Re: [NTG-context] Getting dimensions in Lua

Woah, nice! I was trying to pass some values to MetaPost via Lua (usual laziness to learn macro languages). Thank you a lot, especially because I was looking at the wrong functions in the token namespace. I'll upload a more specific example soon while I polish some code. Very thankful. Jairo :) El lun, 18 de ene. de 2021 a la(s) 05:02, Taco Hoekwater (taco@bittext.nl) escribió:

...

On 18 Jan 2021, at 10:45, Hans Hagen wrote:

On 1/18/2021 1:58 AM, Jairo A. del Rio wrote:

...

Hi, list. I want to get some dimensions in Lua. See, for instance \starttext \the\dimexpr\availablehsize\relax %say, 426pt \stoptext Is there an equivalent in ConTeXt for Lua, i.e. without passing values from TeX or, at least, using only Lua commands? Thank you in advance. tex being tex, there is always a way ...

There is also this option:

% function returns scaled points \startluacode function availablehsize() local l = tex.dimen.hsize - tex.skip.leftskip.width - tex.skip.rightskip.width if tex.count.hangafter<0 then local h = tex.dimen.hangindent if h>0 then l = l - h else l = l + h end end return l end \stopluacode

But I suspect that there are multiple cases where this does not work (like when used in horizontal mode, for example if the par setting changes before the \par is seen, or when there is data in the local par node)

Best wishes, Taco

— Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns)