using UnityEngine;
using UnityEngine.UI;

public class CanvasScaleFactor : MonoBehaviour
{
	private Canvas canvas;

	private CanvasScaler canvasScaler;

	private float currentFactor;

	private Vector2 lastScreenRes = Vector2.zero;

	public bool useHiddenCanvas;

	private void Start()
	{
		canvas = GetComponent<Canvas>();
		canvasScaler = GetComponent<CanvasScaler>();
		SetScaleFactor();
	}

	private void Update()
	{
		SetScaleFactor();
		if (useHiddenCanvas)
		{
			if (GameManager.Instance.addectiveSceneLoaded != "none")
			{
				canvas.enabled = false;
			}
			else if (Singleton<QuickMenu>.Instance.isOn)
			{
				canvas.enabled = true;
			}
			else
			{
				canvas.enabled = InputManager.showUI;
			}
		}
	}

	private void SetScaleFactor()
	{
		if (!(canvasScaler == null) && !(lastScreenRes == new Vector2(Screen.width, Screen.height)))
		{
			float num = (float)Screen.width / (float)Screen.height;
			if (num <= 1.77f)
			{
				currentFactor = (float)Screen.width / 1920f;
			}
			if (num > 1.77f)
			{
				currentFactor = (float)Screen.height / 1080f;
			}
			canvasScaler.scaleFactor = currentFactor;
			lastScreenRes = new Vector2(Screen.width, Screen.height);
			Debug.Log("Set canvas scale factor");
		}
	}
}