Fix focus stealing for changing desktops/Use timestamp for user input events

Change the logic for when to allow stealing focus across desktops.
- It was possible to call event_time_after() with a CurrentTime in the old code.
- It would disallow a user requested change which is crazy.
- It would change desktops on you when a new window appeared but this is
  generally not desirable.

event_source_time() is supposed to give the time which the user made things
happen. we leave it at 0 for user-input events right now which means stuff like
changing desktop doesn't save any timestamp at all.  we should use the
timestamp from x for user-generated events.

openbox/client.c

@@ -717,11 +717,13 @@ static gboolean client_can_steal_focus(ObClient *self,
     /* This is focus stealing prevention */
     ob_debug("Want to focus window 0x%x at time %u "
              "launched at %u (last user interaction time %u) "
-             "request from %s, allow other desktop: %s",
+             "request from %s, allow other desktop: %s, "
+             "desktop switch time %u",
              self->window, steal_time, launch_time,
              event_last_user_time,
              (request_from_user ? "user" : "other"),
-             (allow_other_desktop ? "yes" : "no"));
+             (allow_other_desktop ? "yes" : "no"),
+             screen_desktop_user_time);
 
     /*
       if no launch time is provided for an application, make one up.
@@ -777,18 +779,24 @@ static gboolean client_can_steal_focus(ObClient *self,
     }
 
     /* if it's on another desktop
-       then if allow_other_desktop is true, we don't want to let it steal
+       and if allow_other_desktop is true, we generally let it steal focus.
+       but if it didn't come from the user, don't let it steal unless it was
+       launched before the user switched desktops.
        focus, unless it was launched after we changed desktops and the request
        came from the user
      */
-    if (!(self->desktop == screen_desktop ||
+    if (!screen_compare_desktops(screen_desktop, self->desktop)) {
-          self->desktop == DESKTOP_ALL) &&
+        /* must be allowed */
-        (!allow_other_desktop ||
+        if (!allow_other_desktop) {
-         (request_from_user && screen_desktop_user_time &&
+            steal = FALSE;
-          !event_time_after(launch_time, screen_desktop_user_time))))
+            ob_debug("Not focusing the window because its on another desktop");
-    {
+        }
-        steal = FALSE;
+        /* if we don't know when the desktop changed, but request is from an
-        ob_debug("Not focusing the window because its on another desktop\n");
+           application, don't let it change desktop on you */
+        else if (!request_from_user) {
+            steal = FALSE;
+            ob_debug("Not focusing the window because non-user request");
+        }
     }
     /* If something is focused... */
     else if (focus_client) {

openbox/event.c

@@ -700,6 +700,8 @@ static void event_process(const XEvent *ec, gpointer data)
         static guint pressed = 0;
         static Window pressed_win = None;
 
+        event_sourcetime = event_curtime;
+
         /* If the button press was on some non-root window, or was physically
            on the root window... */
         if (window != obt_root(ob_screen) ||
@@ -726,6 +728,8 @@ static void event_process(const XEvent *ec, gpointer data)
     else if (e->type == KeyPress || e->type == KeyRelease ||
              e->type == MotionNotify)
     {
+        event_sourcetime = event_curtime;
+
         used = event_handle_user_input(client, e);
 
         if (prompt && !used)