internal static async Task <IEnumerable <Alias> > GetAliasFromMetadataAsync(
OmniSharpWorkspace workspace,
string fileName,
int line,
int timeout,
MetadataExternalSourceService metadataExternalSourceService)
{
var document = workspace.GetDocument(fileName);
var lineIndex = line + MethodLineOffset;
int column;
if (document == null)
{
return(Enumerable.Empty <Alias>());
}
var semanticModel = await document.GetSemanticModelAsync();
var sourceText = await document.GetTextAsync();
var sourceLine = sourceText.Lines[lineIndex].ToString();
if (sourceLine.Contains("(Context"))
{
column = sourceLine.IndexOf("(Context", StringComparison.Ordinal);
}
else
{
lineIndex = line + PropertyLineOffset;
sourceLine = sourceText.Lines[lineIndex].ToString();
if (sourceLine.Contains("(Context"))
{
column = sourceLine.IndexOf("(Context", StringComparison.Ordinal);
}
else
{
return(Enumerable.Empty <Alias>());
}
}
if (column > 0 && sourceLine[column - 1] == '>')
{
column = sourceLine.LastIndexOf("<", column, StringComparison.Ordinal);
}
var position = sourceText.Lines.GetPosition(new LinePosition(lineIndex, column));
var symbol = await SymbolFinder.FindSymbolAtPositionAsync(semanticModel, position, workspace);
if (symbol == null || symbol is INamespaceSymbol)
{
return(Enumerable.Empty <Alias>());
}
if (symbol is IMethodSymbol method)
{
symbol = method.PartialImplementationPart ?? symbol;
}
var result = new List <Alias>();
foreach (var location in symbol.Locations)
{
if (!location.IsInMetadata)
{
continue;
}
var cancellationSource = new CancellationTokenSource(TimeSpan.FromMilliseconds(timeout));
var(metadataDocument, _) = await metadataExternalSourceService.GetAndAddExternalSymbolDocument(document.Project, symbol, cancellationSource.Token);
if (metadataDocument == null)
{
continue;
}
cancellationSource = new CancellationTokenSource(TimeSpan.FromMilliseconds(timeout));
var metadataLocation = await metadataExternalSourceService.GetExternalSymbolLocation(symbol, metadataDocument, cancellationSource.Token);
var lineSpan = metadataLocation.GetMappedLineSpan();
result.Add(new Alias
{
Document = document,
MetadataDocument = metadataDocument,
Symbol = symbol,
Location = location,
LineSpan = lineSpan
});
}
return(result);
}
private async Task <GotoDefinitionResponse> GetAliasFromMetadataAsync(GotoDefinitionRequest request)
{
var document = Workspace.GetDocument(request.FileName);
var response = new GotoDefinitionResponse();
var lineIndex = request.Line + MethodLineOffset;
var column = 0;
if (document == null)
{
return(response);
}
var semanticModel = await document.GetSemanticModelAsync();
var sourceText = await document.GetTextAsync();
var sourceLine = sourceText.Lines[lineIndex].ToString();
if (sourceLine.Contains("(Context"))
{
column = sourceLine.IndexOf("(Context", StringComparison.Ordinal);
}
else
{
lineIndex = request.Line + PropertyLineOffset;
sourceLine = sourceText.Lines[lineIndex].ToString();
if (sourceLine.Contains("(Context"))
{
column = sourceLine.IndexOf("(Context", StringComparison.Ordinal);
}
else
{
return(response);
}
}
var position = sourceText.Lines.GetPosition(new LinePosition(lineIndex, column));
var symbol = await SymbolFinder.FindSymbolAtPositionAsync(semanticModel, position, Workspace);
if (symbol == null || symbol is INamespaceSymbol)
{
return(response);
}
if (symbol is IMethodSymbol method)
{
symbol = method.PartialImplementationPart ?? symbol;
}
var location = symbol.Locations.First();
if (!location.IsInMetadata)
{
return(response);
}
var cancellationSource = new CancellationTokenSource(TimeSpan.FromMilliseconds(request.Timeout));
var(metadataDocument, _) = await _metadataExternalSourceService.GetAndAddExternalSymbolDocument(document.Project, symbol, cancellationSource.Token);
if (metadataDocument == null)
{
return(response);
}
cancellationSource = new CancellationTokenSource(TimeSpan.FromMilliseconds(request.Timeout));
var metadataLocation = await _metadataExternalSourceService.GetExternalSymbolLocation(symbol, metadataDocument, cancellationSource.Token);
var lineSpan = metadataLocation.GetMappedLineSpan();
response = new GotoDefinitionResponse
{
Line = lineSpan.StartLinePosition.Line,
Column = lineSpan.StartLinePosition.Character,
MetadataSource = new MetadataSource()
{
AssemblyName = symbol.ContainingAssembly.Name,
ProjectName = document.Project.Name,
TypeName = symbol.GetSymbolName()
},
};
return(response);
}