tween.h

/*
 This file is part of the Tweeny library.

 Copyright (c) 2016-2018 Leonardo G. Lucena de Freitas
 Copyright (c) 2016 Guilherme R. Costa

 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
 the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 the Software, and to permit persons to whom the Software is furnished to do so,
 subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef TWEENY_TWEEN_H
#define TWEENY_TWEEN_H

#include <tuple>
#include <vector>
#include <functional>

#include "tweentraits.h"
#include "tweenpoint.h"

namespace tweeny {
    template<typename T, typename... Ts>
    class tween {
        public:
            static tween<T, Ts...> from(T t, Ts... vs);

        public:
            tween();

            tween<T, Ts...> & to(T t, Ts... vs);

            template<typename... Fs> tween<T, Ts...> & via(Fs... fs);

            template<typename... Fs> tween<T, Ts...> & via(int index, Fs... fs);

            template<typename... Ds> tween<T, Ts...> & during(Ds... ds);

            const typename detail::tweentraits<T, Ts...>::valuesType & step(int32_t dt, bool suppressCallbacks = false);

            const typename detail::tweentraits<T, Ts...>::valuesType & step(uint32_t dt, bool suppressCallbacks = false);

            const typename detail::tweentraits<T, Ts...>::valuesType & step(float dp, bool suppressCallbacks = false);

            const typename detail::tweentraits<T, Ts...>::valuesType & seek(float p, bool suppressCallbacks = false);

            const typename detail::tweentraits<T, Ts...>::valuesType & seek(int32_t d, bool suppressCallbacks = false);

            const typename detail::tweentraits<T, Ts...>::valuesType & seek(uint32_t d, bool suppressCallbacks = false);

            tween<T, Ts...> & onStep(typename detail::tweentraits<T, Ts...>::callbackType callback);

            tween<T, Ts...> & onStep(typename detail::tweentraits<T, Ts...>::noValuesCallbackType callback);

            tween<T, Ts...> & onStep(typename detail::tweentraits<T, Ts...>::noTweenCallbackType callback);

            tween<T, Ts...> & onSeek(typename detail::tweentraits<T, Ts...>::callbackType callback);

            tween<T, Ts...> & onSeek(typename detail::tweentraits<T, Ts...>::noTweenCallbackType callback);

            tween<T, Ts...> & onSeek(typename detail::tweentraits<T, Ts...>::noValuesCallbackType callback);

            uint32_t duration() const;

            const typename detail::tweentraits<T, Ts...>::valuesType & peek() const;

             const typename detail::tweentraits<T, Ts...>::valuesType peek(float progress) const;


            const typename detail::tweentraits<T, Ts...>::valuesType peek(uint32_t time) const;

            float progress() const;

            tween<T, Ts...> & forward();

            tween<T, Ts...> & backward();

            int direction() const;

            const typename detail::tweentraits<T, Ts...>::valuesType & jump(int32_t point, bool suppressCallbacks = false);

            uint16_t point() const;

        private /* member types */:
            using traits = detail::tweentraits<T, Ts...>;

        private /* member variables */:
            uint32_t total = 0; // total runtime
            uint16_t currentPoint = 0; // current currentPoint
            float currentProgress = 0; // current currentProgress
            std::vector<detail::tweenpoint<T, Ts...>> points;
            typename traits::valuesType current;
            std::vector<typename traits::callbackType> onStepCallbacks;
            std::vector<typename traits::callbackType> onSeekCallbacks;
            int8_t currentDirection = 1;

        private:
            /* member functions */
            tween(T t, Ts... vs);
            template<size_t I> void interpolate(float prog, unsigned point, typename traits::valuesType & values, detail::int2type<I>) const;
            void interpolate(float prog, unsigned point, typename traits::valuesType & values, detail::int2type<0>) const;
            void render(float p);
            void dispatch(std::vector<typename traits::callbackType> & cbVector);
            uint16_t pointAt(float progress) const;
    };

    template<typename T>
    class tween<T> {
        public:
            static tween<T> from(T t);

        public:
            tween(); 
            tween<T> & to(T t); 
            template<typename... Fs> tween<T> & via(Fs... fs); 
            template<typename... Fs> tween<T> & via(int index, Fs... fs); 
            template<typename... Ds> tween<T> & during(Ds... ds); 
            const T & step(int32_t dt, bool suppressCallbacks = false); 
            const T & step(uint32_t dt, bool suppressCallbacks = false); 
            const T & step(float dp, bool suppressCallbacks = false); 
            const T & seek(float p, bool suppressCallbacks = false); 
            const T & seek(int32_t d, bool suppressCallbacks = false); 
            const T & seek(uint32_t d, bool suppressCallbacks = false); 
            tween<T> & onStep(typename detail::tweentraits<T>::callbackType callback); 
            tween<T> & onStep(typename detail::tweentraits<T>::noValuesCallbackType callback); 
            tween<T> & onStep(typename detail::tweentraits<T>::noTweenCallbackType callback); 
            tween<T> & onSeek(typename detail::tweentraits<T>::callbackType callback); 
            tween<T> & onSeek(typename detail::tweentraits<T>::noValuesCallbackType callback); 
            tween<T> & onSeek(typename detail::tweentraits<T>::noTweenCallbackType callback); 
            const T & peek() const; 
            T peek(float progress) const; 
            T peek(uint32_t time) const; 
            uint32_t duration() const; 
            float progress() const; 
            tween<T> & forward(); 
            tween<T> & backward(); 
            int direction() const; 
            const T & jump(int32_t point, bool suppressCallbacks = false); 
            uint16_t point() const; 

        private /* member types */:
            using traits = detail::tweentraits<T>;

        private /* member variables */:
            uint32_t total = 0; // total runtime
            uint16_t currentPoint = 0; // current currentPoint
            float currentProgress = 0; // current currentProgress
            std::vector<detail::tweenpoint<T>> points;
            T current;
            std::vector<typename traits::callbackType> onStepCallbacks;
            std::vector<typename traits::callbackType> onSeekCallbacks;
            int8_t currentDirection = 1;

        private:
            /* member functions */
            tween(T t);
            void interpolate(float prog, unsigned point, T & value) const;
            void render(float p);
            void dispatch(std::vector<typename traits::callbackType> & cbVector);
            uint16_t pointAt(float progress) const;
    };
}

#include "tween.tcc"
#include "tweenone.tcc"

#endif //TWEENY_TWEEN_H