http://www.tienza.es/crux/src/www.jwz.org/xscreensaver/xscreensaver-5.05.tar.gz

[xscreensaver] / driver / xscreensaver.c

diff --git a/driver/xscreensaver.c b/driver/xscreensaver.c
index bc20b12d6846b037c185b10c1dbbe8203d8d35fc..92b28625c1a6337be6cdfbc178832116194e5861 100644 (file)
--- a/driver/xscreensaver.c
+++ b/driver/xscreensaver.c
@@ -1,4 +1,4 @@
-/* xscreensaver, Copyright (c) 1991-2002 Jamie Zawinski <jwz@jwz.org>
+/* 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
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that


@@ -16,11 +16,11 @@
  *   on (nearly) all windows; or by waiting for the MIT-SCREEN-SAVER extension
  *   to send us a "you are idle" event.
  *
  *   on (nearly) all windows; or by waiting for the MIT-SCREEN-SAVER extension
  *   to send us a "you are idle" event.
  *

- *   Then, we map a full screen black window (or, in the case of the 
- *   MIT-SCREEN-SAVER extension, use the one it gave us.)
+ *   Then, we map a full screen black window.

  *
  *   We place a __SWM_VROOT property on this window, so that newly-started
  *
  *   We place a __SWM_VROOT property on this window, so that newly-started

- *   clients will think that this window is a "virtual root" window.
+ *   clients will think that this window is a "virtual root" window (as per
+ *   the logic in the historical "vroot.h" header.)

  *
  *   If there is an existing "virtual root" window (one that already had
  *   an __SWM_VROOT property) then we remove that property from that window.
  *
  *   If there is an existing "virtual root" window (one that already had
  *   an __SWM_VROOT property) then we remove that property from that window.


@@ -38,10 +38,18 @@
  *   When they are, we kill the inferior process, unmap the window, and restore
  *   the __SWM_VROOT property to the real virtual root window if there was one.
  *
  *   When they are, we kill the inferior process, unmap the window, and restore
  *   the __SWM_VROOT property to the real virtual root window if there was one.
  *

- *   While we are waiting, we also set up timers so that, after a certain 
- *   amount of time has passed, we can start a different screenhack.  We do
- *   this by killing the running child process with SIGTERM, and then starting
- *   a new one in the same way.
+ *   On multi-screen systems, we do the above on each screen, and start
+ *   multiple programs, each with a different value of $DISPLAY.
+ *
+ *   On Xinerama systems, we do a similar thing, but instead create multiple
+ *   windows on the (only) display, and tell the subprocess which one to use
+ *   via the $XSCREENSAVER_WINDOW environment variable -- this trick requires
+ *   a recent (Aug 2003) revision of vroot.h.
+ *
+ *   While we are waiting for user activity, we also set up timers so that,
+ *   after a certain amount of time has passed, we can start a different
+ *   screenhack.  We do this by killing the running child process with
+ *   SIGTERM, and then starting a new one in the same way.

  *
  *   If there was a real virtual root, meaning that we removed the __SWM_VROOT
  *   property from it, meaning we must (absolutely must) restore it before we
  *
  *   If there was a real virtual root, meaning that we removed the __SWM_VROOT
  *   property from it, meaning we must (absolutely must) restore it before we


@@ -57,7 +65,7 @@
  *   can really fuck up the world by killing this process with "kill -9".
  *
  *   This program accepts ClientMessages of type SCREENSAVER; these messages
  *   can really fuck up the world by killing this process with "kill -9".
  *
  *   This program accepts ClientMessages of type SCREENSAVER; these messages

- *   may contain the atom ACTIVATE or DEACTIVATE, meaning to turn the 
+ *   may contain the atoms ACTIVATE, DEACTIVATE, etc, meaning to turn the 

  *   screensaver on or off now, regardless of the idleness of the user,
  *   and a few other things.  The included "xscreensaver-command" program
  *   sends these messsages.
  *   screensaver on or off now, regardless of the idleness of the user,
  *   and a few other things.  The included "xscreensaver-command" program
  *   sends these messsages.


@@ -92,9 +100,15 @@
  *   "client changing event mask" problem that the KeyPress events hack does.
  *   I think polling is more reliable.
  *
  *   "client changing event mask" problem that the KeyPress events hack does.
  *   I think polling is more reliable.
  *

- *   None of this crap happens if we're using one of the extensions, so install
- *   one of them if the description above sounds just too flaky to live.  It
- *   is, but those are your choices.
+ *   On systems with /proc/interrupts (Linux) we poll that file and note when
+ *   the interrupt counter numbers on the "keyboard" and "PS/2" lines change.
+ *   (There is no reliable way, using /proc/interrupts, to detect non-PS/2
+ *   mice, so it doesn't help for serial or USB mice.)
+ *
+ *   None of this crap happens if we're using one of the extensions.  Sadly,
+ *   the XIdle extension hasn't been available for many years; the SGI
+ *   extension only exists on SGIs; and the MIT extension, while widely
+ *   deployed, is garbage in several ways.

  *
  *   A third idle-detection option could be implemented (but is not): when
  *   running on the console display ($DISPLAY is `localhost`:0) and we're on a
  *
  *   A third idle-detection option could be implemented (but is not): when
  *   running on the console display ($DISPLAY is `localhost`:0) and we're on a


@@ -127,6 +141,9 @@
 #include <stdio.h>
 #include <ctype.h>
 #include <X11/Xlib.h>
 #include <stdio.h>
 #include <ctype.h>
 #include <X11/Xlib.h>

+
+#include <X11/Xlibint.h>
+

 #include <X11/Xatom.h>
 #include <X11/Intrinsic.h>
 #include <X11/StringDefs.h>
 #include <X11/Xatom.h>
 #include <X11/Intrinsic.h>
 #include <X11/StringDefs.h>


@@ -135,6 +152,8 @@
 #include <time.h>
 #include <sys/time.h>
 #include <netdb.h>     /* for gethostbyname() */
 #include <time.h>
 #include <sys/time.h>
 #include <netdb.h>     /* for gethostbyname() */

