* luatex examples - Traversing TeX nodes
@ 2009-06-01 9:48 Piotr Kopszak
2009-06-01 20:59 ` Hans Hagen
0 siblings, 1 reply; 3+ messages in thread
From: Piotr Kopszak @ 2009-06-01 9:48 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hello,
I am trying to compile luatex examples from http://luatex.bluwiki.com
. How could I make it work with ConTeXt? The following fails.
-----------------------------------------------------------------------------------------------------------------------------------
\directlua0{
local glyph = node.id('glyph')
local hlist = node.id('hlist')
local vlist = node.id('vlist')
function gothru(h,prof)
for t in node.traverse(h) do
texio.write_nl(string.rep("...",prof) .. 'NODE type=' ..
node.type(t.id) .. ' subtype=' .. t.subtype )
if t.id == hlist or t.id == vlist then
texio.write(' w=' .. t.width .. ' h=' .. t.height .. ' d=' ..
t.depth .. ' s=' .. t.shift )
gothru(t.list,prof+1)
end
if t.id == glyph then
texio.write(' font=' .. t.font .. ' char=' .. t.char .. '
width=' font.fonts[t.font].characters[t.char]['width'])
end
end
end
callback.register('pre_linebreak_filter',
function(h)
gothru(h,0)
return true
end
)
}
\starttext
bla bla bla bla
\stoptext
-------------------------------------------------------------------------------------------------------
best
Piotr
--
http://okle.pl
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: luatex examples - Traversing TeX nodes
2009-06-01 9:48 luatex examples - Traversing TeX nodes Piotr Kopszak
@ 2009-06-01 20:59 ` Hans Hagen
2009-06-01 21:52 ` Piotr Kopszak
0 siblings, 1 reply; 3+ messages in thread
From: Hans Hagen @ 2009-06-01 20:59 UTC (permalink / raw)
To: mailing list for ConTeXt users
Piotr Kopszak wrote:
> Hello,
>
> I am trying to compile luatex examples from http://luatex.bluwiki.com
i have no time to look into it now but be aware of the fact that if you
set a callback like this you're likely to overload one that context
itself sets and that can result in problems elsewhere
there are user hooks but i need to describe them (as one should be very
careful in doing thinsg that interfere)
a safe way to play with node is is
\setbox0=\vbox{....}
and the look at tex.box[0].list
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 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 : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: luatex examples - Traversing TeX nodes
2009-06-01 20:59 ` Hans Hagen
@ 2009-06-01 21:52 ` Piotr Kopszak
0 siblings, 0 replies; 3+ messages in thread
From: Piotr Kopszak @ 2009-06-01 21:52 UTC (permalink / raw)
To: mailing list for ConTeXt users
Great thanks for your hint.
Ever onward!
Piotr
2009/6/1 Hans Hagen <pragma@wxs.nl>:
> Piotr Kopszak wrote:
>>
>> Hello,
>>
>> I am trying to compile luatex examples from http://luatex.bluwiki.com
>
> i have no time to look into it now but be aware of the fact that if you set
> a callback like this you're likely to overload one that context itself sets
> and that can result in problems elsewhere
>
> there are user hooks but i need to describe them (as one should be very
> careful in doing thinsg that interfere)
>
> a safe way to play with node is is
>
> \setbox0=\vbox{....}
>
> and the look at tex.box[0].list
>
>
>
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | fax: 038 477 53 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 : https://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
>
--
http://okle.pl
___________________________________________________________________________________
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 : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
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2009-06-01 9:48 luatex examples - Traversing TeX nodes Piotr Kopszak
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2009-06-01 21:52 ` Piotr Kopszak
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