* processing xml with lua
@ 2013-02-26 12:23 Schmitz Thomas A.
2013-02-26 12:54 ` Hans Hagen
0 siblings, 1 reply; 8+ messages in thread
From: Schmitz Thomas A. @ 2013-02-26 12:23 UTC (permalink / raw)
To: mailing ConTeXt users list for
Hi all,
one of my favorite topics… Here is a minimal example which shows something that I don't understand: when I process the subsection with the lua code, I want to get the value of the current section's "label" attribute in xml.attribute(r, "../../section", "label", "X"). So i was expecting that lua would go up (../../) and fetch the current section's label. But if you run the example, you see that it actually always gets the first section's label (value is always 1). How can I get the current section's label with a lua function?
THanks and all best
Thomas
\startbuffer[test]
<chapter>
<section label="1">
<subsection label="1">
<content>
text 1.1
</content>
</subsection>
</section>
<section label="3">
<subsection label="1">
<content>
text 3.1
</content>
</subsection>
<subsection label="5">
<content>
text 3.5
</content>
</subsection>
</section>
</chapter>
\stopbuffer
\startxmlsetups xml:testsetups
\xmlsetsetup{\xmldocument}{chapter|section|subsection|content}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:testsetups}
\startxmlsetups xml:chapter
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\xmlflush{#1} \par
\stopxmlsetups
\startxmlsetups xml:subsection
\xmlfunction{#1}{test}
\stopxmlsetups
\startluacode
outfile = io.open('temp.tmp', 'w')
function xml.functions.test(r)
content = xml.text(r, "content")
section = xml.attribute(r, "../../section", "label", "X")
context("This ") context(content) context(" is in section ") context(section)
end
\stopluacode
\starttext
\xmlprocessbuffer{main}{test}{}
\enabletrackers[context.trace]
\xmlshow{main}
\stoptext
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: processing xml with lua
2013-02-26 12:23 processing xml with lua Schmitz Thomas A.
@ 2013-02-26 12:54 ` Hans Hagen
2013-02-26 13:32 ` Schmitz Thomas A.
0 siblings, 1 reply; 8+ messages in thread
From: Hans Hagen @ 2013-02-26 12:54 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Schmitz Thomas A.
On 2/26/2013 1:23 PM, Schmitz Thomas A. wrote:
> Hi all,
>
> one of my favorite topics… Here is a minimal example which shows something that I don't understand: when I process the subsection with the lua code, I want to get the value of the current section's "label" attribute in xml.attribute(r, "../../section", "label", "X"). So i was expecting that lua would go up (../../) and fetch the current section's label. But if you run the example, you see that it actually always gets the first section's label (value is always 1). How can I get the current section's label with a lua function?
you go up to the parent of sections which to far up, try:
section = xml.attribute(r, "..", "label", "X")
or
section = xml.filter(r, "../attribute(label)")
> THanks and all best
>
> Thomas
>
> \startbuffer[test]
> <chapter>
> <section label="1">
> <subsection label="1">
> <content>
> text 1.1
> </content>
> </subsection>
> </section>
> <section label="3">
> <subsection label="1">
> <content>
> text 3.1
> </content>
> </subsection>
> <subsection label="5">
> <content>
> text 3.5
> </content>
> </subsection>
> </section>
> </chapter>
> \stopbuffer
>
> \startxmlsetups xml:testsetups
> \xmlsetsetup{\xmldocument}{chapter|section|subsection|content}{xml:*}
> \stopxmlsetups
>
> \xmlregistersetup{xml:testsetups}
>
> \startxmlsetups xml:chapter
> \xmlflush{#1}
> \stopxmlsetups
>
> \startxmlsetups xml:section
> \xmlflush{#1} \par
> \stopxmlsetups
>
> \startxmlsetups xml:subsection
> \xmlfunction{#1}{test}
> \stopxmlsetups
>
> \startluacode
> outfile = io.open('temp.tmp', 'w')
> function xml.functions.test(r)
> content = xml.text(r, "content")
> section = xml.attribute(r, "../../section", "label", "X")
> context("This ") context(content) context(" is in section ") context(section)
> end
> \stopluacode
>
> \starttext
> \xmlprocessbuffer{main}{test}{}
>
> \enabletrackers[context.trace]
>
> \xmlshow{main}
> \stoptext
>
> ___________________________________________________________________________________
> 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://tex.aanhet.net
> archive : http://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
>
--
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| 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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: processing xml with lua
2013-02-26 12:54 ` Hans Hagen
@ 2013-02-26 13:32 ` Schmitz Thomas A.
2013-03-05 8:47 ` Thomas A. Schmitz
0 siblings, 1 reply; 8+ messages in thread
From: Schmitz Thomas A. @ 2013-02-26 13:32 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Feb 26, 2013, at 1:54 PM, Hans Hagen <pragma@wxs.nl> wrote:
> you go up to the parent of sections which to far up, try:
>
> section = xml.attribute(r, "..", "label", "X")
>
> or
>
> section = xml.filter(r, "../attribute(label)")
>
>
Mojca, Hans,
thanks, that is exactly right! I wasn't too sure about ../../section, but now it makes sense. I have to study xpath a bit more, I guess.
All best
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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: processing xml with lua
2013-02-26 13:32 ` Schmitz Thomas A.
@ 2013-03-05 8:47 ` Thomas A. Schmitz
2013-03-05 8:58 ` Hans Hagen
0 siblings, 1 reply; 8+ messages in thread
From: Thomas A. Schmitz @ 2013-03-05 8:47 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi,
may I ask another question about my new favorite topic? No? Anyway: here
comes. While processing xml, I would like to store the content of a node
in a lua table and retrieve it later. The example is silly, but
demonstrates my problem. Is there a way to have ConTeXt process and
typeset the value in lines 3 and 4? As you can see, it typesets the raw
xml instead of processing it. (I suspect I'm still a bit lost regarding
the difference between xml... and lxml... functions, but I couldn't hit
the right combination here).
Thanks, and all best
Thomas
\startbuffer[test]
<a>
<b><c>Fruit</c> <d><e>Apple</e></d></b>
<b><c>Vegetable</c> <d><q>Carot</q></d></b>
<b><c>Fruit</c></b>
<b><c>Vegetable</c></b>
</a>
\stopbuffer
\startxmlsetups xml:testsetups
\xmlsetsetup{\xmldocument}{a|b|c|d}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:testsetups}
\startxmlsetups xml:a
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:b
\xmlfunction{#1}{lookup} \par
\stopxmlsetups
\startxmlsetups xml:e
{\bgroup\em \xmlflush{#1}\egroup}
\stopxmlsetups
\startxmlsetups xml:q
\quotation{\xmlflush{#1}}
\stopxmlsetups
\startluacode
lookuptable = { }
function xml.functions.lookup(t)
mytype = xml.text(t, "c")
myvalue = xml.text(t, "d")
if not lookuptable[mytype] then
context("New Type: ") context(mytype) context("; its value is: ")
lxml.text(t, "d")
lookuptable[mytype] = mytype .. " = " .. myvalue
else
context("This Type is already known: ") context(lookuptable[mytype])
end
end
\stopluacode
\starttext
\xmlprocessbuffer{main}{test}{}
\stoptext
___________________________________________________________________________________
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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: processing xml with lua
2013-03-05 8:47 ` Thomas A. Schmitz
@ 2013-03-05 8:58 ` Hans Hagen
2013-03-05 9:16 ` Thomas A. Schmitz
0 siblings, 1 reply; 8+ messages in thread
From: Hans Hagen @ 2013-03-05 8:58 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Thomas A. Schmitz
On 3/5/2013 9:47 AM, Thomas A. Schmitz wrote:
> Hi,
>
> may I ask another question about my new favorite topic? No? Anyway: here
> comes. While processing xml, I would like to store the content of a node
> in a lua table and retrieve it later. The example is silly, but
> demonstrates my problem. Is there a way to have ConTeXt process and
> typeset the value in lines 3 and 4? As you can see, it typesets the raw
> xml instead of processing it. (I suspect I'm still a bit lost regarding
> the difference between xml... and lxml... functions, but I couldn't hit
> the right combination here).
lookuptable[mytype] = mytype .. " = " .. myvalue
inspect(lookuptable)
the .. triggers a tostring on myvalue which in turn serializes the xml
lookuptable[mytype] = { mytype = myvalue }
would keep myvalue as xml node
> Thanks, and all best
>
> Thomas
>
> \startbuffer[test]
> <a>
> <b><c>Fruit</c> <d><e>Apple</e></d></b>
> <b><c>Vegetable</c> <d><q>Carot</q></d></b>
> <b><c>Fruit</c></b>
> <b><c>Vegetable</c></b>
> </a>
> \stopbuffer
>
> \startxmlsetups xml:testsetups
> \xmlsetsetup{\xmldocument}{a|b|c|d}{xml:*}
> \stopxmlsetups
>
> \xmlregistersetup{xml:testsetups}
>
> \startxmlsetups xml:a
> \xmlflush{#1}
> \stopxmlsetups
>
> \startxmlsetups xml:b
> \xmlfunction{#1}{lookup} \par
> \stopxmlsetups
>
> \startxmlsetups xml:e
> {\bgroup\em \xmlflush{#1}\egroup}
> \stopxmlsetups
>
> \startxmlsetups xml:q
> \quotation{\xmlflush{#1}}
> \stopxmlsetups
>
> \startluacode
> lookuptable = { }
> function xml.functions.lookup(t)
> mytype = xml.text(t, "c")
> myvalue = xml.text(t, "d")
> if not lookuptable[mytype] then
> context("New Type: ") context(mytype) context("; its value is: ")
> lxml.text(t, "d")
> lookuptable[mytype] = mytype .. " = " .. myvalue
> else
> context("This Type is already known: ") context(lookuptable[mytype])
> end
> end
> \stopluacode
>
> \starttext
> \xmlprocessbuffer{main}{test}{}
>
> \stoptext
> ___________________________________________________________________________________
>
> 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://tex.aanhet.net
> archive : http://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
>
--
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| 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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: processing xml with lua
2013-03-05 8:58 ` Hans Hagen
@ 2013-03-05 9:16 ` Thomas A. Schmitz
2013-03-05 10:11 ` Hans Hagen
0 siblings, 1 reply; 8+ messages in thread
From: Thomas A. Schmitz @ 2013-03-05 9:16 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
On 03/05/2013 09:58 AM, Hans Hagen wrote:
> lookuptable[mytype] = mytype .. " = " .. myvalue
> inspect(lookuptable)
>
> the .. triggers a tostring on myvalue which in turn serializes the xml
>
> lookuptable[mytype] = { mytype = myvalue }
>
> would keep myvalue as xml node
Hans, thanks a lot, the explanation makes sense, but your suggestion is
not yet clear enough for me: how would I then process the node?