+#include <sys/types.h>
+#include <pwd.h>

 #ifdef HAVE_XMU
 # ifndef VMS
 #  include <X11/Xmu/Error.h>
 #ifdef HAVE_XMU
 # ifndef VMS
 #  include <X11/Xmu/Error.h>


@@ -149,12 +168,17 @@
 # include <X11/extensions/xidle.h>
 #endif /* HAVE_XIDLE_EXTENSION */
 
 # include <X11/extensions/xidle.h>
 #endif /* HAVE_XIDLE_EXTENSION */
 

+#ifdef HAVE_XINERAMA
+# include <X11/extensions/Xinerama.h>
+#endif /* HAVE_XINERAMA */
+

 #include "xscreensaver.h"
 #include "version.h"
 #include "yarandom.h"
 #include "resources.h"
 #include "visual.h"
 #include "usleep.h"
 #include "xscreensaver.h"
 #include "version.h"
 #include "yarandom.h"
 #include "resources.h"
 #include "visual.h"
 #include "usleep.h"

+#include "auth.h"

 
 saver_info *global_si_kludge = 0;      /* I hate C so much... */
 
 
 saver_info *global_si_kludge = 0;      /* I hate C so much... */
 


@@ -181,38 +205,14 @@ static XrmOptionDescRec options [] = {
 
   /* useful for debugging */
   { "-no-capture-stderr",  ".captureStderr",   XrmoptionNoArg, "off" },
 
   /* useful for debugging */
   { "-no-capture-stderr",  ".captureStderr",   XrmoptionNoArg, "off" },

-
-  /* There's really no reason to have these command-line args; they just
-     lead to confusion when the .xscreensaver file has conflicting values.
-   */
-#if 0
-  { "-splash",            ".splash",           XrmoptionNoArg, "on" },
-  { "-capture-stderr",    ".captureStderr",    XrmoptionNoArg, "on" },
-  { "-timeout",                   ".timeout",          XrmoptionSepArg, 0 },
-  { "-cycle",             ".cycle",            XrmoptionSepArg, 0 },
-  { "-lock-mode",         ".lock",             XrmoptionNoArg, "on" },
-  { "-no-lock-mode",      ".lock",             XrmoptionNoArg, "off" },
-  { "-no-lock",                   ".lock",             XrmoptionNoArg, "off" },
-  { "-lock-timeout",      ".lockTimeout",      XrmoptionSepArg, 0 },
-  { "-lock-vts",          ".lockVTs",          XrmoptionNoArg, "on" },
-  { "-no-lock-vts",       ".lockVTs",          XrmoptionNoArg, "off" },
-  { "-visual",            ".visualID",         XrmoptionSepArg, 0 },
-  { "-install",                   ".installColormap",  XrmoptionNoArg, "on" },
-  { "-no-install",        ".installColormap",  XrmoptionNoArg, "off" },
-  { "-timestamp",         ".timestamp",        XrmoptionNoArg, "on" },
-  { "-xidle-extension",           ".xidleExtension",   XrmoptionNoArg, "on" },
-  { "-no-xidle-extension", ".xidleExtension",  XrmoptionNoArg, "off" },
-  { "-mit-extension",     ".mitSaverExtension",XrmoptionNoArg, "on" },
-  { "-no-mit-extension",   ".mitSaverExtension",XrmoptionNoArg, "off" },
-  { "-sgi-extension",     ".sgiSaverExtension",XrmoptionNoArg, "on" },
-  { "-no-sgi-extension",   ".sgiSaverExtension",XrmoptionNoArg, "off" },
-  { "-proc-interrupts",           ".procInterrupts",   XrmoptionNoArg, "on" },
-  { "-no-proc-interrupts", ".procInterrupts",  XrmoptionNoArg, "off" },
-  { "-idelay",            ".initialDelay",     XrmoptionSepArg, 0 },
-  { "-nice",              ".nice",             XrmoptionSepArg, 0 },
-#endif /* 0 */

 };
 
 };
 

+#ifdef __GNUC__
+ __extension__     /* shut up about "string length is greater than the length
+                      ISO C89 compilers are required to support" when including
+                      the .ad file... */
+#endif
+

 static char *defaults[] = {
 #include "XScreenSaver_ad.h"
  0
 static char *defaults[] = {
 #include "XScreenSaver_ad.h"
  0


@@ -228,13 +228,15 @@ do_help (saver_info *si)
   fflush (stdout);
   fflush (stderr);
   fprintf (stdout, "\
   fflush (stdout);
   fflush (stderr);
   fprintf (stdout, "\

-xscreensaver %s, copyright (c) 1991-2002 by Jamie Zawinski <jwz@jwz.org>\n\
+xscreensaver %s, copyright (c) 1991-2008 by Jamie Zawinski <jwz@jwz.org>\n\

 \n\
   All xscreensaver configuration is via the `~/.xscreensaver' file.\n\
   Rather than editing that file by hand, just run `xscreensaver-demo':\n\
   that program lets you configure the screen saver graphically,\n\
   including timeouts, locking, and display modes.\n\
 \n\
   All xscreensaver configuration is via the `~/.xscreensaver' file.\n\
   Rather than editing that file by hand, just run `xscreensaver-demo':\n\
   that program lets you configure the screen saver graphically,\n\
   including timeouts, locking, and display modes.\n\

-\n\
+\n",
+         si->version);
+  fprintf (stdout, "\

   Just getting started?  Try this:\n\
 \n\
         xscreensaver &\n\
   Just getting started?  Try this:\n\
 \n\
         xscreensaver &\n\


@@ -243,8 +245,8 @@ xscreensaver %s, copyright (c) 1991-2002 by Jamie Zawinski <jwz@jwz.org>\n\
   For updates, online manual, and FAQ, please see the web page:\n\
 \n\
        http://www.jwz.org/xscreensaver/\n\
   For updates, online manual, and FAQ, please see the web page:\n\
 \n\
        http://www.jwz.org/xscreensaver/\n\

