From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Sun, 21 Jun 2015 15:07:20 -0400
Subject: [PATCH] Custom replacement for eaten items


diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index c177e3ba30b8807eb41ad7741706d9a017ab9717..21a356b3c7d3dec73e5c8feaa4afda479a7ec1a2 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3983,10 +3983,11 @@ public abstract class LivingEntity extends Entity implements Attackable {
                 if (!this.useItem.isEmpty() && this.isUsingItem()) {
                     // CraftBukkit start - fire PlayerItemConsumeEvent
                     ItemStack itemstack;
+                    PlayerItemConsumeEvent event = null; // Paper
                     if (this instanceof ServerPlayer entityPlayer) {
                         org.bukkit.inventory.ItemStack craftItem = CraftItemStack.asBukkitCopy(this.useItem);
                         org.bukkit.inventory.EquipmentSlot hand = org.bukkit.craftbukkit.CraftEquipmentSlot.getHand(enumhand);
-                        PlayerItemConsumeEvent event = new PlayerItemConsumeEvent((Player) this.getBukkitEntity(), craftItem, hand);
+                        event = new PlayerItemConsumeEvent((Player) this.getBukkitEntity(), craftItem, hand); // Paper
                         this.level().getCraftServer().getPluginManager().callEvent(event);
 
                         if (event.isCancelled()) {
@@ -4004,6 +4005,12 @@ public abstract class LivingEntity extends Entity implements Attackable {
                     } else {
                         itemstack = this.useItem.finishUsingItem(this.level(), this);
                     }
+                    // Paper start - save the default replacement item and change it if necessary
+                    final ItemStack defaultReplacement = itemstack;
+                    if (event != null && event.getReplacement() != null) {
+                        itemstack = CraftItemStack.asNMSCopy(event.getReplacement());
+                    }
+                    // Paper end
                     // CraftBukkit end
 
                     if (itemstack != this.useItem) {
@@ -4011,6 +4018,11 @@ public abstract class LivingEntity extends Entity implements Attackable {
                     }
 
                     this.stopUsingItem();
+                    // Paper start - if the replacement is anything but the default, update the client inventory
+                    if (this instanceof ServerPlayer && !com.google.common.base.Objects.equal(defaultReplacement, itemstack)) {
+                        ((ServerPlayer) this).getBukkitEntity().updateInventory();
+                    }
+                    // Paper end
                 }
 
             }