public static async Task <SyntaxTreeIdentifierInfo> GetIdentifierInfoAsync(Document document, CancellationToken cancellationToken)
{
SyntaxTreeIdentifierInfo info;
if (identifierSnapshotCache.TryGetValue(document, out info))
{
return(info);
}
info = await SyntaxTreeIdentifierInfo.LoadAsync(document, cancellationToken).ConfigureAwait(false);
if (info != null)
{
return(identifierSnapshotCache.GetValue(document, _ => info));
}
// alright, we don't have cached information, re-calcuate them here.
var data = await CreateInfoAsync(document, cancellationToken).ConfigureAwait(false);
// okay, persist this info.
await data.Item1.SaveAsync(document, cancellationToken).ConfigureAwait(false);
await data.Item2.SaveAsync(document, cancellationToken).ConfigureAwait(false);
info = data.Item1;
return(identifierSnapshotCache.GetValue(document, _ => info));
}
private static async Task PrecalculateBasicInfoAsync(Document document, CancellationToken cancellationToken)
{
// we already have information. move on
if (await SyntaxTreeIdentifierInfo.PrecalculatedAsync(document, cancellationToken).ConfigureAwait(false) &&
await SyntaxTreeContextInfo.PrecalculatedAsync(document, cancellationToken).ConfigureAwait(false))
{
return;
}
var data = await CreateInfoAsync(document, cancellationToken).ConfigureAwait(false);
await data.Item1.SaveAsync(document, cancellationToken).ConfigureAwait(false);
await data.Item2.SaveAsync(document, cancellationToken).ConfigureAwait(false);
}
private static async Task PrecalculateAdvancedInfoAsync(Document document, CancellationToken cancellationToken)
{
// we do not support precalculating opened file.
if (document.IsOpen())
{
return;
}
// we already have information. move on
if (await SyntaxTreeIdentifierInfo.IdentifierSetPrecalculatedAsync(document, cancellationToken).ConfigureAwait(false))
{
return;
}
await SyntaxTreeIdentifierInfo.SaveIdentifierSetAsync(document, cancellationToken).ConfigureAwait(false);
}
private static IList <SyntaxToken> GetTokensFromText(
ISyntaxFactsService syntaxFacts, Document document, VersionStamp version, SyntaxNode root,
SourceText content, string text, Func <SyntaxToken, bool> candidate, CancellationToken cancellationToken)
{
if (text.Length > 0)
{
using (var positions = SharedPools.BigDefault <List <int> >().GetPooledObject())
{
if (SyntaxTreeIdentifierInfo.TryGetIdentifierLocations(document, version, text, positions.Object, cancellationToken))
{
return(GetTokensFromText(root, positions.Object, text, candidate, cancellationToken).ToList());
}
}
return(GetTokensFromText(syntaxFacts, root, content, text, candidate, cancellationToken).ToList());
}
return(SpecializedCollections.EmptyList <SyntaxToken>());
}