Paper/patches/server/0071-Custom-replacement-for-eaten-items.patch
Spottedleaf 01a13871de
Rewrite chunk system (#8177)
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 01:02:51 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Sun, 21 Jun 2015 15:07:20 -0400
Subject: [PATCH] Custom replacement for eaten items
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 4e192c98b7beb23ac75b7442883eba7bb98dc475..5678461976a07f9afecccb1d34ea3eec24fba80e 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3611,9 +3611,10 @@ public abstract class LivingEntity extends Entity {
this.triggerItemUseEffects(this.useItem, 16);
// CraftBukkit start - fire PlayerItemConsumeEvent
ItemStack itemstack;
+ PlayerItemConsumeEvent event = null; // Paper
if (this instanceof ServerPlayer) {
org.bukkit.inventory.ItemStack craftItem = CraftItemStack.asBukkitCopy(this.useItem);
- PlayerItemConsumeEvent event = new PlayerItemConsumeEvent((Player) this.getBukkitEntity(), craftItem);
+ event = new PlayerItemConsumeEvent((Player) this.getBukkitEntity(), craftItem); // Paper
level.getCraftServer().getPluginManager().callEvent(event);
if (event.isCancelled()) {
@@ -3627,6 +3628,13 @@ public abstract class LivingEntity extends Entity {
} else {
itemstack = this.useItem.finishUsingItem(this.level, this);
}
+
+ // Paper start - save the default replacement item and change it if necessary
+ final ItemStack defaultReplacement = itemstack;
+ if (event != null && event.getReplacement() != null) {
+ itemstack = CraftItemStack.asNMSCopy(event.getReplacement());
+ }
+ // Paper end
// CraftBukkit end
if (itemstack != this.useItem) {
@@ -3634,6 +3642,11 @@ public abstract class LivingEntity extends Entity {
}
this.stopUsingItem();
+ // Paper start - if the replacement is anything but the default, update the client inventory
+ if (this instanceof ServerPlayer && !com.google.common.base.Objects.equal(defaultReplacement, itemstack)) {
+ ((ServerPlayer) this).getBukkitEntity().updateInventory();
+ }
+ // Paper end
}
}