feat: Update package.json to 1.6.0

Support contravariance/covariance

.github/ISSUE_TEMPLATE/feature-request.yaml

@@ -12,6 +12,6 @@ body:
   - type: textarea
     id: feature-description
     attributes:
-      label: Feature destription
+      label: Feature description
     validations:
       required: true

.github/ISSUE_TEMPLATE/improvement-request.yaml

@@ -12,6 +12,6 @@ body:
   - type: textarea
     id: improvement-description
     attributes:
-      label: Improvement destription
+      label: Improvement description
     validations:
       required: true

.github/workflows/package.yaml

@@ -14,7 +14,7 @@ jobs:
     steps:
       # Checkout
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           lfs: true
 
@@ -28,14 +28,18 @@ jobs:
 
       # Build
       - name: Build .unitypackage
-        uses: game-ci/unity-builder@v2
+        uses: game-ci/unity-builder@v4
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
         with:
-          unityVersion: 2020.3.8f1
+          unityVersion: 2021.3.29f1
           buildMethod: MackySoft.PackageTools.Editor.UnityPackageExporter.Export
 
       # Upload
       - name: Upload .unitypackage
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: Unity Package
           path: Build

.github/workflows/release.yaml

@@ -18,7 +18,7 @@ jobs:
     outputs:
       sha: ${{ steps.commit.outputs.sha }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Output package.json (Before)
         run: cat ${{ env.TARGET_FILE}}
 
@@ -61,22 +61,24 @@ jobs:
     needs: [update-packagejson]
     strategy:
       matrix:
-        unity: ["2020.3.8f1"]
+        unity: ["2021.3.29f1"]
         include:
-          - unityVersion: 2020.3.8f1
+          - unityVersion: 2021.3.29f1
-            license: UNITY_LICENSE_2020
+            license: UNITY_LICENSE
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
       - run: echo ${{ needs.update-packagejson.outputs.sha }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           ref: ${{ needs.update-packagejson.outputs.sha }}
 
       - name: Export unitypackage
-        uses: game-ci/unity-builder@v2
+        uses: game-ci/unity-builder@v4
         env:
-          UNITY_LICENSE: ${{ secrets[matrix.license] }}
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
         with:
           projectPath: .
           unityVersion: ${{ matrix.unityVersion }}
@@ -95,7 +97,7 @@ jobs:
         working-directory: .
 
       # Store artifacts.
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           name: SerializeReference-Extensions.unitypackage
           path: ./Build/SerializeReference-Extensions.unitypackage
@@ -117,7 +119,7 @@ jobs:
           prerelease: false
 
       # Download(All) Artifacts to current directory
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
       
       # Upload to Releases(unitypackage)
       - uses: actions/upload-release-asset@v1

Assembly-CSharp-Editor.csproj

@@ -1,730 +0,0 @@
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-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
-    <LangVersion>9.0</LangVersion>
-  </PropertyGroup>
-  <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProductVersion>10.0.20506</ProductVersion>
-    <SchemaVersion>2.0</SchemaVersion>
-    <RootNamespace></RootNamespace>
-    <ProjectGuid>{04F153C5-20D1-19B7-12B1-BC5B94BDF53A}</ProjectGuid>
-    <OutputType>Library</OutputType>
-    <AppDesignerFolder>Properties</AppDesignerFolder>
-    <AssemblyName>Assembly-CSharp-Editor</AssemblyName>
-    <TargetFrameworkVersion>v4.7.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <BaseDirectory>.</BaseDirectory>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>Temp\Bin\Debug\</OutputPath>
-    <DefineConstants>UNITY_2021_3_29;UNITY_2021_3;UNITY_2021;UNITY_5_3_OR_NEWER;UNITY_5_4_OR_NEWER;UNITY_5_5_OR_NEWER;UNITY_5_6_OR_NEWER;UNITY_2017_1_OR_NEWER;UNITY_2017_2_OR_NEWER;UNITY_2017_3_OR_NEWER;UNITY_2017_4_OR_NEWER;UNITY_2018_1_OR_NEWER;UNITY_2018_2_OR_NEWER;UNITY_2018_3_OR_NEWER;UNITY_2018_4_OR_NEWER;UNITY_2019_1_OR_NEWER;UNITY_2019_2_OR_NEWER;UNITY_2019_3_OR_NEWER;UNITY_2019_4_OR_NEWER;UNITY_2020_1_OR_NEWER;UNITY_2020_2_OR_NEWER;UNITY_2020_3_OR_NEWER;UNITY_2021_1_OR_NEWER;UNITY_2021_2_OR_NEWER;UNITY_2021_3_OR_NEWER;PLATFORM_ARCH_64;UNITY_64;UNITY_INCLUDE_TESTS;ENABLE_AR;ENABLE_AUDIO;ENABLE_CACHING;ENABLE_CLOTH;ENABLE_EVENT_QUEUE;ENABLE_MICROPHONE;ENABLE_MULTIPLE_DISPLAYS;ENABLE_PHYSICS;ENABLE_TEXTURE_STREAMING;ENABLE_VIRTUALTEXTURING;ENABLE_UNET;ENABLE_LZMA;ENABLE_UNITYEVENTS;ENABLE_VR;ENABLE_WEBCAM;ENABLE_UNITYWEBREQUEST;ENABLE_WWW;ENABLE_CLOUD_SERVICES;ENABLE_CLOUD_SERVICES_ADS;ENABLE_CLOUD_SERVICES_USE_WEBREQUEST;ENABLE_CLOUD_SERVICES_CRASH_REPORTING;ENABLE_CLOUD_SERVICES_PURCHASING;ENABLE_CLOUD_SERVICES_ANALYTICS;ENABLE_CLOUD_SERVICES_UNET;ENABLE_CLOUD_SERVICES_BUILD;ENABLE_CLOUD_LICENSE;ENABLE_EDITOR_HUB_LICENSE;ENABLE_WEBSOCKET_CLIENT;ENABLE_DIRECTOR_AUDIO;ENABLE_DIRECTOR_TEXTURE;ENABLE_MANAGED_JOBS;ENABLE_MANAGED_TRANSFORM_JOBS;ENABLE_MANAGED_ANIMATION_JOBS;ENABLE_MANAGED_AUDIO_JOBS;ENABLE_MANAGED_UNITYTLS;INCLUDE_DYNAMIC_GI;ENABLE_SCRIPTING_GC_WBARRIERS;PLATFORM_SUPPORTS_MONO;RENDER_SOFTWARE_CURSOR;ENABLE_VIDEO;ENABLE_ACCELERATOR_CLIENT_DEBUGGING;PLATFORM_STANDALONE;TEXTCORE_1_0_OR_NEWER;PLATFORM_STANDALONE_WIN;UNITY_STANDALONE_WIN;UNITY_STANDALONE;ENABLE_RUNTIME_GI;ENABLE_MOVIES;ENABLE_NETWORK;ENABLE_NVIDIA;ENABLE_CRUNCH_TEXTURE_COMPRESSION;ENABLE_UNITY_GAME_SERVICES_ANALYTICS_SUPPORT;ENABLE_OUT_OF_PROCESS_CRASH_HANDLER;ENABLE_CLUSTER_SYNC;ENABLE_CLUSTERINPUT;PLATFORM_UPDATES_TIME_OUTSIDE_OF_PLAYER_LOOP;GFXDEVICE_WAITFOREVENT_MESSAGEPUMP;ENABLE_WEBSOCKET_HOST;ENABLE_MONO;NET_4_6;NET_UNITY_4_8;ENABLE_PROFILER;DEBUG;TRACE;UNITY_ASSERTIONS;UNITY_EDITOR;UNITY_EDITOR_64;UNITY_EDITOR_WIN;ENABLE_UNITY_COLLECTIONS_CHECKS;ENABLE_BURST_AOT;UNITY_TEAM_LICENSE;ENABLE_CUSTOM_RENDER_TEXTURE;ENABLE_DIRECTOR;ENABLE_LOCALIZATION;ENABLE_SPRITES;ENABLE_TERRAIN;ENABLE_TILEMAP;ENABLE_TIMELINE;ENABLE_LEGACY_INPUT_MANAGER;TEXTCORE_FONT_ENGINE_1_5_OR_NEWER;CSHARP_7_OR_LATER;CSHARP_7_3_OR_NEWER</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
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+guid: 1fa875a00fbff0347b96e37e1dc81575
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
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+  assetBundleVariant: 

