private Selector ParseSelector()
{
List <SimpleSelectorSequence> simpleSelectorSequences = new List <SimpleSelectorSequence>();
List <Combinator> combinators = new List <Combinator>();
Combinator combinator = null;
do
{
simpleSelectorSequences.Add(ParseSimpleSelectorSequence());
combinator = ParseCombinator();
if (combinator != null)
{
combinators.Add(combinator);
}
}while (combinator != null);
return(new Selector(simpleSelectorSequences, combinators));
}
private Combinator ParseCombinator()
{
Combinator combinator = null;
if (!End)
{
Dictionary <SelectorTokenType, Combinator> lookup = new Dictionary <SelectorTokenType, Combinator>()
{
{ SelectorTokenType.Plus, new AdjacentSiblingCombinator() },
{ SelectorTokenType.Greater, new ChildCombinator() },
{ SelectorTokenType.Tilde, new GeneralSiblingCombinator() },
{ SelectorTokenType.WhiteSpace, new DescendantCombinator() }
};
if (lookup.TryGetValue(CurrentToken.TokenType, out combinator))
{
currentPosition++;
SkipWhiteSpace();
}
}
return(combinator);
}