protected abstract Task<IEnumerable<CompletionItem>> GetItemsWorkerAsync(Document document, int position, TextSpan span, CompletionTrigger trigger, CancellationToken cancellationToken);
public async Task <Mono.Debugging.Client.CompletionData> GetExpressionCompletionData(string exp, Mono.Debugging.Client.StackFrame frame, CancellationToken token)
{
var location = frame.SourceLocation;
var document = DocumentContext.AnalysisDocument;
if (document == null)
{
return(null);
}
var solution = DocumentContext.RoslynWorkspace.CurrentSolution;
var originalSnapshot = Editor.TextView.TextBuffer.CurrentSnapshot;
var text = originalSnapshot.GetText(new Span(0, originalSnapshot.Length));
var insertOffset = GetAdjustedContextPoint(originalSnapshot.GetLineFromLineNumber(location.EndLine - 1).Start.Position + location.EndColumn - 1, document);
text = text.Insert(insertOffset, ";" + exp + ";");
insertOffset++; //advance for 1 which represents `;` before expression
var textBuffer = PlatformCatalog.Instance.TextBufferFactoryService.CreateTextBuffer(text, Editor.TextView.TextBuffer.ContentType);
var snapshot = textBuffer.CurrentSnapshot;
try {
//Workaround Mono bug: https://github.com/mono/mono/issues/8700
snapshot.AsText();
} catch (Exception) {
}
// Fork the solution using this new primary buffer for the document and all of its linked documents.
var forkedSolution = solution.WithDocumentText(document.Id, snapshot.AsText(), PreservationMode.PreserveIdentity);
foreach (var link in document.GetLinkedDocumentIds())
{
forkedSolution = forkedSolution.WithDocumentText(link, snapshot.AsText(), PreservationMode.PreserveIdentity);
}
// Put it into a new workspace, and open it and its related documents
// with the projection buffer as the text.
var forkedWorkspace = new DebuggerIntelliSenseWorkspace(forkedSolution);
forkedWorkspace.OpenDocument(document.Id, textBuffer.AsTextContainer());
foreach (var link in document.GetLinkedDocumentIds())
{
forkedWorkspace.OpenDocument(link, textBuffer.AsTextContainer());
}
var cs = forkedWorkspace.Services.GetLanguageServices(LanguageNames.CSharp).GetService <CompletionService> ();
var trigger = new CompletionTrigger(CompletionTriggerKind.Invoke, '\0');
var roslynCompletions = await cs.GetCompletionsAsync(forkedWorkspace.CurrentSolution.GetDocument(document.Id), insertOffset + exp.Length, trigger, cancellationToken : token).ConfigureAwait(false);
if (roslynCompletions == null)
{
return(null);
}
var result = new Mono.Debugging.Client.CompletionData();
foreach (var roslynCompletion in roslynCompletions.Items)
{
if (roslynCompletion.Tags.Contains(WellKnownTags.Snippet))
{
continue;
}
result.Items.Add(new Mono.Debugging.Client.CompletionItem(roslynCompletion.DisplayText, RoslynTagsToDebuggerFlags(roslynCompletion.Tags)));
}
result.ExpressionLength = roslynCompletions.Span.Length;
return(result);
}
/// <summary>
/// Returns true if the completion item should be "soft" selected, or false if it should be "hard"
/// selected.
/// </summary>
private static bool ShouldSoftSelectItem(CompletionItem item, string filterText, CompletionTrigger trigger)
{
// If all that has been typed is puntuation, then don't hard select anything.
// It's possible the user is just typing language punctuation and selecting
// anything in the list will interfere. We only allow this if the filter text
// exactly matches something in the list already.
if (filterText.Length > 0 && IsAllPunctuation(filterText) && filterText != item.DisplayText)
{
return(true);
}
// If the user hasn't actually typed anything, then don't hard select any item.
// The only exception to this is if the completion provider has requested the
// item be preselected.
if (filterText.Length == 0)
{
// Item didn't want to be hard selected with no filter text.
// So definitely soft select it.
if (item.Rules.SelectionBehavior != CompletionItemSelectionBehavior.HardSelection)
{
return(true);
}
// Item did not ask to be preselected. So definitely soft select it.
if (item.Rules.MatchPriority == MatchPriority.Default)
{
return(true);
}
}
// The user typed something, or the item asked to be preselected. In
// either case, don't soft select this.
