[Editor] Add commands to copy/paste from asset explorer

Author: Kryptos-FR

sources/editor/Stride.Core.Assets.Editor/Quantum/FixAssetReferenceOperation.cs

@@ -0,0 +1,58 @@
+// Copyright (c) .NET Foundation and Contributors (https://dotnetfoundation.org/ & https://stride3d.net) and Silicon Studio Corp. (https://www.siliconstudio.co.jp)
+// Distributed under the MIT license. See the LICENSE.md file in the project root for more information.
+
+using Stride.Core.Assets.Analysis;
+using Stride.Core.Assets.Presentation.ViewModels;
+using Stride.Core.Presentation.Dirtiables;
+
+namespace Stride.Core.Assets.Editor.Quantum;
+
+internal sealed class FixAssetReferenceOperation : DirtyingOperation
+{
+    private readonly bool fixOnUndo;
+    private readonly bool fixOnRedo;
+    private IReadOnlyCollection<AssetViewModel> assets;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="FixAssetReferenceOperation"/> class.
+    /// </summary>
+    /// <param name="assets">The list of assets to fix.</param>
+    /// <param name="fixOnUndo">Indicates whether this action item should fix the reference during an Undo operation.</param>
+    /// <param name="fixOnRedo">Indicates whether this action item should fix the reference during a Redo operation.</param>
+    public FixAssetReferenceOperation(IReadOnlyCollection<AssetViewModel> assets, bool fixOnUndo, bool fixOnRedo)
+        : base(assets)
+    {
+        this.assets = assets;
+        this.fixOnUndo = fixOnUndo;
+        this.fixOnRedo = fixOnRedo;
+    }
+
+    public void FixAssetReferences()
+    {
+        AssetAnalysis.FixAssetReferences(assets.Select(x => x.AssetItem));
+    }
+
+    /// <inheritdoc/>
+    protected override void FreezeContent()
+    {
+        assets = null;
+    }
+
+    /// <inheritdoc/>
+    protected override void Undo()
+    {
+        if (!fixOnUndo)
+            return;
+
+        FixAssetReferences();
+    }
+
+    /// <inheritdoc/>
+    protected override void Redo()
+    {
+        if (!fixOnRedo)
+            return;
+
+        FixAssetReferences();
+    }
+}