private async Task CheckResultsAsync(Document document, int position, bool isBuilder)
{
var triggerInfos = new List <CompletionTrigger>();
triggerInfos.Add(CompletionTrigger.CreateInsertionTrigger('a'));
triggerInfos.Add(CompletionTrigger.Invoke);
triggerInfos.Add(CompletionTrigger.CreateDeletionTrigger('z'));
var service = GetCompletionService(document.Project);
var provider = Assert.Single(service.GetTestAccessor().GetAllProviders(ImmutableHashSet <string> .Empty));
foreach (var triggerInfo in triggerInfos)
{
var completionList = await service.GetTestAccessor().GetContextAsync(
provider, document, position, triggerInfo,
options: CompletionOptions.Default, cancellationToken: CancellationToken.None);
if (isBuilder)
{
Assert.NotNull(completionList);
Assert.True(completionList.SuggestionModeItem != null, "Expecting a suggestion mode, but none was present");
}
else
{
if (completionList != null)
{
Assert.True(completionList.SuggestionModeItem == null, "group.Builder == " + (completionList.SuggestionModeItem != null ? completionList.SuggestionModeItem.DisplayText : "null"));
}
}
}
}
private async Task CheckResultsAsync(Document document, int position, bool isBuilder)
{
var triggerInfos = new List <CompletionTrigger>();
triggerInfos.Add(CompletionTrigger.CreateInsertionTrigger('a'));
triggerInfos.Add(CompletionTrigger.Invoke);
triggerInfos.Add(CompletionTrigger.CreateDeletionTrigger('z'));
var service = GetCompletionService(document.Project.Solution.Workspace);
foreach (var triggerInfo in triggerInfos)
{
var completionList = await service.GetTestAccessor().GetContextAsync(
service.GetTestAccessor().ExclusiveProviders?[0], document, position, triggerInfo,
options: null, cancellationToken: CancellationToken.None);
if (isBuilder)
{
Assert.NotNull(completionList);
Assert.True(completionList.SuggestionModeItem != null, "Expecting a suggestion mode, but none was present");
}
else
{
if (completionList != null)
{
Assert.True(completionList.SuggestionModeItem == null, "group.Builder == " + (completionList.SuggestionModeItem != null ? completionList.SuggestionModeItem.DisplayText : "null"));
}
}
}
}
bool TryStartSession(char c, bool isDelete) {
if (HasSession)
return false;
var info = CompletionInfo.Create(textView.TextSnapshot);
if (info == null)
return false;
int pos = textView.Caret.Position.BufferPosition.Position;
var completionTrigger = isDelete ? CompletionTrigger.CreateDeletionTrigger(c) : CompletionTrigger.CreateInsertionTrigger(c);
if (!info.Value.CompletionService.ShouldTriggerCompletion(info.Value.SourceText, pos, completionTrigger))
return false;
StartSession(info, completionTrigger);
return HasSession;
}
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;
}
else
{
// backspace
deletedChar = viewBufferCaretPoint > 0
? textView.TextBuffer.CurrentSnapshot[viewBufferCaretPoint - 1]
: default;
}
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.GetDocumentWithFrozenPartialSemantics(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);
}
}
}
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, filterItems: false, dismissIfEmptyAllowed: true);
}
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.StopModelComputation();
return;
}
else if (model != null)
{
// If we were triggered on backspace/delete, and we're still deleting,
// then we don't want to filter out items (i.e. we still want all items).
// However, we do still want to run the code to figure out what the best
// item is to select from all those items.
FilterToSomeOrAllItems(
filterItems: model.Trigger.Kind != CompletionTriggerKind.Deletion,
dismissIfEmptyAllowed: true,
filterReason: CompletionFilterReason.BackspaceOrDelete);
}
}
}
