Pass a project when creating an invisible editor

src/VisualStudio/Core/Def/Implementation/FindReferences/VisualStudioDefinitionsAndReferencesFactory.cs

@@ -64,7 +64,7 @@ public VisualStudioDefinitionsAndReferencesFactory(SVsServiceProvider servicePro
         private string GetSourceLine(string filePath, int lineNumber)
         {
             using (var invisibleEditor = new InvisibleEditor(
-                _serviceProvider, filePath, needsSave: false, needsUndoDisabled: false))
+                _serviceProvider, filePath, projectOpt: null, needsSave: false, needsUndoDisabled: false))
             {
                 var vsTextLines = invisibleEditor.VsTextLines;
                 if (vsTextLines != null &&

src/VisualStudio/Core/Def/Implementation/ProjectSystem/InvisibleEditor.cs

@@ -28,15 +28,16 @@ internal partial class InvisibleEditor : IInvisibleEditor
         private OLE.Interop.IOleUndoManager _manager;
         private readonly bool _needsUndoRestored;
 
-        public InvisibleEditor(IServiceProvider serviceProvider, string filePath, bool needsSave, bool needsUndoDisabled)
+        public InvisibleEditor(IServiceProvider serviceProvider, string filePath, IVisualStudioHostProject projectOpt, bool needsSave, bool needsUndoDisabled)
         {
             _serviceProvider = serviceProvider;
             _filePath = filePath;
             _needsSave = needsSave;
 
             var invisibleEditorManager = (IIntPtrReturningVsInvisibleEditorManager)serviceProvider.GetService(typeof(SVsInvisibleEditorManager));
+            var vsProject = projectOpt?.Hierarchy as IVsProject;
             var invisibleEditorPtr = IntPtr.Zero;
-            Marshal.ThrowExceptionForHR(invisibleEditorManager.RegisterInvisibleEditor(filePath, null, 0, null, out invisibleEditorPtr));
+            Marshal.ThrowExceptionForHR(invisibleEditorManager.RegisterInvisibleEditor(filePath, vsProject, 0, null, out invisibleEditorPtr));
 
             try
             {

src/VisualStudio/Core/Impl/CodeModel/TextManagerAdapter.cs

@@ -17,7 +17,7 @@ public EnvDTE.TextPoint CreateTextPoint(FileCodeModel fileCodeModel, VirtualTree
                 return null;
             }
 
-            using (var invisibleEditor = new InvisibleEditor(fileCodeModel.ServiceProvider, hostDocument.FilePath, needsSave: false, needsUndoDisabled: false))
+            using (var invisibleEditor = new InvisibleEditor(fileCodeModel.ServiceProvider, hostDocument.FilePath, hostDocument.Project, needsSave: false, needsUndoDisabled: false))
             {
                 var vsTextLines = invisibleEditor.VsTextLines;
 

src/VisualStudio/Core/Impl/RoslynVisualStudioWorkspace.cs

@@ -143,7 +143,7 @@ internal override IInvisibleEditor OpenInvisibleEditor(IVisualStudioHostDocument
                 }
             }
 
-            return new InvisibleEditor(DeferredState.ServiceProvider, hostDocument.FilePath, needsSave, needsUndoDisabled);
+            return new InvisibleEditor(DeferredState.ServiceProvider, hostDocument.FilePath, hostDocument.Project, needsSave, needsUndoDisabled);
         }
 
         private static bool TryResolveSymbol(ISymbol symbol, Project project, CancellationToken cancellationToken, out ISymbol resolvedSymbol, out Project resolvedProject)