-/* xscreensaver, Copyright (c) 1991-1993 Jamie Zawinski <jwz@lucid.com>
+/* windows.c --- turning the screen black; dealing with visuals, virtual roots.
+ * xscreensaver, Copyright (c) 1991-2008 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
* implied warranty.
*/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef VMS
+# include <unixlib.h> /* for getpid() */
+# include "vms-gtod.h" /* for gettimeofday() */
+#endif /* VMS */
+
+#ifndef VMS
+# include <pwd.h> /* for getpwuid() */
+#else /* VMS */
+# include "vms-pwd.h"
+#endif /* VMS */
+
+#ifdef HAVE_UNAME
+# include <sys/utsname.h> /* for uname() */
+#endif /* HAVE_UNAME */
+
#include <stdio.h>
+/* #include <X11/Xproto.h> / * for CARD32 */
#include <X11/Xlib.h>
-#include <X11/Xutil.h>
+#include <X11/Xutil.h> /* for XSetClassHint() */
#include <X11/Xatom.h>
-#include <X11/Xos.h>
-#include <X11/Xmu/SysUtil.h>
-
+#include <X11/Xos.h> /* for time() */
#include <signal.h> /* for the signal names */
+#include <time.h>
+#include <sys/time.h>
+
+/* You might think that to store an array of 32-bit quantities onto a
+ server-side property, you would pass an array of 32-bit data quantities
+ into XChangeProperty(). You would be wrong. You have to use an array
+ of longs, even if long is 64 bits (using 32 of each 64.)
+ */
+typedef long PROP32;
+
+#ifdef HAVE_MIT_SAVER_EXTENSION
+# include <X11/extensions/scrnsaver.h>
+#endif /* HAVE_MIT_SAVER_EXTENSION */
+
+#ifdef HAVE_XF86VMODE
+# 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
+#define XtAppContext void*
+#define XrmDatabase void*
+#define XtIntervalId void*
+#define XtPointer void*
+#define Widget void*
#include "xscreensaver.h"
+#include "visual.h"
+#include "fade.h"
-#if __STDC__
-extern int kill (pid_t, int); /* signal() is in sys/signal.h... */
-#endif /* __STDC__ */
-extern Bool lock_p, demo_mode_p;
+extern int kill (pid_t, int); /* signal() is in sys/signal.h... */
-Atom XA_VROOT, XA_XSETROOT_ID;
-Atom XA_SCREENSAVER_VERSION, XA_SCREENSAVER_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;
-#if __STDC__
-extern void describe_visual (FILE *, Display *, Visual *);
-#endif
-Window screensaver_window = 0;
-Cursor cursor;
-Colormap cmap, cmap2;
-Bool install_cmap_p;
-Bool fade_p, unfade_p;
-int fade_seconds, fade_ticks;
+extern saver_info *global_si_kludge; /* I hate C so much... */
-static unsigned long black_pixel;
-static Window real_vroot, real_vroot_value;
+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 | \
Button1MotionMask | Button2MotionMask | Button3MotionMask | \
Button4MotionMask | Button5MotionMask | ButtonMotionMask)
-/* I don't really understand Sync vs Async, but these seem to work... */
-#define grab_kbd(win) \
- XGrabKeyboard (dpy, (win), True, GrabModeSync, GrabModeAsync, CurrentTime)
-#define grab_mouse(win) \
- XGrabPointer (dpy, (win), True, ALL_POINTER_EVENTS, \
- GrabModeAsync, GrabModeAsync, None, cursor, CurrentTime)
-void
-grab_keyboard_and_mouse ()
+static const char *
+grab_string(int status)
{
- Status status;
- XSync (dpy, False);
+ switch (status)
+ {
+ case GrabSuccess: return "GrabSuccess";
+ case AlreadyGrabbed: return "AlreadyGrabbed";
+ case GrabInvalidTime: return "GrabInvalidTime";
+ case GrabNotViewable: return "GrabNotViewable";
+ case GrabFrozen: return "GrabFrozen";
+ default:
+ {
+ static char foo[255];
+ sprintf(foo, "unknown status: %d", status);
+ return foo;
+ }
+ }
+}
+
+static int
+grab_kbd(saver_info *si, Window w, int screen_no)
+{
+ saver_preferences *p = &si->prefs;
+ int status = XGrabKeyboard (si->dpy, w, True,
+ /* I don't really understand Sync vs Async,
+ but these seem to work... */
+ GrabModeSync, GrabModeAsync,
+ CurrentTime);
+ if (status == GrabSuccess)
+ {
+ si->keyboard_grab_window = w;
+ si->keyboard_grab_screen = screen_no;
+ }
+
+ if (p->verbose_p)
+ fprintf(stderr, "%s: %d: grabbing keyboard on 0x%lx... %s.\n",
+ blurb(), screen_no, (unsigned long) w, grab_string(status));
+ return status;
+}
+
+
+static int
+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_screen = screen_no;
+ }
+
+ if (p->verbose_p)
+ fprintf(stderr, "%s: %d: grabbing mouse on 0x%lx... %s.\n",
+ blurb(), screen_no, (unsigned long) w, grab_string(status));
+ return status;
+}
+
+
+static void
+ungrab_kbd(saver_info *si)
+{
+ saver_preferences *p = &si->prefs;
+ XUngrabKeyboard(si->dpy, CurrentTime);
+ if (p->verbose_p)
+ fprintf(stderr, "%s: %d: ungrabbing keyboard (was 0x%lx).\n",
+ blurb(), si->keyboard_grab_screen,
+ (unsigned long) si->keyboard_grab_window);
+ si->keyboard_grab_window = 0;
+}
+
+
+static void
+ungrab_mouse(saver_info *si)
+{
+ saver_preferences *p = &si->prefs;
+ XUngrabPointer(si->dpy, CurrentTime);
+ if (p->verbose_p)
+ fprintf(stderr, "%s: %d: ungrabbing mouse (was 0x%lx).\n",
+ blurb(), si->mouse_grab_screen,
+ (unsigned long) si->mouse_grab_window);
+ si->mouse_grab_window = 0;
+}
+
+
+/* Apparently there is this program called "rdesktop" which is a windows
+ terminal server client for Unix. It would seem that this program holds
+ the keyboard GRABBED the whole time it has focus! This is, of course,
+ completely idiotic: the whole point of grabbing is to get events when
+ you do *not* have focus, so grabbing *only when* you have focus is
+ completely redundant -- unless your goal is to make xscreensaver not
+ able to ever lock the screen when your program is running.
+
+ If xscreensaver blanks while rdesktop still has a keyboard grab, then
+ when we try to prompt for the password, we won't get the characters:
+ they'll be typed into rdesktop.
+
+ Perhaps rdesktop will release its keyboard grab if it loses focus?
+ What the hell, let's give it a try. If we fail to grab the keyboard
+ four times in a row, we forcibly set focus to "None" and try four
+ more times. (We don't touch focus unless we're already having a hard
+ time getting a grab.)
+ */
+static void
+nuke_focus (saver_info *si, int screen_no)
+{
+ saver_preferences *p = &si->prefs;
+ Window focus = 0;
+ int rev = 0;
+
+ XGetInputFocus (si->dpy, &focus, &rev);
+
+ if (p->verbose_p)
+ {
+ char w[255], r[255];
+
+ if (focus == PointerRoot) strcpy (w, "PointerRoot");
+ else if (focus == None) strcpy (w, "None");
+ else sprintf (w, "0x%lx", (unsigned long) focus);
+
+ if (rev == RevertToParent) strcpy (r, "RevertToParent");
+ else if (rev == RevertToPointerRoot) strcpy (r, "RevertToPointerRoot");
+ else if (rev == RevertToNone) strcpy (r, "RevertToNone");
+ else sprintf (r, "0x%x", rev);
+
+ fprintf (stderr, "%s: %d: removing focus from %s / %s.\n",
+ blurb(), screen_no, w, r);
+ }
+
+ XSetInputFocus (si->dpy, None, RevertToNone, CurrentTime);
+ XSync (si->dpy, False);
+}
+
+
+static Bool
+grab_keyboard_and_mouse (saver_info *si, Window window, Cursor cursor,
+ int screen_no)
+{
+ Status mstatus = 0, kstatus = 0;
+ int i;
+ int retries = 4;
+ Bool focus_fuckus = False;
+
+ AGAIN:
- if (demo_mode_p) return;
+ for (i = 0; i < retries; i++)
+ {
+ XSync (si->dpy, False);
+ kstatus = grab_kbd (si, window, screen_no);
+ if (kstatus == GrabSuccess)
+ break;
- status = grab_kbd (screensaver_window);
- if (status != GrabSuccess)
- { /* try again in a second */
+ /* else, wait a second and try to grab again. */
sleep (1);
- status = grab_kbd (screensaver_window);
- if (status != GrabSuccess)
- fprintf (stderr, "%s: %scouldn't grab keyboard! (%d)\n",
- progname, (verbose_p ? "## " : ""), status);
- }
- status = grab_mouse (screensaver_window);
- if (status != GrabSuccess)
- { /* try again in a second */
+ }
+
+ if (kstatus != GrabSuccess)
+ {
+ fprintf (stderr, "%s: couldn't grab keyboard! (%s)\n",
+ blurb(), grab_string(kstatus));
+
+ if (! focus_fuckus)
+ {
+ focus_fuckus = True;
+ nuke_focus (si, screen_no);
+ goto AGAIN;
+ }
+ }
+
+ 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);
- status = grab_mouse (screensaver_window);
- if (status != GrabSuccess)
- fprintf (stderr, "%s: %scouldn't grab pointer! (%d)\n",
- progname, (verbose_p ? "## " : ""), status);
}
+
+ if (mstatus != GrabSuccess)
+ fprintf (stderr, "%s: couldn't grab pointer! (%s)\n",
+ blurb(), grab_string(mstatus));
+
+
+ /* When should we allow blanking to proceed? The current theory
+ is that a keyboard grab is manditory; a mouse grab is optional.
