调整窗口堆叠顺序

src/main.c

@@ -829,7 +829,21 @@ void arrange(monitor_t *monitor) {
 
 void restack(monitor_t *monitor) {
   draw_monitor_bar(monitor);
-  /* TODO: */
+  if (!monitor->selected_client) return;
+  if (monitor->selected_client->floating || !monitor->layout->arrange) {
+    raise_window(monitor->selected_client->window);
+  }
+  if (monitor->layout->arrange) {
+    xcb_window_t sibling = monitor->bar_window;
+    for (client_t *c = monitor->clients_stack; c; c = c->stack_next) {
+      if (!c->floating && CLIENT_VISIBLE(c)) {
+        place_window_below_sibling(c->window, sibling);
+        sibling = c->window;
+      }
+    }
+  }
+  flush_xcb_connection();
+  while (xcb_check_mask_event(XCB_EVENT_MASK_ENTER_WINDOW));
 }
 void focus(client_t *client) {
   if (!client || !CLIENT_VISIBLE(client)) {