From: Hans Hagen <pragma@wxs.nl>
To: ntg-context@ntg.nl
Subject: Re: Size of the last shipped page by Lua?
Date: Fri, 23 Sep 2016 15:00:39 +0200 [thread overview]
Message-ID: <91e2727f-e58c-2067-9282-8bbb3fb2c668@wxs.nl> (raw)
In-Reply-To: <op.yn8q5rny62epfj@lpr>
On 9/23/2016 1:50 PM, Procházka Lukáš Ing. wrote:
> Hello,
>
> still a problem - consider the following code:
>
> ----
> \ifx\startpapersize\undefined
> \unprotect
> \def\startpapersize{\page\pushmacro\page_paper_restore\setuppapersize}
> \protect
> \fi
>
> \ifx\stoppapersize\undefined
> \unprotect
> \def\stoppapersize{\page\popmacro\page_paper_restore\setuppapersize}
> \protect
> \fi
>
> %
>
> \startluacode
> local tomm = function(v) return v * (210 / 39158276) end
>
> pgsz = function()
> context("w=%.1f, h=%.1f", tomm(tex.dimen.paperwidth),
> tomm(tex.dimen.paperheight))
> end
> \stopluacode
>
> %
>
> \starttext
> A
> \ctxlua{pgsz()}
>
> \startpapersize[A3,landscape]
> B
> \ctxlua{pgsz()}
> \stoppapersize
>
> \startTEXpage[width=200mm,height=100mm]
> C % 3rd page
> \ctxlua{pgsz()}
> \stopTEXpage
the papersize of a TEXpage is known when that page is flushed and when
you ask for it the way you do now tex is still constructing the box
it's all a matter of timing
\starttext
\appendtoks
\ctxlua{
print(
number.topoints(tex.dimen.paperwidth ),
number.topoints(tex.dimen.paperheight)
)
}%
\to \everyshipout
\setuppapersize[A4] test
\startTEXpage test \stopTEXpage
\setuppapersize[A3] test
\stoptext
> \stoptext
> ----
>
> In the case of 3rd page (with text "C"), page size "w=210.0, h=297.0" is
> printed instead of "w=200.0, h=100.0".
>
> So how to access values 200 and 100 mm for the page produced by
> \startTEXpage[width=...,height=...]?
>
> Best regards,
>
> Lukas
>
>
> On Thu, 08 Sep 2016 22:12:49 +0200, Hans Hagen <pragma@wxs.nl> wrote:
>
>> On 9/8/2016 9:47 PM, josephcanedo@gmail.com wrote:
>>> If by messing it’s meant modifying their values, I agree that’s a bad
>>> idea 😊, the requirement is likely to read the value only (at least this
>>> is my usage of these in shipouts « after » callback).
>>>
>>> If these are not reliable, what’s the reliable way to get the page width
>>> and height ?
>>
>> \starttext
>>
>> \ctxlua{context(number.topoints(tex.dimen.paperwidth))}
>>
>> \ctxlua{context(number.topoints(tex.dimen.paperheight))}
>>
>> \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://tex.aanhet.net
>> archive : http://foundry.supelec.fr/projects/contextrev/
>> wiki : http://contextgarden.net
>> ___________________________________________________________________________________
>>
>
>
>
>
> ___________________________________________________________________________________
> 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 | 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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
prev parent reply other threads:[~2016-09-23 13:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-07 15:12 Procházka Lukáš Ing.
2016-09-07 19:39 ` josephcanedo
2016-09-07 22:21 ` Hans Hagen
2016-09-08 19:47 ` josephcanedo
2016-09-08 20:12 ` Hans Hagen
2016-09-12 6:13 ` Procházka Lukáš Ing.
2016-09-23 11:50 ` Procházka Lukáš Ing.
2016-09-23 13:00 ` Hans Hagen [this message]
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