EPPlus/Style/XmlAccess/StyleXmlHelper.cs

/*******************************************************************************
 * You may amend and distribute as you like, but don't remove this header!
 *
 * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
 * See http://www.codeplex.com/EPPlus for details.
 *
 * 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
 * ******************************************************************************
 * Jan Källman		                Initial Release		        2009-10-01
 * Jan Källman		License changed GPL-->LGPL 2011-12-16
 *******************************************************************************/

using System.Xml;

namespace OfficeOpenXml.Style.XmlAccess;

/// <summary>
/// Xml helper class for cell style classes
/// </summary>
public abstract class StyleXmlHelper : XmlHelper {
  internal StyleXmlHelper(XmlNamespaceManager nameSpaceManager)
      : base(nameSpaceManager) {}

  internal StyleXmlHelper(XmlNamespaceManager nameSpaceManager, XmlNode topNode)
      : base(nameSpaceManager, topNode) {}

  internal abstract XmlNode CreateXmlNode(XmlNode top);

  internal abstract string Id { get; }

  internal long useCnt = 0;
  internal int newID = int.MinValue;

  protected bool GetBoolValue(XmlNode topNode, string path) {
    var node = topNode.SelectSingleNode(path, NameSpaceManager);
    if (node is XmlAttribute) {
      return node.Value != "0";
    }
    if (node != null
        && ((node.Attributes["val"] != null && node.Attributes["val"].Value != "0")
                || node.Attributes["val"] == null)) {
      return true;
    }
    return false;
  }
}