+
+ - If we don't have a keyboard grab, then we won't be able to
+ read a password to unlock, so the kbd grab is manditory.
+ (We can't conditionalize this on locked_p, because someone
+ might run "xscreensaver-command -lock" at any time.)
+
+ - If we don't have a mouse grab, then we might not see mouse
+ clicks as a signal to unblank -- but we will still see kbd
+ activity, so that's not a disaster.
+ */
+
+ if (kstatus != GrabSuccess) /* Do not blank without a kbd grab. */
+ return False;
+
+ return True; /* Grab is good, go ahead and blank. */
}
-void
-ungrab_keyboard_and_mouse ()
+static void
+ungrab_keyboard_and_mouse (saver_info *si)
{
- XUngrabPointer (dpy, CurrentTime);
- XUngrabKeyboard (dpy, CurrentTime);
+ ungrab_mouse (si);
+ ungrab_kbd (si);
}
-void
-ensure_no_screensaver_running ()
+int
+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, to_screen_no);
+ else
+ {
+ saver_preferences *p = &si->prefs;
+ int status;
+
+ XSync (si->dpy, False);
+ XGrabServer (si->dpy); /* ############ DANGER! */
+ XSync (si->dpy, False);
+
+ if (p->verbose_p)
+ fprintf(stderr, "%s: grabbing server...\n", blurb());
+
+ ungrab_mouse (si);
+ 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, to_screen_no);
+ }
+
+ if (status != GrabSuccess) /* Augh! Try to get the old one back... */
+ grab_mouse (si, old, cursor, to_screen_no);
+
+ XUngrabServer (si->dpy);
+ XSync (si->dpy, False); /* ###### (danger over) */
+
+ if (p->verbose_p)
+ fprintf(stderr, "%s: ungrabbing server.\n", blurb());
+
+ return status;
+ }
+}
+
+
+/* Prints an error message to stderr and returns True if there is another
+ xscreensaver running already. Silently returns False otherwise. */
+Bool
+ensure_no_screensaver_running (Display *dpy, Screen *screen)
+{
+ Bool status = 0;
int i;
Window root = RootWindowOfScreen (screen);
Window root2, parent, *kids;
unsigned int nkids;
- int (*old_handler) ();
-
- old_handler = XSetErrorHandler (BadWindow_ehandler);
+ XErrorHandler old_handler = XSetErrorHandler (BadWindow_ehandler);
if (! XQueryTree (dpy, root, &root2, &parent, &kids, &nkids))
abort ();
Atom type;
int format;
unsigned long nitems, bytesafter;
- char *version;
+ unsigned char *version;
if (XGetWindowProperty (dpy, kids[i], XA_SCREENSAVER_VERSION, 0, 1,
False, XA_STRING, &type, &format, &nitems,
- &bytesafter, (unsigned char **) &version)
+ &bytesafter, &version)
== Success
&& type != None)
{
- char *id;
+ unsigned char *id;
if (!XGetWindowProperty (dpy, kids[i], XA_SCREENSAVER_ID, 0, 512,
False, XA_STRING, &type, &format, &nitems,
- &bytesafter, (unsigned char **) &id)
+ &bytesafter, &id)
== Success
|| type == None)
- id = "???";
+ id = (unsigned char *) "???";
fprintf (stderr,
- "%s: %salready running on display %s (window 0x%x)\n from process %s.\n",
- progname, (verbose_p ? "## " : ""), DisplayString (dpy),
- (int) kids [i], id);
- exit (1);
+ "%s: already running on display %s (window 0x%x)\n from process %s.\n",
+ blurb(), DisplayString (dpy), (int) kids [i],
+ (char *) id);
+ status = True;
}
}
if (kids) XFree ((char *) kids);
XSync (dpy, False);
XSetErrorHandler (old_handler);
+ return status;
}
-void
-disable_builtin_screensaver ()
-{
- int timeout, interval, prefer_blank, allow_exp;
- XForceScreenSaver (dpy, ScreenSaverReset);
- XGetScreenSaver (dpy, &timeout, &interval, &prefer_blank, &allow_exp);
- if (timeout != 0)
- {
- XSetScreenSaver (dpy, 0, interval, prefer_blank, allow_exp);
- printf ("%s%sisabling server builtin screensaver.\n\
- You can re-enable it with \"xset s on\".\n",
- (verbose_p ? "" : progname), (verbose_p ? "\n\tD" : ": d"));
- }
-}
-
\f
/* Virtual-root hackery */
#endif
static void
-store_vroot_property (win, value)
- Window win, value;
+store_vroot_property (Display *dpy, Window win, Window value)
{
#if 0
- printf ("%s: storing XA_VROOT = 0x%x (%s) = 0x%x (%s)\n", progname,
- win,
- (win == screensaver_window ? "ScreenSaver" :
- (win == real_vroot ? "VRoot" :
- (win == real_vroot_value ? "Vroot_value" : "???"))),
- value,
- (value == screensaver_window ? "ScreenSaver" :
- (value == real_vroot ? "VRoot" :
- (value == real_vroot_value ? "Vroot_value" : "???"))));
+ if (p->verbose_p)
+ fprintf (stderr,
+ "%s: storing XA_VROOT = 0x%x (%s) = 0x%x (%s)\n", blurb(),
+ win,
+ (win == screensaver_window ? "ScreenSaver" :
+ (win == real_vroot ? "VRoot" :
+ (win == real_vroot_value ? "Vroot_value" : "???"))),
+ value,
+ (value == screensaver_window ? "ScreenSaver" :
+ (value == real_vroot ? "VRoot" :
+ (value == real_vroot_value ? "Vroot_value" : "???"))));
#endif
XChangeProperty (dpy, win, XA_VROOT, XA_WINDOW, 32, PropModeReplace,
(unsigned char *) &value, 1);
}
static void
-remove_vroot_property (win)
- Window win;
+remove_vroot_property (Display *dpy, Window win)
{
#if 0
- printf ("%s: removing XA_VROOT from 0x%x (%s)\n", progname, win,
- (win == screensaver_window ? "ScreenSaver" :
- (win == real_vroot ? "VRoot" :
- (win == real_vroot_value ? "Vroot_value" : "???"))));
+ if (p->verbose_p)
+ fprintf (stderr, "%s: removing XA_VROOT from 0x%x (%s)\n", blurb(), win,
+ (win == screensaver_window ? "ScreenSaver" :
+ (win == real_vroot ? "VRoot" :
+ (win == real_vroot_value ? "Vroot_value" : "???"))));
#endif
XDeleteProperty (dpy, win, XA_VROOT);
}
+static Bool safe_XKillClient (Display *dpy, XID id);
+
+#ifdef HAVE_XF86VMODE
+static Bool safe_XF86VidModeGetViewPort (Display *, int, int *, int *);
+#endif /* HAVE_XF86VMODE */
+
+
static void
-kill_xsetroot_data ()
+kill_xsetroot_data_1 (Display *dpy, Window window,
+ Atom prop, const char *atom_name,
+ Bool verbose_p)
{
Atom type;
int format;
unsigned long nitems, bytesafter;
- Pixmap *dataP = 0;
+ unsigned char *dataP = 0;
/* If the user has been using xv or xsetroot as a screensaver (to display
an image on the screensaver window, as a kind of slideshow) then the
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, screensaver_window, XA_XSETROOT_ID, 0, 1,
+ if (XGetWindowProperty (dpy, window, prop, 0, 1,
True, AnyPropertyType, &type, &format, &nitems,
- &bytesafter, (unsigned char **) &dataP)
+ &bytesafter, &dataP)
== Success
&& type != None)
{
- if (dataP && *dataP && type == XA_PIXMAP && format == 32 &&
+ Pixmap *pixP = (Pixmap *) dataP;
+ if (pixP && *pixP && type == XA_PIXMAP && format == 32 &&
nitems == 1 && bytesafter == 0)
{
if (verbose_p)
- printf ("%s: destroying xsetroot data (0x%X).\n",
- progname, *dataP);
- XKillClient (dpy, *dataP);
+ fprintf (stderr, "%s: destroying %s data (0x%lX).\n",
+ blurb(), atom_name, *pixP);
+ safe_XKillClient (dpy, *pixP);
}
else
- fprintf (stderr, "%s: %sdeleted unrecognised _XSETROOT_ID property: \n\
- %d, %d; type: %d, format: %d, nitems: %d, bytesafter %d\n",
- progname, (verbose_p ? "## " : ""),
- 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) pixP, (pixP ? *pixP : 0), type,
format, nitems, bytesafter);
}
}
-static void handle_signals P((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 ()
+save_real_vroot (saver_screen_info *ssi)
{
+ saver_info *si = ssi->global;
+ Display *dpy = si->dpy;
+ Screen *screen = ssi->screen;
int i;
Window root = RootWindowOfScreen (screen);
Window root2, parent, *kids;
unsigned int nkids;
+ XErrorHandler old_handler;
- real_vroot = 0;
- real_vroot_value = 0;
+ /* It's possible that a window might be deleted between our call to
+ XQueryTree() and our call to XGetWindowProperty(). Don't die if
+ that happens (but just ignore that window, it's not the one we're
+ interested in anyway.)
