internal static XmlNodeList SelectNodes(
XmlNode rootNode,
XmlNode currentParentNode,
string pathDescriptor)
{
switch (pathDescriptor[0])
{
case '*':
if (pathDescriptor.Length == 1)
{
return(PathDescriptorParser.SelectAllChildren(currentParentNode));
}
PathDescriptorParser.OnInvalidExpression(pathDescriptor);
return((XmlNodeList)null);
case '/':
return(PathDescriptorParser.SelectAbsoluteNodes(rootNode, pathDescriptor));
case '@':
if (pathDescriptor.Length < 2)
{
PathDescriptorParser.OnInvalidExpression(pathDescriptor);
}
return(pathDescriptor[1] == '*' ? PathDescriptorParser.SelectAllAttributes(currentParentNode) : PathDescriptorParser.SelectAttributes(currentParentNode, pathDescriptor));
default:
return(PathDescriptorParser.SelectChildNodes(currentParentNode, pathDescriptor, 0));
}
}
private static XmlNodeList SelectAbsoluteNodes(XmlNode rootNode, string path)
{
var pos = 1;
var xmlNode = rootNode;
int startPos;
while (true)
{
startPos = pos;
var childNodes = xmlNode.ChildNodes;
var num = PathDescriptorParser.ReadPosition(path, ref pos);
if (pos == path.Length || path[pos] == '/')
{
if (childNodes.Count == 0 || num < 0 || num > childNodes.Count)
{
PathDescriptorParser.OnNoMatchingNode(path);
}
xmlNode = childNodes.Item(num - 1);
if (pos != path.Length)
{
++pos;
}
else
{
break;
}
}
else if (path[pos] != '-' && path[pos] != '|')
{
PathDescriptorParser.OnInvalidExpression(path);
}
else
{
goto label_8;
}
}
var xmlPatchNodeList = (XmlPatchNodeList) new SingleNodeList();
xmlPatchNodeList.AddNode(xmlNode);
return((XmlNodeList)xmlPatchNodeList);
label_8:
return(PathDescriptorParser.SelectChildNodes(xmlNode, path, startPos));
}
private static XmlNodeList SelectAttributes(XmlNode parentNode, string path)
{
var pos = 1;
var attributes = parentNode.Attributes;
var xmlPatchNodeList = (XmlPatchNodeList)null;
while (true)
{
var name = PathDescriptorParser.ReadAttrName(path, ref pos);
if (xmlPatchNodeList == null)
{
xmlPatchNodeList = pos != path.Length ? (XmlPatchNodeList) new MultiNodeList() : (XmlPatchNodeList) new SingleNodeList();
}
var namedItem = attributes.GetNamedItem(name);
if (namedItem == null)
{
PathDescriptorParser.OnNoMatchingNode(path);
}
xmlPatchNodeList.AddNode(namedItem);
if (pos != path.Length)
{
if (path[pos] == '|')
{
++pos;
if (path[pos] != '@')
{
PathDescriptorParser.OnInvalidExpression(path);
}
++pos;
}
else
{
PathDescriptorParser.OnInvalidExpression(path);
}
}
else
{
break;
}
}
return((XmlNodeList)xmlPatchNodeList);
}
private static XmlNodeList SelectChildNodes(
XmlNode parentNode,
string path,
int startPos)
{
var pos = startPos;
var childNodes = parentNode.ChildNodes;
var num1 = PathDescriptorParser.ReadPosition(path, ref pos);
var xmlPatchNodeList = pos != path.Length ? (XmlPatchNodeList) new MultiNodeList() : (XmlPatchNodeList) new SingleNodeList();
while (true)
{
if (num1 <= 0 || num1 > childNodes.Count)
{
PathDescriptorParser.OnNoMatchingNode(path);
}
var node = childNodes.Item(num1 - 1);
xmlPatchNodeList.AddNode(node);
if (pos != path.Length)
{
if (path[pos] == '|')
{
++pos;
}
else if (path[pos] == '-')
{
++pos;
var num2 = PathDescriptorParser.ReadPosition(path, ref pos);
if (num2 <= 0 || num2 > childNodes.Count)
{
PathDescriptorParser.OnNoMatchingNode(path);
}
while (num1 < num2)
{
++num1;
node = node.NextSibling;
xmlPatchNodeList.AddNode(node);
}
if (pos != path.Length)
{
if (path[pos] == '|')
{
++pos;
}
else
{
PathDescriptorParser.OnInvalidExpression(path);
}
}
else
{
break;
}
}
num1 = PathDescriptorParser.ReadPosition(path, ref pos);
}
else
{
break;
}
}
return((XmlNodeList)xmlPatchNodeList);
}
