Re: Emacs's set-frame-size can not work well with gnome-shell?

[Adrián Medraño Calvo]

(Please correct mail address in CC to this one in further responses.)

> On 8. Apr 2020, at 10:45, martin rudalics <address@hidden> wrote:
> 
> > Have you tried the _NET_SUPPORTING_WM_CHECK window’s _NET_WM_NAME?
> 
> I'm struggling with that for quite some time already.  wmctrl uses it
> but I never got anything from a call like
> 
>  rc = XGetWindowProperty (dpy, dpyinfo->root_window,
>                          XInternAtom (dpy, "_NET_WM_NAME", False),
>                           0, max_len, False, XA_STRING,
> /**                      XInternAtom (dpy, "UTF8_STRING", False), **/
>                           &actual_type, &actual_format, &actual_size,
>                           &bytes_remaining, &name);
> 
> It reports success but name remains NULL.  If you have any clues about
> what I'm doing wrong I'd be all ears.
> 
> martin
> 


This works for me:

~~~
(let ((id (x-window-property "_NET_SUPPORTING_WM_CHECK" nil "WINDOW" 0 nil t)))
  (x-window-property "_NET_WM_NAME" nil "UTF8_STRING" id nil))
~~~

I can’t help translating to Xlib API, but it’s there in Emacs C code.

You can also check with xwininfo and xprop:

~~~
$ xwininfo -root
xwininfo: Window id: 0x111 (the root window) (has no name)
[…]
$ xprop -id 0x111
[…]
_NET_SUPPORTING_WM_CHECK(WINDOW): window id # 0x600002
[…]
$ xprop -id 0x600002
_NET_WM_NAME(UTF8_STRING) = "whatever"
~~~

Hope it helps,
Adrián.