Properly formatted tooltips.

src/EditorFeatures/Core/Implementation/IntelliSense/QuickInfo/DeferredContent/ElisionBufferDeferredContent.cs

@@ -25,6 +25,7 @@ internal class ElisionBufferDeferredContent : IDeferredQuickInfoContent
         private readonly ITextEditorFactoryService _textEditorFactoryService;
         private readonly IContentType _contentType;
         private readonly ITextViewRoleSet _roleSet;
+        private readonly Brush _backgroundBrush;
 
         public ElisionBufferDeferredContent(
             SnapshotSpan span,
@@ -32,14 +33,16 @@ internal class ElisionBufferDeferredContent : IDeferredQuickInfoContent
             IEditorOptionsFactoryService editorOptionsFactoryService,
             ITextEditorFactoryService textEditorFactoryService,
             IContentType contentType = null,
-            ITextViewRoleSet roleSet = null)
+            ITextViewRoleSet roleSet = null,
+            Brush backgroundBrush = null)
         {
             _span = span;
             _projectionBufferFactoryService = projectionBufferFactoryService;
             _editorOptionsFactoryService = editorOptionsFactoryService;
             _textEditorFactoryService = textEditorFactoryService;
             _contentType = contentType;
-            _roleSet = roleSet;
+            _roleSet = roleSet ?? _textEditorFactoryService.NoRoles;
+            _backgroundBrush = backgroundBrush ?? Brushes.Transparent;
         }
 
         public ContentControl Create()
@@ -51,11 +54,11 @@ public ContentControl Create()
 
         private IWpfTextView CreateView(ITextBuffer buffer)
         {
-            var view = _textEditorFactoryService.CreateTextView(buffer, 
-                _roleSet ?? _textEditorFactoryService.NoRoles);
+            var view = _textEditorFactoryService.CreateTextView(
+                buffer, _roleSet);
 
             view.SizeToFit();
-            view.Background = Brushes.Transparent;
+            view.Background = _backgroundBrush;
 
             // Zoom out a bit to shrink the text.
             view.ZoomLevel *= 0.75;

src/VisualStudio/Core/Def.Next/FindReferences/StreamingFindReferencesPresenter.ReferenceEntry.cs

@@ -21,6 +21,8 @@
 using Microsoft.CodeAnalysis.Editor.Shared.Preview;
 using Microsoft.CodeAnalysis.Editor.Implementation.ReferenceHighlighting;
 using Microsoft.VisualStudio.Text.Editor;
+using System.Linq;
+using System.Windows.Controls;
 
 namespace Microsoft.VisualStudio.LanguageServices.FindReferences
 {
@@ -100,8 +102,8 @@ private object GetValue(string keyName)
                 case StandardTableKeyNames.Text:
                     return _sourceText.Lines.GetLineFromPosition(SourceSpan.Start).ToString().Trim();
 
-                case StandardTableKeyNames2.TextInlines:
-                    return GetHighlightedInlines(Presenter, _taggedLineParts);
+                //case StandardTableKeyNames2.TextInlines:
+                //    return GetHighlightedInlines(Presenter, _taggedLineParts);
 
                 case StandardTableKeyNames2.DefinitionIcon:
                     return _definitionBucket.DefinitionItem.Tags.GetGlyph().GetImageMoniker();
@@ -113,6 +115,33 @@ private object GetValue(string keyName)
                 return null;
             }
 
+
+            internal bool TryCreateColumnContent(string columnName, out FrameworkElement content)
+            {
+                if (columnName == StandardTableColumnDefinitions2.LineText)
+                {
+                    var inlines = GetHighlightedInlines(Presenter, _taggedLineParts);
+                    var textBlock = inlines.ToTextBlock(Presenter._typeMap);
+
+                    var toolTipContent = CreateToolTipContent();
+                    var toolTip = new ToolTip { Content = toolTipContent };
+                    textBlock.ToolTip = toolTip;
+
+                    var style = Presenter._presenterStyles.FirstOrDefault(s => !string.IsNullOrEmpty(s.QuickInfoAppearanceCategory));
+                    if (style?.BackgroundBrush != null)
+                    {
+                        toolTip.Background = style.BackgroundBrush;
+                    }
+
+                    content = textBlock;
+                    return true;
+                }
+
+                content = null;
+                return false;
+            }
+
+
             private static IList<System.Windows.Documents.Inline> GetHighlightedInlines(
                 StreamingFindReferencesPresenter presenter,
                 TaggedTextAndHighlightSpan taggedTextAndHighlight,
@@ -143,14 +172,14 @@ private object GetValue(string keyName)
                 return inlines;
             }
 