Assets/Example/Example.cs

@@ -0,0 +1,129 @@
+using System.Collections.Generic;
+using System;
+using UnityEditor;
+using UnityEngine;
+
+[Serializable]
+public abstract class Food
+{
+	public string name;
+
+	public float kcal;
+}
+
+[Serializable]
+public class Apple : Food
+{
+	public Apple ()
+	{
+		name = "Apple";
+		kcal = 100f;
+	}
+}
+
+[Serializable]
+public class Peach : Food
+{
+	public Peach ()
+	{
+		name = "Peach";
+		kcal = 100f;
+	}
+}
+
+[Serializable]
+public class Grape : Food
+{
+	public Grape ()
+	{
+		name = "Grape";
+		kcal = 100f;
+	}
+}
+
+[Serializable]
+[HideInTypeMenu]
+public class Banana : Food
+{
+	public Banana ()
+	{
+		name = "Banana";
+		kcal = 100f;
+	}
+}
+
+public class Example : MonoBehaviour
+{
+
+	[SerializeReference]
+	public Food food1 = new Apple();
+
+	[SerializeReference]
+	public Food food2 = new Peach();
+
+	[SerializeReference]
+	public Food food3 = new Grape();
+
+	[SerializeReference, SubclassSelector]
+	public Food foodOne = new Apple();
+
+	[SerializeReference, SubclassSelector]
+	public Food foodTwo = new Peach();
+
+	// UseToStringAsLabel support on UNITY_2021_3_OR_NEWER
+	[SerializeReference, SubclassSelector(UseToStringAsLabel = true)]
+	public Food foodThree = new Grape();
+
+	[SerializeReference]
+	public List<Food> foodsOne = new List<Food>
+	{
+		new Apple(),
+		new Peach(),
+		new Grape()
+	};
+
+	[SerializeReference, SubclassSelector]
+	public List<Food> foodsTwo = new List<Food>
+	{
+		new Apple(),
+		new Peach(),
+		new Grape()
+	};
+}
+
+#if UNITY_EDITOR
+
+/// These classes are in a folder named "Editor" in the project
+
+[CustomPropertyDrawer(typeof(Peach), true)]
+public class PeachDrawer : PropertyDrawer
+{
+	public override void OnGUI (Rect position, SerializedProperty property, GUIContent label)
+	{
+		position.height = EditorGUIUtility.singleLineHeight;
+		EditorGUI.PropertyField(position, property.FindPropertyRelative("name"));
+
+		position.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
+		EditorGUI.PropertyField(position, property.FindPropertyRelative("kcal"));
+	}
+
+	public override float GetPropertyHeight (SerializedProperty property, GUIContent label)
+	{
+		return EditorGUIUtility.singleLineHeight * 2 + EditorGUIUtility.standardVerticalSpacing * 1;
+	}
+}
+
+[CustomPropertyDrawer(typeof(Apple), true)]
+public class AppleDrawer : PropertyDrawer
+{
+	public override void OnGUI (Rect position, SerializedProperty property, GUIContent label)
+	{
+		EditorGUI.LabelField(position, "I'm an apple!");
+	}
+
+	public override float GetPropertyHeight (SerializedProperty property, GUIContent label)
+	{
+		return EditorGUIUtility.singleLineHeight;
+	}
+}
+#endif

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Assets/Example/Example.unity.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: edbf6cf086198fc4dbd84a5a8d648144
+DefaultImporter:
+  externalObjects: {}
+  userData: 
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+  assetBundleVariant: 

Assets/Example/Example_Generics.cs

@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+public interface IActor { }
+public interface IStandardActor : IActor { }
+public interface INetworkActor : IActor { }
+
+public interface IContravarianceAction<in T> where T : IActor {
+	void DoAction (T actor);
+}
+
+public interface ICovarianceAction<out T> where T : IActor
+{
+	T Actor { get; }
+}
+
+public interface IActorAction : IContravarianceAction<IActor>, ICovarianceAction<IActor> { }
+public interface IStandardActorAction : IContravarianceAction<IStandardActor>, ICovarianceAction<IStandardActor> { }
+public interface INetworkActorAction : IContravarianceAction<INetworkActor>, ICovarianceAction<INetworkActor> { }
+
+[Serializable]
+public sealed class StandardActorAction : IContravarianceAction<IStandardActor>, ICovarianceAction<IStandardActor>
+{
+	public void DoAction (IStandardActor actor)
+	{
+	}
+	public IStandardActor Actor => null;
+}
+
+[Serializable]
+public sealed class ActorAction : IContravarianceAction<IActor>, ICovarianceAction<IActor>
+{
+	public void DoAction (IActor actor)
+	{
+	}
+	public IActor Actor => null;
+}
+
+[Serializable]
+public abstract class BaseAction<T> : IContravarianceAction<T>, ICovarianceAction<T> where T : IActor
+{
+	public void DoAction (T actor) {
+	}
+	public T Actor => default;
+}
+
+[Serializable]
+public sealed class DerivedAction1 : BaseAction<IActor> { }
+
+[Serializable]
+public sealed class DerivedAction2 : BaseAction<INetworkActor> { }
+
+[Serializable]
+public sealed class DerivedAction3 : BaseAction<IStandardActor> { }
+
+[Serializable]
+public sealed class NetworkActorAction1 : INetworkActorAction
+{
+	public void DoAction (INetworkActor actor)
+	{
+	}
+	public INetworkActor Actor => null;
+}
+
+[Serializable]
+public sealed class NetworkActorAction2 : IContravarianceAction<INetworkActor>, ICovarianceAction<INetworkActor>
+{
+	public void DoAction (INetworkActor actor)
+	{
+	}
+	public INetworkActor Actor => null;
+}
+
+[Serializable]
+public sealed class NetworkActorAction3 : IContravarianceAction<IActor>, ICovarianceAction<IActor>
+{
+	public void DoAction (IActor actor)
+	{
+	}
+	public IActor Actor => null;
+}
+
+public class Example_Generics : MonoBehaviour
+{
+
+	[SerializeReference, SubclassSelector]
+	public List<IContravarianceAction<INetworkActor>> contravarianceActions = new List<IContravarianceAction<INetworkActor>>();
+
+	[SerializeReference, SubclassSelector]
+	public List<ICovarianceAction<INetworkActor>> covarianceActions = new List<ICovarianceAction<INetworkActor>>();
+
+}