Debug.Assert(filterText.Length > 0 || item.Rules.MatchPriority != MatchPriority.Default);
return(false);
}
Task <CompletionContext> IAsyncCompletionSource.GetCompletionContextAsync(IAsyncCompletionSession session, CompletionTrigger trigger, SnapshotPoint triggerLocation, SnapshotSpan applicableToSpan, CancellationToken token) => GetCompletionContextAsync(session, trigger, triggerLocation, applicableToSpan, token);
public override bool ShouldTriggerCompletion(SourceText text, int position, CompletionTrigger trigger, Microsoft.CodeAnalysis.Options.OptionSet options)
{
return(trigger.Character == ' ');
}
private static CompletionTrigger GetCompletionTrigger(char?triggerChar)
{
return(triggerChar != null
? CompletionTrigger.CreateInsertionTrigger(triggerChar.Value)
: CompletionTrigger.Invoke);
}
async Task <ICompletionDataList> InternalHandleCodeCompletion(CodeCompletionContext completionContext, CompletionTriggerInfo triggerInfo, int triggerWordLength, CancellationToken token, bool forceSymbolCompletion = false)
{
var analysisDocument = DocumentContext.AnalysisDocument;
if (analysisDocument == null)
{
return(EmptyCompletionDataList);
}
var cs = DocumentContext.RoslynWorkspace.Services.GetLanguageServices(LanguageNames.CSharp).GetService <CompletionService> ();
SourceText sourceText;
if (!analysisDocument.TryGetText(out sourceText))
{
return(EmptyCompletionDataList);
}
CompletionTriggerKind kind;
switch (triggerInfo.CompletionTriggerReason)
{
case CompletionTriggerReason.CharTyped:
kind = CompletionTriggerKind.Insertion;
break;
case CompletionTriggerReason.CompletionCommand:
kind = CompletionTriggerKind.InvokeAndCommitIfUnique;
break;
case CompletionTriggerReason.BackspaceOrDeleteCommand:
kind = CompletionTriggerKind.Deletion;
break;
case CompletionTriggerReason.RetriggerCommand:
kind = CompletionTriggerKind.InvokeAndCommitIfUnique;
break;
default:
kind = CompletionTriggerKind.Insertion;
break;
}
var triggerSnapshot = Editor.GetPlatformTextBuffer().CurrentSnapshot;
var trigger = new CompletionTrigger(kind, triggerInfo.TriggerCharacter.HasValue ? triggerInfo.TriggerCharacter.Value : '\0');
if (triggerInfo.CompletionTriggerReason == CompletionTriggerReason.CharTyped)
{
if (!cs.ShouldTriggerCompletion(sourceText, completionContext.TriggerOffset, trigger, null))
{
return(EmptyCompletionDataList);
}
}
Counters.ProcessCodeCompletion.Trace("C#: Getting completions");
var customOptions = DocumentContext.RoslynWorkspace.Options
.WithChangedOption(CompletionOptions.TriggerOnDeletion, LanguageNames.CSharp, true)
.WithChangedOption(CompletionOptions.HideAdvancedMembers, LanguageNames.CSharp, IdeApp.Preferences.CompletionOptionsHideAdvancedMembers);
var completionList = await Task.Run(() => cs.GetCompletionsAsync(analysisDocument, Editor.CaretOffset, trigger, options: customOptions, cancellationToken: token)).ConfigureAwait(false);
Counters.ProcessCodeCompletion.Trace("C#: Got completions");
if (completionList == null)
{
return(EmptyCompletionDataList);
}
var result = new CompletionDataList();
result.TriggerWordLength = triggerWordLength;
CSharpCompletionData defaultCompletionData = null;
bool first = true, addProtocolCompletion = false;
foreach (var item in completionList.Items)
{
if (string.IsNullOrEmpty(item.DisplayText))
{
continue;
}
var data = new CSharpCompletionData(analysisDocument, triggerSnapshot, cs, item);
if (first)
{
first = false;
addProtocolCompletion = data.Provider is OverrideCompletionProvider;
}
result.Add(data);
if (item.Rules.MatchPriority > 0)
{
if (defaultCompletionData == null || defaultCompletionData.Rules.MatchPriority < item.Rules.MatchPriority)
{
defaultCompletionData = data;
}
}
}
result.AutoCompleteUniqueMatch = (triggerInfo.CompletionTriggerReason == CompletionTriggerReason.CompletionCommand);
var partialDoc = analysisDocument.WithFrozenPartialSemantics(token);
var semanticModel = await partialDoc.GetSemanticModelAsync(token).ConfigureAwait(false);
var syntaxContext = CSharpSyntaxContext.CreateContext(DocumentContext.RoslynWorkspace, semanticModel, completionContext.TriggerOffset, token);
if (addProtocolCompletion)
{
var provider = new ProtocolMemberCompletionProvider();
var protocolMemberContext = new CompletionContext(provider, analysisDocument, completionContext.TriggerOffset, new TextSpan(completionContext.TriggerOffset, completionContext.TriggerWordLength), trigger, customOptions, token);
await provider.ProvideCompletionsAsync(protocolMemberContext);
foreach (var item in protocolMemberContext.Items)
{
if (string.IsNullOrEmpty(item.DisplayText))
{
continue;
}
var data = new CSharpCompletionData(analysisDocument, triggerSnapshot, cs, item);
result.Add(data);
}
}
if (forceSymbolCompletion || IdeApp.Preferences.AddImportedItemsToCompletionList)
{
Counters.ProcessCodeCompletion.Trace("C#: Adding import completion data");
AddImportCompletionData(syntaxContext, result, semanticModel, completionContext.TriggerOffset, token);
Counters.ProcessCodeCompletion.Trace("C#: Added import completion data");
}
if (defaultCompletionData != null)
{
result.DefaultCompletionString = defaultCompletionData.DisplayText;
}
if (completionList.SuggestionModeItem != null)
{
if (completionList.Items.Contains(completionList.SuggestionModeItem))
{
result.DefaultCompletionString = completionList.SuggestionModeItem.DisplayText;
}
// if a suggestion mode item is present autoselection is disabled
// for example in the lambda case the suggestion mode item is '<lambda expression>' which is not part of the completion item list but taggs the completion list as auto select == false.