+ */
+ XSync (dpy, False);
+ old_handler = XSetErrorHandler (BadWindow_ehandler);
+ XSync (dpy, False);
+
+ ssi->real_vroot = 0;
+ ssi->real_vroot_value = 0;
if (! XQueryTree (dpy, root, &root2, &parent, &kids, &nkids))
abort ();
if (root != root2)
Atom type;
int format;
unsigned long nitems, bytesafter;
- Window *vrootP = 0;
+ unsigned char *dataP = 0;
+ Window *vrootP;
+ int j;
+
+ /* Skip this window if it is the xscreensaver window of any other
+ screen (this can happen in the Xinerama case.)
+ */
+ for (j = 0; j < si->nscreens; j++)
+ {
+ saver_screen_info *ssi2 = &si->screens[j];
+ if (kids[i] == ssi2->screensaver_window)
+ goto SKIP;
+ }
if (XGetWindowProperty (dpy, kids[i], XA_VROOT, 0, 1, False, XA_WINDOW,
&type, &format, &nitems, &bytesafter,
- (unsigned char **) &vrootP)
+ &dataP)
!= Success)
continue;
- if (! vrootP)
+ if (! dataP)
continue;
- if (real_vroot)
+
+ vrootP = (Window *) dataP;
+ if (ssi->real_vroot)
{
- if (*vrootP == screensaver_window) abort ();
+ if (*vrootP == ssi->screensaver_window) abort ();
fprintf (stderr,
- "%s: %smore than one virtual root window found (0x%x and 0x%x).\n",
- progname, (verbose_p ? "## " : ""),
- (int) real_vroot, (int) kids [i]);
+ "%s: more than one virtual root window found (0x%x and 0x%x).\n",
+ blurb(), (int) ssi->real_vroot, (int) kids [i]);
exit (1);
}
- real_vroot = kids [i];
- real_vroot_value = *vrootP;
+ ssi->real_vroot = kids [i];
+ ssi->real_vroot_value = *vrootP;
+ SKIP:
+ ;
}
- if (real_vroot)
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ XSync (dpy, False);
+
+ if (ssi->real_vroot)
{
- handle_signals (True);
- remove_vroot_property (real_vroot);
+ remove_vroot_property (si->dpy, ssi->real_vroot);
XSync (dpy, False);
}
XFree ((char *) kids);
}
+
static Bool
-restore_real_vroot_1 ()
+restore_real_vroot_1 (saver_screen_info *ssi)
{
- if (verbose_p && real_vroot)
- printf ("%s: restoring __SWM_VROOT property on the real vroot (0x%x).\n",
- progname, real_vroot);
- remove_vroot_property (screensaver_window);
- if (real_vroot)
+ saver_info *si = ssi->global;
+ saver_preferences *p = &si->prefs;
+ if (p->verbose_p && ssi->real_vroot)
+ fprintf (stderr,
+ "%s: restoring __SWM_VROOT property on the real vroot (0x%lx).\n",
+ blurb(), (unsigned long) ssi->real_vroot);
+ remove_vroot_property (si->dpy, ssi->screensaver_window);
+ if (ssi->real_vroot)
{
- store_vroot_property (real_vroot, real_vroot_value);
- real_vroot = 0;
- real_vroot_value = 0;
+ store_vroot_property (si->dpy, ssi->real_vroot, ssi->real_vroot_value);
+ ssi->real_vroot = 0;
+ ssi->real_vroot_value = 0;
/* make sure the property change gets there before this process
terminates! We might be doing this because we have intercepted
SIGTERM or something. */
- XSync (dpy, False);
+ XSync (si->dpy, False);
return True;
}
return False;
}
-void
-restore_real_vroot ()
+Bool
+restore_real_vroot (saver_info *si)
{
- if (restore_real_vroot_1 ())
- handle_signals (False);
+ int i;
+ Bool did_any = False;
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ if (restore_real_vroot_1 (ssi))
+ did_any = True;
+ }
+ return did_any;
}
\f
inconsistent state
*/
-static const char *sig_names [255] = { 0 };
+const char *
+signal_name(int signal)
+{
+ switch (signal) {
+ case SIGHUP: return "SIGHUP";
+ case SIGINT: return "SIGINT";
+ case SIGQUIT: return "SIGQUIT";
+ case SIGILL: return "SIGILL";
+ case SIGTRAP: return "SIGTRAP";
+#ifdef SIGABRT
+ case SIGABRT: return "SIGABRT";
+#endif
+ case SIGFPE: return "SIGFPE";
+ case SIGKILL: return "SIGKILL";
+ case SIGBUS: return "SIGBUS";
+ case SIGSEGV: return "SIGSEGV";
+ case SIGPIPE: return "SIGPIPE";
+ case SIGALRM: return "SIGALRM";
+ case SIGTERM: return "SIGTERM";
+#ifdef SIGSTOP
+ case SIGSTOP: return "SIGSTOP";
+#endif
+#ifdef SIGCONT
+ case SIGCONT: return "SIGCONT";
+#endif
+#ifdef SIGUSR1
+ case SIGUSR1: return "SIGUSR1";
+#endif
+#ifdef SIGUSR2
+ case SIGUSR2: return "SIGUSR2";
+#endif
+#ifdef SIGEMT
+ case SIGEMT: return "SIGEMT";
+#endif
+#ifdef SIGSYS
+ case SIGSYS: return "SIGSYS";
+#endif
+#ifdef SIGCHLD
+ case SIGCHLD: return "SIGCHLD";
+#endif
+#ifdef SIGPWR
+ case SIGPWR: return "SIGPWR";
+#endif
+#ifdef SIGWINCH
+ case SIGWINCH: return "SIGWINCH";
+#endif
+#ifdef SIGURG
+ case SIGURG: return "SIGURG";
+#endif
+#ifdef SIGIO
+ case SIGIO: return "SIGIO";
+#endif
+#ifdef SIGVTALRM
+ case SIGVTALRM: return "SIGVTALRM";
+#endif
+#ifdef SIGXCPU
+ case SIGXCPU: return "SIGXCPU";
+#endif
+#ifdef SIGXFSZ
+ case SIGXFSZ: return "SIGXFSZ";
+#endif
+#ifdef SIGDANGER
+ case SIGDANGER: return "SIGDANGER";
+#endif
+ default:
+ {
+ static char buf[50];
+ sprintf(buf, "signal %d\n", signal);
+ return buf;
+ }
+ }
+}
-static void
-restore_real_vroot_handler (sig)
- int sig;
+
+
+static RETSIGTYPE
+restore_real_vroot_handler (int sig)
{
+ saver_info *si = global_si_kludge; /* I hate C so much... */
+
signal (sig, SIG_DFL);
- if (restore_real_vroot_1 ())
- fprintf (stderr, "\n%s: %s%s (%d) intercepted, vroot restored.\n",
- progname, (verbose_p ? "## " : ""),
- ((sig < sizeof(sig_names) && sig >= 0 && sig_names [sig])
- ? sig_names [sig] : "unknown signal"),
- sig);
+ 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 (sig, signame, on_p)
- int sig;
- char *signame;
- 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 */
{
- sig_names [sig] = signame;
- if (((int) signal (sig, restore_real_vroot_handler)) == -1)
- {
- char buf [255];
- sprintf (buf, "%s: %scouldn't catch %s (%d)", progname,
- (verbose_p ? "## " : ""), signame, sig);
- perror (buf);
- restore_real_vroot ();
- exit (1);
- }
+ 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 (on_p)
- Bool on_p;
+static RETSIGTYPE saver_sighup_handler (int sig);
+
+void
+handle_signals (saver_info *si)
{
-#if 0
- if (on_p) printf ("handling signals\n");
- else printf ("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 (SIGHUP, "SIGHUP", on_p);
- catch_signal (SIGINT, "SIGINT", on_p);
- catch_signal (SIGQUIT, "SIGQUIT", on_p);
- catch_signal (SIGILL, "SIGILL", on_p);
- catch_signal (SIGTRAP, "SIGTRAP", on_p);
- catch_signal (SIGIOT, "SIGIOT", on_p);
- catch_signal (SIGABRT, "SIGABRT", on_p);
+ catch_signal (si, SIGABRT, restore_real_vroot_handler);
#ifdef SIGEMT
- catch_signal (SIGEMT, "SIGEMT", on_p);
+ catch_signal (si, SIGEMT, restore_real_vroot_handler);
#endif
- catch_signal (SIGFPE, "SIGFPE", on_p);
- catch_signal (SIGBUS, "SIGBUS", on_p);
- catch_signal (SIGSEGV, "SIGSEGV", on_p);
- catch_signal (SIGSYS, "SIGSYS", on_p);
- catch_signal (SIGTERM, "SIGTERM", 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, restore_real_vroot_handler);
+#endif
+ catch_signal (si, SIGTERM, restore_real_vroot_handler);
#ifdef SIGXCPU
- catch_signal (SIGXCPU, "SIGXCPU", on_p);
+ catch_signal (si, SIGXCPU, restore_real_vroot_handler);
#endif
#ifdef SIGXFSZ
- catch_signal (SIGXFSZ, "SIGXFSZ", on_p);
+ catch_signal (si, SIGXFSZ, restore_real_vroot_handler);
#endif
#ifdef SIGDANGER
- catch_signal (SIGDANGER, "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));
+
+ if (si->screen_blanked_p)
+ {
+ 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)
+{
+ saver_preferences *p = &si->prefs;
+ static Bool exiting = False;
+ Bool bugp;
+ Bool vrs;
+
+ if (exiting)
+ exit(status);
+
+ exiting = True;
+
+ vrs = restore_real_vroot (si);
+ emergency_kill_subproc (si);
+ shutdown_stderr (si);
+
+ if (p->verbose_p && vrs)
+ fprintf (real_stderr, "%s: old vroot restored.\n", blurb());
+
+ fflush(real_stdout);
+
+#ifdef VMS /* on VMS, 1 is the "normal" exit code instead of 0. */
+ if (status == 0) status = 1;
+ else if (status == 1) status = -1;
#endif
+
+ bugp = !!dump_core_reason;
+
+ if (si->prefs.debug_p && !dump_core_reason)
+ dump_core_reason = "because of -debug";
+
+ if (dump_core_reason)
+ {
+ /* Note that the Linux man page for setuid() says If uid is
+ different from the old effective uid, the process will be
+ forbidden from leaving core dumps.
