public Task <Hover> Handle(HoverParams request, CancellationToken cancellationToken)
{
try
{
var scriptFile = _projectManager.GetScriptForFilePath(request.TextDocument.Uri.ToFilePath());
if (scriptFile == null)
{
return(Task.FromResult <Hover>(null));
}
var identifier = scriptFile.Node.GetDescendantNodeOfTypeAtPosition <IdentifierNode>(request.Position.ToPosition());
if (identifier == null)
{
return(Task.FromResult <Hover>(null));
}
var symbol = identifier.GetDeclaredOrReferencedSymbol();
if (symbol == null)
{
return(Task.FromResult <Hover>(null));
}
var displayText = new DisplayTextEmitter().GetDisplayText(symbol);
return(Task.FromResult(new Hover()
{
Contents = new MarkedStringsOrMarkupContent(DisplayTextToMarkupContent(displayText)),
Range = identifier.Range.ToRange()
}));
}
catch (Exception e)
{
_logger.LogWarning(e, "Error while handling request.");
}
return(Task.FromResult <Hover>(null));
}
public Task <SignatureHelp> Handle(SignatureHelpParams request, CancellationToken cancellationToken)
{
try
{
var scriptFile = _projectManager.GetScriptForFilePath(request.TextDocument.Uri.ToFilePath());
if (scriptFile == null)
{
return(Task.FromResult <SignatureHelp>(null));
}
var requestPosition = request.Position.ToPosition();
var functionCallExpression = scriptFile.Node.GetDescendantNodeOfTypeAtPosition <FunctionCallExpressionNode>(requestPosition);
if (functionCallExpression == null)
{
return(Task.FromResult <SignatureHelp>(null));
}
var functionSymbol = functionCallExpression.Identifier.GetDeclaredOrReferencedSymbol();
if (functionSymbol == null)
{
return(Task.FromResult <SignatureHelp>(null));
}
var activeParameterIndex = functionCallExpression.GetFunctionParameterIndexAtPosition(requestPosition);
var displayTextEmitter = new DisplayTextEmitter();
var displayText = functionSymbol is FunctionSymbol asFunctionSymbol?
displayTextEmitter.GetDisplayTextForFunction(asFunctionSymbol) :
functionSymbol is EventSymbol asEventSymbol?
displayTextEmitter.GetDisplayTextForEvent(asEventSymbol) : null;
if (displayText == null)
{
return(Task.FromResult <SignatureHelp>(null));
}
return(Task.FromResult(new SignatureHelp()
{
ActiveParameter = activeParameterIndex,
Signatures = new SignatureInformation[]
{
new SignatureInformation()
{
Documentation = displayText.Documentation,
Label = $"{displayText.ShortNamePrefix}({displayText.Parameters.Select(p => p.Text).Join(", ")})",
Parameters = displayText.Parameters.Select(p => new ParameterInformation()
{
Label = p.Text
}).ToArray()
}
}
}));
}
catch (Exception e)
{
_logger.LogWarning(e, "Error while handling request.");
}
return(Task.FromResult <SignatureHelp>(null));
}
