67 lines
2.5 KiB
C#
67 lines
2.5 KiB
C#
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// Copyright (c) 2015 - 2023 Doozy Entertainment. All Rights Reserved.
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// This code can only be used under the standard Unity Asset Store End User License Agreement
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// A Copy of the EULA APPENDIX 1 is available at http://unity3d.com/company/legal/as_terms
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using Doozy.Runtime.Common.Attributes;
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using UnityEngine;
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// ReSharper disable MemberCanBePrivate.Global
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// ReSharper disable CheckNamespace
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namespace Doozy.Runtime.Common
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{
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/// <summary> Base MonoBehaviour clas that implements the singleton pattern </summary>
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/// <typeparam name="T"> Class type </typeparam>
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public abstract class SingletonBehaviour<T> : MonoBehaviour where T : MonoBehaviour
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{
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// ReSharper disable once StaticMemberInGenericType
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/// <summary> Internal variable used as a flag when the application is quitting </summary>
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[ClearOnReload(resetValue: false)]
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protected static bool applicationIsQuitting { get; set; }
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[ClearOnReload]
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private static T s_instance;
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/// <summary> Get singleton instance </summary>
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public static T instance
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{
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get
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{
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// Debug.Log($"Instance");
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if (applicationIsQuitting) return null;
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if (s_instance != null) return s_instance;
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s_instance = FindObjectOfType<T>();
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if (s_instance != null) return s_instance;
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// DontDestroyOnLoad(SceneUtils.AddToScene<T>(typeof(T).Name, true).gameObject);
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s_instance = new GameObject(typeof(T).Name).AddComponent<T>();
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return s_instance;
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}
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}
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// [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
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// private static void RunOnStart() =>
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// Application.quitting += () => applicationIsQuitting = false;
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protected virtual void OnApplicationQuit() =>
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applicationIsQuitting = true;
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protected virtual void OnDestroy()
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{
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// applicationIsQuitting = true;
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}
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protected virtual void Awake()
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{
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if (s_instance != null && s_instance != this)
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{
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Debug.Log($"There cannot be two '{typeof(T).Name}' active at the same time. Destroying the '{gameObject.name}' GameObject!");
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Destroy(gameObject);
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return;
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}
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// s_instance = FindObjectOfType<T>();
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s_instance = GetComponent<T>();
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DontDestroyOnLoad(gameObject);
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}
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}
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}
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