JBR-2870 add resression test for JPopupMenu

- verify that the popup menu is usable if overlaps WM's dock panel of the bottom of screen

(cherry picked from commit 962eb42ed2)

test/jdk/jb/javax/swing/JPopupMenu/JPopupMenuOutOfWindowTest.java

@@ -0,0 +1,159 @@
+import javax.swing.JFrame;
+import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JPopupMenu;
+import javax.swing.SwingUtilities;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsEnvironment;
+import java.awt.Insets;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Robot;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.InputEvent;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.Arrays;
+
+/*
+ * @test
+ * @summary Regression test for JBR-2870
+ *          Opening a JPopupMenu that overlaps WM dock panel
+ *           and checks that all menu items are clickable
+ * @run main/othervm JPopupMenuOutOfWindowTest
+ */
+public class JPopupMenuOutOfWindowTest {
+
+    private static JFrame frame;
+    private static JPopupMenu menu;
+    private static final int BUTTONS_COUNT = 10;
+    private static final JMenuItem[] menuItems = new JMenuItem[BUTTONS_COUNT];
+    private static final boolean[] buttonClicked = new boolean[BUTTONS_COUNT];
+
+    public static void main(String... args) throws Exception {
+        Robot robot = new Robot();
+        Arrays.fill(buttonClicked, false);
+
+        try {
+            SwingUtilities.invokeAndWait(JPopupMenuOutOfWindowTest::initUI);
+
+            robot.waitForIdle();
+            Point clickLocation = calculateClickCoordinates(frame);
+            System.out.println("Going to open popup menu at " + clickLocation);
+
+            robot.mouseMove(clickLocation.x, clickLocation.y);
+            robot.mousePress(InputEvent.BUTTON3_DOWN_MASK);
+            robot.mouseRelease(InputEvent.BUTTON3_DOWN_MASK);
+            robot.delay(1000);
+
+            for (int i = 0; i < BUTTONS_COUNT; i++) {
+                JMenuItem item = menuItems[i];
+                System.out.println("Click to menu item " + i);
+                Point location = item.getLocationOnScreen();
+                final int x = location.x + item.getWidth() / 2;
+                final int y = location.y + item.getHeight() / 2;
+                robot.mouseMove(x, y);
+                robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+                robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+                robot.waitForIdle();
+            }
+
+            for (int i = 0; i < BUTTONS_COUNT; i++) {
+                if (!buttonClicked[i]) {
+                    throw new RuntimeException("TEST FAILED: menu item " + i + " didn't receive a click");
+                }
+            }
+            System.out.println("TEST PASSED");
+        } finally {
+            SwingUtilities.invokeAndWait(JPopupMenuOutOfWindowTest::disposeUI);
+        }
+    }
+
+    private static void initUI() {
+        frame = new JFrame();
+        frame.setBounds(calculateWindowBounds());
+
+        JPanel panel = new JPanel() {
+            @Override
+            protected void paintComponent(Graphics g) {
+                Rectangle r = g.getClipBounds();
+                g.setColor(Color.BLUE);
+                g.fillRect(r.x, r.y, r.width, r.height);
+            }
+        };
+
+        panel.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mousePressed(MouseEvent e) {
+                if (e.getButton() == 3) {
+                    toggleMenu(e);
+                }
+            }
+        });
+
+        menu = new JPopupMenu();
+        for (int i = 0; i < BUTTONS_COUNT; i++) {
+            final int buttonNumber = i;
+            final String name = "Item " + buttonNumber;
+            JMenuItem item = new JMenuItem(name);
+            item.addMouseListener(new MouseAdapter() {
+                @Override
+                public void mouseClicked(MouseEvent e) {
+                    System.out.println("Clicked to button " + buttonNumber);
+                    buttonClicked[buttonNumber] = true;
+                }
+            });
+            menu.add(item);
+            menuItems[i] = item;
+        }
+
+        frame.add(menu);
+        frame.setContentPane(panel);
+        frame.setVisible(true);
+    }
+
+    /**
+     * Change visibility of the popup menu.
+     *  Show the menu at the mouse location if it's hidden
+     * @param e MouseEvent
+     */
+    private static void toggleMenu(MouseEvent e) {
+        menu.setLocation(e.getLocationOnScreen().x, e.getLocationOnScreen().y);
+        menu.setVisible(!menu.isShowing());
+    }
+
+    private static Rectangle calculateWindowBounds() {
+        GraphicsConfiguration config = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
+        Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(config);
+        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+
+        final int x = insets.left;
+        final int w = screenSize.width - x - insets.right;
+        final int y = insets.top;
+        final int h = screenSize.height - y - insets.bottom;
+
+        return new Rectangle(x, y, w, h);
+    }
+
+    private static Point calculateClickCoordinates(Window window) {
+        GraphicsConfiguration config = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
+        Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(config);
+        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+
+        final int x = insets.left + (screenSize.height - insets.left - insets.right) / 2;
+        final int y = screenSize.height - insets.bottom - window.getInsets().bottom - 10;
+        return new Point(x, y);
+    }
+
+    private static void disposeUI() {
+        if (frame != null) {
+            frame.setVisible(false);
+            frame.dispose();
+        }
+    }
+
+}