private static async Task <Document> ImplementIDisposable(Document document, SyntaxNode declaration, CancellationToken cancellationToken)
{
DocumentEditor editor = await DocumentEditor.CreateAsync(document, cancellationToken).ConfigureAwait(false);
SyntaxGenerator generator = editor.Generator;
SemanticModel model = editor.SemanticModel;
// Add the interface to the baselist.
SyntaxNode interfaceType = generator.TypeExpression(WellKnownTypes.IDisposable(model.Compilation));
editor.AddInterfaceType(declaration, interfaceType);
// Find a Dispose method. If one exists make that implement IDisposable, else generate a new method.
var typeSymbol = model.GetDeclaredSymbol(declaration) as INamedTypeSymbol;
IMethodSymbol disposeMethod = (typeSymbol?.GetMembers("Dispose"))?.OfType <IMethodSymbol>()?.Where(m => m.Parameters.Length == 0).FirstOrDefault();
if (disposeMethod != null && disposeMethod.DeclaringSyntaxReferences.Length == 1)
{
SyntaxNode memberPartNode = await disposeMethod.DeclaringSyntaxReferences.Single().GetSyntaxAsync(cancellationToken).ConfigureAwait(false);
memberPartNode = generator.GetDeclaration(memberPartNode);
editor.ReplaceNode(memberPartNode, generator.AsPublicInterfaceImplementation(memberPartNode, interfaceType));
}
else
{
SyntaxNode throwStatement = generator.ThrowStatement(generator.ObjectCreationExpression(WellKnownTypes.NotImplementedException(model.Compilation)));
SyntaxNode member = generator.MethodDeclaration(TypesThatOwnDisposableFieldsShouldBeDisposableAnalyzer <SyntaxNode> .Dispose, statements: new[] { throwStatement });
member = generator.AsPublicInterfaceImplementation(member, interfaceType);
editor.AddMember(declaration, member);
}
return(editor.GetChangedDocument());
}
public static void AddInterfaceIfNeeded(this DocumentEditor editor, ClassDeclarationSyntax oldClass,
IdentifierNameSyntax baseClass)
{
if (oldClass.BaseList != null && oldClass.BaseList.Types.Any(bts =>
bts.DescendantNodes <IdentifierNameSyntax>()
.Any(ins => ins.Identifier.Text == baseClass.Identifier.Text)))
{
return;
}
var model = editor.SemanticModel;
var oc = model.GetDeclaredSymbol(oldClass);
if (oc.AllInterfaces.Any(i => i.Name == baseClass.Identifier.Text))
{
return;
}
editor.AddInterfaceType(oldClass, baseClass);
}
public static void ImplementIIrcConnection(CodeFixContext context, SemanticModel semanticModel, ClassDeclarationSyntax classDeclaration, DocumentEditor editor)
{
var type = (ITypeSymbol)semanticModel.GetDeclaredSymbol(classDeclaration, context.CancellationToken);
editor.AddInterfaceType(classDeclaration, SyntaxFactory.ParseTypeName("DigiBotExtension.IIrcConnection").WithTrailingTrivia(SyntaxFactory.ElasticMarker).WithAdditionalAnnotations(Simplifier.Annotation, SyntaxAnnotation.ElasticAnnotation));
}
private static void ImplementINotifyPropertyChanged(CodeFixContext context, SemanticModel semanticModel, ClassDeclarationSyntax classDeclaration, DocumentEditor editor)
{
var type = (ITypeSymbol)semanticModel.GetDeclaredSymbol(classDeclaration, context.CancellationToken);
var underscoreFields = CodeStyle.UnderscoreFields(semanticModel);
if (!type.Is(KnownSymbol.INotifyPropertyChanged))
{
if (classDeclaration.BaseList != null &&
classDeclaration.BaseList.Types.TryFirst(
x => (x.Type as IdentifierNameSyntax)?.Identifier.ValueText.Contains("INotifyPropertyChanged") == true,
out var baseType) &&
context.Diagnostics.Any(IsINotifyPropertyChangedMissing))
{
editor.ReplaceNode(baseType, SyntaxFactory.SimpleBaseType(INotifyPropertyChangedType));
}
else
{
editor.AddInterfaceType(classDeclaration, INotifyPropertyChangedType);
}
}
if (!type.TryFindEventRecursive("PropertyChanged", out _))
{
editor.AddEvent(
classDeclaration,
(EventFieldDeclarationSyntax)editor.Generator.EventDeclaration(
"PropertyChanged",
PropertyChangedEventHandlerType,
Accessibility.Public));
}
if (!type.TryFindFirstMethodRecursive(
"OnPropertyChanged",
m => m.Parameters.Length == 1 &&
m.Parameters[0]
.Type == KnownSymbol.String,
out _))
{
if (type.IsSealed)
{
editor.AddMethod(
classDeclaration,
ParseMethod(
@"private void OnPropertyChanged([System.Runtime.CompilerServices.CallerMemberName] string propertyName = null)
{
this.PropertyChanged?.Invoke(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
}",
underscoreFields));
}
else
{
editor.AddMethod(
classDeclaration,
ParseMethod(
@"protected virtual void OnPropertyChanged([System.Runtime.CompilerServices.CallerMemberName] string propertyName = null)
{
this.PropertyChanged?.Invoke(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
}",
underscoreFields));
}
}
}