/* windows.c --- turning the screen black; dealing with visuals, virtual roots.
- * xscreensaver, Copyright (c) 1991-1998 Jamie Zawinski <jwz@jwz.org>
+ * xscreensaver, Copyright (c) 1991-2001 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
#include <X11/Xatom.h>
#include <X11/Xos.h> /* for time() */
#include <signal.h> /* for the signal names */
+#include <time.h>
+#include <sys/time.h>
#ifdef HAVE_MIT_SAVER_EXTENSION
# include <X11/extensions/scrnsaver.h>
# include <X11/extensions/xf86vmode.h>
#endif /* HAVE_XF86VMODE */
+#ifdef HAVE_XINERAMA
+# include <X11/extensions/Xinerama.h>
+#endif /* HAVE_XINERAMA */
+
/* This file doesn't need the Xt headers, so stub these types out... */
#undef XtPointer
extern int kill (pid_t, int); /* signal() is in sys/signal.h... */
-Atom XA_VROOT, XA_XSETROOT_ID;
+Atom XA_VROOT, XA_XSETROOT_ID, XA_ESETROOT_PMAP_ID, XA_XROOTPMAP_ID;
Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_ID;
Atom XA_SCREENSAVER_STATUS;
extern saver_info *global_si_kludge; /* I hate C so much... */
+static void maybe_transfer_grabs (saver_screen_info *ssi,
+ Window old_w, Window new_w, int new_screen);
#define ALL_POINTER_EVENTS \
(ButtonPressMask | ButtonReleaseMask | EnterWindowMask | \
}
static int
-grab_kbd(saver_info *si, Window w)
+grab_kbd(saver_info *si, Window w, int screen_no)
{
saver_preferences *p = &si->prefs;
int status = XGrabKeyboard (si->dpy, w, True,
GrabModeSync, GrabModeAsync,
CurrentTime);
if (status == GrabSuccess)
- si->keyboard_grab_window = w;
+ {
+ si->keyboard_grab_window = w;
+ si->keyboard_grab_screen = screen_no;
+ }
if (p->verbose_p)
- fprintf(stderr, "%s: grabbing keyboard on 0x%x... %s.\n",
- blurb(), (unsigned long) w, grab_string(status));
+ fprintf(stderr, "%s: %d: grabbing keyboard on 0x%x... %s.\n",
+ blurb(), screen_no, (unsigned long) w, grab_string(status));
return status;
}
static int
-grab_mouse (saver_info *si, Window w, Cursor cursor)
+grab_mouse (saver_info *si, Window w, Cursor cursor, int screen_no)
{
saver_preferences *p = &si->prefs;
int status = XGrabPointer (si->dpy, w, True, ALL_POINTER_EVENTS,
GrabModeAsync, GrabModeAsync, w,
cursor, CurrentTime);
if (status == GrabSuccess)
- si->mouse_grab_window = w;
+ {
+ si->mouse_grab_window = w;
+ si->mouse_grab_screen = screen_no;
+ }
if (p->verbose_p)
- fprintf(stderr, "%s: grabbing mouse on 0x%x... %s.\n",
- blurb(), (unsigned long) w, grab_string(status));
+ fprintf(stderr, "%s: %d: grabbing mouse on 0x%x... %s.\n",
+ blurb(), screen_no, (unsigned long) w, grab_string(status));
return status;
}
saver_preferences *p = &si->prefs;
XUngrabKeyboard(si->dpy, CurrentTime);
if (p->verbose_p)
- fprintf(stderr, "%s: ungrabbing keyboard (was 0x%x).\n", blurb(),
- (unsigned long) si->keyboard_grab_window);
+ fprintf(stderr, "%s: %d: ungrabbing keyboard (was 0x%x).\n",
+ blurb(), si->keyboard_grab_screen,
+ (unsigned long) si->keyboard_grab_window);
si->keyboard_grab_window = 0;
}
saver_preferences *p = &si->prefs;
XUngrabPointer(si->dpy, CurrentTime);
if (p->verbose_p)
- fprintf(stderr, "%s: ungrabbing mouse (was 0x%x).\n", blurb(),
- (unsigned long) si->mouse_grab_window);
