From b2fd1fcbe13885c43c4120c42e01ec2dc994a8e8 Mon Sep 17 00:00:00 2001
From: CraftBukkit/Spigot <noreply+git-craftbukkit@papermc.io>
Date: Fri, 10 Jan 2020 09:50:39 +1100
Subject: [PATCH] SPIGOT-5504: cancelling InventoryMoveItemEvent on composter
 doesn't properly cancel

By: md_5 <git@md-5.net>
---
 paper-server/nms-patches/BlockComposter.patch | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/paper-server/nms-patches/BlockComposter.patch b/paper-server/nms-patches/BlockComposter.patch
index 40a299aef3..b5fc538b14 100644
--- a/paper-server/nms-patches/BlockComposter.patch
+++ b/paper-server/nms-patches/BlockComposter.patch
@@ -42,7 +42,23 @@
          }
  
          @Override
-@@ -313,8 +317,9 @@
+@@ -306,15 +310,23 @@
+ 
+         @Override
+         public void update() {
+-            BlockComposter.d(this.a, this.b, this.c);
+-            this.d = true;
++            // CraftBukkit start - allow putting items back (eg cancelled InventoryMoveItemEvent)
++            if (this.isNotEmpty()) {
++                BlockComposter.d(this.a, this.b, this.c);
++                this.d = true;
++            } else {
++                this.b.setTypeAndData(this.c, this.a, 3);
++                this.d = false;
++            }
++            // CraftBukkit end
+         }
+     }
  
      static class ContainerEmpty extends InventorySubcontainer implements IWorldInventory {