internal Snapshot(
VisualStudioMetadataReferenceManager provider,
MetadataReferenceProperties properties,
string fullPath,
FileChangeTracker fileChangeTrackerOpt
) : base(properties, fullPath)
{
Debug.Assert(Properties.Kind == MetadataImageKind.Assembly);
_provider = provider;
_fileChangeTrackerOpt = fileChangeTrackerOpt;
_timestamp = new Lazy <DateTime>(
() =>
{
try
{
_fileChangeTrackerOpt?.EnsureSubscription();
return(FileUtilities.GetFileTimeStamp(this.FilePath));
}
catch (IOException e)
{
// Reading timestamp of a file might fail.
// Let's remember the failure and report it to the compiler when it asks for metadata.
// We could let the Lazy hold onto this (since it knows how to rethrow exceptions), but
// our support of GetStorages needs to gracefully handle the case where we have no timestamp.
// If Lazy had a "IsValueFaulted" we could be cleaner here.
_error = e;
return(DateTime.MinValue);
}
},
LazyThreadSafetyMode.PublicationOnly
);
}
public VisualStudioAnalyzer(string fullPath, IVsFileChangeEx fileChangeService, HostDiagnosticUpdateSource hostDiagnosticUpdateSource, ProjectId projectId, Workspace workspace, string language)
{
_fullPath = fullPath;
_tracker = new FileChangeTracker(fileChangeService, fullPath);
_tracker.UpdatedOnDisk += OnUpdatedOnDisk;
_tracker.StartFileChangeListeningAsync();
_tracker.EnsureSubscription();
_hostDiagnosticUpdateSource = hostDiagnosticUpdateSource;
_projectId = projectId;
_workspace = workspace;
_language = language;
}
public VisualStudioAnalyzer(string fullPath, IVsFileChangeEx fileChangeService, HostDiagnosticUpdateSource hostDiagnosticUpdateSource, ProjectId projectId, Workspace workspace, string language)
{
_fullPath = fullPath;
_tracker = new FileChangeTracker(fileChangeService, fullPath);
_tracker.UpdatedOnDisk += OnUpdatedOnDisk;
_tracker.StartFileChangeListeningAsync();
_tracker.EnsureSubscription();
_hostDiagnosticUpdateSource = hostDiagnosticUpdateSource;
_projectId = projectId;
_workspace = workspace;
_language = language;
}
public override Task <TextAndVersion> LoadTextAndVersionAsync(Workspace workspace, DocumentId documentId, CancellationToken cancellationToken)
{
_fileChangeTracker.EnsureSubscription();
return(_innerTextLoader.LoadTextAndVersionAsync(workspace, documentId, cancellationToken));
}
