mirror of
https://github.com/PaperMC/Paper.git
synced 2024-06-25 06:14:50 +02:00
71 lines
3.8 KiB
Diff
71 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Alphaesia <creepashadowz@gmail.com>
|
|
Date: Fri, 23 Apr 2021 09:57:56 +1200
|
|
Subject: [PATCH] Fix duplicating /give items on item drop cancel
|
|
|
|
Fixes SPIGOT-2942 (Give command fires PlayerDropItemEvent, cancelling it causes item duplication).
|
|
|
|
For every stack of items to give, /give puts the item stack straight
|
|
into the player's inventory. However, it also summons a "fake item"
|
|
at the player's location. When the PlayerDropItemEvent for this fake
|
|
item is cancelled, the server attempts to put the item back into the
|
|
player's inventory. The result is that the fake item, which is never
|
|
meant to be obtained, is combined with the real items injected directly
|
|
into the player's inventory. This means more items than the amount
|
|
specified in /give are given to the player - one for every stack of
|
|
items given. (e.g. /give @s dirt 1 gives you 2 dirt).
|
|
|
|
While this isn't a big issue for general building usage, it can affect
|
|
e.g. adventure maps where the number of items the player receives is
|
|
important (and you want to restrict the player from throwing items).
|
|
|
|
If there are any overflow items that didn't make it into the inventory
|
|
(insufficient space), those items are dropped as a real item instead
|
|
of a fake one. While cancelling this drop would also result in the
|
|
server attempting to put those items into the inventory, since it is
|
|
full this has no effect.
|
|
|
|
Just ignoring cancellation of the PlayerDropItemEvent seems like the
|
|
cleanest and least intrusive way to fix it.
|
|
|
|
diff --git a/src/main/java/net/minecraft/server/commands/CommandGive.java b/src/main/java/net/minecraft/server/commands/CommandGive.java
|
|
index 6685bf1757458d908e32d4069f7a8a22a28c28d7..a10207f7cb9455e29db7e6906cb2138ad5609a1f 100644
|
|
--- a/src/main/java/net/minecraft/server/commands/CommandGive.java
|
|
+++ b/src/main/java/net/minecraft/server/commands/CommandGive.java
|
|
@@ -49,7 +49,7 @@ public class CommandGive {
|
|
|
|
if (flag && itemstack.isEmpty()) {
|
|
itemstack.setCount(1);
|
|
- entityitem = entityplayer.drop(itemstack, false);
|
|
+ entityitem = entityplayer.drop(itemstack, false, false, true); // Paper - Fix duplicating /give items on item drop cancel
|
|
if (entityitem != null) {
|
|
entityitem.s();
|
|
}
|
|
diff --git a/src/main/java/net/minecraft/world/entity/player/EntityHuman.java b/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
|
|
index ec0956a98c133bcd3d4f92f696c667eab6ff98f1..3a62bde04d7fbb6c571cfef11d4f6891e11c7ac8 100644
|
|
--- a/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
|
|
+++ b/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
|
|
@@ -642,6 +642,13 @@ public abstract class EntityHuman extends EntityLiving {
|
|
|
|
@Nullable
|
|
public EntityItem a(ItemStack itemstack, boolean flag, boolean flag1) {
|
|
+ // Paper start - Fix duplicating /give items on item drop cancel
|
|
+ return this.drop(itemstack, flag, flag1, false);
|
|
+ }
|
|
+
|
|
+ @Nullable
|
|
+ public EntityItem drop(ItemStack itemstack, boolean flag, boolean flag1, boolean alwaysSucceed) {
|
|
+ // Paper end
|
|
if (itemstack.isEmpty()) {
|
|
return null;
|
|
} else {
|
|
@@ -683,7 +690,7 @@ public abstract class EntityHuman extends EntityLiving {
|
|
PlayerDropItemEvent event = new PlayerDropItemEvent(player, drop);
|
|
this.world.getServer().getPluginManager().callEvent(event);
|
|
|
|
- if (event.isCancelled()) {
|
|
+ if (event.isCancelled() && !alwaysSucceed) { // Paper - Fix duplicating /give items on item drop cancel
|
|
org.bukkit.inventory.ItemStack cur = player.getInventory().getItemInHand();
|
|
if (flag1 && (cur == null || cur.getAmount() == 0)) {
|
|
// The complete stack was dropped
|