result.AutoSelect = false;
}
if (triggerInfo.TriggerCharacter == '_' && triggerWordLength == 1)
{
result.AutoSelect = false;
}
return(result);
}
public async Task <CompletionContext> GetCompletionContextAsync(IAsyncCompletionSession session, CompletionTrigger trigger, SnapshotPoint triggerLocation, SnapshotSpan applicableToSpan, CancellationToken token)
{
var text = triggerLocation.Snapshot.GetText(0, triggerLocation.Position);
var data = await DebuggingService.GetCompletionDataAsync(DebuggingService.CurrentFrame, text, token);
if (data == null)
{
return(new CompletionContext(ImmutableArray <CompletionItem> .Empty));
}
var builder = ImmutableArray.CreateBuilder <CompletionItem> (data.Items.Count);
foreach (var item in data.Items)
{
var image = new ImageElement(ObjectValueTreeViewController.GetImageId(item.Flags));
builder.Add(new CompletionItem(item.Name, this, image));
}
return(new CompletionContext(builder.MoveToImmutable()));
}
void ICommandHandler <TypeCharCommandArgs> .ExecuteCommand(TypeCharCommandArgs args, Action nextHandler)
{
AssertIsForeground();
// When a character is typed it is *always* sent through to the editor. This way the
// editor always represents what would have been typed had completion not been involved
// at this point. That means that if we decide to commit, then undo'ing the commit will
// return you to the code that you would have typed if completion was not up.
//
// The steps we follow for commit are as follows:
//
// 1) send the commit character through to the buffer.
// 2) open a transaction.
// 2a) roll back the text to before the text was sent through
// 2b) commit the item.
// 2c) send the commit character through again.*
// 2d) commit the transaction.
//
// 2c is very important. it makes sure that post our commit all our normal features
// run depending on what got typed. For example if the commit character was (
// then brace completion may run. If it was ; then formatting may run. But, importantly
// this code doesn't need to know anything about that. Furthermore, because that code
// runs within this transaction, then the user can always undo and get to what the code
// would have been if completion was not involved.
//
// 2c*: note sending the commit character through to the buffer again can be controlled
// by the completion item. For example, completion items that want to totally handle
// what gets output into the buffer can ask for this not to happen. An example of this
// is override completion. If the user types "override Method(" then we'll want to
// spit out the entire method and *not* also spit out "(" again.
// In order to support 2a (rolling back), we capture hte state of the buffer before
// we send the character through. We then just apply the edits in reverse order to
// roll us back.
var initialTextSnapshot = this.SubjectBuffer.CurrentSnapshot;
var initialCaretPosition = GetCaretPointInViewBuffer();
// Note: while we're doing this, we don't want to hear about buffer changes (since we
// know they're going to happen). So we disconnect and reconnect to the event
// afterwards. That way we can hear about changes to the buffer that don't happen
// through us.
// Automatic Brace Completion may also move the caret, so unsubscribe from that too
this.TextView.TextBuffer.PostChanged -= OnTextViewBufferPostChanged;
this.TextView.Caret.PositionChanged -= OnCaretPositionChanged;
// In Venus/Razor, the user might be typing on the buffer's seam. This means that,
// depending on the character typed, the character may not go into our buffer.
var isOnSeam = IsOnSeam();
try
{
nextHandler();
}
finally
{
this.TextView.TextBuffer.PostChanged += OnTextViewBufferPostChanged;
this.TextView.Caret.PositionChanged += OnCaretPositionChanged;
}
// We only want to process typechar if it is a normal typechar and no one else is
// involved. i.e. if there was a typechar, but someone processed it and moved the caret
// somewhere else then we don't want completion. Also, if a character was typed but
// something intercepted and placed different text into the editor, then we don't want
// to proceed.
if (this.TextView.TypeCharWasHandledStrangely(this.SubjectBuffer, args.TypedChar))
{
if (sessionOpt != null)
{
// If we're on a seam (razor) with a computation, and the user types a character
// that goes into the other side of the seam, the character may be a commit character.
