+ if (!it_below) {
+ if (client == focus_client) {
+ /* it's focused so put it at the top */
+ stacking_list = g_list_append(stacking_list, win);
+ stacking_raise(win);
+ } else {
+ /* there is no window to put this directly above, so put it at the
+ bottom */
+ stacking_list = g_list_prepend(stacking_list, win);
+ stacking_lower(win);
+ }
+ } else {
+ /* make sure it's not in the wrong layer though ! */
+ for (; it_below; it_below = g_list_next(it_below))
+ {
+ /* stop when the window is not in a higher layer than the window
+ it is going above (it_below) */
+ if (client->layer >= window_layer(it_below->data))
+ break;
+ }
+ for (; it_below != stacking_list;
+ it_below = g_list_previous(it_below))
+ {
+ /* stop when the window is not in a lower layer than the
+ window it is going under (it_above) */
+ GList *it_above = g_list_previous(it_below);
+ if (client->layer <= window_layer(it_above->data))
+ break;
+ }
+
+ GList *wins = g_list_append(NULL, win);
+ do_restack(wins, it_below);
+ g_list_free(wins);
+ }
+}
+
+gboolean stacking_occluded(ObClient *client, ObClient *sibling)
+{
+ GList *it;
+ gboolean obscured = FALSE;
+ gboolean found = FALSE;
+
+ /* no need for any looping in this case */
+ if (sibling && client->layer != sibling->layer)
+ return obscured;
+
+ for (it = stacking_list; it; it = g_list_next(it))
+ if (WINDOW_IS_CLIENT(it->data)) {
+ ObClient *c = it->data;
+ if (found) {
+ if (sibling != NULL) {
+ if (c == sibling) {
+ obscured = TRUE;
+ break;
+ }
+ }
+ else if (c->layer == client->layer) {
+ obscured = TRUE;
+ break;
+ }
+ else if (c->layer > client->layer)
+ break; /* we past its layer */
+ }
+ else if (c == client)
+ found = TRUE;
+ }
+ return obscured;