bug#67753: 28.2, 29.1: Making frame invisible always affects frame position parameters

[Eli Zaretskii <eliz@gnu.org>]

Po Lu, any comments or suggestions on this matter?

> From: soliidne@gmail.com
> Date: Wed, 10 Jan 2024 12:25:19 +0200
> Cc: Po Lu <luangruo@yahoo.com>, 67753@debbugs.gnu.org
> 
> Hi !
> 
> Probable bug in void xfns.c → x_real_pos_and_offsets interpreting _NET_FRAME_EXTENTS set in
> Application Window Properties by WM.
> 
> Current visible Emacs frame parameters:
> 
> _NET_FRAME_EXTENTS(CARDINAL) = 5, 5, 29, 5
> 
> That means these are Emacs frame border and frame title thicknesses.
> 
> The Window Manager MUST set _NET_FRAME_EXTENTS to the extents of the window's frame.
> left, right, top and bottom are widths of the respective borders added by the Window Manager.
> -----
> Original Reference: [[https://specifications.freedesktop.org/wm-spec/1.4/ar01s05.html][Application
> Window Properties]]
> 
> On Tue, 09 Jan 2024 21:58:10 +0200
> Eli Zaretskii <eliz@gnu.org> wrote:
> 
> > Ping! Ping!  Can we make some progress here, please?
> > 
> > > Cc: 67753@debbugs.gnu.org
> > > Date: Sat, 23 Dec 2023 11:05:22 +0200
> > > From: Eli Zaretskii <eliz@gnu.org>
> > > 
> > > Ping!  Po Lu, can we make some progress here?
> > >   
> > > > From: soliidne@gmail.com
> > > > Date: Sat, 16 Dec 2023 14:53:47 +0200
> > > > Cc: Eli Zaretskii <eliz@gnu.org>, 67753@debbugs.gnu.org
> > > > 
> > > > On Sat, 16 Dec 2023 20:18:07 +0800
> > > > Po Lu <luangruo@yahoo.com> wrote:
> > > >   
> > > > > Eli Zaretskii <eliz@gnu.org> writes:
> > > > >   
> > > > > >> From: soliidne@gmail.com
> > > > > >> Date: Sun, 10 Dec 2023 19:45:49 +0200
> > > > > >> 
> > > > > >> Always for all frames, position constantly affected by: left
> > > > > >> - 5 and top - 29. It seems like a bug, but it could also be
> > > > > >> an oversight. Can someone comment please ?
> > > > > >> 
> > > > > >> Thanks !
> > > > > >> 
> > > > > >> xfwm4 4.18.0
> > > > > >> xorg-server 21.1.9
> > > > > >> Emacs 28.2, 29.1
> > > > > >> Archlinux
> > > > > >> 
> > > > > >> How to reproduce:
> > > > > >> #################
> > > > > >> 
> > > > > >> $ emacs --fg-daemon -Q
> > > > > >> ...
> > > > > >> Starting Emacs daemon.
> > > > > >> $ emacsclient --eval "(make-frame-on-display \":0\")"
> > > > > >> #<frame GNU Emacs at Elitebook 0x558cf8d7d120>
> > > > > >> $ emacsclient --eval "(frame-position (nth 0 (frame-list)))"
> > > > > >> (185 . 130)
> > > > > >> $ emacsclient --eval "(make-frame-invisible (nth 0
> > > > > >> (frame-list)) t)" nil
> > > > > >> $ emacsclient --eval "(frame-position (nth 0 (frame-list)))"
> > > > > >> (180 . 101)
> > > > > >> 
> > > > > >> Moving frame to left-top corner
> > > > > >> ###############################
> > > > > >> 
> > > > > >> $ emacsclient --eval "(make-frame-visible (nth 0
> > > > > >> (frame-list)))" #<frame GNU Emacs at Elitebook
> > > > > >> 0x558cf8d7d120> $ emacsclient --eval "(frame-position (nth 0
> > > > > >> 0x558cf8d7d120> (frame-list)))"
> > > > > >> (0 . 0)
> > > > > >> $ emacsclient --eval "(make-frame-invisible (nth 0
> > > > > >> (frame-list)) t)" nil
> > > > > >> $ emacsclient --eval "(frame-position (nth 0 (frame-list)))"
> > > > > >> (-5 . -29)
> > > > > >> $ emacsclient --eval "(make-frame-visible (nth 0
> > > > > >> (frame-list)))" #<frame GNU Emacs at Elitebook
> > > > > >> 0x558cf8d7d120> $ emacsclient --eval "(frame-position (nth 0
> > > > > >> 0x558cf8d7d120> (frame-list)))"
> > > > > >> (-5 . 0)
> > > > > >> $ emacsclient --eval "(make-frame-invisible (nth 0
> > > > > >> (frame-list)) t)" nil
> > > > > >> $ emacsclient --eval "(frame-position (nth 0 (frame-list)))"
> > > > > >> (-10 . -29)
> > > > > >> $ emacsclient --eval "(make-frame-visible (nth 0
> > > > > >> (frame-list)))" #<frame GNU Emacs at Elitebook
> > > > > >> 0x558cf8d7d120> $ emacsclient --eval "(frame-position (nth 0
> > > > > >> 0x558cf8d7d120> (frame-list)))"
> > > > > >> (-10 . 0)    
> > > > > >
> > > > > > Po Lu, any comments?    
> > > > > 
> > > > > Did the OP mention the toolkit Emacs was built with?  
> > > > 
> > > > $ emacsclient --eval "system-configuration-options"
> > > > "--sysconfdir=/etc --prefix=/usr --libexecdir=/usr/lib
> > > > --localstatedir=/var --with-cairo --with-harfbuzz -
> > > > -with-libsystemd --with-modules --with-x-toolkit=gtk3
> > > > 'CFLAGS=-march=x86-64 -mtune=generic -O2 - pipe -fno-plt
> > > > -fexceptions         -Wp,-D_FORTIFY_SOURCE=2 -Wformat
> > > > -Werror=format-security -fstack-clash-protection -fcf-protection
> > > > -g -ffile-prefix-map=/build/emacs/src=/usr/src/debug/emacs -
> > > > flto=auto'
> > > > 'LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now
> > > > -flto=auto'"  
> > > 
> > > 
> > > 
> > >