From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Tue, 16 May 2017 21:29:08 -0500
Subject: [PATCH] Add option to make parrots stay on shoulders despite movement

Makes parrots not fall off whenever the player changes height, or touches water, or gets hit by a passing leaf.
Instead, switches the behavior so that players have to sneak to make the birds leave.

I suspect Mojang may switch to this behavior before full release.

To be converted into a Paper-API event at some point in the future?

== AT ==
public net.minecraft.world.entity.player.Player removeEntitiesOnShoulder()V

diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 4c689d2a794e53a2d9915f1ba46435c41bfa74e9..03bc7ae947360a721fef5a772ecadb4a18ac73b2 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2184,6 +2184,13 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
         switch (packet.getAction()) {
             case PRESS_SHIFT_KEY:
                 this.player.setShiftKeyDown(true);
+
+                // Paper start - Add option to make parrots stay
+                if (this.player.level().paperConfig().entities.behavior.parrotsAreUnaffectedByPlayerMovement) {
+                    this.player.removeEntitiesOnShoulder();
+                }
+                // Paper end - Add option to make parrots stay
+
                 break;
             case RELEASE_SHIFT_KEY:
                 this.player.setShiftKeyDown(false);
diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
index 86d187cadb73dbe0757f9417c4549e358ff303ca..5bac265d9c13da9aceabbd7520cb2ab5fb14b68c 100644
--- a/src/main/java/net/minecraft/world/entity/player/Player.java
+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
@@ -589,6 +589,7 @@ public abstract class Player extends LivingEntity {
         this.playShoulderEntityAmbientSound(this.getShoulderEntityLeft());
         this.playShoulderEntityAmbientSound(this.getShoulderEntityRight());
         if (!this.level().isClientSide && (this.fallDistance > 0.5F || this.isInWater()) || this.abilities.flying || this.isSleeping() || this.isInPowderSnow) {
+            if (!this.level().paperConfig().entities.behavior.parrotsAreUnaffectedByPlayerMovement) // Paper - Add option to make parrots stay
             this.removeEntitiesOnShoulder();
         }