JBR-2412 [windows] mouse listener does not work for jcef

added regression test

(cherry picked from commit d1479872f2)

test/jdk/jb/java/jcef/MouseEventTest.java

@@ -0,0 +1,158 @@
+// Copyright 2000-2020 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.
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * @test
+ * @key headful
+ * @summary Regression test for JBR-2412. The test checks that mouse actions are handled on jcef browser after hide and show it.
+ * @run main/othervm MouseEventTest
+ */
+
+public class MouseEventTest {
+    private static Robot robot;
+    private static final int WIDTH = 400;
+    private static final int HEIGHT = 400;
+    private static CefBrowserFrame browserFrame = new CefBrowserFrame(WIDTH, HEIGHT);
+
+    public static void main(String[] args) throws InvocationTargetException, InterruptedException {
+
+        try {
+            robot = new Robot();
+            SwingUtilities.invokeAndWait(browserFrame::initUI);
+            robot.waitForIdle();
+
+            doMouseActions();
+            if (!browserFrame.isMouseActionPerformed()) {
+                throw new RuntimeException("Test FAILED. Some of mouse actions were not handled.");
+
+            }
+
+            browserFrame.resetMouseActionsPerformedFlag();
+            browserFrame.hideAndShowBrowser();
+            robot.delay(100);
+
+            doMouseActions();
+            if (!browserFrame.isMouseActionPerformed()) {
+                throw new RuntimeException("Test FAILED. Some of mouse actions were not handled.");
+            }
+            System.out.println("Test PASSED");
+        } catch (AWTException e) {
+            e.printStackTrace();
+        } finally {
+            browserFrame.getBrowser().dispose();
+            JBCefApp.getInstance().getCefApp().dispose();
+            SwingUtilities.invokeAndWait(browserFrame::dispose);
+        }
+    }
+
+    private static void doMouseActions() {
+        Point frameCenter = new Point(browserFrame.getLocationOnScreen().x + WIDTH /2,
+                browserFrame.getLocationOnScreen().y + HEIGHT /2);
+        robot.mouseMove(frameCenter.x, frameCenter.y);
+        robot.delay(100);
+        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+        robot.delay(100);
+        robot.mouseMove(frameCenter.x + 1, frameCenter.y);
+        robot.delay(100);
+        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+        robot.delay(100);
+        robot.mouseWheel(1);
+        robot.delay(100);
+
+    }
+}
+
+
+class CefBrowserFrame extends JFrame {
+    private final JBCefBrowser browser = new JBCefBrowser();
+    private final int width, height;
+    private volatile boolean mouseActionPerformed = false;
+
+    private MouseAdapter mouseAdapter = new MouseAdapter() {
+        @Override
+        public void mouseDragged(MouseEvent e) {
+            mouseActionPerformed = true;
+            System.out.println("mouseDragged");
+        }
+
+        @Override
+        public void mouseMoved(MouseEvent e) {
+            mouseActionPerformed = true;
+            System.out.println("mouseMoved");
+        }
+
+        @Override
+        public void mouseWheelMoved(MouseWheelEvent e) {
+            mouseActionPerformed = true;
+            System.out.println("mouseWheelMoved");
+        }
+
+        @Override
+        public void mouseClicked(MouseEvent e) {
+            mouseActionPerformed = true;
+            System.out.println("mouseClicked");
+        }
+
+        @Override
+        public void mousePressed(MouseEvent e) {
+            mouseActionPerformed = true;
+            System.out.println("mousePressed");
+        }
+
+        @Override
+        public void mouseReleased(MouseEvent e) {
+            mouseActionPerformed = true;
+            System.out.println("mouseReleased");
+        }
+
+        @Override
+        public void mouseEntered(MouseEvent e) {
+            mouseActionPerformed = true;
+            System.out.println("mouseEntered");
+        }
+    };
+
+    public CefBrowserFrame(int width, int height) {
+        this.width = width;
+        this.height = height;
+    }
+
+    public void initUI() {
+        browser.getComponent().addMouseMotionListener(mouseAdapter);
+        browser.getComponent().addMouseListener(mouseAdapter);
+        browser.getComponent().addMouseWheelListener(mouseAdapter);
+
+        getContentPane().add(browser.getCefBrowser().getUIComponent());
+        setSize(width, height);
+        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosed(WindowEvent e) {
+                browser.dispose();
+            }
+        });
+        setVisible(true);
+    }
+
+    public void hideAndShowBrowser() {
+        Container parent = browser.getComponent().getParent();
+        parent.remove(browser.getComponent());
+        SwingUtilities.invokeLater(() -> parent.add(browser.getComponent()));
+    }
+
+    public JBCefBrowser getBrowser() {
+        return browser;
+    }
+
+    public void resetMouseActionsPerformedFlag() {
+        mouseActionPerformed = false;
+    }
+
+    public boolean isMouseActionPerformed() {
+        return mouseActionPerformed;
+    }
+}