开启 xcb 事件循环

src/main.c

@@ -20,6 +20,9 @@ static gboolean update_wallpaper(gpointer user_data);
 static void set_wallpaper_by_index(uint32_t index);
 static wallpaper_config_t *parse_wallpaper_config(const char **wallpapers);
 static void free_wallpaper_config(wallpaper_config_t *wallpaper_config);
+static void init_xcb_event_loop(void);
+static gboolean handle_xcb_event(GIOChannel *channel, GIOCondition condition,
+                                 gpointer userdata);
 static void cleanup(void);
 
 static monitor_t *monitors = NULL;
@@ -163,6 +166,25 @@ void free_wallpaper_config(wallpaper_config_t *wallpaper_config) {
   free(wallpaper_config);
 }
 
+void init_xcb_event_loop(void) {
+  GIOChannel *channel = g_io_channel_unix_new(get_xcb_connection_fd());
+  g_io_channel_set_encoding(channel, NULL, NULL);
+  GIOCondition cond = G_IO_IN | G_IO_HUP | G_IO_ERR;
+  g_io_add_watch(channel, cond, handle_xcb_event, NULL);
+  g_io_channel_unref(channel);
+}
+
+gboolean handle_xcb_event(GIOChannel *channel, GIOCondition condition,
+                          gpointer userdata) {
+  if ((condition & G_IO_HUP) || (condition & G_IO_ERR)) {
+    g_main_loop_quit(loop);
+    return false;
+  }
+
+  start_xcb_event_loop();
+  return true;
+}
+
 void cleanup(void) {
   clean_xcb();
 
@@ -200,6 +222,8 @@ int main(int argc, char *argv[]) {
 
   free_window_list(window_list);
 
+  init_xcb_event_loop();
+
   loop = g_main_loop_new(NULL, FALSE);
   g_main_loop_run(loop);