bug#5721: Feature request: Function that returns absolute coordinates

[YAMAMOTO Mitsuharu]

>>>>> On Fri, 16 Jul 2010 08:39:28 +0200, Jan Djärv <jan.h.d@swipnet.se> said:

> How do you find the difference between inner and outer window edges
> with such a function?

I think the primary intention of the left/top frame parameters are
coordinates of the top-left corner of the title bar, because
x_set_offset basically sets the outer window's position to
f->left_pos, and f->top_pos.  That is also consistent with the
geometry specification.  In that case, the difference can be computed
from these frame parameters and the absolute coordinates of top-left
corner of the frame.

                                     YAMAMOTO Mitsuharu
                                mituharu@math.s.chiba-u.ac.jp