public override async Task <Hover> Hover(TextDocumentPositionParams @params)
{
await _analyzerCreationTask;
await IfTestWaitForAnalysisCompleteAsync();
var uri = @params.textDocument.uri;
_projectFiles.GetAnalysis(@params.textDocument, @params.position, @params._version, out var entry, out var tree);
TraceMessage($"Hover in {uri} at {@params.position}");
var analysis = entry?.Analysis;
if (analysis == null)
{
TraceMessage($"No analysis found for {uri}");
return(EmptyHover);
}
tree = GetParseTree(entry, uri, CancellationToken, out var version) ?? tree;
var index = tree.LocationToIndex(@params.position);
var w = new ImportedModuleNameWalker(entry.ModuleName, index);
tree.Walk(w);
if (!string.IsNullOrEmpty(w.ImportedName) &&
_analyzer.Modules.TryImport(w.ImportedName, out var modRef))
{
var doc = _displayTextBuilder.GetModuleDocumentation(modRef);
return(new Hover {
contents = doc
});
}
Expression expr;
SourceSpan?exprSpan;
Analyzer.InterpreterScope scope = null;
var finder = new ExpressionFinder(tree, GetExpressionOptions.Hover);
expr = finder.GetExpression(@params.position) as Expression;
exprSpan = expr?.GetSpan(tree);
if (expr == null)
{
TraceMessage($"No hover info found in {uri} at {@params.position}");
return(EmptyHover);
}
TraceMessage($"Getting hover for {expr.ToCodeString(tree, CodeFormattingOptions.Traditional)}");
var values = analysis.GetValues(expr, @params.position, scope).ToList();
string originalExpr;
if (expr is ConstantExpression || expr is ErrorExpression)
{
originalExpr = null;
}
else
{
originalExpr = @params._expr?.Trim();
if (string.IsNullOrEmpty(originalExpr))
{
originalExpr = expr.ToCodeString(tree, CodeFormattingOptions.Traditional);
}
}
var names = values.Select(GetFullTypeName).Where(n => !string.IsNullOrEmpty(n)).Distinct().ToArray();
var res = new Hover {
contents = GetMarkupContent(
_displayTextBuilder.GetDocumentation(values, originalExpr),
_clientCaps.textDocument?.hover?.contentFormat),
range = exprSpan,
_version = version,
_typeNames = names
};
return(res);
}
internal Task <Hover> Hover(TextDocumentPositionParams @params, CancellationToken cancellationToken)
{
var uri = @params.textDocument.uri;
ProjectFiles.GetAnalysis(@params.textDocument, @params.position, @params._version, out var entry, out var tree);
TraceMessage($"Hover in {uri} at {@params.position}");
var analysis = entry?.Analysis;
if (analysis == null)
{
TraceMessage($"No analysis found for {uri}");
return(Task.FromResult(EmptyHover));
}
tree = GetParseTree(entry, uri, cancellationToken, out var version) ?? tree;
Expression expr;
SourceSpan?exprSpan;
Analyzer.InterpreterScope scope = null;
var finder = new ExpressionFinder(tree, GetExpressionOptions.Hover);
expr = finder.GetExpression(@params.position) as Expression;
exprSpan = expr?.GetSpan(tree);
if (expr == null)
{
TraceMessage($"No hover info found in {uri} at {@params.position}");
return(Task.FromResult(EmptyHover));
}
TraceMessage($"Getting hover for {expr.ToCodeString(tree, CodeFormattingOptions.Traditional)}");
// First try values from expression. This works for the import statement most of the time.
var values = analysis.GetValues(expr, @params.position, scope).ToList();
if (values.Count == 0)
{
// See if this is hover over import statement
var index = tree.LocationToIndex(@params.position);
var w = new ImportedModuleNameWalker(entry, index, tree);
tree.Walk(w);
if (w.ImportedType != null)
{
values = analysis.GetValues(w.ImportedType.Name, @params.position).ToList();
}
else
{
var sb = new StringBuilder();
var span = SourceSpan.Invalid;
foreach (var n in w.ImportedModules)
{
if (Analyzer.Modules.TryGetImportedModule(n.Name, out var modRef) && modRef.AnalysisModule != null)
{
if (sb.Length > 0)
{
sb.AppendLine();
sb.AppendLine();
}
sb.Append(_displayTextBuilder.GetModuleDocumentation(modRef));
span = span.IsValid ? span.Union(n.SourceSpan) : n.SourceSpan;
}
}
if (sb.Length > 0)
{
return(Task.FromResult(new Hover {
contents = sb.ToString(),
range = span
}));
}
}
}
if (values.Count > 0)
{
string originalExpr;
if (expr is ConstantExpression || expr is ErrorExpression)
{
originalExpr = null;
}
else
{
originalExpr = @params._expr?.Trim();
if (string.IsNullOrEmpty(originalExpr))
{
originalExpr = expr.ToCodeString(tree, CodeFormattingOptions.Traditional);
}
}
var names = values.Select(GetFullTypeName).Where(n => !string.IsNullOrEmpty(n)).Distinct().ToArray();
var res = new Hover {
contents = GetMarkupContent(
_displayTextBuilder.GetDocumentation(values, originalExpr),
_clientCaps.textDocument?.hover?.contentFormat),
range = exprSpan,
_version = version?.Version,
_typeNames = names
};
return(Task.FromResult(res));
}
return(Task.FromResult(EmptyHover));
}