private async Task UpdateForCaretPositionAsync(SnapshotPoint pointInRoslynSnapshot, CancellationToken cancellationToken)
{
try
{
await _asyncListener.Delay(TimeSpan.FromMilliseconds(250), cancellationToken).ConfigureAwait(false);
// If it's not open, don't do anything, since if we are going to show locations in metadata that might
// be expensive. This doesn't cause a functional issue, since opening the window clears whatever was previously there
// so the user won't notice we weren't doing anything when it was open.
if (!await _codeDefinitionWindowService.IsWindowOpenAsync(cancellationToken).ConfigureAwait(false))
{
return;
}
var document = pointInRoslynSnapshot.Snapshot.GetOpenDocumentInCurrentContextWithChanges();
if (document == null)
{
return;
}
// Ensure we're off the UI thread for the rest of this since we don't want to be computing locations on the UI thread.
await TaskScheduler.Default;
var locations = await GetContextFromPointAsync(document, pointInRoslynSnapshot, cancellationToken).ConfigureAwait(true);
await _codeDefinitionWindowService.SetContextAsync(locations, cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
}
catch (Exception ex) when(FatalError.ReportAndCatch(ex))
{
}
}
