using System;
using UnityEngine;

public class WFScreenAnchor : MonoBehaviour
{
	private void Awake()
	{
		NDebug.Assert(this.root != null, "UIRootがnullです");
		this.camera_ = this.root.transform.GetComponentInChildren<Camera>();
	}

	private void Update()
	{
		Vector3 zero = Vector3.zero;
		if (this.tracking == WFScreenAnchor.Tracking.Right)
		{
			zero.x = (float)Screen.width;
		}
		else if (this.tracking == WFScreenAnchor.Tracking.Left)
		{
			zero.x = 0f;
		}
		else if (this.tracking == WFScreenAnchor.Tracking.Top)
		{
			zero.y = (float)Screen.height;
		}
		else if (this.tracking == WFScreenAnchor.Tracking.Bottom)
		{
			zero.y = 0f;
		}
		Vector3 position = this.camera_.ScreenToWorldPoint(zero);
		Vector3 vector = base.transform.parent.InverseTransformPoint(position);
		if (this.tracking == WFScreenAnchor.Tracking.Right || this.tracking == WFScreenAnchor.Tracking.Left)
		{
			base.transform.localPosition = new Vector3(vector.x, base.transform.localPosition.y, 0f);
		}
		else
		{
			base.transform.localPosition = new Vector3(base.transform.localPosition.x, vector.y, 0f);
		}
	}

	public WFScreenAnchor.Tracking tracking
	{
		get
		{
			return this.Tracking_;
		}
	}

	public UIRoot root;

	[SerializeField]
	private WFScreenAnchor.Tracking Tracking_;

	private Camera camera_;

	public enum Tracking
	{
		Right,
		Left,
		Top,
		Bottom
	}
}