public static ImmutableArray <string> GetClassificationsForSpan(IWpfTextView view, Span span)
{
ThreadHelper.ThrowIfNotOnUIThread();
// If the cursor is after the last character return empty array.
if (span.Start == view.TextBuffer.CurrentSnapshot.Length)
{
return(ImmutableArray <string> .Empty);
}
// The span to classify must have a length.
var snapshotSpan = span.Length == 0
? new SnapshotSpan(view.TextSnapshot, span.Start, 1)
: new SnapshotSpan(view.TextSnapshot, span);
var classificationService = VSServiceHelpers.GetMefExport <IClassifierAggregatorService>();
var classifier = (IAccurateClassifier)classificationService.GetClassifier(view.TextBuffer);
var classifiedSpans = classifier.GetAllClassificationSpans(snapshotSpan, CancellationToken.None);
var classifications = ImmutableArray.CreateBuilder <string>();
foreach (var classifiedSpan in classifiedSpans)
{
CollectClassifications(classifiedSpan.ClassificationType, classifications);
}
return(classifications.ToImmutable());
/// <summary>
/// Initializes a new instance of the <see cref="MainWindowControl"/> class.
/// </summary>
public MainWindowControl()
{
DataContext = _viewModel = new MainWindowControlViewModel();
InitializeComponent();
_activeWindowTracker = new ActiveWindowTracker();
_activeWindowTracker.PropertyChanged += ActiveWindowPropertyChanged;
var editorFormatMapService = VSServiceHelpers.GetMefExport <IEditorFormatMapService>();
var editorFormatMap = editorFormatMapService.GetEditorFormatMap("text");
editorFormatMap.FormatMappingChanged += (object s, FormatItemsEventArgs e) => UpdateClassifications(e.ChangedItems);
void UpdateClassifications(ReadOnlyCollection <string> definitionNames)
{
_viewModel.OnThemeChanged(definitionNames.ToLookup(name => name));
}
}
