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PaperMC/patches/server/0908-Fire-EntityChangeBlockEvent-in-more-places.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: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 9 Aug 2021 20:45:46 -0700
Subject: [PATCH] Fire EntityChangeBlockEvent in more places
Co-authored-by: ChristopheG <61288881+chrisgdt@users.noreply.github.com>
diff --git a/src/main/java/net/minecraft/world/entity/LightningBolt.java b/src/main/java/net/minecraft/world/entity/LightningBolt.java
index 359c78b4f98c38c81af27a2c4cf0939da51e5a0b..50612c00f53821ccafce94835caf1ba442be299a 100644
--- a/src/main/java/net/minecraft/world/entity/LightningBolt.java
+++ b/src/main/java/net/minecraft/world/entity/LightningBolt.java
@@ -100,7 +100,7 @@ public class LightningBolt extends Entity {
}
this.powerLightningRod();
- LightningBolt.clearCopperOnLightningStrike(this.level, this.getStrikePosition());
+ LightningBolt.clearCopperOnLightningStrike(this.level, this.getStrikePosition(), this); // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
this.gameEvent(GameEvent.LIGHTNING_STRIKE);
}
}
@@ -194,7 +194,7 @@ public class LightningBolt extends Entity {
}
}
- private static void clearCopperOnLightningStrike(Level world, BlockPos pos) {
+ private static void clearCopperOnLightningStrike(Level world, BlockPos pos, Entity lightning) { // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
BlockState iblockdata = world.getBlockState(pos);
BlockPos blockposition1;
BlockState iblockdata1;
@@ -208,24 +208,29 @@ public class LightningBolt extends Entity {
}
if (iblockdata1.getBlock() instanceof WeatheringCopper) {
- world.setBlockAndUpdate(blockposition1, WeatheringCopper.getFirst(world.getBlockState(blockposition1)));
+ // Paper start - call EntityChangeBlockEvent
+ BlockState newBlock = WeatheringCopper.getFirst(world.getBlockState(blockposition1));
+ if (!CraftEventFactory.callEntityChangeBlockEvent(lightning, blockposition1, newBlock).isCancelled()) {
+ world.setBlockAndUpdate(blockposition1, newBlock);
+ }
+ // Paper end
BlockPos.MutableBlockPos blockposition_mutableblockposition = pos.mutable();
int i = world.random.nextInt(3) + 3;
for (int j = 0; j < i; ++j) {
int k = world.random.nextInt(8) + 1;
- LightningBolt.randomWalkCleaningCopper(world, blockposition1, blockposition_mutableblockposition, k);
+ LightningBolt.randomWalkCleaningCopper(world, blockposition1, blockposition_mutableblockposition, k, lightning); // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
}
}
}
- private static void randomWalkCleaningCopper(Level world, BlockPos pos, BlockPos.MutableBlockPos mutablePos, int count) {
+ private static void randomWalkCleaningCopper(Level world, BlockPos pos, BlockPos.MutableBlockPos mutablePos, int count, Entity lightning) { // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
mutablePos.set(pos);
for (int j = 0; j < count; ++j) {
- Optional<BlockPos> optional = LightningBolt.randomStepCleaningCopper(world, mutablePos);
+ Optional<BlockPos> optional = LightningBolt.randomStepCleaningCopper(world, mutablePos, lightning); // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
if (!optional.isPresent()) {
break;
@@ -236,7 +241,7 @@ public class LightningBolt extends Entity {
}
- private static Optional<BlockPos> randomStepCleaningCopper(Level world, BlockPos pos) {
+ private static Optional<BlockPos> randomStepCleaningCopper(Level world, BlockPos pos, Entity lightning) { // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
Iterator iterator = BlockPos.randomInCube(world.random, 10, pos, 1).iterator();
BlockPos blockposition1;
@@ -253,6 +258,7 @@ public class LightningBolt extends Entity {
BlockPos blockposition1Final = blockposition1; // CraftBukkit - decompile error
WeatheringCopper.getPrevious(iblockdata).ifPresent((iblockdata1) -> {
+ if (!CraftEventFactory.callEntityChangeBlockEvent(lightning, blockposition1Final, iblockdata1).isCancelled()) // Paper - call EntityChangeBlockEvent
world.setBlockAndUpdate(blockposition1Final, iblockdata1); // CraftBukkit - decompile error
});
world.levelEvent(3002, blockposition1, -1);
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java b/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java
index 09457cb957d8fef403198b027b33d310e5e5169f..3e7e79e8bf6abfa639a69b827a46047569ad1b0a 100644
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java
@@ -37,6 +37,12 @@ public class TryLaySpawnOnWaterNearLand extends Behavior<Frog> {
if (world.getBlockState(blockPos2).getCollisionShape(world, blockPos2).getFaceShape(Direction.UP).isEmpty() && world.getFluidState(blockPos2).is(Fluids.WATER)) {
BlockPos blockPos3 = blockPos2.above();
if (world.getBlockState(blockPos3).isAir()) {
+ // Paper start
+ if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(entity, blockPos3, this.spawnBlock.defaultBlockState()).isCancelled()) {
+ entity.getBrain().eraseMemory(this.memoryModule); // forgot pregnant memory
+ return;
+ }
+ // Paper end
