/// <summary>
/// Get an XPath for an XML node in the local XML tree.
/// </summary>
/// <param name="mnsmgr">A CustomXMLPrefixMappings containing the namespace mappings in the corresponding CustomXMLPart.</param>
/// <param name="xn">The XmlNode to convert.</param>
/// <param name="removeTextNode">True to get the XPath for the parent XML node, False otherwise.</param>
/// <param name="xnsmgr">The XmlNamespaceManager for the local XML tree.</param>
/// <returns>The corresponding XPath.</returns>
internal static string XpathFromXn(Office.CustomXMLPrefixMappings mnsmgr, XmlNode xn, bool removeTextNode, XmlNamespaceManager xnsmgr)
{
string strThis = null;
string strThisName = null;
string ns = "";
XmlNode xnParent = xn.ParentNode;
bool fCheckParent = true;
switch (xn.NodeType)
{
case XmlNodeType.Element:
strThisName = xn.LocalName;
if (!String.IsNullOrEmpty(xn.NamespaceURI) && xnsmgr != null && mnsmgr != null && !string.IsNullOrEmpty(mnsmgr.LookupPrefix(xn.NamespaceURI)))
{
xnsmgr.AddNamespace(mnsmgr.LookupPrefix(xn.NamespaceURI), xn.NamespaceURI);
ns = mnsmgr.LookupPrefix(xn.NamespaceURI) + ":";
}
strThis = "/" + ns + strThisName + XpathPosFromXn(xn);
break;
case XmlNodeType.Attribute:
strThisName = xn.LocalName;
if (!String.IsNullOrEmpty(xn.NamespaceURI) && xnsmgr != null && mnsmgr != null)
{
xnsmgr.AddNamespace(mnsmgr.LookupPrefix(xn.NamespaceURI), xn.NamespaceURI);
ns = mnsmgr.LookupPrefix(xn.NamespaceURI) + ":";
}
strThis = "/@" + ns + strThisName;
xnParent = xn.SelectSingleNode("..", null);
break;
case XmlNodeType.ProcessingInstruction:
{
strThis = "/processing-instruction(";
strThis = strThis + ")" + XpathPosFromXn(xn);
break;
}
case XmlNodeType.Text:
//if the parent is an attribute (for this text node), we need to get it's parent's xpath instead
if (xn.ParentNode.NodeType != XmlNodeType.Attribute && !removeTextNode)
{
strThis = "/text()" + XpathPosFromXn(xn);
}
else
{
strThis = "";
}
break;
case XmlNodeType.Comment:
strThis = "/comment()" + XpathPosFromXn(xn);
break;
case XmlNodeType.Document:
strThis = "";
fCheckParent = false;
break;
case XmlNodeType.EntityReference:
case XmlNodeType.CDATA:
strThis = "/text()" + XpathPosFromXn(xn);
break;
case XmlNodeType.Whitespace:
case XmlNodeType.SignificantWhitespace:
break;
}
return(strThis.Insert(0, fCheckParent ? XpathFromXn(mnsmgr, xnParent, false, xnsmgr) : ""));
}
/// <summary>
/// Get an XPath for a CustomXMLNode.
/// </summary>
/// <param name="xn">The CustomXMLNode to convert.</param>
/// <param name="xnsmgr">The XmlNamespaceManager for the local XML tree.</param>
/// <param name="mxnNew">A new CustomXMLNode that's not in the local tree, and therefore should be ignored when trying to find the XPath.</param>
/// <returns>The corresponding XPath.</returns>
private static string XpathFromMxn(Office.CustomXMLNode xn, XmlNamespaceManager xnsmgr, Office.CustomXMLNode mxnNew)
{
try
{
Debug.Assert(xn != null, "cannot create an xpath from a null node");
string strThis = null;
string strThisName = null;
string ns = "";
bool fCheckParent = true;
Office.CustomXMLNode xnParent = xn.ParentNode;
Office.CustomXMLPrefixMappings mnsmgr = xn.OwnerPart.NamespaceManager;
switch (xn.NodeType)
{
case Office.MsoCustomXMLNodeType.msoCustomXMLNodeElement:
strThisName = xn.BaseName;
if (!string.IsNullOrEmpty(xn.NamespaceURI))
{
ns = mnsmgr.LookupPrefix(xn.NamespaceURI) + ":";
xnsmgr.AddNamespace(mnsmgr.LookupPrefix(xn.NamespaceURI), xn.NamespaceURI);
}
strThis = "/" + ns + strThisName + XpathPosFromMxn(xn, mxnNew);
break;
case Office.MsoCustomXMLNodeType.msoCustomXMLNodeAttribute:
strThisName = xn.BaseName;
if (!string.IsNullOrEmpty(xn.NamespaceURI))
{
ns = mnsmgr.LookupPrefix(xn.NamespaceURI) + ":";
xnsmgr.AddNamespace(mnsmgr.LookupPrefix(xn.NamespaceURI), xn.NamespaceURI);
}
strThis = "/@" + ns + strThisName;
xnParent = xn.SelectSingleNode("..");
break;
case Office.MsoCustomXMLNodeType.msoCustomXMLNodeProcessingInstruction:
{
strThis = "/processing-instruction(";
strThis = strThis + ")" + XpathPosFromMxn(xn, mxnNew);
break;
}
case Office.MsoCustomXMLNodeType.msoCustomXMLNodeText:
strThis = "/text()" + XpathPosFromMxn(xn, mxnNew);
break;
case Office.MsoCustomXMLNodeType.msoCustomXMLNodeComment:
strThis = "/comment()" + XpathPosFromMxn(xn, mxnNew);
break;
case Office.MsoCustomXMLNodeType.msoCustomXMLNodeDocument:
strThis = "";
fCheckParent = false;
break;
case Office.MsoCustomXMLNodeType.msoCustomXMLNodeCData:
strThis = "/text()" + XpathPosFromMxn(xn, mxnNew);
break;
}
return(strThis.Insert(0, fCheckParent ? XpathFromMxn(xnParent, xnsmgr, mxnNew) : ""));
}
catch (COMException ex)
{
Debug.Fail(ex.Source, ex.Message);
}
return(string.Empty);
}