don't hide completion parameter hints on nested completion

java/java-tests/testSrc/com/intellij/codeInsight/completion/CompletionHintsTest.java

@@ -122,6 +122,18 @@ public class CompletionHintsTest extends LightFixtureCompletionTestCase {
                                     "}");
   }
 
+  public void testNestedCompletion() {
+    myFixture.configureByText(JavaFileType.INSTANCE, "class C { void m() { System.setPro<caret> } }");
+    complete("setProperty");
+    myFixture.doHighlighting();
+    myFixture.checkResultWithInlays("class C { void m() { System.setProperty(<hint text=\"key:\"/>, <hint text=\"value:\"/>) } }");
+    myFixture.type("System.getPro");
+    complete("getProperty(String key, String def)");
+    myFixture.doHighlighting();
+    myFixture.checkResultWithInlays("class C { void m() { System.setProperty(<hint text=\"key:\"/>System.getProperty(<hint text=\"key:\"/>, <hint text=\"def:\"/>), <hint text=\"value:\"/>) } }");
+    myFixture.checkResult("class C { void m() { System.setProperty(System.getProperty(<caret>, ), ) } }");
+  }
+
   private void showParameterInfo() {
     myFixture.performEditorAction("ParameterInfo");
     UIUtil.dispatchAllInvocationEvents();

platform/lang-impl/src/com/intellij/codeInsight/hint/ParameterInfoController.java

@@ -219,11 +219,16 @@ public class ParameterInfoController implements Disposable {
   }
 
   private void adjustPositionForLookup(@NotNull Lookup lookup) {
-    if (!myHint.isVisible() || myEditor.isDisposed()) {
+    if (myEditor.isDisposed()) {
       Disposer.dispose(this);
       return;
     }
 
+    if (!myHint.isVisible()) {
+      if (!myKeepOnHintHidden) Disposer.dispose(this);
+      return;
+    }
+
     IdeTooltip tooltip = myHint.getCurrentIdeTooltip();
     if (tooltip != null) {
       JRootPane root = myEditor.getComponent().getRootPane();