Re: [NTG-context] xml in lua: how to say "ancestor"?
On 3/3/2017 5:47 PM, Thomas A. Schmitz wrote:
On 25.02.2017 21:49, Hans Hagen wrote:
xml.attribute(e,"..[tag()='section' or tag()='chapter']","title")
with an optional default
(there is also p = xml.parent(e) and then you can access p.at.title ..
so there are several ways(
Hans
I am sorry it took me so long to play with this... But it still doesn't
do what I need. My problem is still: from a given element, I need to
grab the content of an attribute that may be two or three or four levels
up in the xml tree. The code below (adapted from Hans) still only works
for a parent, but I need access to an "ancestor."
chaptertitle = xml.attribute(e, "..[tag()='chapter']", "title")
if not chaptertitle or chaptertitle == "" then
chaptertitle = xml.attribute(e, "../..[tag()='chapter']", "title")
end
Thomas
\starttext
\startbuffer[test]
Subsection Text
Subsection Text
\stopbuffer
\startluacode
function xml.functions.xml_subsection(e)
chaptertitle = xml.attribute(e, "..[tag()='chapter']", "title")
context("Title of chapter is: ")
context(chaptertitle)
context.par()
lxml.flush(e)
context.blank( { "2*line" })
end
\stopluacode
\startxmlsetups xml:test:setups
\xmlsetsetup{\xmldocument}{*}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:test:setups}
\startxmlsetups xml:document
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:chapter
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:subsection
\xmlfunction{#1}{xml_subsection}
\stopxmlsetups
\xmlprocessbuffer{main}{test}{}
\stoptext
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Hans Hagen | PRAGMA ADE
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Re: [NTG-context] xml in lua: how to say "ancestor"?
On 25.02.2017 21:49, Hans Hagen wrote:
xml.attribute(e,"..[tag()='section' or tag()='chapter']","title")
with an optional default
(there is also p = xml.parent(e) and then you can access p.at.title ..
so there are several ways(
Hans
I am sorry it took me so long to play with this... But it still doesn't
do what I need. My problem is still: from a given element, I need to
grab the content of an attribute that may be two or three or four levels
up in the xml tree. The code below (adapted from Hans) still only works
for a parent, but I need access to an "ancestor."
Thomas
\starttext
\startbuffer[test]
Subsection Text
Subsection Text
\stopbuffer
\startluacode
function xml.functions.xml_subsection(e)
chaptertitle = xml.attribute(e, "..[tag()='chapter']", "title")
context("Title of chapter is: ")
context(chaptertitle)
context.par()
lxml.flush(e)
context.blank( { "2*line" })
end
\stopluacode
\startxmlsetups xml:test:setups
\xmlsetsetup{\xmldocument}{*}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:test:setups}
\startxmlsetups xml:document
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:chapter
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:subsection
\xmlfunction{#1}{xml_subsection}
\stopxmlsetups
\xmlprocessbuffer{main}{test}{}
\stoptext
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Re: [NTG-context] xml in lua: how to say "ancestor"?
On 02/25/2017 09:49 PM, Hans Hagen wrote: xml.attribute(e,"..[tag()='section' or tag()='chapter']","title") with an optional default (there is also p = xml.parent(e) and then you can access p.at.title .. so there are several ways( Excellent, I can work with that! Thanks a lot Thomas ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] xml in lua: how to say "ancestor"?
On 2/25/2017 9:35 PM, Thomas A. Schmitz wrote:
On 02/25/2017 09:10 PM, Hans Hagen wrote:
then you can just use
xml.attribute (or lxml.attribute)
Yes, exactly: how does something like
\xmlattribute{#1}{..[tag()='section' or tag()='chapter']}{title}
translate into lua? such as
xml.attribute(e, "../../chapter", "title", "")?
xml.attribute(e,"..[tag()='section' or tag()='chapter']","title")
with an optional default
(there is also p = xml.parent(e) and then you can access p.at.title ..
so there are several ways(
Hans
Thomas
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--
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
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Re: [NTG-context] xml in lua: how to say "ancestor"?
On 02/25/2017 09:10 PM, Hans Hagen wrote:
then you can just use
xml.attribute (or lxml.attribute)
Yes, exactly: how does something like
\xmlattribute{#1}{..[tag()='section' or tag()='chapter']}{title}
translate into lua? such as
xml.attribute(e, "../../chapter", "title", "")?
