[PATCH:xev] Add -root option to specify monitoring root window events.

[Kim Woelders]

Signed-off-by: Kim Woelders <kim at woelders.dk>

diff --git a/xev.c b/xev.c
index 16d45aa..b422aa2 100644
--- a/xev.c
+++ b/xev.c
@@ -690,6 +690,7 @@ usage (void)
 "    -bw pixels                          border width in pixels",
 "    -bs {NotUseful,WhenMapped,Always}   backingstore attribute",
 "    -id windowid                        use existing window",
+"    -root                               use root window",
 "    -s                                  set save-unders attribute",
 "    -name string                        window name",
 "    -rv                                 reverse video",
@@ -739,6 +740,7 @@ main (int argc, char **argv)
     int done;
     char *name = "Event Tester";
     Bool reverse = False;
+    Bool use_root = False;
     unsigned long back, fore;
     XIM xim;
     XIMStyles *xim_styles;
@@ -793,8 +795,17 @@ main (int argc, char **argv)
 		if (++i >= argc) usage ();
 		name = argv[i];
 		continue;
-	      case 'r':			/* -rv */
-		reverse = True;
+	      case 'r':
+		switch (arg[2]) {
+		  case 'o':		/* -root */
+		    use_root = True;
+		    continue;
+		  case 'v':		/* -rv */
+		    reverse = True;
+		    continue;
+		  default:
+		    usage ();
+		}
 		continue;
 	      case 's':			/* -s */
 		attr.save_under = True;
@@ -865,6 +876,9 @@ main (int argc, char **argv)
 			   FocusChangeMask | PropertyChangeMask |
 			   ColormapChangeMask | OwnerGrabButtonMask;
 
+    if (use_root)
+	w = RootWindow(dpy, screen);
+
     if (w) {
 	XGetWindowAttributes(dpy, w, &wattr);
 	if (wattr.all_event_masks & ButtonPressMask)
diff --git a/xev.man b/xev.man
index dcb1e3a..136a01a 100644
--- a/xev.man
+++ b/xev.man
@@ -9,7 +9,7 @@ xev - print contents of X events
 .B "xev"
 [\-display \fIdisplayname\fP] [\-geometry \fIgeom\fP]
 [\-bw \fIpixels\fP] [\-bs \fI{NotUseful,WhenMapped,Always}\fP]
-[\-id \fIwindowid\fP] [\-s] [\-name \fIstring\fP] [\-rv]
+[\-id \fIwindowid\fP] [\-root] [\-s] [\-name \fIstring\fP] [\-rv]
 .SH DESCRIPTION
 .PP
 \fIXev\fP creates a window and then asks the X server to send it
@@ -40,6 +40,10 @@ means that the xev process will redraw its contents itself, as necessary.
 This option specifies that the window with the given id should be
 monitored, instead of creating a new window.
 .TP 8
+.B \-root
+This option specifies that the root window should be
+monitored, instead of creating a new window.
+.TP 8
 .B \-s
 This option specifies that save-unders should be enabled on the window. Save
 unders are similar to backing store, but they refer rather to the saving of
-- 
1.6.6