[groovy] fix collecting outers for anonymous classes (IDEA-190433)

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/resolve/GrCodeReferenceResolver.kt

@@ -233,11 +233,18 @@ private fun GrCodeReferenceElement.getActualParent(): PsiElement? = containingFi
  * @see org.codehaus.groovy.control.ResolveVisitor.currentClass
  */
 private fun PsiElement.getCurrentClass(): GrTypeDefinition? {
-  var contexts = contexts().filterIsInstance<GrTypeDefinition>()
-  if (context is GrAnonymousClassDefinition) {
-    contexts = contexts.drop(1)
+  for (context in contexts()) {
+    if (context !is GrTypeDefinition) {
+      continue
+    }
+    else if (context is GrAnonymousClassDefinition && this === context.baseClassReferenceGroovy) {
+      continue
+    }
+    else {
+      return context
+    }
   }
-  return contexts.firstOrNull()
+  return null
 }
 
 private fun PsiFile?.skipDummies(): PsiFile? {

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/resolve/inners.kt

@@ -1,4 +1,4 @@
-// Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 @file:Suppress("LoopToCallChain", "UseExpressionBody", "LiftReturnOrAssignment")
 
 package org.jetbrains.plugins.groovy.lang.resolve
@@ -9,7 +9,7 @@ import com.intellij.psi.PsiElement
 import com.intellij.psi.ResolveState
 import com.intellij.psi.impl.PsiFileEx
 import com.intellij.psi.scope.PsiScopeProcessor
-import com.intellij.util.SmartList
+import com.intellij.psi.util.parentsOfType
 import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.modifiers.annotation.GrAnnotation
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrTypeDefinition
 import org.jetbrains.plugins.groovy.lang.psi.util.GrClassImplUtil
@@ -111,13 +111,7 @@ internal fun GrTypeDefinition.processInnersInOutersNoCache(processor: PsiScopePr
 }
 
 private fun GrTypeDefinition.collectOuterClasses(): List<GrTypeDefinition> {
-  val result = SmartList<GrTypeDefinition>()
-  var current: GrTypeDefinition? = containingClass as? GrTypeDefinition
-  while (current != null) {
-    result += current
-    current = current.containingClass as? GrTypeDefinition
-  }
-  return result
+  return parentsOfType<GrTypeDefinition>().drop(1).toList()
 }
 
 private fun useCaches(place: PsiElement): Boolean {

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/resolve/ResolveClassTest.groovy

@@ -639,5 +639,20 @@ println Outer.<caret>Inner
 ''', PsiClass
   }
 
+  void 'test resolve to inner class of outer class of anonymous class'() {
+    resolveByText '''\
+class Foobar {
+  private static class Quuz {}
+  void foo() {
+    new Runnable() {
+      void run() {
+        new <caret>Quuz()
+      }
+    }
+  }
+}
+''', PsiClass
+  }
+
   private void doTest(String fileName = getTestName(false) + ".groovy") { resolve(fileName, PsiClass) }
 }