+ fprintf(stderr, "%s: %d: ungrabbing mouse (was 0x%x).\n",
+ blurb(), si->mouse_grab_screen,
+ (unsigned long) si->mouse_grab_window);
si->mouse_grab_window = 0;
}
static Bool
-grab_keyboard_and_mouse (saver_info *si, Window window, Cursor cursor)
+grab_keyboard_and_mouse (saver_info *si, Window window, Cursor cursor,
+ int screen_no)
{
- Status mstatus, kstatus;
- XSync (si->dpy, False);
+ Status mstatus = 0, kstatus = 0;
+ int i;
+ int retries = 4;
- kstatus = grab_kbd (si, window);
- if (kstatus != GrabSuccess)
- { /* try again in a second */
+ for (i = 0; i < retries; i++)
+ {
+ XSync (si->dpy, False);
+ kstatus = grab_kbd (si, window, screen_no);
+ if (kstatus == GrabSuccess)
+ break;
+
+ /* else, wait a second and try to grab again. */
sleep (1);
- kstatus = grab_kbd (si, window);
- if (kstatus != GrabSuccess)
- fprintf (stderr, "%s: couldn't grab keyboard! (%s)\n",
- blurb(), grab_string(kstatus));
}
- mstatus = grab_mouse (si, window, cursor);
- if (mstatus != GrabSuccess)
- { /* try again in a second */
+ if (kstatus != GrabSuccess)
+ fprintf (stderr, "%s: couldn't grab keyboard! (%s)\n",
+ blurb(), grab_string(kstatus));
+
+ for (i = 0; i < retries; i++)
+ {
+ XSync (si->dpy, False);
+ mstatus = grab_mouse (si, window, cursor, screen_no);
+ if (mstatus == GrabSuccess)
+ break;
+
+ /* else, wait a second and try to grab again. */
sleep (1);
- mstatus = grab_mouse (si, window, cursor);
- if (mstatus != GrabSuccess)
- fprintf (stderr, "%s: couldn't grab pointer! (%s)\n",
- blurb(), grab_string(mstatus));
}
+ if (mstatus != GrabSuccess)
+ fprintf (stderr, "%s: couldn't grab pointer! (%s)\n",
+ blurb(), grab_string(mstatus));
+
return (kstatus == GrabSuccess ||
mstatus == GrabSuccess);
}
int
-move_mouse_grab (saver_info *si, Window to, Cursor cursor)
+move_mouse_grab (saver_info *si, Window to, Cursor cursor, int to_screen_no)
{
Window old = si->mouse_grab_window;
if (old == 0)
- return grab_mouse (si, to, cursor);
+ return grab_mouse (si, to, cursor, to_screen_no);
else
{
saver_preferences *p = &si->prefs;
fprintf(stderr, "%s: grabbing server...\n", blurb());
ungrab_mouse (si);
- status = grab_mouse (si, to, cursor);
+ status = grab_mouse (si, to, cursor, to_screen_no);
if (status != GrabSuccess) /* Augh! */
{
sleep (1); /* Note dramatic evil of sleeping
with server grabbed. */
XSync (si->dpy, False);
- status = grab_mouse (si, to, cursor);
+ status = grab_mouse (si, to, cursor, to_screen_no);
}
if (status != GrabSuccess) /* Augh! Try to get the old one back... */
- grab_mouse (si, to, cursor);
+ grab_mouse (si, old, cursor, to_screen_no);
XUngrabServer (si->dpy);
XSync (si->dpy, False); /* ###### (danger over) */
}
+static Bool safe_XKillClient (Display *dpy, XID id);
+
static void
-kill_xsetroot_data (Display *dpy, Window window, Bool verbose_p)
+kill_xsetroot_data_1 (Display *dpy, Window window,
+ Atom prop, const char *atom_name,
+ Bool verbose_p)
{
Atom type;
int format;
delete of the _XSETROOT_ID property, and if it held a pixmap, then we
cause the RetainPermanent resources of the client which created it
(and which no longer exists) to be freed.
