Re: Window splitting issues with margins

[Eli Zaretskii <eliz@gnu.org>]

> From: Joost Kremers <joostkremers@fastmail.fm>
> Cc: martin rudalics <rudalics@gmx.at>, emacs-devel@gnu.org
> Date: Thu, 12 Nov 2015 22:38:38 +0100
> 
> > I'm not sure margins should be auto-adjusted at all.  Whatever
> > application sets up those margins, they most probably need all that
> > space, and Emacs should not second guess such applications.  For
> > example, linum-mode sets the margin just wide enough to display the
> > longest line number; make the margin smaller, and the numbers will be
> > truncated.  That's a bug in my book.
> 
> Perhaps what is needed is for a mode that uses the margins to be able to
> specify a minimum size for them, so that a window-resize can take that
> into account. That would allow other modes to use the margin flexibly.

If we are talking about the needs of window-resize, then let's think
in terms of that function's needs.  How about if a window or a buffer
could specify the minimum width of its text body, and window-resize
could then use that information when it decides how to split?