private static CssSelector Flatten(CssComplexSelector complex)
{
if (complex.Items.Length != 1)
{
return(complex);
}
var compound = complex.Items[0].Selector;
if (compound.Selectors.Length == 1)
{
return(compound.Selectors[0]);
}
return(compound);
}
private static bool TryParseComplexSelector(CssStringStreamReader reader, out CssComplexSelector selector)
{
var items = new List <CssComplexSelectorItem>();
while (!reader.IsEndOfStream)
{
if (!TryParseCompoundSelector(reader, out var compound))
{
if (items.Count > 0)
{
var last = items[items.Count - 1];
if (last.Combinator == CssCombinatorType.Descendant)
{
// remove the last items combinator
items[items.Count - 1] = new CssComplexSelectorItem(last.Selector, null);
}
else
{
items.Clear();
}
}
break;
}
var hasCombinator = reader.TryReadCombinatorType(out var combinator);
items.Add(hasCombinator
? new CssComplexSelectorItem(compound, combinator)
: new CssComplexSelectorItem(compound, null));
if (!hasCombinator)
{
break;
}
}
selector = items.Count > 0 ? new CssComplexSelector(items.ToArray()) : null;
return(selector != null);
}
public virtual void VisitComplexSelector(CssComplexSelector selector) => DefaultVisit(selector);
