/// <summary>
/// Appends the LAST selector to the complex of selectors.
/// </summary>
/// <param name="selector">The (final) selector to append.</param>
/// <returns>The current complex selector.</returns>
public ComplexSelector ConcludeSelector(Selector selector)
{
if (!IsReady)
{
selectors.Add(new CombinatorSelector { selector = selector, transform = null });
IsReady = true;
}
return this;
}
/// <summary>
/// Appends a selector to the complex of selectors.
/// </summary>
/// <param name="selector">The selector to append.</param>
/// <param name="combinator">The combinator to use.</param>
/// <returns>The current complex selector.</returns>
public ComplexSelector AppendSelector(Selector selector, CssCombinator combinator)
{
if (IsReady)
return this;
Func<Element, IEnumerable<Element>> transform = null;
char delim;
switch (combinator)
{
case CssCombinator.Child:
delim = Specification.GT;
transform = el => Single(el.ParentElement);
break;
case CssCombinator.AdjacentSibling:
delim = Specification.PLUS;
transform = el => Single(el.PreviousElementSibling);
break;
case CssCombinator.Descendent:
delim = Specification.SPACE;
transform = el =>
{
var parents = new List<Element>();
var parent = el.ParentElement;
while(parent != null)
{
parents.Add(parent);
parent = parent.ParentElement;
}
return parents;
};
break;
case CssCombinator.Sibling:
delim = Specification.TILDE;
transform = el =>
{
var parent = el.ParentElement;
if (parent == null)
return new Element[0];
var kids = parent.Children;
var passed = false;
var siblings = new List<Element>();
for (int i = kids.Length - 1; i >= 0; i--)
{
if (kids[i] == el)
passed = true;
else if (passed)
siblings.Add(kids[i]);
}
return siblings;
};
break;
default:
return this;
}
selectors.Add(new CombinatorSelector { selector = selector, transform = transform, delimiter = delim });
return this;
}