1 files changed, 101 insertions, 0 deletions
diff --git a/driver/atomswm.c b/driver/atomswm.c
new file mode 100644
index 0000000..887dc2c
--- /dev/null
+++ b/driver/atomswm.c
@@ -0,0 +1,101 @@
+/* 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);
+    }
+}