internal static bool TryGetRegisteredName(BackingFieldOrProperty backing, SemanticModel semanticModel, CancellationToken cancellationToken, out ArgumentSyntax nameArg, out string result)
{
nameArg = null;
result = null;
if (TryGetRegisterInvocationRecursive(backing, semanticModel, cancellationToken, out var invocation, out var method))
{
return(method.TryFindParameter("name", out var parameter) &&
invocation.TryFindArgument(parameter, out nameArg) &&
nameArg.TryGetStringValue(semanticModel, cancellationToken, out result));
}
if (TryGetDependencyAddOwnerSourceField(backing, semanticModel, cancellationToken, out var source) &&
!source.Symbol.Equals(backing.Symbol))
{
return(TryGetRegisteredName(source, semanticModel, cancellationToken, out nameArg, out result));
}
if (backing.Symbol.Locations.All(x => !x.IsInSource) &&
TryGetPropertyByName(backing, out var property))
{
result = property.Name;
return(true);
}
return(false);
}
private static bool IsCreatePropertyChangedEventArgsFor(this ExpressionSyntax newPropertyChangedEventArgs, IPropertySymbol property, SemanticModel semanticModel, CancellationToken cancellationToken)
{
var objectCreation = newPropertyChangedEventArgs as ObjectCreationExpressionSyntax;
if (objectCreation == null)
{
return(false);
}
ArgumentSyntax nameArg = null;
if (objectCreation.ArgumentList?.Arguments.TryGetSingle(out nameArg) == true)
{
string name;
if (nameArg.TryGetStringValue(semanticModel, cancellationToken, out name))
{
// raising with null or empty means that all properties notifies
// this is how a wpf binding sees it.
if (string.IsNullOrEmpty(name) ||
name == property.Name)
{
return(true);
}
}
}
return(false);
}
internal static bool TryGetRegisteredName(InvocationExpressionSyntax invocation, SemanticModel semanticModel, CancellationToken cancellationToken, out ArgumentSyntax nameArg, out string registeredName)
{
nameArg = null;
registeredName = null;
if (invocation == null)
{
return(false);
}
if (TryGetRegisterCall(invocation, semanticModel, cancellationToken, out var method) ||
TryGetRegisterReadOnlyCall(invocation, semanticModel, cancellationToken, out method) ||
TryGetRegisterAttachedCall(invocation, semanticModel, cancellationToken, out method) ||
TryGetRegisterAttachedReadOnlyCall(invocation, semanticModel, cancellationToken, out method))
{
return(method.TryFindParameter("name", out var parameter) &&
invocation.TryFindArgument(parameter, out nameArg) &&
nameArg.TryGetStringValue(semanticModel, cancellationToken, out registeredName));
}
if (invocation.Expression is MemberAccessExpressionSyntax memberAccess &&
(TryGetAddOwnerCall(invocation, semanticModel, cancellationToken, out _) ||
TryGetOverrideMetadataCall(invocation, semanticModel, cancellationToken, out _)))
{
if (semanticModel.TryGetSymbol(memberAccess.Expression, cancellationToken, out var symbol) &&
BackingFieldOrProperty.TryCreateForDependencyProperty(symbol, out var fieldOrProperty))
{
return(TryGetRegisteredName(fieldOrProperty, semanticModel, cancellationToken, out nameArg, out registeredName));
}
return(false);
}
return(false);
}
internal static bool TryGetRegisteredName(FieldOrProperty fieldOrProperty, SemanticModel semanticModel, CancellationToken cancellationToken, out ArgumentSyntax nameArg, out string result)
{
nameArg = null;
result = null;
if (fieldOrProperty.TryGetAssignedValue(cancellationToken, out var value) &&
value is InvocationExpressionSyntax invocation)
{
if (TryGetRegisterCall(invocation, semanticModel, cancellationToken, out _) &&
invocation.TryGetArgumentAtIndex(0, out nameArg))
{
return(nameArg.TryGetStringValue(semanticModel, cancellationToken, out result));
}
}
return(false);
}
