internal static XmlDiffPathNodeList SelectNodes(
XmlDiffViewParentNode rootNode,
XmlDiffViewParentNode currentParentNode,
string xmlDiffPathExpr)
{
switch (xmlDiffPathExpr[0])
{
case '*':
if (xmlDiffPathExpr.Length == 1)
{
return(XmlDiffPath.SelectAllChildren(currentParentNode));
}
XmlDiffPath.OnInvalidExpression(xmlDiffPathExpr);
return((XmlDiffPathNodeList)null);
case '/':
return(XmlDiffPath.SelectAbsoluteNodes(rootNode, xmlDiffPathExpr));
case '@':
if (xmlDiffPathExpr.Length < 2)
{
XmlDiffPath.OnInvalidExpression(xmlDiffPathExpr);
}
return(xmlDiffPathExpr[1] == '*' ? XmlDiffPath.SelectAllAttributes((XmlDiffViewElement)currentParentNode) : XmlDiffPath.SelectAttributes((XmlDiffViewElement)currentParentNode, xmlDiffPathExpr));
default:
return(XmlDiffPath.SelectChildNodes(currentParentNode, xmlDiffPathExpr, 0));
}
}
private static XmlDiffPathNodeList SelectAbsoluteNodes(
XmlDiffViewParentNode rootNode,
string path)
{
Debug.Assert(path[0] == '/');
var pos = 1;
var node = (XmlDiffViewNode)rootNode;
int startPos;
while (true)
{
startPos = pos;
var num = XmlDiffPath.ReadPosition(path, ref pos);
if (pos == path.Length || path[pos] == '/')
{
if (node.FirstChildNode == null)
{
XmlDiffPath.OnNoMatchingNode(path);
}
var diffViewParentNode = (XmlDiffViewParentNode)node;
if (num <= 0 || num > diffViewParentNode._sourceChildNodesCount)
{
XmlDiffPath.OnNoMatchingNode(path);
}
node = diffViewParentNode.GetSourceChildNode(num - 1);
if (pos != path.Length)
{
++pos;
}
else
{
break;
}
}
else if (path[pos] != '-' && path[pos] != '|')
{
XmlDiffPath.OnInvalidExpression(path);
}
else
{
goto label_10;
}
}
var diffPathNodeList = (XmlDiffPathNodeList) new XmlDiffPathSingleNodeList();
diffPathNodeList.AddNode(node);
return(diffPathNodeList);
label_10:
if (node.FirstChildNode == null)
{
XmlDiffPath.OnNoMatchingNode(path);
}
return(XmlDiffPath.SelectChildNodes((XmlDiffViewParentNode)node, path, startPos));
}