using System;
using System.Collections;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public static class uGUIUtility
{
	public static void SetLayer(GameObject gameObject, int layerNo, bool needChildren = false)
	{
		if (!gameObject)
		{
			return;
		}
		gameObject.layer = layerNo;
		if (!needChildren)
		{
			return;
		}
		IEnumerator enumerator = gameObject.transform.GetEnumerator();
		try
		{
			while (enumerator.MoveNext())
			{
				object obj = enumerator.Current;
				Transform transform = (Transform)obj;
				uGUIUtility.SetLayer(transform.gameObject, layerNo, true);
			}
		}
		finally
		{
			IDisposable disposable;
			if ((disposable = (enumerator as IDisposable)) != null)
			{
				disposable.Dispose();
			}
		}
	}

	public static EventSystem GetEventSystem()
	{
		if (!uGUIUtility.eventSystem)
		{
			uGUIUtility.eventSystem = EventSystem.current;
			if (!uGUIUtility.eventSystem)
			{
				Debug.LogWarning("[uGUIUtility]EventSystem が存在しないか無効になっています");
				return null;
			}
			BaseInputModule component = uGUIUtility.eventSystem.GetComponent<StandaloneInputModule>();
			if (component != null)
			{
				UnityEngine.Object.Destroy(component);
			}
			component = uGUIUtility.eventSystem.GetComponent<StandaloneInputModule2>();
			if (component == null)
			{
				uGUIUtility.eventSystem.gameObject.AddComponent<StandaloneInputModule2>();
			}
		}
		return uGUIUtility.eventSystem;
	}

	public static void SetActiveEventSystem(bool b)
	{
		EventSystem eventSystem = uGUIUtility.GetEventSystem();
		if (eventSystem == null)
		{
			return;
		}
		if (eventSystem.enabled != b)
		{
			eventSystem.enabled = b;
		}
	}

	public static void SetSelectedGameObject(GameObject Obj)
	{
		EventSystem eventSystem = uGUIUtility.GetEventSystem();
		if (eventSystem == null)
		{
			return;
		}
		eventSystem.SetSelectedGameObject(Obj);
	}

	public static void SetSelectableInterctable(GameObject Obj, bool interactable, bool changeChildren = false)
	{
		Selectable componentInChildren = Obj.GetComponentInChildren<Selectable>();
		componentInChildren.interactable = interactable;
		if (changeChildren)
		{
			Selectable[] componentsInChildren = Obj.GetComponentsInChildren<Selectable>();
			for (int i = 0; i < componentsInChildren.Length; i++)
			{
				componentsInChildren[i].interactable = interactable;
			}
		}
	}

	public static Sprite GetSpriteInAtlas(UIAtlas atlas, string resourceName)
	{
		if (atlas == null)
		{
			Debug.LogError("NGUIのアトラスにnullが指定されました");
			return null;
		}
		Texture2D texture2D = (Texture2D)atlas.texture;
		UISpriteData sprite = atlas.GetSprite(resourceName);
		if (sprite == null)
		{
			Debug.LogWarningFormat("NGUIのアトラス「{0}」から「{1}」が見つかりませんでした", new object[]
			{
				atlas.name,
				resourceName
			});
			return null;
		}
		Rect rect = new Rect((float)sprite.x, (float)(texture2D.height - sprite.y - sprite.height), (float)sprite.width, (float)sprite.height);
		Sprite sprite2;
		if (!sprite.hasBorder)
		{
			sprite2 = Sprite.Create(texture2D, rect, Vector2.one * 0.5f, 100f, 0U, SpriteMeshType.FullRect);
		}
		else
		{
			sprite2 = Sprite.Create(texture2D, rect, Vector2.one * 0.5f, 100f, 0U, SpriteMeshType.FullRect, new Vector4((float)sprite.borderLeft, (float)sprite.borderBottom, (float)sprite.borderRight, (float)sprite.borderTop));
		}
		sprite2.name = resourceName;
		return sprite2;
	}

	public static Sprite CreateSprite(Texture2D tex)
	{
		return Sprite.Create(tex, new Rect(0f, 0f, (float)tex.width, (float)tex.height), Vector2.one * 0.5f, 100f, 0U, SpriteMeshType.FullRect);
	}

	private static EventSystem eventSystem;
}