[texhax] need certain amount of room on page

tom sgouros tomfool at as220.org
Fri Jan 30 03:54:43 CET 2009

You want to look up \pagegoal and \pagetotal.

I did the following in a package years ago and it works ok, but the TeX
page-breaking algorithm means there is some fuzziness about what the
bottom of the page actually means and the last time I suggested
something like this, others here didn't think much of it.  You are
warned, but it works for me.



\newdimen\IN at spaceleft
\def\IN at pagespace{%
    \IN at spaceleft=\vsize%
    \IN at spaceleft=\pagegoal%
    \advance\IN at spaceleft by -\pagetotal%

D. R. Evans <doc.evans at gmail.com> wrote:

> I know I knew how to do this once upon a time, but that knowledge has
> disappeared into the mists of time :-(
> In plain TeX I want to do the following:
>   if there is X amount of remaining space on the current page:
>     do A
>   else
>     do B
> Can anyone suggest anything? I don't remember it as being difficult, but
> nothing I've tried this afternoon has quite done the job properly.
>   Doc
> -- 
> Web:  http://www.sff.net/people/N7DR
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 tomfool at as220 dot org

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