bug#81193: 31.0.90; Wrong offsets in 'set-frame-size-and-position'

>
> Frame positioning per se is broken with the mutter window manager.
> AFACICT this does not affect 'set-frame-size-and-position' alone but
> also 'set-frame-position' and setting the 'left' and 'top' frame
> parameters.  Since frame positioning with PGTK Wayland is inhibited
> anyway, it will hardly be fixable on X either.


There is a distinction between child frames and "normal" frames. Child
frames can be positioned on PGTK Wayland.

Given the problems with different window managers and windowing systems in
general, I think the long term solution should be to not make child frames
top level surfaces at all. By top level surfaces I mean windowing system
windows/surfaces that involve the window manager. Toolkits like GTK do not
implement their widgets (buttons, etc) as top level surfaces, and I think
this could be a good choice for Emacs child frames too. This way the child
frames would be confined within the well defined application window area,
and not at the whim of various window managers.