protected override async Task<IEnumerable<CompletionItem>> GetItemsWorkerAsync(Document document, int position, CompletionTriggerInfo triggerInfo, CancellationToken cancellationToken)
{
var tree = await document.GetCSharpSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
// first try to get the #r string literal token. If we couldn't, then we're not in a #r
// reference directive and we immediately bail.
SyntaxToken stringLiteral;
if (!TryGetStringLiteralToken(tree, position, out stringLiteral, cancellationToken))
{
return null;
}
var documentPath = document.Project.IsSubmission ? null : document.FilePath;
var textChangeSpan = this.GetTextChangeSpan(stringLiteral, position);
var gacHelper = new GlobalAssemblyCacheCompletionHelper(this, textChangeSpan);
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var snapshot = text.FindCorrespondingEditorTextSnapshot();
if (snapshot == null)
{
// Passing null to GetFileSystemDiscoveryService raises an exception.
// Instead, return here since there is no longer snapshot for this document.
return null;
}
var assemblyReferenceResolver = document.Project.CompilationOptions.MetadataReferenceResolver as AssemblyReferenceResolver;
if (assemblyReferenceResolver == null)
{
return null;
}
var metadataFileResolver = assemblyReferenceResolver.PathResolver as MetadataFileReferenceResolver;
if (metadataFileResolver == null)
{
return null;
}
var fileSystemHelper = new FileSystemCompletionHelper(
this, textChangeSpan,
GetFileSystemDiscoveryService(snapshot),
Glyph.OpenFolder,
Glyph.Assembly,
searchPaths: metadataFileResolver.SearchPaths,
allowableExtensions: new[] { ".dll", ".exe" },
exclude: path => path.Contains(","));
var pathThroughLastSlash = this.GetPathThroughLastSlash(stringLiteral, position);
return gacHelper.GetItems(pathThroughLastSlash, documentPath).Concat(
fileSystemHelper.GetItems(pathThroughLastSlash, documentPath));
}
private ImmutableArray<CompletionItem> GetItems(SourceText text, int position, CompletionTriggerInfo triggerInfo, CancellationToken cancellationToken)
{
var line = text.Lines.GetLineFromPosition(position);
var lineText = text.ToString(TextSpan.FromBounds(line.Start, position));
var match = s_directiveRegex.Match(lineText);
if (!match.Success)
{
return ImmutableArray<CompletionItem>.Empty;
}
var quotedPathGroup = match.Groups[1];
var quotedPath = quotedPathGroup.Value;
var endsWithQuote = PathCompletionUtilities.EndsWithQuote(quotedPath);
if (endsWithQuote && (position >= line.Start + match.Length))
{
return ImmutableArray<CompletionItem>.Empty;
}
var buffer = text.Container.GetTextBuffer();
var snapshot = text.FindCorrespondingEditorTextSnapshot();
if (snapshot == null)
{
return ImmutableArray<CompletionItem>.Empty;
}
var fileSystem = PathCompletionUtilities.GetCurrentWorkingDirectoryDiscoveryService(snapshot);
var searchPaths = ImmutableArray.Create<string>(fileSystem.CurrentDirectory);
var helper = new FileSystemCompletionHelper(
this,
GetTextChangeSpan(text, position, quotedPathGroup),
fileSystem,
Glyph.OpenFolder,
Glyph.CSharpFile,
searchPaths: searchPaths,
allowableExtensions: new[] { ".csx" },
itemRules: ItemRules.Instance);
var pathThroughLastSlash = this.GetPathThroughLastSlash(text, position, quotedPathGroup);
return helper.GetItems(pathThroughLastSlash, documentPath: null);
}