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using System.Collections.Immutable;
using System.Linq;
using System.Threading;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Diagnostics;
namespace Godot.SourceGenerators
{
[DiagnosticAnalyzer(LanguageNames.CSharp)]
public class EventHandlerSuffixSuppressor : DiagnosticSuppressor
{
private static readonly SuppressionDescriptor _descriptor = new(
id: "GDSP0001",
suppressedDiagnosticId: "CA1711",
justification: "Signal delegates are used in events so the naming follows the guidelines.");
public override ImmutableArray<SuppressionDescriptor> SupportedSuppressions =>
ImmutableArray.Create(_descriptor);
public override void ReportSuppressions(SuppressionAnalysisContext context)
{
foreach (var diagnostic in context.ReportedDiagnostics)
{
AnalyzeDiagnostic(context, diagnostic, context.CancellationToken);
}
}
private static void AnalyzeDiagnostic(SuppressionAnalysisContext context, Diagnostic diagnostic, CancellationToken cancellationToken = default)
{
var location = diagnostic.Location;
var root = location.SourceTree?.GetRoot(cancellationToken);
var dds = root?
.FindNode(location.SourceSpan)
.DescendantNodesAndSelf()
.OfType<DelegateDeclarationSyntax>()
.FirstOrDefault();
if (dds == null)
return;
var semanticModel = context.GetSemanticModel(dds.SyntaxTree);
var delegateSymbol = semanticModel.GetDeclaredSymbol(dds, cancellationToken);
if (delegateSymbol == null)
return;
if (delegateSymbol.GetAttributes().Any(a => a.AttributeClass?.IsGodotSignalAttribute() ?? false))
{
context.ReportSuppression(Suppression.Create(_descriptor, diagnostic));
}
}
}
}
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