+
+ Update: it seems that Gnome and KDE do this same trick, but with the
+ properties "ESETROOT_PMAP_ID" and/or "_XROOTPMAP_ID" instead of
+ "_XSETROOT_ID". So, we'll kill those too.
*/
- if (XGetWindowProperty (dpy, window, XA_XSETROOT_ID, 0, 1,
+ if (XGetWindowProperty (dpy, window, prop, 0, 1,
True, AnyPropertyType, &type, &format, &nitems,
&bytesafter, (unsigned char **) &dataP)
== Success
nitems == 1 && bytesafter == 0)
{
if (verbose_p)
- fprintf (stderr, "%s: destroying xsetroot data (0x%lX).\n",
- blurb(), *dataP);
- XKillClient (dpy, *dataP);
+ fprintf (stderr, "%s: destroying %s data (0x%lX).\n",
+ blurb(), atom_name, *dataP);
+ safe_XKillClient (dpy, *dataP);
}
else
- fprintf (stderr, "%s: deleted unrecognised _XSETROOT_ID property: \n\
- %lu, %lu; type: %lu, format: %d, nitems: %lu, bytesafter %ld\n",
- blurb(), (unsigned long) dataP, (dataP ? *dataP : 0), type,
+ fprintf (stderr,
+ "%s: deleted unrecognised %s property: \n"
+ "\t%lu, %lu; type: %lu, format: %d, "
+ "nitems: %lu, bytesafter %ld\n",
+ blurb(), atom_name,
+ (unsigned long) dataP, (dataP ? *dataP : 0), type,
format, nitems, bytesafter);
}
}
-static void handle_signals (saver_info *si, Bool on_p);
+static void
+kill_xsetroot_data (Display *dpy, Window w, Bool verbose_p)
+{
+ kill_xsetroot_data_1 (dpy, w, XA_XSETROOT_ID, "_XSETROOT_ID", verbose_p);
+ kill_xsetroot_data_1 (dpy, w, XA_ESETROOT_PMAP_ID, "ESETROOT_PMAP_ID",
+ verbose_p);
+ kill_xsetroot_data_1 (dpy, w, XA_XROOTPMAP_ID, "_XROOTPMAP_ID", verbose_p);
+}
+
static void
save_real_vroot (saver_screen_info *ssi)
if (ssi->real_vroot)
{
- handle_signals (si, True);
remove_vroot_property (si->dpy, ssi->real_vroot);
XSync (dpy, False);
}
static Bool
-restore_real_vroot_2 (saver_screen_info *ssi)
+restore_real_vroot_1 (saver_screen_info *ssi)
{
saver_info *si = ssi->global;
saver_preferences *p = &si->prefs;
return False;
}
-static Bool
-restore_real_vroot_1 (saver_info *si)
+Bool
+restore_real_vroot (saver_info *si)
{
int i;
Bool did_any = False;
for (i = 0; i < si->nscreens; i++)
{
saver_screen_info *ssi = &si->screens[i];
- if (restore_real_vroot_2 (ssi))
+ if (restore_real_vroot_1 (ssi))
did_any = True;
}
return did_any;
}
-void
-restore_real_vroot (saver_info *si)
-{
- if (restore_real_vroot_1 (si))
- handle_signals (si, False);
-}
-
\f
/* Signal hackery to ensure that the vroot doesn't get left in an
inconsistent state
saver_info *si = global_si_kludge; /* I hate C so much... */
signal (sig, SIG_DFL);
- if (restore_real_vroot_1 (si))
+ if (restore_real_vroot (si))
fprintf (real_stderr, "\n%s: %s intercepted, vroot restored.\n",
blurb(), signal_name(sig));
kill (getpid (), sig);
}
static void
-catch_signal (saver_info *si, int sig, Bool on_p)
+catch_signal (saver_info *si, int sig, RETSIGTYPE (*handler) (int))
{
- if (! on_p)
- signal (sig, SIG_DFL);
- else
+# ifdef HAVE_SIGACTION
+
+ struct sigaction a;
+ a.sa_handler = handler;
+ sigemptyset (&a.sa_mask);
+ a.sa_flags = 0;
+
+ /* On Linux 2.4.9 (at least) we need to tell the kernel to not mask delivery
+ of this signal from inside its handler, or else when we execvp() the
+ process again, it starts up with SIGHUP blocked, meaning that killing
+ it with -HUP only works *once*. You'd think that execvp() would reset
+ all the signal masks, but it doesn't.