// If it's a commit character, just commit without trying to check caret position,
// since the caret is no longer in our buffer.
if (isOnSeam)
{
var model = this.WaitForModel();
if (this.CommitIfCommitCharacter(args.TypedChar, model, initialTextSnapshot, nextHandler))
{
return;
}
}
if (_autoBraceCompletionChars.Contains(args.TypedChar) &&
this.SubjectBuffer.GetFeatureOnOffOption(InternalFeatureOnOffOptions.AutomaticPairCompletion))
{
var model = this.WaitForModel();
if (this.CommitIfCommitCharacter(args.TypedChar, model, initialTextSnapshot, nextHandler))
{
// I don't think there is any better way than this. if typed char is one of auto brace completion char,
// we don't do multiple buffer change check
return;
}
}
// If we were computing anything, we stop. We only want to process a typechar
// if it was a normal character.
this.DismissSessionIfActive();
}
return;
}
var completionService = this.GetCompletionService();
if (completionService == null)
{
return;
}
var options = GetOptions();
Contract.ThrowIfNull(options);
var isTextuallyTriggered = IsTextualTriggerCharacter(completionService, args.TypedChar, options);
var isPotentialFilterCharacter = IsPotentialFilterCharacter(args);
var trigger = CompletionTrigger.CreateInsertionTrigger(args.TypedChar);
if (sessionOpt == null)
{
// No computation at all. If this is not a trigger character, we just ignore it and
// stay in this state. Otherwise, if it's a trigger character, start up a new
// computation and start computing the model in the background.
if (isTextuallyTriggered)
{
// First create the session that represents that we now have a potential
// completion list. Then tell it to start computing.
StartNewModelComputation(completionService, trigger, filterItems: true, dismissIfEmptyAllowed: true);
return;
}
else
{
// No need to do anything. Just stay in the state where we have no session.
return;
}
}
else
{
sessionOpt.UpdateModelTrackingSpan(initialCaretPosition);
// If the session is up, it may be in one of many states. It may know nothing
// (because it is currently computing the list of completions). Or it may have a
// list of completions that it has filtered.
// If the user types something which is absolutely known to be a filter character
// then we can just proceed without blocking.
if (isPotentialFilterCharacter)
{
if (isTextuallyTriggered)
{
// The character typed was something like "a". It can both filter a list if
// we have computed one, or it can trigger a new list. Ask the computation
// to compute again. If nothing has been computed, then it will try to
// compute again, otherwise it will just ignore this request.
sessionOpt.ComputeModel(completionService, trigger, _roles, options);
}
// Now filter whatever result we have.
sessionOpt.FilterModel(
CompletionFilterReason.TypeChar,
recheckCaretPosition: false,
dismissIfEmptyAllowed: true,
filterState: null);
}
else
{
// It wasn't a trigger or filter character. At this point, we make our
// determination on what to do based on what has actually been computed and
// what's being typed. This means waiting on the session and will effectively
// block the user.
var model = WaitForModel();
// What they type may end up filtering, committing, or else will dismiss.
//
// For example, we may filter in cases like this: "Color."
//
// "Color" will have already filtered the list down to some things like
// "Color", "Color.Red", "Color.Blue", etc. When we process the 'dot', we
// actually want to filter some more. But we can't know that ahead of time until
// we have computed the list of completions.
if (this.IsFilterCharacter(args.TypedChar, model))
{
// Known to be a filter character for the currently selected item. So just
// filter the session.
sessionOpt.FilterModel(CompletionFilterReason.TypeChar,
recheckCaretPosition: false,
dismissIfEmptyAllowed: true,
filterState: null);
return;
}
// It wasn't a filter character. We'll either commit what's selected, or we'll
// dismiss the completion list. First, ensure that what was typed is in the
// buffer.
// Now, commit if it was a commit character.
this.CommitIfCommitCharacter(args.TypedChar, model, initialTextSnapshot, nextHandler);
// At this point we don't want a session anymore (either because we committed, or
// because we got a character we don't know how to handle). Unilaterally dismiss
// the session.