world.setBlock(blockPos3, this.spawnBlock.defaultBlockState(), 3);
world.playSound((Player)null, entity, SoundEvents.FROG_LAY_SPAWN, SoundSource.BLOCKS, 1.0F, 1.0F);
entity.getBrain().eraseMemory(this.memoryModule);
diff --git a/src/main/java/net/minecraft/world/item/AxeItem.java b/src/main/java/net/minecraft/world/item/AxeItem.java
index 03a6a99dcc0c8fcc32776dd49cf6092b899bf6ed..9c49d8f696864d2aad23208422c4ab5b598a0cd9 100644
--- a/src/main/java/net/minecraft/world/item/AxeItem.java
+++ b/src/main/java/net/minecraft/world/item/AxeItem.java
@@ -54,6 +54,11 @@ public class AxeItem extends DiggerItem {
}
if (optional4.isPresent()) {
+ // Paper start - EntityChangeBlockEvent
+ if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(player, blockPos, optional4.get()).isCancelled()) {
+ return InteractionResult.PASS;
+ }
+ // Paper end
if (player instanceof ServerPlayer) {
CriteriaTriggers.ITEM_USED_ON_BLOCK.trigger((ServerPlayer)player, blockPos, itemStack);
}
diff --git a/src/main/java/net/minecraft/world/item/HoneycombItem.java b/src/main/java/net/minecraft/world/item/HoneycombItem.java
index 68a8d3b16d49c10fc9834f32009095d35c9c55a8..1f8b7b50c6aa24778d87821ae2ff4d019d176082 100644
--- a/src/main/java/net/minecraft/world/item/HoneycombItem.java
+++ b/src/main/java/net/minecraft/world/item/HoneycombItem.java
@@ -37,6 +37,11 @@ public class HoneycombItem extends Item {
return getWaxed(blockState).map((state) -> {
Player player = context.getPlayer();
ItemStack itemStack = context.getItemInHand();
+ // Paper start - EntityChangeBlockEvent
+ if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(player, blockPos, state).isCancelled()) {
+ return InteractionResult.PASS;
+ }
+ // Paper end
if (player instanceof ServerPlayer) {
CriteriaTriggers.ITEM_USED_ON_BLOCK.trigger((ServerPlayer)player, blockPos, itemStack);
}
diff --git a/src/main/java/net/minecraft/world/item/ShovelItem.java b/src/main/java/net/minecraft/world/item/ShovelItem.java
index 32995cb5efdad0bc34ecacacb78cccd21220ba8d..c7195f2e12bbd6545f7bffcc2b4ba5cc3d48df20 100644
--- a/src/main/java/net/minecraft/world/item/ShovelItem.java
+++ b/src/main/java/net/minecraft/world/item/ShovelItem.java
@@ -36,20 +36,29 @@ public class ShovelItem extends DiggerItem {
Player player = context.getPlayer();
BlockState blockState2 = FLATTENABLES.get(blockState.getBlock());
BlockState blockState3 = null;
+ Runnable afterAction = null; // Paper
if (blockState2 != null && level.getBlockState(blockPos.above()).isAir()) {
- level.playSound(player, blockPos, SoundEvents.SHOVEL_FLATTEN, SoundSource.BLOCKS, 1.0F, 1.0F);
+ afterAction = () -> level.playSound(player, blockPos, SoundEvents.SHOVEL_FLATTEN, SoundSource.BLOCKS, 1.0F, 1.0F); // Paper
blockState3 = blockState2;
} else if (blockState.getBlock() instanceof CampfireBlock && blockState.getValue(CampfireBlock.LIT)) {
+ afterAction = () -> { // Paper
if (!level.isClientSide()) {
level.levelEvent((Player)null, 1009, blockPos, 0);
}
CampfireBlock.dowse(context.getPlayer(), level, blockPos, blockState);
+ }; // Paper
blockState3 = blockState.setValue(CampfireBlock.LIT, Boolean.valueOf(false));
}
if (blockState3 != null) {
if (!level.isClientSide) {
+ // Paper start
+ if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(context.getPlayer(), blockPos, blockState3).isCancelled()) {
+ return InteractionResult.PASS;
+ }
+ afterAction.run();
+ // Paper end
level.setBlock(blockPos, blockState3, 11);
level.gameEvent(GameEvent.BLOCK_CHANGE, blockPos, GameEvent.Context.of(player, blockState3));
if (player != null) {
diff --git a/src/main/java/net/minecraft/world/level/block/ComposterBlock.java b/src/main/java/net/minecraft/world/level/block/ComposterBlock.java
index 2b1983d61fd3ed856770146de5cdfd33b4f63a46..492e3ffd6a4588a521486db631f3e8b2a25b74ec 100644
--- a/src/main/java/net/minecraft/world/level/block/ComposterBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/ComposterBlock.java
@@ -221,7 +221,14 @@ public class ComposterBlock extends Block implements WorldlyContainerHolder {
if (i < 8 && ComposterBlock.COMPOSTABLES.containsKey(itemstack.getItem())) {
if (i < 7 && !world.isClientSide) {
- BlockState iblockdata1 = ComposterBlock.addItem(state, world, pos, itemstack);
+ // Paper start - EntityChangeBlockEvent
+ double rand = world.getRandom().nextDouble();
+ BlockState dummyBlockState = ComposterBlock.addItem(state, org.bukkit.craftbukkit.util.DummyGeneratorAccess.INSTANCE, pos, itemstack, rand);
+ if (state != dummyBlockState && org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(player, pos, dummyBlockState).isCancelled()) { // if block state will change and event cancelled
+ return InteractionResult.sidedSuccess(world.isClientSide);
+ }
+ BlockState iblockdata1 = ComposterBlock.addItem(state, world, pos, itemstack, rand);
+ // Paper end
world.levelEvent(1500, pos, state != iblockdata1 ? 1 : 0);
player.awardStat(Stats.ITEM_USED.get(itemstack.getItem()));
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