using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace BF
{
    [ExecuteInEditMode]
    [RequireComponent(typeof(Canvas))]
    [DisallowMultipleComponent]
    public class CanvasSortingOrderHelper : BaseSortingOrderHelper
    {
        private Canvas canvas;
        private int originOrder = 0;

        public override void SetSortingOrder(int uiOrder, int order)
        {
            GroupOrder = order;
            if (!ReferenceEquals(canvas, null))
			{
                canvas.sortingOrder = originOrder + uiOrder + order;
            }
        }

        public override void SetUIOrder(int uiOrder)
        {
            if (!ReferenceEquals(canvas, null))
			{
                canvas.sortingOrder = originOrder + uiOrder + GroupOrder;
            }
        }

        void Awake()
        {
            canvas = this.transform.GetComponent<Canvas>();
            if (!ReferenceEquals(canvas, null))
			{
                if (!canvas.overrideSorting)
                {
                    canvas.overrideSorting = true;
                }
                originOrder = canvas.sortingOrder;
            }
        }
    }
}