+ */
+ char cwd[4096]; /* should really be PATH_MAX, but who cares. */
+ cwd[0] = 0;
+ fprintf(real_stderr, "%s: dumping core (%s)\n", blurb(),
+ dump_core_reason);
+
+ if (bugp)
+ fprintf(real_stderr,
+ "%s: see http://www.jwz.org/xscreensaver/bugs.html\n"
+ "\t\t\tfor bug reporting information.\n\n",
+ blurb());
+
+# if defined(HAVE_GETCWD)
+ if (!getcwd (cwd, sizeof(cwd)))
+# elif defined(HAVE_GETWD)
+ if (!getwd (cwd))
+# endif
+ strcpy(cwd, "unknown.");
+
+ fprintf (real_stderr, "%s: current directory is %s\n", blurb(), cwd);
+ describe_uids (si, real_stderr);
+
+ /* Do this to drop a core file, so that we can get a stack trace. */
+ abort();
+ }
+
+ exit (status);
}
\f
/* Managing the actual screensaver window */
+Bool
+window_exists_p (Display *dpy, Window window)
+{
+ XErrorHandler old_handler;
+ XWindowAttributes xgwa;
+ xgwa.screen = 0;
+ old_handler = XSetErrorHandler (BadWindow_ehandler);
+ XGetWindowAttributes (dpy, window, &xgwa);
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ return (xgwa.screen != 0);
+}
+
+static void
+store_saver_id (saver_screen_info *ssi)
+{
+ XClassHint class_hints;
+ saver_info *si = ssi->global;
+ unsigned long pid = (unsigned long) getpid ();
+ char buf[20];
+ struct passwd *p = getpwuid (getuid ());
+ const char *name, *host;
+ char *id;
+
+ /* First store the name and class on the window.
+ */
+ class_hints.res_name = progname;
+ class_hints.res_class = progclass;
+ XSetClassHint (si->dpy, ssi->screensaver_window, &class_hints);
+ XStoreName (si->dpy, ssi->screensaver_window, "screensaver");
+
+ /* Then store the xscreensaver version number.
+ */
+ XChangeProperty (si->dpy, ssi->screensaver_window,
+ XA_SCREENSAVER_VERSION,
+ XA_STRING, 8, PropModeReplace,
+ (unsigned char *) si->version,
+ strlen (si->version));
+
+ /* Now store the XSCREENSAVER_ID property, that says what user and host
+ xscreensaver is running as.
+ */
+
+ if (p && p->pw_name && *p->pw_name)
+ name = p->pw_name;
+ else if (p)
+ {
+ sprintf (buf, "%lu", (unsigned long) p->pw_uid);
+ name = buf;
+ }
+ else
+ name = "???";
+
+# if defined(HAVE_UNAME)
+ {
+ struct utsname uts;
+ if (uname (&uts) < 0)
+ host = "???";
+ else
+ host = uts.nodename;
+ }
+# elif defined(VMS)
+ host = getenv("SYS$NODE");
+# else /* !HAVE_UNAME && !VMS */
+ host = "???";
+# endif /* !HAVE_UNAME && !VMS */
+
+ id = (char *) malloc (strlen(name) + strlen(host) + 50);
+ sprintf (id, "%lu (%s@%s)", pid, name, host);
+
+ XChangeProperty (si->dpy, ssi->screensaver_window,
+ XA_SCREENSAVER_ID, XA_STRING,
+ 8, PropModeReplace,
+ (unsigned char *) id, strlen (id));
+ free (id);
+}
+
+
void
-initialize_screensaver_window ()
+store_saver_status (saver_info *si)
{
+ PROP32 *status;
+ int size = si->nscreens + 2;
+ int i;
+
+ status = (PROP32 *) calloc (size, sizeof(PROP32));
+
+ status[0] = (PROP32) (si->screen_blanked_p
+ ? (si->locked_p ? XA_LOCK : XA_BLANK)
+ : 0);
+ status[1] = (PROP32) si->blank_time;
+
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ status [2 + i] = ssi->current_hack + 1;
+ }
+
+ XChangeProperty (si->dpy,
+ RootWindow (si->dpy, 0), /* always screen #0 */
+ XA_SCREENSAVER_STATUS,
+ XA_INTEGER, 32, PropModeReplace,
+ (unsigned char *) status, size);
+ free (status);
+}
+
+
+
+/* Returns the area of the screen which the xscreensaver window should cover.
+ Normally this is the whole screen, but if the X server's root window is
+ actually larger than the monitor's displayable area, then we want to
+ operate in the currently-visible portion of the desktop instead.
+ */
+void
+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);
+ int h = HeightOfScreen (ssi->screen);
+
+# ifdef HAVE_XF86VMODE
+ saver_info *si = ssi->global;
+ saver_preferences *p = &si->prefs;
+ int event, error;
+ int dot;
+ XF86VidModeModeLine ml;
+ int x, y;
+ Bool xinerama_p = si->xinerama_p;
+
+# ifndef 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 */
+
+# ifdef HAVE_XINERAMA
+ if (xinerama_p)
+ {
+ int mouse_p = (target_x != -1 && target_y != -1);
+ int which = -1;
+ int i;
+
+ /* If a mouse position wasn't passed in, assume we're talking about
+ this screen. */
+ if (!mouse_p)
+ {
+ target_x = ssi->x;
+ target_y = ssi->y;
+ which = ssi->number;
+ }
+
+ /* Find the Xinerama rectangle that contains the mouse position. */
+ for (i = 0; i < si->nscreens; i++)
+ {
+ if (which == -1 &&
+ target_x >= si->screens[i].x &&
+ target_y >= si->screens[i].y &&
+ target_x < si->screens[i].x + si->screens[i].width &&
+ target_y < si->screens[i].y + si->screens[i].height)
+ which = i;
+ }
+ if (which == -1) which = 0; /* didn't find it? Use the first. */
+ *x_ret = si->screens[which].x;
+ *y_ret = si->screens[which].y;
+ *w_ret = si->screens[which].width;
+ *h_ret = si->screens[which].height;
+
+ if (verbose_p)
+ {
+ fprintf (stderr, "%s: %d: xinerama vp: %dx%d+%d+%d",
+ blurb(), which,
+ si->screens[which].width, si->screens[which].height,
+ si->screens[which].x, si->screens[which].y);
+ if (mouse_p)
+ fprintf (stderr, "; mouse at %d,%d", target_x, target_y);
+ fprintf (stderr, ".\n");
+ }
+
+ return;
+ }
+# endif /* HAVE_XINERAMA */
+
+ if (!xinerama_p && /* Xinerama + VidMode = broken. */
+ XF86VidModeQueryExtension (si->dpy, &event, &error) &&
+ safe_XF86VidModeGetViewPort (si->dpy, ssi->number, &x, &y) &&
+ XF86VidModeGetModeLine (si->dpy, ssi->number, &dot, &ml))
+ {
+ char msg[512];
+ *x_ret = x;
+ *y_ret = y;
+ *w_ret = ml.hdisplay;
+ *h_ret = ml.vdisplay;
+
+ if (*x_ret == 0 && *y_ret == 0 && *w_ret == w && *h_ret == h)
+ /* There is no viewport -- the screen does not scroll. */
+ return;
+
+
+ /* Apparently some versions of XFree86 return nonsense here!
+ I've had reports of 1024x768 viewports at -1936862040, -1953705044.
+ So, sanity-check the values and give up if they are out of range.
