/*
* Open Source Physics software is free software as described near the bottom of this code file.
*
* For additional information and documentation on Open Source Physics please see:
* <https://www.compadre.org/osp/>
*/
package org.opensourcephysics.davidson.applets;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Iterator;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.WindowConstants;
import org.opensourcephysics.controls.MainFrame;
import org.opensourcephysics.controls.MessageFrame;
import org.opensourcephysics.controls.OSPLog;
import org.opensourcephysics.display.OSPRuntime;
import org.opensourcephysics.display.TextFrame;
import org.opensourcephysics.tools.Resource;
import org.opensourcephysics.tools.ResourceLoader;
import org.opensourcephysics.tools.Translator;
/**
* ApplicationApplet displays a button that invokes a static main method in a target class.
* This Applet can be used to run an application's main method as an Applet. Security restrictions may cause some
* programs to malfunction if the jar file is not signed.
*
* @version 1.0
* @author Wolfgang Christian
* @created October 06, 2005
*/
public class ApplicationApplet extends JApplet {
JFrame mainFrame = null;
JButton showFramesButton = new JButton("Show"); //$NON-NLS-1$
String targetClassName;
ArrayList<Frame> newFrames = new ArrayList<Frame>();
ArrayList<Frame> existingFrames = new ArrayList<Frame>();
Class<?> target;
String[] args = null;
boolean singleApp = false;
String targetError = null;
/**
* Gets the parameter attribute of the ApplicationApplet object
*
* @param key Description of Parameter
* @param def Description of Parameter
* @return The parameter value
*/
public String getParameter(String key, String def) {
return((getParameter(key)!=null) ? getParameter(key) : def);
}
/**
* Initializes the applet
*/
public void init() {
super.init();
OSPRuntime.applet = this;
OSPRuntime.appletMode = false; // This insures that ALL frames are made visible when the applet is launched.
if(getParameter("showLog", "false").toLowerCase().trim().equals("true")) { //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
OSPLog.showLog();
}
String arg0 = getParameter("xmldata", null); //$NON-NLS-1$
arg0 = getParameter("args[0]", arg0); //$NON-NLS-1$
if(arg0!=null) {
args = new String[1];
}
String arg1 = getParameter("args[1]", null); //$NON-NLS-1$
String arg2 = getParameter("args[2]", null); //$NON-NLS-1$
if(arg2!=null) {
args = new String[3];
args[0] = arg0;
args[1] = arg1;
args[2] = arg2;
} else if(arg1!=null) {
args = new String[2];
args[0] = arg0;
args[1] = arg1;
} else if(arg0!=null) {
args = new String[1];
args[0] = arg0;
}
targetClassName = getParameter("target", null); //$NON-NLS-1$
if(targetClassName==null) {
targetClassName = getParameter("app", null); //$NON-NLS-1$
}
if(targetClassName==null) {
readManifest();
}
String title = getParameter("title", null); //$NON-NLS-1$
singleApp = getParameter("singleapp", "false").trim().equalsIgnoreCase("true"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
if(title==null) {
String[] s = targetClassName.split("[\056]"); // period character //$NON-NLS-1$
showFramesButton.setText(s[s.length-1]);
} else {
showFramesButton.setText(title);
}
getRootPane().getContentPane().add(showFramesButton, BorderLayout.CENTER);
showFramesButton.addActionListener(new DisplayBtnListener());
}
/**
* Determines whether the specified class is launchable.
*
* @param type the launch class to verify
* @return <code>true</code> if the class is launchable
*/
static boolean isLaunchable(Class<?> type) {
if(type==null) {
return false;
}
try {
// throws exception if method not found; return value not used
type.getMethod("main", new Class[] {String[].class}); //$NON-NLS-1$
return true;
} catch(NoSuchMethodException ex) {
return false;
}
}
/**
* Destroys the applet's resources.
