private static HtmlNode NavigateToElement(HtmlNode htmlNode, HtmlNavigationType htmlNavigationType)
{
switch (htmlNavigationType)
{
case HtmlNavigationType.PreviousSibling:
{
return(htmlNode.PreviousSibling);
}
case HtmlNavigationType.NextSibling:
{
return(htmlNode.NextSibling);
}
case HtmlNavigationType.Parent:
{
return(htmlNode.ParentNode);
}
case HtmlNavigationType.FirstChild:
{
return(htmlNode.FirstChild);
}
default:
throw new NotImplementedException(htmlNavigationType.ToString());
}
}
internal static HtmlNode NavigateToElementOfType(this HtmlNode htmlNode, string typeName, HtmlNavigationType htmlNavigationType)
{
var result = NavigateToElement(htmlNode, htmlNavigationType);
while (result != null && result.Name != typeName)
{
result = NavigateToElement(result, htmlNavigationType);
}
return(result);
}
internal static HtmlNode NavigateToElement(this HtmlNode htmlNode, Func <HtmlNode, bool> predicate, HtmlNavigationType htmlNavigationType)
{
var result = NavigateToElement(htmlNode, htmlNavigationType);
while (result != null && !predicate(result))
{
result = NavigateToElement(result, predicate, htmlNavigationType);
}
return(result);
}