public async Task <ExtractMethodResult> ExtractMethodAsync(
Document document,
TextSpan textSpan,
bool localFunction,
ExtractMethodOptions options,
CancellationToken cancellationToken)
{
var semanticDocument = await SemanticDocument.CreateAsync(document, cancellationToken).ConfigureAwait(false);
var validator = CreateSelectionValidator(semanticDocument, textSpan, localFunction, options);
var selectionResult = await validator.GetValidSelectionAsync(cancellationToken).ConfigureAwait(false);
if (!selectionResult.ContainsValidContext)
{
return(new FailedExtractMethodResult(selectionResult.Status));
}
cancellationToken.ThrowIfCancellationRequested();
// extract method
var extractor = CreateMethodExtractor((TResult)selectionResult, localFunction);
return(await extractor.ExtractMethodAsync(cancellationToken).ConfigureAwait(false));
}
private bool Execute(
ITextBuffer textBuffer,
ITextView view,
IUIThreadOperationContext waitContext)
{
var cancellationToken = waitContext.UserCancellationToken;
var spans = view.Selection.GetSnapshotSpansOnBuffer(textBuffer);
if (spans.Count(s => s.Length > 0) != 1)
{
return(false);
}
var document = textBuffer.CurrentSnapshot.GetFullyLoadedOpenDocumentInCurrentContextWithChanges(
waitContext, _threadingContext);
if (document == null)
{
return(false);
}
var options = ExtractMethodOptions.From(document.Project);
var result = ExtractMethodService.ExtractMethodAsync(
document, spans.Single().Span.ToTextSpan(), localFunction: false, options, cancellationToken).WaitAndGetResult(cancellationToken);
Contract.ThrowIfNull(result);
if (!result.Succeeded && !result.SucceededWithSuggestion)
{
// if it failed due to out/ref parameter in async method, try it with different option
var newResult = TryWithoutMakingValueTypesRef(document, spans, result, options, cancellationToken);
if (newResult != null)
{
var notificationService = document.Project.Solution.Workspace.Services.GetService <INotificationService>();
if (notificationService != null)
{
// We are about to show a modal UI dialog so we should take over the command execution
// wait context. That means the command system won't attempt to show its own wait dialog
// and also will take it into consideration when measuring command handling duration.
waitContext.TakeOwnership();
if (!notificationService.ConfirmMessageBox(
EditorFeaturesResources.Extract_method_encountered_the_following_issues + Environment.NewLine + Environment.NewLine +
string.Join(Environment.NewLine, result.Reasons) + Environment.NewLine + Environment.NewLine +
EditorFeaturesResources.We_can_fix_the_error_by_not_making_struct_out_ref_parameter_s_Do_you_want_to_proceed,
title: EditorFeaturesResources.Extract_Method,
severity: NotificationSeverity.Error))
{
// We handled the command, displayed a notification and did not produce code.
return(true);
}
}
// reset result
result = newResult;
}
else if (TryNotifyFailureToUser(document, result, waitContext))
{
// We handled the command, displayed a notification and did not produce code.
return(true);
}
}
// apply the change to buffer
// get method name token
ApplyChangesToBuffer(result, textBuffer, cancellationToken);
// start inline rename
var methodNameAtInvocation = result.InvocationNameToken;
var snapshotAfterFormatting = textBuffer.CurrentSnapshot;
var documentAfterFormatting = snapshotAfterFormatting.GetOpenDocumentInCurrentContextWithChanges();
_renameService.StartInlineSession(documentAfterFormatting, methodNameAtInvocation.Span, cancellationToken);
// select invocation span
view.TryMoveCaretToAndEnsureVisible(new SnapshotPoint(snapshotAfterFormatting, methodNameAtInvocation.Span.End));
view.SetSelection(
methodNameAtInvocation.Span.ToSnapshotSpan(snapshotAfterFormatting));
return(true);
}
private static ExtractMethodResult TryWithoutMakingValueTypesRef(
Document document, NormalizedSnapshotSpanCollection spans, ExtractMethodResult result, ExtractMethodOptions options, CancellationToken cancellationToken)
{
if (options.DontPutOutOrRefOnStruct || !result.Reasons.IsSingle())
{
return(null);
}
var reason = result.Reasons.FirstOrDefault();
var length = FeaturesResources.Asynchronous_method_cannot_have_ref_out_parameters_colon_bracket_0_bracket.IndexOf(':');
if (reason != null && length > 0 && reason.IndexOf(FeaturesResources.Asynchronous_method_cannot_have_ref_out_parameters_colon_bracket_0_bracket.Substring(0, length), 0, length, StringComparison.Ordinal) >= 0)
{
var newResult = ExtractMethodService.ExtractMethodAsync(
document,
spans.Single().Span.ToTextSpan(),
localFunction: false,
options with {
DontPutOutOrRefOnStruct = true
},
public static Task <ExtractMethodResult> ExtractMethodAsync(Document document, TextSpan textSpan, bool localFunction, ExtractMethodOptions options, CancellationToken cancellationToken) => document.GetRequiredLanguageService <IExtractMethodService>().ExtractMethodAsync(document, textSpan, localFunction, options, cancellationToken);