/*
 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
 * 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 * @test
 * @key headful
 * @bug 8041909
 * @summary Test to check JComboBox does not lose its ability to invoke
 * registerd ActionListener in case of exception in ActionListener
 * @run main ActionListenerExceptionTest
 */

import java.awt.AWTEvent;
import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Point;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class ActionListenerExceptionTest {

    static final int TOTAL_MENU_ITEMS = 3;
    private volatile int count = 0;
    private JFrame frame;
    private JComboBox combo;

    private int menuItemHeight = 0;
    private int yPos = 0;
    private Point cbPos = null;
    private Dimension cbSize = null;


    public static void main(String[] args) throws Exception {

        // See EvenQueueProxy class description below.
        EventQueue queue = Toolkit.getDefaultToolkit().getSystemEventQueue();
        queue.push(new EventQueueProxy());

        ActionListenerExceptionTest testObject = new ActionListenerExceptionTest();

        testObject.createGUI();

        testObject.test();

        testObject.disposeGUI();

        if (testObject.getCount() != TOTAL_MENU_ITEMS) {
            throw new RuntimeException("ActionListener is not invoked expected number of times");
        }
    }

    private void createGUI() throws Exception {
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                frame = new JFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                combo = new JComboBox(new String[]{"One", "Two", "Three"});
                combo.addActionListener(new ActionListener() {

                    @Override
                    public void actionPerformed(ActionEvent e) {
                        count++;
                        throw new RuntimeException();
                    }
                });
                combo.setSize(200, 20);
                frame.add(combo);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

            }
        });
    }

    private void disposeGUI() throws Exception {
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                frame.dispose();
            }
        });
    }

    private void test() throws Exception {
        Robot testRobot = new Robot();
        testRobot.delay(200); // delay to make test frame visible on screen

        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                cbPos = combo.getLocationOnScreen();
                cbSize = combo.getSize();
            }
        });

        Point center = new Point((cbPos.x + cbSize.width / 2), (cbPos.y + cbSize.height - 5));
        testRobot.mouseMove(center.x, center.y);
        testRobot.delay(100);

        testRobot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
        testRobot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
        testRobot.delay(500); // delay to make popup visible

        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                Object comp = combo.getUI().getAccessibleChild(combo, 0);
                int i = 0;
                JComponent scrollPane;
                do {
                    scrollPane = (JComponent) ((JPopupMenu) comp).getComponent(i++);
                } while (!(scrollPane instanceof JScrollPane));

                menuItemHeight = scrollPane.getSize().height / TOTAL_MENU_ITEMS;
                yPos = scrollPane.getLocationOnScreen().y + menuItemHeight / 2;
            }
        });

        for (int i = 0; i < TOTAL_MENU_ITEMS; i++) {

            testRobot.mouseMove(center.x, yPos);

            testRobot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
            testRobot.delay(100);
            testRobot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
            testRobot.delay(200);

            yPos += menuItemHeight;
        }

    }

    private int getCount() {
        return count;
    }
}

// Proxy class to invoke dispatchEvent and catch exceptions
//
// This is needed in order to test Exceptions from ActionListener
// Without this, jtreg reports test failure at first exception from ActionListener and
// we cannot test whether ActionListener is invoked again
class EventQueueProxy extends EventQueue {

    protected void dispatchEvent(AWTEvent evt) {
        try {
            super.dispatchEvent(evt);
        } catch (Exception e) {
            System.out.println("Intentionally consumed Exception from ActionListener");
            e.printStackTrace();
        }
    }
}