-            internal bool TryCreateToolTip(string columnName, out object toolTip)
-            {
-                Presenter.AssertIsForeground();
+            //internal bool TryCreateToolTip(string columnName, out object toolTip)
+            //{
+            //    Presenter.AssertIsForeground();
 
-                return TryCreateEllision(columnName, out toolTip);
-            }
+            //    return TryCreateEllision(columnName, out toolTip);
+            //}
 
-            private bool TryCreateEllision(string columnName, out object toolTip)
+            private ContentControl CreateToolTipContent()
             {
                 var textBuffer = _context.GetTextBufferForPreview(Document, _sourceText);
 
@@ -164,8 +193,12 @@ private bool TryCreateEllision(string columnName, out object toolTip)
 
                 var contentType = Presenter._contentTypeRegistryService.GetContentType(
                     IProjectionBufferFactoryServiceExtensions.RoslynPreviewContentType);
+
                 var roleSet = Presenter._textEditorFactoryService.CreateTextViewRoleSet(
-                    TextViewRoles.PreviewRole, PredefinedTextViewRoles.Analyzable);
+                    TextViewRoles.PreviewRole,
+                    PredefinedTextViewRoles.Analyzable,
+                    PredefinedTextViewRoles.Document,
+                    PredefinedTextViewRoles.Editable);
 
                 var content = new ElisionBufferDeferredContent(
                     snapshotSpan,
@@ -176,8 +209,8 @@ private bool TryCreateEllision(string columnName, out object toolTip)
                     roleSet);
 
                 var element = content.Create();
-                toolTip = element;
-                return true;
+
+                return element;
             }
 
             private Span GetRegionSpanForReference()

src/VisualStudio/Core/Def.Next/FindReferences/StreamingFindReferencesPresenter.TableEntriesSnapshot.cs

@@ -35,16 +35,16 @@ public override bool TryGetValue(int index, string keyName, out object content)
                 return _referenceEntries[index].TryGetValue(keyName, out content);
             }
 
-            public override bool TryCreateToolTip(int index, string columnName, out object toolTip)
-            {
-                return this._referenceEntries[index].TryCreateToolTip(columnName, out toolTip);
-            }
-
-            //public override bool TryCreateColumnContent(
-            //    int index, string columnName, bool singleColumnView, out FrameworkElement content)
+            //public override bool TryCreateToolTip(int index, string columnName, out object toolTip)
             //{
-            //    return this._referenceEntries[index].TryCreateColumnContent(columnName, out content);
+            //    return this._referenceEntries[index].TryCreateToolTip(columnName, out toolTip);
             //}
+
+            public override bool TryCreateColumnContent(
+                int index, string columnName, bool singleColumnView, out FrameworkElement content)
+            {
+                return this._referenceEntries[index].TryCreateColumnContent(columnName, out content);
+            }
         }
     }
 }
\ No newline at end of file

src/VisualStudio/Core/Def.Next/FindReferences/StreamingFindReferencesPresenter.cs

@@ -12,6 +12,7 @@
 using Microsoft.VisualStudio.Text.Classification;
 using System.Linq;
 using Microsoft.VisualStudio.Utilities;
+using Microsoft.VisualStudio.Language.Intellisense;
 
 namespace Microsoft.VisualStudio.LanguageServices.FindReferences
 {
@@ -37,6 +38,7 @@ internal partial class StreamingFindReferencesPresenter :
         private readonly ClassificationTypeMap _typeMap;
         private readonly IEditorFormatMapService _formatMapService;
         private readonly IFindAllReferencesService _vsFindAllReferencesService;
+        private readonly IEnumerable<QuickInfoPresenterStyle> _presenterStyles;
 
         [ImportingConstructor]
         public StreamingFindReferencesPresenter(
@@ -48,6 +50,7 @@ internal partial class StreamingFindReferencesPresenter :
             IContentTypeRegistryService contentTypeRegistryService,
             ClassificationTypeMap typeMap,
             IEditorFormatMapService formatMapService,
+            [ImportMany] IEnumerable<QuickInfoPresenterStyle> presenterStyles,
             [ImportMany] IEnumerable<Lazy<IAsynchronousOperationListener, FeatureMetadata>> asyncListeners)
         {
             _serviceProvider = serviceProvider;
@@ -59,6 +62,8 @@ internal partial class StreamingFindReferencesPresenter :
             _textEditorFactoryService = textEditorFactoryService;
             _typeMap = typeMap;
             _formatMapService = formatMapService;
+            _presenterStyles = presenterStyles;
+
             _asyncListener = new AggregateAsynchronousOperationListener(
                 asyncListeners, FeatureAttribute.ReferenceHighlighting);