Thomas
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Re: [NTG-context] xml in lua: how to say "ancestor"?
On 2/25/2017 8:24 PM, Thomas A. Schmitz wrote:
Hans,
thanks for your efforts and your help - but I need a lua solution
because I have to process my document in lua tables.
then you can just use
xml.attribute (or lxml.attribute)
Thanks
Thomas
On 02/25/2017 07:30 PM, Hans Hagen wrote:
\startbuffer[test]
Text
Text
\stopbuffer
\startxmlsetups xml:test:setups
\xmlsetsetup{\xmldocument}{*}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:test:setups}
\startxmlsetups xml:document
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:chapter
\blank[2*big] CHAPTER: \xmlattribute{#1}{.}{title}\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\blank SECTION: \xmlattribute{#1}{.}{title} \blank\relax
(previous:\xmlattribute{#1}{..[tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:subsection
\blank SUBSECTION: \xmlattribute{#1}{.}{title} \blank\relax
\blank
(previous:\xmlattribute{#1}{..[tag()='section' or
tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\xmlprocessbuffer{main}{test}{}
\stoptext
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--
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
___
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Re: [NTG-context] xml in lua: how to say "ancestor"?
Hans,
thanks for your efforts and your help - but I need a lua solution
because I have to process my document in lua tables.
Thanks
Thomas
On 02/25/2017 07:30 PM, Hans Hagen wrote:
\startbuffer[test]
Text
Text
\stopbuffer
\startxmlsetups xml:test:setups
\xmlsetsetup{\xmldocument}{*}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:test:setups}
\startxmlsetups xml:document
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:chapter
\blank[2*big] CHAPTER: \xmlattribute{#1}{.}{title}\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\blank SECTION: \xmlattribute{#1}{.}{title} \blank\relax
(previous:\xmlattribute{#1}{..[tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:subsection
\blank SUBSECTION: \xmlattribute{#1}{.}{title} \blank\relax
\blank
(previous:\xmlattribute{#1}{..[tag()='section' or
tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\xmlprocessbuffer{main}{test}{}
\stoptext
___
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Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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Re: [NTG-context] xml in lua: how to say "ancestor"?
On 2/25/2017 5:18 PM, Thomas A. Schmitz wrote:
Hi all,
no real example, just snippets, sorry: I need to process xml documents
in lua (because I want to collect information in tables). The structure
is a bit irregular:
Text
Text
So chapters may or may not have sections. If, on the level of my
subscetions, I want to extract the information of the chapter title, in
a ConTeXt environment, I could say
\xmlattribute{#1}{ancestor::chapter}{title}. How could I do the same in
lua? I have something like
xml.attribute(e, "../../chapter", "title", "")
but that only works for the first case, not the second one. I tried to
understand the lpegs in lxml-lpt.lua, but didn't succeed.
Thanks, and best wishes
\starttext
\startbuffer[test]
Text
Text
\stopbuffer
\startxmlsetups xml:test:setups
\xmlsetsetup{\xmldocument}{*}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:test:setups}
\startxmlsetups xml:document
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:chapter
\blank[2*big] CHAPTER: \xmlattribute{#1}{.}{title}\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\blank SECTION: \xmlattribute{#1}{.}{title} \blank\relax
(previous:\xmlattribute{#1}{..[tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:subsection
\blank SUBSECTION: \xmlattribute{#1}{.}{title} \blank\relax
\blank
(previous:\xmlattribute{#1}{..[tag()='section' or
tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\xmlprocessbuffer{main}{test}{}
\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 / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___
[NTG-context] xml in lua: how to say "ancestor"?
Hi all,
no real example, just snippets, sorry: I need to process xml documents
in lua (because I want to collect information in tables). The structure
is a bit irregular:
Text
Text
So chapters may or may not have sections. If, on the level of my
subscetions, I want to extract the information of the chapter title, in
a ConTeXt environment, I could say
\xmlattribute{#1}{ancestor::chapter}{title}. How could I do the same in
lua? I have something like
xml.attribute(e, "../../chapter", "title", "")
but that only works for the first case, not the second one. I tried to
understand the lpegs in lxml-lpt.lua, but didn't succeed.
Thanks, and best wishes
Thomas
___
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
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