private static void Handle(SyntaxNodeAnalysisContext context)
{
if (!context.IsExcludedFromAnalysis() &&
context.ContainingSymbol is IEventSymbol eventSymbol &&
context.Node is EventDeclarationSyntax eventDeclaration &&
EventDeclarationWalker.TryGetCalls(eventDeclaration, out var addCall, out var removeCall))
{
if (addCall.TryGetMethodName(out var addName) &&
addName != "AddHandler")
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0104EventDeclarationAddHandlerInAdd,
addCall.GetLocation()));
}
if (removeCall.TryGetMethodName(out var removeName) &&
removeName != "RemoveHandler")
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0105EventDeclarationRemoveHandlerInRemove,
removeCall.GetLocation()));
}
if (addCall.TryGetArgumentAtIndex(0, out var addArg) &&
addArg.Expression is IdentifierNameSyntax addIdentifier &&
removeCall.TryGetArgumentAtIndex(0, out var removeArg) &&
removeArg.Expression is IdentifierNameSyntax removeIdentifier)
{
if (addIdentifier.Identifier.ValueText != removeIdentifier.Identifier.ValueText)
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0103EventDeclarationAddRemove,
eventDeclaration.Identifier.GetLocation(),
addIdentifier.Identifier.ValueText,
removeIdentifier.Identifier.ValueText));
}
else if (eventDeclaration.Parent is TypeDeclarationSyntax typeDeclaration &&
BackingFieldWalker.TryGetRegistration(typeDeclaration, addIdentifier.Identifier.ValueText, out var registration) &&
registration.ArgumentList is { })
private static void Handle(SyntaxNodeAnalysisContext context)
{
if (!context.IsExcludedFromAnalysis() &&
context.ContainingSymbol is IEventSymbol eventSymbol &&
context.Node is EventDeclarationSyntax eventDeclaration &&
EventDeclarationWalker.TryGetCalls(eventDeclaration, out var addCall, out var removeCall))
{
if (addCall.TryGetMethodName(out var addName) &&
addName != "AddHandler")
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0104EventDeclarationAddHandlerInAdd,
addCall.GetLocation()));
}
if (removeCall.TryGetMethodName(out var removeName) &&
removeName != "RemoveHandler")
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0105EventDeclarationRemoveHandlerInRemove,
removeCall.GetLocation()));
}
if (addCall.TryGetArgumentAtIndex(0, out var addArg) &&
addArg.Expression is IdentifierNameSyntax addIdentifier &&
removeCall.TryGetArgumentAtIndex(0, out var removeArg) &&
removeArg.Expression is IdentifierNameSyntax removeIdentifier)
{
if (addIdentifier.Identifier.ValueText != removeIdentifier.Identifier.ValueText)
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0103EventDeclarationAddRemove,
eventDeclaration.Identifier.GetLocation(),
addIdentifier.Identifier.ValueText,
removeIdentifier.Identifier.ValueText));
}
else if (BackingFieldWalker.TryGetRegistration(eventDeclaration.Parent as TypeDeclarationSyntax, addIdentifier.Identifier.ValueText, out var registration) &&
registration.ArgumentList != null)
{
if (registration.TryGetArgumentAtIndex(0, out var nameARg) &&
nameARg.TryGetStringValue(context.SemanticModel, context.CancellationToken, out var registeredName) &&
registeredName != eventSymbol.Name)
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0102EventDeclarationName,
eventDeclaration.Identifier.GetLocation(),
ImmutableDictionary <string, string> .Empty.Add("ExpectedName", registeredName),
registeredName));
}
if (registration.TryGetArgumentAtIndex(2, out var handlerTypeArg) &&
handlerTypeArg.TryGetTypeofValue(context.SemanticModel, context.CancellationToken, out var registeredHandlerType) &&
!registeredHandlerType.Equals(eventSymbol.Type))
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0106EventDeclarationUseRegisteredHandlerType,
eventDeclaration.Type.GetLocation(),
registeredHandlerType.MetadataName));
}
}
}
}
}
