//
// Copyright 2012 MultiMC Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import java.applet.Applet;
import java.awt.Dimension;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Modifier;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import org.simplericity.macify.eawt.Application;
import org.simplericity.macify.eawt.DefaultApplication;
public class MultiMCLauncher
{
/**
* @param args
* The arguments you want to launch Minecraft with. New path,
* Username, Session ID.
*/
public static void main(String[] args)
{
if (args.length < 3)
{
System.out.println("Not enough arguments.");
System.exit(-1);
}
// Set the OSX application icon first, if we are on OSX.
Application application = new DefaultApplication();
if(application.isMac())
{
try
{
BufferedImage image = ImageIO.read(new File("icon.png"));
application.setApplicationIconImage(image);
}
catch (IOException e)
{
e.printStackTrace();
}
}
String userName = args[0];
String sessionId = args[1];
String windowtitle = args[2];
String windowParams = args[3];
String lwjgl = args[4];
String cwd = System.getProperty("user.dir");
Dimension winSize = new Dimension(854, 480);
boolean maximize = false;
boolean compatMode = false;
String[] dimStrings = windowParams.split("x");
if (windowParams.equalsIgnoreCase("compatmode"))
{
compatMode = true;
}
else if (windowParams.equalsIgnoreCase("max"))
{
maximize = true;
}
else if (dimStrings.length == 2)
{
try
{
winSize = new Dimension(Integer.parseInt(dimStrings[0]),
Integer.parseInt(dimStrings[1]));
}
catch (NumberFormatException e)
{
System.out.println("Invalid Window size argument, " +
"using default.");
}
}
else
{
System.out.println("Invalid Window size argument, " +
"using default.");
}
try
{
File binDir = new File(cwd, "bin");
File lwjglDir;
if(lwjgl.equalsIgnoreCase("Mojang"))
lwjglDir = binDir;
else
lwjglDir = new File(lwjgl);
System.out.println("Loading jars...");
String[] lwjglJars = new String[] {
"lwjgl.jar", "lwjgl_util.jar", "jinput.jar"
};
URL[] urls = new URL[4];
try
{
File f = new File(binDir, "minecraft.jar");
urls[0] = f.toURI().toURL();
System.out.println("Loading URL: " + urls[0].toString());
for (int i = 1; i < urls.length; i++)
{
File jar = new File(lwjglDir, lwjglJars[i-1]);
urls[i] = jar.toURI().toURL();
System.out.println("Loading URL: " + urls[i].toString());
}
}
catch (MalformedURLException e)
{
System.err.println("MalformedURLException, " + e.toString());
System.exit(5);
}
System.out.println("Loading natives...");
String nativesDir = new File(lwjglDir, "natives").toString();
System.setProperty("org.lwjgl.librarypath", nativesDir);
System.setProperty("net.java.games.input.librarypath", nativesDir);
URLClassLoader cl =
new URLClassLoader(urls, MultiMCLauncher.class.getClassLoader());
// Get the Minecraft Class.
Class<?> mc = null;
try
{
mc = cl.loadClass("net.minecraft.client.Minecraft");
Field f = getMCPathField(mc);
if (f == null)
{
System.err.println("Could not find Minecraft path field. Launch failed.");
System.exit(-1);
}
f.setAccessible(true);
f.set(null, new File(cwd));
// And set it.
System.out.println("Fixed Minecraft Path: Field was " + f.toString());
}
catch (ClassNotFoundException e)
{
System.err.println("Can't find main class. Searching...");
// Look for any class that looks like the main class.
File mcJar = new File(new File(cwd, "bin"), "minecraft.jar");
ZipFile zip = null;
try
{
zip = new ZipFile(mcJar);
} catch (ZipException e1)
{
e1.printStackTrace();
System.err.println("Search failed.");
System.exit(-1);
} catch (IOException e1)
{
e1.printStackTrace();
System.err.println("Search failed.");
System.exit(-1);
}
Enumeration<? extends ZipEntry> entries = zip.entries();
ArrayList<String> classes = new ArrayList<String>();
while (entries.hasMoreElements())
{
ZipEntry entry = entries.nextElement();
if (entry.getName().endsWith(".class"))
{
String entryName = entry.getName().substring(0, entry.getName().lastIndexOf('.'));
entryName = entryName.replace('/', '.');
System.out.println("Found class: " + entryName);
classes.add(entryName);
}
}
for (String clsName : classes)
{
try
{
Class<?> cls = cl.loadClass(clsName);
if (!Runnable.class.isAssignableFrom(cls))
{
continue;
}
else
{
System.out.println("Found class implementing runnable: " +
cls.getName());
}
if (getMCPathField(cls) == null)
{
continue;
}
else
{
System.out.println("Found class implementing runnable " +
"with mcpath field: " + cls.getName());
}
mc = cls;
break;
}
catch (ClassNotFoundException e1)
{
// Ignore
continue;
}
}
if (mc == null)
{
System.err.println("Failed to find Minecraft main class.");
System.exit(-1);
}
else
{
System.out.println("Found main class: " + mc.getName());
}
}
System.setProperty("minecraft.applet.TargetDirectory", cwd);
String[] mcArgs = new String[2];
mcArgs[0] = userName;
mcArgs[1] = sessionId;
if (compatMode)
{
System.out.println("Launching in compatibility mode...");
mc.getMethod("main", String[].class).invoke(null, (Object) mcArgs);
}
else
{
System.out.println("Launching with applet wrapper...");
try
{
Class<?> MCAppletClass = cl.loadClass(
"net.minecraft.client.MinecraftApplet");
Applet mcappl = (Applet) MCAppletClass.newInstance();
MCFrame mcWindow = new MCFrame(windowtitle);
mcWindow.start(mcappl, userName, sessionId, winSize, maximize);
} catch (InstantiationException e)
{
System.out.println("Applet wrapper failed! Falling back " +
"to compatibility mode.");
mc.getMethod("main", String[].class).invoke(null, (Object) mcArgs);
}
}
} catch (ClassNotFoundException e)
{
e.printStackTrace();
System.exit(1);
} catch (IllegalArgumentException e)
{
e.printStackTrace();
System.exit(2);
} catch (IllegalAccessException e)
{
e.printStackTrace();
System.exit(2);
} catch (InvocationTargetException e)
{
e.printStackTrace();
System.exit(3);
} catch (NoSuchMethodException e)
{
e.printStackTrace();
System.exit(3);
} catch (SecurityException e)
{
e.printStackTrace();
System.exit(4);
}
}
public static Field getMCPathField(Class<?> mc)
{
Field[] fields = mc.getDeclaredFields();
for (int i = 0; i < fields.length; i++)
{
Field f = fields[i];
if (f.getType() != File.class)
{
// Has to be File
continue;
}
if (f.getModifiers() != (Modifier.PRIVATE + Modifier.STATIC))
{
// And Private Static.
continue;
}
return f;
}
return null;
}
}