Assets/Example/Example_Generics.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: dff76005e1dfac84287448b12c4b160e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
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Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/AdvancedTypePopup.cs

@@ -1,5 +1,4 @@
-#if UNITY_2019_3_OR_NEWER
+using System;
-using System;
 using System.Linq;
 using System.Collections.Generic;
 using UnityEngine;
@@ -138,4 +137,3 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 
 	}
 }
-#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/MackySoft.SerializeReferenceExtensions.Editor.asmdef

@@ -12,9 +12,7 @@
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,
-    "defineConstraints": [
+    "defineConstraints": [],
-        "UNITY_2019_3_OR_NEWER"
-    ],
     "versionDefines": [],
     "noEngineReferences": false
 }

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/ManagedReferenceContextualPropertyMenu.cs

@@ -0,0 +1,107 @@
+// NOTE: managedReferenceValue getter is available only in Unity 2021.3 or later.
+#if UNITY_2021_3_OR_NEWER
+using System;
+using UnityEditor;
+using UnityEngine;
+
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
+	public static class ManagedReferenceContextualPropertyMenu
+	{
+
+		const string kCopiedPropertyPathKey = "SerializeReferenceExtensions.CopiedPropertyPath";
+		const string kClipboardKey = "SerializeReferenceExtensions.CopyAndPasteProperty";
+
+		static readonly GUIContent kPasteContent = new GUIContent("Paste Property");
+		static readonly GUIContent kNewInstanceContent = new GUIContent("New Instance");
+		static readonly GUIContent kResetAndNewInstanceContent = new GUIContent("Reset and New Instance");
+
+		[InitializeOnLoadMethod]
+		static void Initialize ()
+		{
+			EditorApplication.contextualPropertyMenu += OnContextualPropertyMenu;
+		}
+
+		static void OnContextualPropertyMenu (GenericMenu menu, SerializedProperty property)
+		{
+			if (property.propertyType == SerializedPropertyType.ManagedReference)
+			{
+				// NOTE: When the callback function is called, the SerializedProperty is rewritten to the property that was being moused over at the time,
+				// so a new SerializedProperty instance must be created.
+				SerializedProperty clonedProperty = property.Copy();
+
+				menu.AddItem(new GUIContent($"Copy \"{property.propertyPath}\" property"), false, Copy, clonedProperty);
+
+				string copiedPropertyPath = SessionState.GetString(kCopiedPropertyPathKey, string.Empty);
+				if (!string.IsNullOrEmpty(copiedPropertyPath))
+				{
+					menu.AddItem(new GUIContent($"Paste \"{copiedPropertyPath}\" property"), false, Paste, clonedProperty);
+				}
+				else
+				{
+					menu.AddDisabledItem(kPasteContent);
+				}
+
+				menu.AddSeparator("");
+
+				bool hasInstance = clonedProperty.managedReferenceValue != null;
+				if (hasInstance)
+				{
+					menu.AddItem(kNewInstanceContent, false, NewInstance, clonedProperty);
+					menu.AddItem(kResetAndNewInstanceContent, false, ResetAndNewInstance, clonedProperty);
+				}
+				else
+				{
+					menu.AddDisabledItem(kNewInstanceContent);
+					menu.AddDisabledItem(kResetAndNewInstanceContent);
+				}
+			}
+		}
+
+		static void Copy (object customData)
+		{
+			SerializedProperty property = (SerializedProperty)customData;
+			string json = JsonUtility.ToJson(property.managedReferenceValue);
+			SessionState.SetString(kCopiedPropertyPathKey, property.propertyPath);
+			SessionState.SetString(kClipboardKey, json);
+		}
+
+		static void Paste (object customData)
+		{
+			SerializedProperty property = (SerializedProperty)customData;
+			string json = SessionState.GetString(kClipboardKey, string.Empty);
+			if (string.IsNullOrEmpty(json))
+			{
+				return;
+			}
+
+			Undo.RecordObject(property.serializedObject.targetObject, "Paste Property");
+			JsonUtility.FromJsonOverwrite(json, property.managedReferenceValue);
+			property.serializedObject.ApplyModifiedProperties();
+		}
+
+		static void NewInstance (object customData)
+		{
+			SerializedProperty property = (SerializedProperty)customData;
+			string json = JsonUtility.ToJson(property.managedReferenceValue);
+
+			Undo.RecordObject(property.serializedObject.targetObject, "New Instance");
+			property.managedReferenceValue = JsonUtility.FromJson(json, property.managedReferenceValue.GetType());
+			property.serializedObject.ApplyModifiedProperties();
+
+			Debug.Log($"Create new instance of \"{property.propertyPath}\".");
+		}
+
+		static void ResetAndNewInstance (object customData)
+		{
+			SerializedProperty property = (SerializedProperty)customData;
+
+			Undo.RecordObject(property.serializedObject.targetObject, "Reset and New Instance");
+			property.managedReferenceValue = Activator.CreateInstance(property.managedReferenceValue.GetType());
+			property.serializedObject.ApplyModifiedProperties();
+
+			Debug.Log($"Reset property and created new instance of \"{property.propertyPath}\".");
+		}
+	}
+}
+#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/ManagedReferenceContextualPropertyMenu.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 734d3eb8da4785b49919aea6db62d877
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/ManagedReferenceUtility.cs

