Fix lwjgl3ify 3.0 compatibility in the exit confirmation code

build.gradle.kts

@@ -0,0 +1,23 @@
+plugins {
+    id("com.gtnewhorizons.gtnhconvention")
+}
+
+tasks.test.configure {
+    useJUnitPlatform()
+    testLogging {
+        events ("passed", "skipped", "failed")
+    }
+}
+
+configurations {
+    testImplementation.get().extendsFrom(compileOnly.get())
+}
+
+// Allow optional lwjgl3 usage, make sure to hide it behind the appropriate conditionals
+// This can't be in dependencies.gradle due to need to freeze the lwjgl3 version property
+val lwjgl3Version = project.minecraft.lwjgl3Version.get()!!
+dependencies {
+    compileOnly("org.lwjgl:lwjgl-sdl:${lwjgl3Version}") { isTransitive = false }
+    compileOnly("org.lwjgl:lwjgl:${lwjgl3Version}") { isTransitive = false }
+    compileOnly("com.github.GTNewHorizons:lwjgl3ify:3.0.3:dev") { isTransitive = false }
+}

src/main/java/com/dreammaster/lwjgl3ify/ConfirmExitSdl.java

@@ -0,0 +1,68 @@
+package com.dreammaster.lwjgl3ify;
+
+import static org.lwjgl.sdl.SDLMessageBox.*;
+
+import java.nio.IntBuffer;
+
+import net.minecraft.util.StatCollector;
+
+import org.lwjgl.sdl.SDLError;
+import org.lwjgl.sdl.SDL_MessageBoxButtonData;
+import org.lwjgl.sdl.SDL_MessageBoxData;
+import org.lwjgl.system.MemoryStack;
+import org.lwjglx.opengl.Display;
+
+import com.dreammaster.coremod.DreamCoreMod;
+import com.dreammaster.lib.Refstrings;
+
+import me.eigenraven.lwjgl3ify.api.Lwjgl3Aware;
+
+@Lwjgl3Aware
+public class ConfirmExitSdl {
+
+    // Keep as static final ints to avoid adding a classloading dependency when used
+    public static final int BUTTON_YES = 0;
+    public static final int BUTTON_NO = 1;
+    public static final int BUTTON_NEVER = 2;
+
+    private static String translateOrDefault(String key, String defaultValue) {
+        return StatCollector.canTranslate(key) ? StatCollector.translateToLocal(key) : defaultValue;
+    }
+
+    /**
+     * @return 0 for Yes, 1 for No,
+     */
+    @SuppressWarnings("resource")
+    public static int showExitDialog() {
+        try (MemoryStack stack = MemoryStack.stackPush()) {
+            final IntBuffer selectedOption = stack.ints(1);
+            final SDL_MessageBoxData box = SDL_MessageBoxData.calloc(stack);
+
+            final String yesText = translateOrDefault("dreamcraft.gui.quitmessage.yes", "Yes");
+            final String noText = translateOrDefault("dreamcraft.gui.quitmessage.no", "No");
+            final String neverText = translateOrDefault("dreamcraft.gui.quitmessage.never", "Don't Show Again!");
+            final String messageText = translateOrDefault(
+                    "dreamcraft.gui.quitmessage",
+                    "Are you sure you want to exit the game?");
+
+            box.flags(SDL_MESSAGEBOX_WARNING);
+            box.window(Display.getWindow());
+            box.title(stack.UTF8(Refstrings.NAME));
+            box.message(stack.UTF8(messageText));
+
+            final SDL_MessageBoxButtonData.Buffer buttons = SDL_MessageBoxButtonData.calloc(3, stack);
+            buttons.get(BUTTON_YES).set(SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, BUTTON_YES, stack.UTF8(yesText));
+            buttons.get(BUTTON_NO).set(SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT, BUTTON_NO, stack.UTF8(noText));
+            buttons.get(BUTTON_NEVER).set(0, BUTTON_NEVER, stack.UTF8(neverText));
+            box.buttons(buttons);
+
+            if (!SDL_ShowMessageBox(box, selectedOption)) {
+                DreamCoreMod.logger
+                        .error("Could not create exit confirmation message box: {}", SDLError.SDL_GetError());
+                // Assume it's ok to quit in case the message box cannot be spawned
+                return BUTTON_YES;
+            }
+            return selectedOption.get(0);
+        }
+    }
+}

src/main/java/com/dreammaster/mixin/mixins/early/MixinMinecraft_ConfirmExit.java

@@ -7,6 +7,7 @@
 import javax.swing.JOptionPane;
 
 import net.minecraft.client.Minecraft;
+import net.minecraft.launchwrapper.Launch;
 import net.minecraft.util.StatCollector;
 
 import org.spongepowered.asm.mixin.Mixin;
@@ -19,6 +20,7 @@
 import com.dreammaster.client.util.IconLoader;
 import com.dreammaster.coremod.DreamCoreMod;
 import com.dreammaster.lib.Refstrings;
+import com.dreammaster.lwjgl3ify.ConfirmExitSdl;
 
 @Mixin(Minecraft.class)
 public abstract class MixinMinecraft_ConfirmExit {
@@ -40,6 +42,22 @@ public abstract class MixinMinecraft_ConfirmExit {
         if (!this.dreamcraft$waitingDialogQuit) {
             this.dreamcraft$waitingDialogQuit = true;
             new Thread(() -> {
+                // Do not use Swing when lwjgl3ify 3.x is active
+                if ((Integer) Launch.blackboard.getOrDefault("lwjgl3ify:major-version", Integer.MIN_VALUE) >= 3) {
+                    final int choice = ConfirmExitSdl.showExitDialog();
+                    if (choice == ConfirmExitSdl.BUTTON_YES) {
+                        this.dreamcraft$isCloseRequested = true;
+                        this.shutdown();
+                    } else if (choice == ConfirmExitSdl.BUTTON_NEVER) {
+                        this.dreamcraft$isCloseRequested = true;
+                        DreamCoreMod.disableShowConfirmExitWindow();
+                        this.shutdown();
+                    }
+                    this.dreamcraft$waitingDialogQuit = false;
+
+                    return;
+                }
+
                 final JFrame frame = new JFrame();
                 frame.setAlwaysOnTop(true);
                 final URL resource = IconLoader.class.getClassLoader()