1 /* timers.c --- detecting when the user is idle, and other timer-related tasks.
2 * xscreensaver, Copyright (c) 1991-2014 Jamie Zawinski <jwz@jwz.org>
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation. No representations are made about the suitability of this
9 * software for any purpose. It is provided "as is" without express or
19 #include <X11/Intrinsic.h>
21 #include <X11/Xatom.h>
26 # include <X11/Xmu/Error.h>
28 # include <Xmu/Error.h>
30 # else /* !HAVE_XMU */
32 #endif /* !HAVE_XMU */
34 #ifdef HAVE_XIDLE_EXTENSION
35 #include <X11/extensions/xidle.h>
36 #endif /* HAVE_XIDLE_EXTENSION */
38 #ifdef HAVE_MIT_SAVER_EXTENSION
39 #include <X11/extensions/scrnsaver.h>
40 #endif /* HAVE_MIT_SAVER_EXTENSION */
42 #ifdef HAVE_SGI_SAVER_EXTENSION
43 #include <X11/extensions/XScreenSaver.h>
44 #endif /* HAVE_SGI_SAVER_EXTENSION */
47 #include <X11/extensions/Xrandr.h>
48 #endif /* HAVE_RANDR */
50 #include "xscreensaver.h"
53 #define ABS(x)((x)<0?-(x):(x))
56 #define MAX(x,y)((x)>(y)?(x):(y))
59 #ifdef HAVE_PROC_INTERRUPTS
60 static Bool proc_interrupts_activity_p (saver_info *si);
61 #endif /* HAVE_PROC_INTERRUPTS */
63 static void check_for_clock_skew (saver_info *si);
67 idle_timer (XtPointer closure, XtIntervalId *id)
69 saver_info *si = (saver_info *) closure;
71 /* What an amazingly shitty design. Not only does Xt execute timeout
72 events from XtAppNextEvent() instead of from XtDispatchEvent(), but
73 there is no way to tell Xt to block until there is an X event OR a
74 timeout happens. Once your timeout proc is called, XtAppNextEvent()
75 still won't return until a "real" X event comes in.
77 So this function pushes a stupid, gratuitous, unnecessary event back
78 on the event queue to force XtAppNextEvent to return Right Fucking Now.
79 When the code in sleep_until_idle() sees an event of type XAnyEvent,
80 which the server never generates, it knows that a timeout has occurred.
83 fake_event.type = 0; /* XAnyEvent type, ignored. */
84 fake_event.xany.display = si->dpy;
85 fake_event.xany.window = 0;
86 XPutBackEvent (si->dpy, &fake_event);
88 /* If we are the timer that just went off, clear the pointer to the id. */
91 if (si->timer_id && *id != si->timer_id)
92 abort(); /* oops, scheduled timer twice?? */
99 schedule_wakeup_event (saver_info *si, Time when, Bool verbose_p)
104 fprintf (stderr, "%s: idle_timer already running\n", blurb());
108 /* Wake up periodically to ask the server if we are idle. */
109 si->timer_id = XtAppAddTimeOut (si->app, when, idle_timer,
113 fprintf (stderr, "%s: starting idle_timer (%ld, %ld)\n",
114 blurb(), when, si->timer_id);
119 notice_events (saver_info *si, Window window, Bool top_p)
121 saver_preferences *p = &si->prefs;
122 XWindowAttributes attrs;
123 unsigned long events;
124 Window root, parent, *kids;
128 if (XtWindowToWidget (si->dpy, window))
129 /* If it's one of ours, don't mess up its event mask. */
132 if (!XQueryTree (si->dpy, window, &root, &parent, &kids, &nkids))
137 /* Figure out which screen this window is on, for the diagnostics. */
138 for (screen_no = 0; screen_no < si->nscreens; screen_no++)
139 if (root == RootWindowOfScreen (si->screens[screen_no].screen))
142 XGetWindowAttributes (si->dpy, window, &attrs);
143 events = ((attrs.all_event_masks | attrs.do_not_propagate_mask)
144 & (KeyPressMask | PropertyChangeMask));
146 /* Select for SubstructureNotify on all windows.
147 Select for PropertyNotify on all windows.
148 Select for KeyPress on all windows that already have it selected.
150 Note that we can't select for ButtonPress, because of X braindamage:
151 only one client at a time may select for ButtonPress on a given
152 window, though any number can select for KeyPress. Someone explain
155 So, if the user spends a while clicking the mouse without ever moving
156 the mouse or touching the keyboard, we won't know that they've been
157 active, and the screensaver will come on. That sucks, but I don't
158 know how to get around it.
160 Since X presents mouse wheels as clicks, this applies to those, too:
161 scrolling through a document using only the mouse wheel doesn't
162 count as activity... Fortunately, /proc/interrupts helps, on
163 systems that have it. Oh, if it's a PS/2 mouse, not serial or USB.
166 XSelectInput (si->dpy, window,
167 SubstructureNotifyMask | PropertyChangeMask | events);
169 if (top_p && p->debug_p && (events & KeyPressMask))
171 /* Only mention one window per tree (hack hack). */
172 fprintf (stderr, "%s: %d: selected KeyPress on 0x%lX\n",
173 blurb(), screen_no, (unsigned long) window);
180 notice_events (si, kids [--nkids], top_p);
181 XFree ((char *) kids);
187 BadWindow_ehandler (Display *dpy, XErrorEvent *error)
189 /* When we notice a window being created, we spawn a timer that waits
190 30 seconds or so, and then selects events on that window. This error
191 handler is used so that we can cope with the fact that the window
192 may have been destroyed <30 seconds after it was created.