@@ -1,18 +1,42 @@
-#if UNITY_2019_3_OR_NEWER
+using System;
-using System;
 using System.Reflection;
 using UnityEditor;
+using UnityEngine;
+
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
 
-namespace MackySoft.SerializeReferenceExtensions.Editor {
 	public static class ManagedReferenceUtility {
 
 		public static object SetManagedReference (this SerializedProperty property,Type type) {
-			object obj = (type != null) ? Activator.CreateInstance(type) : null;
+			object result = null;
-			property.managedReferenceValue = obj;
+
-			return obj;
+#if UNITY_2021_3_OR_NEWER
+			// NOTE: managedReferenceValue getter is available only in Unity 2021.3 or later.
+			if ((type != null) && (property.managedReferenceValue != null))
+			{
+				// Restore an previous values from json.
+				string json = JsonUtility.ToJson(property.managedReferenceValue);
+				result = JsonUtility.FromJson(json, type);
+			}
+#endif
+
+			if (result == null)
+			{
+				result = (type != null) ? Activator.CreateInstance(type) : null;
+			}
+			
+			property.managedReferenceValue = result;
+			return result;
+
 		}
 
 		public static Type GetType (string typeName) {
+			if (string.IsNullOrEmpty(typeName))
+			{
+				return null;
+			}
+
 			int splitIndex = typeName.IndexOf(' ');
 			var assembly = Assembly.Load(typeName.Substring(0,splitIndex));
 			return assembly.GetType(typeName.Substring(splitIndex + 1));
@@ -20,4 +44,3 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 
 	}
 }
-#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/PropertyDrawerCache.cs

@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using UnityEditor;
+using System.Reflection;
+
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
+	public static class PropertyDrawerCache
+	{
+
+		static readonly Dictionary<Type, PropertyDrawer> s_Caches = new Dictionary<Type, PropertyDrawer>();
+
+		public static bool TryGetPropertyDrawer (Type type,out PropertyDrawer drawer)
+		{
+			if (!s_Caches.TryGetValue(type,out drawer))
+			{
+				Type drawerType = GetCustomPropertyDrawerType(type);
+				drawer = (drawerType != null) ? (PropertyDrawer)Activator.CreateInstance(drawerType) : null;
+
+				s_Caches.Add(type, drawer);
+			}
+			return (drawer != null);
+		}
+
+		static Type GetCustomPropertyDrawerType (Type type)
+		{
+			Type[] interfaceTypes = type.GetInterfaces();
+
+			var types = TypeCache.GetTypesWithAttribute<CustomPropertyDrawer>();
+			foreach (Type drawerType in types)
+			{
+				var customPropertyDrawerAttributes = drawerType.GetCustomAttributes(typeof(CustomPropertyDrawer), true);
+				foreach (CustomPropertyDrawer customPropertyDrawer in customPropertyDrawerAttributes)
+				{
+					var field = customPropertyDrawer.GetType().GetField("m_Type", BindingFlags.NonPublic | BindingFlags.Instance);
+					if (field != null)
+					{
+						var fieldType = field.GetValue(customPropertyDrawer) as Type;
+						if (fieldType != null)
+						{
+							if (fieldType == type)
+							{
+								return drawerType;
+							}
+							
+							// If the property drawer also allows for being applied to child classes, check if they match
+							var useForChildrenField = customPropertyDrawer.GetType().GetField("m_UseForChildren", BindingFlags.NonPublic | BindingFlags.Instance);
+							if (useForChildrenField != null)
+							{
+								object useForChildrenValue = useForChildrenField.GetValue(customPropertyDrawer);
+								if (useForChildrenValue is bool && (bool)useForChildrenValue)
+								{
+									// Check interfaces
+									if (Array.Exists(interfaceTypes, interfaceType => interfaceType == fieldType))
+									{
+										return drawerType;
+									}
+
+									// Check derived types
+									Type baseType = type.BaseType;
+									while (baseType != null)
+									{
+										if (baseType == fieldType)
+										{
+											return drawerType;
+										}
+
+										baseType = baseType.BaseType;
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+			return null;
+		}
+
+	}
+}

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/PropertyDrawerCache.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 075fe3cc9403a8947bc325d8515e9a69
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SerializedPropertyExtensions.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+using UnityEditor;
+
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
+	public static class SerializedPropertyExtensions
+	{
+		public static IEnumerable<SerializedProperty> GetChildProperties (this SerializedProperty parent, int depth = 1)
+		{
+			parent = parent.Copy();
+
+			int depthOfParent = parent.depth;
+			var enumerator = parent.GetEnumerator();
+
+			while (enumerator.MoveNext())
+			{
+				if (enumerator.Current is not SerializedProperty childProperty)
+				{
+					continue;
+				}
+				if (childProperty.depth > (depthOfParent + depth))
+				{
+					continue;
+				}
+				yield return childProperty.Copy();
+			}
+		}
+	}
+}

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SerializedPropertyExtensions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b934aeca38cb7a24cabd6047fe0e298a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SubclassSelectorDrawer.cs

@@ -1,12 +1,12 @@
-#if UNITY_2019_3_OR_NEWER
+using System;
-using System;
 using System.Linq;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
 using UnityEditor.IMGUI.Controls;
 
-namespace MackySoft.SerializeReferenceExtensions.Editor {
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
 
 	[CustomPropertyDrawer(typeof(SubclassSelectorAttribute))]
 	public class SubclassSelectorDrawer : PropertyDrawer {
@@ -21,7 +21,7 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 		}
 
 		const int k_MaxTypePopupLineCount = 13;
-		static readonly Type k_UnityObjectType = typeof(UnityEngine.Object);
+		
 		static readonly GUIContent k_NullDisplayName = new GUIContent(TypeMenuUtility.k_NullDisplayName);
 		static readonly GUIContent k_IsNotManagedReferenceLabel = new GUIContent("The property type is not manage reference.");
 
@@ -30,31 +30,116 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 
 		SerializedProperty m_TargetProperty;
 
-		public override void OnGUI (Rect position,SerializedProperty property,GUIContent label) {
+		public override void OnGUI (Rect position, SerializedProperty property, GUIContent label)
+		{
 			EditorGUI.BeginProperty(position, label, property);
 
-			if (property.propertyType == SerializedPropertyType.ManagedReference) {
+			if (property.propertyType == SerializedPropertyType.ManagedReference)
-				// Draw the subclass selector popup.
+			{
-				Rect popupPosition = new Rect(position);
+				// Render label first to avoid label overlap for lists
-				popupPosition.width -= EditorGUIUtility.labelWidth;
+				Rect foldoutLabelRect = new Rect(position);
-				popupPosition.x += EditorGUIUtility.labelWidth;
+				foldoutLabelRect.height = EditorGUIUtility.singleLineHeight;
-				popupPosition.height = EditorGUIUtility.singleLineHeight;
+				foldoutLabelRect = EditorGUI.IndentedRect(foldoutLabelRect);
+				Rect popupPosition = EditorGUI.PrefixLabel(foldoutLabelRect, label);
 
