Fixes incorrect spigot handling of the invulnerability damage
reduction applied when an already invulnerable entity is damaged with a
larger damage amount than the initial damage.
Vanilla still damages entities even if invulnerable if the damage to be
applied is larger than the previous damage taken. In that case, vanilla
applies the difference between the previous damage taken and the
proposed damage.
Spigot's damage modifier API takes over the computation of damage
reducing effects, however spigot invokes this handling with the initial
damage before computing the difference to the previous damage amount.
This leads to the reduction values to generally be larger than expected,
as they are computed on the not-yet-reduced value.
Spigot applies these reductions after calling the EntityDamageEvent and
*then* subtracts the previous damage point, leading to the final damage
amount being smaller than expected.
This patch cannot simply call the EntityDamageEvent with the reduced
damage, as that would lead to EntityDamageEvent#getDamage() returning
the already reduced damage, which breaks its method contract.
Instead, this patch makes use of the DamageModifier API, implementing
the last-damage-reduction as a DamageModifier.
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.
Anvils, by default, limit applied enchantment levels to their respective
maximum level. The added API enables plugins to disable this behaviour,
allowing enchantments that are overleveled to be applied via the anvil.
Prevent index out of bounds exception when finding possible matches in
the help topics.
A general empty string is caught and directed to the defaultTopic by
getHelpTopic(). #findPossibleMatches hence should not concern itself
with possible empty strings anymore.
Improves the validation when creating recipes
and RecipeChoices to closer match what is
allowed by the Codecs and StreamCodecs internally.
Adds RecipeChoice#empty which is allowed in specific
recipes and ingredient slots.
Also fixes some issues regarding mutability of both ItemStack
and implementations of RecipeChoice.
Also adds some validation regarding Materials passed to RecipeChoice
being items.
Adds new flag in HIDE_STORED_ENCHANTS which was split
from HIDE_ADDITIONAL_INFO. Adds a migration to account for
this, adding the new flag if the itemstack is old and had the
old flag.
