+
+/* this be mostly ripped from fvwm */
+ObClient *client_find_directional(ObClient *c, ObDirection dir)
+{
+ int my_cx, my_cy, his_cx, his_cy;
+ int offset = 0;
+ int distance = 0;
+ int score, best_score;
+ ObClient *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 OB_DIRECTION_NORTH:
+ case OB_DIRECTION_SOUTH:
+ case OB_DIRECTION_NORTHEAST:
+ case OB_DIRECTION_SOUTHWEST:
+ offset = (his_cx < 0) ? -his_cx : his_cx;
+ distance = ((dir == OB_DIRECTION_NORTH ||
+ dir == OB_DIRECTION_NORTHEAST) ?
+ -his_cy : his_cy);
+ break;
+ case OB_DIRECTION_EAST:
+ case OB_DIRECTION_WEST:
+ case OB_DIRECTION_SOUTHEAST:
+ case OB_DIRECTION_NORTHWEST:
+ offset = (his_cy < 0) ? -his_cy : his_cy;
+ distance = ((dir == OB_DIRECTION_WEST ||
+ dir == OB_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(ObClient *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 */
+}
+
+guint client_monitor(ObClient *self)
+{
+ guint i;
+
+ for (i = 0; i < screen_num_monitors; ++i) {
+ Rect *area = screen_physical_area_monitor(i);
+ if (RECT_INTERSECTS_RECT(*area, self->frame->area))
+ break;
+ }
+ if (i == screen_num_monitors) i = 0;
+ g_assert(i < screen_num_monitors);
+ return i;
+}
+
+ObClient *client_search_top_transient(ObClient *self)
+{
+ /* move up the transient chain as far as possible */
+ if (self->transient_for) {
+ if (self->transient_for != OB_TRAN_GROUP) {
+ return client_search_top_transient(self->transient_for);
+ } else {
+ GSList *it;
+
+ for (it = self->group->members; it; it = it->next) {
+ ObClient *c = it->data;
+
+ /* checking transient_for prevents infinate loops! */
+ if (c != self && !c->transient_for)
+ break;
+ }
+ if (it)
+ return it->data;
+ }
+ }
+
+ return self;
+}