private static void HandleInvocation(SyntaxNodeAnalysisContext context)
{
if (context.IsExcludedFromAnalysis())
{
return;
}
var invocation = (InvocationExpressionSyntax)context.Node;
var method = context.SemanticModel.GetSymbolSafe(invocation, context.CancellationToken) as IMethodSymbol;
if (method == KnownSymbol.PropertyChangedEventHandler.Invoke ||
PropertyChanged.IsInvoker(method, context.SemanticModel, context.CancellationToken) != AnalysisResult.No)
{
if (PropertyChanged.TryGetInvokedPropertyChangedName(invocation, context.SemanticModel, context.CancellationToken, out ArgumentSyntax nameArg, out string propertyName) == AnalysisResult.Yes)
{
var type = invocation.Expression is IdentifierNameSyntax ||
(invocation.Expression as MemberAccessExpressionSyntax)?.Expression is ThisExpressionSyntax ||
(invocation.Expression as MemberAccessExpressionSyntax)?.Expression is BaseExpressionSyntax ||
context.SemanticModel.GetSymbolSafe(invocation, context.CancellationToken) as IMethodSymbol == KnownSymbol.PropertyChangedEventHandler.Invoke
? context.ContainingSymbol.ContainingType
: context.SemanticModel.GetTypeInfoSafe((invocation.Expression as MemberAccessExpressionSyntax)?.Expression, context.CancellationToken)
.Type;
if (IsForExistingProperty(type, propertyName))
{
return;
}
if (invocation.Span.Contains(nameArg.Span))
{
context.ReportDiagnostic(Diagnostic.Create(Descriptor, nameArg.GetLocation()));
return;
}
if (method == KnownSymbol.PropertyChangedEventHandler.Invoke)
{
context.ReportDiagnostic(Diagnostic.Create(Descriptor, invocation.ArgumentList.Arguments[1].GetLocation()));
return;
}
if (invocation.ArgumentList.Arguments.Count == 1)
{
context.ReportDiagnostic(Diagnostic.Create(Descriptor, invocation.ArgumentList.Arguments[0].GetLocation()));
return;
}
context.ReportDiagnostic(Diagnostic.Create(Descriptor, invocation.GetLocation()));
}
}
}
private static void HandleMethodDeclaration(SyntaxNodeAnalysisContext context)
{
if (context.IsExcludedFromAnalysis())
{
return;
}
var method = (IMethodSymbol)context.ContainingSymbol;
if (method.Parameters.Length != 1 ||
method.Parameters[0].Type != KnownSymbol.String ||
method.Parameters[0].IsCallerMemberName())
{
return;
}
if (PropertyChanged.IsInvoker(method, context.SemanticModel, context.CancellationToken) == AnalysisResult.Yes)
{
var methodDeclaration = (MethodDeclarationSyntax)context.Node;
context.ReportDiagnostic(Diagnostic.Create(Descriptor, methodDeclaration.ParameterList.Parameters[0].GetLocation()));
}
}
private static void HandleInvocation(SyntaxNodeAnalysisContext context)
{
if (context.IsExcludedFromAnalysis())
{
return;
}
var property = (context.ContainingSymbol as IMethodSymbol)?.AssociatedSymbol as IPropertySymbol;
if (property == null)
{
return;
}
var invocation = (InvocationExpressionSyntax)context.Node;
if (invocation.ArgumentList?.Arguments.Count != 1)
{
return;
}
var method = context.SemanticModel.GetSymbolSafe(invocation, context.CancellationToken) as IMethodSymbol;
if (PropertyChanged.IsInvoker(method, context.SemanticModel, context.CancellationToken) == AnalysisResult.No)
{
return;
}
var argument = invocation.ArgumentList.Arguments[0];
if (argument.TryGetStringValue(context.SemanticModel, context.CancellationToken, out string text) &&
text == property.Name)
{
context.ReportDiagnostic(Diagnostic.Create(Descriptor, argument.GetLocation()));
}
}