Paper/CraftBukkit-Patches/0005-Update-item-merge-logic.patch

From af7cc23dd2d34c8d0c4a26d860dbf7b4110eb331 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@bigpond.com>
Date: Sun, 23 Dec 2012 17:51:07 +1100
Subject: [PATCH] Update item merge logic

---
 src/main/java/net/minecraft/server/World.java | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 134ab73..d78d948 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -948,6 +948,7 @@ public abstract class World implements IBlockAccess {
             event = CraftEventFactory.callItemSpawnEvent((EntityItem) entity);
             // Spigot start
             ItemStack item = ((EntityItem) entity).getItemStack();
+            org.bukkit.craftbukkit.inventory.CraftItemStack craft = org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(item);
             int maxSize = item.getMaxStackSize();
             if (item.count < maxSize) {
                 double radius = this.getWorld().itemMergeRadius;
@@ -957,14 +958,12 @@ public abstract class World implements IBlockAccess {
                         if (e instanceof EntityItem) {
                             EntityItem loopItem = (EntityItem) e;
                             ItemStack loopStack = loopItem.getItemStack();
-                            if (!loopItem.dead && loopStack.id == item.id && loopStack.getData() == item.getData()) {
-                                if (loopStack.tag == null || item.tag == null || !loopStack.tag.equals(item.tag)) {
-                                    int toAdd = Math.min(loopStack.count, maxSize - item.count);
-                                    item.count += toAdd;
-                                    loopStack.count -= toAdd;
-                                    if (loopStack.count <= 0) {
-                                        loopItem.die();
-                                    }
+                            if (!loopItem.dead && craft.isSimilar(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(loopStack))) {
+                                int toAdd = Math.min(loopStack.count, maxSize - item.count);
+                                item.count += toAdd;
+                                loopStack.count -= toAdd;
+                                if (loopStack.count <= 0) {
+                                    loopItem.die();
                                 }
                             }
                         }
-- 
1.8.1-rc2