public static IList <HtmlNode> QuerySelectorAll(this IEnumerable <HtmlNode> nodes, string cssSelector)
{
if (cssSelector == null)
{
throw new ArgumentNullException(nameof(cssSelector));
}
if (cssSelector.Contains(','))
{
var combinedSelectors = cssSelector.Split(',');
var rt = nodes.QuerySelectorAll(combinedSelectors[0]);
foreach (var s in combinedSelectors.Skip(1))
{
foreach (var n in nodes.QuerySelectorAll(s))
{
if (!rt.Contains(n))
{
rt.Add(n);
}
}
}
return(rt);
}
cssSelector = cssSelector.Trim();
var selectors = CssSelector.Parse(cssSelector);
bool allowTraverse = true;
for (int i = 0; i < selectors.Count; i++)
{
var selector = selectors[i];
if (allowTraverse && selector.AllowTraverse)
{
// If this is not the first selector then we must make filter against the child nodes of the current set of nodes
// since any selector that follows another selector always scopes down the nodes to the descendants of the last scope.
// Example: "span span" Should only resolve with span elements that are descendants of another span element.
// Any span elements that are not descendant of another span element shoud not be included in the output.
if (i > 0)
{
nodes = nodes.SelectMany(n => n.ChildNodes);
}
nodes = Traverse(nodes);
}
nodes = selector.Filter(nodes);
allowTraverse = selector.AllowTraverse;
}
return(nodes.Distinct().ToList());
}
public static IList <HtmlNode> QuerySelectorAll(this IEnumerable <HtmlNode> nodes, string cssSelector)
{
if (cssSelector == null)
{
throw new ArgumentNullException(nameof(cssSelector));
}
if (cssSelector.Contains(','))
{
var combinedSelectors = cssSelector.Split(',');
var rt = nodes.QuerySelectorAll(combinedSelectors[0]);
foreach (var s in combinedSelectors.Skip(1))
{
foreach (var n in nodes.QuerySelectorAll(s))
{
if (!rt.Contains(n))
{
rt.Add(n);
}
}
}
return(rt);
}
cssSelector = cssSelector.Trim();
var selectors = CssSelector.Parse(cssSelector);
bool allowTraverse = true;
foreach (var selector in selectors)
{
if (allowTraverse && selector.AllowTraverse)
{
nodes = Traverse(nodes);
}
nodes = selector.Filter(nodes);
allowTraverse = selector.AllowTraverse;
}
return(nodes.Distinct().ToList());
}