private static IReadOnlyList <IntermediateToken> GetAttributeContent(IntermediateNode node)
{
var nodes = node.FindDescendantNodes <TemplateIntermediateNode>();
var template = nodes.Count > 0 ? nodes[0] : default;
if (template != null)
{
// See comments in TemplateDiagnosticPass
node.Diagnostics.Add(ComponentDiagnosticFactory.Create_TemplateInvalidLocation(template.Source));
return(new[] { new IntermediateToken()
{
Kind = TokenKind.CSharp, Content = string.Empty,
}, });
}
if (node.Children.Count == 1 && node.Children[0] is HtmlContentIntermediateNode htmlContentNode)
{
// This case can be hit for a 'string' attribute. We want to turn it into
// an expression.
var tokens = htmlContentNode.FindDescendantNodes <IntermediateToken>();
var content = "\"" + string.Join(string.Empty, tokens.Select(t => t.Content.Replace("\"", "\\\""))) + "\"";
return(new[] { new IntermediateToken()
{
Content = content, Kind = TokenKind.CSharp,
} });
}
else
{
return(node.FindDescendantNodes <IntermediateToken>());
}
}
private bool ShouldGenerateField(IntermediateNode parent)
{
var parameters = parent.FindDescendantNodes <TagHelperDirectiveAttributeParameterIntermediateNode>();
for (var i = 0; i < parameters.Count; i++)
{
var parameter = parameters[i];
if (parameter.TagHelper.IsRefTagHelper() && parameter.BoundAttributeParameter.Name == "suppressField")
{
if (parameter.HasDiagnostics)
{
parent.Diagnostics.AddRange(parameter.GetAllDiagnostics());
}
parent.Children.Remove(parameter);
if (parameter.AttributeStructure == AttributeStructure.Minimized)
{
return(false);
}
// We do not support non-minimized attributes here because we can't allow the value to be dynamic.
// As a design/experience decision, we don't let you write @ref:suppressField="false" even though
// we could parse it. The rationale is that it's misleading, you type something that looks like code,
// but it's not really.
parent.Diagnostics.Add(ComponentDiagnosticFactory.Create_RefSuppressFieldNotMinimized(parameter.Source));
}
}
if (parent is ComponentIntermediateNode component && component.Component.IsGenericTypedComponent())
{
// We cannot automatically generate a 'ref' field for generic components because we don't know
// how to write the type.
parent.Diagnostics.Add(ComponentDiagnosticFactory.Create_RefSuppressFieldRequiredForGeneric(parent.Source));
return(false);
}
return(true);
}
public static RazorDiagnostic Create_UnsupportedComplexContent(IntermediateNode node, string attributeName)
{
var content = string.Join("", node.FindDescendantNodes <IntermediateToken>().Select(t => t.Content));
return(RazorDiagnostic.Create(UnsupportedComplexContent, node.Source ?? SourceSpan.Undefined, attributeName, content));
}