maint: added livewatch asset

Assets/Plugins/LiveWatchLite/Scripts/Editor/Utilities/EditorProperty.cs

@@ -0,0 +1,71 @@
+using System;
+using UnityEditor;
+using UnityEngine;
+
+namespace Ingvar.LiveWatch.Editor
+{
+    public abstract class EditorProperty<T>
+    {
+        public string Key { get; }
+        public T Value
+        {
+            get => value;
+            set
+            {
+                if (IsEqual(this.value, value))
+                    return;
+
+                this.value = value;
+                Save(value);
+            }
+        }
+
+        public EditorPropertyDrawer<T> PropertyDrawer
+        {
+            get
+            {
+                if (propertyDrawer != null)
+                    return propertyDrawer;
+
+                propertyDrawer = GetDrawer();
+                return propertyDrawer;
+            }
+        }
+        
+        private T value;
+        private readonly T defaultValue;
+        private EditorPropertyDrawer<T> propertyDrawer;
+        
+        public EditorProperty(string key, T defaultValue)
+        {
+            this.defaultValue = defaultValue;
+            
+            Key = key;
+            value = EditorPrefs.HasKey(key) ? Load() : defaultValue;
+        }
+
+        public void SetToDefault()
+        {
+            Value = defaultValue;
+        }
+        
+        protected abstract bool IsEqual(T left, T right);
+        protected abstract T Load();
+        protected abstract void Save(T value);
+        protected abstract EditorPropertyDrawer<T> GetDrawer();
+
+        public static implicit operator T(EditorProperty<T> p) => p.Value;
+    }
+    
+    public abstract class EditorPropertyDrawer<T>
+    {
+        protected EditorProperty<T> Property { get; }
+        
+        public EditorPropertyDrawer(EditorProperty<T> property)
+        {
+            Property = property;
+        }
+        
+        public abstract void Draw(params GUILayoutOption[] options);
+    }
+}