-				if (EditorGUI.DropdownButton(popupPosition,GetTypeName(property),FocusType.Keyboard)) {
+#if UNITY_2021_3_OR_NEWER
+				// Override the label text with the ToString() of the managed reference.
+				var subclassSelectorAttribute = (SubclassSelectorAttribute)attribute;
+				if (subclassSelectorAttribute.UseToStringAsLabel && !property.hasMultipleDifferentValues)
+				{
+					object managedReferenceValue = property.managedReferenceValue;
+					if (managedReferenceValue != null)
+					{
+						label.text = managedReferenceValue.ToString();
+					}
+				}
+#endif
+
+				// Draw the subclass selector popup.
+				if (EditorGUI.DropdownButton(popupPosition, GetTypeName(property), FocusType.Keyboard))
+				{
 					TypePopupCache popup = GetTypePopup(property);
 					m_TargetProperty = property;
 					popup.TypePopup.Show(popupPosition);
 				}
 
-				// Draw the managed reference property.
+				// Draw the foldout.
-				EditorGUI.PropertyField(position,property,label,true);
+				if (!string.IsNullOrEmpty(property.managedReferenceFullTypename))
-			} else {
+				{
+					Rect foldoutRect = new Rect(position);
+					foldoutRect.height = EditorGUIUtility.singleLineHeight;
+
+#if UNITY_2022_2_OR_NEWER && !UNITY_6000_0_OR_NEWER
+					// NOTE: Position x must be adjusted.
+					// FIXME: Is there a more essential solution...?
+					// The most promising is UI Toolkit, but it is currently unable to reproduce all of SubclassSelector features. (Complete provision of contextual menu, e.g.)
+					// 2021.3: No adjustment
+					// 2022.1: No adjustment
+					// 2022.2: Adjustment required
+					// 2022.3: Adjustment required
+					// 2023.1: Adjustment required
+					// 2023.2: Adjustment required
+					// 6000.0: No adjustment
+					foldoutRect.x -= 12;
+#endif
+
+					property.isExpanded = EditorGUI.Foldout(foldoutRect, property.isExpanded, GUIContent.none, true);
+				}
+
+				// Draw property if expanded.
+				if (property.isExpanded)
+				{
+					using (new EditorGUI.IndentLevelScope())
+					{
+						// Check if a custom property drawer exists for this type.
+						PropertyDrawer customDrawer = GetCustomPropertyDrawer(property);
+						if (customDrawer != null)
+						{
+							// Draw the property with custom property drawer.
+							Rect indentedRect = position;
+							float foldoutDifference = EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
+							indentedRect.height = customDrawer.GetPropertyHeight(property, label);
+							indentedRect.y += foldoutDifference;
+							customDrawer.OnGUI(indentedRect, property, label);
+						}
+						else
+						{
+							// Draw the properties of the child elements.
+							// NOTE: In the following code, since the foldout layout isn't working properly, I'll iterate through the properties of the child elements myself.
+							// EditorGUI.PropertyField(position, property, GUIContent.none, true);
+
+							Rect childPosition = position;
+							childPosition.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
+							foreach (SerializedProperty childProperty in property.GetChildProperties())
+							{
+								float height = EditorGUI.GetPropertyHeight(childProperty, new GUIContent(childProperty.displayName, childProperty.tooltip), true);
+								childPosition.height = height;
+								EditorGUI.PropertyField(childPosition, childProperty, true);
+
+								childPosition.y += height + EditorGUIUtility.standardVerticalSpacing;
+							}
+						}
+					}
+				}
+			}
+			else
+			{
 				EditorGUI.LabelField(position, label, k_IsNotManagedReferenceLabel);
 			}
 
 			EditorGUI.EndProperty();
 		}
 
+		PropertyDrawer GetCustomPropertyDrawer (SerializedProperty property)
+		{
+			Type propertyType = ManagedReferenceUtility.GetType(property.managedReferenceFullTypename);
+			if (propertyType != null && PropertyDrawerCache.TryGetPropertyDrawer(propertyType, out PropertyDrawer drawer))
+			{
+				return drawer;
+			}
+			return null;
+		}
+
 		TypePopupCache GetTypePopup (SerializedProperty property) {
 			// Cache this string. This property internally call Assembly.GetName, which result in a large allocation.
 			string managedReferenceFieldTypename = property.managedReferenceFieldTypename;
@@ -64,13 +149,7 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 
 				Type baseType = ManagedReferenceUtility.GetType(managedReferenceFieldTypename);
 				var popup = new AdvancedTypePopup(
-					TypeCache.GetTypesDerivedFrom(baseType).Append(baseType).Where(p =>
+					TypeSearch.GetTypes(baseType),
-						(p.IsPublic || p.IsNestedPublic) &&
-						!p.IsAbstract &&
-						!p.IsGenericType &&
-						!k_UnityObjectType.IsAssignableFrom(p) &&
-						Attribute.IsDefined(p,typeof(SerializableAttribute))
-					),
 					k_MaxTypePopupLineCount,
 					state
 				);
@@ -81,7 +160,6 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 					foreach (var targetObject in m_TargetProperty.serializedObject.targetObjects) {
 						SerializedObject individualObject = new SerializedObject(targetObject);
 						SerializedProperty individualProperty = individualObject.FindProperty(m_TargetProperty.propertyPath);
-
 						object obj = individualProperty.SetManagedReference(type);
 						individualProperty.isExpanded = (obj != null);
 
@@ -128,9 +206,16 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 		}
 
 		public override float GetPropertyHeight (SerializedProperty property,GUIContent label) {
-			return EditorGUI.GetPropertyHeight(property,true);
+			PropertyDrawer customDrawer = GetCustomPropertyDrawer(property);
+			if (customDrawer != null)
+			{
+				return property.isExpanded ? EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing +  customDrawer.GetPropertyHeight(property,label):EditorGUIUtility.singleLineHeight;
+			}
+			else
+			{
+				return property.isExpanded ? EditorGUI.GetPropertyHeight(property,true) : EditorGUIUtility.singleLineHeight;
+			}
 		}
 
 	}
 }
-#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/TypeMenuUtility.cs

@@ -1,9 +1,10 @@
-#if UNITY_2019_3_OR_NEWER
+using System;
-using System;
 using System.Linq;
 using System.Collections.Generic;
+using UnityEditor;
 
