From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sun, 5 Jul 2020 00:33:54 -0700
Subject: [PATCH] added PlayerNameEntityEvent


diff --git a/src/main/java/net/minecraft/world/item/ItemNameTag.java b/src/main/java/net/minecraft/world/item/ItemNameTag.java
index 140a865f4f8fb3e4f787cf8d334d20fac6cb5eef..542ffc79cdd76d71da2c749548abca2dad2fef41 100644
--- a/src/main/java/net/minecraft/world/item/ItemNameTag.java
+++ b/src/main/java/net/minecraft/world/item/ItemNameTag.java
@@ -6,6 +6,11 @@ import net.minecraft.world.entity.EntityInsentient;
 import net.minecraft.world.entity.EntityLiving;
 import net.minecraft.world.entity.player.EntityHuman;
 
+// Paper start
+import io.papermc.paper.adventure.PaperAdventure;
+import io.papermc.paper.event.player.PlayerNameEntityEvent;
+// Paper end
+
 public class ItemNameTag extends Item {
 
     public ItemNameTag(Item.Info item_info) {
@@ -16,11 +21,15 @@ public class ItemNameTag extends Item {
     public EnumInteractionResult a(ItemStack itemstack, EntityHuman entityhuman, EntityLiving entityliving, EnumHand enumhand) {
         if (itemstack.hasName() && !(entityliving instanceof EntityHuman)) {
             if (!entityhuman.world.isClientSide && entityliving.isAlive()) {
-                entityliving.setCustomName(itemstack.getName());
-                if (entityliving instanceof EntityInsentient) {
-                    ((EntityInsentient) entityliving).setPersistent();
+                // Paper start
+                PlayerNameEntityEvent event = new PlayerNameEntityEvent(((EntityPlayer) entityhuman).getBukkitEntity(), entityliving.getBukkitLivingEntity(), PaperAdventure.asAdventure(itemstack.getName()), true);
+                if (!event.callEvent()) return EnumInteractionResult.PASS;
+                EntityLiving newEntityLiving = ((org.bukkit.craftbukkit.entity.CraftLivingEntity) event.getEntity()).getHandle();
+                newEntityLiving.setCustomName(event.getName() != null ? PaperAdventure.asVanilla(event.getName()) : null);
+                if (event.isPersistent() && newEntityLiving instanceof EntityInsentient) {
+                    ((EntityInsentient) newEntityLiving).setPersistent();
                 }
-
+                // Paper end
                 itemstack.subtract(1);
             }