-\n",
-         si->version);
+\n");
+

   fflush (stdout);
   fflush (stderr);
   exit (1);
   fflush (stdout);
   fflush (stderr);
   exit (1);


@@ -300,11 +302,14 @@ saver_ehandler (Display *dpy, XErrorEvent *error)
           blurb());
 
   for (i = 0; i < si->nscreens; i++)
           blurb());
 
   for (i = 0; i < si->nscreens; i++)

-    fprintf (real_stderr, "%s: screen %d: 0x%x, 0x%x, 0x%x\n",
-             blurb(), i,
-             (unsigned int) RootWindowOfScreen (si->screens[i].screen),
-             (unsigned int) si->screens[i].real_vroot,
-             (unsigned int) si->screens[i].screensaver_window);
+    {
+      saver_screen_info *ssi = &si->screens[i];
+      fprintf (real_stderr, "%s: screen %d/%d: 0x%x, 0x%x, 0x%x\n",
+               blurb(), ssi->real_screen_number, ssi->number,
+               (unsigned int) RootWindowOfScreen (si->screens[i].screen),
+               (unsigned int) si->screens[i].real_vroot,
+               (unsigned int) si->screens[i].screensaver_window);
+    }

 
   fprintf (real_stderr, "\n"
           "#######################################"
 
   fprintf (real_stderr, "\n"
           "#######################################"


@@ -338,7 +343,8 @@ saver_ehandler (Display *dpy, XErrorEvent *error)
    "    bug.  That will cause xscreensaver to dump a `core' file to the\n"
    "    current directory.  Please include the stack trace from that core\n"
    "    file in your bug report.  *DO NOT* mail the core file itself!\n"
    "    bug.  That will cause xscreensaver to dump a `core' file to the\n"
    "    current directory.  Please include the stack trace from that core\n"
    "    file in your bug report.  *DO NOT* mail the core file itself!\n"

-   "    That won't work.\n"
+   "    That won't work.\n");
+          fprintf (real_stderr,

    "\n"
    "    http://www.jwz.org/xscreensaver/bugs.html explains how to create\n"
    "    the most useful bug reports, and how to examine core files.\n"
    "\n"
    "    http://www.jwz.org/xscreensaver/bugs.html explains how to create\n"
    "    the most useful bug reports, and how to examine core files.\n"


@@ -679,14 +685,15 @@ print_banner (saver_info *si)
      whether to print the banner (and so that the banner gets printed before
      any resource-database-related error messages.)
    */
      whether to print the banner (and so that the banner gets printed before
      any resource-database-related error messages.)
    */

-  p->verbose_p = (p->debug_p || get_boolean_resource ("verbose", "Boolean"));
+  p->verbose_p = (p->debug_p || 
+                  get_boolean_resource (si->dpy, "verbose", "Boolean"));

 
   /* Ditto, for the locking_disabled_p message. */
 
   /* Ditto, for the locking_disabled_p message. */

-  p->lock_p = get_boolean_resource ("lock", "Boolean");
+  p->lock_p = get_boolean_resource (si->dpy, "lock", "Boolean");

 
   if (p->verbose_p)
     fprintf (stderr,
 
   if (p->verbose_p)
     fprintf (stderr,

-            "%s %s, copyright (c) 1991-2002 "
+            "%s %s, copyright (c) 1991-2008 "

             "by Jamie Zawinski <jwz@jwz.org>.\n",
             progname, si->version);
 
             "by Jamie Zawinski <jwz@jwz.org>.\n",
             progname, si->version);
 


@@ -748,6 +755,111 @@ print_lock_failure_banner (saver_info *si)
 }
 
 
 }
 
 

+#ifdef HAVE_XINERAMA
+
+static Bool
+screens_overlap_p (XineramaScreenInfo *a, XineramaScreenInfo *b)
+{
+  /* Two rectangles overlap if the max of the tops is less than the
+     min of the bottoms and the max of the lefts is less than the min
+     of the rights.
+   */
+# undef MAX
+# undef MIN
+# define MAX(A,B) ((A)>(B)?(A):(B))
+# define MIN(A,B) ((A)<(B)?(A):(B))
+
+  int maxleft  = MAX(a->x_org, b->x_org);
+  int maxtop   = MAX(a->y_org, b->y_org);
+  int minright = MIN(a->x_org + a->width  - 1, b->x_org + b->width);
+  int minbot   = MIN(a->y_org + a->height - 1, b->y_org + b->height);
+  return (maxtop < minbot && maxleft < minright);
+}
+
+
+/* Go through the list of Xinerama screen descriptions, and mark the
+   ones that appear to be insane, so that we don't use them.
+ */
+static void
+check_xinerama_sanity (int count, Bool verbose_p, XineramaScreenInfo *xsi)
+{
+  static Bool printed_p = False;
+  int i, j;
+  char err[1024];
+  *err = 0;
+
+# define X1 xsi[i].x_org
+# define X2 xsi[j].x_org
+# define Y1 xsi[i].y_org
+# define Y2 xsi[j].y_org
+# define W1 xsi[i].width
+# define W2 xsi[j].width
+# define H1 xsi[i].height
+# define H2 xsi[j].height
+
+# define WHINE() do {                                                        \
+    if (verbose_p) {                                                         \
+      if (! printed_p) {                                                     \
+        fprintf (stderr, "%s: compensating for Xinerama braindamage:\n",     \
+                 blurb());                                                   \
+        printed_p = True;                                                    \
+      }                                                                      \
+      fprintf (stderr, "%s:   %d: %s\n", blurb(), xsi[i].screen_number,err); \
+    }                                                                        \
+    xsi[i].screen_number = -1;                                               \
+  } while(0)
+
+  /* If a screen is enclosed by any other screen, that's insane.
+   */
+  for (i = 0; i < count; i++)
+    for (j = 0; j < count; j++)
+      if (i != j &&
+          xsi[i].screen_number >= 0 &&
+          xsi[j].screen_number >= 0 &&
+          X1 >= X2 && Y1 >= Y2 && (X1+W1) <= (X2+W2) && (X1+H1) <= (X2+H2))
+        {
+          sprintf (err, "%dx%d+%d+%d enclosed by %dx%d+%d+%d",
+                   W1, H1, X1, Y1,
+                   W2, H2, X2, Y2);
+          WHINE();
+          continue;
+        }
+
+  /* After checking for enclosure, check for other lossage against earlier
+     screens.  We do enclosure first so that we make sure to pick the
+     larger one.
+   */
+  for (i = 0; i < count; i++)
+    for (j = 0; j < i; j++)
+      {
+        if (xsi[i].screen_number < 0) continue; /* already marked */
+
+        *err = 0;
+        if (X1 == X2 && Y1 == Y2 && W1 == W2 && H1 == H2)
+          sprintf (err, "%dx%d+%d+%d duplicated", W1, H1, X1, Y1);
+
+        else if (screens_overlap_p (&xsi[i], &xsi[j]))
+          sprintf (err, "%dx%d+%d+%d overlaps %dx%d+%d+%d",
+                   W1, H1, X1, Y1,
+                   W2, H2, X2, Y2);
+
+        if (*err) WHINE();
+      }
+
+# undef X1
+# undef X2
+# undef Y1
+# undef Y2
+# undef W1
+# undef W2
+# undef H1
+# undef H2
+}
+
+#endif /* HAVE_XINERAMA */
+
+
+