-namespace MackySoft.SerializeReferenceExtensions.Editor {
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
 	public static class TypeMenuUtility {
 
 		public const string k_NullDisplayName = "<null>";
@@ -42,4 +43,3 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 
 	}
 }
-#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/TypeSearch.cs

@@ -0,0 +1,142 @@
+using System;
+using System.Linq;
+using System.Collections.Generic;
+using UnityEditor;
+using System.Reflection;
+
+namespace MackySoft.SerializeReferenceExtensions.Editor
+{
+	public static class TypeSearch
+	{
+
+#if UNITY_2023_2_OR_NEWER
+		static readonly Dictionary<Type, List<Type>> m_TypeCache = new Dictionary<Type, List<Type>>();
+#endif
+
+		public static IEnumerable<Type> GetTypes (Type baseType)
+		{
+#if UNITY_2023_2_OR_NEWER
+			// NOTE: This is a generics solution for Unity 2023.2 and later.
+			// 2023.2 because SerializeReference supports generic type instances and because the behaviour is stable.
+			if (baseType.IsGenericType)
+			{
+				return GetTypesWithGeneric(baseType);
+			}
+			else
+			{
+				return GetTypesUsingTypeCache(baseType);
+			}
+#else
+			return GetTypesUsingTypeCache(baseType);
+#endif
+		}
+
+		static IEnumerable<Type> GetTypesUsingTypeCache (Type baseType)
+		{
+			return TypeCache.GetTypesDerivedFrom(baseType)
+				.Append(baseType)
+				.Where(IsValidType);
+		}
+
+#if UNITY_2023_2_OR_NEWER
+		static IEnumerable<Type> GetTypesWithGeneric (Type baseType)
+		{
+			if (m_TypeCache.TryGetValue(baseType, out List<Type> result))
+			{
+				return result;
+			}
+
+			result = new List<Type>();
+			Type genericTypeDefinition = null;
+			Type[] targetTypeArguments = null;
+			Type[] genericTypeParameters = null;
+
+			if (baseType.IsGenericType)
+			{
+				genericTypeDefinition = baseType.GetGenericTypeDefinition();
+				targetTypeArguments = baseType.GetGenericArguments();
+				genericTypeParameters = genericTypeDefinition.GetGenericArguments();
+			}
+			else
+			{
+				genericTypeDefinition = baseType;
+				targetTypeArguments = Type.EmptyTypes;
+				genericTypeParameters = Type.EmptyTypes;
+			}
+
+			IEnumerable<Type> types = AppDomain.CurrentDomain.GetAssemblies()
+				.SelectMany(x => x.GetTypes())
+				.Where(IsValidType);
+
+			foreach (Type type in types)
+			{
+				Type[] interfaceTypes = type.GetInterfaces();
+				foreach (Type interfaceType in interfaceTypes)
+				{
+					if (!interfaceType.IsGenericType || interfaceType.GetGenericTypeDefinition() != genericTypeDefinition)
+					{
+						continue;
+					}
+
+					Type[] sourceTypeArguments = interfaceType.GetGenericArguments();
+
+					bool allParametersMatch = true;
+
+					for (int i = 0; i < genericTypeParameters.Length; i++)
+					{
+						var variance = genericTypeParameters[i].GenericParameterAttributes & GenericParameterAttributes.VarianceMask;
+
+						Type sourceTypeArgument = sourceTypeArguments[i];
+						Type targetTypeArgument = targetTypeArguments[i];
+
+						if (variance == GenericParameterAttributes.Contravariant)
+						{
+							if (!sourceTypeArgument.IsAssignableFrom(targetTypeArgument))
+							{
+								allParametersMatch = false;
+								break;
+							}
+						}
+						else if (variance == GenericParameterAttributes.Covariant)
+						{
+							if (!targetTypeArgument.IsAssignableFrom(sourceTypeArgument))
+							{
+								allParametersMatch = false;
+								break;
+							}
+						}
+						else
+						{
+							if (sourceTypeArgument != targetTypeArgument)
+							{
+								allParametersMatch = false;
+								break;
+							}
+						}
+					}
+
+					if (allParametersMatch)
+					{
+						result.Add(type);
+						break;
+					}
+				}
+			}
+
+			m_TypeCache.Add(baseType, result);
+			return result;
+		}
+#endif
+
+		static bool IsValidType (Type type)
+		{
+			return
+				(type.IsPublic || type.IsNestedPublic || type.IsNestedPrivate) &&
+				!type.IsAbstract &&
+				!type.IsGenericType &&
+				!typeof(UnityEngine.Object).IsAssignableFrom(type) &&
+				Attribute.IsDefined(type, typeof(SerializableAttribute)) &&
+				!Attribute.IsDefined(type, typeof(HideInTypeMenuAttribute));
+		}
+	}
+}

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/TypeSearch.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 5ea24172520aa2646954c1d246e7ba5d

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/AddTypeMenuAttribute.cs

@@ -1,6 +1,4 @@
-#if UNITY_2019_3_OR_NEWER
+using System;
-
-using System;
 	
 /// <summary>
 /// An attribute that overrides the name of the type displayed in the SubclassSelector popup.
@@ -35,4 +33,3 @@ public sealed class AddTypeMenuAttribute : Attribute {
 	}
 
 }
-#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/HideInTypeMenuAttribute.cs

@@ -0,0 +1,9 @@
+using System;
+
+/// <summary>
+/// An attribute that hides the type in the SubclassSelector.
+/// </summary>
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Interface, AllowMultiple = false, Inherited = false)]
+public sealed class HideInTypeMenuAttribute : Attribute {
+
+}

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/HideInTypeMenuAttribute.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 9f48f5d86a108b94a9c26381f5ce678c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/MackySoft.SerializeReferenceExtensions.asmdef

@@ -8,9 +8,7 @@
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,
-    "defineConstraints": [
+    "defineConstraints": [],
-        "UNITY_2019_3_OR_NEWER"
-    ],
     "versionDefines": [],
     "noEngineReferences": false
 }

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Runtime/SubclassSelectorAttribute.cs

@@ -1,12 +1,16 @@
-#if UNITY_2019_3_OR_NEWER
+using System;
-using System;
 using UnityEngine;
 
 /// <summary>
 /// Attribute to specify the type of the field serialized by the SerializeReference attribute in the inspector.
 /// </summary>
 [AttributeUsage(AttributeTargets.Field, AllowMultiple = false)]
-public sealed class SubclassSelectorAttribute : PropertyAttribute {
+public sealed class SubclassSelectorAttribute : PropertyAttribute
+{
+
+#if UNITY_2021_3_OR_NEWER
+	// NOTE: Use managedReferenceValue getter to invoke instance method in SubclassSelectorDrawer.
+	public bool UseToStringAsLabel { get; set; }
+#endif
 
