private HashSet <RazorDiagnostic> Validate()
{
HashSet <RazorDiagnostic> diagnostics = null;
if (string.IsNullOrWhiteSpace(TagName))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidTargetedTagNameNullOrWhitespace();
diagnostics ??= new();
diagnostics.Add(diagnostic);
}
else if (TagName != TagHelperMatchingConventions.ElementCatchAllName)
{
foreach (var character in TagName)
{
if (char.IsWhiteSpace(character) || HtmlConventions.IsInvalidNonWhitespaceHtmlCharacters(character))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidTargetedTagName(TagName, character);
diagnostics ??= new();
diagnostics.Add(diagnostic);
}
}
}
if (ParentTag != null)
{
if (string.IsNullOrWhiteSpace(ParentTag))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidTargetedParentTagNameNullOrWhitespace();
diagnostics ??= new();
diagnostics.Add(diagnostic);
}
else
{
foreach (var character in ParentTag)
{
if (char.IsWhiteSpace(character) || HtmlConventions.IsInvalidNonWhitespaceHtmlCharacters(character))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidTargetedParentTagName(ParentTag, character);
diagnostics ??= new();
diagnostics.Add(diagnostic);
}
}
}
}
return(diagnostics);
}