 /* Examine all of the display's screens, and populate the `saver_screen_info'
    structures.  Make sure this is called after hack_environment() sets $PATH.
  */
 /* Examine all of the display's screens, and populate the `saver_screen_info'
    structures.  Make sure this is called after hack_environment() sets $PATH.
  */


@@ -757,18 +869,137 @@ initialize_per_screen_info (saver_info *si, Widget toplevel_shell)
   Bool found_any_writable_cells = False;
   int i;
 
   Bool found_any_writable_cells = False;
   int i;
 

-  si->nscreens = ScreenCount(si->dpy);
-  si->screens = (saver_screen_info *)
-    calloc(sizeof(saver_screen_info), si->nscreens);
+# ifdef HAVE_XINERAMA
+  {
+    int event, error;
+    si->xinerama_p = (XineramaQueryExtension (si->dpy, &event, &error) &&
+                      XineramaIsActive (si->dpy));
+  }
+
+  if (si->xinerama_p && ScreenCount (si->dpy) != 1)
+    {
+      si->xinerama_p = False;
+      if (si->prefs.verbose_p)
+       fprintf (stderr,
+                 "%s: Xinerama AND %d screens?  Disabling Xinerama support!\n",
+                 blurb(), ScreenCount(si->dpy));
+    }
+
+  if (si->xinerama_p)
+    {
+      int nscreens = 0;
+      XineramaScreenInfo *xsi = XineramaQueryScreens (si->dpy, &nscreens);
+      if (!xsi)
+        si->xinerama_p = False;
+      else
+        {
+          int j = 0;
+          si->screens = (saver_screen_info *)
+            calloc(sizeof(saver_screen_info), nscreens);
+          check_xinerama_sanity (nscreens, si->prefs.verbose_p, xsi);
+          for (i = 0; i < nscreens; i++)
+            {
+              if (xsi[i].screen_number < 0)  /* deemed insane */
+                continue;
+              si->screens[j].x      = xsi[i].x_org;
+              si->screens[j].y      = xsi[i].y_org;
+              si->screens[j].width  = xsi[i].width;
+              si->screens[j].height = xsi[i].height;
+              j++;
+            }
+          si->nscreens = j;
+          XFree (xsi);
+        }
+      si->default_screen = &si->screens[0];
+      si->default_screen->real_screen_p = True;
+    }
+# endif /* !HAVE_XINERAMA */
+
+  if (!si->xinerama_p)
+    {
+      si->nscreens = ScreenCount(si->dpy);
+      si->screens = (saver_screen_info *)
+        calloc(sizeof(saver_screen_info), si->nscreens);
+      si->default_screen = &si->screens[DefaultScreen(si->dpy)];
+
+      for (i = 0; i < si->nscreens; i++)
+        {
+          saver_screen_info *ssi = &si->screens[i];
+          ssi->width  = DisplayWidth  (si->dpy, i);
+          ssi->height = DisplayHeight (si->dpy, i);
+          ssi->real_screen_p = True;
+          ssi->real_screen_number = i;
+        }
+    }
+
+
+# ifdef QUAD_MODE
+  /* In "quad mode", we use the Xinerama code to pretend that there are 4
+     screens for every physical screen, and run four times as many hacks...
+   */
+  if (si->prefs.quad_p)
+    {
+      int ns2 = si->nscreens * 4;
+      saver_screen_info *ssi2 = (saver_screen_info *)
+        calloc(sizeof(saver_screen_info), ns2);
+
+      for (i = 0; i < si->nscreens; i++)
+        {
+          saver_screen_info *old = &si->screens[i];
+
+          if (si->prefs.debug_p) old->width = old->width / 2;
+
+          ssi2[i*4  ] = *old;
+          ssi2[i*4+1] = *old;
+          ssi2[i*4+2] = *old;
+          ssi2[i*4+3] = *old;
+
+          ssi2[i*4  ].width  /= 2;
+          ssi2[i*4  ].height /= 2;
+
+          ssi2[i*4+1].x      += ssi2[i*4  ].width;
+          ssi2[i*4+1].width  -= ssi2[i*4  ].width;
+          ssi2[i*4+1].height /= 2;
+
+          ssi2[i*4+2].y      += ssi2[i*4  ].height;
+          ssi2[i*4+2].width  /= 2;
+          ssi2[i*4+2].height -= ssi2[i*4  ].height;
+
+          ssi2[i*4+3].x      += ssi2[i*4+2].width;
+          ssi2[i*4+3].y      += ssi2[i*4+2].height;
+          ssi2[i*4+3].width  -= ssi2[i*4+2].width;
+          ssi2[i*4+3].height -= ssi2[i*4+2].height;
+
+          ssi2[i*4+1].real_screen_p = False;
+          ssi2[i*4+2].real_screen_p = False;
+          ssi2[i*4+3].real_screen_p = False;
+        }

