public sealed override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var document = context.Document;
var textSpan = context.Span;
var cancellationToken = context.CancellationToken;
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false) as CompilationUnitSyntax;
var model = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
// if length is 0 then no particular range is selected, so pick the first enclosing member
if (textSpan.Length == 0)
{
var decl = root.FindToken(textSpan.Start).Parent.AncestorsAndSelf().OfType <MemberDeclarationSyntax>().FirstOrDefault();
if (decl != null)
{
textSpan = decl.FullSpan;
}
}
var properties = ExpansionChecker.GetExpandableProperties(textSpan, root, model);
if (properties.Any())
{
#pragma warning disable RS0005
context.RegisterRefactoring(
CodeAction.Create("Implement INotifyPropertyChanged interface", (c) =>
ImplementNotifyPropertyChangedAsync(document, root, model, properties, c)));
#pragma warning restore RS0005
}
}
private static PropertyDeclarationSyntax ExpandProperty(PropertyDeclarationSyntax property, string backingFieldName)
{
AccessorDeclarationSyntax getter, setter;
if (!ExpansionChecker.TryGetAccessors(property, out getter, out setter))
{
throw new ArgumentException();
}
if (getter.Body == null)
{
var returnFieldStatement = SyntaxFactory.ParseStatement(string.Format("return {0};", backingFieldName));
getter = getter
.WithBody(SyntaxFactory.Block(SyntaxFactory.SingletonList(returnFieldStatement)));
}
getter = getter
.WithSemicolonToken(default(SyntaxToken));
var setPropertyStatement = SyntaxFactory.ParseStatement($"{backingFieldName} = value;"); //string.Format("SetProperty(ref {0}, value, \"{1}\");", backingFieldName, property.Identifier.ValueText));
var changeInvocation = SyntaxFactory.ParseStatement("OnPropertyChanged();");
setter = setter
.WithBody(SyntaxFactory.Block(new List <StatementSyntax>()
{
setPropertyStatement, changeInvocation
}.ToArray()))
.WithSemicolonToken(default(SyntaxToken));
var newProperty = property
.WithAccessorList(SyntaxFactory.AccessorList(SyntaxFactory.List(new[] { getter, setter })))
.WithAdditionalAnnotations(Formatter.Annotation);
return(newProperty);
}