cancel long autopopup if focus leaves editor

platform/lang-impl/src/com/intellij/codeInsight/completion/CompletionPhase.java

@@ -31,6 +31,8 @@ import com.intellij.openapi.command.CommandProcessor;
 import com.intellij.openapi.editor.*;
 import com.intellij.openapi.editor.actionSystem.TypedAction;
 import com.intellij.openapi.editor.event.*;
+import com.intellij.openapi.editor.ex.EditorEx;
+import com.intellij.openapi.editor.ex.FocusChangeListener;
 import com.intellij.openapi.fileEditor.FileEditorManagerAdapter;
 import com.intellij.openapi.fileEditor.FileEditorManagerEvent;
 import com.intellij.openapi.fileEditor.FileEditorManagerListener;
@@ -177,6 +179,19 @@ public abstract class CompletionPhase implements Disposable {
           }
         }
       }, this);
+      if (indicator.isAutopopupCompletion()) {
+        // lookup is not visible, we have to check ourselves if editor retains focus 
+        ((EditorEx)indicator.getEditor()).addFocusListener(new FocusChangeListener() {
+          @Override
+          public void focusGained(Editor editor) {
+          }
+  
+          @Override
+          public void focusLost(Editor editor) {
+            indicator.closeAndFinish(true);
+          }
+        }, this);
+      }
     }
 
     @Override

platform/lang-impl/src/com/intellij/injected/editor/EditorWindow.java

@@ -21,6 +21,7 @@ import com.intellij.ide.CutProvider;
 import com.intellij.ide.DeleteProvider;
 import com.intellij.ide.PasteProvider;
 import com.intellij.ide.highlighter.HighlighterFactory;
+import com.intellij.openapi.Disposable;
 import com.intellij.openapi.actionSystem.DataContext;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.editor.*;
@@ -628,6 +629,11 @@ public class EditorWindow extends UserDataHolderBase implements EditorEx {
     myDelegate.addFocusListener(listener);
   }
 
+  @Override
+  public void addFocusListener(@NotNull FocusChangeListener listener, Disposable parentDisposable) {
+    myDelegate.addFocusListener(listener, parentDisposable);
+  }
+
   @Override
   public Project getProject() {
     return myDelegate.getProject();

platform/platform-impl/src/com/intellij/openapi/editor/ex/EditorEx.java

@@ -19,6 +19,7 @@ import com.intellij.ide.CopyProvider;
 import com.intellij.ide.CutProvider;
 import com.intellij.ide.DeleteProvider;
 import com.intellij.ide.PasteProvider;
+import com.intellij.openapi.Disposable;
 import com.intellij.openapi.actionSystem.DataContext;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.LogicalPosition;
@@ -105,6 +106,8 @@ public interface EditorEx extends Editor {
   boolean setCaretEnabled(boolean enabled);
 
   void addFocusListener(@NotNull FocusChangeListener listener);
+  
+  void addFocusListener(@NotNull FocusChangeListener listener, Disposable parentDisposable);
 
   void setOneLineMode(boolean b);
 

platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorImpl.java

@@ -4268,6 +4268,11 @@ public final class EditorImpl extends UserDataHolderBase implements EditorEx, Hi
     myFocusListeners.add(listener);
   }
 
+  @Override
+  public void addFocusListener(@NotNull FocusChangeListener listener, Disposable parentDisposable) {
+    ContainerUtil.add(listener, myFocusListeners, parentDisposable);
+  }
+
   @Override
   @Nullable
   public Project getProject() {