The brigadier command dispatcher is not capable of executing commands
that redirect more than one.
The exemplary alias 'minecraft:tp' may hence not redirect to 'tp' it
instead has to redirect to 'teleport' as 'tp' itself is merely a
redirect.
There is no need to rewrap vanilla goals when they're being reregistered,
this breaks some expectations around behavior outside of general
wasting of resources.
Resolves: #10743
Allows using the PluginLoader API without any of the other changes imposed by switching to a paper-plugin.yml.
Used by setting paper-plugin-loader in plugin.yml to the class name of your PluginLoader.
Also allows skipping the libraries field by setting paper-skip-libraries to true (by default both libraries and jars provided by the PluginLoader are added to the classpath).
The patch does not implement Vanilla forceUpgrade behavior.
Specifically, poi/entity conversion and regionfile recreation.
The Vanilla force upgrader is also no longer broken by CB, so the
bug fixes from this patch are not relevant anymore.
Fixes NPE when converting namespaced commands.
Since the brigadier command api, more aliased commands
(namespaced variants) are registered in the vanilla dispatcher,
which made this issue more apparent.
Instead of allowing chunks to fail to convert completely,
simply log the exception and the offending command. Command
conversion failure should never result in chunk data deletion,
as commands are not critical chunk data.
Prevent infinite recursion when declaring a cyclic relation between
command nodes via child nodes redirecting to an nth parent by marking a
command node as unwrapped before unwrapping its children.
Updated Upstream (Bukkit/CraftBukkit)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
fa99e752 PR-1007: Add ItemMeta#getAsComponentString()
94a91782 Fix copy-pasted BlockType.Typed documentation
9b34ac8c Largely restore deprecated PotionData API
51a6449b PR-1008: Deprecate ITEMS_TOOLS, removed in 1.20.5
702d15fe Fix Javadoc reference
42f6cdf4 PR-919: Add internal ItemType and BlockType, delegate Material methods to them
237bb37b SPIGOT-1166, SPIGOT-7647: Expose Damager BlockState in EntityDamageByBlockEvent
035ea146 SPIGOT-6993: Allow #setVelocity to change the speed of a fireball and add a note to #setDirection about it
8c7880fb PR-1004: Improve field rename handling and centralize conversion between bukkit and string more
87c90e93 SPIGOT-7650: Add DamageSource for EntityDeathEvent and PlayerDeathEvent
CraftBukkit Changes:
4af0f22e8 SPIGOT-7664: Item meta should prevail over block states
c2ccc46ec SPIGOT-7666: Fix access to llama and horse special slot
124ac66d7 SPIGOT-7665: Fix ThrownPotion#getEffects() implementation only bringing custom effects
66f1f439a Restore null page behaviour of signed books even though not strictly allowed by API
6118e5398 Fix regression listening to minecraft:brand custom payloads
c1a26b366 Fix unnecessary and potential not thread-safe chat visibility check
12360a7ec Remove unused imports
147b098b4 PR-1397: Add ItemMeta#getAsComponentString()
428aefe0e Largely restore deprecated PotionData API
afe5b5ee9 PR-1275: Add internal ItemType and BlockType, delegate Material methods to them
8afeafa7d SPIGOT-1166, SPIGOT-7647: Expose Damager BlockState in EntityDamageByBlockEvent
4e7d749d4 SPIGOT-6993: Allow #setVelocity to change the speed of a fireball and add a note to #setDirection about it
441880757 Support both entity_data and bucket_entity_data on axolotl/fish buckets
0e22fdd1e Fix custom direct BlockState being not correctly set in DamageSource
f2182ed47 SPIGOT-7659: TropicalFishBucketMeta should use BUCKET_ENTITY_DATA
2a6207fe1 PR-1393: Improve field rename handling and centralize conversion between bukkit and string more
c024a5039 SPIGOT-7650: Add DamageSource for EntityDeathEvent and PlayerDeathEvent
741b84480 PR-1390: Improve internal handling of damage sources
0364df4e1 SPIGOT-7657: Error when loading angry entities
Adds the ability for plugins to register their own brigadier commands
---------
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
Co-authored-by: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Co-authored-by: Bjarne Koll <lynxplay101@gmail.com>
- The old code was using `StringReader.peek()` in a place where it meant to be `StringReader.skip()`.
- The vanilla code allows a trailing comma, but only if there is no whitespace between it and the closing bracket, which is a bit weird. I think that's a bug and it shouldn't allow trailing commas, but if you disagree then only the first issue needs to be fixed.
