jdk-24/test/jdk/javax/swing/text/DefaultCaret/HidingSelection/HidingSelectionTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 */

import javax.swing.*;
import java.awt.*;
import java.awt.event.InputEvent;
import java.awt.image.BufferedImage;

/**
 * @test
 * @bug 8188081
 * @summary  Text selection does not clear after focus is lost
 * @run main HidingSelectionTest
 */

public class HidingSelectionTest {

    private static JTextField field1;
    private static JTextField field2;
    private static JFrame frame;
    private static Rectangle bounds;
    private static JMenu menu;
    private static JTextField anotherWindow;
    private static Point menuLoc;
    private static JFrame frame2;

    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeAndWait(() -> {
            frame = new JFrame();
            field1 = new JTextField("field1                       ");
            field2 = new JTextField("field2                       ");
            field1.setEditable(false);
            field2.setEditable(false);
            frame.getContentPane().setLayout(new FlowLayout());
            frame.getContentPane().add(field1);
            frame.getContentPane().add(field2);
            JMenuBar menuBar = new JMenuBar();
            menu = new JMenu("menu");
            menu.add(new JMenuItem("item"));
            menuBar.add(menu);
            frame.setJMenuBar(menuBar);
            frame.pack();
            frame.setVisible(true);
        });

        Robot robot = new Robot();
        robot.waitForIdle();
        robot.delay(200);
        SwingUtilities.invokeAndWait(() -> {
            bounds = field2.getBounds();
            bounds.setLocation(field2.getLocationOnScreen());
        });
        BufferedImage nosel = robot.createScreenCapture(bounds);

        SwingUtilities.invokeAndWait(field2::requestFocus);
        SwingUtilities.invokeAndWait(field2::selectAll);
        robot.waitForIdle();
        robot.delay(200);
        BufferedImage sel = robot.createScreenCapture(bounds);

        SwingUtilities.invokeAndWait(() -> {
            menuLoc = menu.getLocationOnScreen();
            menuLoc.translate(10, 10);
        });
        robot.mouseMove(menuLoc.x, menuLoc.y);
        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
        robot.delay(50);
        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
        robot.waitForIdle();
        robot.delay(200);
        if (!biEqual(robot.createScreenCapture(bounds), sel)) {
            throw new RuntimeException("Test fails: menu hides selection");
        }

        SwingUtilities.invokeAndWait(
                      MenuSelectionManager.defaultManager()::clearSelectedPath);
        SwingUtilities.invokeAndWait(field1::requestFocus);
        robot.waitForIdle();
        robot.delay(200);
        if (!biEqual(robot.createScreenCapture(bounds), nosel)) {
            throw new RuntimeException(
                    "Test fails: focus lost doesn't hide selection");
        }

        SwingUtilities.invokeAndWait(field2::requestFocus);
        robot.waitForIdle();
        SwingUtilities.invokeAndWait(() ->{
            frame2 = new JFrame();
            Point loc = frame.getLocationOnScreen();
            loc.translate(0, frame.getHeight());
            frame2.setLocation(loc);
            anotherWindow = new JTextField("textField3");
            frame2.add(anotherWindow);
            frame2.pack();
            frame2.setVisible(true);
        });
        robot.waitForIdle();
        SwingUtilities.invokeAndWait(anotherWindow::requestFocus);
        robot.waitForIdle();
        robot.delay(200);
        if (biEqual(robot.createScreenCapture(bounds), nosel)) {
            throw new RuntimeException(
                    "Test fails: switch window hides selection");
        }

        SwingUtilities.invokeAndWait(anotherWindow::selectAll);
        robot.waitForIdle();
        robot.delay(200);
        if (biEqual(robot.createScreenCapture(bounds), sel)) {
            throw new RuntimeException(
                "Test fails: selection ownership is lost selection is shown");
        }

        SwingUtilities.invokeLater(frame2::dispose);
        SwingUtilities.invokeLater(frame::dispose);
    }

    static boolean biEqual(BufferedImage i1, BufferedImage i2) {
        if (i1.getWidth() == i2.getWidth() &&
                                         i1.getHeight() == i2.getHeight()) {
            for (int x = 0; x < i1.getWidth(); x++) {
                for (int y = 0; y < i1.getHeight(); y++) {
                    if (i1.getRGB(x, y) != i2.getRGB(x, y)) {
                        return false;
                    }
                }
            }
            return true;
        }
        return false;
    }
}