private async Task TrackActiveSpansAsync(CancellationToken cancellationToken)
{
try
{
var openDocumentIds = _workspace.GetOpenDocumentIds().ToImmutableArray();
if (openDocumentIds.Length == 0)
{
return;
}
var baseActiveStatementSpans = await _encService.GetBaseActiveStatementSpansAsync(openDocumentIds, cancellationToken).ConfigureAwait(false);
if (baseActiveStatementSpans.IsDefault)
{
// Edit session not in progress.
return;
}
Debug.Assert(openDocumentIds.Length == baseActiveStatementSpans.Length);
var currentSolution = _workspace.CurrentSolution;
lock (_trackingSpans)
{
for (int i = 0; i < baseActiveStatementSpans.Length; i++)
{
var document = currentSolution.GetDocument(openDocumentIds[i]);
if (document == null)
{
// Document has been deleted.
continue;
}
if (!TryGetSnapshot(document, out var snapshot))
{
// Document is not open in an editor or a corresponding snapshot doesn't exist anymore.
continue;
}
if (!_trackingSpans.ContainsKey(document.Id))
{
// Create tracking spans if they have not been created for this open document yet
// (avoids race condition with DocumentOpen event handler).
_trackingSpans.Add(document.Id, CreateTrackingSpans(snapshot, baseActiveStatementSpans[i]));
}
}
}
}
catch (OperationCanceledException)
{
// nop
}
catch (Exception e) when(FatalError.ReportWithoutCrash(e))
{
// nop
}
}