feat: Update package.json to 1.2.2

Fixed a bug when trying to deserialize a null type with FromJson.

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/CopyAndPasteProperty.cs

@@ -1,4 +1,5 @@
-#if UNITY_2019_3_OR_NEWER
+// NOTE: managedReferenceValue getter is available only in Unity 2021.3 or later.
+#if UNITY_2021_3_OR_NEWER
 using UnityEditor;
 using UnityEngine;
 

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

@@ -8,14 +8,19 @@ namespace MackySoft.SerializeReferenceExtensions.Editor {
 	public static class ManagedReferenceUtility {
 
 		public static object SetManagedReference (this SerializedProperty property,Type type) {
-			object result;
-			if (property.managedReferenceValue != null)
+			object result = null;
+
+#if UNITY_2021_3_OR_NEWER
+			// NOTE: managedReferenceValue getter is available only in Unity 2021.3 or later.
+			if (property.managedReferenceValue != null && type != null)
 			{
 				// Restore an previous values from json.
 				string json = JsonUtility.ToJson(property.managedReferenceValue);
 				result = JsonUtility.FromJson(json, type);
 			}
-			else
+#endif
+
+			if (result == null)
 			{
 				result = (type != null) ? Activator.CreateInstance(type) : null;
 			}

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

@@ -25,6 +25,8 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 
 		static Type GetCustomPropertyDrawerType (Type type)
 		{
+			Type[] interfaceTypes = type.GetInterfaces();
+			
 			foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies())
 			{
 				foreach (Type drawerType in assembly.GetTypes())
@@ -36,9 +38,39 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 						if (field != null)
 						{
 							var fieldType = field.GetValue(customPropertyDrawer) as Type;
-							if (fieldType != null && fieldType == type)
+							if (fieldType != null)
 							{
-								return drawerType;
+								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;
+										}
+									}
+								}
 							}
 						}
 					}

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

@@ -35,12 +35,14 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 			EditorGUI.BeginProperty(position,label,property);
 
 			if (property.propertyType == SerializedPropertyType.ManagedReference) {
-				// Draw the subclass selector popup.
-				Rect popupPosition = new Rect(position);
-				popupPosition.width -= EditorGUIUtility.labelWidth;
-				popupPosition.x += EditorGUIUtility.labelWidth;
-				popupPosition.height = EditorGUIUtility.singleLineHeight;
 
+				// render label first to avoid label overlap for lists
+				Rect foldoutLabelRect = new Rect(position);
+				foldoutLabelRect.height = EditorGUIUtility.singleLineHeight;
+				foldoutLabelRect.x += EditorGUI.indentLevel * 12;
+				Rect popupPosition = EditorGUI.PrefixLabel(foldoutLabelRect, label);
+
+				// Draw the subclass selector popup.
 				if (EditorGUI.DropdownButton(popupPosition,GetTypeName(property),FocusType.Keyboard)) {
 					TypePopupCache popup = GetTypePopup(property);
 					m_TargetProperty = property;
@@ -54,8 +56,8 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 					// Draw the property with custom property drawer.
 					Rect foldoutRect = new Rect(position);
 					foldoutRect.height = EditorGUIUtility.singleLineHeight;
-					property.isExpanded = EditorGUI.Foldout(foldoutRect, property.isExpanded, label, true);
-					
+					property.isExpanded = EditorGUI.Foldout(foldoutRect, property.isExpanded, GUIContent.none, true);
+
 					if (property.isExpanded)
 					{
 						using (new EditorGUI.IndentLevelScope())
@@ -70,7 +72,7 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 				}
 				else
 				{
-					EditorGUI.PropertyField(position, property, label, true);
+					EditorGUI.PropertyField(position, property, GUIContent.none, true);
 				}
 			} else {
 				EditorGUI.LabelField(position,label,k_IsNotManagedReferenceLabel);
@@ -95,7 +97,7 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 
 			if (!m_TypePopups.TryGetValue(managedReferenceFieldTypename,out TypePopupCache result)) {
 				var state = new AdvancedDropdownState();
-				
+
 				Type baseType = ManagedReferenceUtility.GetType(managedReferenceFieldTypename);
 				var popup = new AdvancedTypePopup(
 					TypeCache.GetTypesDerivedFrom(baseType).Append(baseType).Where(p =>
@@ -118,7 +120,7 @@ namespace MackySoft.SerializeReferenceExtensions.Editor
 
 						object obj = individualProperty.SetManagedReference(type);
 						individualProperty.isExpanded = (obj != null);
-						
+
 						individualObject.ApplyModifiedProperties();
 						individualObject.Update();
 					}

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/package.json

@@ -2,7 +2,7 @@
 	"name": "com.mackysoft.serializereference-extensions",
 	"displayName": "SerializeReference Extensions",
 	"author": { "name": "MackySoft", "url": "https://github.com/mackysoft" },
-	"version": "1.2.0",
+	"version": "1.2.2",
 	"unity": "2021.3",
 	"description": "Provide popup to specify the type of the field serialized by the [SerializeReference] attribute in the inspector.",
 	"keywords": [ "SerializeReference", "Editor" ],

README.md

@@ -15,9 +15,18 @@ 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)
+
+> 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 +35,17 @@ 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