public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
var document = context.Document;
var cancellationToken = context.CancellationToken;
var syntaxRoot = await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var compilationUnit = (CompilationUnitSyntax)syntaxRoot;
#if CODE_STYLE
var options = document.Project.AnalyzerOptions.GetAnalyzerOptionSet(syntaxRoot.SyntaxTree, cancellationToken);
var simplifierOptions = CSharpSimplifierOptions.Create(options, fallbackOptions: null);
#else
var options = await document.GetOptionsAsync(cancellationToken).ConfigureAwait(false);
var simplifierOptions = await SimplifierOptions.FromDocumentAsync(document, fallbackOptions: context.Options(document.Project.LanguageServices).SimplifierOptions, cancellationToken).ConfigureAwait(false);
#endif
var codeStyleOption = options.GetOption(CSharpCodeStyleOptions.PreferredUsingDirectivePlacement);
// Read the preferred placement option and verify if it can be applied to this code file.
// There are cases where we will not be able to fix the diagnostic and the user will need to resolve
// it manually.
var (placement, preferPreservation) = DeterminePlacement(compilationUnit, codeStyleOption);
if (preferPreservation)
return;
foreach (var diagnostic in context.Diagnostics)
{
context.RegisterCodeFix(
CodeAction.Create(
CSharpAnalyzersResources.Move_misplaced_using_directives,
token => GetTransformedDocumentAsync(document, compilationUnit, GetAllUsingDirectives(compilationUnit), placement, simplifierOptions, token),
nameof(CSharpAnalyzersResources.Move_misplaced_using_directives)),
diagnostic);
}
}