194 if (error->error_code == BadWindow ||
195 error->error_code == BadMatch ||
196 error->error_code == BadDrawable)
199 return saver_ehandler (dpy, error);
203 struct notice_events_timer_arg {
209 notice_events_timer (XtPointer closure, XtIntervalId *id)
211 struct notice_events_timer_arg *arg =
212 (struct notice_events_timer_arg *) closure;
214 XErrorHandler old_handler = XSetErrorHandler (BadWindow_ehandler);
216 saver_info *si = arg->si;
217 Window window = arg->w;
220 notice_events (si, window, True);
221 XSync (si->dpy, False);
222 XSetErrorHandler (old_handler);
226 start_notice_events_timer (saver_info *si, Window w, Bool verbose_p)
228 saver_preferences *p = &si->prefs;
229 struct notice_events_timer_arg *arg =
230 (struct notice_events_timer_arg *) malloc(sizeof(*arg));
233 XtAppAddTimeOut (si->app, p->notice_events_timeout, notice_events_timer,
237 fprintf (stderr, "%s: starting notice_events_timer for 0x%X (%lu)\n",
238 blurb(), (unsigned int) w, p->notice_events_timeout);
242 /* When the screensaver is active, this timer will periodically change
246 cycle_timer (XtPointer closure, XtIntervalId *id)
248 saver_info *si = (saver_info *) closure;
249 saver_preferences *p = &si->prefs;
250 Time how_long = p->cycle;
252 if (si->selection_mode > 0 &&
253 screenhack_running_p (si))
254 /* If we're in "SELECT n" mode, the cycle timer going off will just
255 restart this same hack again. There's not much point in doing this
256 every 5 or 10 minutes, but on the other hand, leaving one hack running
257 for days is probably not a great idea, since they tend to leak and/or
258 crash. So, restart the thing once an hour. */
259 how_long = 1000 * 60 * 60;
264 fprintf (stderr, "%s: dialog box up; delaying hack change.\n",
266 how_long = 30000; /* 30 secs */
271 maybe_reload_init_file (si);
272 for (i = 0; i < si->nscreens; i++)
273 kill_screenhack (&si->screens[i]);
275 raise_window (si, True, True, False);
277 if (!si->throttled_p)
278 for (i = 0; i < si->nscreens; i++)
279 spawn_screenhack (&si->screens[i]);
283 fprintf (stderr, "%s: not launching new hack (throttled.)\n",
290 si->cycle_id = XtAppAddTimeOut (si->app, how_long, cycle_timer,
294 fprintf (stderr, "%s: starting cycle_timer (%ld, %ld)\n",
295 blurb(), how_long, si->cycle_id);
300 fprintf (stderr, "%s: not starting cycle_timer: how_long == %ld\n",
301 blurb(), (unsigned long) how_long);
307 activate_lock_timer (XtPointer closure, XtIntervalId *id)
309 saver_info *si = (saver_info *) closure;
310 saver_preferences *p = &si->prefs;
313 fprintf (stderr, "%s: timed out; activating lock.\n", blurb());
314 set_locked_p (si, True);
318 /* Call this when user activity (or "simulated" activity) has been noticed.
321 reset_timers (saver_info *si)
323 saver_preferences *p = &si->prefs;
324 if (si->using_mit_saver_extension || si->using_sgi_saver_extension)
330 fprintf (stderr, "%s: killing idle_timer (%ld, %ld)\n",
331 blurb(), p->timeout, si->timer_id);
332 XtRemoveTimeOut (si->timer_id);
336 schedule_wakeup_event (si, p->timeout, p->debug_p); /* sets si->timer_id */
338 if (si->cycle_id) abort (); /* no cycle timer when inactive */
340 si->last_activity_time = time ((time_t *) 0);
342 /* This will (hopefully, supposedly) tell the server to re-set its
343 DPMS timer. Without this, the -deactivate clientmessage would
344 prevent xscreensaver from blanking, but would not prevent the
345 monitor from powering down. */
347 /* #### With some servers, this causes the screen to flicker every
348 time a key is pressed! Ok, I surrender. I give up on ever
349 having DPMS work properly.
351 XForceScreenSaver (si->dpy, ScreenSaverReset);
353 /* And if the monitor is already powered off, turn it on.
354 You'd think the above would do that, but apparently not? */
355 monitor_power_on (si, True);
361 /* Returns true if a mouse has moved since the last time we checked.
362 Small motions (of less than "hysteresis" pixels/second) are ignored.
365 device_pointer_moved_p (saver_info *si, poll_mouse_data *last_poll_mouse,
366 poll_mouse_data *this_poll_mouse, Bool mods_p,
367 const char *debug_type, int debug_id)
369 saver_preferences *p = &si->prefs;
371 unsigned int distance, dps;
372 unsigned long seconds = 0;
373 Bool moved_p = False;
375 distance = MAX (ABS (last_poll_mouse->root_x - this_poll_mouse->root_x),
376 ABS (last_poll_mouse->root_y - this_poll_mouse->root_y));
377 seconds = (this_poll_mouse->time - last_poll_mouse->time);
380 /* When the screen is blanked, we get MotionNotify events, but when not
381 blanked, we poll only every 5 seconds, and that's not enough resolution
382 to do hysteresis based on a 1 second interval. So, assume that any
383 motion we've seen during the 5 seconds when our eyes were closed happened
384 in the last 1 second instead.
386 if (seconds > 1) seconds = 1;
388 dps = (seconds <= 0 ? distance : (distance / seconds));
390 /* Motion only counts if the rate is more than N pixels per second.
392 if (dps >= p->pointer_hysteresis &&
396 /* If the mouse is not on this screen but used to be, that's motion.
397 If the mouse was not on this screen, but is now, that's motion.
400 Bool on_screen_p = (this_poll_mouse->root_x != -1 &&
401 this_poll_mouse->root_y != -1);
402 Bool was_on_screen_p = (last_poll_mouse->root_x != -1 &&
403 last_poll_mouse->root_y != -1);
405 if (on_screen_p != was_on_screen_p)
409 if (p->debug_p && (distance != 0 || moved_p))
411 fprintf (stderr, "%s: %s %d: pointer %s", blurb(), debug_type, debug_id,
412 (moved_p ? "moved: " : "ignored:"));
413 if (last_poll_mouse->root_x == -1)
414 fprintf (stderr, "off screen");
416 fprintf (stderr, "%d,%d",
417 last_poll_mouse->root_x,
418 last_poll_mouse->root_y);
419 fprintf (stderr, " -> ");
420 if (this_poll_mouse->root_x == -1)
421 fprintf (stderr, "off screen");
423 fprintf (stderr, "%d,%d", this_poll_mouse->root_x,
424 this_poll_mouse->root_y);
425 if (last_poll_mouse->root_x != -1 && this_poll_mouse->root_x != -1)
426 fprintf (stderr, " (%d,%d; %d/%lu=%d)",
427 ABS(last_poll_mouse->root_x - this_poll_mouse->root_x),
428 ABS(last_poll_mouse->root_y - this_poll_mouse->root_y),
429 distance, seconds, dps);
431 fprintf (stderr, ".\n");
436 this_poll_mouse->mask != last_poll_mouse->mask)
441 fprintf (stderr, "%s: %s %d: modifiers changed: 0x%04x -> 0x%04x.\n",
442 blurb(), debug_type, debug_id,
443 last_poll_mouse->mask, this_poll_mouse->mask);
446 last_poll_mouse->child = this_poll_mouse->child;
447 last_poll_mouse->mask = this_poll_mouse->mask;
449 if (moved_p || seconds > 0)
451 last_poll_mouse->time = this_poll_mouse->time;
452 last_poll_mouse->root_x = this_poll_mouse->root_x;
453 last_poll_mouse->root_y = this_poll_mouse->root_y;
459 /* Returns true if core mouse pointer has moved since the last time we checked.
