geforkt von Mirrors/Paper
4104545b11
"It was from a different time before books were as jank as they are now. As time has gone on they've only proven to be worse and worse."
71 Zeilen
4.0 KiB
Diff
71 Zeilen
4.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Alphaesia <creepashadowz@gmail.com>
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Date: Fri, 23 Apr 2021 09:57:56 +1200
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Subject: [PATCH] Fix duplicating /give items on item drop cancel
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Fixes SPIGOT-2942 (Give command fires PlayerDropItemEvent, cancelling it causes item duplication).
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For every stack of items to give, /give puts the item stack straight
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into the player's inventory. However, it also summons a "fake item"
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at the player's location. When the PlayerDropItemEvent for this fake
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item is cancelled, the server attempts to put the item back into the
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player's inventory. The result is that the fake item, which is never
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meant to be obtained, is combined with the real items injected directly
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into the player's inventory. This means more items than the amount
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specified in /give are given to the player - one for every stack of
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items given. (e.g. /give @s dirt 1 gives you 2 dirt).
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While this isn't a big issue for general building usage, it can affect
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e.g. adventure maps where the number of items the player receives is
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important (and you want to restrict the player from throwing items).
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If there are any overflow items that didn't make it into the inventory
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(insufficient space), those items are dropped as a real item instead
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of a fake one. While cancelling this drop would also result in the
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server attempting to put those items into the inventory, since it is
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full this has no effect.
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Just ignoring cancellation of the PlayerDropItemEvent seems like the
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cleanest and least intrusive way to fix it.
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diff --git a/src/main/java/net/minecraft/server/commands/GiveCommand.java b/src/main/java/net/minecraft/server/commands/GiveCommand.java
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index 58941830a4bd024fcdb97df47783c82062e9167f..a0dc380e90415de9068ea408d62a1605c82631df 100644
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--- a/src/main/java/net/minecraft/server/commands/GiveCommand.java
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+++ b/src/main/java/net/minecraft/server/commands/GiveCommand.java
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@@ -47,7 +47,7 @@ public class GiveCommand {
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boolean bl = serverPlayer.getInventory().add(itemStack);
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if (bl && itemStack.isEmpty()) {
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itemStack.setCount(1);
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- ItemEntity itemEntity2 = serverPlayer.drop(itemStack, false);
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+ ItemEntity itemEntity2 = serverPlayer.drop(itemStack, false, false, true); // Paper - Fix duplicating /give items on item drop cancel
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if (itemEntity2 != null) {
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itemEntity2.makeFakeItem();
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}
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diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
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index 1b47cf893174a64dcbf3771738b6c6d443c193af..183b621cbf6fbe7cec144af69fd74461b2471142 100644
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--- a/src/main/java/net/minecraft/world/entity/player/Player.java
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+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
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@@ -689,6 +689,13 @@ public abstract class Player extends LivingEntity {
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@Nullable
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public ItemEntity drop(ItemStack stack, boolean throwRandomly, boolean retainOwnership) {
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+ // Paper start - Fix duplicating /give items on item drop cancel
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+ return this.drop(stack, throwRandomly, retainOwnership, false);
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+ }
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+
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+ @Nullable
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+ public ItemEntity drop(ItemStack stack, boolean throwRandomly, boolean retainOwnership, boolean alwaysSucceed) {
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+ // Paper end
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if (stack.isEmpty()) {
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return null;
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} else {
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@@ -730,7 +737,7 @@ public abstract class Player extends LivingEntity {
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PlayerDropItemEvent event = new PlayerDropItemEvent(player, drop);
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this.level.getCraftServer().getPluginManager().callEvent(event);
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- if (event.isCancelled()) {
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+ if (event.isCancelled() && !alwaysSucceed) { // Paper - Fix duplicating /give items on item drop cancel
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org.bukkit.inventory.ItemStack cur = player.getInventory().getItemInHand();
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if (retainOwnership && (cur == null || cur.getAmount() == 0)) {
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// The complete stack was dropped
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