private async Task <Location> RelocateSymbol_NoLock(MetadataAsSourceGeneratedFileInfo fileInfo, SymbolKey symbolId, CancellationToken cancellationToken)
{
// We need to relocate the symbol in the already existing file. If the file is open, we can just
// reuse that workspace. Otherwise, we have to go spin up a temporary project to do the binding.
if (_openedDocumentIds.TryGetValue(fileInfo, out var openDocumentId))
{
// Awesome, it's already open. Let's try to grab a document for it
var document = _workspace.CurrentSolution.GetDocument(openDocumentId);
return(await MetadataAsSourceHelpers.GetLocationInGeneratedSourceAsync(symbolId, document, cancellationToken).ConfigureAwait(false));
}
// Annoying case: the file is still on disk. Only real option here is to spin up a fake project to go and bind in.
var temporaryProjectInfoAndDocumentId = fileInfo.GetProjectInfoAndDocumentId(_workspace, loadFileFromDisk: true);
var temporaryDocument = _workspace.CurrentSolution.AddProject(temporaryProjectInfoAndDocumentId.Item1)
.GetDocument(temporaryProjectInfoAndDocumentId.Item2);
return(await MetadataAsSourceHelpers.GetLocationInGeneratedSourceAsync(symbolId, temporaryDocument, cancellationToken).ConfigureAwait(false));
}
public async Task <MetadataAsSourceFile> GetGeneratedFileAsync(Project project, ISymbol symbol, bool allowDecompilation, CancellationToken cancellationToken = default)
{
if (project == null)
{
throw new ArgumentNullException(nameof(project));
}
if (symbol == null)
{
throw new ArgumentNullException(nameof(symbol));
}
if (symbol.Kind == SymbolKind.Namespace)
{
throw new ArgumentException(EditorFeaturesResources.symbol_cannot_be_a_namespace, nameof(symbol));
}
symbol = symbol.GetOriginalUnreducedDefinition();
MetadataAsSourceGeneratedFileInfo fileInfo;
Location navigateLocation = null;
var topLevelNamedType = MetadataAsSourceHelpers.GetTopLevelContainingNamedType(symbol);
var symbolId = SymbolKey.Create(symbol, cancellationToken);
using (await _gate.DisposableWaitAsync(cancellationToken).ConfigureAwait(false))
{
InitializeWorkspace(project);
var infoKey = await GetUniqueDocumentKey(project, topLevelNamedType, cancellationToken).ConfigureAwait(false);
fileInfo = _keyToInformation.GetOrAdd(infoKey, _ => new MetadataAsSourceGeneratedFileInfo(GetRootPathWithGuid_NoLock(), project, topLevelNamedType));
_generatedFilenameToInformation[fileInfo.TemporaryFilePath] = fileInfo;
if (!File.Exists(fileInfo.TemporaryFilePath))
{
// We need to generate this. First, we'll need a temporary project to do the generation into. We
// avoid loading the actual file from disk since it doesn't exist yet.
var temporaryProjectInfoAndDocumentId = fileInfo.GetProjectInfoAndDocumentId(_workspace, loadFileFromDisk: false);
var temporaryDocument = _workspace.CurrentSolution.AddProject(temporaryProjectInfoAndDocumentId.Item1)
.GetDocument(temporaryProjectInfoAndDocumentId.Item2);
var useDecompiler = allowDecompilation;
if (useDecompiler)
{
try
{
temporaryDocument = await DecompileSymbolAsync(temporaryDocument, symbol, cancellationToken).ConfigureAwait(false);
}
catch (Exception e) when(FatalError.ReportWithoutCrashUnlessCanceled(e))
{
useDecompiler = false;
}
}
if (!useDecompiler)
{
var sourceFromMetadataService = temporaryDocument.Project.LanguageServices.GetService <IMetadataAsSourceService>();
temporaryDocument = await sourceFromMetadataService.AddSourceToAsync(temporaryDocument, symbol, cancellationToken).ConfigureAwait(false);
}
// We have the content, so write it out to disk
var text = await temporaryDocument.GetTextAsync(cancellationToken).ConfigureAwait(false);
// Create the directory. It's possible a parallel deletion is happening in another process, so we may have
// to retry this a few times.
var directoryToCreate = Path.GetDirectoryName(fileInfo.TemporaryFilePath);
while (!Directory.Exists(directoryToCreate))
{
try
{
Directory.CreateDirectory(directoryToCreate);
}
catch (DirectoryNotFoundException)
{
}
catch (UnauthorizedAccessException)
{
}
}
using (var textWriter = new StreamWriter(fileInfo.TemporaryFilePath, append: false, encoding: fileInfo.Encoding))
{
text.Write(textWriter);
}
// Mark read-only
new FileInfo(fileInfo.TemporaryFilePath).IsReadOnly = true;
// Locate the target in the thing we just created
navigateLocation = await MetadataAsSourceHelpers.GetLocationInGeneratedSourceAsync(symbolId, temporaryDocument, cancellationToken).ConfigureAwait(false);
}
// If we don't have a location yet, then that means we're re-using an existing file. In this case, we'll want to relocate the symbol.
if (navigateLocation == null)
{
navigateLocation = await RelocateSymbol_NoLock(fileInfo, symbolId, cancellationToken).ConfigureAwait(false);
}
}
var documentName = string.Format(
"{0} [{1}]",
topLevelNamedType.Name,
EditorFeaturesResources.from_metadata);
var documentTooltip = topLevelNamedType.ToDisplayString(new SymbolDisplayFormat(typeQualificationStyle: SymbolDisplayTypeQualificationStyle.NameAndContainingTypesAndNamespaces));
return(new MetadataAsSourceFile(fileInfo.TemporaryFilePath, navigateLocation, documentName, documentTooltip));
}
public static Task <Location> GetLocationInGeneratedSourceAsync(ISymbol symbol, Document generatedDocument, CancellationToken cancellationToken)
{
var symbolKey = SymbolKey.Create(symbol, cancellationToken);
return(MetadataAsSourceHelpers.GetLocationInGeneratedSourceAsync(symbolKey, generatedDocument, cancellationToken));
}