/*

 * Copyright (c) 2006, 2014, 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.

 */

package test.java.awt.regtesthelpers;

/**

 * <p>This class contains utilities useful for regression testing.

 * <p>When using jtreg you would include this class into the build

 * list via something like:

 * <pre>

     @library ../../../regtesthelpers

     @build Util

     @run main YourTest

   </pre>

 * Note that if you are about to create a test based on

 * Applet-template, then put those lines into html-file, not in java-file.

 * <p> And put an

 * import test.java.awt.regtesthelpers.Util;

 * into the java source of test.

*/

import java.awt.Component;

import java.awt.Frame;

import java.awt.Dialog;

import java.awt.Window;

import java.awt.Button;

import java.awt.Point;

import java.awt.Dimension;

import java.awt.Rectangle;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.IllegalComponentStateException;

import java.awt.AWTException;

import java.awt.AWTEvent;

import java.awt.Color;

import java.awt.event.InputEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.event.ActionEvent;

import java.awt.event.FocusEvent;

import java.awt.event.WindowListener;

import java.awt.event.WindowFocusListener;

import java.awt.event.FocusListener;

import java.awt.event.ActionListener;

import java.lang.reflect.Constructor;

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.security.PrivilegedAction;

import java.security.AccessController;

import java.util.concurrent.atomic.AtomicBoolean;

public final class Util {

    private Util() {} // this is a helper class with static methods :)

    /*

     * @throws RuntimeException when creation failed

     */

    public static Robot createRobot() {

        try {

        } catch (AWTException e) {

            throw new RuntimeException("Error: unable to create robot", e);

        }

    }

    /**

     * Makes the window visible and waits until it's shown.

     */

    public static void showWindowWait(Window win) {

        win.setVisible(true);

        waitTillShown(win);

    }

    /**

     * Moves mouse pointer in the center of given {@code comp} component

     * using {@code robot} parameter.

     */

    public static void pointOnComp(final Component comp, final Robot robot) {

        Rectangle bounds = new Rectangle(comp.getLocationOnScreen(), comp.getSize());

        robot.mouseMove(bounds.x + bounds.width / 2, bounds.y + bounds.height / 2);

    }

    /**

     * Moves mouse pointer in the center of a given {@code comp} component

     * and performs a left mouse button click using the {@code robot} parameter

     * with the {@code delay} delay between press and release.

     */

    public static void clickOnComp(final Component comp, final Robot robot, int delay) {

        pointOnComp(comp, robot);

        robot.delay(delay);

        robot.mousePress(InputEvent.BUTTON1_MASK);

        robot.delay(delay);

        robot.mouseRelease(InputEvent.BUTTON1_MASK);

    }

    /**

     * Moves mouse pointer in the center of a given {@code comp} component

     * and performs a left mouse button click using the {@code robot} parameter

     * with the default delay between press and release.

     */

    public static void clickOnComp(final Component comp, final Robot robot) {

        clickOnComp(comp, robot, 50);

    }

    public static Point getTitlePoint(Window decoratedWindow) {

        Point p = decoratedWindow.getLocationOnScreen();

        Dimension d = decoratedWindow.getSize();

        return new Point(p.x + (int)(d.getWidth()/2),

                         p.y + (int)(decoratedWindow.getInsets().top/2));

    }

    /*

     * Clicks on a title of Frame/Dialog.

     * WARNING: it may fail on some platforms when the window is not wide enough.

     */

    public static void clickOnTitle(final Window decoratedWindow, final Robot robot) {

        if (decoratedWindow instanceof Frame || decoratedWindow instanceof Dialog) {

            Point p = getTitlePoint(decoratedWindow);

            robot.mouseMove(p.x, p.y);

            robot.delay(50);

            robot.mousePress(InputEvent.BUTTON1_MASK);

            robot.delay(50);

            robot.mouseRelease(InputEvent.BUTTON1_MASK);

        }

    }

    /**

     * Tests whether screen pixel has the expected color performing several

     * attempts. This method is useful for asynchronous window manager where

     * it's impossible to determine when drawing actually takes place.

     *

     * @param x X position of pixel

     * @param y Y position of pixel

     * @param color expected color

     * @param attempts number of attempts to undertake

     * @param delay delay before each attempt

     * @param robot a robot to use for retrieving pixel color

     * @return true if pixel color matches the color expected, otherwise false

     */

    public static boolean testPixelColor(int x, int y, final Color color, int attempts, int delay, final Robot robot) {

        while (attempts-- > 0) {

            robot.delay(delay);

            Color screen = robot.getPixelColor(x, y);

            if (screen.equals(color)) {

                return true;

            }

        }

        return false;

    }

    /**

     * Tests whether the area within boundaries has the expected color

     * performing several attempts. This method is useful for asynchronous

     * window manager where it's impossible to determine when drawing actually

     * takes place.

