/* Copyright (C) 2011 Jan Källman * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU Lesser General Public License for more details. * * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html * * All code and executables are provided "as is" with no warranty either express or implied. * The author accepts no liability for any damage or loss of business that this product may cause. * * Code change notes: * * Author Change Date ******************************************************************************* * Mats Alm Added 2013-12-03 *******************************************************************************/ using System; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Text; using OfficeOpenXml.FormulaParsing.ExpressionGraph; namespace OfficeOpenXml.FormulaParsing.Excel.Functions.Text { public class Proper : ExcelFunction { public override CompileResult Execute(IEnumerable arguments, ParsingContext context) { ValidateArguments(arguments, 1); var text = ArgToString(arguments, 0).ToLower(CultureInfo.InvariantCulture); var sb = new StringBuilder(); var previousChar = '.'; foreach (var ch in text) { if (!char.IsLetter(previousChar)) { sb.Append(ch.ToString(CultureInfo.InvariantCulture).ToUpperInvariant()); } else { sb.Append(ch); } previousChar = ch; } return CreateResult(sb.ToString(), DataType.String); } } }