private void ValidateParentAllowsContent(Span child, ErrorSink errorSink)
{
if (HasAllowedChildren())
{
var content = child.Content;
if (!string.IsNullOrWhiteSpace(content))
{
var trimmedStart = content.TrimStart();
var whitespace = content.Substring(0, content.Length - trimmedStart.Length);
var errorStart = SourceLocationTracker.Advance(child.Start, whitespace);
var length = trimmedStart.TrimEnd().Length;
var allowedChildren = _currentTagHelperTracker.AllowedChildren;
var allowedChildrenString = string.Join(", ", allowedChildren);
errorSink.OnError(
errorStart,
LegacyResources.FormatTagHelperParseTreeRewriter_CannotHaveNonTagContent(
_currentTagHelperTracker.TagName,
allowedChildrenString),
length);
}
}
}
