mattercontrol/PartPreviewWindow/View3D/Actions/MeshWrapperObject3D.cs

/*
Copyright (c) 2017, Lars Brubaker, John Lewin
All rights reserved.

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

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*/

using MatterHackers.Agg.UI;
using MatterHackers.DataConverters3D;
using MatterHackers.DataConverters3D.UndoCommands;
using MatterHackers.MatterControl.DesignTools.Operations;
using MatterHackers.PolygonMesh;
using System.Collections.Generic;
using System.Linq;
using System.Threading;

namespace MatterHackers.MatterControl.PartPreviewWindow.View3D
{
	public abstract class MeshWrapperObject3D : Object3D
	{
		public MeshWrapperObject3D()
		{
		}

		public override bool CanApply => true;
		public override bool CanRemove => true;

		public override void Apply(UndoBuffer undoBuffer)
		{
			var meshWrappers = this.Descendants().Where(o => o.OwnerID == this.ID).ToList();

			// remove all the meshWrappers (collapse the children)
			foreach (var meshWrapper in meshWrappers)
			{
				if (meshWrapper.Visible)
				{
					// clear the children
					meshWrapper.Children.Modify(list =>
					{
						list.Clear();
					});
					meshWrapper.OwnerID = null;
				}
				else
				{
					// remove it
					meshWrapper.Parent.Children.Remove(meshWrapper);
				}
			}

			base.Apply(undoBuffer);
		}

		public IEnumerable<(IObject3D original, IObject3D meshCopy)> WrappedObjects()
		{
			return this.Descendants()
				.Where((obj) => obj.OwnerID == this.ID)
				.Select((mw) => (mw.Children.First(), mw));
		}

		public override void Remove(UndoBuffer undoBuffer)
		{
			SuspendRebuild();

			// remove all the mesh wrappers that we own
			var meshWrappers = this.Descendants().Where(o => o.OwnerID == this.ID).ToList();
			foreach (var meshWrapper in meshWrappers)
			{
				meshWrapper.Remove(null);
			}
			foreach (var child in Children)
			{
				child.OutputType = PrintOutputTypes.Default;
			}

			// collapse our children into our parent
			base.Remove(null);
			ResumeRebuild();

			Invalidate(new InvalidateArgs(this, InvalidateType.Content));
		}

		public void ResetMeshWrapperMeshes(Object3DPropertyFlags flags, CancellationToken cancellationToken)
		{
			SuspendRebuild();

			this.DebugDepth("Reset MWM");

			// Remove evrything above the objects that have the meshes we are wrapping that are mesh wrappers
			var wrappers = this.Descendants().Where(o => o.OwnerID == this.ID).ToList();
			foreach (var wrapper in wrappers)
			{
				wrapper.SuspendRebuild();

				var remove = wrapper.Parent;
				while (remove is MeshWrapper)
				{
					var hold = remove;
					remove.Remove(null);
					remove = hold.Parent;
				}

				wrapper.ResumeRebuild();
			}

			// if there are not already, wrap all meshes with our id (some inner object may have changed it's meshes)
			AddMeshWrapperToAllChildren();

			this.Mesh = null;
			var participants = this.Descendants().Where(o => o.OwnerID == this.ID).ToList();
			foreach (var item in participants)
			{
				var firstChild = item.Children.First();
				item.SuspendRebuild();
				// set the mesh back to a copy of the child mesh
				item.Mesh = Mesh.Copy(firstChild.Mesh, cancellationToken);
				// and reset the properties
				item.CopyProperties(firstChild, flags & (~Object3DPropertyFlags.Matrix));
				item.ResumeRebuild();
			}

			ResumeRebuild();
		}

		public void WrapSelectedItemAndSelect(InteractiveScene scene)
		{
			SuspendRebuild();
			var selectedItems = scene.GetSelectedItems();

			if (selectedItems.Count > 0)
			{
				// cleare the selected item
				scene.SelectedItem = null;

				var clonedItemsToAdd = new List<IObject3D>(selectedItems.Select((i) => i.Clone()));

				Children.Modify((list) =>
				{
					list.Clear();

					foreach (var child in clonedItemsToAdd)
					{
						list.Add(child);
					}
				});

				AddMeshWrapperToAllChildren();

				scene.UndoBuffer.AddAndDo(
					new ReplaceCommand(
						new List<IObject3D>(selectedItems),
						new List<IObject3D> { this }));

				this.MakeNameNonColliding();

				// and select this
				scene.SelectedItem = this;
			}

			ResumeRebuild();

			Rebuild(null);
		}

		private void AddMeshWrapperToAllChildren()
		{
			// Wrap every first descendant that has a mesh
			foreach (var child in this.VisibleMeshes().ToList())
			{
				// have to check that NO child of the visible mesh has us as the parent id
				if (!child.DescendantsAndSelf().Where((c) => c.OwnerID == this.ID).Any())
				{
					// wrap the child
					child.Parent.Children.Modify((list) =>
					{
						list.Remove(child);
						list.Add(new MeshWrapper(child, this.ID));
					});
				}
			}
		}
	}
}