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Re: [Groff] Question about .trunc
From: |
Peter Schaffter |
Subject: |
Re: [Groff] Question about .trunc |
Date: |
Fri, 4 Nov 2016 10:48:28 -0400 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Nov 04, 2016, Tadziu Hoffmann wrote:
>
> > Should it say, instead:
> >
> > "...the amount of vertical space truncated from a .sp request
> > ^^^^^^^^^^^^^^^^^^
> > by the most recently sprung vertical position trap..."
>
> I believe that's how it was meant.
>
> The info file has this to say:
>
> [...] at the point a trap is sprung, [.trunc] represents
> the difference of what the vertical position would have been
> but for the trap, and what the vertical position actually is.
>
> If a position trap is sprung from a .sp request, the excess
> space is truncated, and the current vertical position is now
> the position of the trap -- if the trap were not there, the
> vertical position would be different. If normal text is output
> that springs the trap, *nothing is actually truncated* -- the
> vertical position is still the bottom of the text that was
> output, and would be the same if the trap were not there.
Thanks, Tadziu. Great explanation. I was conceptualizing things
wrong. I wonder, though, if the small emendation to the docs,
above, might be a good idea anyway, for clarity.
--
Peter Schaffter
http://www.schaffter.ca