[NTG-context] teaser

[Wolfgang Schuster]

Hans Hagen schrieb am 06.08.2020 um 19:26:
> Hi,
> 
> I uploaded a new lmtx version ... it has a new mechanism for 
> manipulating boxes:
> 
> http://www.pragma-ade.com/general/magazines/mag-1105-mkiv.pdf
> 
> (also in distribution)
> 
> Of course experimental but I bet that some can think of usage.

The \copyboxline command doesn't stop at the end of the requested line.

BTW: Is it possible to have unbox command to get the width of the 
content in the lines without the spaces at the begin end. This is useful 
to get the width of first/last line in a box.

%% begin example
\starttext

\setbox0\vbox
   {\hsize=4cm
    one\par
    two\par
    three\par
    four}

\setbox2\ruledhbox{\copyboxline 0 2}
\setbox4\ruledhbox{\boxline 0 3}
%\setbox6           \boxline 0 5 % error

[2] [\box2] \par
[3] [\box4] \par
[5] [\box6] \par

\stoptext
%% end example

Wolfgang