From: Konstantin Kharlamov <Hi-Angel@yandex.ru>
Date: Sun, 16 Jun 2019 21:01:22 +0300
This constraint disallows standard compliant window managers to make
Emacs fullscreen on certain screen resolutions (ones that are not
multiple of width_inc and height_inc), or to expand Emacs to fill
free
space on the screen (on certain sizes too).
It doesn't seem to do anything useful otherwise; besides some WMs
(like i3wm) just ignore this property anyway.
* src/xterm.c (x_wm_set_size_hint): don't set width_inc,
height_inc, and
GDK_HINT_RESIZE_INC.
* src/gtkutil.c (x_wm_set_size_hint): don't set width_inc,
height_inc, and
PResizeInc.
* src/emacsgtkfixed.c (XSetWMSizeHints): don't set width_inc and
height_inc.
Thanks, but after so many years of doing this stuff the way we do, and
without any experts in this domain on board, I think we need to leave
behind a "fire escape" -- a variable that users could set from Lisp to
get back the old behavior. There are too many window managers out
there, and we cannot be sure none of them need the old code.