using System;
using System.Collections.Specialized;
using System.Xml;
using System.Text;
using System.Text.RegularExpressions;
namespace RSBuild
{
/// <summary>
/// Utility methods.
/// </summary>
public static class Util
{
/// <summary>
/// Gets the XML namespace manager.
/// </summary>
/// <param name="input">The input.</param>
/// <returns>The XML namespace manager</returns>
public static XmlNamespaceManager GetXmlNamespaceManager(XmlDocument input)
{
StringCollection namespaces = DetectXmlNamespace(input);
XmlNamespaceManager xnm = null;
if (namespaces != null && namespaces.Count > 0)
{
xnm = new XmlNamespaceManager(input.NameTable);
foreach(string ns in namespaces)
{
string[] arr = ns.Split('|');
xnm.AddNamespace(arr[0].Trim(), arr[1].Trim());
}
}
return xnm;
}
/// <summary>
/// Detects the XML namespace.
/// </summary>
/// <param name="doc">The doc.</param>
/// <returns></returns>
private static StringCollection DetectXmlNamespace(XmlDocument doc)
{
StringCollection detectedNamespaces = null;
if (doc != null)
{
XmlNode xmlNode = doc.DocumentElement;
detectedNamespaces = new StringCollection();
DiscoverNamespace(xmlNode, detectedNamespaces);
}
return detectedNamespaces;
}
/// <summary>
/// Discovers the namespace.
/// </summary>
/// <param name="xmlNode">The XML node.</param>
/// <param name="discovered">The discovered.</param>
private static void DiscoverNamespace(XmlNode xmlNode, StringCollection discovered)
{
string nsPrefix;
string nsUri;
if (xmlNode.NodeType == XmlNodeType.Element)
{
if (xmlNode.Attributes.Count > 0)
{
foreach(XmlAttribute attr in xmlNode.Attributes)
{
if (attr.Name.StartsWith("xmlns"))
{
string nsDef = attr.Name.Split('=')[0];
if (string.Compare(nsDef, "xmlns", true) != 0)
{
nsPrefix = nsDef.Split(':')[1];
}
else
{
nsPrefix = "def";
}
nsUri = attr.Value;
discovered.Add(string.Format("{0}|{1}", nsPrefix, nsUri));
}
}
}
if (xmlNode.HasChildNodes)
{
foreach(XmlNode node in xmlNode.ChildNodes)
{
DiscoverNamespace(node, discovered);
}
}
}
}
}
}
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