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

/****************************************************************************
 Copyright (c) 2012      cocos2d-x.org
 Copyright (c) 2013-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 http://www.cocos2d-x.org

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 of this software and associated documentation files (the "Software"), to deal
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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#ifndef __CC_LUA_ENGINE_H__
#define __CC_LUA_ENGINE_H__

extern "C" {
#include "lua.h"
}

#include "base/CCScriptSupport.h"
#include "scripting/lua-bindings/manual/CCLuaStack.h"
#include "scripting/lua-bindings/manual/CCLuaValue.h"
#include "scripting/lua-bindings/manual/cocos2d/LuaScriptHandlerMgr.h"
#include "scripting/lua-bindings/manual/Lua-BindingsExport.h"

/**
 * @addtogroup lua
 * @{
 */

NS_CC_BEGIN

/**
 * The Lua engine integrated into the cocos2d-x to process the interactive operation between lua and c++.
 *
 * @lua NA
 * @js NA
 */
class CC_LUA_DLL LuaEngine : public ScriptEngineProtocol
{
public:
    /**
     * Get instance of LuaEngine.
     *
     * @return the instance of LuaEngine.
     */
    static LuaEngine* getInstance(void);
    /**
     * Get defaultEngine of LuaEngine, it was deprecated.
     *
     * @return the instance of LuaEngine.
     */
    CC_DEPRECATED_ATTRIBUTE static LuaEngine* defaultEngine(void) { return LuaEngine::getInstance(); }

    /**
     * Destructor of LuaEngine.
     */
    virtual ~LuaEngine(void);

    /**
     * Get ccScriptType of LuaEngine used, it is always kScriptTypeLua.
     *
     * @return kScriptTypeLua.
     */
    virtual ccScriptType getScriptType() override { return kScriptTypeLua; };

    /**
     * Get LuaStack of the LuaEngine.
     * All the interactive operation are all base on the LuaStack.
     *
     * @return LuaStack object.
     */
    LuaStack* getLuaStack(void) { return _stack; }

    /**
     * Add a path to find lua files in.
     *
     * @param path to be added to the Lua path.
     */
    virtual void addSearchPath(const char* path);

    /**
     * Add lua loader.
     *
     * @param func a function pointer point to the loader function.
     */
    virtual void addLuaLoader(lua_CFunction func);

    /**
     * Reload script code corresponding to moduleFileName.
     * If value of package["loaded"][moduleFileName] is existed, it would set the value nil.Then,it calls executeString
     * function.
     *
     * @param moduleFileName String object holding the filename of the script file that is to be executed.
     * @return 0 if the string is executed correctly or other if the string is executed wrongly.
     */
    virtual int reload(const char* moduleFileName);

    /**
     * Remove the related reference about the Ref object stored in the Lua table by set the value of corresponding key
     * nil: The related Lua tables are toluafix_refid_ptr_mapping,toluafix_refid_type_mapping,tolua_value_root and
     * object_Metatable["tolua_ubox"] or tolua_ubox. Meanwhile set the corresponding userdata nullptr and remove the all
     * the lua function reference corresponding to this object.
     *
     * In current mechanism, this function is called in the destructor of Ref object, developer don't call this
     * functions.
     *
     * @param object the key object to remove script object.
     */
    virtual void removeScriptObjectByObject(Ref* object) override;

    /**
     * Remove Lua function reference by nHandler by setting toluafix_refid_function_mapping[nHandle] nil.
     *
     * @param nHandler the function reference index to find the corresponding Lua function pointer.
     */
    virtual void removeScriptHandler(int nHandler) override;

    /**
     * Reallocate Lua function reference index to the Lua function pointer to add reference.
     *
     * @param nHandler the function reference index to find the corresponding Lua function pointer.
     */
    virtual int reallocateScriptHandler(int nHandler) override;

    /**
     * Execute script code contained in the given string.
     *
     * @param codes holding the valid script code that should be executed.
     * @return 0 if the string is executed correctly, other if the string is executed wrongly.
     */
    virtual int executeString(const char* codes) override;

    /**
     * Execute a script file.
     *
     * @param filename String object holding the filename of the script file that is to be executed.
     * @return the return values by calling executeFunction.
     */
    virtual int executeScriptFile(const char* filename) override;

