public override Task ProvideCompletionsAsync(CompletionContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
// FilePath will be null when the editor is open for cases where we don't have a file on disk (C# interactive window and others).
if (context.Document?.FilePath == null ||
!context.Document.FilePath.EndsWith(".cshtml", StringComparison.OrdinalIgnoreCase))
{
// Not a Razor file.
return(Task.CompletedTask);
}
if (!_textBufferProvider.TryGetFromDocument(context.Document, out var textBuffer) ||
!_asyncCompletionBroker.IsCompletionSupported(textBuffer.ContentType))
{
// Completion is not supported.
return(Task.CompletedTask);
}
var result = AddCompletionItems(context);
return(result);
}
public override bool TryGetFromDocument(TextDocument document, out RazorCodeDocument codeDocument)
{
if (document == null)
{
throw new ArgumentNullException(nameof(document));
}
if (!_bufferProvider.TryGetFromDocument(document, out var textBuffer))
{
// Could not find a Razor buffer associated with the document.
codeDocument = null;
return(false);
}
foreach (var codeDocumentProvider in _codeDocumentProviders)
{
if (codeDocumentProvider.TryGetFromBuffer(textBuffer, out codeDocument))
{
return(true);
}
}
// A Razor code document has not yet been associated with the buffer yet.
codeDocument = null;
return(false);
}
private Task AddCompletionItems(CompletionContext context)
{
if (!_textBufferProvider.TryGetFromDocument(context.Document, out var textBuffer) ||
_dependencies.Value.AsyncCompletionBroker.IsCompletionSupported(textBuffer.ContentType))
{
// Async completion is supported that code path will handle completion.
return(Task.CompletedTask);
}
if (!_codeDocumentProvider.Value.TryGetFromDocument(context.Document, out var codeDocument))
{
// A Razor code document has not yet been associated with the document.
return(Task.CompletedTask);
}
var syntaxTree = codeDocument.GetSyntaxTree();
if (syntaxTree == null)
{
// No syntax tree has been computed for the current document.
return(Task.CompletedTask);
}
if (!TryGetRazorSnapshotPoint(context, out var razorSnapshotPoint))
{
// Could not find associated Razor location.
return(Task.CompletedTask);
}
var location = new SourceSpan(razorSnapshotPoint.Position, 0);
var razorCompletionItems = _dependencies.Value.CompletionFactsService.GetCompletionItems(syntaxTree, location);
foreach (var razorCompletionItem in razorCompletionItems)
{
if (razorCompletionItem.Kind != RazorCompletionItemKind.Directive)
{
// Don't support any other types of completion kinds other than directives.
continue;
}
var propertyDictionary = new Dictionary <string, string>(StringComparer.Ordinal);
if (!string.IsNullOrEmpty(razorCompletionItem.Description))
{
propertyDictionary[DescriptionKey] = razorCompletionItem.Description;
}
var completionItem = CompletionItem.Create(
razorCompletionItem.InsertText,
// This groups all Razor directives together
sortText: "_RazorDirective_",
rules: CompletionItemRules.Create(formatOnCommit: false),
tags: ImmutableArray.Create(WellKnownTags.Intrinsic),
properties: propertyDictionary.ToImmutableDictionary());
context.AddItem(completionItem);
}
return(Task.CompletedTask);
}