 
 

-  si->default_screen = &si->screens[DefaultScreen(si->dpy)];
+      si->nscreens = ns2;
+      free (si->screens);
+      si->screens = ssi2;
+      si->default_screen = &si->screens[DefaultScreen(si->dpy) * 4];
+      si->xinerama_p = True;
+    }
+# endif /* QUAD_MODE */

 
 

+  /* finish initializing the screens.
+   */

   for (i = 0; i < si->nscreens; i++)
     {
       saver_screen_info *ssi = &si->screens[i];
       ssi->global = si;
   for (i = 0; i < si->nscreens; i++)
     {
       saver_screen_info *ssi = &si->screens[i];
       ssi->global = si;

-      ssi->screen = ScreenOfDisplay (si->dpy, i);
+

       ssi->number = i;
       ssi->number = i;

+      ssi->screen = ScreenOfDisplay (si->dpy, ssi->real_screen_number);
+      ssi->poll_mouse_last_root_x = -1;
+      ssi->poll_mouse_last_root_y = -1;
+
+      if (!si->xinerama_p)
+        {
+          ssi->width  = WidthOfScreen  (ssi->screen);
+          ssi->height = HeightOfScreen (ssi->screen);
+        }

 
       /* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */
       ssi->default_visual =
 
       /* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */
       ssi->default_visual =


@@ -792,7 +1023,7 @@ initialize_per_screen_info (saver_info *si, Widget toplevel_shell)
                              XtNvisual, ssi->current_visual,
                              XtNdepth,  visual_depth (ssi->screen,
                                                       ssi->current_visual),
                              XtNvisual, ssi->current_visual,
                              XtNdepth,  visual_depth (ssi->screen,
                                                       ssi->current_visual),

-                             0);
+                             NULL);

 
       if (! found_any_writable_cells)
        {
 
       if (! found_any_writable_cells)
        {


@@ -884,6 +1115,19 @@ initialize_server_extensions (saver_info *si)
                 blurb());
     }
 
                 blurb());
     }
 

+  /* These are incompatible (or at least, our support for them is...) */
+  if (si->xinerama_p && si->using_mit_saver_extension)
+    {
+      si->using_mit_saver_extension = False;
+      if (p->verbose_p)
+        fprintf (stderr, "%s: Xinerama in use: disabling MIT-SCREEN-SAVER.\n",
+                 blurb());
+    }
+
+#ifdef HAVE_RANDR
+  query_randr_extension (si);
+#endif
+

   if (!system_has_proc_interrupts_p)
     {
       si->using_proc_interrupts = False;
   if (!system_has_proc_interrupts_p)
     {
       si->using_proc_interrupts = False;


@@ -948,8 +1192,12 @@ select_events (saver_info *si)
      for window creation events, so that new subwindows will be noticed.
    */
   for (i = 0; i < si->nscreens; i++)
      for window creation events, so that new subwindows will be noticed.
    */
   for (i = 0; i < si->nscreens; i++)

-    start_notice_events_timer (si, RootWindowOfScreen (si->screens[i].screen),
-                               False);
+    {
+      saver_screen_info *ssi = &si->screens[i];
+      if (ssi->real_screen_p)
+        start_notice_events_timer (si,
+           RootWindowOfScreen (si->screens[i].screen), False);
+    }

 
   if (p->verbose_p)
     fprintf (stderr, " done.\n");
 
   if (p->verbose_p)
     fprintf (stderr, " done.\n");


@@ -966,7 +1214,7 @@ maybe_reload_init_file (saver_info *si)
        fprintf (stderr, "%s: file \"%s\" has changed, reloading.\n",
                 blurb(), init_file_name());
 
        fprintf (stderr, "%s: file \"%s\" has changed, reloading.\n",
                 blurb(), init_file_name());
 

-      load_init_file (p);
+      load_init_file (si->dpy, p);

 
       /* If a server extension is in use, and p->timeout has changed,
         we need to inform the server of the new timeout. */
 
       /* If a server extension is in use, and p->timeout has changed,
         we need to inform the server of the new timeout. */


@@ -1032,10 +1280,33 @@ main_loop (saver_info *si)
           /* Go around the loop and wait for the next bout of idleness,
              or for the init file to change, or for a remote command to
              come in, or something.
           /* Go around the loop and wait for the next bout of idleness,
              or for the init file to change, or for a remote command to
              come in, or something.

+
+             But, if locked_p is true, go ahead.  This can only happen
+             if we're in "disabled" mode but a "lock" clientmessage came
+             in: in that case, we should go ahead and blank/lock the screen.

            */
            */

-          continue;
+          if (!si->locked_p)
+            continue;
+        }
+
+      /* Since we're about to blank the screen, kill the de-race timer,
+         if any.  It might still be running if we have unblanked and then
+         re-blanked in a short period (e.g., when using the "next" button
+         in xscreensaver-demo.)
+       */
+      if (si->de_race_id)
+        {
+          if (p->verbose_p)
+            fprintf (stderr, "%s: stopping de-race timer (%d remaining.)\n",
+                     blurb(), si->de_race_ticks);
+          XtRemoveTimeOut (si->de_race_id);
+          si->de_race_id = 0;

         }
 
         }
 

+
+      /* Now, try to blank.
+       */
+

       if (! blank_screen (si))
         {
           /* We were unable to grab either the keyboard or mouse.
       if (! blank_screen (si))
         {
           /* We were unable to grab either the keyboard or mouse.


@@ -1046,13 +1317,29 @@ main_loop (saver_info *si)
              see any events, and the display would be wedged.
 
              So, just go around the loop again and wait for the
              see any events, and the display would be wedged.
 
