From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 18 Mar 2016 14:19:19 -0400
Subject: [PATCH] Undead horse leashing

default false to match vanilla, but option to allow undead horse types to be leashed.

diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 04430aae52205ee167662004e45c145b9d2e8bed..dd21221534542d0265fa7d2178ab69c236579cf7 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -208,4 +208,9 @@ public class PaperWorldConfig {
     private void nonPlayerEntitiesOnScoreboards() {
         nonPlayerEntitiesOnScoreboards = getBoolean("allow-non-player-entities-on-scoreboards", false);
     }
+
+    public boolean allowLeashingUndeadHorse = false;
+    private void allowLeashingUndeadHorse() {
+        allowLeashingUndeadHorse = getBoolean("allow-leashing-undead-horse", false);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/EntityHorseAbstract.java b/src/main/java/net/minecraft/server/EntityHorseAbstract.java
index 364697e0155012c300219ad94a3995809e6c2f8f..d45d025fa74a5ff53f0828f51639e19613e30186 100644
--- a/src/main/java/net/minecraft/server/EntityHorseAbstract.java
+++ b/src/main/java/net/minecraft/server/EntityHorseAbstract.java
@@ -106,6 +106,13 @@ public abstract class EntityHorseAbstract extends EntityAnimal implements IInven
         this.bx = flag;
     }
 
+    // Paper start
+    @Override
+    public boolean a(EntityHuman entityhuman) {
+        return world.paperConfig.allowLeashingUndeadHorse ? super.a(entityhuman) : super.a(entityhuman) && this.getMonsterType() != EnumMonsterType.UNDEAD; // Paper
+    }
+    // Paper end
+
     @Override
     protected void t(float f) {
         if (f > 6.0F && this.fa()) {
diff --git a/src/main/java/net/minecraft/server/EntityInsentient.java b/src/main/java/net/minecraft/server/EntityInsentient.java
index 9715f10c790c0210435622ab9997ac40f98da185..2f85d9799d67d3fb1d340179d8dbd03771467329 100644
--- a/src/main/java/net/minecraft/server/EntityInsentient.java
+++ b/src/main/java/net/minecraft/server/EntityInsentient.java
@@ -1282,7 +1282,7 @@ public abstract class EntityInsentient extends EntityLiving {
 
     }
 
-    public boolean a(EntityHuman entityhuman) {
+    public boolean a(EntityHuman entityhuman) { // Paper - overriden in EntityHorseAbstract
         return !this.isLeashed() && !(this instanceof IMonster);
     }