Mono.TextEditor.TextEditorData.DeleteSelection C# (CSharp) Method

		internal void DeleteSelection (Selection selection)
		{
			if (selection.IsEmpty)
				throw new ArgumentNullException ("selection was empty.");
			switch (selection.SelectionMode) {
			case SelectionMode.Normal:
				var segment = selection.GetSelectionRange (this);
				int len = System.Math.Min (segment.Length, Document.TextLength - segment.Offset);
				var loc = selection.Anchor < selection.Lead ? selection.Anchor : selection.Lead;
				caret.Location = loc;
				EnsureCaretIsNotVirtual ();
				if (len > 0)
					Remove (segment.Offset, len);
				caret.Location = loc;
				break;
			case SelectionMode.Block:
				DocumentLocation visStart = LogicalToVisualLocation (selection.Anchor);
				DocumentLocation visEnd = LogicalToVisualLocation (selection.Lead);
				int startCol = System.Math.Min (visStart.Column, visEnd.Column);
				int endCol = System.Math.Max (visStart.Column, visEnd.Column);
				bool preserve = Caret.PreserveSelection;
				Caret.PreserveSelection = true;
				for (int lineNr = selection.MinLine; lineNr <= selection.MaxLine; lineNr++) {
					DocumentLine curLine = Document.GetLine (lineNr);
					int col1 = curLine.GetLogicalColumn (this, startCol) - 1;
					int col2 = System.Math.Min (curLine.GetLogicalColumn (this, endCol) - 1, curLine.Length);
					if (col1 >= col2)
						continue;
					Remove (curLine.Offset + col1, col2 - col1);
					
					if (Caret.Line == lineNr && Caret.Column >= col1)
						Caret.Column = col1 + 1;
				}
				int column = System.Math.Min (selection.Anchor.Column, selection.Lead.Column);
				MainSelection = selection.WithRange (
					new DocumentLocation (selection.Anchor.Line, column),
					new DocumentLocation (selection.Lead.Line, column)
				);
				Caret.PreserveSelection = preserve;
				break;
			}
			FixVirtualIndentation ();
		}