              So, just go around the loop again and wait for the

-             next bout of idleness.
+             next bout of idleness.  (If the user remains idle, we
+             will next try to blank the screen again in no more than
+             60 seconds.)

           */
           */

+          Time retry = 60 * 1000;
+          if (p->timeout < retry)
+            retry = p->timeout;

 
 

-          fprintf (stderr,
+          if (p->debug_p)
+            {
+              fprintf (stderr,
+                  "%s: DEBUG MODE: unable to grab -- BLANKING ANYWAY.\n",
+                       blurb());
+            }
+          else
+            {
+              fprintf (stderr,

                   "%s: unable to grab keyboard or mouse!  Blanking aborted.\n",
                   "%s: unable to grab keyboard or mouse!  Blanking aborted.\n",

-                   blurb());
-          continue;
+                       blurb());
+
+              schedule_wakeup_event (si, retry, p->debug_p);
+              continue;
+            }

         }
 
       kill_screenhack (si);
         }
 
       kill_screenhack (si);


@@ -1194,52 +1481,10 @@ main_loop (saver_info *si)
          si->lock_id = 0;
        }
 
          si->lock_id = 0;
        }
 

-      /* It's possible that a race condition could have led to the saver
-         window being unexpectedly still mapped.  This can happen like so:
-
-          - screen is blanked
-          - hack is launched
-          - that hack tries to grab a screen image( it does this by
-            first unmapping the saver window, then remapping it.)
-          - hack unmaps window
-          - hack waits
-          - user becomes active
-          - hack re-maps window (*)
-          - driver kills subprocess
-          - driver unmaps window (**)
-
-         The race is that (*) might have been sent to the server before
-         the client process was killed, but, due to scheduling randomness,
-         might not have been received by the server until after (**).
-         In other words, (*) and (**) might happen out of order, meaning
-         the driver will unmap the window, and then after that, the
-         recently-dead client will re-map it.  This leaves the user
-         locked out (it looks like a desktop, but it's not!)
-
-         To avoid this: after un-blanking the screen, sleep for a second,
-         and then really make sure the window is unmapped.
-       */
-      {
-        int i;
-        XSync (si->dpy, False);
-        sleep (1);
-        for (i = 0; i < si->nscreens; i++)
-          {
-            saver_screen_info *ssi = &si->screens[i];
-            Window w = ssi->screensaver_window;
-            XWindowAttributes xgwa;
-            XGetWindowAttributes (si->dpy, w, &xgwa);
-            if (xgwa.map_state != IsUnmapped)
-              {
-                if (p->verbose_p)
-                  fprintf (stderr,
-                           "%s: %d: client race! emergency unmap 0x%lx.\n",
-                           blurb(), i, (unsigned long) w);
-                XUnmapWindow (si->dpy, w);
-              }
-          }
-        XSync (si->dpy, False);
-      }
+      /* Since we're unblanked now, break race conditions and make
+         sure we stay that way (see comment in timers.c.) */
+      if (! si->de_race_id)
+        de_race_timer ((XtPointer) si, 0);

     }
 }
 
     }
 }
 


@@ -1253,6 +1498,7 @@ main (int argc, char **argv)
   saver_info the_si;
   saver_info *si = &the_si;
   saver_preferences *p = &si->prefs;
   saver_info the_si;
   saver_info *si = &the_si;
   saver_preferences *p = &si->prefs;

+  struct passwd *spasswd;

   int i;
 
   memset(si, 0, sizeof(*si));
   int i;
 
   memset(si, 0, sizeof(*si));


@@ -1268,15 +1514,29 @@ main (int argc, char **argv)
   privileged_initialization (si, &argc, argv);
   hack_environment (si);
 
   privileged_initialization (si, &argc, argv);
   hack_environment (si);
 

+  spasswd = getpwuid(getuid());
+  if (!spasswd)
+    {
+      fprintf(stderr, "Could not figure out who the current user is!\n");
+      return 1;
+    }
+
+  si->user = strdup(spasswd->pw_name ? spasswd->pw_name : "(unknown)");
+
+# ifndef NO_LOCKING
+  si->unlock_cb = gui_auth_conv;
+  si->auth_finished_cb = auth_finished_cb;
+# endif /* !NO_LOCKING */
+

   shell = connect_to_server (si, &argc, argv);
   process_command_line (si, &argc, argv);
   print_banner (si);
 
   shell = connect_to_server (si, &argc, argv);
   process_command_line (si, &argc, argv);
   print_banner (si);
 

-  load_init_file (p);  /* must be before initialize_per_screen_info() */
+  load_init_file(si->dpy, p); /* must be before initialize_per_screen_info() */

   blurb_timestamp_p = p->timestamp_p;  /* kludge */
   initialize_per_screen_info (si, shell); /* also sets si->fading_possible_p */
 
   blurb_timestamp_p = p->timestamp_p;  /* kludge */
   initialize_per_screen_info (si, shell); /* also sets si->fading_possible_p */
 

-  /* We can only issue this warnings now. */
+  /* We can only issue this warning now. */

   if (p->verbose_p && !si->fading_possible_p && (p->fade_p || p->unfade_p))
     fprintf (stderr,
              "%s: there are no PseudoColor or GrayScale visuals.\n"
   if (p->verbose_p && !si->fading_possible_p && (p->fade_p || p->unfade_p))
     fprintf (stderr,
              "%s: there are no PseudoColor or GrayScale visuals.\n"


@@ -1284,8 +1544,12 @@ main (int argc, char **argv)
              blurb(), blurb());
 
   for (i = 0; i < si->nscreens; i++)
              blurb(), blurb());
 
   for (i = 0; i < si->nscreens; i++)

-    if (ensure_no_screensaver_running (si->dpy, si->screens[i].screen))
-      exit (1);
+    {
+      saver_screen_info *ssi = &si->screens[i];
+      if (ssi->real_screen_p)
+        if (ensure_no_screensaver_running (si->dpy, si->screens[i].screen))
+          exit (1);
+    }

 
   lock_initialization (si, &argc, argv);
   print_lock_failure_banner (si);
 
   lock_initialization (si, &argc, argv);
   print_lock_failure_banner (si);


