private async Task <List <CodeFixCollection> > AppendFixesOrSuppressionsAsync(
Document document,
TextSpan span,
IEnumerable <DiagnosticData> diagnosticsWithSameSpan,
List <CodeFixCollection> result,
object fixer,
Func <Diagnostic, bool> hasFix,
Func <ImmutableArray <Diagnostic>, Task <IEnumerable <CodeFix> > > getFixes,
CancellationToken cancellationToken)
{
var diagnostics = (await diagnosticsWithSameSpan.OrderByDescending(d => d.Severity).ToDiagnosticsAsync(document.Project, cancellationToken).ConfigureAwait(false)).Where(d => hasFix(d)).ToImmutableArray();
if (diagnostics.Length <= 0)
{
// this can happen for suppression case where all diagnostics can't be suppressed
return(result);
}
var extensionManager = document.Project.Solution.Workspace.Services.GetService <IExtensionManager>();
var fixes = await extensionManager.PerformFunctionAsync(fixer, () => getFixes(diagnostics), defaultValue : SpecializedCollections.EmptyEnumerable <CodeFix>()).ConfigureAwait(false);
if (fixes != null && fixes.Any())
{
// If the fix provider supports fix all occurrences, then get the corresponding FixAllProviderInfo and fix all context.
var fixAllProviderInfo = extensionManager.PerformFunction(fixer, () => ImmutableInterlocked.GetOrAdd(ref _fixAllProviderMap, fixer, FixAllProviderInfo.Create), defaultValue: null);
FixAllProvider fixAllProvider = null;
FixAllContext fixAllContext = null;
IEnumerable <FixAllScope> supportedScopes = null;
if (fixAllProviderInfo != null)
{
var codeFixProvider = (fixer as CodeFixProvider) ?? new WrapperCodeFixProvider((ISuppressionFixProvider)fixer, diagnostics.Select(d => d.Id));
fixAllProvider = fixAllProviderInfo.FixAllProvider;
fixAllContext = FixAllContext.Create(
document, fixAllProviderInfo, codeFixProvider, diagnostics,
this.GetDocumentDiagnosticsAsync, this.GetProjectDiagnosticsAsync, cancellationToken);
supportedScopes = fixAllProviderInfo.SupportedScopes;
}
result = result ?? new List <CodeFixCollection>();
var codeFix = new CodeFixCollection(
fixer, span, fixes, fixAllProvider, fixAllContext,
supportedScopes, diagnostics.First());
result.Add(codeFix);
}
return(result);
}