/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
// Original file Copyright Crytek GMBH or its affiliates, used under license.

// Description : User header for multi DLL functors.


#ifndef CRYINCLUDE_CRYCOMMON_SFUNCTOR_H
#define CRYINCLUDE_CRYCOMMON_SFUNCTOR_H
#pragma once


#include "FunctorBaseFunction.h"
#include "FunctorBaseMember.h"

// Needed for CryFont to compile.
// Maybe for others too.
#include "smartptr.h"


struct SFunctor
{
public:
    // Calls the functor method.
    // returns true, if a functor is registered, false otherwise.
    bool Call()
    {
        if (!m_pFunctor)
        {
            return false;
        }

        m_pFunctor->Call();

        return true;
    }

    // Sets a new functor, common function, void return type, no arguments.
    // Parameters: the function pointer.
    template<typename tCallback>
    void Set(tCallback pCallback)
    {
        typedef TFunctor<tCallback> TType;
        m_pFunctor = new TType(pCallback);
    }

    // Sets a new functor, common function, void return type, 1 argument.
    // Parameters: the function pointer, the argument to be passed to the function.
    template<typename tCallback, typename tArgument1>
    void Set(tCallback pCallback, const tArgument1& Argument1)
    {
        typedef TFunctor<tCallback> TType;
        m_pFunctor = new TType(pCallback, Argument1);
    }

    // Sets a new functor, common function, void return type, 2 arguments.
    // Parameters: the function pointer, the 2 arguments to be passed to the function.
    template<typename tCallback, typename tArgument1, typename tArgument2>
    void Set(tCallback pCallback, const tArgument1& Argument1, const tArgument2& Argument2)
    {
        typedef TFunctor<tCallback> TType;
        m_pFunctor = new TType(pCallback, Argument1, Argument2);
    }

    // Sets a new functor, common function, void return type, no arguments.
    // Parameters: the function pointer, the 2 arguments to be passed to the function.
    template<typename tCallee>
    void Set(tCallee* pCallee, void (tCallee::* pCallback)())
    {
        typedef TFunctor<void (tCallee::*)()> TType;
        m_pFunctor = new TType(pCallee, pCallback);
    }

    // Sets a new functor, common function, void return type, 1 argument.
    // Parameters: the function pointer, the 2 arguments to be passed to the function, the argument.
    template<typename tCallee, typename tArgument1>
    void Set(tCallee* pCallee, void (tCallee::* pCallback)(tArgument1), const tArgument1& Argument1)
    {
        typedef TFunctor<void (tCallee::*)(tArgument1)> TType;
        m_pFunctor = new TType(pCallee, pCallback, Argument1);
    }

    // Sets a new functor, common function, void return type, 2 arguments.
    // Parameters: the function pointer, the 2 arguments to be passed to the function, the 2 arguments.
    template<typename tCallee, typename tArgument1, typename tArgument2>
    void Set(tCallee* pCallee, void (tCallee::* pCallback)(tArgument1, tArgument2), const tArgument1& Argument1, const tArgument2& Argument2)
    {
        typedef TFunctor<void (tCallee::*)(tArgument1, tArgument2)> TType;
        m_pFunctor = new TType(pCallee, pCallback, Argument1, Argument2);
    }

    // Used to compare equality between 2 IFunctors.
    bool operator==(const SFunctor& rOther)
    {
        return m_pFunctor == rOther.m_pFunctor;
    }

    // Used order to IFunctors (needed for some containers, like map).
    bool operator<(const SFunctor& rOther)
    {
        return m_pFunctor < rOther.m_pFunctor;
    }
protected:
    _smart_ptr<IFunctorBase>    m_pFunctor;
};

#endif // CRYINCLUDE_CRYCOMMON_SFUNCTOR_H