The old read() method should just redirect to the new
chunk system method, however due to an error in moving
the chunk system patch around the data version check was
left in the old (UNUSED) read() method.
The configuration should not allow the cache to break. Additionally,
invalidating the cache is cheap and as such there is no gain to avoid
invalidating it.
The delta position packet instructs the client to update
the entity position by a position difference. However, this position
difference is relative to the last position in the entity tracker
state, not the last position which has been sent to the player. As
a result, if the last position the player has recorded is different
than the one stored in the entity tracker (which occurs when a new
player is added to an existing entity tracker state) then the sent
position difference will cause a position desync for the client.
We can resolve this problem by either tracking the last position
sent per-player, or by simply resetting the last sent position
in the entity tracker state every time a new player is added.
Resetting the last sent position every time a new player is
added to the tracker is just easier to do, so that is what
this patch does.
* Fixes CraftMetaBlockState block entity data components
* rebase and merge into general item meta fix
* Add javadoc notice
* Update message
---------
Co-authored-by: Bjarne Koll <lynxplay101@gmail.com>
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
66fd94322 SPIGOT-7652: Remove remap for SPELL_MOB_AMBIENT which no longer exists
ecfa4f973 SPIGOT-7654: ItemStack#isSimilar does not work with empty BlockStateMeta
4460ecc49 SPIGOT-7655: ItemMeta#addItemFlags(ItemFlag.HIDE_ATTRIBUTES) not working when no attribute modifiers set
5d84f48a4 SPIGOT-7653: Update ApiVersion.CURRENT with latest version and include tests
The craftbukkit implementation stores the old and new data patch of an
item during ItemStack#useOn(UseOnContext) to properly cancel events via
comparison and change detection of the component patch.
However, it uses #getComponentsPatch to fetch the new stack component
patch, which always yields an empty patch set if an itemstack is
considered empty by the game.
As the restoration of an itemstack's count to its previous state is
handled after the entire ItemStack#useOn method, items used in creative
mode temporarily have a count of zero, which causes craftbukkit to
consider their new component patch as EMPTY even tho said item may have
data.
The new patch is applied and, after useOn completes, the count is reset
if the player is in creative mode, leading to lost data.
This commit fixes said inconsistency by directly accessing the
components of the item via components#asPatch, storing the proper
component patch even for an item that temporarily has a count of zero.
* add RegistryAccess for managing registries
* add missing types to key data generator
* fix some stuff
* Add RegistryKeys for all other non-server-backed registries
* fix tests
* remove Experimental annotations
With plugins adopting paperweights mapping namespaces in their manifest
file in and after paper 1.20.5, incorrectly spelled namespaces
previously were simply implied as the spigot namespace.
This commit properly ensures plugin authors are using a known mapping
namespace in their manifest, avoiding down the line confusion on
incorrect remapping behaviour.
The commit also fixes two incorrect log parameters.
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
304e83eb PR-1002: Improve documentation and implementation of getMaxStackSize
e8215ea2 SPIGOT-7638: Library loader does not seem to resolve every dependency
79c595c0 SPIGOT-7637: Bad logic in checking nullability of AttributeModifier slots
CraftBukkit Changes:
91b1fc3f1 SPIGOT-7644: Fix ItemMeta#getAsString
4e77a81e1 SPIGOT-7615: PlayerLeashEntityEvent cancelled eats lead
996f660f3 Do not remove leash knot if leasing to an existing leash knot gets cancelled
f70367d42 SPIGOT-7643: Fix inverted leash event cancelled usage and remove leash knot if no entity gets leashed
7ddb48294 SPIGOT-7640: Abnormal jumping height of wind charge
080c8711e SPIGOT-7639: Incoming plugin channels not working
ad549847e Open a direct connection instead of pinging mojang server to check if it is reachable
38e2926c5 SPIGOT-7365: DamageCause blocked by shield should trigger invulnerableTime
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
69fa4695 Add some missing deprecation annotations
f850da2e Update Maven plugins/versions
8d8400db Use regular compiler seeing as ECJ doesn't support Java 21 JRE
c29e1688 Revert "BUILDTOOLS-676: Downgrade Maven compiler version"
07bce714 SPIGOT-7355: More field renames and fixes
6a8ea764 Fix bad merge in penultimate commit
50a7920c Fix imports in previous commit
83640dd1 PR-995: Add required feature to MinecraftExperimental for easy lookups
fc1f96cf BUILDTOOLS-676: Downgrade Maven compiler version
CraftBukkit Changes:
90f1059ba Fix item placement