@@ -1437,10 +1701,23 @@ clientmessage_response (saver_info *si, Window w, Bool error,
 static void
 bogus_clientmessage_warning (saver_info *si, XEvent *event)
 {
 static void
 bogus_clientmessage_warning (saver_info *si, XEvent *event)
 {

+#if 0  /* Oh, fuck it.  GNOME likes to spew random ClientMessages at us
+          all the time.  This is presumably indicative of an error in
+          the sender of that ClientMessage: if we're getting it and 
+          ignoring it, then it's not reaching the intended recipient.
+          But people complain to me about this all the time ("waaah!
+          xscreensaver is printing to it's stderr and that gets my
+          panties all in a bunch!")  And I'm sick of hearing about it.
+          So we'll just ignore these messages and let GNOME go right
+          ahead and continue to stumble along in its malfunction.
+        */
+
+  saver_preferences *p = &si->prefs;

   char *str = XGetAtomName_safe (si->dpy, event->xclient.message_type);
   Window w = event->xclient.window;
   char wdesc[255];
   int screen = 0;
   char *str = XGetAtomName_safe (si->dpy, event->xclient.message_type);
   Window w = event->xclient.window;
   char wdesc[255];
   int screen = 0;

+  Bool root_p = False;

 
   *wdesc = 0;
   for (screen = 0; screen < si->nscreens; screen++)
 
   *wdesc = 0;
   for (screen = 0; screen < si->nscreens; screen++)


@@ -1452,9 +1729,19 @@ bogus_clientmessage_warning (saver_info *si, XEvent *event)
     else if (w == RootWindow (si->dpy, screen))
       {
         strcpy (wdesc, "root");
     else if (w == RootWindow (si->dpy, screen))
       {
         strcpy (wdesc, "root");

+        root_p = True;

         break;
       }
 
         break;
       }
 

+  /* If this ClientMessage was sent to the real root window instead of to the
+     xscreensaver window, then it might be intended for someone else who is
+     listening on the root window (e.g., the window manager).  So only print
+     the warning if: we are in debug mode; or if the bogus message was
+     actually sent to one of the xscreensaver-created windows.
+   */
+  if (root_p && !p->debug_p)
+    return;
+

   if (!*wdesc)
     {
       XErrorHandler old_handler;
   if (!*wdesc)
     {
       XErrorHandler old_handler;


@@ -1485,8 +1772,11 @@ bogus_clientmessage_warning (saver_info *si, XEvent *event)
   fprintf (stderr, "%s: %d: for window 0x%lx (%s)\n",
            blurb(), screen, (unsigned long) w, wdesc);
   if (str) XFree (str);
   fprintf (stderr, "%s: %d: for window 0x%lx (%s)\n",
            blurb(), screen, (unsigned long) w, wdesc);
   if (str) XFree (str);

+
+#endif /* 0 */

 }
 
 }
 

+

 Bool
 handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
 {
 Bool
 handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
 {


@@ -1509,6 +1799,14 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
     {
       if (until_idle_p)
        {
     {
       if (until_idle_p)
        {

+          if (p->mode == DONT_BLANK)
+            {
+              clientmessage_response(si, window, True,
+                         "ACTIVATE ClientMessage received in DONT_BLANK mode.",
+                                     "screen blanking is currently disabled.");
+              return False;
+            }
+

          clientmessage_response(si, window, False,
                                 "ACTIVATE ClientMessage received.",
                                 "activating.");
          clientmessage_response(si, window, False,
                                 "ACTIVATE ClientMessage received.",
                                 "activating.");


@@ -1613,6 +1911,14 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
       char buf2 [255];
       long which = event->xclient.data.l[1];
 
       char buf2 [255];
       long which = event->xclient.data.l[1];
 

+      if (p->mode == DONT_BLANK)
+        {
+          clientmessage_response(si, window, True,
+                           "SELECT ClientMessage received in DONT_BLANK mode.",
+                                 "screen blanking is currently disabled.");
+          return False;
+        }
+

       sprintf (buf, "SELECT %ld ClientMessage received.", which);
       sprintf (buf2, "activating (%ld).", which);
       clientmessage_response (si, window, False, buf, buf2);
       sprintf (buf, "SELECT %ld ClientMessage received.", which);
       sprintf (buf2, "activating (%ld).", which);
       clientmessage_response (si, window, False, buf, buf2);


@@ -1684,7 +1990,7 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
   else if (type == XA_DEMO)
     {
       long arg = event->xclient.data.l[1];
   else if (type == XA_DEMO)
     {
       long arg = event->xclient.data.l[1];

-      Bool demo_one_hack_p = (arg == 300);
+      Bool demo_one_hack_p = (arg == 5000);

 
       if (demo_one_hack_p)
        {
 
       if (demo_one_hack_p)
        {


@@ -1776,6 +2082,12 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
     }
   else if (type == XA_THROTTLE)
     {
     }
   else if (type == XA_THROTTLE)
     {

+      /* The THROTTLE command is deprecated -- it predates the XDPMS
+         extension.  Instead of using -throttle, users should instead
+         just power off the monitor (e.g., "xset dpms force off".)
+         In a few minutes, xscreensaver will notice that the monitor
+         is off, and cease running hacks.
+       */

       if (si->throttled_p)
        clientmessage_response (si, window, True,
                                 "THROTTLE ClientMessage received, but "
       if (si->throttled_p)
        clientmessage_response (si, window, True,
                                 "THROTTLE ClientMessage received, but "


@@ -1931,16 +2243,28 @@ analyze_display (saver_info *si)
         False
 #     endif
    }, { "XINERAMA",                             "Xinerama",
         False
 #     endif
    }, { "XINERAMA",                             "Xinerama",

+#     ifdef HAVE_XINERAMA
+        True
+#     else
+        False
+#     endif
+   }, { "RANDR",                                "Resize-and-Rotate",
+#     ifdef HAVE_RANDR