    /**
     * Execute a scripted global function.
     * The function should not take any parameters and should return an integer.
     *
     * @param functionName String object holding the name of the function, in the global script environment, that is to
     * be executed.
     * @return The integer value returned from the script function.
     */
    virtual int executeGlobalFunction(const char* functionName) override;
    virtual int executeNodeEvent(Node* pNode, int nAction);
    virtual int executeMenuItemEvent(MenuItem* pMenuItem);
    virtual int executeCallFuncActionEvent(CallFunc* pAction, Ref* pTarget = NULL);
    virtual int executeSchedule(int nHandler, float dt, Node* pNode = NULL);
    virtual int executeLayerTouchEvent(Layer* pLayer, int eventType, Touch* pTouch);
    virtual int executeLayerKeypadEvent(Layer* pLayer, int eventType);
    virtual int executeAccelerometerEvent(Layer* pLayer, Acceleration* pAccelerationValue);
    virtual int executeEvent(int nHandler,
                             const char* pEventName,
                             Ref* pEventSource                 = NULL,
                             const char* pEventSourceClassName = NULL);
    /**
     * Handle the assert message.
     *
     * @return return true if current _callFromLua of LuaStack is not equal to 0 otherwise return false.
     */
    virtual bool handleAssert(const char* msg) override;

    /**
     * Parse the config information data.
     *
     * @param type in current mechanism,it always ConfigType::COCOSTUDIO.
     * @param str  the information data.
     * @return if __onParseConfig function exist in the Lua, it return the value that _stack->executeFunction returns
     * otherwise return false.
     */
    virtual bool parseConfig(ConfigType type, std::string_view str) override;

    /**
     * When some events triggered in the c++ also needs to pass on to lua to handle, we could call this function to send
     * events.
     *
     * @param message the ScriptEvent object that has ScriptEventType and the pointer to information data.
     * @return default return 0 otherwise return values the same as handleNodeEvent, handleMenuClickedEvent or
     * handleCallFuncActionEvent,etc.
     */
    virtual int sendEvent(const ScriptEvent& message) override;

    /**
     * Pass on the events related with ScrollView,TableCell,AssertManager, Armature, Accelerometer, Keyboard, Touch,
     * Touches ,Mouse and Custom event to lua to handle.
     *
     * @param type Different ScriptHandlerMgr::HandlerType means different processing for the data.
     * @param data The pointer point to the information which should be pass on to lua, it would be parsed in the
     * function to convert to the specific data according to the ScriptHandlerMgr::HandlerType,then pass to lua as
     * function parameters.
     * @return default return 0 otherwise return values according different ScriptHandlerMgr::HandlerType.
     */
    virtual int handleEvent(ScriptHandlerMgr::HandlerType type, void* data);
    /**
     * Pass on the events related with TableCell and TableView to lua to handle.
     *
     * @param type Different ScriptHandlerMgr::HandlerType means different processing for the data.
     * @param data The pointer point to the information which should be pass on to lua, it would be parsed in the
     * function to convert to the specific data according to the ScriptHandlerMgr::HandlerType,then pass to lua as
     * function parameters.
     * @param numResults The number of the return values.
     * @param func The callback would be called when numResults is > 0.
     * @return default return 0 otherwise return values according different ScriptHandlerMgr::HandlerType.
     */
    virtual int handleEvent(ScriptHandlerMgr::HandlerType type,
                            void* data,
                            int numResults,
                            const std::function<void(lua_State*, int)>& func);

private:
    LuaEngine(void) : _stack(nullptr) {}
    bool init(void);
    int handleNodeEvent(void* data);
    int handleMenuClickedEvent(void* data);
    int handleCallFuncActionEvent(void* data);
    int handleScheduler(void* data);
    int handleKeypadEvent(void* data);
    int handleAccelerometerEvent(void* data);
    int handleCommonEvent(void* data);
    int handleTouchEvent(void* data);
    int handleTouchesEvent(void* data);
    int handlerControlEvent(void* data);
    int handleEvenCustom(void* data);
    int handleAssetsManagerEvent(ScriptHandlerMgr::HandlerType type, void* data);
    int handleTableViewEvent(ScriptHandlerMgr::HandlerType type, void* data);
    int handleTableViewEvent(ScriptHandlerMgr::HandlerType type,
                             void* data,
                             int numResults,
                             const std::function<void(lua_State*, int)>& func);
    int handleArmatureWrapper(ScriptHandlerMgr::HandlerType type, void* data);
    int handleEventAcc(void* data);
    int handleEventKeyboard(ScriptHandlerMgr::HandlerType type, void* data);
    int handleEventTouch(ScriptHandlerMgr::HandlerType type, void* data);
    int handleEventTouches(ScriptHandlerMgr::HandlerType type, void* data);
    int handleEventMouse(ScriptHandlerMgr::HandlerType type, void* data);

private:
    static LuaEngine* _defaultEngine;
    LuaStack* _stack;
};

NS_CC_END

// end group
/// @}

#endif  // __CC_LUA_ENGINE_H__