feat: initial commit
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138
Assets/Common/Serialization/Runtime/SerializableInterface.cs
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138
Assets/Common/Serialization/Runtime/SerializableInterface.cs
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#region License and Information
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/*****
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* Provides a serializable wrapper that allows you to store a reference to
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* a serialized UnityEngine.Object that implement a certain interface.
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* The "Instance" property provides direct easy access to the serialized reference.
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* This should work with Components as well as ScriptableObjects.
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* It ships with a convenient property drawer that should streamline the usage.
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*
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* Copyright (c) 2023 Bunny83
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*****/
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#endregion License and Information
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using System;
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using System.Collections.Generic;
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using UnityEditor;
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using UnityEngine;
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using Object = UnityEngine.Object;
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namespace JoeSiu.Common.Serialization.Runtime
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{
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[Serializable]
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public class SerializableInterface<T> where T : class
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{
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[SerializeField]
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private Object _obj;
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private T _value;
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public SerializableInterface()
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{
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}
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public SerializableInterface(T value)
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{
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SetValue(value);
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}
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public T Value
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{
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get => GetValue();
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set => SetValue(value);
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}
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public T GetValue()
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{
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if (_value != null && (object)_value == _obj) return _value;
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if (_obj == null) SetValue(null);
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else if (_obj is T inst || _obj is GameObject go && go.TryGetComponent(out inst)) _value = inst;
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else SetValue(null);
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return _value;
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}
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private void SetValue(T value)
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{
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_value = value;
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_obj = _value as Object;
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}
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}
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#if UNITY_EDITOR
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[CustomPropertyDrawer(typeof(SerializableInterface<>), true)]
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public class SerializableInterfacePropertyDrawer : PropertyDrawer
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{
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private Type _genericType;
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private readonly List<Component> _list = new();
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public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
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{
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if (_genericType == null)
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{
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var fieldType = fieldInfo.FieldType;
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if (fieldType.IsGenericType && fieldType.GetGenericTypeDefinition() == typeof(List<>))
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// when used in a List<>, grab the actual type from the generic argument of the List
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fieldType = fieldInfo.FieldType.GetGenericArguments()[0];
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else if (fieldType.IsArray)
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// when used in an array, grab the actual type from the element type.
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fieldType = fieldType.GetElementType();
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var types = fieldType?.GetGenericArguments();
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if (types is { Length: 1 }) _genericType = types[0];
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}
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var obj = property.FindPropertyRelative("_obj");
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EditorGUI.BeginChangeCheck();
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var newObj = EditorGUI.ObjectField(position, label, obj.objectReferenceValue, typeof(Object), true);
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if (!EditorGUI.EndChangeCheck()) return;
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if (newObj == null) obj.objectReferenceValue = null;
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else if (_genericType != null && _genericType.IsAssignableFrom(newObj.GetType())) obj.objectReferenceValue = newObj;
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else if (newObj is GameObject go)
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{
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_list.Clear();
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go.GetComponents(_genericType, _list);
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if (_list.Count == 1)
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{
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obj.objectReferenceValue = _list[0];
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}
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else
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{
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var m = new GenericMenu();
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var n = 1;
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foreach (var item in _list)
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m.AddItem(new GUIContent(n++ + " " + item.GetType().Name), false, a =>
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{
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obj.objectReferenceValue = (Object)a;
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obj.serializedObject.ApplyModifiedProperties();
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}, item);
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m.ShowAsContext();
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}
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}
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else
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{
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Debug.LogWarning("Dragged object is not compatible with " + _genericType?.Name);
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}
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}
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}
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#endif
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}
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