     *

     * @param bounds position of area

     * @param color expected color

     * @param attempts number of attempts to undertake

     * @param delay delay before each attempt

     * @param robot a robot to use for retrieving pixel color

     * @return true if area color matches the color expected, otherwise false

     */

    public static boolean testBoundsColor(final Rectangle bounds, final Color color, int attempts, int delay, final Robot robot) {

        int right = bounds.x + bounds.width - 1;

        int bottom = bounds.y + bounds.height - 1;

        while (attempts-- > 0) {

            if (testPixelColor(bounds.x, bounds.y, color, 1, delay, robot)

                && testPixelColor(right, bounds.y, color, 1, 0, robot)

                && testPixelColor(right, bottom, color, 1, 0, robot)

                && testPixelColor(bounds.x, bottom, color, 1, 0, robot)) {

                return true;

            }

        }

        return false;

    }

        robot.waitForIdle();

    }

    public static Field getField(final Class klass, final String fieldName) {

        return AccessController.doPrivileged(new PrivilegedAction<Field>() {

            public Field run() {

                try {

                    Field field = klass.getDeclaredField(fieldName);

                    assert (field != null);

                    field.setAccessible(true);

                    return field;

                } catch (SecurityException se) {

                    throw new RuntimeException("Error: unexpected exception caught!", se);

                } catch (NoSuchFieldException nsfe) {

                    throw new RuntimeException("Error: unexpected exception caught!", nsfe);

                }

            }

        });

    }

    /*

     * Waits for a notification and for a boolean condition to become true.

     * The method returns when the above conditions are fullfilled or when the timeout

     * occurs.

     *

     * @param condition the object to be notified and the booelan condition to wait for

     * @param timeout the maximum time to wait in milliseconds

     * @param catchExceptions if {@code true} the method catches InterruptedException

     * @return the final boolean value of the {@code condition}

     * @throws InterruptedException if the awaiting proccess has been interrupted

     */

    public static boolean waitForConditionEx(final AtomicBoolean condition, long timeout)

      throws InterruptedException

        {

            synchronized (condition) {

                long startTime = System.currentTimeMillis();

                while (!condition.get()) {

                    condition.wait(timeout);

                    if (System.currentTimeMillis() - startTime >= timeout ) {

                        break;

                    }

                }

            }

            return condition.get();

        }

    /*

     * The same as {@code waitForConditionEx(AtomicBoolean, long)} except that it

     * doesn't throw InterruptedException.

     */

    public static boolean waitForCondition(final AtomicBoolean condition, long timeout) {

        try {

            return waitForConditionEx(condition, timeout);

        } catch (InterruptedException e) {

            throw new RuntimeException("Error: unexpected exception caught!", e);

        }

    }

    /*

     * The same as {@code waitForConditionEx(AtomicBoolean, long)} but without a timeout.

     */

    public static void waitForConditionEx(final AtomicBoolean condition)

      throws InterruptedException

        {

            synchronized (condition) {

                while (!condition.get()) {

                    condition.wait();

                }

            }

        }

    /*

     * The same as {@code waitForConditionEx(AtomicBoolean)} except that it

     * doesn't throw InterruptedException.

     */

    public static void waitForCondition(final AtomicBoolean condition) {

        try {

            waitForConditionEx(condition);

        } catch (InterruptedException e) {

            throw new RuntimeException("Error: unexpected exception caught!", e);

        }

    }

    public static void waitTillShownEx(final Component comp) throws InterruptedException {

        while (true) {

            try {

                Thread.sleep(100);

                comp.getLocationOnScreen();

                break;

            } catch (IllegalComponentStateException e) {}

        }

    }

    public static void waitTillShown(final Component comp) {

        try {

            waitTillShownEx(comp);

        } catch (InterruptedException e) {

            throw new RuntimeException("Error: unexpected exception caught!", e);

        }

    }

    /**

     * Drags from one point to another with the specified mouse button pressed.

     *

     * @param robot a robot to use for moving the mouse, etc.

     * @param startPoint a start point of the drag

     * @param endPoint an end point of the drag

     * @param button one of {@code InputEvent.BUTTON1_MASK},

     *     {@code InputEvent.BUTTON2_MASK}, {@code InputEvent.BUTTON3_MASK}

     *

     * @throws IllegalArgumentException if {@code button} is not one of

     *     {@code InputEvent.BUTTON1_MASK}, {@code InputEvent.BUTTON2_MASK},

     *     {@code InputEvent.BUTTON3_MASK}

     */

    public static void drag(Robot robot, Point startPoint, Point endPoint, int button) {

        if (!(button == InputEvent.BUTTON1_MASK || button == InputEvent.BUTTON2_MASK

                || button == InputEvent.BUTTON3_MASK))

        {

            throw new IllegalArgumentException("invalid mouse button");

        }

        robot.mouseMove(startPoint.x, startPoint.y);

        robot.mousePress(button);

        try {

            mouseMove(robot, startPoint, endPoint);

        } finally {

            robot.mouseRelease(button);

        }

    }

    /**

     * Moves the mouse pointer from one point to another.