+ */
+ if (*x_ret < 0 || *x_ret >= w ||
+ *y_ret < 0 || *y_ret >= h ||
+ *w_ret <= 0 || *w_ret > w ||
+ *h_ret <= 0 || *h_ret > h)
+ {
+ static int warned_once = 0;
+ if (!warned_once)
+ {
+ fprintf (stderr, "\n"
+ "%s: X SERVER BUG: %dx%d viewport at %d,%d is impossible.\n"
+ "%s: The XVidMode server extension is returning nonsense.\n"
+ "%s: Please report this bug to your X server vendor.\n\n",
+ blurb(), *w_ret, *h_ret, *x_ret, *y_ret,
+ blurb(), blurb());
+ warned_once = 1;
+ }
+ *x_ret = 0;
+ *y_ret = 0;
+ *w_ret = w;
+ *h_ret = h;
+ return;
+ }
+
+ sprintf (msg, "%s: %d: vp is %dx%d+%d+%d",
+ blurb(), ssi->number,
+ *w_ret, *h_ret, *x_ret, *y_ret);
+
+
+ if (p->getviewport_full_of_lies_p)
+ {
+ /* XF86VidModeGetViewPort() tends to be full of lies on laptops
+ that have a docking station or external monitor that runs in
+ a different resolution than the laptop's screen:
+
+ http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=81593
+ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=208417
+ http://bugs.xfree86.org/show_bug.cgi?id=421
+
+ The XFree86 developers have closed the bug. As far as I can
+ tell, their reason for this was, "this is an X server bug,
+ but it's pretty hard to fix. Therefore, we are closing it."
+
+ So, now there's a preference item for those unfortunate users to
+ tell us not to trust a word that XF86VidModeGetViewPort() says.
+ */
+ static int warned_once = 0;
+ if (!warned_once && verbose_p)
+ {
+ warned_once = 1;
+ fprintf (stderr,
+ "%s: %d: XF86VidModeGetViewPort() says vp is %dx%d+%d+%d;\n"
+ "%s: %d: assuming that is a pack of lies;\n"
+ "%s: %d: using %dx%d+0+0 instead.\n",
+ blurb(), ssi->number,
+ *w_ret, *h_ret, *x_ret, *y_ret,
+ blurb(), ssi->number,
+ blurb(), ssi->number, w, h);
+ }
+
+ *x_ret = 0;
+ *y_ret = 0;
+ *w_ret = w;
+ *h_ret = h;
+ return;
+ }
+
+
+ /* Apparently, though the server stores the X position in increments of
+ 1 pixel, it will only make changes to the *display* in some other
+ increment. With XF86_SVGA on a Thinkpad, the display only updates
+ in multiples of 8 pixels when in 8-bit mode, and in multiples of 4
+ pixels in 16-bit mode. I don't know what it does in 24- and 32-bit
+ mode, because I don't have enough video memory to find out.
+
+ I consider it a bug that XF86VidModeGetViewPort() is telling me the
+ server's *target* scroll position rather than the server's *actual*
+ scroll position. David Dawes agrees, and says they may fix this in
+ XFree86 4.0, but it's notrivial.
+
+ He also confirms that this behavior is server-dependent, so the
+ actual scroll position cannot be reliably determined by the client.
+ So... that means the only solution is to provide a ``sandbox''
+ around the blackout window -- we make the window be up to N pixels
+ larger than the viewport on both the left and right sides. That
+ means some part of the outer edges of each hack might not be
+ visible, but screw it.
+
+ I'm going to guess that 16 pixels is enough, and that the Y dimension
+ doesn't have this problem.
+
+ The drawback of doing this, of course, is that some of the screenhacks
+ will still look pretty stupid -- for example, "slidescreen" will cut
+ off the left and right edges of the grid, etc.
+ */
+# define FUDGE 16
+ if (x > 0 && x < w - ml.hdisplay) /* not at left edge or right edge */
+ {
+ /* Round X position down to next lower multiple of FUDGE.
+ Increase width by 2*FUDGE in case some server rounds up.
+ */
+ *x_ret = ((x - 1) / FUDGE) * FUDGE;
+ *w_ret += (FUDGE * 2);
+ }
+# undef FUDGE
+
+ if (*x_ret != x ||
+ *y_ret != y ||
+ *w_ret != ml.hdisplay ||
+ *h_ret != ml.vdisplay)
+ sprintf (msg + strlen(msg), "; fudged to %dx%d+%d+%d",
+ *w_ret, *h_ret, *x_ret, *y_ret);
+
+ if (verbose_p)
+ fprintf (stderr, "%s.\n", msg);
+
+ return;
+ }
+
+# endif /* HAVE_XF86VMODE */
+
+ *x_ret = 0;
+ *y_ret = 0;
+ *w_ret = w;
+ *h_ret = h;
+}
+
+
+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);
+}
+
+
+#ifdef HAVE_XF86VMODE
+static Bool
+safe_XF86VidModeGetViewPort (Display *dpy, int screen, int *xP, int *yP)
+{
+ Bool result;
+ XErrorHandler old_handler;
+ XSync (dpy, False);
+ error_handler_hit_p = False;
+ old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
+
+ result = XF86VidModeGetViewPort (dpy, screen, xP, yP);
+
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ XSync (dpy, False);
+
+ return (error_handler_hit_p
+ ? False
+ : result);
+}
+
+/* There is no "safe_XF86VidModeGetModeLine" because it fails with an
+ untrappable I/O error instead of an X error -- so one must call
+ safe_XF86VidModeGetViewPort first, and assume that both have the
+ same error condition. Thank you XFree, may I have another.
+ */
+
+#endif /* HAVE_XF86VMODE */
+
+
+static void
+initialize_screensaver_window_1 (saver_screen_info *ssi)
+{
+ saver_info *si = ssi->global;
+ saver_preferences *p = &si->prefs;
+ Bool install_cmap_p = ssi->install_cmap_p; /* not p->install_cmap_p */
+
/* This resets the screensaver window as fully as possible, since there's
no way of knowing what some random client may have done to us in the
meantime. We could just destroy and recreate the window, but that has
its own set of problems...
*/
XColor black;
- XClassHint class_hints;
XSetWindowAttributes attrs;
unsigned long attrmask;
- int width = WidthOfScreen (screen);
- int height = HeightOfScreen (screen);
- char id [2048];
+ 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, -1, -1,
+ (p->verbose_p && !si->screen_blanked_p));
black.red = black.green = black.blue = 0;
- if (cmap == DefaultColormapOfScreen (screen))
- cmap = 0;
+ if (ssi->cmap == DefaultColormapOfScreen (ssi->screen))
+ ssi->cmap = 0;
+
+ if (ssi->current_visual != DefaultVisualOfScreen (ssi->screen))
+ /* It's not the default visual, so we have no choice but to install. */
+ install_cmap_p = True;
- if ((install_cmap_p && !demo_mode_p) ||
- (visual != DefaultVisualOfScreen (screen)))
+ if (install_cmap_p)
{
- if (! cmap)
+ if (! ssi->cmap)
{
- cmap = XCreateColormap (dpy, RootWindowOfScreen (screen),
- visual, AllocNone);
- if (! XAllocColor (dpy, cmap, &black)) abort ();
- black_pixel = black.pixel;
+ ssi->cmap = XCreateColormap (si->dpy,
+ RootWindowOfScreen (ssi->screen),
+ ssi->current_visual, AllocNone);
+ if (! XAllocColor (si->dpy, ssi->cmap, &black)) abort ();
+ ssi->black_pixel = black.pixel;
}
}
else
{
- if (cmap)
+ Colormap def_cmap = DefaultColormapOfScreen (ssi->screen);
+ if (ssi->cmap)
{
- XFreeColors (dpy, cmap, &black_pixel, 1, 0);
- XFreeColormap (dpy, cmap);
+ XFreeColors (si->dpy, ssi->cmap, &ssi->black_pixel, 1, 0);
+ if (ssi->cmap != ssi->demo_cmap &&
+ ssi->cmap != def_cmap)
+ XFreeColormap (si->dpy, ssi->cmap);
}
- cmap = DefaultColormapOfScreen (screen);
- black_pixel = BlackPixelOfScreen (screen);
- }
-
- if (cmap2)
- {
- XFreeColormap (dpy, cmap2);
- cmap2 = 0;
- }
-
- if (fade_p)
- {
- cmap2 = copy_colormap (dpy, cmap, 0);
- if (! cmap2)
- fade_p = unfade_p = 0;
+ ssi->cmap = def_cmap;
+ ssi->black_pixel = BlackPixelOfScreen (ssi->screen);
}
attrmask = (CWOverrideRedirect | CWEventMask | CWBackingStore | CWColormap |
CWBackPixel | CWBackingPixel | CWBorderPixel);
attrs.override_redirect = True;
+
+ /* When use_mit_saver_extension or use_sgi_saver_extension is true, we won't
+ actually be reading these events during normal operation; but we still
+ need to see Button events for demo-mode to work properly.