462 pointer_moved_p (saver_screen_info *ssi, Bool mods_p)
464 saver_info *si = ssi->global;
467 poll_mouse_data this_poll_mouse;
470 /* don't check xinerama pseudo-screens. */
471 if (!ssi->real_screen_p) return False;
473 this_poll_mouse.time = time ((time_t *) 0);
475 if (!XQueryPointer (si->dpy, ssi->screensaver_window, &root,
476 &this_poll_mouse.child,
477 &this_poll_mouse.root_x, &this_poll_mouse.root_y,
478 &x, &y, &this_poll_mouse.mask))
480 /* If XQueryPointer() returns false, the mouse is not on this screen.
482 this_poll_mouse.root_x = -1;
483 this_poll_mouse.root_y = -1;
484 this_poll_mouse.child = 0;
485 this_poll_mouse.mask = 0;
488 si->last_activity_screen = ssi;
490 return device_pointer_moved_p(si, &(ssi->last_poll_mouse), &this_poll_mouse,
491 mods_p, "screen", ssi->number);
495 /* When we aren't using a server extension, this timer is used to periodically
496 wake up and poll the mouse position, which is possibly more reliable than
497 selecting motion events on every window.
500 check_pointer_timer (XtPointer closure, XtIntervalId *id)
503 saver_info *si = (saver_info *) closure;
504 saver_preferences *p = &si->prefs;
505 Bool active_p = False;
507 if (!si->using_proc_interrupts &&
508 (si->using_xidle_extension ||
509 si->using_mit_saver_extension ||
510 si->using_sgi_saver_extension))
511 /* If an extension is in use, we should not be polling the mouse.
512 Unless we're also checking /proc/interrupts, in which case, we should.
516 if (id && *id == si->check_pointer_timer_id) /* this is us - it's expired */
517 si->check_pointer_timer_id = 0;
519 if (si->check_pointer_timer_id) /* only queue one at a time */
520 XtRemoveTimeOut (si->check_pointer_timer_id);
522 si->check_pointer_timer_id = /* now re-queue */
523 XtAppAddTimeOut (si->app, p->pointer_timeout, check_pointer_timer,
526 for (i = 0; i < si->nscreens; i++)
528 saver_screen_info *ssi = &si->screens[i];
529 if (pointer_moved_p (ssi, True))
533 #ifdef HAVE_PROC_INTERRUPTS
535 si->using_proc_interrupts &&
536 proc_interrupts_activity_p (si))
540 #endif /* HAVE_PROC_INTERRUPTS */
545 check_for_clock_skew (si);
549 /* An unfortunate situation is this: the saver is not active, because the
550 user has been typing. The machine is a laptop. The user closes the lid
551 and suspends it. The CPU halts. Some hours later, the user opens the
552 lid. At this point, Xt's timers will fire, and xscreensaver will blank
555 So far so good -- well, not really, but it's the best that we can do,
556 since the OS doesn't send us a signal *before* shutdown -- but if the
557 user had delayed locking (lockTimeout > 0) then we should start off
558 in the locked state, rather than only locking N minutes from when the
559 lid was opened. Also, eschewing fading is probably a good idea, to
560 clamp down as soon as possible.
562 We only do this when we'd be polling the mouse position anyway.
563 This amounts to an assumption that machines with APM support also
564 have /proc/interrupts.
567 check_for_clock_skew (saver_info *si)
569 saver_preferences *p = &si->prefs;
570 time_t now = time ((time_t *) 0);
571 long shift = now - si->last_wall_clock_time;
575 int i = (si->last_wall_clock_time == 0 ? 0 : shift);
577 "%s: checking wall clock for hibernation (%d:%02d:%02d).\n",
579 (i / (60 * 60)), ((i / 60) % 60), (i % 60));
582 if (si->last_wall_clock_time != 0 &&
583 shift > (p->timeout / 1000))
586 fprintf (stderr, "%s: wall clock has jumped by %ld:%02ld:%02ld%s\n",
588 (shift / (60 * 60)), ((shift / 60) % 60), (shift % 60),
589 (p->mode == DONT_BLANK ? " while saver disabled" : ""));
591 /* If the saver is entirely disabled, there's no need to do the
592 emergency-blank-and-lock thing.
594 if (p->mode != DONT_BLANK)
596 si->emergency_lock_p = True;
597 idle_timer ((XtPointer) si, 0);
601 si->last_wall_clock_time = now;
607 dispatch_event (saver_info *si, XEvent *event)
609 /* If this is for the splash dialog, pass it along.
610 Note that the password dialog is handled with its own event loop,
611 so events for that window will never come through here.
613 if (si->splash_dialog && event->xany.window == si->splash_dialog)
614 handle_splash_event (si, event);
616 XtDispatchEvent (event);
621 swallow_unlock_typeahead_events (saver_info *si, XEvent *e)
627 memset (buf, 0, sizeof(buf));
633 if (event.xany.type == KeyPress)
636 int size = XLookupString ((XKeyEvent *) &event, s, 1, 0, 0);
637 if (size != 1) continue;
640 case '\010': case '\177': /* Backspace */
643 case '\025': case '\030': /* Erase line */
644 case '\012': case '\015': /* Enter */
645 case '\033': /* ESC */
648 case '\040': /* Space */
650 break; /* ignore space at beginning of line */
651 /* else, fall through */
658 } while (i < sizeof(buf)-1 &&
659 XCheckMaskEvent (si->dpy, KeyPressMask, &event));
663 if (si->unlock_typeahead)
665 memset (si->unlock_typeahead, 0, strlen(si->unlock_typeahead));
666 free (si->unlock_typeahead);
670 si->unlock_typeahead = strdup (buf);
672 si->unlock_typeahead = 0;
674 memset (buf, 0, sizeof(buf));
678 /* methods of detecting idleness:
680 explicitly informed by SGI SCREEN_SAVER server event;
681 explicitly informed by MIT-SCREEN-SAVER server event;
682 poll server idle time with XIDLE extension;
683 select events on all windows, and note absence of recent events;
684 note that /proc/interrupts has not changed in a while;
685 activated by clientmessage.
