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/* xscreensaver-command, Copyright © 1991-2021 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xproto.h> /* for CARD32 */
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include "atoms.h"
#ifdef HAVE_UNAME
# include <sys/utsname.h> /* for uname() */
#endif /* HAVE_UNAME */
/* Set some properties to hopefully tell the window manager to leave us alone.
This is used by xscreensaver-gfx and xscreensaver-auth but not xscreensaver.
*/
void
xscreensaver_set_wm_atoms (Display *dpy, Window window, int width, int height,
Window for_window)
{
XClassHint class_hints;
XSizeHints size_hints;
# ifdef HAVE_UNAME
struct utsname uts;
# endif
Atom va[10];
long vl[10];
class_hints.res_name = "xscreensaver"; /* not progname */
class_hints.res_class = "XScreenSaver";
size_hints.flags = PMinSize | PMaxSize;
size_hints.min_width = size_hints.max_width = width; /* non-resizable */
size_hints.min_height = size_hints.max_height = height;
XStoreName (dpy, window, "XScreenSaver");
XSetClassHint (dpy, window, &class_hints);
XSetWMNormalHints (dpy, window, &size_hints);
/* XA_WM_COMMAND and _NET_WM_PID are later updated by spawn_screenhack. */
XChangeProperty (dpy, window, XA_WM_COMMAND,
XA_STRING, 8, PropModeReplace,
(unsigned char *) class_hints.res_name,
strlen (class_hints.res_name));
# ifdef HAVE_UNAME
if (! uname (&uts))
XChangeProperty (dpy, window,
XA_WM_CLIENT_MACHINE, XA_STRING, 8,
PropModeReplace, (unsigned char *) uts.nodename,
strlen (uts.nodename));
# endif
/* In the olden days, OverrideRedirect meant that the window manager did
not see or touch our window, but these days, compositing WMs like to
get up to all sorts of shenanigans. I don't know whether setting these
properties has any effect, but they *might* tell the WM to keep its
grubby paws off of our windows.
*/
vl[0] = 1; /* _NET_WM_BYPASS_COMPOSITOR = 1 */
XChangeProperty (dpy, window, XA_NET_WM_BYPASS_COMPOSITOR, XA_CARDINAL, 32,
PropModeReplace, (unsigned char *) vl, 1);
/* _NET_WM_STATE = [ _NET_WM_STATE_ABOVE, _NET_WM_STATE_FULLSCREEN ] */
va[0] = XA_NET_WM_STATE_ABOVE;
va[1] = XA_NET_WM_STATE_FULLSCREEN;
XChangeProperty (dpy, window, XA_NET_WM_STATE, XA_ATOM, 32,
PropModeReplace, (unsigned char *) va, 2);
/* As there is no _NET_WM_WINDOW_TYPE_SCREENSAVER, which property is
most likely to effectively communicate "on top always" to the WM?
_NET_WM_WINDOW_TYPE = NORMAL, SPLASH, DIALOG or NOTIFICATION? */
va[0] = XA_NET_WM_WINDOW_TYPE_NOTIFICATION;
XChangeProperty (dpy, window, XA_NET_WM_WINDOW_TYPE, XA_ATOM, 32,
PropModeReplace, (unsigned char *) va, 1);
if (for_window) /* This is the error dialog for a saver window */
{
va[0] = for_window;
/* _WM_TRANSIENT_FOR = screensaver_window */
XChangeProperty (dpy, window,
XA_WM_TRANSIENT_FOR, XA_WINDOW, 32,
PropModeReplace, (unsigned char *) va, 1);
}
}
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