+ */
+# if defined(SA_NOMASK)
+ a.sa_flags |= SA_NOMASK;
+# elif defined(SA_NODEFER)
+ a.sa_flags |= SA_NODEFER;
+# endif
+
+ if (sigaction (sig, &a, 0) < 0)
+# else /* !HAVE_SIGACTION */
+ if (((long) signal (sig, handler)) == -1L)
+# endif /* !HAVE_SIGACTION */
{
- if (((long) signal (sig, restore_real_vroot_handler)) == -1L)
- {
- char buf [255];
- sprintf (buf, "%s: couldn't catch %s", blurb(), signal_name(sig));
- perror (buf);
- saver_exit (si, 1, 0);
- }
+ char buf [255];
+ sprintf (buf, "%s: couldn't catch %s", blurb(), signal_name(sig));
+ perror (buf);
+ saver_exit (si, 1, 0);
}
}
-static void
-handle_signals (saver_info *si, Bool on_p)
+static RETSIGTYPE saver_sighup_handler (int sig);
+
+void
+handle_signals (saver_info *si)
{
-#if 0
- if (on_p) fprintf (stderr, "handling signals\n");
- else fprintf (stderr, "unhandling signals\n");
+ catch_signal (si, SIGHUP, saver_sighup_handler);
+
+ catch_signal (si, SIGINT, restore_real_vroot_handler);
+ catch_signal (si, SIGQUIT, restore_real_vroot_handler);
+ catch_signal (si, SIGILL, restore_real_vroot_handler);
+ catch_signal (si, SIGTRAP, restore_real_vroot_handler);
+#ifdef SIGIOT
+ catch_signal (si, SIGIOT, restore_real_vroot_handler);
#endif
-
- catch_signal (si, SIGHUP, on_p);
- catch_signal (si, SIGINT, on_p);
- catch_signal (si, SIGQUIT, on_p);
- catch_signal (si, SIGILL, on_p);
- catch_signal (si, SIGTRAP, on_p);
- catch_signal (si, SIGIOT, on_p);
- catch_signal (si, SIGABRT, on_p);
+ catch_signal (si, SIGABRT, restore_real_vroot_handler);
#ifdef SIGEMT
- catch_signal (si, SIGEMT, on_p);
+ catch_signal (si, SIGEMT, restore_real_vroot_handler);
#endif
- catch_signal (si, SIGFPE, on_p);
- catch_signal (si, SIGBUS, on_p);
- catch_signal (si, SIGSEGV, on_p);
+ catch_signal (si, SIGFPE, restore_real_vroot_handler);
+ catch_signal (si, SIGBUS, restore_real_vroot_handler);
+ catch_signal (si, SIGSEGV, restore_real_vroot_handler);
#ifdef SIGSYS
- catch_signal (si, SIGSYS, on_p);
+ catch_signal (si, SIGSYS, restore_real_vroot_handler);
#endif
- catch_signal (si, SIGTERM, on_p);
+ catch_signal (si, SIGTERM, restore_real_vroot_handler);
#ifdef SIGXCPU
- catch_signal (si, SIGXCPU, on_p);
+ catch_signal (si, SIGXCPU, restore_real_vroot_handler);
#endif
#ifdef SIGXFSZ
- catch_signal (si, SIGXFSZ, on_p);
+ catch_signal (si, SIGXFSZ, restore_real_vroot_handler);
#endif
#ifdef SIGDANGER
- catch_signal (si, SIGDANGER, on_p);
+ catch_signal (si, SIGDANGER, restore_real_vroot_handler);
#endif
}
+
+static RETSIGTYPE
+saver_sighup_handler (int sig)
+{
+ saver_info *si = global_si_kludge; /* I hate C so much... */
+
+ /* Re-establish SIGHUP handler */
+ catch_signal (si, SIGHUP, saver_sighup_handler);
+
+ fprintf (stderr, "%s: %s received: restarting...\n",
+ blurb(), signal_name(sig));
+ unblank_screen (si);
+ kill_screenhack (si);
+ XSync (si->dpy, False);
+ restart_process (si); /* Does not return */
+ abort ();
+}
+
+
+
void
saver_exit (saver_info *si, int status, const char *dump_core_reason)
{
exiting = True;
- vrs = restore_real_vroot_1 (si);
+ vrs = restore_real_vroot (si);
emergency_kill_subproc (si);
+ shutdown_stderr (si);
- if (p->verbose_p) /* nobody cares about this */
