Added base work for dity bits in components

include/Engine/Core/ComponentWrapper.h

@@ -6,42 +6,52 @@
 #include "../Common.h"
 #include "Entity.h"
 #include "ComponentInfo.h"
+#include "DirtySet.h"
 #include "Util/Any.h"
 
-template <typename T, typename Enable = void>
-struct ComponentField { };
-
-template <typename T>
-struct ComponentField<T, typename std::enable_if<std::is_trivially_copyable<T>::value>::type>
-{
-    static T& Get(const ComponentInfo::Field_t& info, char* data) { return *reinterpret_cast<T*>(data); }
-    static void Set(const ComponentInfo::Field_t& info, char* data, const T& value) { Get(data) = value; }
-};
-
-template <>
-struct ComponentField<std::string, void>
-{
-    static std::string& Get(const ComponentInfo::Field_t& info, char* data) { return **reinterpret_cast<std::string**>(data); }
-    static void Set(const ComponentInfo::Field_t& info, char* data, const std::string& value) { Get(info, data) = value; }
-};
-
 struct ComponentWrapper
 {
-    ComponentWrapper(const ComponentInfo& componentInfo, char* data)
+    ComponentWrapper(const ComponentInfo& componentInfo, char* data, ::DirtyBitField* dirtyBitField)
         : Info(componentInfo)
         , EntityID(*reinterpret_cast<::EntityID*>(data))
         , Data(data + componentInfo.GetHeaderSize())
+        , DirtyBitField(dirtyBitField)
     { }
 
     const ComponentInfo& Info;
     const ::EntityID EntityID;
     char* Data;
+    ::DirtyBitField* DirtyBitField = nullptr;
 
     ComponentInfo::EnumType Enum(const char* fieldName, const char* enumKey)
     {
         return Info.Meta->FieldEnumDefinitions.at(fieldName).at(enumKey);
     }
 
+    bool Dirty(DirtySetType type, const std::string& fieldName)
+    {
+        if (DirtyBitField == nullptr) {
+            return true;
+        } else {
+            auto& field = Info.Fields.at(fieldName);
+            return DirtyBitField->operator[](type).count(field.Index) == 1;
+        }
+    }
+
+    void SetDirty(DirtySetType type, const std::string& fieldName, bool dirty = true)
+    {
+        if (DirtyBitField == nullptr) {
+            return;
+        }
+
+        auto& field = Info.Fields.at(fieldName);
+        if (dirty) {
+            DirtyBitField->operator[](type).insert(field.Index);
+        } else {
+            DirtyBitField->operator[](type).erase(field.Index);
+        }
+    }
+
     template <typename T>
     T& Field(const std::string& name)
     {
@@ -96,32 +106,32 @@ struct ComponentWrapper
     {
         friend struct ComponentWrapper;
     private:
-        SubscriptProxy(ComponentWrapper* component, std::string propertyName)
+        SubscriptProxy(ComponentWrapper* component, std::string fieldName)
             : m_Component(component)
-            , m_PropertyName(propertyName)
+            , m_FieldName(fieldName)
         { }
 
         ComponentWrapper* m_Component;
-        std::string m_PropertyName;
+        std::string m_FieldName;
 
     public:
         // Return the integer value of an enum type key for this field
-        ComponentInfo::EnumType Enum(const char* enumKey) { return m_Component->Enum(m_PropertyName.c_str(), enumKey); }
-        bool Dirty(DirtySet set) { return true; }
-        void SetDirty(bool dirty = true) { }
+        ComponentInfo::EnumType Enum(const char* enumKey) { return m_Component->Enum(m_FieldName.c_str(), enumKey); }
+        bool Dirty(DirtySetType type) { return m_Component->Dirty(type, m_FieldName); }
+        void SetDirty(DirtySetType type, bool dirty = true) { m_Component->SetDirty(type, m_FieldName, dirty); }
 
         template <typename T>
-        operator T&() { return m_Component->Field<T>(m_PropertyName); }
+        operator T&() { return m_Component->Field<T>(m_FieldName); }
 
         template <typename T>
-        void operator=(const T val) { m_Component->SetField<T>(m_PropertyName, val); }
+        void operator=(const T val) { m_Component->SetField<T>(m_FieldName, val); }
         // TODO: Pass by reference and rvalue (universal reference?)
         //template <typename T>
         //void operator=(T& val) { m_Component->SetField<T>(m_PropertyName, val); }
 
         // Specialization for string literals
         template <std::size_t N>
-        void operator=(const char(&val)[N]) { m_Component->SetField<N>(m_PropertyName, val); }
+        void operator=(const char(&val)[N]) { m_Component->SetField<N>(m_FieldName, val); }
     };
     SubscriptProxy operator[](const std::string& propertyName) { return SubscriptProxy(this, propertyName); }
 };
@@ -130,7 +140,7 @@ struct ComponentWrapper
 struct SharedComponentWrapper : ComponentWrapper
 {
     SharedComponentWrapper(const ComponentInfo& componentInfo, boost::shared_array<char> data)
-        : ComponentWrapper(componentInfo, data.get())
+        : ComponentWrapper(componentInfo, data.get(), nullptr)
         , m_DataReference(data)
     { }