Dynamo.Controls.DynamoView.OnRequestPaste C# (CSharp) Méthode

        private void OnRequestPaste()
        {
            var clipBoard = dynamoViewModel.Model.ClipBoard;
            var locatableModels = clipBoard.Where(item => item is NoteModel || item is NodeModel);

            var modelBounds = locatableModels.Select(lm =>
                new Rect {X = lm.X, Y = lm.Y, Height = lm.Height, Width = lm.Width});

            // Find workspace view.
            var workspace = this.ChildOfType<WorkspaceView>();
            var workspaceBounds = workspace.GetVisibleBounds();

            // is at least one note/node located out of visible workspace part
            var outOfView = modelBounds.Any(m => !workspaceBounds.Contains(m));

            // If copied nodes are out of view, we paste their copies under mouse cursor or at the center of workspace.
            if (outOfView)
            {
                // If mouse is over workspace, paste copies under mouse cursor.
                if (workspace.IsMouseOver)
                {
                    dynamoViewModel.Model.Paste(Mouse.GetPosition(workspace.WorkspaceElements).AsDynamoType(), false);
                }
                else // If mouse is out of workspace view, then paste copies at the center.
                {
                    PasteNodeAtTheCenter(workspace);
                }

                return;
            }

            // All nodes are inside of workspace and visible for user.
            // Order them by CenterX and CenterY.
            var orderedItems = locatableModels.OrderBy(item => item.CenterX + item.CenterY);

            // Search for the rightmost item. It's item with the biggest X, Y coordinates of center.
            var rightMostItem = orderedItems.Last();
            // Search for the leftmost item. It's item with the smallest X, Y coordinates of center.
            var leftMostItem = orderedItems.First();

            // Compute shift so that left most item will appear at right most item place with offset.
            var shiftX = rightMostItem.X + rightMostItem.Width - leftMostItem.X;
            var shiftY = rightMostItem.Y - leftMostItem.Y;

            // Find new node bounds.
            var newNodeBounds = modelBounds
                .Select(node => new Rect(node.X + shiftX + workspace.ViewModel.Model.CurrentPasteOffset,
                                         node.Y + shiftY + workspace.ViewModel.Model.CurrentPasteOffset,
                                         node.Width, node.Height));

            outOfView = newNodeBounds.Any(node => !workspaceBounds.Contains(node));

            // If new node bounds appeare out of workspace view, we should paste them at the center.
            if (outOfView)
            {
                PasteNodeAtTheCenter(workspace);
                return;
            }

            var x = shiftX + locatableModels.Min(m => m.X);
            var y = shiftY + locatableModels.Min(m => m.Y);

            // All copied nodes are inside of workspace.
            // Paste them with little offset.           
            dynamoViewModel.Model.Paste(new Point2D(x, y));
        }