DismissSessionIfActive();
// The character may commit/dismiss and then trigger completion again. So check
// for that here.
if (isTextuallyTriggered)
{
StartNewModelComputation(
completionService, trigger, filterItems: true, dismissIfEmptyAllowed: true);
return;
}
}
}
}
public override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options) => ShouldTriggerCompletion();
public override async Task <CompletionContext> GetCompletionContextAsync(IAsyncCompletionSession session, CompletionTrigger trigger, SnapshotPoint triggerLocation, SnapshotSpan applicableToSpan, CancellationToken token)
{
var context = await GetSessionContext(session, triggerLocation, token);
var rr = context.rr;
var doc = context.doc;
var spine = context.spine;
if (rr?.ElementSyntax != null)
{
var reason = ConvertReason(trigger.Reason, trigger.Character);
if (reason.HasValue && IsPossibleExpressionCompletionContext(spine))
{
string expression = spine.GetIncompleteValue(triggerLocation.Snapshot);
var triggerState = GetTriggerState(
expression,
reason.Value,
trigger.Character,
rr.IsCondition(),
out int triggerLength,
out ExpressionNode triggerExpression,
out var listKind,
out IReadOnlyList <ExpressionNode> comparandVariables
);
if (triggerState != TriggerState.None)
{
var info = rr.GetElementOrAttributeValueInfo(doc);
if (info != null && info.ValueKind != MSBuildValueKind.Nothing)
{
session.Properties.AddProperty(typeof(TriggerState), triggerState);
return(await GetExpressionCompletionsAsync(
session, info, triggerState, listKind, triggerLength, triggerExpression, comparandVariables, rr, triggerLocation, doc, token));
}
}
}
}
return(await base.GetCompletionContextAsync(session, trigger, triggerLocation, applicableToSpan, token));
}
public CompletionStartData InitializeCompletion(CompletionTrigger trigger, SnapshotPoint triggerLocation, CancellationToken token)
{
return(CompletionStartData.DoesNotParticipateInCompletion);
}
Task <CompletionContext> IAsyncCompletionSource.GetCompletionContextAsync(IAsyncCompletionSession session, CompletionTrigger trigger, SnapshotPoint triggerLocation, SnapshotSpan applicableToSpan, CancellationToken token)
{
throw new NotImplementedException("This item source is not meant to be registered. It is used only to provide a tooltip.");
}
public override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options)
{
foreach (var language in GetLanguageProviders(text => text.GetOpenDocumentInCurrentContextWithChanges(), text))
{
var completionProvider = (language as IEmbeddedLanguageFeatures)?.CompletionProvider;
if (completionProvider != null)
{
if (completionProvider.ShouldTriggerCompletion(
text, caretPosition, trigger, options))
{
return(true);
}
}
}
return(false);
}
protected override async Task <IEnumerable <CompletionItem> > GetItemsWorkerAsync(
Document document, int position,
CompletionTrigger trigger, CancellationToken cancellationToken)
{
try
{
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
var token = tree.FindTokenOnLeftOfPosition(position, cancellationToken);
var parentTrivia = token.GetAncestor <DocumentationCommentTriviaSyntax>();
if (parentTrivia == null)
{
return(null);
}
var attachedToken = parentTrivia.ParentTrivia.Token;
if (attachedToken.Kind() == SyntaxKind.None)
{
return(null);
}
var semanticModel = await document.GetSemanticModelForNodeAsync(attachedToken.Parent, cancellationToken).ConfigureAwait(false);
ISymbol declaredSymbol = null;
var memberDeclaration = attachedToken.GetAncestor <MemberDeclarationSyntax>();
if (memberDeclaration != null)
{
declaredSymbol = semanticModel.GetDeclaredSymbol(memberDeclaration, cancellationToken);
}
else
{
var typeDeclaration = attachedToken.GetAncestor <TypeDeclarationSyntax>();
if (typeDeclaration != null)
{
declaredSymbol = semanticModel.GetDeclaredSymbol(typeDeclaration, cancellationToken);
}
}
if (IsAttributeNameContext(token, position, out var elementName, out var existingAttributes))
{
return(GetAttributeItems(elementName, existingAttributes));
}
var wasTriggeredAfterSpace = trigger.Kind == CompletionTriggerKind.Insertion && trigger.Character == ' ';
if (wasTriggeredAfterSpace)
{
// Nothing below this point should triggered by a space character
// (only attribute names should be triggered by <SPACE>)
return(null);
}
if (IsAttributeValueContext(token, out elementName, out var attributeName))
{
return(GetAttributeValueItems(declaredSymbol, elementName, attributeName));
}
if (trigger.Kind == CompletionTriggerKind.Insertion && trigger.Character != '<')
{
// With the use of IsTriggerAfterSpaceOrStartOfWordCharacter, the code below is much
// too aggressive at suggesting tags, so exit early before degrading the experience
return(null);
}
var items = new List <CompletionItem>();
if (token.Parent.Kind() == SyntaxKind.XmlEmptyElement || token.Parent.Kind() == SyntaxKind.XmlText ||
(token.Parent.IsKind(SyntaxKind.XmlElementEndTag) && token.IsKind(SyntaxKind.GreaterThanToken)) ||
(token.Parent.IsKind(SyntaxKind.XmlName) && token.Parent.IsParentKind(SyntaxKind.XmlEmptyElement)))
{
// The user is typing inside an XmlElement
if (token.Parent.Parent.Kind() == SyntaxKind.XmlElement ||
token.Parent.Parent.IsParentKind(SyntaxKind.XmlElement))
{
// Avoid including language keywords when following < or <text, since these cases should only be
// attempting to complete the XML name (which for language keywords is 'see'). While the parser
// treats the 'name' in '< name' as an XML name, we don't treat it like that here so the completion
// experience is consistent for '< ' and '< n'.
