ListNode.h

#pragma once


#include <libutl/MaxObject.h>


UTL_NS_BEGIN;



class ListNode
{
public:
    ListNode()
    {
        init();
    }

    ListNode(const Object* object)
    {
        init(object);
    }

    void addAfter(ListNode* node);

    void addBefore(ListNode* node);

    Object*
    get() const
    {
        return _object;
    }

    bool
    isHead() const
    {
        return (_prev == nullptr);
    }

    bool
    isTail() const
    {
        return (_next == nullptr);
    }

    bool
    isSentinelTail() const
    {
        return (_object == &maxObject);
    }

    ListNode*
    next() const
    {
        return _next;
    }

    void
    setNext(ListNode* node)
    {
        _next = node;
    }

    ListNode*
    prev() const
    {
        return _prev;
    }

    void
    setPrev(ListNode* prev)
    {
        _prev = prev;
    }

    void remove();

    void
    set(const Object* object)
    {
        _object = const_cast<Object*>(object);
    }

private:
    void
    init(const Object* object = nullptr)
    {
        _prev = _next = nullptr;
        _object = const_cast<Object*>(object);
    }

private:
    ListNode *_prev, *_next;
    Object* _object;
};


UTL_NS_END;