private IEnumerable <RazorDiagnostic> Validate()
{
// data-* attributes are explicitly not implemented by user agents and are not intended for use on
// the server; therefore it's invalid for TagHelpers to bind to them.
const string DataDashPrefix = "data-";
if (string.IsNullOrWhiteSpace(Name))
{
if (IndexerAttributeNamePrefix == null)
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeNullOrWhitespace(
_parent.GetDisplayName(),
GetDisplayName());
yield return(diagnostic);
}
}
else
{
if (Name.StartsWith(DataDashPrefix, StringComparison.OrdinalIgnoreCase))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeNameStartsWith(
_parent.GetDisplayName(),
GetDisplayName(),
Name);
yield return(diagnostic);
}
foreach (var character in Name)
{
if (char.IsWhiteSpace(character) || HtmlConventions.InvalidNonWhitespaceHtmlCharacters.Contains(character))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeName(
_parent.GetDisplayName(),
GetDisplayName(),
Name,
character);
yield return(diagnostic);
}
}
}
if (IndexerAttributeNamePrefix != null)
{
if (IndexerAttributeNamePrefix.StartsWith(DataDashPrefix, StringComparison.OrdinalIgnoreCase))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributePrefixStartsWith(
_parent.GetDisplayName(),
GetDisplayName(),
IndexerAttributeNamePrefix);
yield return(diagnostic);
}
else if (IndexerAttributeNamePrefix.Length > 0 && string.IsNullOrWhiteSpace(IndexerAttributeNamePrefix))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeNullOrWhitespace(
_parent.GetDisplayName(),
GetDisplayName());
yield return(diagnostic);
}
else
{
foreach (var character in IndexerAttributeNamePrefix)
{
if (char.IsWhiteSpace(character) || HtmlConventions.InvalidNonWhitespaceHtmlCharacters.Contains(character))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributePrefix(
_parent.GetDisplayName(),
GetDisplayName(),
IndexerAttributeNamePrefix,
character);
yield return(diagnostic);
}
}
}
}
}
private IEnumerable <RazorDiagnostic> Validate()
{
// data-* attributes are explicitly not implemented by user agents and are not intended for use on
// the server; therefore it's invalid for TagHelpers to bind to them.
const string DataDashPrefix = "data-";
var isDirectiveAttribute = this.IsDirectiveAttribute();
if (string.IsNullOrWhiteSpace(Name))
{
if (IndexerAttributeNamePrefix == null)
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeNullOrWhitespace(
_parent.GetDisplayName(),
GetDisplayName());
yield return(diagnostic);
}
}
else
{
if (Name.StartsWith(DataDashPrefix, StringComparison.OrdinalIgnoreCase))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeNameStartsWith(
_parent.GetDisplayName(),
GetDisplayName(),
Name);
yield return(diagnostic);
}
StringSegment name = Name;
if (isDirectiveAttribute && name.StartsWith("@", StringComparison.Ordinal))
{
name = name.Subsegment(1);
}
else if (isDirectiveAttribute)
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundDirectiveAttributeName(
_parent.GetDisplayName(),
GetDisplayName(),
Name);
yield return(diagnostic);
}
for (var i = 0; i < name.Length; i++)
{
var character = name[i];
if (char.IsWhiteSpace(character) || HtmlConventions.InvalidNonWhitespaceHtmlCharacters.Contains(character))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeName(
_parent.GetDisplayName(),
GetDisplayName(),
name.Value,
character);
yield return(diagnostic);
}
}
}
if (IndexerAttributeNamePrefix != null)
{
if (IndexerAttributeNamePrefix.StartsWith(DataDashPrefix, StringComparison.OrdinalIgnoreCase))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributePrefixStartsWith(
_parent.GetDisplayName(),
GetDisplayName(),
IndexerAttributeNamePrefix);
yield return(diagnostic);
}
else if (IndexerAttributeNamePrefix.Length > 0 && string.IsNullOrWhiteSpace(IndexerAttributeNamePrefix))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributeNullOrWhitespace(
_parent.GetDisplayName(),
GetDisplayName());
yield return(diagnostic);
}
else
{
StringSegment indexerPrefix = IndexerAttributeNamePrefix;
if (isDirectiveAttribute && indexerPrefix.StartsWith("@", StringComparison.Ordinal))
{
indexerPrefix = indexerPrefix.Subsegment(1);
}
else if (isDirectiveAttribute)
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundDirectiveAttributePrefix(
_parent.GetDisplayName(),
GetDisplayName(),
indexerPrefix.Value);
yield return(diagnostic);
}
for (var i = 0; i < indexerPrefix.Length; i++)
{
var character = indexerPrefix[i];
if (char.IsWhiteSpace(character) || HtmlConventions.InvalidNonWhitespaceHtmlCharacters.Contains(character))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidBoundAttributePrefix(
_parent.GetDisplayName(),
GetDisplayName(),
indexerPrefix.Value,
character);
yield return(diagnostic);
}
}
}
}
}