var xmlNameOnly = token.IsKind(SyntaxKind.LessThanToken) ||
(token.Parent.IsKind(SyntaxKind.XmlName) && !token.HasLeadingTrivia);
var includeKeywords = !xmlNameOnly;
items.AddRange(GetNestedItems(declaredSymbol, includeKeywords));
}
if (token.Parent.Parent is XmlElementSyntax xmlElement)
{
AddXmlElementItems(items, xmlElement.StartTag);
}
if (token.Parent.IsParentKind(SyntaxKind.XmlEmptyElement) &&
token.Parent.Parent.Parent is XmlElementSyntax nestedXmlElement)
{
AddXmlElementItems(items, nestedXmlElement.StartTag);
}
if (token.Parent.Parent is DocumentationCommentTriviaSyntax ||
(token.Parent.Parent.IsKind(SyntaxKind.XmlEmptyElement) && token.Parent.Parent.Parent is DocumentationCommentTriviaSyntax))
{
items.AddRange(GetTopLevelItems(declaredSymbol, parentTrivia));
}
}
if (token.Parent is XmlElementStartTagSyntax startTag &&
token == startTag.GreaterThanToken)
{
AddXmlElementItems(items, startTag);
}
items.AddRange(GetAlwaysVisibleItems());
return(items);
}
catch (Exception e) when(FatalError.ReportWithoutCrashUnlessCanceled(e))
{
return(SpecializedCollections.EmptyEnumerable <CompletionItem>());
}
}
public sealed override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options) => ShouldTriggerCompletionImpl(text, caretPosition, trigger);
public override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options)
{
return(trigger.Kind switch
{
CompletionTriggerKind.Invoke => true,
CompletionTriggerKind.InvokeAndCommitIfUnique => true,
CompletionTriggerKind.Insertion => trigger.Character == '"',
_ => false,
});
internal sealed override bool ShouldTriggerCompletion(HostLanguageServices languageServices, SourceText text, int caretPosition, CompletionTrigger trigger, CompletionOptions options) => ShouldTriggerCompletionImpl(text, caretPosition, trigger);
public override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options)
{
if (trigger.Kind == CompletionTriggerKind.Invoke ||
trigger.Kind == CompletionTriggerKind.InvokeAndCommitIfUnique)
{
return(true);
}
if (trigger.Kind == CompletionTriggerKind.Insertion)
{
return(IsTriggerCharacter(trigger.Character));
}
return(false);
}
protected abstract bool ShouldTriggerCompletionImpl(SourceText text, int caretPosition, CompletionTrigger trigger);
internal Task <CompletionContext> GetCompletionContextAsync(IAsyncCompletionSession session, CompletionTrigger trigger, SnapshotPoint triggerLocation, SnapshotSpan applicableToSpan, CancellationToken token)
{
CompletionContext context;
if (TextView.TryGetWordCompletionData(out var wordCompletionData))
{
var itemsRaw = wordCompletionData.WordCollection.Select(x => new CompletionItem(x, this)).ToArray();
var items = ImmutableArray.Create <CompletionItem>(itemsRaw);
context = new CompletionContext(items);
}
else
{
context = CompletionContext.Empty;
}
return(Task.FromResult(context));
}
private void ExecuteBackspaceOrDelete(ITextView textView, Action nextHandler, bool isDelete)
{
AssertIsForeground();
char?deletedChar;
var subjectBufferCaretPoint = GetCaretPointInSubjectBuffer();
var viewBufferCaretPoint = GetCaretPointInViewBuffer();
if (isDelete)
{
deletedChar = viewBufferCaretPoint.Position >= 0 && viewBufferCaretPoint.Position < textView.TextBuffer.CurrentSnapshot.Length
? textView.TextBuffer.CurrentSnapshot[viewBufferCaretPoint.Position]
: default(char?);
}
else
{
// backspace
deletedChar = viewBufferCaretPoint > 0
? textView.TextBuffer.CurrentSnapshot[viewBufferCaretPoint - 1]
: default(char?);
}
if (sessionOpt == null)
{
// No computation. Disconnect from caret position changes, send the backspace through,
// and start a computation.
