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bug#16348: 24.3.50; Increasing internal-border-width cuts menubar and to

From: martin rudalics
Subject: bug#16348: 24.3.50; Increasing internal-border-width cuts menubar and toolbar on non-toolkit builds
Date: Sun, 05 Jan 2014 11:38:50 +0100

> Steps to reproduce:
> 1. Build emacs with --without-x-toolkit
> 2. $ emacs -Q &
> 3. (set-frame-parameter nil 'internal-border-width 10) C-j
> Then menubar and toolbar look as if they were cut by the internal
> border (see the attached screenshot).
> (We can also see several other garbages in the internal border area,
> but they had been there even on Emacs 24.3.)
> This does not happen with Lucid or GTK+ builds.

I can see this here as well.  There are many cases when redisplaying a
frame fails in this way, especially after setting a frame parameter.
Bug#14222 is another example.  When you maximize the frame and
subsequently restore its previous size the problems usually go away
(that's what I do in such cases).

What we needed here is some simple switch we can set and which causes
the redisplay engine to do a through redisplay instead of trying to be
clever and selectively clear/erase some space formerly occupied by a
scrollbar, fringe or border.


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