687 methods of detecting non-idleness:
689 read events on the xscreensaver window;
690 explicitly informed by SGI SCREEN_SAVER server event;
691 explicitly informed by MIT-SCREEN-SAVER server event;
692 select events on all windows, and note events on any of them;
693 note that a client updated their window's _NET_WM_USER_TIME property;
694 note that /proc/interrupts has changed;
695 deactivated by clientmessage.
697 I trust that explains why this function is a big hairy mess.
700 sleep_until_idle (saver_info *si, Bool until_idle_p)
702 saver_preferences *p = &si->prefs;
704 /* We have to go through this union bullshit because gcc-4.4.0 has
705 stricter struct-aliasing rules. Without this, the optimizer
711 XRRScreenChangeNotifyEvent xrr_event;
712 # endif /* HAVE_RANDR */
713 # ifdef HAVE_MIT_SAVER_EXTENSION
714 XScreenSaverNotifyEvent sevent;
715 # endif /* HAVE_MIT_SAVER_EXTENSION */
718 /* We need to select events on all windows if we're not using any extensions.
719 Otherwise, we don't need to. */
720 Bool scanning_all_windows = !(si->using_xidle_extension ||
721 si->using_mit_saver_extension ||
722 si->using_sgi_saver_extension);
724 /* We need to periodically wake up and check for idleness if we're not using
725 any extensions, or if we're using the XIDLE extension. The other two
726 extensions explicitly deliver events when we go idle/non-idle, so we
727 don't need to poll. */
728 Bool polling_for_idleness = !(si->using_mit_saver_extension ||
729 si->using_sgi_saver_extension);
731 /* Whether we need to periodically wake up and check to see if the mouse has
732 moved. We only need to do this when not using any extensions. The reason
733 this isn't the same as `polling_for_idleness' is that the "idleness" poll
734 can happen (for example) 5 minutes from now, whereas the mouse-position
735 poll should happen with low periodicity. We don't need to poll the mouse
736 position with the XIDLE extension, but we do need to periodically wake up
737 and query the server with that extension. For our purposes, polling
738 /proc/interrupts is just like polling the mouse position. It has to
739 happen on the same kind of schedule. */
740 Bool polling_mouse_position = (si->using_proc_interrupts ||
741 !(si->using_xidle_extension ||
742 si->using_mit_saver_extension ||
743 si->using_sgi_saver_extension) ||
744 si->using_xinput_extension);
746 const char *why = 0; /* What caused the idle-state to change? */
750 if (polling_for_idleness)
751 /* This causes a no-op event to be delivered to us in a while, so that
752 we come back around through the event loop again. */
753 schedule_wakeup_event (si, p->timeout, p->debug_p);
755 if (polling_mouse_position)
756 /* Check to see if the mouse has moved, and set up a repeating timer
757 to do so periodically (typically, every 5 seconds.) */
758 check_pointer_timer ((XtPointer) si, 0);
763 XtAppNextEvent (si->app, &event.x_event);
765 switch (event.x_event.xany.type) {
766 case 0: /* our synthetic "timeout" event has been signalled */
771 /* We may be idle; check one last time to see if the mouse has
772 moved, just in case the idle-timer went off within the 5 second
773 window between mouse polling. If the mouse has moved, then
774 check_pointer_timer() will reset last_activity_time.
776 if (polling_mouse_position)
777 check_pointer_timer ((XtPointer) si, 0);
779 #ifdef HAVE_XIDLE_EXTENSION
780 if (si->using_xidle_extension)
782 /* The XIDLE extension uses the synthetic event to prod us into
783 re-asking the server how long the user has been idle. */
784 if (! XGetIdleTime (si->dpy, &idle))
786 fprintf (stderr, "%s: XGetIdleTime() failed.\n", blurb());
787 saver_exit (si, 1, 0);
791 #endif /* HAVE_XIDLE_EXTENSION */
792 #ifdef HAVE_MIT_SAVER_EXTENSION
793 if (si->using_mit_saver_extension)
795 /* We don't need to do anything in this case - the synthetic
796 event isn't necessary, as we get sent specific events
797 to wake us up. In fact, this event generally shouldn't
798 be being delivered when the MIT extension is in use. */
802 #endif /* HAVE_MIT_SAVER_EXTENSION */
803 #ifdef HAVE_SGI_SAVER_EXTENSION
804 if (si->using_sgi_saver_extension)
806 /* We don't need to do anything in this case - the synthetic
807 event isn't necessary, as we get sent specific events
808 to wake us up. In fact, this event generally shouldn't
809 be being delivered when the SGI extension is in use. */
813 #endif /* HAVE_SGI_SAVER_EXTENSION */
815 /* Otherwise, no server extension is in use. The synthetic
816 event was to tell us to wake up and see if the user is now
817 idle. Compute the amount of idle time by comparing the
818 `last_activity_time' to the wall clock. The l_a_t was set
819 by calling `reset_timers()', which is called only in only
820 two situations: when polling the mouse position has revealed
821 the the mouse has moved (user activity) or when we have read
822 an event (again, user activity.)
824 idle = 1000 * (si->last_activity_time - time ((time_t *) 0));
827 if (idle >= p->timeout)
829 /* Look, we've been idle long enough. We're done. */
833 else if (si->emergency_lock_p)
835 /* Oops, the wall clock has jumped far into the future, so
836 we need to lock down in a hurry! */
837 why = "large wall clock change";
842 /* The event went off, but it turns out that the user has not
843 yet been idle for long enough. So re-signal the event.
