添加布局算法并在新建窗口时应用规则

src/include/types.h

@@ -19,7 +19,7 @@ struct monitor_t {
   int32_t monitor_x, monitor_y, window_x, window_y;
   uint32_t monitor_width, monitor_height, window_width, window_height;
 
-  uint32_t selected_tag;
+  uint32_t selected_tags;
   char **tags;
 
   /* 为了避免引入 cairo 相关头文件，这里用 void *
@@ -65,8 +65,8 @@ typedef struct rule_t {
   /* 规则适用的屏幕总数，若设置为 0 ，则此条规则适用于任意屏幕数 */
   const uint32_t monitor_amount;
 
-  uint32_t tags;
-  uint32_t monitor_index;
+  uint32_t tags;          /* tags 必须设置为大于 0 才是有效设置 */
+  uint32_t monitor_index; /* 仅当 tags 为有效设置时该设置才生效 */
 
   bool switch_to_tag;
   bool fullscreen;

src/include/xcb.h

@@ -24,6 +24,13 @@ xcb_window_t get_root_window(void);
 bool get_window_visible(xcb_window_t window);
 xcb_window_t get_transient_window_for(xcb_window_t window);
 
+typedef struct window_class_instance_t {
+  char class[128];
+  char instance[128];
+} window_class_instance_t;
+void get_window_class_instance(xcb_window_t window,
+                               window_class_instance_t *class_instance);
+
 typedef struct window_geometry_t {
   int32_t x, y;
   uint32_t width, height, border_width;