bug#73207: 31.0.50; On PGTK frame outer-position and frame-monitor-workarea wrong.

[Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: David Koppelman <koppel@ece.lsu.edu>
>> Date: Thu, 12 Sep 2024 13:24:04 -0500
>> 
>> In a PGTK build of Emacs running on KDE Wayland (versions are below) the
>> position of a frame and the size of the workarea are wrong. These work
>> correctly in non-PGTK builds. For example, (frame-edges nil
>> 'outer-edges) returns (0 0 752 840), even though the top-left of the
>> frame is not over pixel 0,0. In a call to (frame-monitor-attributes) the
>> geometry and workarea dimensions are the same. The workarea is correctly
>> reported as smaller in non-PGTK builds.
>> 
>> I'd prefer that these be fixed, but if not they ought to be documented
>> in etc/PROBLEMS.
>
> Po Lu, any comments?
>
> ISTR that we already know about this issue, but for some reason I
> cannot find it in PROBLEMS or anywhere else.  What did I miss?

It's impossible to extract these values on Wayland because the protocol
is engineered to withhold them from programs.  There are entries for
similar protocol limitations in etc/PROBLEMS (e.g. warping or locating
the mouse pointer), but not the unavailability of frame geometry or
workspace dimensions.