Alsing.Windows.Forms.SyntaxBox.EditViewControl.InsertEnter C# (CSharp) Method

        private void InsertEnter()
        {
            Caret.CropPosition();
            if (Selection.IsValid)
            {
                Selection.DeleteSelection();
                InsertEnter();
            }
            else
            {
                switch (Indent)
                {
                    case IndentStyle.None:
                        {
                            Document.InsertText("\n", Caret.Position.X, Caret.Position.Y);
                            //depends on what sort of indention we are using....
                            Caret.CurrentRow.Parse();
                            Caret.MoveDown(false);
                            Caret.CurrentRow.Parse(false);
                            Caret.CurrentRow.Parse(true);

                            Caret.Position.X = 0;
                            Caret.SetPos(Caret.Position);
                            break;
                        }
                    case IndentStyle.LastRow:
                        {
                            Row xtr = Caret.CurrentRow;
                            string indent = xtr.GetLeadingWhitespace();
                            int Max = Math.Min(indent.Length, Caret.Position.X);
                            string split = "\n" + indent.Substring(0, Max);
                            Document.InsertText(split, Caret.Position.X, Caret.Position.Y);
                            Document.ResetVisibleRows();
                            Caret.CurrentRow.Parse(false);
                            Caret.CurrentRow.Parse(true);
                            Caret.MoveDown(false);
                            Caret.CurrentRow.Parse(false);
                            Caret.CurrentRow.Parse(true);

                            Caret.Position.X = indent.Length;
                            Caret.SetPos(Caret.Position);
                            xtr.Parse(false);
                            xtr.Parse(true);
                            xtr.NextRow.Parse(false);
                            xtr.NextRow.Parse(true);

                            break;
                        }
                    case IndentStyle.Scope:
                        {
                            Row xtr = Caret.CurrentRow;
                            xtr.Parse(true);
                            if (xtr.ShouldOutdent)
                            {
                                OutdentEndRow();
                            }

                            Document.InsertText("\n", Caret.Position.X, Caret.Position.Y);
                            //depends on what sort of indention we are using....
                            Caret.CurrentRow.Parse();
                            Caret.MoveDown(false);
                            Caret.CurrentRow.Parse(false);

                            var indent = new String('\t', Caret.CurrentRow.Depth);
                            Document.InsertText(indent, 0, Caret.Position.Y);

                            Caret.CurrentRow.Parse(false);
                            Caret.CurrentRow.Parse(true);

                            Caret.Position.X = indent.Length;
                            Caret.SetPos(Caret.Position);
                            Caret.CropPosition();
                            Selection.ClearSelection();

                            xtr.Parse(false);
                            xtr.Parse(true);
                            xtr.NextRow.Parse(false);
                            xtr.NextRow.Parse(true);

                            break;
                        }
                    case IndentStyle.Smart:
                        {
                            Row xtr = Caret.CurrentRow;
                            if (xtr.ShouldOutdent)
                            {
                                OutdentEndRow();
                            }
                            Document.InsertText("\n", Caret.Position.X, Caret.Position.Y);
                            Caret.MoveDown(false);
                            Caret.CurrentRow.Parse(false);
                            Caret.CurrentRow.Parse(true);
                            Caret.CurrentRow.startSpan.StartRow.Parse(false);
                            Caret.CurrentRow.startSpan.StartRow.Parse(true);

                            string prev = "\t" +
                                          Caret.CurrentRow.startSpan.StartRow.GetVirtualLeadingWhitespace();

                            string indent = Caret.CurrentRow.PrevRow.GetLeadingWhitespace();
                            if (indent.Length < prev.Length)
                                indent = prev;

                            string ts = "\t" + new String(' ', TabSize);
                            while (indent.IndexOf(ts) >= 0)
                            {
                                indent = indent.Replace(ts, "\t\t");
                            }

                            Document.InsertText(indent, 0, Caret.Position.Y);

                            Caret.CurrentRow.Parse(false);
                            Caret.CurrentRow.Parse(true);

                            Caret.Position.X = indent.Length;
                            Caret.SetPos(Caret.Position);

                            Caret.CropPosition();
                            Selection.ClearSelection();
                            xtr.Parse(false);
                            xtr.Parse(true);
                            xtr.NextRow.Parse(false);
                            xtr.NextRow.Parse(true);
                            break;
                        }
                }
                ScrollIntoView();
            }
        }