URL:
<https://savannah.gnu.org/bugs/?61507>
Summary: want mechanism for more reliable absolute vertical
positioning
Project: GNU troff
Submitted by: barx
Submitted on: Fri 19 Nov 2021 03:40:19 AM CST
Category: Core
Severity: 1 - Wish
Item Group: New feature
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Planned Release: None
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Details:
The | modifier for absolute vertical positioning is less than ideal.
One drawback, pointed out in bug #60820, is that it is not quite the
absolute-position indicator it purports to be, when used with, e.g., the \v
escape.
Another -- pointed out in an October email thread
(http://lists.gnu.org/r/groff/2021-10/msg00016.html) and, as of Sunday's
commit f7bbcd8f
<http://git.savannah.gnu.org/cgit/groff.git/commit/?id=f7bbcd8f>, documented
in Texinfo (though alluded to for many years before that, by the existence of
the example "y-from-top-down" macro in the .sp section) -- is that when used
in an .sp request, the motion unavoidably goes 1v further down than requested.
(There is a related issue with .mk/.rt.)
Brainstorming took place in the aforementioned thread, but whether the new
mechanism should be a new request, a new distance modifier akin to |, or
something else, has not been decided.
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