mattercontrol/MatterControlLib/DesignTools/Operations/TransformWrapperObject3D.cs

/*
Copyright (c) 2018, Lars Brubaker, John Lewin
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

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   list of conditions and the following disclaimer.
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   and/or other materials provided with the distribution.

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*/

using System;
using System.Collections.Generic;
using System.Linq;
using MatterHackers.Agg;
using MatterHackers.Agg.UI;
using MatterHackers.DataConverters3D;
using MatterHackers.DataConverters3D.UndoCommands;
using MatterHackers.Localizations;
using MatterHackers.MatterControl.PartPreviewWindow.View3D;
using Newtonsoft.Json;
using static MatterHackers.DataConverters3D.Object3DExtensions;

namespace MatterHackers.MatterControl.DesignTools.Operations
{
	public abstract class TransformWrapperObject3D : Object3D
	{
		public TransformWrapperObject3D()
		{
			Name = "Transform Wrapper".Localize();
		}

		public override bool CanFlatten => true;

		[JsonIgnore]
		public AscendableSafeList<IObject3D> UntransformedChildren
		{
			get
			{
				if (ItemWithTransform?.Children.Count > 0)
				{
					return ItemWithTransform.Children;
				}

				return null;
			}
		}

		protected IObject3D ItemWithTransform
		{
			get
			{
				if (Children.Count > 0)
				{
					return Children.First();
				}

				return null;
			}
		}

		public override void Flatten(UndoBuffer undoBuffer)
		{
			using (RebuildLock())
			{
				// push our matrix into our children
				foreach (var child in this.Children)
				{
					child.Matrix *= this.Matrix;
				}

				// push child into children
				foreach (var item in UntransformedChildren)
				{
					item.Matrix *= ItemWithTransform.Matrix;
				}

				// add our children to our parent and remove from parent
				this.Parent.Children.Modify(list =>
				{
					list.Remove(this);
					list.AddRange(ItemWithTransform.Children);
				});
			}

			Invalidate(InvalidateType.Children);
		}

		public override void Remove(UndoBuffer undoBuffer)
		{
			using (RebuildLock())
			{
				// push our matrix into inner children
				foreach (var child in ItemWithTransform.Children)
				{
					child.Matrix *= this.Matrix;
				}

				// add inner children to our parent and remove from parent
				this.Parent.Children.Modify(list =>
				{
					list.Remove(this);
					list.AddRange(ItemWithTransform.Children);
				});
			}

			Invalidate(InvalidateType.Children);
		}

		public virtual void WrapSelectedItemAndSelect(InteractiveScene scene)
		{
			var items = scene.GetSelectedItems();

			var parent = items.First().Parent;
			RebuildLocks parentLock = (parent == null) ? null : parent.RebuilLockAll();

			var firstChild = new Object3D();
			this.Children.Add(firstChild);

			// if the items we are replacing are already in a list
			if (parent != null)
			{
				if (scene.UndoBuffer != null)
				{
					foreach (var item in items)
					{
						firstChild.Children.Add(item.Clone());
					}

					var replace = new ReplaceCommand(items, new[] { this });
					scene.UndoBuffer.AddAndDo(replace);
				}
				else
				{
					parent.Children.Modify(list =>
					{
						foreach (var item in items)
						{
							list.Remove(item);
							firstChild.Children.Add(item);
						}

						list.Add(this);
					});
				}
			}
			else // just add them
			{
				firstChild.Children.Modify(list =>
				{
					list.AddRange(items);
				});
			}

			parentLock?.Dispose();

			// and select this
			var rootItem = this.Parents().Where(i => scene.Children.Contains(i)).FirstOrDefault();
			if (rootItem != null)
			{
				scene.SelectedItem = rootItem;
			}

			scene.SelectedItem = this;


			parent?.Invalidate(new InvalidateArgs(parent, InvalidateType.Children));
		}

		public virtual void WrapItems(IEnumerable<IObject3D> items, UndoBuffer undoBuffer = null)
		{
			var parent = items.First().Parent;
			RebuildLocks parentLock = (parent == null) ? null : parent.RebuilLockAll();

			var firstChild = new Object3D();
			this.Children.Add(firstChild);

			// if the items we are replacing are already in a list
			if (parent != null)
			{
				if (undoBuffer != null)
				{
					foreach (var item in items)
					{
						firstChild.Children.Add(item.Clone());
					}
					var replace = new ReplaceCommand(items, new[] { this });
					undoBuffer.AddAndDo(replace);
				}
				else
				{
					parent.Children.Modify(list =>
					{
						foreach (var item in items)
						{
							list.Remove(item);
							firstChild.Children.Add(item);
						}
						list.Add(this);
					});
				}
			}
			else // just add them
			{
				firstChild.Children.Modify(list =>
				{
					list.AddRange(items);
				});
			}

			parentLock?.Dispose();

			parent?.Invalidate(new InvalidateArgs(parent, InvalidateType.Children));
		}
	}
}