applied Markus' tagset purge of alternative view on _NET_ACTIVE_WINDOW event

dwm.c

@@ -153,7 +153,6 @@ static void buttonpress(XEvent *e);
 static void checkotherwm(void);
 static void cleanup(void);
 static void cleanupmon(Monitor *mon);
-static void clearurgent(Client *c);
 static void clientmessage(XEvent *e);
 static void configure(Client *c);
 static void configurenotify(XEvent *e);
@@ -204,6 +203,7 @@ static void setfullscreen(Client *c, int fullscreen);
 static void setlayout(const Arg *arg);
 static void setmfact(const Arg *arg);
 static void setup(void);
+static void seturgent(Client *c, int urg);
 static void showhide(Client *c);
 static void sigchld(int unused);
 static void spawn(const Arg *arg);
@@ -508,19 +508,6 @@ cleanupmon(Monitor *mon)
 	free(mon);
 }
 
-void
-clearurgent(Client *c)
-{
-	XWMHints *wmh;
-
-	c->isurgent = 0;
-	if (!(wmh = XGetWMHints(dpy, c->win)))
-		return;
-	wmh->flags &= ~XUrgencyHint;
-	XSetWMHints(dpy, c->win, wmh);
-	XFree(wmh);
-}
-
 void
 clientmessage(XEvent *e)
 {
@@ -534,11 +521,8 @@ clientmessage(XEvent *e)
 			setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 			              || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 	} else if (cme->message_type == netatom[NetActiveWindow]) {
-		if (!ISVISIBLE(c)) {
-			c->mon->seltags ^= 1;
-			c->mon->tagset[c->mon->seltags] = c->tags;
-		}
-		pop(c);
+		if (c != selmon->sel && !c->isurgent)
+			seturgent(c, 1);
 	}
 }
 
@@ -806,7 +790,7 @@ focus(Client *c)
 		if (c->mon != selmon)
 			selmon = c->mon;
 		if (c->isurgent)
-			clearurgent(c);
+			seturgent(c, 0);
 		detachstack(c);
 		attachstack(c);
 		grabbuttons(c, 1);
@@ -1616,6 +1600,20 @@ setup(void)
 	focus(NULL);
 }
 
+
+void
+seturgent(Client *c, int urg)
+{
+	XWMHints *wmh;
+
+	c->isurgent = urg;
+	if (!(wmh = XGetWMHints(dpy, c->win)))
+		return;
+	wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
+	XSetWMHints(dpy, c->win, wmh);
+	XFree(wmh);
+}
+
 void
 showhide(Client *c)
 {