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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
48 lines
3.5 KiB
Diff
48 lines
3.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Tamion <70228790+notTamion@users.noreply.github.com>
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Date: Thu, 23 May 2024 11:02:20 +0200
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Subject: [PATCH] Fix cancelling BlockPlaceEvent calling onRemove
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diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
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index 58786dd7b51d17c1b602756c4c44840ab75ad0a7..96b24c1415af531feef7d8ab4724f7fed3ae8388 100644
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--- a/src/main/java/net/minecraft/world/item/ItemStack.java
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+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
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@@ -494,9 +494,11 @@ public final class ItemStack implements DataComponentHolder {
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world.capturedTileEntities.clear(); // Paper - Allow chests to be placed with NBT data; clear out block entities as chests and such will pop loot
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// revert back all captured blocks
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world.preventPoiUpdated = true; // CraftBukkit - SPIGOT-5710
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+ world.isBlockPlaceCancelled = true; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
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for (BlockState blockstate : blocks) {
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blockstate.update(true, false);
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}
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+ world.isBlockPlaceCancelled = false; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
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world.preventPoiUpdated = false;
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// Brute force all possible updates
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index a2877f3eb206ab9ccb93e3606f1c9b3401def5d6..e5abde76c354c3dd9940dd4e5ae3fe8b6a2b4680 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -151,6 +151,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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public boolean preventPoiUpdated = false; // CraftBukkit - SPIGOT-5710
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public boolean captureBlockStates = false;
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public boolean captureTreeGeneration = false;
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+ public boolean isBlockPlaceCancelled = false; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
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public Map<BlockPos, org.bukkit.craftbukkit.block.CraftBlockState> capturedBlockStates = new java.util.LinkedHashMap<>(); // Paper
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public Map<BlockPos, BlockEntity> capturedTileEntities = new java.util.LinkedHashMap<>(); // Paper - Retain block place order when capturing blockstates
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public List<ItemEntity> captureDrops;
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diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
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index 86eb9029969f4de3ada7be9e135e9764172b85f5..21946a93b6a2a3c79d15af1d6e7eabc537ba0125 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
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@@ -345,7 +345,7 @@ public class LevelChunk extends ChunkAccess {
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boolean flag3 = iblockdata1.hasBlockEntity();
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- if (!this.level.isClientSide) {
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+ if (!this.level.isClientSide && !this.level.isBlockPlaceCancelled) { // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
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iblockdata1.onRemove(this.level, blockposition, iblockdata, flag);
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} else if (!iblockdata1.is(block) && flag3) {
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this.removeBlockEntity(blockposition);
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