Add VRChat and GitHub packages to Unity project

Assets/Udon/Serialization/OdinSerializer/Unity Integration/OdinPrefabSerializationEditorUtility.cs

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+//-----------------------------------------------------------------------
+// <copyright file="OdinPrefabSerializationEditorUtility.cs" company="Sirenix IVS">
+// Copyright (c) 2018 Sirenix IVS
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+//-----------------------------------------------------------------------
+
+//#define PREFAB_DEBUG
+#if UNITY_EDITOR
+namespace VRC.Udon.Serialization.OdinSerializer
+{
+    using System;
+    using System.Reflection;
+    using UnityEditor;
+    using UnityEngine;
+
+    public static class OdinPrefabSerializationEditorUtility
+    {
+        private static bool? hasNewPrefabWorkflow;
+        private static MethodInfo PrefabUtility_GetPrefabAssetType_Method = typeof(PrefabUtility).GetMethod("GetPrefabAssetType", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(UnityEngine.Object) }, null);
+        private static MethodInfo PrefabUtility_GetPrefabParent_Method = typeof(PrefabUtility).GetMethod("GetPrefabParent", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(UnityEngine.Object) }, null);
+        private static MethodInfo PrefabUtility_GetCorrespondingObjectFromSource_Method = typeof(PrefabUtility).GetMethod("GetCorrespondingObjectFromSource", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(UnityEngine.Object) }, null);
+        private static MethodInfo PrefabUtility_GetPrefabType_Method = typeof(PrefabUtility).GetMethod("GetPrefabType", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(UnityEngine.Object) }, null);
+
+        public static bool HasNewPrefabWorkflow
+        {
+            get
+            {
+                if (hasNewPrefabWorkflow == null)
+                {
+                    hasNewPrefabWorkflow = DetectNewPrefabWorkflow();
+                }
+
+                return hasNewPrefabWorkflow.Value;
+            }
+        }
+
+        private static bool DetectNewPrefabWorkflow()
+        {
+            try
+            {
+                var method = typeof(PrefabUtility).GetMethod("GetPrefabType", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(UnityEngine.Object) }, null);
+
+                if (method == null) return true;
+
+                if (method.IsDefined(typeof(ObsoleteAttribute), false))
+                {
+                    return true;
+                }
+
+                return false;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        public static bool ObjectIsPrefabInstance(UnityEngine.Object unityObject)
+        {
+            if (PrefabUtility_GetPrefabType_Method != null)
+            {
+                try
+                {
+                    int prefabType = Convert.ToInt32((Enum)PrefabUtility_GetPrefabType_Method.Invoke(null, new object[] { unityObject }));
+                    // PrefabType.PrefabInstance == 3
+                    if (prefabType == 3) return true;
+                }
+                catch (Exception) { }
+            }
+
+            if (PrefabUtility_GetPrefabAssetType_Method != null)
+            {
+                int prefabAssetType = Convert.ToInt32((Enum)PrefabUtility_GetPrefabAssetType_Method.Invoke(null, new object[] { unityObject }));
+                // 1 = PrefabAssetType.Regular
+                // 3 = PrefabAssetType.Variant
+                return prefabAssetType == 1 || prefabAssetType == 3;
+            }
+
+            if (PrefabUtility_GetPrefabType_Method == null && PrefabUtility_GetPrefabAssetType_Method == null)
+            {
+                Debug.LogError("Neither PrefabUtility.GetPrefabType or PrefabUtility.GetPrefabAssetType methods could be located. Prefab functionality will likely be broken in this build of Odin.");
+            }
+
+            return GetCorrespondingObjectFromSource(unityObject) != null;
+        }
+
+        public static bool ObjectHasNestedOdinPrefabData(UnityEngine.Object unityObject)
+        {
+            if (!HasNewPrefabWorkflow) return false;
+            if (!(unityObject is ISupportsPrefabSerialization)) return false;
+            var prefab = GetCorrespondingObjectFromSource(unityObject);
+            return IsOdinSerializedPrefabInstance(prefab);
+        }
+
+        private static bool IsOdinSerializedPrefabInstance(UnityEngine.Object unityObject)
+        {
+            if (!(unityObject is ISupportsPrefabSerialization)) return false;
+            return GetCorrespondingObjectFromSource(unityObject) != null;
+        }
+
+        public static UnityEngine.Object GetCorrespondingObjectFromSource(UnityEngine.Object unityObject)
+        {
+            if (PrefabUtility_GetCorrespondingObjectFromSource_Method != null)
+            {
+                return (UnityEngine.Object)PrefabUtility_GetCorrespondingObjectFromSource_Method.Invoke(null, new object[] { unityObject });
+            }
+
+            if (PrefabUtility_GetPrefabParent_Method != null)
+            {
+                return (UnityEngine.Object)PrefabUtility_GetPrefabParent_Method.Invoke(null, new object[] { unityObject });
+            }
+
+            Debug.LogError("Neither PrefabUtility.GetCorrespondingObjectFromSource or PrefabUtility.GetPrefabParent methods could be located. Prefab functionality will be broken in this build of Odin.");
+            return null;
+        }
+    }
+}
+#endif