object.h

/*
    MIT License

    Copyright (c) 2018-2020, Alexey Dynda

    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 _NANO_OBJECT_H_
#define _NANO_OBJECT_H_

#include "canvas/point.h"
#include "canvas/rect.h"
#include "lcd_hal/io.h"
#include "tiler.h"

template <class T> class NanoObjectList;

template <class T> class NanoObject: public NanoEngineObject<T>
{
public:
    template <class N> friend class NanoObjectList;
    explicit NanoObject(const NanoPoint &pos)
        : m_rect{pos, pos}
    {
    }

    NanoObject(const NanoPoint &pos, const NanoPoint &size)
        : m_rect{pos, pos + size - (NanoPoint){1, 1}}
    {
    }

    void draw() override{};

    void refresh() override
    {
        if ( this->hasTiler() )
        {
            this->getTiler().refreshWorld(m_rect);
        }
    }

    void update() override
    {
    }

    lcdint_t width() const
    {
        return m_rect.width();
    }

    lcdint_t height() const
    {
        return m_rect.height();
    }

    void moveTo(const NanoPoint &p)
    {
        refresh();
        setPos(p);
        refresh();
    }

    void moveBy(const NanoPoint &p)
    {
        refresh();
        setPos(m_rect.p1 + p);
        refresh();
    }

    void resize(const NanoPoint &size)
    {
        refresh();
        setSize(size);
        refresh();
    }

    void setSize(const NanoPoint &size)
    {
        m_rect.p2.x = m_rect.p1.x + size.x - 1;
        m_rect.p2.y = m_rect.p1.y + size.y - 1;
    }

    void setPos(const NanoPoint &p)
    {
        m_rect = (NanoRect){
            p, (NanoPoint){(lcdint_t)(p.x + m_rect.p2.x - m_rect.p1.x), (lcdint_t)(p.y + m_rect.p2.y - m_rect.p1.y)}};
    }

    const NanoPoint bottom() const
    {
        return {(lcdint_t)((m_rect.p1.x + m_rect.p2.x) >> 1), m_rect.p2.y};
    }

    const NanoPoint top() const
    {
        return {(lcdint_t)((m_rect.p1.x + m_rect.p2.x) >> 1), m_rect.p1.y};
    }

    const NanoPoint left() const
    {
        return {m_rect.p1.x, (lcdint_t)((m_rect.p1.y + m_rect.p2.y) >> 1)};
    }

    const NanoPoint right() const
    {
        return {m_rect.p2.x, (lcdint_t)((m_rect.p1.y + m_rect.p2.y) >> 1)};
    }

    const NanoPoint center() const
    {
        return {(lcdint_t)((m_rect.p1.x + m_rect.p2.x) >> 1), (lcdint_t)((m_rect.p1.y + m_rect.p2.y) >> 1)};
    }

    lcdint_t x() const
    {
        return m_rect.p1.x;
    }

    lcdint_t y() const
    {
        return m_rect.p1.y;
    }

    const NanoPoint &getPosition() const
    {
        return m_rect.p1;
    }

    const NanoRect &getRect() const
    {
        return m_rect;
    }

protected:
    NanoRect m_rect;
};

template <class T> class NanoObjectList: public NanoObject<T>
{
public:
    using NanoObject<T>::NanoObject;

    NanoObject<T> *getNext(NanoObject<T> *prev = nullptr)
    {
        return static_cast<NanoObject<T> *>(prev ? prev->m_next : m_first);
    }

    NanoObject<T> *getPrev(NanoObject<T> *curr = nullptr)
    {
        NanoObject<T> *p = m_first;
        while ( p )
        {
            if ( p->m_next == curr )
            {
                break;
            }
            p = static_cast<NanoObject<T> *>(p->m_next);
        }
        return p;
    }

    void update() override
    {
        NanoObject<T> *p = getNext();
        while ( p )
        {
            p->update();
            p = getNext(p);
        }
    }

    void refresh() override
    {
        NanoObject<T> *p = getNext();
        while ( p )
        {
            p->setTiler(this->m_tiler);
            p->refresh();
            p = getNext(p);
        }
    }

    void draw() override
    {
        NanoObject<T> *p = getNext();
        while ( p )
        {
            p->draw();
            p = getNext(p);
        }
    }

    bool has(NanoObject<T> &object)
    {
        NanoObject<T> *p = getNext();
        while ( p && p != &object )
        {
            p = getNext(p);
        }
        return p != nullptr;
    }

    void add(NanoObject<T> &object)
    {
        if ( has(object) )
        {
            return;
        }
        object.m_next = nullptr;
        object.setTiler(this->m_tiler);
        if ( !m_first )
        {
            m_first = &object;
        }
        else
        {
            getPrev()->m_next = &object;
        }
        object.refresh();
    }

    void insert(NanoObject<T> &object)
    {
        if ( has(object) )
        {
            return;
        }
        object.m_next = m_first;
        object.m_tiler = this->m_tiler;
        m_first = &object;
        object.refresh();
    }

    void remove(NanoObject<T> &object)
    {
        if ( m_first == nullptr )
        {
        }
        else if ( &object == m_first )
        {
            object.refresh();
            m_first = object.m_next;
            object.m_next = nullptr;
            object.m_tiler = nullptr;
        }
        else
        {
            NanoObject<T> *p = m_first;
            while ( p->m_next )
            {
                if ( p->m_next == &object )
                {
                    object.refresh();
                    p->m_next = object.m_next;
                    object.m_next = nullptr;
                    object.m_tiler = nullptr;
                    break;
                }
                p = p->m_next;
            }
        }
    }

private:
    NanoObject<T> *m_first = nullptr;
};

#endif