Upgraded utilities package

Author: ashblue

Assets/Plugins/AdncUtility/Scripts/AnimatorPlayback.cs

@@ -1,6 +1,7 @@
 using UnityEngine;
 
 namespace Adnc.Utility {
+	[System.Obsolete("Please use Adnc.AnimatorHelpers.AnimatorPlayback instead")]
 	[System.Serializable]
 	public class AnimatorPlayback {
 		// When playing an animation twice it will always reset

Assets/Plugins/AdncUtility/Scripts/Singleton.meta

@@ -0,0 +1,65 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Adnc.Utility.Singletons {
+	// @SRC http://wiki.unity3d.com/index.php/Singleton
+	public abstract class SingletonBase<T> : MonoBehaviour where T : MonoBehaviour {
+		private static T _instance;
+
+		private static string SingletonName {
+			get { return typeof(T).Name; }
+		}
+
+		public static T Instance {
+			get {
+				if (_instance != null) {
+					return _instance;
+				}
+
+				var instances = FindObjectsOfType(typeof(T));
+				if (instances.Length >= 1) {
+					if (Application.isPlaying) {
+						Debug.AssertFormat(
+							instances.Length == 1,
+							"{1} {0} singletons detected. There should only ever be one present",
+							SingletonName,
+							instances.Length);
+					}
+
+					_instance = (T)instances[0];
+					return _instance;
+				}
+
+				var singleton = new GameObject(SingletonName);
+				_instance = singleton.AddComponent<T>();
+
+				// Only add DontDestroyOnLoad if the user fails to manually implement the component in a scene
+				// Thereby giving the user more control over the singleton lifecycle
+				if (Application.isPlaying) {
+					DontDestroyOnLoad(singleton);
+				}
+
+				return _instance;
+			}
+		}
+
+		protected virtual void OnDestroy () {
+			if (_instance == this) {
+				_instance = null;
+			}
+		}
+
+		/// <summary>
+		/// Test friendly method to prevent persisting singletons with editor tests
+		/// </summary>
+		public static void ClearSingleton () {
+			if (Application.isPlaying || _instance == null) {
+				return;
+			}
+
+			DestroyImmediate(_instance.gameObject);
+			_instance = null;
+		}
+	}
+}

Assets/Plugins/AdncUtility/Scripts/Singleton/SingletonBase.cs

@@ -0,0 +1,9 @@
+namespace Adnc.Utility.Singletons {
+    /// <summary>
+    /// Testing only class
+    /// </summary>
+    public class SingletonStub : SingletonBase<SingletonStub> {
+        [InfoBox("For testing purposes only. Do not implement", InfoBoxType.Error)]
+        public string globalString = "test";
+    }
+}