src/game/java/com/mojang/blaze3d/platform/MacosUtil.java

package com.mojang.blaze3d.platform;

import ca.weblite.objc.Client;
import ca.weblite.objc.NSObject;
import com.sun.jna.Pointer;
import java.io.IOException;
import java.io.InputStream;
import java.util.Base64;
import java.util.Locale;
import java.util.Optional;
import net.minecraft.server.packs.resources.IoSupplier;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import org.lwjgl.glfw.GLFWNativeCocoa;

@OnlyIn(Dist.CLIENT)
public class MacosUtil {
    public static final boolean IS_MACOS = System.getProperty("os.name").toLowerCase(Locale.ROOT).contains("mac");
    private static final int NS_RESIZABLE_WINDOW_MASK = 8;
    private static final int NS_FULL_SCREEN_WINDOW_MASK = 16384;

    public static void exitNativeFullscreen(long p_182518_) {
        getNsWindow(p_182518_).filter(MacosUtil::isInNativeFullscreen).ifPresent(MacosUtil::toggleNativeFullscreen);
    }

    public static void clearResizableBit(long p_312472_) {
        getNsWindow(p_312472_).ifPresent(p_312903_ -> {
            long i = getStyleMask(p_312903_);
            p_312903_.send("setStyleMask:", new Object[]{i & -9L});
        });
    }

    private static Optional<NSObject> getNsWindow(long p_182522_) {
        long i = GLFWNativeCocoa.glfwGetCocoaWindow(p_182522_);
        return i != 0L ? Optional.of(new NSObject(new Pointer(i))) : Optional.empty();
    }

    private static boolean isInNativeFullscreen(NSObject p_311944_) {
        return (getStyleMask(p_311944_) & 16384L) != 0L;
    }

    private static long getStyleMask(NSObject p_309879_) {
        return (Long)p_309879_.sendRaw("styleMask", new Object[0]);
    }

    private static void toggleNativeFullscreen(NSObject p_182524_) {
        p_182524_.send("toggleFullScreen:", new Object[]{Pointer.NULL});
    }

    public static void loadIcon(IoSupplier<InputStream> p_250929_) throws IOException {
        try (InputStream inputstream = p_250929_.get()) {
            String s = Base64.getEncoder().encodeToString(inputstream.readAllBytes());
            Client client = Client.getInstance();
            Object object = client.sendProxy("NSData", "alloc").send("initWithBase64Encoding:", s);
            Object object1 = client.sendProxy("NSImage", "alloc").send("initWithData:", object);
            client.sendProxy("NSApplication", "sharedApplication").send("setApplicationIconImage:", object1);
        }
    }
}