+ */
attrs.event_mask = (KeyPressMask | KeyReleaseMask |
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask);
+
attrs.backing_store = NotUseful;
- attrs.colormap = cmap;
- attrs.background_pixel = black_pixel;
- attrs.backing_pixel = black_pixel;
- attrs.border_pixel = black_pixel;
+ attrs.colormap = ssi->cmap;
+ attrs.background_pixel = ssi->black_pixel;
+ attrs.backing_pixel = ssi->black_pixel;
+ attrs.border_pixel = ssi->black_pixel;
+
+ if (p->debug_p
+# ifdef QUAD_MODE
+ && !p->quad_p
+# endif
+ )
+ width = width / 2;
+
+ if (!p->verbose_p || printed_visual_info)
+ ;
+ else if (ssi->current_visual == DefaultVisualOfScreen (ssi->screen))
+ {
+ fprintf (stderr, "%s: %d: visual ", blurb(), ssi->number);
+ describe_visual (stderr, ssi->screen, ssi->current_visual,
+ install_cmap_p);
+ }
+ else
+ {
+ fprintf (stderr, "%s: using visual: ", blurb());
+ describe_visual (stderr, ssi->screen, ssi->current_visual,
+ install_cmap_p);
+ fprintf (stderr, "%s: default visual: ", blurb());
+ describe_visual (stderr, ssi->screen,
+ DefaultVisualOfScreen (ssi->screen),
+ ssi->install_cmap_p);
+ }
+ printed_visual_info = True;
+
+#ifdef HAVE_MIT_SAVER_EXTENSION
+ if (si->using_mit_saver_extension)
+ {
+ XScreenSaverInfo *info;
+ Window root = RootWindowOfScreen (ssi->screen);
-/* if (demo_mode_p || lock_p) width = width / 2; #### */
+#if 0
+ /* This call sets the server screensaver timeouts to what we think
+ they should be (based on the resources and args xscreensaver was
+ started with.) It's important that we do this to sync back up
+ with the server - if we have turned on prematurely, as by an
+ ACTIVATE ClientMessage, then the server may decide to activate
+ the screensaver while it's already active. That's ok for us,
+ since we would know to ignore that ScreenSaverActivate event,
+ but a side effect of this would be that the server would map its
+ saver window (which we then hide again right away) meaning that
+ the bits currently on the screen get blown away. Ugly. */
+
+ /* #### Ok, that doesn't work - when we tell the server that the
+ screensaver is "off" it sends us a Deactivate event, which is
+ sensible... but causes the saver to never come on. Hmm. */
+ disable_builtin_screensaver (si, True);
+#endif /* 0 */
+
+#if 0
+ /* #### The MIT-SCREEN-SAVER extension gives us access to the
+ window that the server itself uses for saving the screen.
+ However, using this window in any way, in particular, calling
+ XScreenSaverSetAttributes() as below, tends to make the X server
+ crash. So fuck it, let's try and get along without using it...
+
+ It's also inconvenient to use this window because it doesn't
+ always exist (though the ID is constant.) So to use this
+ window, we'd have to reimplement the ACTIVATE ClientMessage to
+ tell the *server* to tell *us* to turn on, to cause the window
+ to get created at the right time. Gag. */
+ XScreenSaverSetAttributes (si->dpy, root,
+ 0, 0, width, height, 0,
+ current_depth, InputOutput, visual,
+ attrmask, &attrs);
+ XSync (si->dpy, False);
+#endif /* 0 */
+
+ info = XScreenSaverAllocInfo ();
+ XScreenSaverQueryInfo (si->dpy, root, info);
+ ssi->server_mit_saver_window = info->window;
+ if (! ssi->server_mit_saver_window) abort ();
+ XFree (info);
+ }
+#endif /* HAVE_MIT_SAVER_EXTENSION */
- if (screensaver_window)
+ if (ssi->screensaver_window)
{
XWindowChanges changes;
unsigned int changesmask = CWX|CWY|CWWidth|CWHeight|CWBorderWidth;
- changes.x = 0;
- changes.y = 0;
+ changes.x = x;
+ changes.y = y;
changes.width = width;
changes.height = height;
changes.border_width = 0;
- XConfigureWindow (dpy, screensaver_window, changesmask, &changes);
- XChangeWindowAttributes (dpy, 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;
+ }
}
+
+ if (!ssi->screensaver_window)
+ {
+ ssi->screensaver_window =
+ XCreateWindow (si->dpy, RootWindowOfScreen (ssi->screen),
+ x, y, width, height,
+ 0, ssi->current_depth, InputOutput,
+ 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: %d: saver window is 0x%lx.\n",
+ blurb(), ssi->number,
+ (unsigned long) ssi->screensaver_window);
+ }
+
+ store_saver_id (ssi); /* store window name and IDs */
+
+ if (!ssi->cursor)
+ {
+ Pixmap bit;
+ bit = XCreatePixmapFromBitmapData (si->dpy, ssi->screensaver_window,
+ "\000", 1, 1,
+ BlackPixelOfScreen (ssi->screen),
+ BlackPixelOfScreen (ssi->screen),
+ 1);
+ ssi->cursor = XCreatePixmapCursor (si->dpy, bit, bit, &black, &black,
+ 0, 0);
+ XFreePixmap (si->dpy, bit);
+ }
+
+ XSetWindowBackground (si->dpy, ssi->screensaver_window, ssi->black_pixel);
+
+ if (si->demoing_p)
+ XUndefineCursor (si->dpy, ssi->screensaver_window);
else
+ XDefineCursor (si->dpy, ssi->screensaver_window, ssi->cursor);
+}
+
+void
+initialize_screensaver_window (saver_info *si)
+{
+ int i;
+ for (i = 0; i < si->nscreens; i++)
+ initialize_screensaver_window_1 (&si->screens[i]);
+}
+
+
+/* Called when the RANDR (Resize and Rotate) extension tells us that the
+ size of the screen has changed while the screen was blanked. If we
+ don't do this, then the screen saver will no longer fully fill the
+ screen, and some of the underlying desktop may be visible.
+ */
+void
+resize_screensaver_window (saver_info *si)
+{
+ saver_preferences *p = &si->prefs;
+ int i;
+
+ /* First update the size info in the saver_screen_info structs.
+ */
+
+# ifdef HAVE_XINERAMA
+ if (si->xinerama_p)
+ {
+ /* As of XFree86 4.3.0, the RANDR and XINERAMA extensions cannot coexist.
+ However, maybe they will someday, so I'm guessing that the right thing
+ to do in that case will be to re-query the Xinerama rectangles after
+ a RANDR size change is received: presumably, if the resolution of one
+ or more of the monitors has changed, then the Xinerama rectangle
+ corresponding to that monitor will also have been updated.
+ */
+ int nscreens;
+ XineramaScreenInfo *xsi = XineramaQueryScreens (si->dpy, &nscreens);
+
+ if (nscreens != si->nscreens) {
+ /* Apparently some Xinerama implementations let you use a hot-key
+ to change the number of screens in use! This is, of course,
+ documented nowhere. Let's try to do something marginally less
+ bad than crashing.
+ */
+ fprintf (stderr, "%s: bad craziness: xinerama screen count changed "
+ "from %d to %d!\n", blurb(), si->nscreens, nscreens);
+ if (nscreens > si->nscreens)
+ nscreens = si->nscreens;
+ }
+
+ if (!xsi) abort();
+ for (i = 0; i < nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ if (p->verbose_p &&
+ (ssi->x != xsi[i].x_org ||
+ ssi->y != xsi[i].y_org ||
+ ssi->width != xsi[i].width ||
+ ssi->height != xsi[i].height))
+ fprintf (stderr,
+ "%s: %d: resize xinerama from %dx%d+%d+%d to %dx%d+%d+%d\n",
+ blurb(), i,
+ ssi->width, ssi->height, ssi->x, ssi->y,
+ xsi[i].width, xsi[i].height, xsi[i].x_org, xsi[i].y_org);
+
+ ssi->x = xsi[i].x_org;
+ ssi->y = xsi[i].y_org;
+ ssi->width = xsi[i].width;
+ ssi->height = xsi[i].height;
+ }
+ XFree (xsi);
+ }
+ else
+# endif /* HAVE_XINERAMA */
{
- if (! verbose_p)
- ;
- else if (visual == DefaultVisualOfScreen (screen))
+ /* Not Xinerama -- get the real sizes of the root windows. */
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ XWindowAttributes xgwa;
+ XGetWindowAttributes (si->dpy, RootWindowOfScreen (ssi->screen),
+ &xgwa);
+
+ if (p->verbose_p &&
+ (ssi->x != xgwa.x ||
+ ssi->y != xgwa.y ||
+ ssi->width != xgwa.width ||
+ ssi->height != xgwa.height))
+ fprintf (stderr,
+ "%s: %d: resize screen from %dx%d+%d+%d to %dx%d+%d+%d\n",
+ blurb(), i,
+ ssi->width, ssi->height, ssi->x, ssi->y,
+ xgwa.width, xgwa.height, xgwa.x, xgwa.y);
+
+ ssi->x = xgwa.x;
+ ssi->y = xgwa.y;
+ ssi->width = xgwa.width;
+ ssi->height = xgwa.height;
+ }
+ }
+
+ /* Next, ensure that the screensaver windows are the right size, taking
+ into account both the new size of the screen in question's root window,
+ and any viewport within that.
