axmol/extensions/scripting/lua-bindings/manual/CCComponentLua.h

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 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#pragma once

#include <string>
#include <unordered_map>
#include "2d/CCComponent.h"

NS_CC_BEGIN

class ComponentLua : public Component
{
public:
    static ComponentLua* create(const std::string& scriptFileName);

    ComponentLua(const std::string& scriptFileName);
    /**
     * This function is used to be invoked from lua side to get the corresponding script object of this component.
     */
    void* getScriptObject() const;

    virtual void update(float dt);
    virtual void onEnter();
    virtual void onExit();

private:
    ~ComponentLua();
    void getScriptObjectInternal() const;
    bool loadAndExecuteScript();
    void getUserData();
    void storeLuaTable();
    bool getLuaFunction(const std::string& functionName);
    void removeLuaTable();

    static void initClass();

private:
    // Script file path
    std::string _scriptFileName;
    bool _succeedLoadingScript;

    // a table returned from lua
    const void* _table;

    // string value of index
    std::string _strIndex;

    // the index used to get lua table, it is unique for every component
    static int _index;

    static const std::string ON_ENTER;
    static const std::string ON_EXIT;
    static const std::string UPDATE;
};

NS_CC_END