public CssSelector GetCombinatorSelector(string sel)
{
string newSel = sel.Replace("+", " + ").Replace("~", " ~ ").Replace(">", " > ");
string[] sep = new string[] { " " };
List <string> basicSels = newSel.Split(sep, StringSplitOptions.RemoveEmptyEntries).ToList();
int j = basicSels.Count - 1;
if (j == 0)
{
BasicCssSelector selector = (BasicCssSelector)GetBasicSelector(basicSels[j]);
return(selector);
}
else
{
Stack <CssSelector> stack = new Stack <CssSelector>();
while (j >= 0)
{
CombinatorCssSelector current = null;
CssSelector selectorRight = null;
if (stack.Count == 0)
{
selectorRight = (BasicCssSelector)GetBasicSelector(basicSels[j]);
j--;
}
else
{
selectorRight = stack.Pop();
}
string symbol = basicSels[j];
current = (CombinatorCssSelector)GetCurrentSelector(symbol);
j--;
if (j < 0)
{
current.right = selectorRight;
break;
}
BasicCssSelector selectorLeft = (BasicCssSelector)GetBasicSelector(basicSels[j]);
current.left = selectorLeft;
current.right = selectorRight;
stack.Push(current);
j--;
}
return(stack.Pop());
}
}
public CssSelector GetCurrentSelector(string symbol)
{
CssSelector current = null;
if (symbol.Equals("+"))
{
current = new CombinatorCssSelector("+", CssSelectorType.AdjacentSiblingSelector);
}
else if (symbol.Equals("~"))
{
current = new CombinatorCssSelector("~", CssSelectorType.GeneralSiblingSelector);
}
else if (symbol.Equals(">"))
{
current = new CombinatorCssSelector(">", CssSelectorType.ChildSelector);
}
else
{
current = new CombinatorCssSelector("", CssSelectorType.DescendantSelector);
(current as CombinatorCssSelector).left = GetBasicSelector(symbol);
}
return(current);
}