this.TextView.TextBuffer.PostChanged -= OnTextViewBufferPostChanged;
this.TextView.Caret.PositionChanged -= OnCaretPositionChanged;
try
{
nextHandler();
}
finally
{
this.TextView.TextBuffer.PostChanged += OnTextViewBufferPostChanged;
this.TextView.Caret.PositionChanged += OnCaretPositionChanged;
}
var trigger = CompletionTrigger.CreateDeletionTrigger(deletedChar.GetValueOrDefault());
var completionService = this.GetCompletionService();
if (completionService != null)
{
this.StartNewModelComputation(completionService, trigger);
}
return;
}
else
{
var textBeforeDeletion = SubjectBuffer.AsTextContainer().CurrentText;
var documentBeforeDeletion = textBeforeDeletion.GetDocumentWithFrozenPartialSemanticsAsync(CancellationToken.None)
.WaitAndGetResult(CancellationToken.None);
this.TextView.TextBuffer.PostChanged -= OnTextViewBufferPostChanged;
this.TextView.Caret.PositionChanged -= OnCaretPositionChanged;
try
{
nextHandler();
}
finally
{
this.TextView.TextBuffer.PostChanged += OnTextViewBufferPostChanged;
this.TextView.Caret.PositionChanged += OnCaretPositionChanged;
}
var model = sessionOpt.Computation.InitialUnfilteredModel;
if ((model == null && CaretHasLeftDefaultTrackingSpan(subjectBufferCaretPoint, documentBeforeDeletion)) ||
(model != null && this.IsCaretOutsideAllItemBounds(model, this.GetCaretPointInViewBuffer())) ||
(model != null && model.OriginalList.Rules.DismissIfLastCharacterDeleted && AllFilterTextsEmpty(model, GetCaretPointInViewBuffer())))
{
// If the caret moved out of bounds of our items, then we want to dismiss the list.
this.DismissSessionIfActive();
return;
}
else if (model != null)
{
sessionOpt.FilterModel(CompletionFilterReason.Deletion, filterState: null);
}
}
}
CompletionStartData IAsyncCompletionSource.InitializeCompletion(CompletionTrigger trigger, SnapshotPoint triggerLocation, CancellationToken token) => InitializeCompletion(trigger, triggerLocation, token);
public override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options)
{
if (Options == null)
{
// Package not loaded yet (e.g. no solution opened)
return(false);
}
bool shouldTrigger = triggerCompletions.Any(c => c.ShouldTriggerCompletion(text, caretPosition, trigger, Options));
return(shouldTrigger || base.ShouldTriggerCompletion(text, caretPosition, trigger, options));
}
private async Task <CompletionList> GetCompletionListAsync(CompletionService completionService, CompletionTrigger trigger, CancellationToken cancellationToken)
{
return(_documentOpt != null
? await completionService.GetCompletionsAsync(_documentOpt, _subjectBufferCaretPosition, trigger, _roles, _options, cancellationToken).ConfigureAwait(false)
: null);
}
protected abstract Task <CompletionItem> GetSuggestionModeItemAsync(Document document, int position, TextSpan span, CompletionTrigger triggerInfo, CancellationToken cancellationToken);
internal Task <CompletionList> GetCompletionListAsync(
CompletionService service,
Document document, int position, CompletionTrigger triggerInfo, OptionSet options = null)
{
return(service.GetCompletionsAsync(document, position, triggerInfo, options: options));
}
protected override ImmutableArray <CompletionProvider> GetProviders(ImmutableHashSet <string> roles, CompletionTrigger trigger)
{
return(TestProviders);
}
protected override async Task <CompletionItem> GetSuggestionModeItemAsync(
Document document, int position, TextSpan itemSpan, CompletionTrigger trigger, CancellationToken cancellationToken = default)
{
if (trigger.Kind != CompletionTriggerKind.Snippets)
{
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
var token = tree
.FindTokenOnLeftOfPosition(position, cancellationToken)
.GetPreviousTokenIfTouchingWord(position);
if (token.Kind() == SyntaxKind.None)
{
return(null);
}
var semanticModel = await document.GetSemanticModelForNodeAsync(token.Parent, cancellationToken).ConfigureAwait(false);
var typeInferrer = document.GetLanguageService <ITypeInferenceService>();
if (IsLambdaExpression(semanticModel, position, token, typeInferrer, cancellationToken))
{
return(CreateSuggestionModeItem(CSharpFeaturesResources.lambda_expression, CSharpFeaturesResources.Autoselect_disabled_due_to_potential_lambda_declaration));