 }
-#endif

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/package.json

@@ -1,8 +1,9 @@
 {
 	"name": "com.mackysoft.serializereference-extensions",
 	"displayName": "SerializeReference Extensions",
-	"version": "1.1.8",
+	"author": { "name": "MackySoft", "url": "https://github.com/mackysoft" },
-	"unity": "2019.4",
+	"version": "1.6.0",
+	"unity": "2021.3",
 	"description": "Provide popup to specify the type of the field serialized by the [SerializeReference] attribute in the inspector.",
 	"keywords": [ "SerializeReference", "Editor" ],
 	"license": "MIT",

MackySoft.SerializeReferenceExtensions.Editor.csproj

@@ -1,723 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
-    <LangVersion>9.0</LangVersion>
-  </PropertyGroup>
-  <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProductVersion>10.0.20506</ProductVersion>
-    <SchemaVersion>2.0</SchemaVersion>
-    <RootNamespace></RootNamespace>
-    <ProjectGuid>{D1920D53-66A8-7BB7-4FB5-7CA468A92179}</ProjectGuid>
-    <OutputType>Library</OutputType>
-    <AppDesignerFolder>Properties</AppDesignerFolder>
-    <AssemblyName>MackySoft.SerializeReferenceExtensions.Editor</AssemblyName>
-    <TargetFrameworkVersion>v4.7.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <BaseDirectory>.</BaseDirectory>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>Temp\Bin\Debug\</OutputPath>
-    <DefineConstants>UNITY_2021_3_29;UNITY_2021_3;UNITY_2021;UNITY_5_3_OR_NEWER;UNITY_5_4_OR_NEWER;UNITY_5_5_OR_NEWER;UNITY_5_6_OR_NEWER;UNITY_2017_1_OR_NEWER;UNITY_2017_2_OR_NEWER;UNITY_2017_3_OR_NEWER;UNITY_2017_4_OR_NEWER;UNITY_2018_1_OR_NEWER;UNITY_2018_2_OR_NEWER;UNITY_2018_3_OR_NEWER;UNITY_2018_4_OR_NEWER;UNITY_2019_1_OR_NEWER;UNITY_2019_2_OR_NEWER;UNITY_2019_3_OR_NEWER;UNITY_2019_4_OR_NEWER;UNITY_2020_1_OR_NEWER;UNITY_2020_2_OR_NEWER;UNITY_2020_3_OR_NEWER;UNITY_2021_1_OR_NEWER;UNITY_2021_2_OR_NEWER;UNITY_2021_3_OR_NEWER;PLATFORM_ARCH_64;UNITY_64;UNITY_INCLUDE_TESTS;ENABLE_AR;ENABLE_AUDIO;ENABLE_CACHING;ENABLE_CLOTH;ENABLE_EVENT_QUEUE;ENABLE_MICROPHONE;ENABLE_MULTIPLE_DISPLAYS;ENABLE_PHYSICS;ENABLE_TEXTURE_STREAMING;ENABLE_VIRTUALTEXTURING;ENABLE_UNET;ENABLE_LZMA;ENABLE_UNITYEVENTS;ENABLE_VR;ENABLE_WEBCAM;ENABLE_UNITYWEBREQUEST;ENABLE_WWW;ENABLE_CLOUD_SERVICES;ENABLE_CLOUD_SERVICES_ADS;ENABLE_CLOUD_SERVICES_USE_WEBREQUEST;ENABLE_CLOUD_SERVICES_CRASH_REPORTING;ENABLE_CLOUD_SERVICES_PURCHASING;ENABLE_CLOUD_SERVICES_ANALYTICS;ENABLE_CLOUD_SERVICES_UNET;ENABLE_CLOUD_SERVICES_BUILD;ENABLE_CLOUD_LICENSE;ENABLE_EDITOR_HUB_LICENSE;ENABLE_WEBSOCKET_CLIENT;ENABLE_DIRECTOR_AUDIO;ENABLE_DIRECTOR_TEXTURE;ENABLE_MANAGED_JOBS;ENABLE_MANAGED_TRANSFORM_JOBS;ENABLE_MANAGED_ANIMATION_JOBS;ENABLE_MANAGED_AUDIO_JOBS;ENABLE_MANAGED_UNITYTLS;INCLUDE_DYNAMIC_GI;ENABLE_SCRIPTING_GC_WBARRIERS;PLATFORM_SUPPORTS_MONO;RENDER_SOFTWARE_CURSOR;ENABLE_VIDEO;ENABLE_ACCELERATOR_CLIENT_DEBUGGING;PLATFORM_STANDALONE;TEXTCORE_1_0_OR_NEWER;PLATFORM_STANDALONE_WIN;UNITY_STANDALONE_WIN;UNITY_STANDALONE;ENABLE_RUNTIME_GI;ENABLE_MOVIES;ENABLE_NETWORK;ENABLE_NVIDIA;ENABLE_CRUNCH_TEXTURE_COMPRESSION;ENABLE_UNITY_GAME_SERVICES_ANALYTICS_SUPPORT;ENABLE_OUT_OF_PROCESS_CRASH_HANDLER;ENABLE_CLUSTER_SYNC;ENABLE_CLUSTERINPUT;PLATFORM_UPDATES_TIME_OUTSIDE_OF_PLAYER_LOOP;GFXDEVICE_WAITFOREVENT_MESSAGEPUMP;ENABLE_WEBSOCKET_HOST;ENABLE_MONO;NET_4_6;NET_UNITY_4_8;ENABLE_PROFILER;DEBUG;TRACE;UNITY_ASSERTIONS;UNITY_EDITOR;UNITY_EDITOR_64;UNITY_EDITOR_WIN;ENABLE_UNITY_COLLECTIONS_CHECKS;ENABLE_BURST_AOT;UNITY_TEAM_LICENSE;ENABLE_CUSTOM_RENDER_TEXTURE;ENABLE_DIRECTOR;ENABLE_LOCALIZATION;ENABLE_SPRITES;ENABLE_TERRAIN;ENABLE_TILEMAP;ENABLE_TIMELINE;ENABLE_LEGACY_INPUT_MANAGER;TEXTCORE_FONT_ENGINE_1_5_OR_NEWER;CSHARP_7_OR_LATER;CSHARP_7_3_OR_NEWER</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <NoWarn>0169</NoWarn>
-    <AllowUnsafeBlocks>False</AllowUnsafeBlocks>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>Temp\bin\Release\</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <NoWarn>0169</NoWarn>
-    <AllowUnsafeBlocks>False</AllowUnsafeBlocks>
-  </PropertyGroup>
-  <PropertyGroup>
-    <NoConfig>true</NoConfig>
-    <NoStdLib>true</NoStdLib>
-    <AddAdditionalExplicitAssemblyReferences>false</AddAdditionalExplicitAssemblyReferences>
-    <ImplicitlyExpandNETStandardFacades>false</ImplicitlyExpandNETStandardFacades>
-    <ImplicitlyExpandDesignTimeFacades>false</ImplicitlyExpandDesignTimeFacades>
-  </PropertyGroup>
-  <PropertyGroup>
-    <ProjectTypeGuids>{E097FAD1-6243-4DAD-9C02-E9B9EFC3FFC1};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
-    <UnityProjectGenerator>Package</UnityProjectGenerator>
-    <UnityProjectGeneratorVersion>2.0.18</UnityProjectGeneratorVersion>
-    <UnityProjectType>Editor:5</UnityProjectType>
-    <UnityBuildTarget>StandaloneWindows64:19</UnityBuildTarget>
-    <UnityVersion>2021.3.29f1</UnityVersion>
-  </PropertyGroup>
-  <ItemGroup>
-    <Analyzer Include="C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\Extensions\Microsoft\Visual Studio Tools for Unity\Analyzers\Microsoft.Unity.Analyzers.dll" />
-  </ItemGroup>
-  <ItemGroup>
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-    <Reference Include="System.Text.Encoding.Extensions">
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-    </Reference>
-    <Reference Include="System.Text.RegularExpressions">
-      <HintPath>C:\Program Files\Unity\Hub\Editor\2021.3.29f1\Editor\Data\NetStandard\compat\2.1.0\shims\netstandard\System.Text.RegularExpressions.dll</HintPath>
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-    <Reference Include="System.Threading">
-      <HintPath>C:\Program Files\Unity\Hub\Editor\2021.3.29f1\Editor\Data\NetStandard\compat\2.1.0\shims\netstandard\System.Threading.dll</HintPath>
-    </Reference>
-    <Reference Include="System.Threading.Overlapped">
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-    <Reference Include="System.Threading.Tasks">
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-    <Reference Include="System.Threading.Tasks.Extensions">
-      <HintPath>C:\Program Files\Unity\Hub\Editor\2021.3.29f1\Editor\Data\NetStandard\compat\2.1.0\shims\netstandard\System.Threading.Tasks.Extensions.dll</HintPath>
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-    <Reference Include="System.Threading.Tasks.Parallel">
-      <HintPath>C:\Program Files\Unity\Hub\Editor\2021.3.29f1\Editor\Data\NetStandard\compat\2.1.0\shims\netstandard\System.Threading.Tasks.Parallel.dll</HintPath>
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-    <Reference Include="System.Threading.Thread">
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-    <Reference Include="System.Threading.ThreadPool">
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-    <Reference Include="System.Threading.Timer">
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-    <Reference Include="System.ValueTuple">
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-    <Reference Include="System.Xml.ReaderWriter">
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-    <Reference Include="System.Xml.XDocument">
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-    <Reference Include="System.Xml.XmlDocument">
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-  </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Target Name="GenerateTargetFrameworkMonikerAttribute" />
-  <!-- To modify your build process, add your task inside one of the targets below and uncomment it.
-       Other similar extension points exist, see Microsoft.Common.targets.
-  <Target Name="BeforeBuild">
-  </Target>
-  <Target Name="AfterBuild">
-  </Target>
-  -->
-</Project>

