internal static bool TryFind(ITypeSymbol type, SemanticModel semanticModel, CancellationToken cancellationToken, [NotNullWhen(true)] out IMethodSymbol?invoker)
{
if (PropertyChangedEvent.TryFind(type, out var propertyChangedEvent))
{
return(TryFind(propertyChangedEvent, semanticModel, cancellationToken, out invoker));
}
invoker = null;
return(false);
}
private static void Handle(SyntaxNodeAnalysisContext context)
{
if (!context.IsExcludedFromAnalysis() &&
context.ContainingSymbol is INamedTypeSymbol {
IsStatic : false
} type&&
context.Node is ClassDeclarationSyntax classDeclaration &&
!IsExcludedType())
{
if (classDeclaration.Members.TryFirstOfType(x => Property.ShouldNotify(x, context.SemanticModel, context.CancellationToken), out PropertyDeclarationSyntax _))
{
var properties = string.Join(
Environment.NewLine,
classDeclaration.Members.OfType <PropertyDeclarationSyntax>()
.Where(x => Property.ShouldNotify(x, context.SemanticModel, context.CancellationToken))
.Select(x => x.Identifier.ValueText));
context.ReportDiagnostic(Diagnostic.Create(Descriptors.INPC001ImplementINotifyPropertyChanged, classDeclaration.Identifier.GetLocation(), $"The class {type.Name} should notify for:{Environment.NewLine}{properties}"));
}
if (PropertyChangedEvent.TryFind(type, out var eventSymbol))
{
if (eventSymbol.IsStatic)
{
return;
}
context.ReportDiagnostic(Diagnostic.Create(Descriptors.INPC001ImplementINotifyPropertyChanged, classDeclaration.Identifier.GetLocation(), $"The class {type.Name} has event PropertyChanged but does not implement INotifyPropertyChanged."));
}
}
bool IsExcludedType()
{
return(type.IsAssignableTo(KnownSymbol.INotifyPropertyChanged, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.Attribute, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.IEnumerator, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.Stream, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.MarkupExtension, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.IValueConverter, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.IMultiValueConverter, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.DataTemplateSelector, context.Compilation) ||
type.IsAssignableTo(KnownSymbol.DependencyObject, context.Compilation));
}
}
