Initial files

Assets/Scripts/RuntimeGizmo/Objects/Commands/HandleTransformCommand.cs

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+using RuntimeGizmos;
+using UnityEngine;
+
+public class HandleTransformCommand : TransformCommand
+{
+    protected UIHandle _handle;
+    protected int _frame;
+
+    public HandleTransformCommand(TransformGizmo transformGizmo, Transform transform) : base(transformGizmo, transform.GetComponent<UIHandle>().Target)
+    {
+        _frame = TimelineController.Instance.CurrentFrame;
+        _handle = transform.GetComponent<UIHandle>();
+    }
+
+    public HandleTransformCommand(TransformGizmo transformGizmo, HandleUndoData data) : base(transformGizmo, data.NewPosition)
+    {
+        _frame = TimelineController.Instance.CurrentFrame;
+        _handle = data.Handle;
+        oldValues = new TransformValues() { position = data.OldPosition.Position, rotation = Quaternion.Euler(data.OldPosition.Rotation), scale = data.OldPosition.Scale };
+        newValues = new TransformValues() { position = transform.position, rotation = transform.rotation, scale = transform.localScale };
+    }
+
+    public override void Execute()
+    {
+        TimelineController.SetCurrentFrame(_frame);
+        base.Execute();
+        _handle.Owner.SetKeyframe();
+    }
+
+    public override void UnExecute()
+    {
+        TimelineController.SetCurrentFrame(_frame);
+        base.UnExecute();
+        _handle.Owner.SetKeyframe();
+    }
+}

Assets/Scripts/RuntimeGizmo/Objects/Commands/HandleTransformCommand.cs.meta

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Assets/Scripts/RuntimeGizmo/Objects/Commands/SelectCommand.cs

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+using System;
+using CommandUndoRedo;
+using UnityEngine;
+using System.Collections.Generic;
+
+namespace RuntimeGizmos
+{
+	public abstract class SelectCommand : ICommand
+	{
+		protected Transform target;
+		protected TransformGizmo transformGizmo;
+
+        public SelectCommand(TransformGizmo transformGizmo, Transform target)
+		{
+			this.transformGizmo = transformGizmo;
+			this.target = target;
+		}
+
+		public abstract void Execute();
+		public abstract void UnExecute();
+	}
+
+	public class AddTargetCommand : SelectCommand
+	{
+		List<Transform> targetRoots = new List<Transform>();
+
+		public AddTargetCommand(TransformGizmo transformGizmo, Transform target, List<Transform> targetRoots) : base(transformGizmo, target)
+		{
+			//Since we might have had a child selected and then selected the parent, the child would have been removed from the selected,
+			//so we store all the targetRoots before we add so that if we undo we can properly have the children selected again.
+			this.targetRoots.AddRange(targetRoots);
+		}
+
+		public override void Execute()
+		{
+			transformGizmo.AddTarget(target, false);
+		}
+
+		public override void UnExecute()
+		{
+			transformGizmo.RemoveTarget(target, false);
+
+			for(int i = 0; i < targetRoots.Count; i++)
+			{
+				transformGizmo.AddTarget(targetRoots[i], false);
+			}
+		}
+	}
+
+	public class RemoveTargetCommand : SelectCommand
+	{
+		public RemoveTargetCommand(TransformGizmo transformGizmo, Transform target) : base(transformGizmo, target) {}
+
+		public override void Execute()
+		{
+			transformGizmo.RemoveTarget(target, false);
+		}
+
+		public override void UnExecute()
+		{
+			transformGizmo.AddTarget(target, false);
+		}
+	}
+
+	public class ClearTargetsCommand : SelectCommand
+	{
+		List<Transform> targetRoots = new List<Transform>();
+
+		public ClearTargetsCommand(TransformGizmo transformGizmo, List<Transform> targetRoots) : base(transformGizmo, null)
+		{
+			this.targetRoots.AddRange(targetRoots);
+		}
+
+		public override void Execute()
+		{
+			transformGizmo.ClearTargets(false);
+		}
+
+		public override void UnExecute()
+		{
+			for(int i = 0; i < targetRoots.Count; i++)
+			{
+				transformGizmo.AddTarget(targetRoots[i], false);
+			}
+		}
+	}
+
+	public class ClearAndAddTargetCommand : SelectCommand
+	{
+		List<Transform> targetRoots = new List<Transform>();
+
+		public ClearAndAddTargetCommand(TransformGizmo transformGizmo, Transform target, List<Transform> targetRoots) : base(transformGizmo, target)
+		{
+			this.targetRoots.AddRange(targetRoots);
+		}
+
+		public override void Execute()
+		{
+			transformGizmo.ClearTargets(false);
+			transformGizmo.AddTarget(target, false);
+		}
+
+		public override void UnExecute()
+		{
+			transformGizmo.RemoveTarget(target, false);
+
+			for(int i = 0; i < targetRoots.Count; i++)
+			{
+				transformGizmo.AddTarget(targetRoots[i], false);
+			}
+		}
+	}
+}

Assets/Scripts/RuntimeGizmo/Objects/Commands/SelectCommand.cs.meta

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Assets/Scripts/RuntimeGizmo/Objects/Commands/TransformCommand.cs

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+using System;
+using CommandUndoRedo;
+using UnityEngine;
+
+namespace RuntimeGizmos
+{
+	public class TransformCommand : ICommand
+	{
+		protected TransformValues newValues;
+        protected TransformValues oldValues;
+
+        protected Transform transform;
+        protected TransformGizmo transformGizmo;
+
+        public TransformCommand(TransformGizmo transformGizmo, Transform transform)
+		{
+			this.transformGizmo = transformGizmo;
+			this.transform = transform;
+
+			oldValues = new TransformValues() {position=transform.position, rotation=transform.rotation, scale=transform.localScale};
+        }
+
+        public virtual void StoreNewTransformValues()
+		{
+			newValues = new TransformValues() {position=transform.position, rotation=transform.rotation, scale=transform.localScale};
+		}
+		
+		public virtual void Execute()
+		{
+			transform.position = newValues.position;
+			transform.rotation = newValues.rotation;
+			transform.localScale = newValues.scale;
+
+			transformGizmo.SetPivotPoint();
+		}
+
+		public virtual void UnExecute()
+		{
+			transform.position = oldValues.position;
+			transform.rotation = oldValues.rotation;
+			transform.localScale = oldValues.scale;
+
+			transformGizmo.SetPivotPoint();
+		}
+
+        protected struct TransformValues
+		{
+			public Vector3 position;
+			public Quaternion rotation;
+			public Vector3 scale;
+		}
+	}
+}

Assets/Scripts/RuntimeGizmo/Objects/Commands/TransformCommand.cs.meta

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