permalink / raw) To: mailing list for ConTeXt users; +Cc: Taco Hoekwater, Pablo Rodriguez > On 2 Aug 2022, at 21:14, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote: > > Dear list, > > > I need an lpath to select the h3 node above, but only the one with "h3 + > blockquote" as a CSS selector (which could be added the lpath "../h3" > after). Lpath supports CSS selectors between curly braces as parts, so simply: \xmlsetsetup{#1}{{h3 + blockquote}/../h3} {xml:section} should do. The xml-mkiv.pdf manual has lots of other lpath examples as well. Best wishes, Taco — Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns) ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: issue with lpath 2022-08-03 7:09 ` Taco Hoekwater via ntg-context @ 2022-08-03 13:54 ` Pablo Rodriguez via ntg-context 2022-08-04 10:22 ` Taco Hoekwater via ntg-context 0 siblings, 1 reply; 9+ messages in thread From: Pablo Rodriguez via ntg-context @ 2022-08-03 13:54 UTC (permalink / raw) To: Taco Hoekwater via ntg-context; +Cc: Pablo Rodriguez On 8/3/22 09:09, Taco Hoekwater via ntg-context wrote: >> On 2 Aug 2022, at 21:14, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote: >> [...] >> I need an lpath to select the h3 node above, but only the one with "h3 + >> blockquote" as a CSS selector (which could be added the lpath "../h3" >> after). > > Lpath supports CSS selectors between curly braces as parts, so simply: > > \xmlsetsetup{#1}{{h3 + blockquote}/../h3} {xml:section} Taco, I knew that, but I wasn’t sure how to mix both. I’d say yesterday I tried something similar to: \xmlsetsetup{#1}{{h3 + blockquote}../h3} {xml:section} Which, of course, couldn’t work. > The xml-mkiv.pdf manual has lots of other lpath examples as well. I know, I have read them many times. And I read them from time to time. But I’m not smart enough to understand them. BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua? Something like "/h3/../!p/../blockquote" selected both "h3 + p" (which I didn’t want and "h3 + blockquote" (the one intended). Many thanks for your help, Pablo ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: issue with lpath 2022-08-03 13:54 ` Pablo Rodriguez via ntg-context @ 2022-08-04 10:22 ` Taco Hoekwater via ntg-context 2022-08-04 14:07 ` Hans Hagen via ntg-context 2022-08-04 15:15 ` Pablo Rodriguez via ntg-context 0 siblings, 2 replies; 9+ messages in thread From: Taco Hoekwater via ntg-context @ 2022-08-04 10:22 UTC (permalink / raw) To: mailing list for ConTeXt users; +Cc: Taco Hoekwater, Pablo Rodriguez > On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote: > > BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua? I was wondering about that as well, and I really had no clue how to do that. Some reading and studying later, I realised that there is a preceding-sibling:: axis. That is not documented in xml-mkiv.pdf I think, but it inherited from xpath, and that means this works: \xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section} “Take all blockquotes, then tests their immediate preceding siblings (index [-1]) that are h3." But the CSS version is nicer. Still, both solutions fail on generic input. Sorry, out of clues Best wishes,Taco — Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns) ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: issue with lpath 2022-08-04 10:22 ` Taco Hoekwater via ntg-context @ 2022-08-04 14:07 ` Hans Hagen via ntg-context 2022-08-04 15:32 ` Taco Hoekwater via ntg-context 2022-08-04 15:15 ` Pablo Rodriguez via ntg-context 1 sibling, 1 reply; 9+ messages in thread From: Hans Hagen via ntg-context @ 2022-08-04 14:07 UTC (permalink / raw) To: mailing list for ConTeXt users Cc: Hans Hagen, Pablo Rodriguez, Taco Hoekwater On 8/4/2022 12:22 PM, Taco Hoekwater via ntg-context wrote: > > >> On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote: >> >> BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua? > > > I was wondering about that as well, and I really had no clue how to do that. Some > reading and studying later, I realised that there is a preceding-sibling:: axis. > > That is not documented in xml-mkiv.pdf I think, but it inherited from xpath, and that means this works: > > \xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section} > > “Take all blockquotes, then tests their immediate preceding siblings (index [-1]) that are h3." > > But the CSS version is nicer. Still, both solutions fail on generic input. > > Sorry, out of clues \startbuffer[demo] <xml> <div class="section level3"> <h3>One</h3> <p>Standard paragraph</p> <blockquote> <p>Quoted text</p> </blockquote> </div> <div class="section level3"> <h3>Two</h3> <blockquote> <p>Direct quote</p> </blockquote> </div> </xml> \stopbuffer \startxmlsetups xml:initialize \xmlsetsetup{#1} {xml|p|blockquote|div} {xml:*} \xmlsetsetup{#1} {/xml/div[contains(@class,'level3')]} {xml:section:level3} \stopxmlsetups \xmlregistersetup{xml:initialize} \startxmlsetups xml:xml \xmlall{#1}{/div} \stopxmlsetups \startxmlsetups xml:p \startpar\xmlflush{#1}\stoppar \stopxmlsetups \startxmlsetups xml:blockquote \startblockquote\xmlflush{#1}\stopblockquote \stopxmlsetups \startxmlsetups xml:section:level3 \xmldoif{#1}{/blockquote} { \xmldoifnot{#1}{/p} { \section{\xmlflush{#1}} } } \stopxmlsetups \starttext \xmlprocessbuffer{main}{demo}{} \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: issue with lpath 2022-08-04 14:07 ` Hans Hagen via ntg-context @ 2022-08-04 15:32 ` Taco Hoekwater via ntg-context 2022-08-04 16:39 ` Pablo Rodriguez via ntg-context 0 siblings, 1 reply; 9+ messages in thread From: Taco Hoekwater via ntg-context @ 2022-08-04 15:32 UTC (permalink / raw) To: Hans Hagen Cc: Taco Hoekwater, mailing list for ConTeXt users, Pablo