- {
- if (vrs)
- fprintf (real_stderr, "%s: vroot restored, exiting.\n", blurb());
- else if (p->verbose_p)
- fprintf (real_stderr, "%s: no vroot to restore; exiting.\n", blurb());
- }
+ if (p->verbose_p && vrs)
+ fprintf (real_stderr, "%s: old vroot restored.\n", blurb());
fflush(real_stdout);
if (bugp)
fprintf(real_stderr,
"%s: see http://www.jwz.org/xscreensaver/bugs.html\n"
- "\t\tfor bug reporting information.\n\n",
+ "\t\t\tfor bug reporting information.\n\n",
blurb());
# if defined(HAVE_GETCWD)
XA_SCREENSAVER_STATUS,
XA_INTEGER, 32, PropModeReplace,
(unsigned char *) status, size);
+ free (status);
}
get_screen_viewport (saver_screen_info *ssi,
int *x_ret, int *y_ret,
int *w_ret, int *h_ret,
+ int target_x, int target_y,
Bool verbose_p)
{
int w = WidthOfScreen (ssi->screen);
#ifdef HAVE_XF86VMODE
saver_info *si = ssi->global;
- int screen_no = screen_number (ssi->screen);
- int op, event, error;
+ int event, error;
int dot;
XF86VidModeModeLine ml;
int x, y;
+ Bool xinerama_p;
+ Bool placement_only_p = (target_x != -1 && target_y != -1);
+
+#ifdef HAVE_XINERAMA
+ xinerama_p = (XineramaQueryExtension (si->dpy, &event, &error) &&
+ XineramaIsActive (si->dpy));
+#else /* !HAVE_XINERAMA */
+ /* Even if we don't have the client-side Xinerama lib, check to see if
+ the server supports Xinerama, so that we know to ignore the VidMode
+ extension -- otherwise a server crash could result. Yay. */
+ xinerama_p = XQueryExtension (si->dpy, "XINERAMA", &error, &event, &error);
+
+#endif /* !HAVE_XINERAMA */
- /* Check for Xinerama first, because the VidModeExtension is broken
- when Xinerama is present. Wheee!
- */
+#ifdef HAVE_XINERAMA
+ if (xinerama_p && placement_only_p)
+ {
+ int nscreens = 0;
+ XineramaScreenInfo *xsi = XineramaQueryScreens (si->dpy, &nscreens);
+ if (xsi)
+ {
+ /* Find the screen that contains the mouse. */
+ int which = -1;
+ int i;
+ for (i = 0; i < nscreens; i++)
+ {
+ if (target_x >= xsi[i].x_org &&
+ target_y >= xsi[i].y_org &&
+ target_x < xsi[i].x_org + xsi[i].width &&
+ target_y < xsi[i].y_org + xsi[i].height)
+ which = i;
+ if (verbose_p)
+ {
+ fprintf (stderr, "%s: %d: xinerama vp: %dx%d+%d+%d",
+ blurb(), i,
+ xsi[which].width, xsi[which].height,
+ xsi[i].x_org, xsi[i].y_org);
+ if (which == i)
+ fprintf (stderr, "; mouse at %d,%d",
+ target_x, target_y);
+ fprintf (stderr, ".\n");
+ }
+ }
+ if (which == -1) which = 0; /* didn't find it? Use the first. */
+ *x_ret = xsi[which].x_org;
+ *y_ret = xsi[which].y_org;
+ *w_ret = xsi[which].width;
+ *h_ret = xsi[which].height;
+ XFree (xsi);
+ return;
+ }
+ }
+#endif /* HAVE_XINERAMA */
- if (!XQueryExtension (si->dpy, "XINERAMA", &op, &event, &error) &&
+ if (!xinerama_p && /* Xinerama + VidMode = broken. */
XF86VidModeQueryExtension (si->dpy, &event, &error) &&
- XF86VidModeGetModeLine (si->dpy, screen_no, &dot, &ml) &&
- XF86VidModeGetViewPort (si->dpy, screen_no, &x, &y))
+ XF86VidModeGetModeLine (si->dpy, ssi->number, &dot, &ml) &&
+ XF86VidModeGetViewPort (si->dpy, ssi->number, &x, &y))
{
char msg[512];
*x_ret = x;
*h_ret = h;
return;
}
-
- sprintf (msg, "%s: vp is %dx%d+%d+%d",
- blurb(), *w_ret, *h_ret, *x_ret, *y_ret);