+ */
+
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ XWindowAttributes xgwa;
+ XWindowChanges changes;
+ int x, y, width, height;
+ unsigned int changesmask = CWX|CWY|CWWidth|CWHeight|CWBorderWidth;
+
+ XGetWindowAttributes (si->dpy, ssi->screensaver_window, &xgwa);
+ get_screen_viewport (ssi, &x, &y, &width, &height, -1, -1,
+ (p->verbose_p && !si->screen_blanked_p));
+ if (xgwa.x == x &&
+ xgwa.y == y &&
+ xgwa.width == width &&
+ xgwa.height == height)
+ continue; /* no change! */
+
+ changes.x = x;
+ changes.y = y;
+ changes.width = width;
+ changes.height = height;
+ changes.border_width = 0;
+
+ if (p->debug_p
+# ifdef QUAD_MODE
+ && !p->quad_p
+# endif
+ )
+ changes.width = changes.width / 2;
+
+ if (p->verbose_p)
+ fprintf (stderr,
+ "%s: %d: resize 0x%lx from %dx%d+%d+%d to %dx%d+%d+%d\n",
+ blurb(), i, (unsigned long) ssi->screensaver_window,
+ xgwa.width, xgwa.height, xgwa.x, xgwa.y,
+ width, height, x, y);
+ if (! safe_XConfigureWindow (si->dpy, ssi->screensaver_window,
+ changesmask, &changes))
+ {
+ fprintf (stderr,
+ "%s: %d: someone horked our saver window (0x%lx)! Unable to resize it!\n",
+ blurb(), i, (unsigned long) ssi->screensaver_window);
+ }
+ }
+}
+
+
+void
+raise_window (saver_info *si,
+ Bool inhibit_fade, Bool between_hacks_p, Bool dont_clear)
+{
+ saver_preferences *p = &si->prefs;
+ int i;
+
+ if (si->demoing_p)
+ inhibit_fade = True;
+
+ if (si->emergency_lock_p)
+ inhibit_fade = True;
+
+ if (!dont_clear)
+ initialize_screensaver_window (si);
+
+ reset_watchdog_timer (si, True);
+
+ if (p->fade_p && si->fading_possible_p && !inhibit_fade)
+ {
+ Window *current_windows = (Window *)
+ calloc(sizeof(Window), si->nscreens);
+ Colormap *current_maps = (Colormap *)
+ calloc(sizeof(Colormap), si->nscreens);
+
+ for (i = 0; i < si->nscreens; i++)
{
- fprintf (stderr, "%s: using default visual ", progname);
- describe_visual (stderr, dpy, visual);
+ saver_screen_info *ssi = &si->screens[i];
+ current_windows[i] = ssi->screensaver_window;
+ current_maps[i] = (between_hacks_p
+ ? ssi->cmap
+ : DefaultColormapOfScreen (ssi->screen));
+ /* Ensure that the default background of the window is really black,
+ not a pixmap or something. (This does not clear the window.) */
+ XSetWindowBackground (si->dpy, ssi->screensaver_window,
+ ssi->black_pixel);
}
- else
+
+ if (p->verbose_p) fprintf (stderr, "%s: fading...\n", blurb());
+
+ XGrabServer (si->dpy); /* ############ DANGER! */
+
+ /* Clear the stderr layer on each screen.
+ */
+ if (!dont_clear)
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ if (ssi->stderr_overlay_window)
+ /* Do this before the fade, since the stderr cmap won't fade
+ even if we uninstall it (beats me...) */
+ clear_stderr (ssi);
+ }
+
+ /* Note! The server is grabbed, and this will take several seconds
+ to complete! */
+ fade_screens (si->dpy, current_maps,
+ current_windows, si->nscreens,
+ p->fade_seconds/1000, p->fade_ticks, True, !dont_clear);
+
+ free(current_maps);
+ free(current_windows);
+ current_maps = 0;
+ current_windows = 0;
+
+ if (p->verbose_p) fprintf (stderr, "%s: fading done.\n", blurb());
+
+#ifdef HAVE_MIT_SAVER_EXTENSION
+ for (i = 0; i < si->nscreens; i++)
{
- fprintf (stderr, "%s: using visual: ", progname);
- describe_visual (stderr, dpy, visual);
- fprintf (stderr, "%s: default visual: ", progname);
- describe_visual (stderr, dpy, DefaultVisualOfScreen (screen));
+ saver_screen_info *ssi = &si->screens[i];
+ if (ssi->server_mit_saver_window &&
+ window_exists_p (si->dpy, ssi->server_mit_saver_window))
+ XUnmapWindow (si->dpy, ssi->server_mit_saver_window);
}
+#endif /* HAVE_MIT_SAVER_EXTENSION */
- screensaver_window =
- XCreateWindow (dpy, RootWindowOfScreen (screen), 0, 0, width, height,
- 0, visual_depth, InputOutput, visual, attrmask,
- &attrs);
+ XUngrabServer (si->dpy);
+ XSync (si->dpy, False); /* ###### (danger over) */
+ }
+ else
+ {
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ if (!dont_clear)
+ XClearWindow (si->dpy, ssi->screensaver_window);
+ if (!dont_clear || ssi->stderr_overlay_window)
+ clear_stderr (ssi);
+ XMapRaised (si->dpy, ssi->screensaver_window);
+#ifdef HAVE_MIT_SAVER_EXTENSION
+ if (ssi->server_mit_saver_window &&
+ window_exists_p (si->dpy, ssi->server_mit_saver_window))
+ XUnmapWindow (si->dpy, ssi->server_mit_saver_window);
+#endif /* HAVE_MIT_SAVER_EXTENSION */
+ }
}
- class_hints.res_name = progname;
- class_hints.res_class = progclass;
- XSetClassHint (dpy, screensaver_window, &class_hints);
- XStoreName (dpy, screensaver_window, "screensaver");
- XChangeProperty (dpy, screensaver_window, XA_SCREENSAVER_VERSION,
- XA_STRING, 8, PropModeReplace,
- (unsigned char *) screensaver_version,
- strlen (screensaver_version));
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ if (ssi->cmap)
+ XInstallColormap (si->dpy, ssi->cmap);
+ }
+}
- sprintf (id, "%d on host ", getpid ());
- if (! XmuGetHostname (id + strlen (id), sizeof (id) - strlen (id) - 1))
- strcat (id, "???");
- XChangeProperty (dpy, screensaver_window, XA_SCREENSAVER_ID, XA_STRING, 8,
- PropModeReplace, (unsigned char *) id, strlen (id));
- if (!cursor)
+int
+mouse_screen (saver_info *si)
+{
+ saver_preferences *p = &si->prefs;
+ Window pointer_root, pointer_child;
+ int root_x, root_y, win_x, win_y;
+ unsigned int mask;
+ int i;
+
+ if (si->nscreens == 1)
+ return 0;
+
+ for (i = 0; i < si->nscreens; i++)
{
- Pixmap bit;
- bit = XCreatePixmapFromBitmapData (dpy, screensaver_window, "\000", 1, 1,
- BlackPixelOfScreen (screen),
- BlackPixelOfScreen (screen), 1);
- cursor = XCreatePixmapCursor (dpy, bit, bit, &black, &black, 0, 0);
- XFreePixmap (dpy, bit);
+ saver_screen_info *ssi = &si->screens[i];
+ if (XQueryPointer (si->dpy, RootWindowOfScreen (ssi->screen),
+ &pointer_root, &pointer_child,
+ &root_x, &root_y, &win_x, &win_y, &mask) &&
+ root_x >= ssi->x &&
+ root_y >= ssi->y &&
+ root_x < ssi->x + ssi->width &&
+ root_y < ssi->y + ssi->height)
+ {
+ if (p->verbose_p)
+ fprintf (stderr, "%s: mouse is on screen %d of %d\n",
+ blurb(), i, si->nscreens);
+ return i;
+ }
}
- XSetWindowBackground (dpy, screensaver_window, black_pixel);
- if (! demo_mode_p)
- XDefineCursor (dpy, screensaver_window, cursor);
- else
- XUndefineCursor (dpy, screensaver_window);
+ /* couldn't figure out where the mouse is? Oh well. */
+ return 0;
}
-void
-raise_window (inhibit_fade, between_hacks_p)
- Bool inhibit_fade, between_hacks_p;
-{
- initialize_screensaver_window ();
-
- if (fade_p && !inhibit_fade && !demo_mode_p)
- {
- int grabbed;
- Colormap current_map = (between_hacks_p
- ? cmap
- : DefaultColormapOfScreen (screen));
- copy_colormap (dpy, current_map, cmap2);
- XGrabServer (dpy);
- /* grab and blacken mouse on the root window (saver not mapped yet) */
- grabbed = grab_mouse (RootWindowOfScreen (screen));
- /* fade what's on the screen to black */
- XInstallColormap (dpy, cmap2);
- fade_colormap (dpy, current_map, cmap2, fade_seconds, fade_ticks, True);
- XClearWindow (dpy, screensaver_window);
- XMapRaised (dpy, screensaver_window);
- /* Once the saver window is up, restore the colormap.
- (The "black" pixels of the two colormaps are compatible.) */
- XInstallColormap (dpy, cmap);
- if (grabbed == GrabSuccess)
- XUngrabPointer (dpy, CurrentTime);
- XUngrabServer (dpy);
+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.
+ */
+ 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 0
+ if (si->using_mit_saver_extension || si->using_sgi_saver_extension)
+ /* If we're using a server extension, then failure to get a grab is
+ not a big deal -- even without the grab, we will still be able
+ to un-blank when there is user activity, since the server will
+ tell us. */
+ /* #### No, that's not true: if we don't have a keyboard grab,
+ then we can't read passwords to unlock.
