+
+/* this be mostly ripped from fvwm */
+Client *client_find_directional(Client *c, Direction dir)
+{
+ int my_cx, my_cy, his_cx, his_cy;
+ int offset = 0;
+ int distance = 0;
+ int score, best_score;
+ Client *best_client, *cur;
+ GList *it;
+
+ if(!client_list)
+ return NULL;
+
+ /* first, find the centre coords of the currently focused window */
+ my_cx = c->frame->area.x + c->frame->area.width / 2;
+ my_cy = c->frame->area.y + c->frame->area.height / 2;
+
+ best_score = -1;
+ best_client = NULL;
+
+ for(it = g_list_first(client_list); it; it = it->next) {
+ cur = it->data;
+
+ /* the currently selected window isn't interesting */
+ if(cur == c)
+ continue;
+ if (!client_normal(cur))
+ continue;
+ if(c->desktop != cur->desktop && cur->desktop != DESKTOP_ALL)
+ continue;
+ if(cur->iconic)
+ continue;
+ if(client_focus_target(cur) == cur &&
+ !(cur->can_focus || cur->focus_notify))
+ continue;
+
+ /* find the centre coords of this window, from the
+ * currently focused window's point of view */
+ his_cx = (cur->frame->area.x - my_cx)
+ + cur->frame->area.width / 2;
+ his_cy = (cur->frame->area.y - my_cy)
+ + cur->frame->area.height / 2;
+
+ if(dir > 3) {
+ int tx;
+ /* Rotate the diagonals 45 degrees counterclockwise.
+ * To do this, multiply the matrix /+h +h\ with the
+ * vector (x y). \-h +h/
+ * h = sqrt(0.5). We can set h := 1 since absolute
+ * distance doesn't matter here. */
+ tx = his_cx + his_cy;
+ his_cy = -his_cx + his_cy;
+ his_cx = tx;
+ }
+
+ switch(dir) {
+ case Direction_North :
+ case Direction_South :
+ case Direction_NorthEast :
+ case Direction_SouthWest :
+ offset = (his_cx < 0) ? -his_cx : his_cx;
+ distance = (dir == Direction_North || dir == Direction_NorthEast) ?
+ -his_cy : his_cy;
+ break;
+ case Direction_East :
+ case Direction_West :
+ case Direction_SouthEast :
+ case Direction_NorthWest :
+ offset = (his_cy < 0) ? -his_cy : his_cy;
+ distance = (dir == Direction_West || dir == Direction_NorthWest) ?
+ -his_cx : his_cx;
+ break;
+ }
+
+ /* the target must be in the requested direction */
+ if(distance <= 0)
+ continue;
+
+ /* Calculate score for this window. The smaller the better. */
+ score = distance + offset;
+
+ /* windows more than 45 degrees off the direction are
+ * heavily penalized and will only be chosen if nothing
+ * else within a million pixels */
+ if(offset > distance)
+ score += 1000000;
+
+ if(best_score == -1 || score < best_score)
+ best_client = cur,
+ best_score = score;
+ }
+
+ return best_client;
+}
+
+void client_set_layer(Client *self, int layer)
+{
+ if (layer < 0) {
+ self->below = TRUE;
+ self->above = FALSE;
+ } else if (layer == 0) {
+ self->below = self->above = FALSE;
+ } else {
+ self->below = FALSE;
+ self->above = TRUE;
+ }
+ client_calc_layer(self);
+ client_change_state(self); /* reflect this in the state hints */
+}