/*******************************************************************************
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* You may amend and distribute as you like, but don't remove this header!
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*
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* EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
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* See http://www.codeplex.com/EPPlus for details.
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*
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* Copyright (C) 2011 Jan Källman
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
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* If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
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*
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* All code and executables are provided "as is" with no warranty either express or implied.
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* The author accepts no liability for any damage or loss of business that this product may cause.
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*
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* Code change notes:
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*
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* Author Change Date
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* ******************************************************************************
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* Mats Alm Added 2011-01-08
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* Jan Källman License changed GPL-->LGPL 2011-12-27
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*******************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Xml;
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using HH.WMS.Utils.EPPlus.Utils;
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using HH.WMS.Utils.EPPlus.DataValidation.Formulas.Contracts;
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namespace HH.WMS.Utils.EPPlus.DataValidation.Formulas
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{
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/// <summary>
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/// Enumeration representing the state of an <see cref="ExcelDataValidationFormulaValue{T}"/>
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/// </summary>
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internal enum FormulaState
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{
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/// <summary>
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/// Value is set
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/// </summary>
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Value,
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/// <summary>
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/// Formula is set
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/// </summary>
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Formula
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}
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/// <summary>
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/// Base class for a formula
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/// </summary>
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internal abstract class ExcelDataValidationFormula : XmlHelper
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{
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="namespaceManager">Namespacemanger of the worksheet</param>
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/// <param name="topNode">validation top node</param>
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/// <param name="formulaPath">xml path of the current formula</param>
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public ExcelDataValidationFormula(XmlNamespaceManager namespaceManager, XmlNode topNode, string formulaPath)
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: base(namespaceManager, topNode)
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{
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Require.Argument(formulaPath).IsNotNullOrEmpty("formulaPath");
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FormulaPath = formulaPath;
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}
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private string _formula;
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protected string FormulaPath
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{
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get;
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private set;
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}
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/// <summary>
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/// State of the validationformula, i.e. tells if value or formula is set
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/// </summary>
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protected FormulaState State
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{
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get;
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set;
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}
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/// <summary>
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/// A formula which output must match the current validation type
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/// </summary>
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public string ExcelFormula
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{
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get
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{
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return _formula;
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}
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set
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{
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if (!string.IsNullOrEmpty(value))
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{
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ResetValue();
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State = FormulaState.Formula;
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}
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if (value != null && value.Length > 255)
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{
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throw new InvalidOperationException("The length of a DataValidation formula cannot exceed 255 characters");
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}
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//var val = SqRefUtility.ToSqRefAddress(value);
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_formula = value;
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SetXmlNodeString(FormulaPath, value);
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}
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}
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internal abstract void ResetValue();
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/// <summary>
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/// This value will be stored in the xml. Can be overridden by subclasses
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/// </summary>
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internal virtual string GetXmlValue()
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{
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if (State == FormulaState.Formula)
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{
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return ExcelFormula;
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}
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return GetValueAsString();
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}
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/// <summary>
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/// Returns the value as a string. Must be implemented by subclasses
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/// </summary>
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/// <returns></returns>
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protected abstract string GetValueAsString();
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}
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}
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