On 2/28/24 12:24, Pablo Rodriguez via ntg-context wrote:
> [...]
> This is why beforequadruple would make sense. I guess some Lua magic
> could do that, computing x to the follwing page that "x % 4 = 3" (and
> then \page[x]).
>
> I will try to find a trick for that, but not now.
Replying to myself, this is a command to compute next numbers before and
after quadruples (with application to \realpageno):
\starttext
\def\beforequadruplenumber#1%
{\ifnum\modulonumber{4}{#1} = 1
\the\numexpr #1 + 2
\orelse\ifnum\modulonumber{4}{#1} = 2
\the\numexpr #1 + 1
\orelse\ifnum\modulonumber{4}{#1} = 3
\the\numexpr #1 + 4
\else
\the\numexpr #1 + 3
\fi}
\def\afterquadruplenumber#1%
{\ifnum\modulonumber{4}{#1} = 1
\the\numexpr #1 + 4
\orelse\ifnum\modulonumber{4}{#1} = 2
\the\numexpr #1 + 3
\orelse\ifnum\modulonumber{4}{#1} = 3
\the\numexpr #1 + 2
\else
\the\numexpr #1 +1
\fi}
\dorecurse{25}{\recurselevel: \beforequadruplenumber{\recurselevel}\\}
\dorecurse{25}{\recurselevel: \afterquadruplenumber{\recurselevel}\\}
%\page[123]
%\null
\page[\beforequadruplenumber{\realpageno}]
before quadruple
\page[\afterquadruplenumber{\realpageno}]
afterquadruple
\stoptext
Michael, if this fits your needs, please add it to the wiki.
I hope it helps,
Pablo
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl /
https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive : https://github.com/contextgarden/context
wiki : https://wiki.contextgarden.net
___________________________________________________________________________________
