Re: [NTG-context] processing xml with lua
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
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Re: [NTG-context] processing xml with lua
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
-
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___
Re: [NTG-context] processing xml with lua
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
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archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
Re: [NTG-context] processing xml with lua
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]
Fruit Apple
Vegetable Carot
Fruit
Vegetable
\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
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--
-
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
-
___
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Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive : http://foundry.supelec.fr/projects/contextrev/
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Re: [NTG-context] processing xml with lua
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]
Fruit Apple
Vegetable Carot
Fruit
Vegetable
\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
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Re: [NTG-context] processing xml with lua
On Feb 26, 2013, at 1:54 PM, Hans Hagen 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 ___
Re: [NTG-context] processing xml with lua
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]
text 1.1
text 3.1
text 3.5
\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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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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--
-
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/
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