Given a chunk of text,
8<---
\setuppapersize[A1]
\setupheader [state=empty, no]
\usetypescript[ibmplex]
\setupbodyfont[ibmplex, mono, 10pt]
\setupinterlinespace[12=pt]
\hyphenation[off]
\definelayer[behindtext]
\definelayer[beforetext]
\setupbackgrounds[text][background={behindtext,foreground,beforetext}]
\definecolor[achter][r=.95,g=.95,b=.95]
\startTEXpage[offset=10mm]
\setlayer[behindtext][x=63mm,y=0mm]{\framed[width=2mm,height=\textheight,background=color,backgroundcolor=achter,frame=off]{}}
\setlayer[behindtext][x=139mm,y=0mm]{\framed[width=2mm,height=\textheight,background=color,backgroundcolor=achter,frame=off]{}}
\startlines
~~~~~~~~~~~~~~~~~~~~~~~~~.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~.~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~haken~&~ogen~~~~~~~~~~~~~~~~~~~~~~~~~~~~taxatie~&~advies~~~~~~~~
~~~~~~~~~~~~~~~~bloemen~&~planten~~~~~~~~~~~~~~~~inspireren~&~innoveren~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~rijst~&~linzen~~~~~~~~~~~~~~~~~~~~~~~~~~mager~&~bleek~~~~~~~~~~~~~~~
\stoplines
\stopTEXpage
\stoptext
--->8
what would be the simple way to extract the position of the two period
(.) symbols in the first line, to be used in the two vertical bars
definitions above.
any hints?
.Floris
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