661afb43c SPIGOT-7633: Clearer error message for missing particle data
807b465b3 SPIGOT-7634: Armadillo updates infrequently
590cf09a8 Fix unit tests always seeing Mojang server as unavailable
7c7ac5eb2 SPIGOT-7636: Fix clearing ItemMeta
4a72905cf SPIGOT-7635: Fix Player#transfer and cookie methods
ebb50e136 Fix incorrect Vault implementation
b33fed8b7 Update Maven plugins/versions
6f00f0608 SPIGOT-7632: Control middle clicking chest does not copy contents
db821f405 Use regular compiler seeing as ECJ doesn't support Java 21 JRE
8a2976737 Revert "BUILDTOOLS-676: Downgrade Maven compiler version"
0297f87bb SPIGOT-7355: More field renames and fixes
2d03bdf6a SPIGOT-7629: Fix loading banner patterns
e77951fac Fix equality of deserialized display names
c66f3e4fd SPIGOT-7631: Fix deserialisation of BlockStateMeta
9c2c7be8d SPIGOT-7630: Fix crash saving unticked leashed entities
8c1e7c841 PR-1384: Disable certain PlayerProfile tests, if Mojang's services or internet are not available
ced93d572 SPIGOT-7626: sendSignChange() has no effect
c77362cae SPIGOT-7625: ItemStack with lore cannot be serialized in 1.20.5
ff2004387 SPIGOT-7620: Fix server crash when hoppers transfer items to double chests
8b4abeb03 BUILDTOOLS-676: Downgrade Maven compiler version
The Enchantment damage increase API added previously used the
EntityCategory enum as a parameter. These values are now however
determined by tags instead of the categories themselves.
Deprecated the outdated api method, create a new overload that takes
EntityType instead and implement deprecated method by guessing an entity
type from the builtin registry based on the category passed.
This method allows
a) the tags to still be modified and the legacy
method still respecting such.
b) potential cursed implementations of enchantments of plugins to not
break that override the getDamageBonus method on Enchantment.
* Stop firing AsyncPlayerChatPreviewEvent as chat preview was removed in 1.19.3. This is in parity with upstream
* formatting and small tweaks
* correctly set MESSAGE_CHANGED flag for modern modifications
---------
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
paper previously migrated away from using executeIfPossible as this throws a
RejectedExecutionException when the server is shutting down, which is then picked
up by the Connection handler object and causes the player to be kicked without
the intended disconnection message that comes from commands such as /stop, /restart
This was fine, because previously changes made in spigot would just prevent these
packets from being executed anyways. Instead, we'll just use a marker exception
to try to detect this specific state.
* Update patches to handle vineflower decompiler
* update patches again to handle inlined simple lambdas
* update vf again and re-apply/rebuild patches
* update patches after removal of verify-merges flag
* fix compile issue
* remove maven local
* fix some issues
* address more issues
* fix collision patch
* use paperweight release
* more fixes
* update fineflower and fix patches again
* add missing comment descriptor
---------
Co-authored-by: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Updated Upstream (Bukkit/CraftBukkit)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
f02baa38 PR-988: Add World#getIntersectingChunks(BoundingBox)
9321d665 Move getItemInUse up to LivingEntity
819eef73 PR-959: Add access to current item's remaining ticks
c4fdadb0 SPIGOT-7601: Add AbstractArrow#getItem
be8261ca Add support for Java 22
26119676 PR-979: Add more translation keys
66753362 PR-985: Correct book maximum pages and characters per page documentation
c8be92fa PR-980: Improve getArmorContents() documentation
f1120ee2 PR-983: Expose riptide velocity to PlayerRiptideEvent
CraftBukkit Changes:
dfaa89bbe PR-1369: Add World#getIntersectingChunks(BoundingBox)
51bbab2b9 Move getItemInUse up to LivingEntity
668e09602 PR-1331: Add access to current item's remaining ticks
a639406d1 SPIGOT-7601: Add AbstractArrow#getItem
0398930fc SPIGOT-7602: Allow opening in-world horse and related inventories
ffd15611c SPIGOT-7608: Allow empty lists to morph to any PDT list
2188dcfa9 Add support for Java 22
45d6a609f SPIGOT-7604: Revert "SPIGOT-7365: DamageCause blocked by shield should trigger invulnerableTime"
06d915943 SPIGOT-7365: DamageCause blocked by shield should trigger invulnerableTime
ca3bc3707 PR-1361: Add more translation keys
366c3ca80 SPIGOT-7600: EntityChangeBlockEvent is not fired for frog eggs
06d0f9ba8 SPIGOT-7593: Fix sapling growth physics / client-side updates
45c2608e4 PR-1366: Expose riptide velocity to PlayerRiptideEvent
29b6bb79b SPIGOT-7587: Remove fixes for now-resolved MC-142590 and MC-109346
* Compile against & shade the filtered jar
* Move check for if the paper asset root needs to be pushed
* Don't disable incremental compilation
* Remove mavenLocal
* use paperweight release
Previously paper disabled the abilities for entities to teleport via end
gateways if they were being used as a vehicle.
