1 files changed, 167 insertions, 0 deletions
diff --git a/libraries/launcher/org/multimc/applet/LegacyFrame.java b/libraries/launcher/org/multimc/applet/LegacyFrame.java
new file mode 100644
index 00000000..a5e6c170
--- /dev/null
+++ b/libraries/launcher/org/multimc/applet/LegacyFrame.java
@@ -0,0 +1,167 @@
+package org.multimc.applet;/*
+ * Copyright 2012-2021 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.
+ */
+
+import net.minecraft.Launcher;
+
+import javax.imageio.ImageIO;
+import java.applet.Applet;
+import java.awt.*;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.io.File;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.util.Scanner;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public final class LegacyFrame extends Frame {
+
+    private static final Logger LOGGER = Logger.getLogger("LegacyFrame");
+
+    private Launcher appletWrap;
+
+    public LegacyFrame(String title) {
+        super(title);
+
+        try {
+            setIconImage(ImageIO.read(new File("icon.png")));
+        } catch (IOException e) {
+            LOGGER.log(Level.WARNING, "Unable to read Minecraft icon!", e);
+        }
+
+        this.addWindowListener(new ForceExitHandler());
+    }
+
+    public void start (
+        Applet mcApplet,
+        String user,
+        String session,
+        int winSizeW,
+        int winSizeH,
+        boolean maximize,
+        String serverAddress,
+        String serverPort
+    ) {
+        try {
+            appletWrap = new Launcher(mcApplet, new URL("http://www.minecraft.net/game"));
+        } catch (MalformedURLException ignored) {}
+        
+        // Implements support for launching in to multiplayer on classic servers using a mpticket
+        // file generated by an external program and stored in the instance's root folder.
+        Path mpticketFile = Paths.get(System.getProperty("user.dir") + "/../mpticket");
+        Path mpticketFileCorrupt = Paths.get(System.getProperty("user.dir") + "/../mpticket.corrupt");
+
+        if (Files.exists(mpticketFile)) {
+            try (Scanner fileScanner = new Scanner(
+                    Files.newInputStream(mpticketFile),
+                    StandardCharsets.US_ASCII.name()
+            )) {
+                String[] mpticketParams = new String[3];
+
+                for (int i = 0; i < mpticketParams.length; i++) {
+                    if (fileScanner.hasNextLine()) {
+                        mpticketParams[i] = fileScanner.nextLine();
+                    } else {
+                        Files.move(
+                                mpticketFile,
+                                mpticketFileCorrupt,
+                                StandardCopyOption.REPLACE_EXISTING
+                        );
+
+                        throw new IllegalArgumentException("Mpticket file is corrupted!");
+                    }
+                }
+
+                Files.delete(mpticketFile);
+
+                // Assumes parameters are valid and in the correct order
+                appletWrap.setParameter("server", mpticketParams[0]);
+                appletWrap.setParameter("port", mpticketParams[1]);
+                appletWrap.setParameter("mppass", mpticketParams[2]);
+            } catch (IOException e) {
+                LOGGER.log(Level.WARNING, "Unable to read mpticket file!", e);
+            }
+        }
+
+        if (serverAddress != null) {
+            appletWrap.setParameter("server", serverAddress);
+            appletWrap.setParameter("port", serverPort);
+        }
+
+        appletWrap.setParameter("username", user);
+        appletWrap.setParameter("sessionid", session);
+        appletWrap.setParameter("stand-alone", "true"); // Show the quit button.
+        appletWrap.setParameter("haspaid", "true"); // Some old versions need this for world saves to work.
+        appletWrap.setParameter("demo", "false");
+        appletWrap.setParameter("fullscreen", "false");
+
+        mcApplet.setStub(appletWrap);
+
+        add(appletWrap);
+
+        appletWrap.setPreferredSize(new Dimension(winSizeW, winSizeH));
+
+        pack();
+
+        setLocationRelativeTo(null);
+        setResizable(true);
+
+        if (maximize)
+            this.setExtendedState(MAXIMIZED_BOTH);
+
+        validate();
+
+        appletWrap.init();
+        appletWrap.start();
+
+        setVisible(true);
+    }
+
+    private final class ForceExitHandler extends WindowAdapter {
+
+        @Override
+        public void windowClosing(WindowEvent e) {
+            new Thread(() -> {
+                try {
+                    Thread.sleep(30000L);
+                } catch (InterruptedException localInterruptedException) {
+                    localInterruptedException.printStackTrace();
+                }
+
+                LOGGER.info("Forcing exit!");
+
+                System.exit(0);
+            }).start();
+
+            if (appletWrap != null) {
+                appletWrap.stop();
+                appletWrap.destroy();
+            }
+
+            // old minecraft versions can hang without this >_<
+            System.exit(0);
+        }
+
+    }
+
+}