844 Be economical: if we should blank after 5 minutes, and the
845 user has been idle for 2 minutes, then set this timer to
848 if (polling_for_idleness)
849 schedule_wakeup_event (si, p->timeout - idle, p->debug_p);
855 if (handle_clientmessage (si, &event.x_event, until_idle_p))
857 why = "ClientMessage";
863 /* A window has been created on the screen somewhere. If we're
864 supposed to scan all windows for events, prepare this window. */
865 if (scanning_all_windows)
867 Window w = event.x_event.xcreatewindow.window;
868 start_notice_events_timer (si, w, p->debug_p);
874 /* Ignore release events so that hitting ESC at the password dialog
875 doesn't result in the password dialog coming right back again when
876 the fucking release key is seen! */
877 /* case KeyRelease:*/
878 /* case ButtonRelease:*/
883 Window root=0, window=0;
885 const char *type = 0;
886 if (event.x_event.xany.type == MotionNotify)
888 /*type = "MotionNotify";*/
889 root = event.x_event.xmotion.root;
890 window = event.x_event.xmotion.window;
891 x = event.x_event.xmotion.x_root;
892 y = event.x_event.xmotion.y_root;
894 else if (event.x_event.xany.type == KeyPress)
897 root = event.x_event.xkey.root;
898 window = event.x_event.xkey.window;
901 else if (event.x_event.xany.type == ButtonPress)
903 type = "ButtonPress";
904 root = event.x_event.xkey.root;
905 window = event.x_event.xkey.window;
906 x = event.x_event.xmotion.x_root;
907 y = event.x_event.xmotion.y_root;
913 for (i = 0; i < si->nscreens; i++)
914 if (root == RootWindowOfScreen (si->screens[i].screen))
916 fprintf (stderr,"%s: %d: %s on 0x%lx",
917 blurb(), i, type, (unsigned long) window);
919 /* Be careful never to do this unless in -debug mode, as
920 this could expose characters from the unlock password. */
921 if (p->debug_p && event.x_event.xany.type == KeyPress)
925 XLookupString (&event.x_event.xkey, &c, 1, &keysym, 0);
926 fprintf (stderr, " (%s%s)",
927 (event.x_event.xkey.send_event ? "synthetic " : ""),
928 XKeysymToString (keysym));
932 fprintf (stderr, "\n");
934 fprintf (stderr, " at %d,%d.\n", x, y);
938 /* If any widgets want to handle this event, let them. */
939 dispatch_event (si, &event.x_event);
942 /* If we got a MotionNotify event, figure out what screen it
943 was on and poll the mouse there: if the mouse hasn't moved
944 far enough to count as "real" motion, then ignore this
947 if (event.x_event.xany.type == MotionNotify)
950 for (i = 0; i < si->nscreens; i++)
951 if (event.x_event.xmotion.root ==
952 RootWindowOfScreen (si->screens[i].screen))
954 if (i < si->nscreens)
956 if (!pointer_moved_p (&si->screens[i], False))
962 /* We got a user event.
963 If we're waiting for the user to become active, this is it.
964 If we're waiting until the user becomes idle, reset the timers
965 (since now we have longer to wait.)
970 (event.x_event.xany.type == MotionNotify ||
971 event.x_event.xany.type == KeyRelease))
972 /* When we're demoing a single hack, mouse motion doesn't
973 cause deactivation. Only clicks and keypresses do. */
977 /* If we're not demoing, then any activity causes deactivation.
979 why = (event.x_event.xany.type == MotionNotify ?"mouse motion":
980 event.x_event.xany.type == KeyPress?"keyboard activity":
981 event.x_event.xany.type == ButtonPress ? "mouse click" :
982 "unknown user activity");
993 /* Starting in late 2014, GNOME programs don't actually select for
994 or receive KeyPress events: they do it behind the scenes through
995 some kind of Input Method magic, even when running in an en_US
996 locale. However, those applications *do* update the WM_USER_TIME
997 property on their own windows every time they recieve a secret
998 KeyPress, so we must *also* monitor that property on every
999 window, and treat changes to it as identical to KeyPress.
1001 _NET_WM_USER_TIME is documented (such as it is) here:
1003 http://standards.freedesktop.org/wm-spec/latest/ar01s05.html
1008 "Contains the XServer time at which last user activity in this
1009 window took place. [...] A client [...] might, for example,
1010 use the timestamp of the last KeyPress or ButtonPress event."
1012 As of early 2016, KDE4 does something really stupid, though: some
1013 hidden power management thing reduces the display brightness 150
1014 seconds after the screen is blanked -- and sets a WM_USER_TIME
1015 property on a hidden "kded4" window whose time is in the distant
1016 past (the time at which the X server launched).
1018 So we ignore any WM_USER_TIME whose timestamp is more than a
1021 if (event.x_event.xproperty.state == PropertyNewValue &&
1022 event.x_event.xproperty.atom == XA_NET_WM_USER_TIME)
1024 int threshold = 2; /* seconds */
1025 Bool bogus_p = True;
1026 Window w = event.x_event.xproperty.window;
1030 unsigned long nitems, bytesafter;
1031 unsigned char *data = 0;
1032 Cardinal user_time = 0;
1033 XErrorHandler old_handler = XSetErrorHandler (BadWindow_ehandler);
1035 if (XGetWindowProperty (si->dpy, w,
1036 XA_NET_WM_USER_TIME, 0L, 1L, False,
1037 XA_CARDINAL, &type, &format, &nitems,
1041 type == XA_CARDINAL &&
1046 user_time = ((Cardinal *) data)[0];
1047 diff = event.x_event.xproperty.time - user_time;
1048 if (diff >= 0 && diff < threshold)
1052 if (data) XFree (data);
1054 why = "WM_USER_TIME";
1058 XWindowAttributes xgwa;
1061 XGetWindowAttributes (si->dpy, w, &xgwa);
1062 for (i = 0; i < si->nscreens; i++)
1063 if (xgwa.root == RootWindowOfScreen (si->screens[i].screen))
1065 fprintf (stderr,"%s: %d: %s = %ld%s on 0x%lx\n",
1066 blurb(), i, why, (unsigned long) user_time,
1067 (bogus_p ? " (bad)" : ""),
1071 XSync (si->dpy, False);
1072 XSetErrorHandler (old_handler);
1076 else if (until_idle_p)
1085 #ifdef HAVE_MIT_SAVER_EXTENSION
1086 if (event.x_event.type == si->mit_saver_ext_event_number)
1088 /* This event's number is that of the MIT-SCREEN-SAVER server
1089 extension. This extension has one event number, and the event
1090 itself contains sub-codes that say what kind of event it was
1091 (an "idle" or "not-idle" event.)
