private void FormatTrackingSpan(IBraceCompletionSession session, bool shouldHonorAutoFormattingOnCloseBraceOption)
{
if (!session.SubjectBuffer.GetFeatureOnOffOption(FeatureOnOffOptions.AutoFormattingOnCloseBrace) && shouldHonorAutoFormattingOnCloseBraceOption)
{
return;
}
var snapshot = session.SubjectBuffer.CurrentSnapshot;
var startPoint = session.OpeningPoint.GetPoint(snapshot);
var endPoint = session.ClosingPoint.GetPoint(snapshot);
var startPosition = startPoint.Position;
var endPosition = endPoint.Position;
var document = snapshot.GetOpenDocumentInCurrentContextWithChanges();
var style = document != null
? document.GetOptionsAsync(CancellationToken.None).WaitAndGetResult(CancellationToken.None).GetOption(FormattingOptions.SmartIndent)
: FormattingOptions.SmartIndent.DefaultValue;
if (style == FormattingOptions.IndentStyle.Smart)
{
// skip whitespace
while (startPosition >= 0 && char.IsWhiteSpace(snapshot[startPosition]))
{
startPosition--;
}
// skip token
startPosition--;
while (startPosition >= 0 && !char.IsWhiteSpace(snapshot[startPosition]))
{
startPosition--;
}
}
session.SubjectBuffer.Format(TextSpan.FromBounds(Math.Max(startPosition, 0), endPosition));
}
/// <summary>
/// It is unclear why, but we are sometimes asked to navigate to a <see cref="TextSpan"/>
/// that is not inside the bounds of the associated <see cref="Document"/>. This method
/// returns a span that is guaranteed to be inside the <see cref="Document"/> bounds. If
/// the returned span is different from the given span, then the worst observable behavior
/// is either no navigation or navigation to the end of the document.
/// See https://github.com/dotnet/roslyn/issues/7660 for more details.
/// </summary>
private static TextSpan GetSpanWithinDocumentBounds(TextSpan span, int documentLength)
{
return(TextSpan.FromBounds(GetPositionWithinDocumentBounds(span.Start, documentLength), GetPositionWithinDocumentBounds(span.End, documentLength)));
}