While the behaviour generally worked fine for entities riding other
entities, players would quickly end up in an invalid state, not seeing
their passenger anymore.
This commit removes the paper introduced limitation by now properly
updating the passengers location of a player when they are teleporting
through an end gateway.
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
7ca2b46c SPIGOT-7594: Fix typo and include missing MinecraftExperimental annotation in Loot Table enum
CraftBukkit Changes:
176c0ad39 Fix copying BlockStates with fields (eg, Banner)
ee685bd2a Fix Camel not standing up when hurt
619936d4b Increase outdated build delay
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.
It should be noted that this decision does not promise all future exploits will be configurable.
The existing method with PotionEffect suggests that all attributes are used. In fact, only the PotionEffectType and the duration are used.
---------
Co-authored-by: Bjarne Koll <lynxplay101@gmail.com>
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
9a80d38c SPIGOT-336, SPIGOT-3366, SPIGOT-5768, SPIGOT-6409, SPIGOT-6861, PR-722: Add EntityRemoveEvent
258086d9 SPIGOT-7417, PR-967: Add Sign#getTargetSide and Sign#getAllowedEditor
ffaba051 SPIGOT-7584: Add missing Tag.ITEMS_NON_FLAMMABLE_WOOD
CraftBukkit Changes:
98b6c1ac7 SPIGOT-7589 Fix NullPointerException when bans expire
a2736ddb0 SPIGOT-336, SPIGOT-3366, SPIGOT-5768, SPIGOT-6409, SPIGOT-6861, PR-1008: Add EntityRemoveEvent
5bf12cb89 SPIGOT-7565: Throw a more descriptive error message when a developer tries to spawn an entity from a CraftBukkit class
76d95fe7e SPIGOT-7417, PR-1343: Add Sign#getTargetSide and Sign#getAllowedEditor
Spigot Changes:
e9ec5485 Rebuild patches
f1b62e0c Rebuild patches
* feat: number format api
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: make each individual score customizable
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* docs: fix incorrect descriptions
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: use access transformers
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: use adventure codecs
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* test: test for matching styles
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: convert number formats to interfaces
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: add style conversion to adventure patch
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: use paper adventure method in PaperScoreboardFormat
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* chore: rename methods to avoid a method in records
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* fix: check if objective is still registered
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: improve style conversion
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: modify how the getter behaves in score
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: use fluent naming
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* docs: add spaces before the paper comments
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* chore: styling changes
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* chore: make constant final
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* feat: add methods for styled format instead of constants
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* fix: remove incorrect getTrackedPlayers check
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* docs: add . at the end of sentences
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* docs: explain null behaviour
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* docs: mention score creation
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
* rebase and fix javadoc comments
* remove server implementation defaults
* fix format for PaperScoreboardFormat
---------
Signed-off-by: David Mayr <davidliebtkekse@gmail.com>
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
* Updated Upstream (Bukkit/CraftBukkit)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
a6a9d2a4 Remove some old ApiStatus.Experimental annotations
be72314c SPIGOT-7300, PR-829: Add new DamageSource API providing enhanced information about entity damage
b252cf05 SPIGOT-7576, PR-970: Add methods in MushroomCow to change stew effects
b1c689bd PR-902: Add Server#isLoggingIPs to get log-ips configuration
08f86d1c PR-971: Add Player methods for client-side potion effects
2e3024a9 PR-963: Add API for in-world structures
a23292a7 SPIGOT-7530, PR-948: Improve Resource Pack API with new 1.20.3 functionality