1093 if (event.sevent.state == ScreenSaverOn)
1097 fprintf (stderr, "%s: MIT ScreenSaverOn event received.\n",
1100 /* Get the "real" server window(s) out of the way as soon
1102 for (i = 0; i < si->nscreens; i++)
1104 saver_screen_info *ssi = &si->screens[i];
1105 if (ssi->server_mit_saver_window &&
1106 window_exists_p (si->dpy,
1107 ssi->server_mit_saver_window))
1108 XUnmapWindow (si->dpy, ssi->server_mit_saver_window);
1111 if (event.sevent.kind != ScreenSaverExternal)
1114 "%s: ScreenSaverOn event wasn't of type External!\n",
1120 why = "MIT ScreenSaverOn";
1124 else if (event.sevent.state == ScreenSaverOff)
1127 fprintf (stderr, "%s: MIT ScreenSaverOff event received.\n",
1131 why = "MIT ScreenSaverOff";
1137 "%s: unknown MIT-SCREEN-SAVER event %d received!\n",
1138 blurb(), event.sevent.state);
1142 #endif /* HAVE_MIT_SAVER_EXTENSION */
1145 #ifdef HAVE_SGI_SAVER_EXTENSION
1146 if (event.x_event.type == (si->sgi_saver_ext_event_number + ScreenSaverStart))
1148 /* The SGI SCREEN_SAVER server extension has two event numbers,
1149 and this event matches the "idle" event. */
1151 fprintf (stderr, "%s: SGI ScreenSaverStart event received.\n",
1156 why = "SGI ScreenSaverStart";
1160 else if (event.x_event.type == (si->sgi_saver_ext_event_number +
1163 /* The SGI SCREEN_SAVER server extension has two event numbers,
1164 and this event matches the "idle" event. */
1166 fprintf (stderr, "%s: SGI ScreenSaverEnd event received.\n",
1170 why = "SGI ScreenSaverEnd";
1175 #endif /* HAVE_SGI_SAVER_EXTENSION */
1178 /* If we got a MotionNotify event, check to see if the mouse has
1179 moved far enough to count as "real" motion, if not, then ignore
1182 if ((si->num_xinput_devices > 0) &&
1183 (event.x_event.type == si->xinput_DeviceMotionNotify))
1185 XDeviceMotionEvent *dme = (XDeviceMotionEvent *) &event;
1186 poll_mouse_data *last_poll_mouse = NULL;
1189 for (d = 0; d < si->num_xinput_devices; d++)
1191 if (si->xinput_devices[d].device->device_id == dme->deviceid)
1193 last_poll_mouse = &(si->xinput_devices[d].last_poll_mouse);
1198 if (last_poll_mouse)
1200 poll_mouse_data this_poll_mouse;
1201 this_poll_mouse.root_x = dme->x_root;
1202 this_poll_mouse.root_y = dme->y_root;
1203 this_poll_mouse.child = dme->subwindow;
1204 this_poll_mouse.mask = dme->device_state;
1205 this_poll_mouse.time = dme->time / 1000; /* milliseconds */
1207 if (!device_pointer_moved_p (si, last_poll_mouse,
1208 &this_poll_mouse, False,
1209 "device", dme->deviceid))
1212 else if (p->debug_p)
1214 "%s: received MotionNotify from unknown device %d\n",
1215 blurb(), (int) dme->deviceid);
1218 if ((!until_idle_p) &&
1219 (si->num_xinput_devices > 0) &&
1220 (event.x_event.type == si->xinput_DeviceMotionNotify ||
1221 event.x_event.type == si->xinput_DeviceButtonPress))
1222 /* Ignore DeviceButtonRelease, see ButtonRelease comment above. */
1225 dispatch_event (si, &event.x_event);
1226 if (si->demoing_p &&
1227 event.x_event.type == si->xinput_DeviceMotionNotify)
1228 /* When we're demoing a single hack, mouse motion doesn't
1229 cause deactivation. Only clicks and keypresses do. */
1232 /* If we're not demoing, then any activity causes deactivation.
1235 why = (event.x_event.type == si->xinput_DeviceMotionNotify
1236 ? "XI mouse motion" :
1237 event.x_event.type == si->xinput_DeviceButtonPress
1238 ? "XI mouse click" : "unknown XINPUT event");
1243 #endif /* HAVE_XINPUT */
1246 if (si->using_randr_extension &&
1247 (event.x_event.type ==
1248 (si->randr_event_number + RRScreenChangeNotify)))
1250 /* The Resize and Rotate extension sends an event when the
1251 size, rotation, or refresh rate of any screen has changed.
1255 /* XRRRootToScreen is in Xrandr.h 1.4, 2001/06/07 */
1256 int screen = XRRRootToScreen (si->dpy, event.xrr_event.window);
1257 fprintf (stderr, "%s: %d: screen change event received\n",
1261 # ifdef RRScreenChangeNotifyMask
1262 /* Inform Xlib that it's ok to update its data structures. */
1263 XRRUpdateConfiguration (&event.x_event); /* Xrandr.h 1.9, 2002/09/29 */
1264 # endif /* RRScreenChangeNotifyMask */
1266 /* Resize the existing xscreensaver windows and cached ssi data. */
1267 if (update_screen_layout (si))
1271 fprintf (stderr, "%s: new layout:\n", blurb());
1272 describe_monitor_layout (si);
1274 resize_screensaver_window (si);
1278 #endif /* HAVE_RANDR */
1280 /* Just some random event. Let the Widgets handle it, if desired. */
1281 dispatch_event (si, &event.x_event);
1288 if (! why) why = "unknown reason";
1289 fprintf (stderr, "%s: %s (%s)\n", blurb(),
1290 (until_idle_p ? "user is idle" : "user is active"),
1294 /* If there's a user event on the queue, swallow it.
1295 If we're using a server extension, and the user becomes active, we
1296 get the extension event before the user event -- so the keypress or
1297 motion or whatever is still on the queue. This makes "unfade" not
1298 work, because it sees that event, and bugs out. (This problem
1299 doesn't exhibit itself without an extension, because in that case,
1300 there's only one event generated by user activity, not two.)
1302 if (!until_idle_p && si->locked_p)
1303 swallow_unlock_typeahead_events (si, &event.x_event);
1305 while (XCheckMaskEvent (si->dpy,
1306 (KeyPressMask|ButtonPressMask|PointerMotionMask),
1311 if (si->check_pointer_timer_id)
1313 XtRemoveTimeOut (si->check_pointer_timer_id);
1314 si->check_pointer_timer_id = 0;
1318 XtRemoveTimeOut (si->timer_id);
1322 if (until_idle_p && si->cycle_id) /* no cycle timer when inactive */
1328 /* Some crap for dealing with /proc/interrupts.
1330 On Linux systems, it's possible to see the hardware interrupt count
1331 associated with the keyboard. We can therefore use that as another method
1332 of detecting idleness.
1334 Why is it a good idea to do this? Because it lets us detect keyboard
1335 activity that is not associated with X events. For example, if the user
1336 has switched to another virtual console, it's good for xscreensaver to not
1337 be running graphics hacks on the (non-visible) X display. The common
1338 complaint that checking /proc/interrupts addresses is that the user is
1339 playing Quake on a non-X console, and the GL hacks are perceptibly slowing
1342 This is tricky for a number of reasons.
1344 * First, we must be sure to only do this when running on an X server that
1345 is on the local machine (because otherwise, we'd be reacting to the
1346 wrong keyboard.) The way we do this is by noting that the $DISPLAY is
1347 pointing to display 0 on the local machine. It *could* be that display
1348 1 is also on the local machine (e.g., two X servers, each on a different
1349 virtual-terminal) but it's also possible that screen 1 is an X terminal,
1350 using this machine as the host. So we can't take that chance.
