public static string RowCommonPart(string leftPath, string rightPath)
{
string root = CommonPart(leftPath, rightPath);
XPathInfo left = new XPathInfo(Relative(leftPath, root));
XPathInfo right = new XPathInfo(Relative(rightPath, root));
if (left.Parts.Length > 0 && right.Parts.Length > 0)
{
string leftPart = PathWithoutBracets(left.Parts[0]);
if (!string.IsNullOrEmpty(leftPart) && leftPart == PathWithoutBracets(right.Parts[0]))
return root + "/" + leftPart;
}
return root;
}
public static XPathInfo Parse(string xpath)
{
lock (cache)
{
if (!cache.ContainsKey(xpath))
cache[xpath] = new XPathInfo(xpath);
return cache[xpath];
}
}
public static string Relative(string nodePath, string rootPath)
{
XPathInfo node = new XPathInfo(nodePath);
XPathInfo root = new XPathInfo(rootPath);
if (node.Parts.Length >= root.Parts.Length)
{
int i;
for (i = 0; i < root.Parts.Length - 1; i++)
if (node.Parts[i] != root.Parts[i])
return null;
if (node.Parts[i].StartsWith(root.Parts[i]))
i++;
else
return null;
string result = string.Join("/", node.Parts, i, node.Parts.Length - i);
if (!string.IsNullOrEmpty(result))
return result;
else
return ".";
}
else
return null;
}
public static string CommonPart(string leftPath, string rightPath)
{
XPathInfo left = new XPathInfo(leftPath);
XPathInfo right = new XPathInfo(rightPath);
//StringBuilder result = new StringBuilder();
int i;
List<string> result = new List<string>();
for (i = 0; i < Math.Min(left.Parts.Length, right.Parts.Length); i++)
{
if (left.Parts[i] == right.Parts[i])
result.Add(left.Parts[i]);
else
{
string lShort = PathWithoutBracets(left.Parts[i]);
string rShort = PathWithoutBracets(right.Parts[i]);
//if (lShort == rShort)
// result.Add(lShort);
if (lShort == right.Parts[i])
result.Add(lShort);
else if (rShort == left.Parts[i])
result.Add(rShort);
break;
}
}
if (i > 0)
{
return string.Join("/", result.ToArray());
}
else
return ".";
}
