private Selector(string query, Element root)
{
Validate.NotNull(query);
query = query.Trim();
Validate.NotEmpty(query);
Validate.NotNull(root);
this.evaluator = QueryParser.Parse(query);
this.root = root;
}
/// <summary>
/// Build a list of elements,
/// by visiting root and every descendant of root, and testing it against the evaluator.
/// </summary>
/// <param name="eval">Evaluator to test elements against</param>
/// <param name="root">root of tree to descend</param>
/// <returns>list of matches; empty if none</returns>
public static Elements Collect(Evaluator eval, Element root)
{
Elements elements = new Elements();
new NodeTraversor(new Collector.Accumulator(root, elements, eval)).Traverse(root);
return elements;
}
internal Accumulator(Element root, Elements elements, Evaluator eval)
{
this.root = root;
this.elements = elements;
this.eval = eval;
}
public Parent(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public ImmediateParent(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public ImmediatePreviousSibling(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public Not(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public PreviousSibling(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public ImmediatePreviousSibling(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public ImmediateParent(Evaluator evaluator)
{
this.evaluator = evaluator;
}
internal Accumulator(Element root, Elements elements, Evaluator eval)
{
this.root = root;
this.elements = elements;
this.eval = eval;
}
public Parent(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public Not(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public Has(Evaluator evaluator)
{
this.evaluator = evaluator;
}
internal void ReplaceRightMostEvaluator(Evaluator replacement)
{
evaluators[num - 1] = replacement;
}
public Has(Evaluator evaluator)
{
this.evaluator = evaluator;
}
public void Add(Evaluator e)
{
evaluators.Add(e);
UpdateNumEvaluators();
}
public PreviousSibling(Evaluator evaluator)
{
this.evaluator = evaluator;
}