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From: "Procházka Lukáš Ing." <LPr@pontex.cz>
To: "mailing list for ConTeXt users" <ntg-context@ntg.nl>
Subject: Re: Size of the last shipped page by Lua?
Date: Fri, 23 Sep 2016 13:50:05 +0200	[thread overview]
Message-ID: <op.yn8q5rny62epfj@lpr> (raw)
In-Reply-To: <1f345b61-33aa-f146-fb59-3727e1cdc16b@wxs.nl>

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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
\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
> ___________________________________________________________________________________


-- 
Ing. Lukáš Procházka | mailto:LPr@pontex.cz
Pontex s. r. o.      | mailto:pontex@pontex.cz | http://www.pontex.cz | IDDS:nrpt3sn
Bezová 1658
147 14 Praha 4

Tel: +420 241 096 751 (+420 720 951 172)
Fax: +420 244 461 038

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\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
    \ctxlua{pgsz()}
  \stopTEXpage
\stoptext

[-- Attachment #3: PgSz.pdf --]
[-- Type: application/pdf, Size: 6383 bytes --]

[-- Attachment #4: Type: text/plain, Size: 485 bytes --]

___________________________________________________________________________________
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
___________________________________________________________________________________

  parent reply	other threads:[~2016-09-23 11:50 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. [this message]
2016-09-23 13:00           ` Hans Hagen

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