+ */
+ ok = True;
+# endif /* 0 */
+
+ if (!ok)
+ return False;
+
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ if (ssi->real_screen_p)
+ save_real_vroot (ssi);
+ store_vroot_property (si->dpy,
+ ssi->screensaver_window,
+ ssi->screensaver_window);
+
+#ifdef HAVE_XF86VMODE
+ {
+ int ev, er;
+ if (!XF86VidModeQueryExtension (si->dpy, &ev, &er) ||
+ !safe_XF86VidModeGetViewPort (si->dpy, i,
+ &ssi->blank_vp_x,
+ &ssi->blank_vp_y))
+ ssi->blank_vp_x = ssi->blank_vp_y = -1;
+ }
+#endif /* HAVE_XF86VMODE */
+ }
+
+ raise_window (si, False, False, False);
+
+ si->screen_blanked_p = True;
+ si->blank_time = time ((time_t) 0);
+ si->last_wall_clock_time = 0;
+
+ store_saver_status (si); /* store blank time */
+
+ return True;
+}
+
+
+void
+unblank_screen (saver_info *si)
+{
+ saver_preferences *p = &si->prefs;
+ Bool unfade_p = (si->fading_possible_p && p->unfade_p);
+ int i;
+
+ monitor_power_on (si);
+ reset_watchdog_timer (si, False);
+
+ if (si->demoing_p)
+ unfade_p = False;
+
+ if (unfade_p)
+ {
+ Window *current_windows = (Window *)
+ calloc(sizeof(Window), si->nscreens);
+
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ current_windows[i] = ssi->screensaver_window;
+ /* Ensure that the default background of the window is really black,
+ not a pixmap or something. (This does not clear the window.) */
+ XSetWindowBackground (si->dpy, ssi->screensaver_window,
+ ssi->black_pixel);
+ }
+
+ if (p->verbose_p) fprintf (stderr, "%s: unfading...\n", blurb());
+
+
+ XSync (si->dpy, False);
+ XGrabServer (si->dpy); /* ############ DANGER! */
+ XSync (si->dpy, False);
+
+ /* Clear the stderr layer on each screen.
+ */
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ clear_stderr (ssi);
+ }
+
+ XUngrabServer (si->dpy);
+ XSync (si->dpy, False); /* ###### (danger over) */
+
+ fade_screens (si->dpy, 0,
+ current_windows, si->nscreens,
+ p->fade_seconds/1000, p->fade_ticks,
+ False, False);
+
+ free(current_windows);
+ current_windows = 0;
+
+ if (p->verbose_p) fprintf (stderr, "%s: unfading done.\n", blurb());
}
else
{
- XClearWindow (dpy, screensaver_window);
- XMapRaised (dpy, screensaver_window);
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ if (ssi->cmap)
+ {
+ Colormap c = DefaultColormapOfScreen (ssi->screen);
+ /* avoid technicolor */
+ XClearWindow (si->dpy, ssi->screensaver_window);
+ if (c) XInstallColormap (si->dpy, c);
+ }
+ XUnmapWindow (si->dpy, ssi->screensaver_window);
+ }
+ }
+
+
+ /* If the focus window does has a non-default colormap, then install
+ that colormap as well. (On SGIs, this will cause both the root map
+ and the focus map to be installed simultaneously. It'd be nice to
+ pick up the other colormaps that had been installed, too; perhaps
+ XListInstalledColormaps could be used for that?)
+ */
+ {
+ Window focus = 0;
+ int revert_to;
+ XGetInputFocus (si->dpy, &focus, &revert_to);
+ if (focus && focus != PointerRoot && focus != None)
+ {
+ XWindowAttributes xgwa;
+ xgwa.colormap = 0;
+ XGetWindowAttributes (si->dpy, focus, &xgwa);
+ if (xgwa.colormap &&
+ xgwa.colormap != DefaultColormapOfScreen (xgwa.screen))
+ XInstallColormap (si->dpy, xgwa.colormap);
+ }
+ }
+
+
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ kill_xsetroot_data (si->dpy, ssi->screensaver_window, p->verbose_p);
}
- if (install_cmap_p && !demo_mode_p)
- XInstallColormap (dpy, cmap);
+ store_saver_status (si); /* store unblank time */
+ ungrab_keyboard_and_mouse (si);
+ restore_real_vroot (si);
+
+ /* Unmap the windows a second time, dammit -- just to avoid a race
+ with the screen-grabbing hacks. (I'm not sure if this is really
+ necessary; I'm stabbing in the dark now.)
+ */
+ for (i = 0; i < si->nscreens; i++)
+ XUnmapWindow (si->dpy, si->screens[i].screensaver_window);
+
+ si->screen_blanked_p = False;
+ si->blank_time = time ((time_t) 0);
+ si->last_wall_clock_time = 0;
+
+ store_saver_status (si); /* store unblank time */
}
-void
-blank_screen ()
-{
- save_real_vroot ();
- store_vroot_property (screensaver_window, screensaver_window);
- raise_window (False, False);
- grab_keyboard_and_mouse ();
-#ifdef __hpux
- if (lock_p)
- XHPDisableReset (dpy); /* turn off C-Sh-Reset */
-#endif
+
+/* 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) */
+ }
}
-void
-unblank_screen ()
-{
- if (unfade_p && !demo_mode_p)
- {
- int grabbed;
- Colormap default_map = DefaultColormapOfScreen (screen);
- blacken_colormap (dpy, cmap2);
- XGrabServer (dpy);
- /* grab and blacken mouse on the root window. */
- grabbed = grab_mouse (RootWindowOfScreen (screen));
- XInstallColormap (dpy, cmap2);
- XUnmapWindow (dpy, screensaver_window);
- fade_colormap (dpy, default_map, cmap2, fade_seconds, fade_ticks, False);
- XInstallColormap (dpy, default_map);
- if (grabbed == GrabSuccess)
- XUngrabPointer (dpy, CurrentTime);
- XUngrabServer (dpy);
+
+
+Bool
+select_visual (saver_screen_info *ssi, const char *visual_name)
+{
+ saver_info *si = ssi->global;
+ saver_preferences *p = &si->prefs;
+ Bool install_cmap_p = p->install_cmap_p;
+ Bool was_installed_p = (ssi->cmap != DefaultColormapOfScreen(ssi->screen));
+ Visual *new_v = 0;
+ Bool got_it;
+
+ /* On some systems (most recently, MacOS X) OpenGL programs get confused
+ when you kill one and re-start another on the same window. So maybe
+ it's best to just always destroy and recreate the xscreensaver window
+ when changing hacks, instead of trying to reuse the old one?
+ */
+ Bool always_recreate_window_p = True;
+
+ if (visual_name && *visual_name)
+ {
+ if (!strcmp(visual_name, "default-i") ||
+ !strcmp(visual_name, "Default-i") ||
+ !strcmp(visual_name, "Default-I")
+ )
+ {
+ visual_name = "default";
+ install_cmap_p = True;
+ }
+ else if (!strcmp(visual_name, "default-n") ||
+ !strcmp(visual_name, "Default-n") ||
+ !strcmp(visual_name, "Default-N"))
+ {
+ visual_name = "default";
+ install_cmap_p = False;
+ }
+ else if (!strcmp(visual_name, "gl") ||
+ !strcmp(visual_name, "Gl") ||
+ !strcmp(visual_name, "GL"))
+ {
+ new_v = ssi->best_gl_visual;
+ if (!new_v && p->verbose_p)
+ fprintf (stderr, "%s: no GL visuals.\n", progname);
+ }
+
+ if (!new_v)
+ new_v = get_visual (ssi->screen, visual_name, True, False);
}
else
{
- if (install_cmap_p && !demo_mode_p)
+ new_v = ssi->default_visual;
+ }
+
+ got_it = !!new_v;
+
+ if (new_v && new_v != DefaultVisualOfScreen(ssi->screen))
+ /* It's not the default visual, so we have no choice but to install. */
+ install_cmap_p = True;
+
+ ssi->install_cmap_p = install_cmap_p;
+
+ if (new_v &&
+ (always_recreate_window_p ||
+ (ssi->current_visual != new_v) ||
+ (install_cmap_p != was_installed_p)))
+ {
+ Colormap old_c = ssi->cmap;
+ Window old_w = ssi->screensaver_window;
+
+ if (p->verbose_p)
{
- XClearWindow (dpy, screensaver_window); /* avoid technicolor */
- XInstallColormap (dpy, DefaultColormapOfScreen (screen));
- }
- XUnmapWindow (dpy, screensaver_window);
- }
- kill_xsetroot_data ();
- ungrab_keyboard_and_mouse ();
- restore_real_vroot ();
-#ifdef __hpux
- if (lock_p)
- XHPEnableReset (dpy); /* turn C-Sh-Reset back on */
+ 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());
+ describe_visual (stderr, ssi->screen, ssi->current_visual,
+ was_installed_p);
#endif
+ }
+
+ reset_stderr (ssi);
+ ssi->current_visual = new_v;
+ ssi->current_depth = visual_depth(ssi->screen, new_v);
+ ssi->cmap = 0;
+ ssi->screensaver_window = 0;
+
+ initialize_screensaver_window_1 (ssi);
+
+ /* stderr_overlay_window is a child of screensaver_window, so we need
+ to destroy that as well (actually, we just need to invalidate and
+ drop our pointers to it, but this will destroy it, which is ok so
+ long as it happens before old_w itself is destroyed.) */
+ reset_stderr (ssi);
+
+ raise_window (si, True, True, False);
+ 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);
+
+ /* Now we can destroy the old window without horking our grabs. */
+ XDestroyWindow (si->dpy, old_w);
+
+ if (p->verbose_p)
+ 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) &&
+ old_c != ssi->demo_cmap)
+ XFreeColormap (si->dpy, old_c);
+ }
+
+ return got_it;
}
projects / xscreensaver / blobdiff