Rodriguez > On 4 Aug 2022, at 16:07, Hans Hagen <j.hagen@xs4all.nl> wrote: > > On 8/4/2022 12:22 PM, Taco Hoekwater via ntg-context wrote: >>> On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote: >>> >>> BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua? >> I was wondering about that as well, and I really had no clue how to do that. Some >> reading and studying later, I realised that there is a preceding-sibling:: axis. >> That is not documented in xml-mkiv.pdf I think, but it inherited from xpath, and that means this works: >> \xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section} >> “Take all blockquotes, then tests their immediate preceding siblings (index [-1]) that are h3." >> But the CSS version is nicer. Still, both solutions fail on generic input. >> Sorry, out of clues > \startbuffer[demo] > ... That puts the whole <div> content inside the \section, and I don’t think that was the intent. I understood that Pablo only wants the “h3” node. In the original request, the CSS “{h3 + blockquote}” matches a “blockquote” anyplace where it is immediately preceded by a “h3” (and nowhere else). After that, some trickery was needed to try and get back to the actual “h3”. My trick above with preceding-sibling above also gets the “h3” that is immediately followed by a “blockquote”, but it got easily confused if there were multiple “h3” or “blockquote” objects in the input. Best wishes, Taco PS This sort of confusing filtering is why I do most of my xml processing from the lua end, where it is much clearer to me what is what. — Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns) ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: issue with lpath 2022-08-04 15:32 ` Taco Hoekwater via ntg-context @ 2022-08-04 16:39 ` Pablo Rodriguez via ntg-context 2022-08-05 15:28 ` Taco Hoekwater via ntg-context 0 siblings, 1 reply; 9+ messages in thread From: Pablo Rodriguez via ntg-context @ 2022-08-04 16:39 UTC (permalink / raw) To: Taco Hoekwater via ntg-context; +Cc: Pablo Rodriguez On 8/4/22 17:32, Taco Hoekwater via ntg-context wrote: > [...] > PS This sort of confusing filtering is why I do most of my xml > processing from the lua end, where it is much clearer to me what is > what. Many thanks for clarifying the issue, Taco. BTW, according to the last slide from https://meeting.contextgarden.net/2019/talks/02-xmlprocessing/02-xmlprocessing.pdf, you had plans to document how to deal with XML in proper Lua. I wonder whether you are still interested in adding this information to the manual. Many thanks for your help, Pablo ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: issue with lpath 2022-08-04 16:39 ` Pablo Rodriguez via ntg-context @ 2022-08-05 15:28 ` Taco Hoekwater via ntg-context 0 siblings, 0 replies; 9+ messages in thread From: Taco Hoekwater via ntg-context @ 2022-08-05 15:28 UTC (permalink / raw) To: mailing list for ConTeXt users; +Cc: Taco Hoekwater > On 4 Aug 2022, at 18:39, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote: > > On 8/4/22 17:32, Taco Hoekwater via ntg-context wrote: >> [...] >> PS This sort of confusing filtering is why I do most of my xml >> processing from the lua end, where it is much clearer to me what is >> what. > Many thanks for clarifying the issue, Taco. > > BTW, according to the last slide from > https://meeting.contextgarden.net/2019/talks/02-xmlprocessing/02-xmlprocessing.pdf, > you had plans to document how to deal with XML in proper Lua. > > I wonder whether you are still interested in adding this information to > the manual. In theory, yes. In reality, life is too short, and it is on the bottom of an ever rising pile of things to do. :sadface Best wishes, Taco Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns) ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: issue with lpath 2022-08-04 10:22 ` Taco Hoekwater via ntg-context 2022-08-04 14:07 ` Hans Hagen via ntg-context @ 2022-08-04 15:15 ` Pablo Rodriguez via ntg-context 1 sibling, 0 replies; 9+ messages in thread From: Pablo Rodriguez via ntg-context @ 2022-08-04 15:15 UTC (permalink / raw) To: Taco Hoekwater via ntg-context; +Cc: Pablo Rodriguez On 8/4/22 12:22, Taco Hoekwater via ntg-context wrote: >> On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote: >> BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua? > > I was wondering about that as well, and I really had no clue how to > do that. Some reading and studying later, I realised that there is a > preceding-sibling:: axis. > > That is not documented in xml-mkiv.pdf I think, but it inherited > from xpath, and that means this works:> > \xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section} > > “Take all blockquotes, then tests their immediate preceding siblings > (index [-1]) that are h3." Many thanks for your reply, Taco. It isn’t documented, but I have just discovered that it is used inside a function: https://www.pragma-ade.com/general/manuals/xml-mkiv.pdf#search=sibling > But the CSS version is nicer. I agree. But using CSS for LPaths feels like cheating to me. Many thanks for your help again, Pablo ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2022-08-05 15:28 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-08-02 19:14 issue with lpath Pablo Rodriguez via ntg-context 2022-08-03 7:09 ` Taco Hoekwater via ntg-context 2022-08-03 13:54 ` Pablo Rodriguez via ntg-context 2022-08-04 10:22 ` Taco Hoekwater via ntg-context 2022-08-04 14:07 ` Hans Hagen via ntg-context 2022-08-04 15:32 ` Taco Hoekwater via ntg-context 2022-08-04 16:39 ` Pablo Rodriguez via ntg-context 2022-08-05 15:28 ` Taco Hoekwater via ntg-context 2022-08-04 15:15 ` Pablo Rodriguez via ntg-context
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