Three Column Layout

dwm.c

@@ -258,6 +258,7 @@ static Client *swallowingclient(Window w);
 static Monitor *systraytomon(Monitor *m);
 static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
+static void tcl(Monitor * m);
 static Client *termforwin(const Client *c);
 static void tile(Monitor *m);
 static void togglebar(const Arg *arg);
@@ -2068,6 +2069,80 @@ col(Monitor *m) {
 	}
 }
 
+void
+tcl(Monitor * m) {
+    int x, y, h, w, mw, sw, bdw;
+    unsigned int i, n;
+    Client * c;
+
+    for (n = 0, c = nexttiled(m->clients); c;
+         c = nexttiled(c->next), n++);
+
+    if (n == 0)
+        return;
+
+    c = nexttiled(m->clients);
+
+    mw = m->mfact * m->ww;
+    sw = (m->ww - mw) / 2;
+    bdw = (2 * c->bw);
+    resize(c,
+           n < 3 ? m->wx : m->wx + sw,
+           m->wy,
+           n == 1 ? m->ww - bdw : mw - bdw,
+           m->wh - bdw,
+           False);
+
+    if (--n == 0)
+        return;
+
+    w = (m->ww - mw) / ((n > 1) + 1);
+    c = nexttiled(c->next);
+
+    if (n > 1)
+    {
+        x = m->wx + ((n > 1) ? mw + sw : mw);
+        y = m->wy;
+        h = m->wh / (n / 2);
+
+        if (h < bh)
+            h = m->wh;
+
+        for (i = 0; c && i < n / 2; c = nexttiled(c->next), i++)
+        {
+            resize(c,
+                   x,
+                   y,
+                   w - bdw,
+                   (i + 1 == n / 2) ? m->wy + m->wh - y - bdw : h - bdw,
+                   False);
+
+            if (h != m->wh)
+                y = c->y + HEIGHT(c);
+        }
+    }
+
+    x = (n + 1 / 2) == 1 ? mw : m->wx;
+    y = m->wy;
+    h = m->wh / ((n + 1) / 2);
+
+    if (h < bh)
+        h = m->wh;
+
+    for (i = 0; c; c = nexttiled(c->next), i++)
+    {
+        resize(c,
+               x,
+               y,
+               (i + 1 == (n + 1) / 2) ? w - bdw : w - bdw,
+               (i + 1 == (n + 1) / 2) ? m->wy + m->wh - y - bdw : h - bdw,
+               False);
+
+        if (h != m->wh)
+            y = c->y + HEIGHT(c);
+    }
+}
+
 void
 togglebar(const Arg *arg)
 {