*/
public void destroy() {
disposeOwnedFrames();
target = null;
mainFrame = null;
super.destroy();
}
private void readManifest() {
//String launchJar = ResourceLoader.getLaunchJarPath();
//System.out.println(launchJar);
String archive = getParameter("archive", null); //$NON-NLS-1$
archive = archive.split(";")[0]; //$NON-NLS-1$
OSPLog.finer("archive applet tag="+archive); //$NON-NLS-1$
if(archive==null) {
return;
}
String name = "META-INF/MANIFEST.MF"; //$NON-NLS-1$
Resource res = ResourceLoader.getResource(archive, name);
if(res==null) {
OSPLog.fine("manifest not found in="+archive); //$NON-NLS-1$
return;
}
String manifest = res.getString();
String[] lines = manifest.split("\n"); //$NON-NLS-1$
for(int i = 0, n = Math.min(10, lines.length); i<n; i++) {
int index = lines[i].indexOf("Main-Class:"); //$NON-NLS-1$
if(index>=0) {
targetClassName = lines[i].substring("Main-Class:".length()+index).trim(); //$NON-NLS-1$
OSPLog.fine("target class in manifest="+targetClassName); //$NON-NLS-1$
return;
}
}
}
private Class<?> createTarget() {
Class<?> type = null;
targetError = null;
// create the class loader
// ClassLoader classLoader = URLClassLoader.newInstance(new URL[] {getCodeBase()});
ClassLoader classLoader = getClass().getClassLoader();
try {
type = classLoader.loadClass(targetClassName);
} catch(ClassNotFoundException ex1) {
System.err.println("Class not found: "+targetClassName); //$NON-NLS-1$
targetError = "Class not found: "+targetClassName; //$NON-NLS-1$
return null;
}
if(!isLaunchable(type)) {
System.err.println("Main method not found in "+targetClassName); //$NON-NLS-1$
targetError = "Main method not found in "+targetClassName; //$NON-NLS-1$
return null;
}
// get the existing frames
Frame[] frames = Frame.getFrames();
existingFrames.clear();
for(int i = 0, n = frames.length; i<n; i++) {
existingFrames.add(frames[i]);
}
// load html data file
String htmldata = getParameter("htmldata", null); //$NON-NLS-1$
if(htmldata!=null) {
TextFrame htmlframe = new TextFrame(htmldata, type);
htmlframe.setVisible(true);
}
// launch the app by invoking main method
try {
Method m = type.getMethod("main", new Class[] {String[].class}); //$NON-NLS-1$
m.invoke(type, new Object[] {args});
frames = Frame.getFrames();
for(int i = 0, n = frames.length; i<n; i++) {
if(frames[i] instanceof MainFrame) {
mainFrame = (JFrame) frames[i];
}
if((frames[i] instanceof JFrame)&&((JFrame) frames[i]).getDefaultCloseOperation()==JFrame.EXIT_ON_CLOSE) {
((JFrame) frames[i]).setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);
if(mainFrame==null) {
mainFrame = (JFrame) frames[i]; // assume this is the main application frame
}
}
if(!existingFrames.contains(frames[i])) {
// manage new frames
newFrames.add(frames[i]);
}
}
} catch(NoSuchMethodException ex) {
System.err.println(ex);
targetError = ex.toString();
} catch(InvocationTargetException ex) {
System.err.println(ex);
System.err.println(ex.getStackTrace());
targetError = ex.toString();
} catch(IllegalAccessException ex) {
System.err.println(ex);
targetError = ex.toString();
}
return type;
}
private class DisplayBtnListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if(singleApp&&(OSPRuntime.applet!=ApplicationApplet.this)) {
disposeOwnedFrames();
target = null;
mainFrame = null;
OSPRuntime.applet = ApplicationApplet.this;
}
if(target==null) {
target = createTarget();
if(targetError!=null) {
target = null;
}
return;
}
Frame[] frames = Frame.getFrames();
for(int i = 0, n = frames.length; i<n; i++) {
if(!frames[i].isDisplayable()) {
existingFrames.remove(frames[i]);
newFrames.remove(frames[i]);
} else if(!existingFrames.contains(frames[i])) {
newFrames.add(frames[i]);
}
if((frames[i] instanceof MainFrame)&&frames[i].isDisplayable()) {
mainFrame = (JFrame) frames[i];
}
}
Iterator<Frame> it = newFrames.iterator();
while(it.hasNext()) {
Frame frame = (it.next());
if(frame.isDisplayable()&&!(frame instanceof OSPLog)&&!(frame instanceof MessageFrame)&&!(frame instanceof Translator)) {
frame.setVisible(true);
}
}
if(mainFrame!=null) {
mainFrame.setState(Frame.NORMAL);
mainFrame.setVisible(true);
mainFrame.toFront();
}
}
}
private void disposeOwnedFrames() {
Frame frame[] = Frame.getFrames();
for(int i = 0, n = frame.length; i<n; i++) {
if(frame[i].getClass().getName().startsWith("sun.plugin")) { //$NON-NLS-1$
continue; // don't mess with plugin
}
if((frame[i] instanceof JFrame)&&((JFrame) frame[i]).getDefaultCloseOperation()==JFrame.EXIT_ON_CLOSE) {
((JFrame) frame[i]).setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
}
if(!existingFrames.contains(frame[i])) {
frame[i].setVisible(false);
frame[i].dispose();
}
}
newFrames.clear();
}
}
/*
* Open Source Physics software is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public License (GPL) as
* published by the Free Software Foundation; either version 2 of the License,
* or(at your option) any later version.
*
* Code that uses any portion of the code in the org.opensourcephysics package
* or any subpackage (subdirectory) of this package must must also be be released
* under the GNU GPL license.
*
* This software 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
* or view the license online at http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2019 The Open Source Physics project
* https://www.compadre.org/osp
*/
