处理 EWMH 扩展的 _NET_ACTIVE_WINDOW 协议

src/include/xcb.h

@@ -126,6 +126,7 @@ typedef enum atom_t {
   atom_wm_protocols,
   atom_wm_delete,
   atom_wm_take_focus,
+  atom_net_active_window,
   atom_net_wm_name,
   atom_net_wm_state,
   atom_net_wm_fullscreen,

src/main.c

@@ -909,6 +909,24 @@ void client_message(client_message_event_t *event) {
       bool toggle_to_fullscreen = event->data.data32[0] == 2 && !c->fullscreen;
       set_client_fullscreen(c, set_fullscreen || toggle_to_fullscreen);
     }
+  } else if (event->message_type == get_xcb_atom(atom_net_active_window)) {
+    client_t *client = get_client_of_window(event->window);
+    if (client) {
+      logger("==== _NET_ACTIVE_WINDOW\n");
+      print_client(client);
+
+      uint32_t tag_mask = 0;
+      for (uint32_t i = 0; i < g_strv_length(client->monitor->tags); i++) {
+        tag_mask |= 1 << i;
+      }
+      uint32_t target_tag = tag_mask & client->tags;
+      const user_action_arg_t arg = {.ui = target_tag};
+
+      current_monitor = client->monitor;
+      select_tag(&arg);
+      focus(client);
+      restack(current_monitor);
+    }
   }
 }
 

src/xcb/wm-extension.c

@@ -26,6 +26,7 @@ static atom_map_t atom_map[] = {
   {.atom = atom_wm_protocols, .name = "WM_PROTOCOLS"},
   {.atom = atom_wm_delete, .name = "WM_DELETE_WINDOW"},
   {.atom = atom_wm_take_focus, .name = "WM_TAKE_FOCUS"},
+  {.atom = atom_net_active_window, .name = "_NET_ACTIVE_WINDOW"},
   {.atom = atom_net_wm_name, .name = "_NET_WM_NAME"},
   {.atom = atom_net_wm_state, .name = "_NET_WM_STATE"},
   {.atom = atom_net_wm_fullscreen, .name = "_NET_WM_STATE_FULLSCREEN"},