1352 * Second, one can only access these interrupt numbers in a completely
1353 and utterly brain-damaged way. You would think that one would use an
1354 ioctl for this. But no. The ONLY way to get this information is to
1355 open the pseudo-file /proc/interrupts AS A FILE, and read the numbers
1356 out of it TEXTUALLY. Because this is Unix, and all the world's a file,
1357 and the only real data type is the short-line sequence of ASCII bytes.
1359 Now it's all well and good that the /proc/interrupts pseudo-file
1360 exists; that's a clever idea, and a useful API for things that are
1361 already textually oriented, like shell scripts, and users doing
1362 interactive debugging sessions. But to make a *C PROGRAM* open a file
1363 and parse the textual representation of integers out of it is just
1366 * Third, you can't just hold the file open, and fseek() back to the
1367 beginning to get updated data! If you do that, the data never changes.
1368 And I don't want to call open() every five seconds, because I don't want
1369 to risk going to disk for any inodes. It turns out that if you dup()
1370 it early, then each copy gets fresh data, so we can get around that in
1371 this way (but for how many releases, one might wonder?)
1373 * Fourth, the format of the output of the /proc/interrupts file is
1374 undocumented, and has changed several times already! In Linux 2.0.33,
1375 even on a multiprocessor machine, it looks like this:
1380 but in Linux 2.2 and 2.4 kernels with MP machines, it looks like this:
1383 0: 1671450 1672618 IO-APIC-edge timer
1384 1: 13037 13495 IO-APIC-edge keyboard
1386 and in Linux 2.6, it's gotten even goofier: now there are two lines
1387 labelled "i8042". One of them is the keyboard, and one of them is
1388 the PS/2 mouse -- and of course, you can't tell them apart, except
1389 by wiggling the mouse and noting which one changes:
1392 1: 32051 30864 IO-APIC-edge i8042
1393 12: 476577 479913 IO-APIC-edge i8042
1395 Joy! So how are we expected to parse that? Well, this code doesn't
1396 parse it: it saves the first line with the string "keyboard" (or
1397 "i8042") in it, and does a string-comparison to note when it has
1398 changed. If there are two "i8042" lines, we assume the first is
1399 the keyboard and the second is the mouse (doesn't matter which is
1400 which, really, as long as we don't compare them against each other.)
1402 Thanks to Nat Friedman <nat@nat.org> for figuring out most of this crap.
1404 Note that if you have a serial or USB mouse, or a USB keyboard, it won't
1405 detect it. That's because there's no way to tell the difference between a
1406 serial mouse and a general serial port, and all USB devices look the same
1407 from here. It would be somewhat unfortunate to have the screensaver turn
1408 off when the modem on COM1 burped, or when a USB disk was accessed.
1412 #ifdef HAVE_PROC_INTERRUPTS
1414 #define PROC_INTERRUPTS "/proc/interrupts"
1417 query_proc_interrupts_available (saver_info *si, const char **why)
1419 /* We can use /proc/interrupts if $DISPLAY points to :0, and if the
1420 "/proc/interrupts" file exists and is readable.
1425 if (!display_is_on_console_p (si))
1427 if (why) *why = "not on primary console";
1431 f = fopen (PROC_INTERRUPTS, "r");
1434 if (why) *why = "does not exist";
1444 proc_interrupts_activity_p (saver_info *si)
1446 static FILE *f0 = 0;
1449 static char last_kbd_line[255] = { 0, };
1450 static char last_ptr_line[255] = { 0, };
1451 char new_line[sizeof(last_kbd_line)];
1452 Bool checked_kbd = False, kbd_changed = False;
1453 Bool checked_ptr = False, ptr_changed = False;
1454 int i8042_count = 0;
1458 /* First time -- open the file. */
1459 f0 = fopen (PROC_INTERRUPTS, "r");
1463 sprintf(buf, "%s: error opening %s", blurb(), PROC_INTERRUPTS);
1468 # if defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
1469 /* Close this fd upon exec instead of inheriting / leaking it. */
1470 if (fcntl (fileno (f0), F_SETFD, FD_CLOEXEC) != 0)
1471 perror ("fcntl: CLOEXEC:");
1475 if (f0 == (FILE *) -1) /* means we got an error initializing. */
1478 fd = dup (fileno (f0));
1482 sprintf(buf, "%s: could not dup() the %s fd", blurb(), PROC_INTERRUPTS);
1487 f1 = fdopen (fd, "r");
1491 sprintf(buf, "%s: could not fdopen() the %s fd", blurb(),
1497 /* Actually, I'm unclear on why this fseek() is necessary, given the timing
1498 of the dup() above, but it is. */
1499 if (fseek (f1, 0, SEEK_SET) != 0)
1502 sprintf(buf, "%s: error rewinding %s", blurb(), PROC_INTERRUPTS);
1507 /* Now read through the pseudo-file until we find the "keyboard",
1508 "PS/2 mouse", or "i8042" lines. */
1510 while (fgets (new_line, sizeof(new_line)-1, f1))
1512 Bool i8042_p = !!strstr (new_line, "i8042");
1513 if (i8042_p) i8042_count++;
1515 if (strchr (new_line, ','))
1517 /* Ignore any line that has a comma on it: this is because
1520 12: 930935 XT-PIC usb-uhci, PS/2 Mouse
1522 is really bad news. It *looks* like we can note mouse
1523 activity from that line, but really, that interrupt gets
1524 fired any time any USB device has activity! So we have
1525 to ignore any shared IRQs.
1528 else if (!checked_kbd &&
1529 (strstr (new_line, "keyboard") ||
1530 (i8042_p && i8042_count == 1)))
1532 /* Assume the keyboard interrupt is the line that says "keyboard",
1533 or the *first* line that says "i8042".
1535 kbd_changed = (*last_kbd_line && !!strcmp (new_line, last_kbd_line));
1536 strcpy (last_kbd_line, new_line);
1539 else if (!checked_ptr &&
1540 (strstr (new_line, "PS/2 Mouse") ||
1541 (i8042_p && i8042_count == 2)))
1543 /* Assume the mouse interrupt is the line that says "PS/2 mouse",
1544 or the *second* line that says "i8042".
