private static void Handle(SyntaxNodeAnalysisContext context)
{
if (!context.IsExcludedFromAnalysis() &&
context.Node is InvocationExpressionSyntax invocation &&
TryGetArgs(context, out var target, out var propertyArg, out var valueArg) &&
context.SemanticModel.TryGetSymbol(propertyArg.Expression, context.CancellationToken, out var symbol) &&
BackingFieldOrProperty.Match(symbol) is { } backing)
{
if (IsWrongType(backing, valueArg, context) is { } registeredType)
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0014SetValueMustUseRegisteredType,
valueArg.GetLocation(),
target.Name,
registeredType));
}
if (backing.Type == KnownSymbols.DependencyProperty &&
backing.FindKey(context.SemanticModel, context.CancellationToken) is { } keyField)
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0040SetUsingDependencyPropertyKey,
propertyArg.GetLocation(),
properties: ImmutableDictionary <string, string?> .Empty.Add(nameof(DependencyPropertyKeyType), keyField.Name),
propertyArg,
keyField.CreateArgument(context.SemanticModel, propertyArg.SpanStart)));
}
if (target == KnownSymbols.DependencyObject.SetCurrentValue &&
backing.Symbol is IFieldSymbol setField &&
(setField == KnownSymbols.FrameworkElement.DataContextProperty ||
setField.Name == "StyleProperty"))
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0043DoNotUseSetCurrentValue,
invocation.GetLocation(),
setField.Name,
invocation.ArgumentList.Arguments[1]));
}
}
}