1851857b SPIGOT-3071, PR-969: Add entity spawn method with spawn reason
cde4c52a SPIGOT-5553, PR-964: Add EntityKnockbackEvent
CraftBukkit Changes:
38fd4bd50 Fix accidentally renamed internal damage method
80f0ce4be SPIGOT-7300, PR-1180: Add new DamageSource API providing enhanced information about entity damage
7e43f3b16 SPIGOT-7581: Fix typo in BlockMushroom
ea14b7d90 SPIGOT-7576, PR-1347: Add methods in MushroomCow to change stew effects
4c687f243 PR-1259: Add Server#isLoggingIPs to get log-ips configuration
22a541a29 Improve support for per-world game rules
cb7dccce2 PR-1348: Add Player methods for client-side potion effects
b8d6109f0 PR-1335: Add API for in-world structures
4398a1b5b SPIGOT-7577: Make CraftWindCharge#explode discard the entity
e74107678 Fix Crafter maximum stack size
0bb0f4f6a SPIGOT-7530, PR-1314: Improve Resource Pack API with new 1.20.3 functionality
4949f556d SPIGOT-3071, PR-1345: Add entity spawn method with spawn reason
20ac73ca2 PR-1353: Fix Structure#place not working as documented with 0 palette
3c1b77871 SPIGOT-6911, PR-1349: Change max book length in CraftMetaBook
333701839 SPIGOT-7572: Bee nests generated without bees
f48f4174c SPIGOT-5553, PR-1336: Add EntityKnockbackEvent
* registering stuff event system
* simply by removing a ton of unneeded generics
* separate RegistryEvent and RegistrarEvent
* add logic for removing hooks when a plugin is disabled
* cleanup more
* swap around the way things are registered
* block further hook registrations for JavaPlugin
* Slightly more extensible to support registry mod API
* rename some types
* more moving/renaming
* remove 'hook' name
* Rename to 'lifecycle'
* move more impls for the server
* add priorities
* added lock for bootstrap event registration
* slight refactor to allow 'register anywhere' event types
* Move event type list to server impl
* use builder pattern to create event handler configurations
* add some more javadocs
* fix some issues, slight refactors
* call predicate and method renames
* add owner aware events
* rebased and refactored owner aware events
* add single helper method for registering simple handler
* compile fixes
* check owner and fix generics on register helper
* javadoc fixes and a few type renames
* more javadoc fixes
* move service loader file to correct location
* rename to Monitorable and Prioritizable
* add invalidation system for events after running them
* block reloading plugins in certain situations
* update test plugin
* remove dummy events
* rebase
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
1d522878 PR-966: Introduce getRespawnLocation as a replacement for getBedSpawnLocation
cc01b745 PR-965: Add DragonBattle#setPreviouslyKilled
28e3702f SPIGOT-6921, PR-957: Add methods to remove all enchantments on an ItemStack
8872404e PR-961: Add BlockData#copyTo
4054cc7b PR-956: Add method to get an offline player's location
CraftBukkit Changes:
292ec79e0 SPIGOT-7568: Call EntityChangeBlockEvent for DecoratedPot
b44bf5aa8 SPIGOT-7575: SuspiciousStewMeta creates invalid PotionEffect data
161784713 PR-1340: Centralize the conversion from and to Minecraft / Bukkit registry items even more and add a test case for them
b93c5a30d PR-1338: Introduce getRespawnLocation as a replacement for getBedSpawnLocation
fb973486c SPIGOT-7570: PrepareItemCraftEvent#isRepair() always returns false
c9c24535e PR-1337: Add DragonBattle#setPreviouslyKilled
c8b4da803 SPIGOT-6921, PR-1330: Add methods to remove all enchantments on an ItemStack
95bc1c4f5 PR-1333: Add BlockData#copyTo
36e2f9ce1 PR-1329: Add method to get an offline player's location
Spigot Changes:
c198da22 SPIGOT-7563: Update to latest release of bungeecord-chat
When a plugin listens to the EntityAddToWorld and EntityRemoveFromWorld events, I don't believe there is currently any method of directly obtaining which world the entity was actually added to/removed from. Using event.getEntity().getWorld() works in many cases, but not all. Specifically, when an entity is teleported from one world to another, the location of the entity is updated prior to the removal event being called. This means that when an entity goes through a nether/end portal or is teleported between worlds with a command, a plugin listening to the EntityRemoveFromWorldEvent has no way of determining which world the entity was actually removed from (without relying on other events).
To resolve this, I've added the world as a field in the events along with a getter to retrieve it. I also removed an unused import and made the documentation more clear on the event behaviour when chunks load/unload.
