public (List <RhetosSignature> signatures, int?activeSignature, int?activeParameter) GetSignatureHelpAtPosition(LineChr lineChr)
{
var analysis = GetAnalysis(lineChr);
if (analysis.KeywordToken == null || analysis.IsAfterAnyErrorLine(lineChr))
{
return(null, null, null);
}
var signaturesWithDocumentation = conceptQueries.GetSignaturesWithDocumentation(analysis.KeywordToken.Value);
var validConcepts = analysis.GetValidConceptsWithActiveParameter();
if (!validConcepts.Any())
{
return(signaturesWithDocumentation, null, null);
}
var sortedConcepts = validConcepts
.Select(valid =>
(
valid.conceptType,
valid.activeParamater,
parameterCount: ConceptInfoType.GetParameters(valid.conceptType).Count,
documentation: signaturesWithDocumentation.Single(sig => sig.ConceptInfoType == valid.conceptType)
))
.OrderBy(valid => valid.activeParamater >= valid.parameterCount)
.ThenBy(valid => valid.parameterCount)
.ThenBy(valid => valid.conceptType.Name)
.ToList();
var activeParameter = sortedConcepts.First().activeParamater;
return(sortedConcepts.Select(sorted => sorted.documentation).ToList(), 0, activeParameter);
}
private RhetosSignature CreateRhetosSignature(Type conceptInfoType)
{
var prefix = " ";
var signature = ConceptInfoType.SignatureDescription(conceptInfoType);
var documentation = $"{prefix}* defined by {conceptInfoType.FullName}";
var xmlDocumentation = xmlDocumentationProvider.GetDocumentation(conceptInfoType, prefix);
if (!string.IsNullOrEmpty(xmlDocumentation))
{
documentation = $"{xmlDocumentation}\n{documentation}";
}
return(new RhetosSignature()
{
ConceptInfoType = conceptInfoType,
Parameters = ConceptInfoType.GetParameters(conceptInfoType),
Signature = signature,
Documentation = documentation
});
}
private int GetActiveParameterForValidConcept(Type conceptType)
{
var activeParameter = 0;
// we have parsed some members successfully for this concept type
if (LastTokenParsed.ContainsKey(conceptType))
{
activeParameter = ConceptInfoType.IndexOfParameter(conceptType, LastMemberReadAttempt[conceptType]);
// if we have just typed a keyword OR have stopped typing a parameter (by pressing space, etc.), we need to advance to next parameter
// keyword scenario is possible in nested concepts, where we already have valid parameters and are just typing a keyword
var lineChr = new LineChr(Line, Chr);
var atLastParsed = GetTokenAtPosition(lineChr) == LastTokenParsed[conceptType] || GetTokenLeftOfPosition(lineChr) == LastTokenParsed[conceptType];
var atKeyword = string.Equals(ConceptInfoHelper.GetKeyword(conceptType), LastTokenParsed[conceptType].Value, StringComparison.InvariantCultureIgnoreCase);
if (atKeyword || !atLastParsed)
{
activeParameter++;
}
}
return(activeParameter);
}
public override Task <SignatureHelp> Handle(SignatureHelpParams request, CancellationToken cancellationToken)
{
log.LogDebug($"SignatureHelp requested at {request.Position.ToLineChr()}.");
var rhetosDocument = rhetosWorkspace.GetRhetosDocument(request.TextDocument.Uri);
if (rhetosDocument == null)
{
return(Task.FromResult <SignatureHelp>(null));
}
var signatures = rhetosDocument.GetSignatureHelpAtPosition(request.Position.ToLineChr());
if (signatures.signatures == null)
{
return(Task.FromResult <SignatureHelp>(null));
}
ParameterInformation FromRhetosParameter(ConceptMember conceptMember) => new ParameterInformation()
{
Documentation = "",
Label = new ParameterInformationLabel(ConceptInfoType.ConceptMemberDescription(conceptMember))
};
SignatureInformation FromRhetosSignature(RhetosSignature rhetosSignature) => new SignatureInformation()
{
Documentation = rhetosSignature.Documentation,
Label = rhetosSignature.Signature,
Parameters = new Container <ParameterInformation>(rhetosSignature.Parameters.Select(FromRhetosParameter))
};
var signatureHelp = new SignatureHelp()
{
Signatures = new Container <SignatureInformation>(signatures.signatures.Select(FromRhetosSignature)),
ActiveSignature = signatures.activeSignature ?? 100,
ActiveParameter = signatures.activeParameter ?? 100
};
return(Task.FromResult(signatureHelp));
}
public void SignatureDescriptions(Type conceptInfoType, string expectedDescription)
{
var description = ConceptInfoType.SignatureDescription(conceptInfoType);
Assert.AreEqual(expectedDescription, description);
}