PaperMC/Remapped-Spigot-Server-Patches/0754-Reset-villager-inventory-on-cancelled-pickup-event.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <blake.galbreath@gmail.com>
Date: Tue, 1 Jun 2021 22:05:08 -0500
Subject: [PATCH] Reset villager inventory on cancelled pickup event


diff --git a/src/main/java/net/minecraft/world/SimpleContainer.java b/src/main/java/net/minecraft/world/SimpleContainer.java
index d6bb1d540e6dcbbad5e5bdf54803c495a4f3e771..3e639f5af83bea6760669696425dffd2d741cc16 100644
--- a/src/main/java/net/minecraft/world/SimpleContainer.java
+++ b/src/main/java/net/minecraft/world/SimpleContainer.java
@@ -34,6 +34,16 @@ public class SimpleContainer implements Container, StackedContentsCompatible {
         return this.items;
     }
 
+    // Paper start
+    public void setContents(List<ItemStack> items) {
+        this.items.clear();
+        for(int i = 0; i < items.size(); i++) {
+            this.items.set(i, items.get(i));
+        }
+        this.setChanged();
+    }
+    // Paper end
+
     public void onOpen(CraftHumanEntity who) {
         transaction.add(who);
     }
@@ -148,6 +158,7 @@ public class SimpleContainer implements Container, StackedContentsCompatible {
         return itemstack;
     }
 
+    public ItemStack addItem(ItemStack itemstack) { return addItem(itemstack); } // Paper - OBFHELPER
     public ItemStack addItem(ItemStack stack) {
         ItemStack itemstack1 = stack.copy();
 
diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java
index 7817071b1964b962c8f4017d5bb39d74ca0ca3e4..1fbb7a2db5c362a5fc9e3f81382f729c962e377b 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -844,15 +844,19 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
             }
 
             // CraftBukkit start
-            ItemStack remaining = new SimpleContainer(inventorysubcontainer).addItem(itemstack);
-            if (CraftEventFactory.callEntityPickupItemEvent(this, item, remaining.getCount(), false).isCancelled()) {
+            // Paper start
+            List<ItemStack> contentsSnapshot = new java.util.ArrayList<>(inventorysubcontainer.getContents());
+            ItemStack itemstack1 = inventorysubcontainer.addItem(itemstack);
+            if (CraftEventFactory.callEntityPickupItemEvent(this, item, itemstack1.getCount(), false).isCancelled()) {
+                inventorysubcontainer.setContents(contentsSnapshot);
+                // Paper end
                 return;
             }
             // CraftBukkit end
 
             this.onItemPickup(item);
             this.take(item, itemstack.getCount());
-            ItemStack itemstack1 = inventorysubcontainer.addItem(itemstack);
+            // ItemStack itemstack1 = inventorysubcontainer.a(itemstack); // Paper - moved up
 
             if (itemstack1.isEmpty()) {
                 item.remove();