From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: TeX expansion within lua
Date: Wed, 05 Sep 2012 11:18:02 +0200 [thread overview]
Message-ID: <504718CA.2090209@wxs.nl> (raw)
In-Reply-To: <20120904194029.20b9abdf@homerow>
On 4-9-2012 19:40, Marco Patzer wrote:
> On 2012-09-04 Martin Schröder <martin@oneiros.de> wrote:
>
> Hi Martin,
>
>> http://tracker.luatex.org/view.php?id=682
>
> It seems that I just hit a very hard to solve issue which needs
> not yet available support from the luatex side.
>
> Patricks solution seems not very practical and error prone, so I
> settled with this ugly but still readable workaround:
>
> \def\cmd
> {\newdimen\mydimen
> \mydimen=50pt}
>
> \starttexdefinition action
> \cmd
> \startluacode
> if tex.dimen.mydimen < tex.dimen.textwidth then %
> context("is smaller")
> else %
> context("is not smaller")
> end %
> \stopluacode
> \stoptexdefinition
>
> \action
you probably over code things ... instead of storing you can pass the
valus directly
\def\largerthantextwidth#1%
{\cldcontext
{if \number\dimexpr#1<tex.dimen.textwidth then
"is smaller"
else
"is equal or larger"
fi}}
you don't need to store in a dimen, as effectively these are just numbers:
local temp = \number\dimexpr#1 ;
...
if temp<tex.dimen.textwidth then
context("is smaller")
else
context("is equal or larger")
fi
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next prev parent reply other threads:[~2012-09-05 9:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 15:12 Marco Patzer
2012-09-04 15:28 ` Aditya Mahajan
2012-09-04 16:54 ` Marco Patzer
2012-09-04 17:06 ` Martin Schröder
2012-09-04 17:40 ` Marco Patzer
2012-09-04 17:53 ` Wolfgang Schuster
2012-09-04 18:11 ` Marco Patzer
2012-09-04 18:25 ` Wolfgang Schuster
2012-09-04 18:58 ` Marco Patzer
2012-09-05 9:18 ` Hans Hagen [this message]
2012-09-05 9:42 ` Marco Patzer
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