pollymc/libraries/launcher/org/polymc/impl/OneSixLauncher.java

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// SPDX-License-Identifier: GPL-3.0-only
/*
* PolyMC - Minecraft Launcher
* Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program 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.
*
* Linking this library statically or dynamically with other modules is
* making a combined work based on this library. Thus, the terms and
* conditions of the GNU General Public License cover the whole
* combination.
*
* As a special exception, the copyright holders of this library give
* you permission to link this library with independent modules to
* produce an executable, regardless of the license terms of these
* independent modules, and to copy and distribute the resulting
* executable under terms of your choice, provided that you also meet,
* for each linked independent module, the terms and conditions of the
* license of that module. An independent module is a module which is
* not derived from or based on this library. If you modify this
* library, you may extend this exception to your version of the
* library, but you are not obliged to do so. If you do not wish to do
* so, delete this exception statement from your version.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 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.
*/
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package org.polymc.impl;
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import org.polymc.Launcher;
import org.polymc.applet.LegacyFrame;
import org.polymc.utils.Parameters;
import org.polymc.utils.Utils;
import java.applet.Applet;
import java.io.File;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Paths;
import java.util.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
public final class OneSixLauncher implements Launcher {
private static final int DEFAULT_WINDOW_WIDTH = 854;
private static final int DEFAULT_WINDOW_HEIGHT = 480;
private static final Logger LOGGER = Logger.getLogger("OneSixLauncher");
// parameters, separated from ParamBucket
private final List<String> classPath;
private final List<String> mcParams;
private final List<String> traits;
private final String appletClass;
private final String mainClass;
private final String userName, sessionId;
private final String windowTitle;
// secondary parameters
private final int winSizeW;
private final int winSizeH;
private final boolean maximize;
private final String cwd;
private final String serverAddress;
private final String serverPort;
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public OneSixLauncher(Parameters params) {
classPath = params.allSafe("classPath", Collections.<String>emptyList());
mcParams = params.allSafe("param", Collections.<String>emptyList());
mainClass = params.firstSafe("mainClass", "net.minecraft.client.Minecraft");
appletClass = params.firstSafe("appletClass", "net.minecraft.client.MinecraftApplet");
traits = params.allSafe("traits", Collections.<String>emptyList());
userName = params.first("userName");
sessionId = params.first("sessionId");
windowTitle = params.firstSafe("windowTitle", "Minecraft");
serverAddress = params.firstSafe("serverAddress", null);
serverPort = params.firstSafe("serverPort", null);
cwd = System.getProperty("user.dir");
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String windowParams = params.firstSafe("windowParams", null);
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if (windowParams != null) {
String[] dimStrings = windowParams.split("x");
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if (windowParams.equalsIgnoreCase("max")) {
maximize = true;
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winSizeW = DEFAULT_WINDOW_WIDTH;
winSizeH = DEFAULT_WINDOW_HEIGHT;
} else if (dimStrings.length == 2) {
maximize = false;
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winSizeW = Integer.parseInt(dimStrings[0]);
winSizeH = Integer.parseInt(dimStrings[1]);
} else {
throw new IllegalArgumentException("Unexpected window size parameter value: " + windowParams);
}
} else {
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maximize = false;
winSizeW = DEFAULT_WINDOW_WIDTH;
winSizeH = DEFAULT_WINDOW_HEIGHT;
}
}
private void invokeMain(Class<?> mainClass) throws Exception {
Method method = mainClass.getMethod("main", String[].class);
method.invoke(null, (Object) mcParams.toArray(new String[0]));
}
private void legacyLaunch(ClassLoader classLoader) throws Exception {
// Get the Minecraft Class and set the base folder
Class<?> minecraftClass = classLoader.loadClass(mainClass);
Field baseDirField = Utils.getMinecraftBaseDirField(minecraftClass);
if (baseDirField == null) {
LOGGER.warning("Could not find Minecraft path field.");
} else {
baseDirField.setAccessible(true);
baseDirField.set(null, new File(cwd));
}
System.setProperty("minecraft.applet.TargetDirectory", cwd);
if (!traits.contains("noapplet")) {
LOGGER.info("Launching with applet wrapper...");
try {
Class<?> mcAppletClass = classLoader.loadClass(appletClass);
Applet mcApplet = (Applet) mcAppletClass.getConstructor().newInstance();
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LegacyFrame mcWindow = new LegacyFrame(windowTitle, mcApplet);
mcWindow.start(
userName,
sessionId,
winSizeW,
winSizeH,
maximize,
serverAddress,
serverPort
);
return;
} catch (Exception e) {
LOGGER.log(Level.SEVERE, "Applet wrapper failed: ", e);
LOGGER.warning("Falling back to using main class.");
}
}
invokeMain(minecraftClass);
}
private void launchWithMainClass(ClassLoader classLoader) throws Exception {
// window size, title and state, onesix
// FIXME: there is no good way to maximize the minecraft window in onesix.
// the following often breaks linux screen setups
// mcparams.add("--fullscreen");
if (!maximize) {
mcParams.add("--width");
mcParams.add(Integer.toString(winSizeW));
mcParams.add("--height");
mcParams.add(Integer.toString(winSizeH));
}
if (serverAddress != null) {
mcParams.add("--server");
mcParams.add(serverAddress);
mcParams.add("--port");
mcParams.add(serverPort);
}
invokeMain(classLoader.loadClass(mainClass));
}
@Override
public void launch() throws Exception {
URL[] classPathURLs = new URL[classPath.size()];
for (int i = 0; i < classPath.size(); i++) {
File f = new File(classPath.get(i));
classPathURLs[i] = f.toURI().toURL();
}
// Some mod loaders (Fabric) read this property to determine the classpath.
String systemClassPath = System.getProperty("java.class.path");
systemClassPath += File.pathSeparator + String.join(File.pathSeparator, classPath);
System.setProperty("java.class.path", systemClassPath);
ClassLoader classLoader = new URLClassLoader(classPathURLs, getClass().getClassLoader());
if (traits.contains("legacyLaunch") || traits.contains("alphaLaunch")) {
// legacy launch uses the applet wrapper
legacyLaunch(classLoader);
} else {
// normal launch just calls main()
launchWithMainClass(classLoader);
}
}
}