SignatureHelpSession(SignatureHelpService signatureHelpService, Lazy <ISignatureHelpBroker> signatureHelpBroker, ITextView textView)
{
this.signatureHelpBroker = signatureHelpBroker;
this.textView = textView;
signatures = new List <Signature>();
this.signatureHelpService = signatureHelpService;
}
SignatureHelpInfo(SignatureHelpService signatureHelpService, Document document, SourceText sourceText, ITextSnapshot snapshot)
{
SignatureHelpService = signatureHelpService;
Document = document;
SourceText = sourceText;
Snapshot = snapshot;
}
public async Task <SignatureHelpResult> GetSignatureHelp(WorkspaceRequest request, Budget budget)
{
budget ??= new TimeBudget(TimeSpan.FromSeconds(defaultBudgetInSeconds));
var package = await _packageFinder.Find <ICreateWorkspace>(request.Workspace.WorkspaceType);
var workspace = await request.Workspace.InlineBuffersAsync();
var sourceFiles = workspace.GetSourceFiles();
var(compilation, project) = await package.GetCompilationForLanguageServices(sourceFiles, GetSourceCodeKind(request), GetUsings(request.Workspace), budget);
var documents = project.Documents.ToList();
var selectedDocument = documents.FirstOrDefault(doc => doc.IsMatch(request.ActiveBufferId.FileName))
??
(documents.Count == 1 ? documents.Single() : null);
if (selectedDocument == null)
{
return(new SignatureHelpResult(requestId: request.RequestId));
}
var diagnostics = await DiagnosticsExtractor.ExtractSerializableDiagnosticsFromDocument(request.ActiveBufferId, budget, selectedDocument, workspace);
var tree = await selectedDocument.GetSyntaxTreeAsync();
var absolutePosition = workspace.GetAbsolutePositionForGetBufferWithSpecifiedIdOrSingleBufferIfThereIsOnlyOne(request.ActiveBufferId);
var syntaxNode = tree.GetRoot().FindToken(absolutePosition).Parent;
var result = await SignatureHelpService.GetSignatureHelp(
() => Task.FromResult(compilation.GetSemanticModel(tree)),
syntaxNode,
absolutePosition);
result.RequestId = request.RequestId;
if (diagnostics?.Count > 0)
{
result.Diagnostics = diagnostics;
}
return(result);
}
private async Task <SignatureHelp> GetSignatureHelp(string source)
{
var lineColumn = TestHelpers.GetLineAndColumnFromDollar(source);
source = source.Replace("$", string.Empty);
var request = new SignatureHelpRequest()
{
FileName = "dummy.cs",
Line = lineColumn.Line,
Column = lineColumn.Column,
Buffer = source
};
var workspace = await TestHelpers.CreateSimpleWorkspace(source);
var controller = new SignatureHelpService(workspace);
return(await controller.Handle(request));
}
public static SignatureHelpInfo?Create(ITextSnapshot snapshot)
{
if (snapshot == null)
{
throw new ArgumentNullException(nameof(snapshot));
}
var sourceText = snapshot.AsText();
var document = sourceText.GetOpenDocumentInCurrentContextWithChanges();
if (document == null)
{
return(null);
}
var signatureHelpService = SignatureHelpService.GetService(document);
if (signatureHelpService == null)
{
return(null);
}
return(new SignatureHelpInfo(signatureHelpService, document, sourceText, snapshot));
}
private async Task<SignatureHelp> GetSignatureHelp(string source)
{
var lineColumn = TestHelpers.GetLineAndColumnFromDollar(source);
source = source.Replace("$", string.Empty);
var request = new SignatureHelpRequest()
{
FileName = "dummy.cs",
Line = lineColumn.Line,
Column = lineColumn.Column,
Buffer = source
};
var workspace = await TestHelpers.CreateSimpleWorkspace(source);
var controller = new SignatureHelpService(workspace);
return await controller.Handle(request);
}