         True
         True

+#     else
+        False
+#     endif

    }, { "Apple-DRI",                            "Apple-DRI (XDarwin)",
         True
    },
   };
 
    }, { "Apple-DRI",                            "Apple-DRI (XDarwin)",
         True
    },
   };
 

-  fprintf (stderr, "%s: running on display \"%s\" (%d screen%s).\n",
+  fprintf (stderr, "%s: running on display \"%s\" (%d %sscreen%s).\n",

            blurb(),
           DisplayString(si->dpy),
            blurb(),
           DisplayString(si->dpy),

-           si->nscreens, (si->nscreens == 1 ? "" : "s"));
+           si->nscreens,
+           (si->xinerama_p ? "Xinerama " : ""),
+           (si->nscreens == 1 ? "" : "s"));

   fprintf (stderr, "%s: vendor is %s, %d.\n", blurb(),
           ServerVendor(si->dpy), VendorRelease(si->dpy));
 
   fprintf (stderr, "%s: vendor is %s, %d.\n", blurb(),
           ServerVendor(si->dpy), VendorRelease(si->dpy));
 


@@ -1956,21 +2280,21 @@ analyze_display (saver_info *si)
       j = strlen (buf);
       strcat (buf, exts[i].desc);
       if (!exts[i].useful_p)
       j = strlen (buf);
       strcat (buf, exts[i].desc);
       if (!exts[i].useful_p)

-        {
-          int k = j + 18;
-          while (strlen (buf) < k) strcat (buf, " ");
-          strcat (buf, "<-- not supported at compile time!");
-        }
+        strcat (buf, " (disabled at compile time)");

       fprintf (stderr, "%s\n", buf);
     }
 
   for (i = 0; i < si->nscreens; i++)
     {
       fprintf (stderr, "%s\n", buf);
     }
 
   for (i = 0; i < si->nscreens; i++)
     {

+      saver_screen_info *ssi = &si->screens[i];

       unsigned long colormapped_depths = 0;
       unsigned long non_mapped_depths = 0;
       XVisualInfo vi_in, *vi_out;
       int out_count;
       unsigned long colormapped_depths = 0;
       unsigned long non_mapped_depths = 0;
       XVisualInfo vi_in, *vi_out;
       int out_count;

-      vi_in.screen = i;
+
+      if (!ssi->real_screen_p) continue;
+
+      vi_in.screen = ssi->real_screen_number;

       vi_out = XGetVisualInfo (si->dpy, VisualScreenMask, &vi_in, &out_count);
       if (!vi_out) continue;
       for (j = 0; j < out_count; j++)
       vi_out = XGetVisualInfo (si->dpy, VisualScreenMask, &vi_in, &out_count);
       if (!vi_out) continue;
       for (j = 0; j < out_count; j++)


@@ -1982,7 +2306,8 @@ analyze_display (saver_info *si)
 
       if (colormapped_depths)
        {
 
       if (colormapped_depths)
        {

-         fprintf (stderr, "%s: screen %d colormapped depths:", blurb(), i);
+         fprintf (stderr, "%s: screen %d colormapped depths:", blurb(),
+                   ssi->real_screen_number);

          for (j = 0; j < 32; j++)
            if (colormapped_depths & (1 << j))
              fprintf (stderr, " %d", j);
          for (j = 0; j < 32; j++)
            if (colormapped_depths & (1 << j))
              fprintf (stderr, " %d", j);


@@ -1991,13 +2316,27 @@ analyze_display (saver_info *si)
       if (non_mapped_depths)
        {
          fprintf (stderr, "%s: screen %d non-colormapped depths:",
       if (non_mapped_depths)
        {
          fprintf (stderr, "%s: screen %d non-colormapped depths:",

-                   blurb(), i);
+                   blurb(), ssi->real_screen_number);

          for (j = 0; j < 32; j++)
            if (non_mapped_depths & (1 << j))
              fprintf (stderr, " %d", j);
          fprintf (stderr, ".\n");
        }
     }
          for (j = 0; j < 32; j++)
            if (non_mapped_depths & (1 << j))
              fprintf (stderr, " %d", j);
          fprintf (stderr, ".\n");
        }
     }

+
+  if (si->xinerama_p)
+    {
+      fprintf (stderr, "%s: Xinerama layout:\n", blurb());
+      for (i = 0; i < si->nscreens; i++)
+        {
+          saver_screen_info *ssi = &si->screens[i];
+          fprintf (stderr, "%s:   %c %d/%d: %dx%d+%d+%d\n",
+                   blurb(),
+                   (ssi->real_screen_p ? '+' : ' '),
+                   ssi->number, ssi->real_screen_number,
+                   ssi->width, ssi->height, ssi->x, ssi->y);
+        }
+    }

 }
 
 Bool
 }
 
 Bool


@@ -2019,6 +2358,8 @@ display_is_on_console_p (saver_info *si)
        not_on_console = False;
       else if (gethostname (localname, sizeof (localname)))
        not_on_console = True;  /* can't find hostname? */
        not_on_console = False;
       else if (gethostname (localname, sizeof (localname)))
        not_on_console = True;  /* can't find hostname? */

+      else if (!strncmp (dpyname, "/tmp/launch-", 12))  /* MacOS X launchd */
+       not_on_console = False;

       else
        {
          /* We have to call gethostbyname() on the result of gethostname()
       else
        {
          /* We have to call gethostbyname() on the result of gethostname()


@@ -2053,7 +2394,7 @@ display_is_on_console_p (saver_info *si)
 void
 check_for_leaks (const char *where)
 {
 void
 check_for_leaks (const char *where)
 {

-#ifdef HAVE_SBRK
+#if defined(HAVE_SBRK) && defined(LEAK_PARANOIA)

   static unsigned long last_brk = 0;
   int b = (unsigned long) sbrk(0);
   if (last_brk && last_brk < b)
   static unsigned long last_brk = 0;
   int b = (unsigned long) sbrk(0);
   if (last_brk && last_brk < b)