private async Task<Microsoft.CodeAnalysis.CodeActions.CodeAction> GetActionAsync(SemanticModel semanticModel, SyntaxTree tree, SyntaxToken token)
{
var methodSymbol = GetMethodDefinitionSymbol(semanticModel, token);
if (methodSymbol == null || methodSymbol.Locations.Any(l => l.IsInMetadata))
{
// can't find method definition defined in source
return null;
}
// adding or deleting ref/out on anonymous method/lambda not supported
if (methodSymbol.MethodKind == MethodKind.AnonymousFunction)
{
return null;
}
var argumentAndParameters = await GetArgumentAndParametersAsync(semanticModel, methodSymbol, token).ConfigureAwait(false);
if (argumentAndParameters == null)
{
return null;
}
// currently only support everything in one file
var nodes = (new SyntaxNode[] { argumentAndParameters.Item1 }).Concat(argumentAndParameters.Item2);
if (this.document.Project.GetContainingDocuments(nodes, this.cancellationToken).Count() != 1)
{
return null;
}
if (tree.OnArgumentOrParameterWithoutRefOut(this.position))
{
return AddOutOrRefCodeAction.Applicable(semanticModel, argumentAndParameters.Item1, argumentAndParameters.Item2) ?
new AddOutOrRefCodeAction(this.document, semanticModel, argumentAndParameters.Item1, argumentAndParameters.Item2) : null;
}
else
{
return RemoveOutOrRefCodeAction.Applicable(semanticModel, argumentAndParameters.Item1, argumentAndParameters.Item2) ?
new RemoveOutOrRefCodeAction(this.document, semanticModel, argumentAndParameters.Item1, argumentAndParameters.Item2) : null;
}
}