ZhenShiXunYouJi2/Assets/Scripts/OverlayLink.cs

using System;
using UnityEngine;

public class OverlayLink : MonoBehaviour
{
	public RectTransform OverlayParent
	{
		get
		{
			return this._overlays;
		}
		set
		{
			this._overlays = value;
		}
	}

	private void OnDestroy()
	{
		if (this._overlays != null)
		{
			UnityEngine.Object.Destroy(this._overlays.gameObject);
		}
	}

	private void Update()
	{
		if (this.CachedTransform.hasChanged)
		{
			this.UpdateOverlayPosition();
			this.CachedTransform.hasChanged = false;
		}
	}

	private void OnEnable()
	{
		if (this._overlays != null && !this._overlays.gameObject.activeSelf)
		{
			this._overlays.gameObject.SetActive(true);
		}
		this.UpdateOverlayPosition();
	}

	private void OnDisable()
	{
		if (this._overlays != null && this._overlays.gameObject.activeSelf)
		{
			this._overlays.gameObject.SetActive(false);
		}
	}

	public void UpdateOverlayPosition()
	{
		if (this._overlays != null)
		{
			Bounds bounds;
			if (this.CachedRenderer != null)
			{
				bounds = this.CachedRenderer.bounds;
			}
			else
			{
				if (!(this.CachedCollider != null))
				{
					UnityEngine.Debug.LogError("Was unable to update overlay position becuase the object it is linked to has not Renderer or Collider2D.");
					return;
				}
				bounds = this.CachedCollider.bounds;
			}
			this._overlays.position = bounds.center;
			this._overlays.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, bounds.extents.x * 2f);
			this._overlays.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, bounds.extents.y * 2f);
		}
	}

	private Transform CachedTransform
	{
		get
		{
			if (this._transform == null)
			{
				this._transform = base.GetComponent<Transform>();
			}
			return this._transform;
		}
	}

	private Renderer CachedRenderer
	{
		get
		{
			if (this._renderer == null)
			{
				this._renderer = base.gameObject.GetComponent<Renderer>();
			}
			return this._renderer;
		}
	}

	private Collider2D CachedCollider
	{
		get
		{
			if (this._collider == null)
			{
				this._collider = base.gameObject.GetComponent<Collider2D>();
			}
			return this._collider;
		}
	}

	private RectTransform _overlays;

	private Transform _transform;

	private Renderer _renderer;

	private Collider2D _collider;
}