public static string WrapElements(this string html, Func <Fragment, bool> matchElement, Func <string> before, Func <string> after, WrapElementsType wrapType)
{
StringBuilder sb = new StringBuilder(html.Length);
void AppendElement(WithinElementDomElementEvent ev)
{
if (ev.ElementEvent.Fragment != null)
{
sb.Append(html, ev.ElementEvent.Fragment.Trivia.StartPosition, ev.ElementEvent.Fragment.Trivia.Length);
}
}
var events = HtmlLexer.Read(html).WithInElement(matchElement, false);
events.ProcessElements(
outside: AppendElement,
onEnter: (ev) =>
{
switch (wrapType)
{
case WrapElementsType.ReplaceMatchedElements:
sb.Append(before?.Invoke());
break;
case WrapElementsType.AddOuterWrapper:
sb.Append(before?.Invoke());
AppendElement(ev);
break;
case WrapElementsType.AddInnerWrapper:
AppendElement(ev);
sb.Append(before?.Invoke());
break;
}
},
inside: AppendElement,
onExit: (ev) =>
{
switch (wrapType)
{
case WrapElementsType.ReplaceMatchedElements:
sb.Append(after?.Invoke());
break;
case WrapElementsType.AddOuterWrapper:
AppendElement(ev);
sb.Append(after?.Invoke());
break;
case WrapElementsType.AddInnerWrapper:
sb.Append(after?.Invoke());
AppendElement(ev);
break;
}
});
return(sb.ToString());
}
public static string WrapElements(this string html, Func <Fragment, bool> matchElement, string before, string after, WrapElementsType wrapType) => WrapElements(html, matchElement, () => before, () => after, wrapType);