}
else if (IsAnonymousObjectCreation(token))
{
return(CreateSuggestionModeItem(CSharpFeaturesResources.member_name, CSharpFeaturesResources.Autoselect_disabled_due_to_possible_explicitly_named_anonymous_type_member_creation));
}
else if (IsPotentialPatternVariableDeclaration(tree.FindTokenOnLeftOfPosition(position, cancellationToken)))
{
return(CreateSuggestionModeItem(CSharpFeaturesResources.pattern_variable, CSharpFeaturesResources.Autoselect_disabled_due_to_potential_pattern_variable_declaration));
}
else if (token.IsPreProcessorExpressionContext())
{
return(CreateEmptySuggestionModeItem());
}
else if (token.IsKindOrHasMatchingText(SyntaxKind.FromKeyword) || token.IsKindOrHasMatchingText(SyntaxKind.JoinKeyword))
{
return(CreateSuggestionModeItem(CSharpFeaturesResources.range_variable, CSharpFeaturesResources.Autoselect_disabled_due_to_potential_range_variable_declaration));
}
else if (tree.IsNamespaceDeclarationNameContext(position, cancellationToken))
{
return(CreateSuggestionModeItem(CSharpFeaturesResources.namespace_name, CSharpFeaturesResources.Autoselect_disabled_due_to_namespace_declaration));
}
else if (tree.IsPartialTypeDeclarationNameContext(position, cancellationToken, out var typeDeclaration))
{
switch (typeDeclaration.Keyword.Kind())
{
case SyntaxKind.ClassKeyword:
return(CreateSuggestionModeItem(CSharpFeaturesResources.class_name, CSharpFeaturesResources.Autoselect_disabled_due_to_type_declaration));
case SyntaxKind.StructKeyword:
return(CreateSuggestionModeItem(CSharpFeaturesResources.struct_name, CSharpFeaturesResources.Autoselect_disabled_due_to_type_declaration));
case SyntaxKind.InterfaceKeyword:
return(CreateSuggestionModeItem(CSharpFeaturesResources.interface_name, CSharpFeaturesResources.Autoselect_disabled_due_to_type_declaration));
}
}
else if (tree.IsPossibleDeconstructionDesignation(position, cancellationToken))
{
return(CreateSuggestionModeItem(CSharpFeaturesResources.designation_name,
CSharpFeaturesResources.Autoselect_disabled_due_to_possible_deconstruction_declaration));
}
}
return(null);
}
public async Task <CompletionContext> GetCompletionContextAsync(IAsyncCompletionSession session, CompletionTrigger trigger, SnapshotPoint triggerLocation, SnapshotSpan applicableToSpan, CancellationToken token)
{
var document = applicableToSpan.Snapshot.GetOpenDocumentInCurrentContextWithChanges();
Microsoft.CodeAnalysis.Completion.CompletionTrigger CreateTrigger()
{
switch (trigger.Reason)
{
case CompletionTriggerReason.Invoke:
case CompletionTriggerReason.InvokeAndCommitIfUnique:
return(Microsoft.CodeAnalysis.Completion.CompletionTrigger.Invoke);
case CompletionTriggerReason.Insertion:
return(Microsoft.CodeAnalysis.Completion.CompletionTrigger.CreateInsertionTrigger(trigger.Character));
case CompletionTriggerReason.Backspace:
case CompletionTriggerReason.Deletion:
return(Microsoft.CodeAnalysis.Completion.CompletionTrigger.CreateDeletionTrigger(trigger.Character));
default:
throw new ArgumentOutOfRangeException();
}
}
var completions = await _completionService.GetCompletionsAsync(
document,
triggerLocation.Position,
CreateTrigger(),
document.Workspace.Options,
cancellationToken : token);
if (completions == null)
{
return(CompletionContext.Empty);
}
var items = completions.Items
.Select(x =>
{
var item = new CompletionItem(x.DisplayText, this, new ImageElement(x.Glyph.GetImageId()));
item.Properties.AddProperty("Document", document);
item.Properties.AddProperty("CompletionItem", x);
return(item);
})
.ToImmutableArray();
return(new CompletionContext(items));
}
protected abstract Task<CompletionItem> GetSuggestionModeItemAsync(Document document, int position, TextSpan span, CompletionTrigger triggerInfo, CancellationToken cancellationToken);
public Task <CompletionContext> GetCompletionContextAsync(IAsyncCompletionSession session, CompletionTrigger trigger, SnapshotPoint triggerLocation, SnapshotSpan applicableToSpan, CancellationToken token)
{
if (_parser.TryGetCompletionList(triggerLocation, _attributeName, out IEnumerable <CompletionItem> completions))
{
return(Task.FromResult(new CompletionContext(completions.ToImmutableArray())));
}
return(Task.FromResult(CompletionContext.Empty));
}
