refactor layout loading to add multiple layout, templates and references

engine/layout.h

@@ -39,7 +39,6 @@ enum class kShapeType : uint16_t
     Poly        = const_hash("poly"),
     RoundRect   = const_hash("round-rect"),
     Slice9      = const_hash("slice9"),
-
 };
 
 class Widget
@@ -185,8 +184,6 @@ class Node
 {
     const Node* parent{ nullptr };
     YGNodeRef y_node{ nullptr };
-    struct stat m_file_info { 0 };
-    std::string m_path;
 
 public:
     std::vector<Node> m_children;
@@ -201,7 +198,6 @@ public:
     Node(Node&& o)
     {
         m_name = std::move(o.m_name);
-        m_path = std::move(o.m_path);
         m_widget = std::move(o.m_widget);
         m_children = std::move(o.m_children);
         for (auto& c : m_children)
@@ -211,7 +207,6 @@ public:
         m_pos = o.m_pos;
         m_size = o.m_size;
         m_clip = o.m_clip;
-        m_file_info = o.m_file_info;
         o.y_node = nullptr;
         o.parent = nullptr;
     }
@@ -254,9 +249,7 @@ public:
     void update(float width, float height);
     void update_internal(const glm::vec2& origin, const glm::mat4& proj);
     void parse_attributes(kAttribute ka, const tinyxml2::XMLAttribute* attr);
-    void load(const char* path);
     void load_internal(const tinyxml2::XMLElement* x_node);
-    void reload();
     void draw();
 
     class iterator
@@ -292,3 +285,13 @@ public:
         return nullptr;
     }
 };
+
+class LayoutManager
+{
+    std::map<uint16_t, Node> m_layouts;
+    std::string m_path;
+    struct stat m_file_info { 0 };
+public:
+    bool load(const char* path);
+    void reload();
+};