1546 ptr_changed = (*last_ptr_line && !!strcmp (new_line, last_ptr_line));
1547 strcpy (last_ptr_line, new_line);
1551 if (checked_kbd && checked_ptr)
1555 if (checked_kbd || checked_ptr)
1559 if (si->prefs.debug_p && (kbd_changed || ptr_changed))
1560 fprintf (stderr, "%s: /proc/interrupts activity: %s\n",
1562 ((kbd_changed && ptr_changed) ? "mouse and kbd" :
1563 kbd_changed ? "kbd" :
1564 ptr_changed ? "mouse" : "ERR"));
1566 return (kbd_changed || ptr_changed);
1570 /* If we got here, we didn't find either a "keyboard" or a "PS/2 Mouse"
1571 line in the file at all. */
1572 fprintf (stderr, "%s: no keyboard or mouse data in %s?\n",
1573 blurb(), PROC_INTERRUPTS);
1579 if (f0 && f0 != (FILE *) -1)
1586 #endif /* HAVE_PROC_INTERRUPTS */
1589 /* This timer goes off every few minutes, whether the user is idle or not,
1590 to try and clean up anything that has gone wrong.
1592 It calls disable_builtin_screensaver() so that if xset has been used,
1593 or some other program (like xlock) has messed with the XSetScreenSaver()
1594 settings, they will be set back to sensible values (if a server extension
1595 is in use, messing with xlock can cause xscreensaver to never get a wakeup
1596 event, and could cause monitor power-saving to occur, and all manner of
1599 If the screen is currently blanked, it raises the window, in case some
1600 other window has been mapped on top of it.
1602 If the screen is currently blanked, and there is no hack running, it
1603 clears the window, in case there is an error message printed on it (we
1604 don't want the error message to burn in.)
1608 watchdog_timer (XtPointer closure, XtIntervalId *id)
1610 saver_info *si = (saver_info *) closure;
1611 saver_preferences *p = &si->prefs;
1613 disable_builtin_screensaver (si, False);
1615 /* If the DPMS settings on the server have changed, change them back to
1616 what ~/.xscreensaver says they should be. */
1617 sync_server_dpms_settings (si->dpy,
1618 (p->dpms_enabled_p &&
1619 p->mode != DONT_BLANK),
1621 p->dpms_standby / 1000,
1622 p->dpms_suspend / 1000,
1626 if (si->screen_blanked_p)
1628 Bool running_p = screenhack_running_p (si);
1632 if (si->prefs.debug_p)
1633 fprintf (stderr, "%s: dialog box is up: not raising screen.\n",
1638 if (si->prefs.debug_p)
1639 fprintf (stderr, "%s: watchdog timer raising %sscreen.\n",
1640 blurb(), (running_p ? "" : "and clearing "));
1642 raise_window (si, True, True, running_p);
1645 if (screenhack_running_p (si) &&
1646 !monitor_powered_on_p (si))
1649 if (si->prefs.verbose_p)
1651 "%s: X says monitor has powered down; "
1652 "killing running hacks.\n", blurb());
1653 for (i = 0; i < si->nscreens; i++)
1654 kill_screenhack (&si->screens[i]);
1657 /* Re-schedule this timer. The watchdog timer defaults to a bit less
1658 than the hack cycle period, but is never longer than one hour.
1660 si->watchdog_id = 0;
1661 reset_watchdog_timer (si, True);
1667 reset_watchdog_timer (saver_info *si, Bool on_p)
1669 saver_preferences *p = &si->prefs;
1671 if (si->watchdog_id)
1673 XtRemoveTimeOut (si->watchdog_id);
1674 si->watchdog_id = 0;
1677 if (on_p && p->watchdog_timeout)
1679 si->watchdog_id = XtAppAddTimeOut (si->app, p->watchdog_timeout,
1680 watchdog_timer, (XtPointer) si);
1683 fprintf (stderr, "%s: restarting watchdog_timer (%ld, %ld)\n",
1684 blurb(), p->watchdog_timeout, si->watchdog_id);
1689 /* It's possible that a race condition could have led to the saver
1690 window being unexpectedly still mapped. This can happen like so:
1694 - that hack tries to grab a screen image (it does this by
1695 first unmapping the saver window, then remapping it.)
1696 - hack unmaps window
1698 - user becomes active
1699 - hack re-maps window (*)
1700 - driver kills subprocess
1701 - driver unmaps window (**)
1703 The race is that (*) might have been sent to the server before
1704 the client process was killed, but, due to scheduling randomness,
1705 might not have been received by the server until after (**).
1706 In other words, (*) and (**) might happen out of order, meaning
1707 the driver will unmap the window, and then after that, the
1708 recently-dead client will re-map it. This leaves the user
1709 locked out (it looks like a desktop, but it's not!)
1711 To avoid this: after un-blanking the screen, we launch a timer
1712 that wakes up once a second for ten seconds, and makes damned
1713 sure that the window is still unmapped.
1717 de_race_timer (XtPointer closure, XtIntervalId *id)
1719 saver_info *si = (saver_info *) closure;
1720 saver_preferences *p = &si->prefs;
1723 if (id == 0) /* if id is 0, this is the initialization call. */
1725 si->de_race_ticks = 10;
1727 fprintf (stderr, "%s: starting de-race timer (%d seconds.)\n",
1728 blurb(), si->de_race_ticks);
1733 XSync (si->dpy, False);
1734 for (i = 0; i < si->nscreens; i++)
1736 saver_screen_info *ssi = &si->screens[i];
1737 Window w = ssi->screensaver_window;
1738 XWindowAttributes xgwa;
1739 XGetWindowAttributes (si->dpy, w, &xgwa);
1740 if (xgwa.map_state != IsUnmapped)
1744 "%s: %d: client race! emergency unmap 0x%lx.\n",
1745 blurb(), i, (unsigned long) w);
1746 XUnmapWindow (si->dpy, w);
1748 else if (p->debug_p)
1749 fprintf (stderr, "%s: %d: (de-race of 0x%lx is cool.)\n",
1750 blurb(), i, (unsigned long) w);
1752 XSync (si->dpy, False);
1754 si->de_race_ticks--;
1757 if (id && *id == si->de_race_id)
1760 if (si->de_race_id) abort();
1762 if (si->de_race_ticks <= 0)
1766 fprintf (stderr, "%s: de-race completed.\n", blurb());
1770 si->de_race_id = XtAppAddTimeOut (si->app, secs * 1000,
1771 de_race_timer, closure);