riversong code showcase

Source/Riversong/Game/EditTools/EditTool.cs

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+using System;
+using System.Collections.Generic;
+using Cysharp.Threading.Tasks;
+using Unity.Mathematics;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public abstract class EditTool : IDisposable
+    {
+        protected EditTool(IServiceLocator serviceLocator)
+        {
+            ServiceLocator = serviceLocator;
+        }
+
+        protected IServiceLocator ServiceLocator { get; }
+
+        public List<(int2, TileHighlightType)> AffectedTiles { get; } = new();
+
+        public virtual UniTask InitializeAsync()
+        {
+            return UniTask.CompletedTask;
+        }
+
+        public virtual void Dispose()
+        {
+        }
+
+        public virtual void OnEnabled()
+        {
+        }
+
+        public virtual void OnDisabled()
+        {
+        }
+
+        public virtual void Update()
+        {
+        }
+
+        public virtual void GetDeleteGameObjectsPreviewInfo(out DeletedGameObjectsFilter filter, out TileRect rect)
+        {
+            filter = DeletedGameObjectsFilter.None;
+            rect = TileRect.Empty;
+        }
+    }
+}