+ sprintf (msg, "%s: %d: vp is %dx%d+%d+%d",
+ blurb(), ssi->number,
+ *w_ret, *h_ret, *x_ret, *y_ret);
/* Apparently, though the server stores the X position in increments of
}
+static Bool error_handler_hit_p = False;
+
+static int
+ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error)
+{
+ error_handler_hit_p = True;
+ return 0;
+}
+
+
+/* Returns True if successful, False if an X error occurred.
+ We need this because other programs might have done things to
+ our window that will cause XChangeWindowAttributes() to fail:
+ if that happens, we give up, destroy the window, and re-create
+ it.
+ */
+static Bool
+safe_XChangeWindowAttributes (Display *dpy, Window window,
+ unsigned long mask,
+ XSetWindowAttributes *attrs)
+{
+ XErrorHandler old_handler;
+ XSync (dpy, False);
+ error_handler_hit_p = False;
+ old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
+
+ XChangeWindowAttributes (dpy, window, mask, attrs);
+
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ XSync (dpy, False);
+
+ return (!error_handler_hit_p);
+}
+
+
+/* This might not be necessary, but just in case. */
+static Bool
+safe_XConfigureWindow (Display *dpy, Window window,
+ unsigned long mask, XWindowChanges *changes)
+{
+ XErrorHandler old_handler;
+ XSync (dpy, False);
+ error_handler_hit_p = False;
+ old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
+
+ XConfigureWindow (dpy, window, mask, changes);
+
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ XSync (dpy, False);
+
+ return (!error_handler_hit_p);
+}
+
+/* This might not be necessary, but just in case. */
+static Bool
+safe_XDestroyWindow (Display *dpy, Window window)
+{
+ XErrorHandler old_handler;
+ XSync (dpy, False);
+ error_handler_hit_p = False;
+ old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
+
+ XDestroyWindow (dpy, window);
+
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ XSync (dpy, False);
+
+ return (!error_handler_hit_p);
+}
+
+
+static Bool
+safe_XKillClient (Display *dpy, XID id)
+{
+ XErrorHandler old_handler;
+ XSync (dpy, False);
+ error_handler_hit_p = False;
+ old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
+
+ XKillClient (dpy, id);
+
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ XSync (dpy, False);
+
+ return (!error_handler_hit_p);
+}
+
+
static void
initialize_screensaver_window_1 (saver_screen_info *ssi)
{
unsigned long attrmask;
int x, y, width, height;
static Bool printed_visual_info = False; /* only print the message once. */
+ Window horked_window = 0;
- get_screen_viewport (ssi, &x, &y, &width, &height,
+ get_screen_viewport (ssi, &x, &y, &width, &height, -1, -1,
(p->verbose_p && !si->screen_blanked_p));
black.red = black.green = black.blue = 0;
;
else if (ssi->current_visual == DefaultVisualOfScreen (ssi->screen))
{
- fprintf (stderr, "%s: using default visual ", blurb());
+ fprintf (stderr, "%s: %d: visual ", blurb(), ssi->number);
describe_visual (stderr, ssi->screen, ssi->current_visual,
install_cmap_p);
}
changes.height = height;
changes.border_width = 0;
- XConfigureWindow (si->dpy, ssi->screensaver_window,
- changesmask, &changes);
- XChangeWindowAttributes (si->dpy, ssi->screensaver_window,
