shiftview.diff

diff --git a/dwm.c b/dwm.c
index 39055b1..ab96525 100644
--- a/dwm.c
+++ b/dwm.c
@@ -212,6 +212,7 @@ static void setmfact(const Arg *arg);
 static void setup(void);
 static void seturgent(Client *c, int urg);
 static void showhide(Client *c);
+static void shiftview(const Arg *arg);
 static void sigchld(int unused);
 static void spawn(const Arg *arg);
 static void tag(const Arg *arg);
@@ -1738,6 +1739,21 @@ showhide(Client *c)
 	}
 }
 
+void
+shiftview(const Arg *arg) {
+	Arg shifted;
+
+	if(arg->i > 0) // left circular shift
+		shifted.ui = (selmon->tagset[selmon->seltags] << arg->i)
+		   | (selmon->tagset[selmon->seltags] >> (LENGTH(tags) - arg->i));
+
+	else // right circular shift
+		shifted.ui = selmon->tagset[selmon->seltags] >> (- arg->i)
+		   | selmon->tagset[selmon->seltags] << (LENGTH(tags) + arg->i);
+
+	view(&shifted);
+}
+
 void
 sigchld(int unused)
 {