From: Hans Hagen <j.hagen@xs4all.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Getting width of text to be typeset
Date: Sat, 23 May 2020 00:03:50 +0200 [thread overview]
Message-ID: <e7ebbe94-0dbf-5113-8dc2-9af6cc6a8d82@xs4all.nl> (raw)
In-Reply-To: <1217e4fe7a813a0e714d342b9efec0c4@vivaldi.net>
On 5/22/2020 11:22 AM, context@vivaldi.net wrote:
> Hello,
>
> is it possible to get somehow the width of the "material" (box?) of the
> current line which is "ready" to be typeset?
>
> See the case:
>
> ----
> \starttext
>
> some text
>
> pqrs % Here I need to get width (or content) of the text from the
> begin of the current line,
> % i.e. width of the text "pqrs".
> % (Depending of the width I will decide what to do later.)
>
> \stoptext
> ----
>
> I am too laical to know how to "inject" TeX workflow or whether to
> access LuaTeX internals (nodes?) to get the desired information.
>
> - Is it possible somehow?
Too easy ...
\startluacode
function document.whatever()
context(nodes.hpack(tex.getnest().head.next).width)
end
\stopluacode
\unexpanded\def\widthuptohere{\dimexpr\ctxlua{document.whatever()}sp\relax}
\starttext
\dorecurse {10} {
snippet #1\scratchdimen\widthuptohere\ has \the\scratchdimen\
width\par
}
\stoptext
but still you have to wikify it ... maybe i'll make it a low level
helper (but than you also need to wikify that because i have no clue
where to explain it)
Hans
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next prev parent reply other threads:[~2020-05-22 22:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 9:22 context
2020-05-22 22:03 ` Hans Hagen [this message]
2020-05-22 22:18 ` Hans Hagen
2020-05-22 23:49 ` Rik Kabel
2020-05-23 11:04 ` Gerben Wierda
2020-05-23 13:52 ` Rik Kabel
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