context(lookuptable[mytype]["mytype"])
gives again the serialized xml.
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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: processing xml with lua
2013-03-05 9:16 ` Thomas A. Schmitz
@ 2013-03-05 10:11 ` Hans Hagen
2013-03-05 10:27 ` Thomas A. Schmitz
0 siblings, 1 reply; 8+ messages in thread
From: Hans Hagen @ 2013-03-05 10:11 UTC (permalink / raw)
To: Thomas A. Schmitz; +Cc: mailing list for ConTeXt users
On 3/5/2013 10:16 AM, Thomas A. Schmitz wrote:
> On 03/05/2013 09:58 AM, Hans Hagen wrote:
>> lookuptable[mytype] = mytype .. " = " .. myvalue
>> inspect(lookuptable)
>>
>> the .. triggers a tostring on myvalue which in turn serializes the xml
>>
>> lookuptable[mytype] = { mytype = myvalue }
>>
>> would keep myvalue as xml node
>
> Hans, thanks a lot, the explanation makes sense, but your suggestion is
> not yet clear enough for me: how would I then process the node?
>
> context(lookuptable[mytype]["mytype"])
>
> gives again the serialized xml.
\startluacode
local lookuptable = { }
function xml.functions.lookup(t)
local mytype = xml.text(t, "c")
local myvalue = lookuptable[mytype]
if not myvalue then
myvalue = xml.first(t, "d")
lookuptable[mytype] = myvalue
context("registered: ")
else
context("reused: ")
end
-- each found node gets an id
lxml.flush(lxml.id(myvalue))
context(" or ")
-- in tex mode a to-tex serializer is the default
xml.cprint(myvalue)
end
\stopluacode
One place to look for tricks is in x-mathml.mkiv / lua (I know, I should
finish that manual).
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| 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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: processing xml with lua
2013-03-05 10:11 ` Hans Hagen
@ 2013-03-05 10:27 ` Thomas A. Schmitz
0 siblings, 0 replies; 8+ messages in thread
From: Thomas A. Schmitz @ 2013-03-05 10:27 UTC (permalink / raw)
To: mailing list for ConTeXt users, Hans Hagen
On 03/05/2013 11:11 AM, Hans Hagen wrote:
> \startluacode
> local lookuptable = { }
> function xml.functions.lookup(t)
> local mytype = xml.text(t, "c")
> local myvalue = lookuptable[mytype]
> if not myvalue then
> myvalue = xml.first(t, "d")
> lookuptable[mytype] = myvalue
> context("registered: ")
> else
> context("reused: ")
> end
> -- each found node gets an id
> lxml.flush(lxml.id(myvalue))
> context(" or ")
> -- in tex mode a to-tex serializer is the default
> xml.cprint(myvalue)
> end
> \stopluacode
>
> One place to look for tricks is in x-mathml.mkiv / lua (I know, I should
> finish that manual).
>
> Hans
Beautiful! Thanks a lot, that's just what I needed. And yes, in the
medium-to-long run, finishing the manual will save you from being
pestered with my questions... :-)
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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread
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2013-02-26 12:23 processing xml with lua Schmitz Thomas A.
2013-02-26 12:54 ` Hans Hagen
2013-02-26 13:32 ` Schmitz Thomas A.
2013-03-05 8:47 ` Thomas A. Schmitz
2013-03-05 8:58 ` Hans Hagen
2013-03-05 9:16 ` Thomas A. Schmitz
2013-03-05 10:11 ` Hans Hagen
2013-03-05 10:27 ` Thomas A. Schmitz
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