Paper/patches/unapplied/server/0657-Make-EntityUnleashEvent-cancellable.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sun, 3 Jan 2021 21:25:31 -0800
Subject: [PATCH] Make EntityUnleashEvent cancellable


diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index 5b134bd0cc4c2ba20eaf275c190c139d987d9bcb..90d95dc95fe8868a4c0298acb0e1c6ce7bd883cb 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -1543,7 +1543,7 @@ public abstract class Mob extends LivingEntity implements Targeting {
         if (flag1 && this.isLeashed()) {
             // Paper start - drop leash variable
             EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.UNKNOWN, true);
-            this.level().getCraftServer().getPluginManager().callEvent(event); // CraftBukkit
+            if (!event.callEvent()) { return flag1; }
             this.dropLeash(true, event.isDropLeash());
             // Paper end
         }
diff --git a/src/main/java/net/minecraft/world/entity/PathfinderMob.java b/src/main/java/net/minecraft/world/entity/PathfinderMob.java
index a4dfe40d30a5abf5d614d0921b3b23023fdbc4b1..610bc67af915c8ff40a6c8a0d8e022e7db8614d8 100644
--- a/src/main/java/net/minecraft/world/entity/PathfinderMob.java
+++ b/src/main/java/net/minecraft/world/entity/PathfinderMob.java
@@ -51,7 +51,7 @@ public abstract class PathfinderMob extends Mob {
                 if (f > entity.level().paperConfig().misc.maxLeashDistance) { // Paper
                     // Paper start - drop leash variable
                     EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE, true);
-                    this.level().getCraftServer().getPluginManager().callEvent(event); // CraftBukkit
+                    if (!event.callEvent()) { return; }
                     this.dropLeash(true, event.isDropLeash());
                     // Paper end
                 }
@@ -63,7 +63,7 @@ public abstract class PathfinderMob extends Mob {
             if (f > entity.level().paperConfig().misc.maxLeashDistance) { // Paper
                 // Paper start - drop leash variable
                 EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE, true);
-                this.level().getCraftServer().getPluginManager().callEvent(event); // CraftBukkit
+                if (!event.callEvent()) { return; }
                 this.dropLeash(true, event.isDropLeash());
                 // Paper end
                 this.goalSelector.disableControlFlag(Goal.Flag.MOVE);