public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out ObjectCreationExpressionSyntax objectCreationExpression))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.UseEventArgsEmpty:
{
CodeAction codeAction = CodeAction.Create(
"Use EventArgs.Empty",
cancellationToken => UseEventArgsEmptyRefactoring.RefactorAsync(context.Document, objectCreationExpression, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
public override void Initialize(AnalysisContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
base.Initialize(context);
context.RegisterCompilationStartAction(startContext =>
{
INamedTypeSymbol eventArgsSymbol = startContext.Compilation.GetTypeByMetadataName(MetadataNames.System_EventArgs);
if (eventArgsSymbol != null)
{
startContext.RegisterSyntaxNodeAction(
nodeContext => UseEventArgsEmptyRefactoring.AnalyzeObjectCreationExpression(nodeContext, eventArgsSymbol),
SyntaxKind.ObjectCreationExpression);
}
});
}