- attrmask, &attrs);
+ if (! (safe_XConfigureWindow (si->dpy, ssi->screensaver_window,
+ changesmask, &changes) &&
+ safe_XChangeWindowAttributes (si->dpy, ssi->screensaver_window,
+ attrmask, &attrs)))
+ {
+ horked_window = ssi->screensaver_window;
+ ssi->screensaver_window = 0;
+ }
}
- else
+
+ if (!ssi->screensaver_window)
{
ssi->screensaver_window =
XCreateWindow (si->dpy, RootWindowOfScreen (ssi->screen),
ssi->current_visual, attrmask, &attrs);
reset_stderr (ssi);
+
+ if (horked_window)
+ {
+ fprintf (stderr,
+ "%s: someone horked our saver window (0x%lx)! Recreating it...\n",
+ blurb(), (unsigned long) horked_window);
+ maybe_transfer_grabs (ssi, horked_window, ssi->screensaver_window,
+ ssi->number);
+ safe_XDestroyWindow (si->dpy, horked_window);
+ horked_window = 0;
+ }
+
if (p->verbose_p)
- fprintf (stderr, "%s: saver window is 0x%lx.\n",
- blurb(), (unsigned long) ssi->screensaver_window);
+ fprintf (stderr, "%s: %d: saver window is 0x%lx.\n",
+ blurb(), ssi->number,
+ (unsigned long) ssi->screensaver_window);
}
store_saver_id (ssi); /* store window name and IDs */
}
}
+
+int
+mouse_screen (saver_info *si)
+{
+ saver_preferences *p = &si->prefs;
+
+ if (si->nscreens == 1)
+ return 0;
+ else
+ {
+ int i;
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ Window pointer_root, pointer_child;
+ int root_x, root_y, win_x, win_y;
+ unsigned int mask;
+ if (XQueryPointer (si->dpy,
+ RootWindowOfScreen (ssi->screen),
+ &pointer_root, &pointer_child,
+ &root_x, &root_y, &win_x, &win_y, &mask))
+ {
+ if (p->verbose_p)
+ fprintf (stderr, "%s: mouse is on screen %d\n",
+ blurb(), i, si->nscreens);
+ return i;
+ }
+ }
+
+ /* couldn't figure out where the mouse is? Oh well. */
+ return 0;
+ }
+}
+
+
Bool
blank_screen (saver_info *si)
{
int i;
Bool ok;
+ Window w;
+ int mscreen;
/* Note: we do our grabs on the root window, not on the screensaver window.
If we grabbed on the saver window, then the demo mode and lock dialog
boxes wouldn't get any events.
+
+ By "the root window", we mean "the root window that contains the mouse."
+ We use to always grab the mouse on screen 0, but that has the effect of
+ moving the mouse to screen 0 from whichever screen it was on, on
+ multi-head systems.
*/
- ok = grab_keyboard_and_mouse (si,
- /*si->screens[0].screensaver_window,*/
- RootWindowOfScreen(si->screens[0].screen),
- (si->demoing_p
- ? 0
- : si->screens[0].cursor));
+ mscreen = mouse_screen (si);
+ w = RootWindowOfScreen(si->screens[mscreen].screen);
+ ok = grab_keyboard_and_mouse (si, w,
+ (si->demoing_p ? 0 : si->screens[0].cursor),
+ mscreen);
if (si->using_mit_saver_extension || si->using_sgi_saver_extension)
}
+/* Transfer any grabs from the old window to the new.
+ Actually I think none of this is necessary, since we always
+ hold our grabs on the root window, but I wrote this before
+ re-discovering that...
+ */
+static void
+maybe_transfer_grabs (saver_screen_info *ssi,
+ Window old_w, Window new_w,
+ int new_screen_no)
+{
+ saver_info *si = ssi->global;
+
+ /* If the old window held our mouse grab, transfer the grab to the new
+ window. (Grab the server while so doing, to avoid a race condition.)
