Prevent division by zero in Player#applyMending by simply using zero
instead if the divider itself is zero.
This matches vanilla behaviour in the sense that
ExperienceOrb#repairPlayerItems, which this logic is lifted from, does
pass zero to the enchantment helper and runs its first iteration on
repairing. Vanilla is not affected as the computation failing with zero
is used to compute the leftover exp value, which is not needed if zero
itself is passed in.
As the paper impl however exposes said value to the initial event, our
code needs to account for the zero division.
This resolves some issues which caused entities to not be resent correctly.
Entities that are interacted with need to be resent to the client, so we resend all the entity
data to the player whilst making sure not to clear dirty entries from the tracker. This makes
sure that values will be correctly updated to other players.
This also adds utilities to aid in further preventing entity desyncs.
This also also fixes the bug causing cancelling PlayerInteractEvent to cause items to continue
to be used despite being cancelled on the server.
For example, items being consumed but never finishing, shields being put up, etc.
The underlying issue of this is that the client modifies their synced data values,
and so we have to (forcibly) resend them in order for the client to reset their using item state.
See: https://github.com/PaperMC/Paper/pull/1896
== AT ==
public net.minecraft.server.level.ChunkMap$TrackedEntity serverEntity
Exposes the data component logic used by vanilla ItemStack to API
consumers as a version-specific API.
The types and methods introduced by this patch do not follow the general
API deprecation contracts and will be adapted to each new minecraft
release without backwards compatibility measures.
== AT ==
public net/minecraft/world/item/component/ItemContainerContents MAX_SIZE
public net/minecraft/world/item/component/ItemContainerContents items
== AT ==
public net.minecraft.core.MappedRegistry validateWrite(Lnet/minecraft/resources/ResourceKey;)V
public net.minecraft.resources.RegistryOps lookupProvider
public net.minecraft.resources.RegistryOps$HolderLookupAdapter
