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namespace LuaBind
{
///
/// 注册工厂，注册class table，以type name为键设置在名称空间上。在注册阶段不会设置元表，等到New方法调用的时候才会。
///
template<class TYPE>
void State::RegisterFactory()
{
cc8* type = TYPE::GetFactoryName();
lua_State* L = mState;
State& state = *this;
int top = lua_gettop(L); // namespace table
assert(lua_istable(L, top));
// class table
lua_newtable(L);
TYPE::RegisterClassShared(state);
TYPE::RegisterFactoryClass(state);
TYPE::RegisterClass(state);
// 检测TYPE里面是否没有注册必须的方法
#define _assertmethod(I, NAME) \
GetField(I, NAME); \
assert(IsType(-1, LUA_TFUNCTION)); \
Pop();
//_assertmethod(-1, "New");
#undef _assertmethod
#if LUA_BIND_ENABLE_NATIVE_EXTEND
// .Extend()
lua_pushvalue(state, -1); // class table
lua_pushcclosure(state, TYPE::_ExtendFactory, 1);
lua_setfield(state, -2, "Extend");
#endif
// class["__index"] = class
lua_pushvalue(state, -1); // class table
lua_setfield(state, -2, "__index");
TYPE::SetClassTableRef(state, -1);
SetField(top, type);
// reset top
lua_settop(L, top);
// 后处理
TYPE::RegisterPostprocess(state);
}
///
/// Singleton
///
template<typename TYPE>
void State::RegisterSingleton()
{
lua_State* L = mState;
State& state = *this;
int top = lua_gettop(L); // namespace table
assert(lua_istable(L, top));
// class table.
lua_newtable(L);
TYPE::RegisterClassShared(state);
TYPE::RegisterSingletonClass(state);
TYPE::RegisterClass(state);
TYPE::SetClassTableRef(state, -1);
lua_pushvalue(state, -1);
lua_setfield(state, -2, "__index");
#if LUA_BIND_ENABLE_NATIVE_EXTEND
// .Extend()
lua_pushvalue(state, -1); // class table
lua_pushcclosure(state, TYPE::_ExtendSingleton, 1);
lua_setfield(state, -2, "Extend");
#endif
cc8* type = TYPE::GetSingletonName();
SetField(top, type);
// reset top
lua_settop(L, top);
// 后处理
TYPE::RegisterPostprocess(state);
}
template<typename TYPE>
void State::SetField(int idx, cc8* key, TYPE value)
{
if (IsTableOrUserdata(idx))
{
idx = AbsIndex(idx);
this->Push(value);
lua_setfield(mState, idx, key);
}
}
template<typename TYPE>
void State::SetFieldByIndex(int idx, int key, TYPE value)
{
if (IsTableOrUserdata(idx))
{
idx = AbsIndex(idx);
this->Push(value);
lua_rawseti(mState, idx, key);
}
}
template<typename TYPE>
TYPE State::GetField(int idx, cc8* key, TYPE value)
{
GetField(idx, key);
TYPE result = GetValue < TYPE >(-1, value);
this->Pop();
return result;
}
template<typename TYPE>
TYPE State::GetField(int idx, int key, TYPE value)
{
GetField(idx, key);
TYPE result = GetValue < TYPE >(-1, value);
Pop();
return result;
}
template<typename TYPE>
TYPE* State::GetUserdata(int idx)
{
void* p = nullptr;
if (IsType(idx, LUA_TUSERDATA))
{
p = *(void**)lua_touserdata(mState, idx);
}
return static_cast<TYPE*>(p);
}
template<typename TYPE>
TYPE* State::CheckUserdata(int idx)
{
if (IsType(idx, LUA_TUSERDATA))
{
if (lua_getmetatable(mState, idx)) // ref table
{
if (lua_getmetatable(mState, -1)) // member table
{
if (lua_getmetatable(mState, -1)) // class table
{
TYPE::PushClassTable(*this); // target class table
if (lua_rawequal(mState, -1, -2))
{
Pop(4); // ref\member\class\target class
TYPE* udata = GetUserdata<TYPE>(idx);
return udata; // userdata
}
Pop(2); // target class table\class table
}
Pop(1); // member table
}
Pop(1); // ref table
}
}
luaL_typerror(mState, idx, TYPE::GetClassName());
return nullptr;
}
}
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