Feature/hide in type menu

.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
 
@@ -39,7 +39,7 @@ jobs:
 
       # Upload
       - name: Upload .unitypackage
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: Unity Package
           path: Build

Assets/Example/Example.cs

@@ -42,6 +42,17 @@ public Grape ()
 	}
 }
 
+[Serializable]
+[HideInTypeMenu]
+public class Banana : Food
+{
+	public Banana ()
+	{
+		name = "Banana";
+		kcal = 100f;
+	}
+}
+
 public class Example : MonoBehaviour
 {
 

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

@@ -22,7 +22,7 @@ public TypePopupCache (AdvancedTypePopup typePopup,AdvancedDropdownState state)
 		}
 
 		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.");
 
@@ -129,13 +129,7 @@ TypePopupCache GetTypePopup (SerializedProperty property) {
 
 				Type baseType = ManagedReferenceUtility.GetType(managedReferenceFieldTypename);
 				var popup = new AdvancedTypePopup(
-					TypeCache.GetTypesDerivedFrom(baseType).Append(baseType).Where(p =>
-						(p.IsPublic || p.IsNestedPublic || p.IsNestedPrivate) &&
-						!p.IsAbstract &&
-						!p.IsGenericType &&
-						!k_UnityObjectType.IsAssignableFrom(p) &&
-						Attribute.IsDefined(p,typeof(SerializableAttribute))
-					),
+					TypeMenuUtility.GetTypes(baseType),
 					k_MaxTypePopupLineCount,
 					state
 				);

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

@@ -2,11 +2,25 @@
 using System;
 using System.Linq;
 using System.Collections.Generic;
+using UnityEditor;
 
 namespace MackySoft.SerializeReferenceExtensions.Editor {
 	public static class TypeMenuUtility {
 
 		public const string k_NullDisplayName = "<null>";
+		static readonly Type k_UnityObjectType = typeof(UnityEngine.Object);
+
+		public static IEnumerable<Type> GetTypes (Type baseType)
+		{
+			return TypeCache.GetTypesDerivedFrom(baseType).Append(baseType).Where(p =>
+				(p.IsPublic || p.IsNestedPublic || p.IsNestedPrivate) &&
+				!p.IsAbstract &&
+				!p.IsGenericType &&
+				!k_UnityObjectType.IsAssignableFrom(p) &&
+				Attribute.IsDefined(p, typeof(SerializableAttribute)) &&
+				!Attribute.IsDefined(p, typeof(HideInTypeMenuAttribute))
+			);
+		}
 
 		public static AddTypeMenuAttribute GetAttribute (Type type) {
 			return Attribute.GetCustomAttribute(type,typeof(AddTypeMenuAttribute)) as AddTypeMenuAttribute;

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

@@ -0,0 +1,11 @@
+#if UNITY_2019_3_OR_NEWER
+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 {
+
+}
+#endif