/// <summary>
/// Emits a stream of events
/// </summary>
/// <param name="fragments">The lexed HTML fragments</param>
/// <param name="matchElement">A function to match which element should be considered the "outside" element to process</param>
/// <param name="includeClosingElementWithin">
/// If true, IsWithin will be true of the final closing element. This can be handy
/// for handling different scenarios. For extracting with the outer value, you probably want this to be true.
/// For extrating just the inner value, you would want this to be false.
/// </param>
/// <returns></returns>
public static IEnumerable <WithinElementDomElementEvent> WithInElement(this IEnumerable <Fragment> fragments, Func <Fragment, bool> matchElement, bool includeClosingElementWithin)
{
bool isInsideFragment = false;
int stack = 0;
foreach (var item in LexedDomParser.Execute(fragments))
{
switch (item.Type)
{
case DomElementEventType.Push:
case DomElementEventType.Child:
if (isInsideFragment)
{
yield return(new WithinElementDomElementEvent(item, true));
if (item.Type == DomElementEventType.Push)
{
stack++;
}
}
else
{
if (matchElement(item.Fragment))
{
isInsideFragment = true;
stack = 1;
yield return(new WithinElementDomElementEvent(item, true));
}
else
{
yield return(new WithinElementDomElementEvent(item, false));
}
}
break;
case DomElementEventType.Pop:
if (isInsideFragment)
{
stack--;
if (stack <= 0)
{
isInsideFragment = false;
}
yield return(new WithinElementDomElementEvent(item, includeClosingElementWithin ? true : isInsideFragment));
}
else
{
yield return(new WithinElementDomElementEvent(item, false));
}
break;
}
}
}
public static IEnumerable <DomElementEvent> Execute(IEnumerable <Fragment> fragments)
{
var parser = new LexedDomParser();
return(parser._Execute(fragments));
}