undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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test/jdk/java/awt/event/MouseEvent/AWTPanelSmoothWheel.java
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test/jdk/java/awt/event/MouseEvent/AWTPanelSmoothWheel.java
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/*
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* Copyright (c) 2009, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.awt.BorderLayout;
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import java.awt.Color;
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import java.awt.Frame;
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import java.awt.Panel;
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import java.awt.event.MouseWheelEvent;
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import javax.swing.JOptionPane;
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/*
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* @test
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* @bug 6730447
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* @summary To verify the support for high resolution mouse wheel.
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* AWT panel needs to support high-res mouse wheel rotation.
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* @library /java/awt/regtesthelpers
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* @build PassFailJFrame
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* @run main/manual AWTPanelSmoothWheel
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*/
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public class AWTPanelSmoothWheel {
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private static int wheelEventCount = 0;
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private static int hiResWheelCount = 0;
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private static final String WARNING_MSG = "WARNING !!!"
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+ " You might NOT be using a hi-res mouse.";
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private static final String INSTRUCTIONS = """
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<html>
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<body>
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This test is relevant on platforms with high-resolution mouse wheel
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or a trackpad can be used too.
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Please press PASS if this is not the case.<br> <br>
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Place the mouse cursor above the green panel and rotate the mouse wheel,
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the test will print mouse wheel event messages in the format
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<b> [Event#, WheelRotation, PreciseWheelRotation]</b> into the logging
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panel below the instruction window.<br> <br>
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A hi-res mouse/trackpad is one which produces MouseWheelEvents having:
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<pre><b> Math.abs(preciseWheelRotation) < 1. </b></pre><br>
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Check if the test works OK when the mouse-wheel/trackpad is scrolled
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very slowly.<br> <br>
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This is a semi-automated test, if you are using a hi-res mouse/trackpad
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and it satisfies the hi-res MouseWheelEvents as described below,
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the test should automatically pass.<br> <br>
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When preciseWheelRotation adds up, wheelRotation becomes non-zero
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(can be negative when mouse wheel is scrolled down). <br>
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You should see many events where the absolute value of
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preciseWheelRotation < 1 & wheelRotation = 0 followed by
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an event where wheelRotation != 0 in the logs.<br> <br>
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<hr>
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<b> NOTE: </b>
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<ul>
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<li> If you don't see events with preciseWheelRotation < 1,
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then the mouse doesn't support high-resolution scrolling. </li>
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<li> A warning is shown if you are not using a hi-res mouse. </li>
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<li> MouseWheelEvent logs are displayed in the log area
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for user reference. </li>
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<li> When mouse is scrolled up, preciseWheelRotation & wheelRotation
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are positive and they are negative when scrolled down. </li>
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</ul>
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</body>
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</html>
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""";
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public static void main(String[] args) throws Exception {
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PassFailJFrame.builder()
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.title("Test Instructions")
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.instructions(INSTRUCTIONS)
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.rows(30)
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.columns(54)
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.testTimeOut(10)
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.logArea(10)
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.testUI(AWTPanelSmoothWheel::createUI)
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.build()
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.awaitAndCheck();
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}
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private static Frame createUI() {
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Frame frame = new Frame("Test Wheel Rotation");
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Panel panel = new Panel();
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panel.setBackground(Color.GREEN);
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panel.addMouseWheelListener(e -> {
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if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
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PassFailJFrame.log("WheelEvent#" + (++wheelEventCount)
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+ " --- Wheel Rotation: " + e.getWheelRotation()
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+ " --- Precise Wheel Rotation: "
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+ String.format("%.2f", e.getPreciseWheelRotation()));
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if (Math.abs(e.getPreciseWheelRotation()) < 1) {
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hiResWheelCount++;
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}
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if (wheelEventCount >= 5 && hiResWheelCount == 0) {
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PassFailJFrame.log(WARNING_MSG);
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JOptionPane.showMessageDialog(frame, WARNING_MSG,
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"Warning", JOptionPane.WARNING_MESSAGE);
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}
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if (e.getWheelRotation() != 0 && hiResWheelCount > 0) {
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PassFailJFrame.log("The test passes: hiResWheelCount = "
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+ hiResWheelCount);
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PassFailJFrame.forcePass();
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}
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}
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});
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frame.setSize(400, 200);
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frame.setLayout(new BorderLayout());
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frame.add(panel, BorderLayout.CENTER);
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return frame;
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}
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}
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