private HashSet <RazorDiagnostic> Validate()
{
HashSet <RazorDiagnostic> diagnostics = null;
if (string.IsNullOrWhiteSpace(Name))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidTargetedAttributeNameNullOrWhitespace();
diagnostics ??= new();
diagnostics.Add(diagnostic);
}
else
{
var name = new StringSegment(Name);
var isDirectiveAttribute = this.IsDirectiveAttribute();
if (isDirectiveAttribute && name.StartsWith("@", StringComparison.Ordinal))
{
name = name.Subsegment(1);
}
else if (isDirectiveAttribute)
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidRequiredDirectiveAttributeName(GetDisplayName(), Name);
diagnostics ??= new();
diagnostics.Add(diagnostic);
}
for (var i = 0; i < name.Length; i++)
{
var character = name[i];
if (char.IsWhiteSpace(character) || HtmlConventions.IsInvalidNonWhitespaceHtmlCharacters(character))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidTargetedAttributeName(Name, character);
diagnostics ??= new();
diagnostics.Add(diagnostic);
}
}
}
return(diagnostics);
}
