src/game/java/net/minecraft/world/item/CompassItem.java

package net.minecraft.world.item;

import java.util.Optional;
import net.minecraft.core.BlockPos;
import net.minecraft.core.GlobalPos;
import net.minecraft.core.component.DataComponents;
import net.minecraft.network.chat.Component;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.component.LodestoneTracker;
import net.minecraft.world.item.context.UseOnContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.Blocks;

public class CompassItem extends Item {
    private static final Component LODESTONE_COMPASS_NAME = Component.translatable("item.minecraft.lodestone_compass");

    public CompassItem(Item.Properties p_40718_) {
        super(p_40718_);
    }

    @Override
    public boolean isFoil(ItemStack p_40739_) {
        return p_40739_.has(DataComponents.LODESTONE_TRACKER) || super.isFoil(p_40739_);
    }

    @Override
    public void inventoryTick(ItemStack p_40720_, Level p_40721_, Entity p_40722_, int p_40723_, boolean p_40724_) {
        if (p_40721_ instanceof ServerLevel serverlevel) {
            LodestoneTracker lodestonetracker = p_40720_.get(DataComponents.LODESTONE_TRACKER);
            if (lodestonetracker != null) {
                LodestoneTracker lodestonetracker1 = lodestonetracker.tick(serverlevel);
                if (lodestonetracker1 != lodestonetracker) {
                    p_40720_.set(DataComponents.LODESTONE_TRACKER, lodestonetracker1);
                }
            }
        }
    }

    @Override
    public InteractionResult useOn(UseOnContext p_40726_) {
        BlockPos blockpos = p_40726_.getClickedPos();
        Level level = p_40726_.getLevel();
        if (!level.getBlockState(blockpos).is(Blocks.LODESTONE)) {
            return super.useOn(p_40726_);
        } else {
            level.playSound(null, blockpos, SoundEvents.LODESTONE_COMPASS_LOCK, SoundSource.PLAYERS, 1.0F, 1.0F);
            Player player = p_40726_.getPlayer();
            ItemStack itemstack = p_40726_.getItemInHand();
            boolean flag = !player.hasInfiniteMaterials() && itemstack.getCount() == 1;
            LodestoneTracker lodestonetracker = new LodestoneTracker(Optional.of(GlobalPos.of(level.dimension(), blockpos)), true);
            if (flag) {
                itemstack.set(DataComponents.LODESTONE_TRACKER, lodestonetracker);
            } else {
                ItemStack itemstack1 = itemstack.transmuteCopy(Items.COMPASS, 1);
                itemstack.consume(1, player);
                itemstack1.set(DataComponents.LODESTONE_TRACKER, lodestonetracker);
                if (!player.getInventory().add(itemstack1)) {
                    player.drop(itemstack1, false);
                }
            }

            return InteractionResult.SUCCESS;
        }
    }

    @Override
    public Component getName(ItemStack p_368976_) {
        return p_368976_.has(DataComponents.LODESTONE_TRACKER) ? LODESTONE_COMPASS_NAME : super.getName(p_368976_);
    }
}