Packages/manifest.json

@@ -1,7 +1,7 @@
 {
   "dependencies": {
-    "com.unity.ide.rider": "3.0.24",
+    "com.unity.ide.rider": "3.0.28",
-    "com.unity.ide.visualstudio": "2.0.18",
+    "com.unity.ide.visualstudio": "2.0.22",
     "com.unity.ide.vscode": "1.2.5",
     "com.unity.test-framework": "1.1.33",
     "com.unity.modules.ai": "1.0.0",

Packages/packages-lock.json

@@ -8,7 +8,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.ide.rider": {
-      "version": "3.0.24",
+      "version": "3.0.28",
       "depth": 0,
       "source": "registry",
       "dependencies": {
@@ -17,7 +17,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.ide.visualstudio": {
-      "version": "2.0.18",
+      "version": "2.0.22",
       "depth": 0,
       "source": "registry",
       "dependencies": {

ProjectSettings/EditorBuildSettings.asset

@@ -4,5 +4,8 @@
 EditorBuildSettings:
   m_ObjectHideFlags: 0
   serializedVersion: 2
-  m_Scenes: []
+  m_Scenes:
+  - enabled: 1
+    path: Assets/Example/Example.unity
+    guid: edbf6cf086198fc4dbd84a5a8d648144
   m_configObjects: {}

README.md

@@ -15,9 +15,19 @@ The `SubclassSelector` attribute allows you to easily set subclasses of those ab
 - Easily set subclass by popup.
 - **[New]** Type finding by fuzzy finder.
 - **[New]** Override the type name and path by the `AddTypeMenu` attribute.
+- **[New]** Available `CustomPropertyDrawer` for subclasses.
+- **[New]** Restore values of previous object from JSON when subclass is changed. (required Unity 2021.3 or later)
+- **[New]** Copy & Paste the subclass properties. (required Unity 2021.3 or later)
+- **[New]** Clear & reset the subclass properties. (required Unity 2021.3 or later)
+
+> See below for the reason for the limitation of versions less than Unity 2021.3.
+> 
+> https://blog.unity.com/engine-platform/serializereference-improvements-in-unity-2021-lts
 
 ## 📥 Installation
 
+#### Install via `.unitypackage`
+
 Download any version from releases.
 
 Releases: https://github.com/mackysoft/Unity-SerializeReferenceExtensions/releases
@@ -26,10 +36,17 @@ Releases: https://github.com/mackysoft/Unity-SerializeReferenceExtensions/releas
 
 Or, you can add this package by opening PackageManager and entering
 
-`https://github.com/mackysoft/Unity-SerializeReferenceExtensions.git?path=Assets/MackySoft/MackySoft.SerializeReferenceExtensions`
+```
+https://github.com/mackysoft/Unity-SerializeReferenceExtensions.git?path=Assets/MackySoft/MackySoft.SerializeReferenceExtensions
+```
 
 from the `Add package from git URL` option.
 
+If you are specifying a version, enter `#{VERSION}` at the end, as shown below.
+
+```
+https://github.com/mackysoft/Unity-SerializeReferenceExtensions.git?path=Assets/MackySoft/MackySoft.SerializeReferenceExtensions#1.1.9
+```
 
 #### Install via Open UPM
 
@@ -122,7 +139,7 @@ public struct StructCommand : ICommand {
 
 The `SubclassSelector` attribute supports types that meet the following conditions.
 
-- Public
+- Public or nested private
 - Not abstract
 - Not generic
 - Not unity object