Do not show progress bar for asset indexing for projects without assets

Author: krasnotsvetov

resharper/resharper-unity/src/Feature/Caches/DeferredCacheController.cs

@@ -76,7 +76,13 @@ private void ScheduleBackgroundActivity()
             myShellLocks.Dispatcher.AssertAccess();
             if (myCurrentBackgroundActivityLifetime.IsAlive)
                 return;
-            
+
+            if (!HasDirtyFiles())
+            {
+                myCompletedOnce.Value = true;
+                return;
+            }
+
             myCurrentBackgroundActivityLifetimeDefinition = new LifetimeDefinition(myLifetime);
             myCurrentBackgroundActivityLifetime = myCurrentBackgroundActivityLifetimeDefinition.Lifetime;
 

resharper/resharper-unity/src/Feature/Caches/DeferredHelperCache.cs

@@ -82,7 +82,10 @@ public void Merge(IPsiSourceFile sourceFile, object builtPart)
         public void Drop(IPsiSourceFile sourceFile)
         {
             DropFromProcess(sourceFile);
-            FilesToDrop.Add(sourceFile);
+            
+            bool isApplicable = myCaches.Any(t => t.IsApplicable(sourceFile));
+            if (isApplicable)
+                FilesToDrop.Add(sourceFile);
         }
 
         public void OnPsiChange(ITreeNode elementContainingChanges, PsiChangedElementType type)