+// search forward from start, return the last client before end
+Client*
+prev_tiled (Client *start, Client *end) {
+ Client *w, *n;
+ for (w = start; w && (n = nexttiled(w->next)); w = n) {
+ if (n == end) {
+ return w;
+ }
+ }
+ return NULL;
+}
+
+// return the window to show on the right side
+Client*
+choose_slave (Client *master, Client *focused) {
+ if (!master) {
+ return NULL;
+ }
+ if (focused) {
+ // FIXME put this same algorithm in update_window_opacities
+ if (focused->isfloating) {
+ // show the window just "under" it
+ Client *prev = prev_tiled(master, focused);
+ // fall back to the first slave
+ if (prev && prev != master) {
+ return prev;
+ } else {
+ return nexttiled(master->next);
+ }
+ } else {
+ // focused window is tiled
+ if (focused == master) {
+ // master is focused, show first slave
+ return nexttiled(master->next);
+ } else {
+ // focused window is a slave, so show that one
+ return focused;
+ }
+ }
+ }
+ // maybe we get called when there's no focused?
+ return nexttiled(master->next);
+}
+
+#define GUTTER_PX 4
+
+void
+jason_layout(Monitor *m) {
+ Client *c, *master, *slave, *focused, *base = 0;
+ unsigned int master_width, slave_width, slave_left;
+
+ // find master
+ master = nexttiled(m->clients);
+
+ // no master? nothing to do
+ if (!master) {
+ return;
+ }
+
+ // find focused and slave
+ focused = (m->sel && ISVISIBLE(m->sel)) ? m->sel : NULL;
+ slave = choose_slave(master, focused);
+
+ // calculate window widths
+ if (!slave && master->screen_hog) {
+ master_width = m->ww;
+ } else {
+ master_width = m->ww * m->mfact - GUTTER_PX / 2;
+ }
+ slave_left = m->ww * m->mfact + GUTTER_PX / 2;
+ slave_width = m->ww * (1 - m->mfact) - GUTTER_PX / 2;
+
+ // resize/reposition master
+ resize(master,
+ m->wx,
+ m->wy,
+ master_width,
+ m->wh,
+ False,
+ 0
+ );
+ // resize/reposition slaves
+ base = master; // window to be above in the stacking order
+ for (c = nexttiled(master->next); c; c = nexttiled(c->next)) {
+ resize(c,
+ slave_left,
+ c == slave ? m->wy : m->wy - m->wh,
+ slave_width,
+ m->wh,
+ False,
+ base
+ );
+ base = c;
+ }
+}
+