public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var document = context.Document;
if (document.Project.Solution.Workspace.Kind == WorkspaceKind.MiscellaneousFiles)
{
return;
}
var span = context.Span;
if (!span.IsEmpty)
{
return;
}
var cancellationToken = context.CancellationToken;
if (cancellationToken.IsCancellationRequested)
{
return;
}
var model = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
if (model.IsFromGeneratedCode(cancellationToken))
{
return;
}
var root = await model.SyntaxTree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var token = root.FindToken(span.Start);
if (!token.IsKind(SyntaxKind.IdentifierToken))
{
return;
}
var node = token.Parent as VariableDeclaratorSyntax;
if (node == null)
{
return;
}
var declaredSymbol = model.GetDeclaredSymbol(node, cancellationToken);
if (declaredSymbol == null || !declaredSymbol.IsKind(SymbolKind.Event))
{
return;
}
if (declaredSymbol.ContainingSymbol.IsInterfaceType())
{
return;
}
var invokeMethod = declaredSymbol.GetReturnType().GetDelegateInvokeMethod();
if (invokeMethod == null)
{
return;
}
context.RegisterRefactoring(
CodeActionFactory.CreateInsertion(
span,
DiagnosticSeverity.Info,
GettextCatalog.GetString("Create event invocator"),
t2 =>
{
SyntaxNode eventInvocator = CreateEventInvocator(document, declaredSymbol);
return(Task.FromResult(new InsertionResult(context, eventInvocator, declaredSymbol.ContainingType, declaredSymbol.Locations.First())));
}
)
);
}