+ */
+ if (old_w == si->mouse_grab_window)
+ {
+ XGrabServer (si->dpy); /* ############ DANGER! */
+ ungrab_mouse (si);
+ grab_mouse (si, ssi->screensaver_window,
+ (si->demoing_p ? 0 : ssi->cursor),
+ new_screen_no);
+ XUngrabServer (si->dpy);
+ XSync (si->dpy, False); /* ###### (danger over) */
+ }
+
+ /* If the old window held our keyboard grab, transfer the grab to the new
+ window. (Grab the server while so doing, to avoid a race condition.)
+ */
+ if (old_w == si->keyboard_grab_window)
+ {
+ XGrabServer (si->dpy); /* ############ DANGER! */
+ ungrab_kbd(si);
+ grab_kbd(si, ssi->screensaver_window, ssi->number);
+ XUngrabServer (si->dpy);
+ XSync (si->dpy, False); /* ###### (danger over) */
+ }
+}
+
+
+
Bool
select_visual (saver_screen_info *ssi, const char *visual_name)
{
visual_name = "default";
install_cmap_p = False;
}
-#ifdef DAEMON_USE_GL
else if (!strcmp(visual_name, "gl") ||
!strcmp(visual_name, "Gl") ||
!strcmp(visual_name, "GL"))
{
- new_v = get_gl_visual (ssi->screen);
+ new_v = ssi->best_gl_visual;
if (!new_v && p->verbose_p)
fprintf (stderr, "%s: no GL visuals.\n", progname);
}
-#endif /* DAEMON_USE_GL */
if (!new_v)
new_v = get_visual (ssi->screen, visual_name, True, False);
if (p->verbose_p)
{
- fprintf (stderr, "%s: switching to visual ", blurb());
+ fprintf (stderr, "%s: %d: visual ", blurb(), ssi->number);
describe_visual (stderr, ssi->screen, new_v, install_cmap_p);
#if 0
- fprintf (stderr, "%s: from ", blurb());
+ fprintf (stderr, "%s: from ", blurb());
describe_visual (stderr, ssi->screen, ssi->current_visual,
was_installed_p);
#endif
store_vroot_property (si->dpy,
ssi->screensaver_window, ssi->screensaver_window);
+ /* Transfer any grabs from the old window to the new. */
+ maybe_transfer_grabs (ssi, old_w, ssi->screensaver_window, ssi->number);
- /* Transfer the grabs from the old window to the new.
- Actually I think none of this is necessary, since we always
- hold our grabs on the root window, but I wrote this before
- re-discovering that...
- */
-
-
- /* If we're destroying the window that holds our mouse grab,
- transfer the grab to the new window. (Grab the server while
- so doing, to avoid a race condition.)
- */
- if (old_w == si->mouse_grab_window)
- {
- XGrabServer (si->dpy); /* ############ DANGER! */
- ungrab_mouse (si);
- grab_mouse (si, ssi->screensaver_window,
- (si->demoing_p
- ? 0
- : ssi->cursor));
- XUngrabServer (si->dpy);
- XSync (si->dpy, False); /* ###### (danger over) */
- }
-
- /* If we're destroying the window that holds our keyboard grab,
- transfer the grab to the new window. (Grab the server while
- so doing, to avoid a race condition.)
- */
- if (old_w == si->keyboard_grab_window)
- {
- XGrabServer (si->dpy); /* ############ DANGER! */
- ungrab_kbd(si);
- grab_kbd(si, ssi->screensaver_window);
- XUngrabServer (si->dpy);
- XSync (si->dpy, False); /* ###### (danger over) */
- }
-
- /* Now we can destroy this window without horking our grabs. */
-
+ /* Now we can destroy the old window without horking our grabs. */
XDestroyWindow (si->dpy, old_w);
if (p->verbose_p)
- fprintf (stderr, "%s: destroyed old saver window 0x%lx.\n",
- blurb(), (unsigned long) old_w);
+ fprintf (stderr, "%s: %d: destroyed old saver window 0x%lx.\n",
+ blurb(), ssi->number, (unsigned long) old_w);
if (old_c &&
old_c != DefaultColormapOfScreen (ssi->screen) &&
projects / xscreensaver / blobdiff