public CompletionListUpdater(
ITrackingSpan applicableToSpan,
CompletionSessionData sessionData,
AsyncCompletionSessionDataSnapshot snapshotData,
RecentItemsManager recentItemsManager,
IGlobalOptionService globalOptions)
{
_sessionData = sessionData;
_snapshotData = snapshotData;
_recentItemsManager = recentItemsManager;
_applicableToSpan = applicableToSpan;
_filterText = applicableToSpan.GetText(_snapshotData.Snapshot);
_hasSuggestedItemOptions = _sessionData.HasSuggestionItemOptions || _snapshotData.DisplaySuggestionItem;
// We prefer using the original snapshot, which should always be available from items provided by Roslyn's CompletionSource.
// Only use data.Snapshot in the theoretically possible but rare case when all items we are handling are from some non-Roslyn CompletionSource.
var snapshotForDocument = TryGetInitialTriggerLocation(_snapshotData, out var intialTriggerLocation)
? intialTriggerLocation.Snapshot
: _snapshotData.Snapshot;
_document = snapshotForDocument?.TextBuffer.AsTextContainer().GetOpenDocumentInCurrentContext();
if (_document != null)
{
_completionService = _document.GetLanguageService <CompletionService>();
_completionRules = _completionService?.GetRules(globalOptions.GetCompletionOptions(_document.Project.Language)) ?? CompletionRules.Default;
// Let us make the completion Helper used for non-Roslyn items case-sensitive.
// We can change this if get requests from partner teams.
_completionHelper = CompletionHelper.GetHelper(_document);
_filterMethod = _completionService == null
? ((itemsWithPatternMatches, text) => CompletionService.FilterItems(_completionHelper, itemsWithPatternMatches, text))
: ((itemsWithPatternMatches, text) => _completionService.FilterItems(_document, itemsWithPatternMatches, text));
// Nothing to highlight if user hasn't typed anything yet.
_highlightMatchingPortions = _filterText.Length > 0 &&
globalOptions.GetOption(CompletionViewOptions.HighlightMatchingPortionsOfCompletionListItems, _document.Project.Language);
_showCompletionItemFilters = globalOptions.GetOption(CompletionViewOptions.ShowCompletionItemFilters, _document.Project.Language);
}
else
{
_completionService = null;
_completionRules = CompletionRules.Default;
// Let us make the completion Helper used for non-Roslyn items case-sensitive.
// We can change this if get requests from partner teams.
_completionHelper = new CompletionHelper(isCaseSensitive: true);
_filterMethod = (itemsWithPatternMatches, text) => CompletionService.FilterItems(_completionHelper, itemsWithPatternMatches, text);
_highlightMatchingPortions = false;
_showCompletionItemFilters = true;
}
}
public async Task <LSP.CompletionItem> HandleRequestAsync(LSP.CompletionItem completionItem, RequestContext context, CancellationToken cancellationToken)
{
var document = context.Document;
Contract.ThrowIfNull(document);
var completionService = document.Project.LanguageServices.GetRequiredService <CompletionService>();
var cacheEntry = GetCompletionListCacheEntry(completionItem);
if (cacheEntry == null)
{
// Don't have a cache associated with this completion item, cannot resolve.
context.TraceInformation("No cache entry found for the provided completion item at resolve time.");
return(completionItem);
}
var list = cacheEntry.CompletionList;
// Find the matching completion item in the completion list
var selectedItem = list.Items.FirstOrDefault(cachedCompletionItem => MatchesLSPCompletionItem(completionItem, cachedCompletionItem));
if (selectedItem == null)
{
return(completionItem);
}
var completionOptions = _globalOptions.GetCompletionOptions(document.Project.Language);
var displayOptions = _globalOptions.GetSymbolDescriptionOptions(document.Project.Language);
var description = await completionService.GetDescriptionAsync(document, selectedItem, completionOptions, displayOptions, cancellationToken).ConfigureAwait(false) !;
if (description != null)
{
var supportsVSExtensions = context.ClientCapabilities.HasVisualStudioLspCapability();
if (supportsVSExtensions)
{
var vsCompletionItem = (LSP.VSInternalCompletionItem)completionItem;
vsCompletionItem.Description = new ClassifiedTextElement(description.TaggedParts
.Select(tp => new ClassifiedTextRun(tp.Tag.ToClassificationTypeName(), tp.Text)));
}
else
{
var clientSupportsMarkdown = context.ClientCapabilities.TextDocument?.Completion?.CompletionItem?.DocumentationFormat.Contains(LSP.MarkupKind.Markdown) == true;
completionItem.Documentation = ProtocolConversions.GetDocumentationMarkupContent(description.TaggedParts, document, clientSupportsMarkdown);
}
}
// We compute the TextEdit resolves for complex text edits (e.g. override and partial
// method completions) here. Lazily resolving TextEdits is technically a violation of
// the LSP spec, but is currently supported by the VS client anyway. Once the VS client
// adheres to the spec, this logic will need to change and VS will need to provide
// official support for TextEdit resolution in some form.
if (selectedItem.IsComplexTextEdit)
{
Contract.ThrowIfTrue(completionItem.InsertText != null);
Contract.ThrowIfTrue(completionItem.TextEdit != null);
var snippetsSupported = context.ClientCapabilities.TextDocument?.Completion?.CompletionItem?.SnippetSupport ?? false;
completionItem.TextEdit = await GenerateTextEditAsync(
document, completionService, selectedItem, snippetsSupported, cancellationToken).ConfigureAwait(false);
}
return(completionItem);
}