     * Uses Bresenham's algorithm.

     *

     * @param robot a robot to use for moving the mouse

     * @param startPoint a start point of the drag

     * @param endPoint an end point of the drag

     */

    public static void mouseMove(Robot robot, Point startPoint, Point endPoint) {

        int dx = endPoint.x - startPoint.x;

        int dy = endPoint.y - startPoint.y;

        int ax = Math.abs(dx) * 2;

        int ay = Math.abs(dy) * 2;

        int sx = signWOZero(dx);

        int sy = signWOZero(dy);

        int x = startPoint.x;

        int y = startPoint.y;

        int d = 0;

        if (ax > ay) {

            d = ay - ax/2;

            while (true){

                robot.mouseMove(x, y);

                robot.delay(50);

                if (x == endPoint.x){

                    return;

                }

                if (d >= 0){

                    y = y + sy;

                    d = d - ax;

                }

                x = x + sx;

                d = d + ay;

            }

        } else {

            d = ax - ay/2;

            while (true){

                robot.mouseMove(x, y);

                robot.delay(50);

                if (y == endPoint.y){

                    return;

                }

                if (d >= 0){

                    x = x + sx;

                    d = d - ay;

                }

                y = y + sy;

                d = d + ax;

            }

        }

    }

    private static int signWOZero(int i){

        return (i > 0)? 1: -1;

    }

    private static int sign(int n) {

        return n < 0 ? -1 : n == 0 ? 0 : 1;

    }

    /** Returns {@code WindowListener} instance that diposes {@code Window} on

     *  "window closing" event.

     *

     * @return    the {@code WindowListener} instance that could be set

     *            on a {@code Window}. After that

     *            the {@code Window} is disposed when "window closed"

     *            event is sent to the {@code Window}

     */

    public static WindowListener getClosingWindowAdapter() {

        return new WindowAdapter () {

            public void windowClosing(WindowEvent e) {

                e.getWindow().dispose();

            }

        };

    }

    /*

     * The values directly map to the ones of

     * sun.awt.X11.XWM & sun.awt.motif.MToolkit classes.

     */

    public final static int

        UNDETERMINED_WM = 1,

        NO_WM = 2,

        OTHER_WM = 3,

        OPENLOOK_WM = 4,

        MOTIF_WM = 5,

        CDE_WM = 6,

        ENLIGHTEN_WM = 7,

        KDE2_WM = 8,

        SAWFISH_WM = 9,

        ICE_WM = 10,

        METACITY_WM = 11,

        COMPIZ_WM = 12,

        LG3D_WM = 13,

        CWM_WM = 14,

        MUTTER_WM = 15;

    /*

     * Returns -1 in case of not X Window or any problems.

     */

    public static int getWMID() {

        Class clazz = null;

        try {

            if ("sun.awt.X11.XToolkit".equals(Toolkit.getDefaultToolkit().getClass().getName())) {

                clazz = Class.forName("sun.awt.X11.XWM");

            } else if ("sun.awt.motif.MToolkit".equals(Toolkit.getDefaultToolkit().getClass().getName())) {

                clazz = Class.forName("sun.awt.motif.MToolkit");

            }

        } catch (ClassNotFoundException cnfe) {

            cnfe.printStackTrace();

        }

        if (clazz == null) {

            return -1;

        }

        try {

            final Class _clazz = clazz;

            Method m_getWMID = (Method)AccessController.doPrivileged(new PrivilegedAction() {

                    public Object run() {

                        try {

                            Method method = _clazz.getDeclaredMethod("getWMID", new Class[] {});

                            if (method != null) {

                                method.setAccessible(true);

                            }

                            return method;

                        } catch (NoSuchMethodException e) {

                            assert false;

                        } catch (SecurityException e) {

                            assert false;

                        }

                        return null;

                    }

                });

            return ((Integer)m_getWMID.invoke(null, new Object[] {})).intValue();

        } catch (IllegalAccessException iae) {

            iae.printStackTrace();

        } catch (InvocationTargetException ite) {

            ite.printStackTrace();

        }

        return -1;

    }

    //Cleans all the references

    public static void cleanUp() {

        apListener = null;

        fgListener = null;

        wgfListener = null;

    }

    ////////////////////////////

    // Some stuff to test focus.

    ////////////////////////////

    private static WindowGainedFocusListener wgfListener = new WindowGainedFocusListener();

    private static FocusGainedListener fgListener = new FocusGainedListener();

    private static ActionPerformedListener apListener = new ActionPerformedListener();

    private abstract static class EventListener {

        AtomicBoolean notifier = new AtomicBoolean(false);

        Component comp;

        boolean printEvent;

        public void listen(Component comp, boolean printEvent) {

            this.comp = comp;

            this.printEvent = printEvent;

            notifier.set(false);

            setListener(comp);

        }

        public AtomicBoolean getNotifier() {

            return notifier;

        }

        abstract void setListener(Component comp);