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bug#5523: Emacs 22.3 and 23.1 Mouse-1 Select (drag to resize) issue

From: martin rudalics
Subject: bug#5523: Emacs 22.3 and 23.1 Mouse-1 Select (drag to resize) issue
Date: Fri, 05 Feb 2010 08:41:00 +0100
User-agent: Thunderbird (Windows/20090302)

> As the bottom-most window is shrunk to minimum, and the visible text
> shrinks, suddenly the text displayed is from some other remote
> location.  The visible text should not jump to somewhere else.  Emacs
> 21.2 works correctly, 22.3 and 23.1 have this problem.
>     C-x 2 (split-window-vertically)
>    In bottom window:
>    M-> (end-of-buffer)
> With the left mouse down, drag the divider downwards until the lower
> window is minimum, then CONTINUE to drag INTO the lower window without
> releasing the left mouse.  The instant the mouse enters the lower
> window, observe the visible text jumps to the 1st line.  The visible
> text should remain at end-of-buffer.

Thanks for the report Bob.  The behavior you observe is a bug, indeed -
maybe in `adjust-window-trailing-edge' which appeared in Emacs 22 for
the first time.  Here I have rewritten the window-resizing code from
scratch and cannot see the bug any more.  So unless you consider this
issue as very important I'd suggest to postpone the fix till Emacs 24.


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