[NTG-context] Count (and limit) glyphs per line?
Hans Hagen
j.hagen at xs4all.nl
Fri Jun 24 19:58:51 CEST 2022
On 6/24/2022 5:15 AM, Benjamin Buchmuller via ntg-context wrote:
> Dear list,
>
> I've been confronted with the following 'intriguing' formatting requirement for a document:
>
> "
> • Type density: Must be no more than 15 characters per linear inch (including characters and spaces).
> • Line spacing: Must be no more than six lines per vertical inch.
> "
>
> While the line spacing resolves in ConTeXt to
>
> \setupinterlinespace[line=\dimexpr(1in / 6)]
>
> I was wondering if one can limit "type density" as the number of glyphs per inch in TeX too? I thought, it is more convenient to rephrase this request (for a 7 in textwidth) to limit the number of glyphs per line to 112. (Font must be sans or serif, of course ...)
>
> I've tried
>
> \setuplayout[width=112\averagecharwidth]
>
> which, however, results in ~120–130 characters and spaces per line. Pragmatically, I'm narrowing the text width to empirically match the requirement, but I'm nevertheless curious if there is a Lua/TeX solution to this "problem"?
Just assume the worst case and take the narrowest character:
\showframe
\setupbodyfont[modern] % we need to set the font
\normalexpanded {
\setuplayout
[textwidth=\the\dimexpr112\fontcharwd\font`.\relax]
}
\starttext
\input tufte
\stoptext
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