core: 添加窗口所属层级判定

src/core/layer.c

@@ -5,6 +5,7 @@
 #include "base/array.h"
 #include "base/memory.h"
 #include "core/types.h"
+#include "core/window.h"
 
 void layer_stack_cleanup(layer_stack_t *layer) {
   p_delete(&layer->order);
@@ -86,3 +87,17 @@ bool layer_stack_lower(layer_stack_t *layer, window_id_t window) {
 
   return true;
 }
+
+layer_type_t layer_classify(const window_props_t *props) {
+  for (size_t i = 0; i < props->type_count; ++i) {
+    window_type_t type = props->types[i];
+    if (type == ZDWM_WINDOW_TYPE_NOTIFICATION) return ZDWM_WINDOW_LAYER_OVERLAY;
+  }
+
+  for (size_t i = 0; i < props->state_count; ++i) {
+    window_state_t state = props->states[i];
+    if (state == ZDWM_WINDOW_STATE_ABOVE) return ZDWM_WINDOW_LAYER_TOP;
+  }
+
+  return ZDWM_WINDOW_LAYER_NORMAL;
+}