private async ValueTask <DifferenceViewerPreview> CreateNewDifferenceViewerAsync(
PreviewWorkspace?leftWorkspace, PreviewWorkspace?rightWorkspace,
IProjectionBuffer originalBuffer, IProjectionBuffer changedBuffer,
double zoomLevel, CancellationToken cancellationToken)
{
// IWpfDifferenceViewerFactoryService is a Visual Studio API which is not documented as free-threaded
await ThreadingContext.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
// leftWorkspace can be null if the change is adding a document.
// rightWorkspace can be null if the change is removing a document.
// However both leftWorkspace and rightWorkspace can't be null at the same time.
Contract.ThrowIfTrue((leftWorkspace == null) && (rightWorkspace == null));
var diffBuffer = _differenceBufferService.CreateDifferenceBuffer(
originalBuffer, changedBuffer,
new StringDifferenceOptions(), disableEditing: true);
var mode = leftWorkspace == null ? DifferenceViewMode.RightViewOnly :
rightWorkspace == null ? DifferenceViewMode.LeftViewOnly :
DifferenceViewMode.Inline;
var diffViewer = await CreateDifferenceViewAsync(diffBuffer, _previewRoleSet, mode, zoomLevel, cancellationToken).ConfigureAwait(true);
diffViewer.Closed += (s, e) =>
{
// Workaround Editor bug. The editor has an issue where they sometimes crash when
// trying to apply changes to projection buffer. So, when the user actually invokes
// a SuggestedAction we may then edit a text buffer, which the editor will then
// try to propagate through the projections we have here over that buffer. To ensure
// that that doesn't happen, we clear out the projections first so that this crash
// won't happen.
originalBuffer.DeleteSpans(0, originalBuffer.CurrentSnapshot.SpanCount);
changedBuffer.DeleteSpans(0, changedBuffer.CurrentSnapshot.SpanCount);
leftWorkspace?.Dispose();
leftWorkspace = null;
rightWorkspace?.Dispose();
rightWorkspace = null;
};
if (_globalOptions.GetOption(SolutionCrawlerRegistrationService.EnableSolutionCrawler))
{
leftWorkspace?.EnableSolutionCrawler();
rightWorkspace?.EnableSolutionCrawler();
}
return(new DifferenceViewerPreview(diffViewer));
}
public async Task TestPreviewDiagnostic()
{
var hostServices = EditorTestCompositions.EditorFeatures.GetHostServices();
var exportProvider = (IMefHostExportProvider)hostServices;
var diagnosticService = (IDiagnosticUpdateSource)exportProvider.GetExportedValue <IDiagnosticAnalyzerService>();
RoslynDebug.AssertNotNull(diagnosticService);
var globalOptions = exportProvider.GetExportedValue <IGlobalOptionService>();
var taskSource = new TaskCompletionSource <DiagnosticsUpdatedArgs>();
diagnosticService.DiagnosticsUpdated += (s, a) => taskSource.TrySetResult(a);
using var previewWorkspace = new PreviewWorkspace(hostServices);
var solution = previewWorkspace.CurrentSolution
.WithAnalyzerReferences(new[] { DiagnosticExtensions.GetCompilerDiagnosticAnalyzerReference(LanguageNames.CSharp) })
.AddProject("project", "project.dll", LanguageNames.CSharp)
.AddDocument("document", "class { }")
.Project
.Solution;
Assert.True(previewWorkspace.TryApplyChanges(solution));
var document = previewWorkspace.CurrentSolution.Projects.First().Documents.Single();
previewWorkspace.OpenDocument(document.Id, (await document.GetTextAsync()).Container);
previewWorkspace.EnableSolutionCrawler();
// wait 20 seconds
taskSource.Task.Wait(20000);
Assert.True(taskSource.Task.IsCompleted);
var args = taskSource.Task.Result;
Assert.True(args.GetPushDiagnostics(globalOptions, InternalDiagnosticsOptions.NormalDiagnosticMode).Length > 0);
}
public async Task TestPreviewDiagnosticTagger()
{
using var workspace = TestWorkspace.CreateCSharp("class { }", composition: EditorTestCompositions.EditorFeatures);
using var previewWorkspace = new PreviewWorkspace(workspace.CurrentSolution);
// preview workspace and owner of the solution now share solution and its underlying text buffer
var hostDocument = workspace.Projects.First().Documents.First();
previewWorkspace.TryApplyChanges(previewWorkspace.CurrentSolution.WithAnalyzerReferences(new[] { DiagnosticExtensions.GetCompilerDiagnosticAnalyzerReference(LanguageNames.CSharp) }));
// enable preview diagnostics
previewWorkspace.EnableSolutionCrawler();
var diagnosticsAndErrorsSpans = await SquiggleUtilities.GetDiagnosticsAndErrorSpansAsync <DiagnosticsSquiggleTaggerProvider, IErrorTag>(workspace);
const string AnalyzerCount = "Analyzer Count: ";
Assert.Equal(AnalyzerCount + 1, AnalyzerCount + diagnosticsAndErrorsSpans.Item1.Length);
const string SquigglesCount = "Squiggles Count: ";
Assert.Equal(SquigglesCount + 1, SquigglesCount + diagnosticsAndErrorsSpans.Item2.Length);
}
