private static IReadOnlyList <IntermediateToken> GetAttributeContent(TagHelperPropertyIntermediateNode node)
{
var template = node.FindDescendantNodes <TemplateIntermediateNode>().FirstOrDefault();
if (template != null)
{
// See comments in TemplateDiagnosticPass
node.Diagnostics.Add(BlazorDiagnosticFactory.CreateTemplate_InvalidLocation(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)) + "\"";
return(new[] { new IntermediateToken()
{
Content = content, Kind = TokenKind.CSharp,
} });
}
else
{
return(node.FindDescendantNodes <IntermediateToken>());
}
}
protected override void ExecuteCore(RazorCodeDocument codeDocument, DocumentIntermediateNode documentNode)
{
var visitor = new Visitor();
visitor.Visit(documentNode);
for (var i = 0; i < visitor.Candidates.Count; i++)
{
var candidate = visitor.Candidates[i];
candidate.Parent.Diagnostics.Add(BlazorDiagnosticFactory.CreateTemplate_InvalidLocation(candidate.Node.Source));
// Remove the offending node since we don't know how to render it. This means that the user won't get C#
// completion at this location, which is fine because it's inside an HTML attribute.
candidate.Remove();
}
}
private static IntermediateToken GetAttributeContent(TagHelperPropertyIntermediateNode node)
{
var template = node.FindDescendantNodes <TemplateIntermediateNode>().FirstOrDefault();
if (template != null)
{
// See comments in TemplateDiagnosticPass
node.Diagnostics.Add(BlazorDiagnosticFactory.CreateTemplate_InvalidLocation(template.Source));
return(new IntermediateToken()
{
Kind = TokenKind.CSharp, Content = string.Empty,
});
}
if (node.Children[0] is HtmlContentIntermediateNode htmlContentNode)
{
// This case can be hit for a 'string' attribute. We want to turn it into
// an expression.
var content = "\"" + string.Join(string.Empty, htmlContentNode.Children.OfType <IntermediateToken>().Select(t => t.Content)) + "\"";
return(new IntermediateToken()
{
Kind = TokenKind.CSharp, Content = content
});
}
else if (node.Children[0] is CSharpExpressionIntermediateNode cSharpNode)
{
// This case can be hit when the attribute has an explicit @ inside, which
// 'escapes' any special sugar we provide for codegen.
return(GetToken(cSharpNode));
}
else
{
// This is the common case for 'mixed' content
return(GetToken(node));
}
// In error cases we won't have a single token, but we still want to generate the code.
IntermediateToken GetToken(IntermediateNode parent)
{
return
(parent.Children.Count == 1 ? (IntermediateToken)parent.Children[0] : new IntermediateToken()
{
Kind = TokenKind.CSharp,
Content = string.Join(string.Empty, parent.Children.OfType <IntermediateToken>().Select(t => t.Content)),
});
}
}
