private string PseudoClassesToXPath(Match match, XPathNavigator nav)
{
int specificityA = 0;
int specificityB = 1;
int specificityC = 0;
string r = String.Empty;
Group g = match.Groups["pseudoclass"];
foreach(Capture c in g.Captures)
{
Regex reLang = new Regex(@"^lang\(([A-Za-z\-]+)\)$");
Regex reContains = new Regex("^contains\\((\"|\')?(?<stringvalue>.*?)(\"|\')?\\)$");
string s = @"^(?<type>(nth-child)|(nth-last-child)|(nth-of-type)|(nth-last-of-type))\(\s*";
s += @"(?<exp>(odd)|(even)|(((?<a>[\+-]?\d*)n)?(?<b>[\+-]?\d+)?))";
s += @"\s*\)$";
Regex reNth = new Regex(s);
string p = c.Value.Substring(1);
if(p == "root")
{
r += "[not(parent::*)]";
}
else if(p.StartsWith("not"))
{
string expr = p.Substring(4, p.Length-5);
XPathSelector sel = new XPathSelector(expr, NsTable);
string xpath = sel.XPath;
if(xpath != null && xpath.Length>3)
{
// remove *[ and ending ]
xpath = xpath.Substring(2, xpath.Length-3);
r += "[not(" + xpath + ")]";
int specificity = sel.Specificity;
// specificity = 123
specificityA = (int)Math.Floor((double) specificity / 100);
specificity -= specificityA*100;
// specificity = 23
specificityB = (int)Math.Floor((double) (specificity) / 10);
specificity -= specificityB * 10;
// specificity = 3
specificityC = specificity;
}
}
else if(p == "first-child")
{
r += "[count(preceding-sibling::*)=0]";
}
else if(p == "last-child")
{
r += "[count(following-sibling::*)=0]";
}
else if(p == "only-child")
{
r += "[count(../*)=1]";
}
else if(p == "only-of-type")
{
r += "[false]";
}
else if(p == "empty")
{
r += "[not(child::*) and not(text())]";
}
else if(p == "target")
{
r += "[false]";
}
else if(p == "first-of-type")
{
r += "[false]";
//r += "[.=(../*[local-name='roffe'][position()=1])]";
}
else if(reLang.IsMatch(p))
{
r += "[lang('" + reLang.Match(p).Groups[1].Value + "')]";
}
else if(reContains.IsMatch(p))
{
r += "[contains(string(.),'" + reContains.Match(p).Groups["stringvalue"].Value + "')]";
}
else if(reNth.IsMatch(p))
{
Match m = reNth.Match(p);
string type = m.Groups["type"].Value;
string exp = m.Groups["exp"].Value;
int a = 0;
int b = 0;
if(exp == "odd")
{
a = 2;
b = 1;
}
else if(exp == "even")
{
a = 2;
b = 0;
}
else
{
string v = m.Groups["a"].Value;
if(v.Length == 0) a = 1;
else if(v.Equals("-")) a = -1;
else a = Int32.Parse(v);
if(m.Groups["b"].Success) b = Int32.Parse(m.Groups["b"].Value);
}
if(type.Equals("nth-child") || type.Equals("nth-last-child"))
{
string axis;
if(type.Equals("nth-child")) axis = "preceding-sibling";
else axis = "following-sibling";
if(a == 0)
{
r += "[count(" + axis + "::*)+1=" + b + "]";
}
else
{
r += "[((count(" + axis + "::*)+1-" + b + ") mod " + a + "=0)and((count(" + axis + "::*)+1-" + b + ") div " + a + ">=0)]";
}
}
}
AddSpecificity(specificityA, specificityB, specificityC);
}
return r;
}
private string PseudoClassesToXPath(Match match, XPathNavigator nav)
{
int specificityA = 0;
int specificityB = 1;
int specificityC = 0;
string r = String.Empty;
Group g = match.Groups["pseudoclass"];
foreach (Capture c in g.Captures)
{
Regex reLang = new Regex(@"^lang\(([A-Za-z\-]+)\)$");
Regex reContains = new Regex("^contains\\((\"|\')?(?<stringvalue>.*?)(\"|\')?\\)$");
string s = @"^(?<type>(nth-child)|(nth-last-child)|(nth-of-type)|(nth-last-of-type))\(\s*";
s += @"(?<exp>(odd)|(even)|(((?<a>[\+-]?\d*)n)?(?<b>[\+-]?\d+)?))";
s += @"\s*\)$";
Regex reNth = new Regex(s);
string p = c.Value.Substring(1);
if (p == "root")
{
r += "[not(parent::*)]";
}
else if (p.StartsWith("not"))
{
string expr = p.Substring(4, p.Length - 5);
XPathSelector sel = new XPathSelector(expr, NsTable);
string xpath = sel.XPath;
if (xpath != null && xpath.Length > 3)
{
// remove *[ and ending ]
xpath = xpath.Substring(2, xpath.Length - 3);
r += "[not(" + xpath + ")]";
int specificity = sel.Specificity;
// specificity = 123
specificityA = (int)Math.Floor((double)specificity / 100);
specificity -= specificityA * 100;
// specificity = 23
specificityB = (int)Math.Floor((double)(specificity) / 10);
specificity -= specificityB * 10;
// specificity = 3
specificityC = specificity;
}
}
else if (p == "first-child")
{
r += "[count(preceding-sibling::*)=0]";
}
else if (p == "last-child")
{
r += "[count(following-sibling::*)=0]";
}
else if (p == "only-child")
{
r += "[count(../*)=1]";
}
else if (p == "only-of-type")
{
r += "[false]";
}
else if (p == "empty")
{
r += "[not(child::*) and not(text())]";
}
else if (p == "target")
{
r += "[false]";
}
else if (p == "first-of-type")
{
r += "[false]";
//r += "[.=(../*[local-name='roffe'][position()=1])]";
}
else if (reLang.IsMatch(p))
{
r += "[lang('" + reLang.Match(p).Groups[1].Value + "')]";
}
else if (reContains.IsMatch(p))
{
r += "[contains(string(.),'" + reContains.Match(p).Groups["stringvalue"].Value + "')]";
}
else if (reNth.IsMatch(p))
{
Match m = reNth.Match(p);
string type = m.Groups["type"].Value;
string exp = m.Groups["exp"].Value;
int a = 0;
int b = 0;
if (exp == "odd")
{
a = 2;
b = 1;
}
else if (exp == "even")
{
a = 2;
b = 0;
}
else
{
string v = m.Groups["a"].Value;
if (v.Length == 0)
{
a = 1;
}
else if (v.Equals("-"))
{
a = -1;
}
else
{
a = Int32.Parse(v);
}
if (m.Groups["b"].Success)
{
b = Int32.Parse(m.Groups["b"].Value);
}
}
if (type.Equals("nth-child") || type.Equals("nth-last-child"))
{
string axis;
if (type.Equals("nth-child"))
{
axis = "preceding-sibling";
}
else
{
axis = "following-sibling";
}
if (a == 0)
{
r += "[count(" + axis + "::*)+1=" + b + "]";
}
else
{
r += "[((count(" + axis + "::*)+1-" + b + ") mod " + a + "=0)and((count(" + axis + "::*)+1-" + b + ") div " + a + ">=0)]";
}
}
}
AddSpecificity(specificityA, specificityB, specificityC);
}
return(r);
}
private void PrintXPath(string sel, Hashtable nsTable)
{
XPathSelector xsel = new XPathSelector(sel, nsTable);
xsel.Matches(e);
// Console.WriteLine(xsel.XPath);
}