/// <summary>
/// 创建层叠选择器
/// </summary>
/// <param name="relativeSelector">前置关系选择器</param>
/// <param name="selector">右选择器</param>
/// <returns></returns>
public static ISelector Create(CssRelativeSelector relativeSelector, ISelector selector)
{
if (relativeSelector == null)
{
throw new ArgumentNullException("relativeSelector");
}
if (selector == null)
{
throw new ArgumentNullException("selector");
}
var elementSelector = selector as CssElementSelector;
if (elementSelector != null)
{
return(new CssCasecadingSelector(relativeSelector, elementSelector));
}
var casecadingSelector = selector as CssCasecadingSelector;
if (casecadingSelector != null)
{
return(Combine(relativeSelector, casecadingSelector));
}
var multipleSelector = selector as CssMultipleSelector;
if (multipleSelector != null)
{
return(CssMultipleSelector.Combine(relativeSelector, multipleSelector));
}
throw new NotSupportedException();
}
public static ISelector Combine( CssRelativeSelector relativeSelector, CssMultipleSelector multipleSelector )
{
return new CssMultipleSelector( multipleSelector._selectors.Select( selector => CssCasecadingSelector.Create( relativeSelector, selector ) ).ToArray() );
}
public static ISelector Combine(CssRelativeSelector relativeSelector, CssMultipleSelector multipleSelector)
{
return(new CssMultipleSelector(multipleSelector._selectors.Select(selector => CssCasecadingSelector.Create(relativeSelector, selector)).ToArray()));
}
