bindableLuaComponent.h

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/*******************************************************************************
** Copyright (c) 2013 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/



#pragma once

#include "vrfmodel/vrfmodelDefines.h"
#include "vrfLua/luaScriptInterfaceImpl.h"
#include <luabind/detail/make_instance.hpp>
#include <luabind/detail/class_rep.hpp>

class DtBindableLuaComponentExtension;

class DT_DLL_vrfmodel DtBindableLuaComponentInterface
{
public:
   DtBindableLuaComponentInterface(DtLocalObject* entity, const DtString& componentName, const DtString& componentType);

   virtual ~DtBindableLuaComponentInterface();

   virtual void bindLuaFunctions(lua_State*) = 0;

   virtual void bindLuaGlobals(lua_State*) = 0;

   virtual void bind(DtLocalObject*, const DtString& scriptId, lua_State*);

   virtual DtString bindableName(const DtString&) const;

protected:
   virtual bool shouldBind(lua_State*) const = 0;

protected:
   DtLocalObject* myBoundEntity;
   lua_State* myBoundForState;
   DtString myType;
};

template <typename T>
class DtBindableLuaComponent : public DtBindableLuaComponentInterface
{
public:
   DtBindableLuaComponent(DtLocalObject* entity,
      const DtString& componentName, const DtString& componentType) : DtBindableLuaComponentInterface(entity, componentName, componentType)
   {
   }

   virtual ~DtBindableLuaComponent() override {}

   virtual bool shouldBind(lua_State* L) const override
   {
      std::pair<luabind::detail::class_id, void*> dynamic = luabind::detail::get_dynamic_class(L,
         luabind::get_pointer(dynamic_cast<const T*>(this)));

      luabind::detail::class_rep* cls = luabind::detail::get_pointee_class(L, dynamic_cast<const T*>(this), dynamic.first);

      return (cls == 0);
   }
};

class DT_DLL_vrfmodel DtBindableLuaComponentExtension : public DtLuaScriptInterfaceExtension
{
public:
   DtBindableLuaComponentExtension(DtBindableLuaComponentInterface*);

   virtual ~DtBindableLuaComponentExtension() override;

   static DtLuaScriptInterfaceExtension* create(void* usr);

protected:
   virtual void bindLuaFunctions(DtLocalObject* entity, const DtString& scriptId, lua_State* L) override;

protected:
   DtBindableLuaComponentInterface* myExtension;
};