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Paper/patches/server/0860-Properly-handle-BlockBreakEvent-isDropItems.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412) 
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.
2024-09-19 16:36:07 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 4 Mar 2023 10:52:52 -0800
Subject: [PATCH] Properly handle BlockBreakEvent#isDropItems
Setting whether a block break dropped items controlled
far more than just whether blocks dropped, like stat increases
food consumption, turtle egg count decreases, ice to water
conversions and beehive releases
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
index 717d015dd4637dd9d568b751be1dc1046b0a0560..c680f081ba548f84f07a968a46811090c53e57e3 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
@@ -439,8 +439,8 @@ public class ServerPlayerGameMode {
isCorrectTool = flag1; // Paper - Trigger bee_nest_destroyed trigger in the correct place
itemstack.mineBlock(this.level, iblockdata1, pos, this.player);
- if (flag && flag1 && event.isDropItems()) { // CraftBukkit - Check if block should drop items
- block.playerDestroy(this.level, this.player, pos, iblockdata1, tileentity, itemstack1);
+ if (flag && flag1/* && event.isDropItems() */) { // CraftBukkit - Check if block should drop items // Paper - fix drops not preventing stats/food exhaustion
+ block.playerDestroy(this.level, this.player, pos, iblockdata1, tileentity, itemstack1, event.isDropItems(), false); // Paper - fix drops not preventing stats/food exhaustion
}
// return true; // CraftBukkit
diff --git a/src/main/java/net/minecraft/world/level/block/BeehiveBlock.java b/src/main/java/net/minecraft/world/level/block/BeehiveBlock.java
index c75227b2ea165dcd65c203e60157ac7cdebd4bc6..4669b1877be5eecf6738eefd81a35bde531759d6 100644
--- a/src/main/java/net/minecraft/world/level/block/BeehiveBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/BeehiveBlock.java
@@ -86,8 +86,8 @@ public class BeehiveBlock extends BaseEntityBlock {
}
@Override
- public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
- super.playerDestroy(world, player, pos, state, blockEntity, tool);
+ public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool, boolean includeDrops, boolean dropExp) { // Paper - fix drops not preventing stats/food exhaustion
+ super.playerDestroy(world, player, pos, state, blockEntity, tool, includeDrops, dropExp); // Paper - fix drops not preventing stats/food exhaustion
if (!world.isClientSide && blockEntity instanceof BeehiveBlockEntity tileentitybeehive) {
if (!EnchantmentHelper.hasTag(tool, EnchantmentTags.PREVENTS_BEE_SPAWNS_WHEN_MINING)) {
tileentitybeehive.emptyAllLivingFromHive(player, state, BeehiveBlockEntity.BeeReleaseStatus.EMERGENCY);
diff --git a/src/main/java/net/minecraft/world/level/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index 232e6216dc36aa698047fc0badf78c347414b3a5..c083dc8b2a69c3747b250d13f1a28ad22b5e6119 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -402,10 +402,18 @@ public class Block extends BlockBehaviour implements ItemLike {
return this.defaultBlockState();
}
+ @io.papermc.paper.annotation.DoNotUse @Deprecated // Paper - fix drops not preventing stats/food exhaustion
public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
+ // Paper start - fix drops not preventing stats/food exhaustion
+ this.playerDestroy(world, player, pos, state, blockEntity, tool, true, true);
+ }
+ public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool, boolean includeDrops, boolean dropExp) {
+ // Paper end - fix drops not preventing stats/food exhaustion
player.awardStat(Stats.BLOCK_MINED.get(this));
player.causeFoodExhaustion(0.005F, org.bukkit.event.entity.EntityExhaustionEvent.ExhaustionReason.BLOCK_MINED); // CraftBukkit - EntityExhaustionEvent
+ if (includeDrops) { // Paper - fix drops not preventing stats/food exhaustion
Block.dropResources(state, world, pos, blockEntity, player, tool);
+ } // Paper - fix drops not preventing stats/food exhaustion
}
public void setPlacedBy(Level world, BlockPos pos, BlockState state, @Nullable LivingEntity placer, ItemStack itemStack) {}
diff --git a/src/main/java/net/minecraft/world/level/block/DoublePlantBlock.java b/src/main/java/net/minecraft/world/level/block/DoublePlantBlock.java
index 7fdf744a2be55313cc75c1322f6534f55cf463f5..f446c40c4d90307c568faa2866800f5326634df6 100644
--- a/src/main/java/net/minecraft/world/level/block/DoublePlantBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DoublePlantBlock.java
@@ -96,8 +96,8 @@ public class DoublePlantBlock extends BushBlock {
}
@Override
- public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
- super.playerDestroy(world, player, pos, Blocks.AIR.defaultBlockState(), blockEntity, tool);
+ public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool, boolean includeDrops, boolean dropExp) { // Paper - fix drops not preventing stats/food exhaustion
+ super.playerDestroy(world, player, pos, Blocks.AIR.defaultBlockState(), blockEntity, tool, includeDrops, dropExp); // Paper - fix drops not preventing stats/food exhaustion
}
protected static void preventDropFromBottomPart(Level world, BlockPos pos, BlockState state, Player player) {
diff --git a/src/main/java/net/minecraft/world/level/block/IceBlock.java b/src/main/java/net/minecraft/world/level/block/IceBlock.java
index e862814c1e54776f11050623b52476accc2f1f79..ac775afb265430ac202cfa3900a036d11a308b1e 100644
--- a/src/main/java/net/minecraft/world/level/block/IceBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/IceBlock.java
@@ -33,8 +33,8 @@ public class IceBlock extends HalfTransparentBlock {
}
@Override
- public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
- super.playerDestroy(world, player, pos, state, blockEntity, tool);
+ public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool, boolean includeDrops, boolean dropExp) { // Paper - fix drops not preventing stats/food exhaustion
+ super.playerDestroy(world, player, pos, state, blockEntity, tool, includeDrops, dropExp); // Paper - fix drops not preventing stats/food exhaustion
// Paper start - Improve Block#breakNaturally API
this.afterDestroy(world, pos, tool);
}
diff --git a/src/main/java/net/minecraft/world/level/block/TurtleEggBlock.java b/src/main/java/net/minecraft/world/level/block/TurtleEggBlock.java
index bdcb732a31fff0cfc2119132079ce197c7a77c9a..a6f408e56fa6c9de82fd93555fe21e1b11ce1022 100644
--- a/src/main/java/net/minecraft/world/level/block/TurtleEggBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/TurtleEggBlock.java
@@ -174,8 +174,8 @@ public class TurtleEggBlock extends Block {
}
@Override
- public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
- super.playerDestroy(world, player, pos, state, blockEntity, tool);
+ public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool, boolean includeDrops, boolean dropExp) { // Paper - fix drops not preventing stats/food exhaustion
+ super.playerDestroy(world, player, pos, state, blockEntity, tool, includeDrops, dropExp); // Paper - fix drops not preventing stats/food exhaustion
this.decreaseEggs(world, pos, state);
}
diff --git a/src/test/java/io/papermc/paper/world/block/BlockPlayerDestroyOverrideTest.java b/src/test/java/io/papermc/paper/world/block/BlockPlayerDestroyOverrideTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..7c435f7079b429873f33d7bade82eca0c6b45842
--- /dev/null
+++ b/src/test/java/io/papermc/paper/world/block/BlockPlayerDestroyOverrideTest.java
@@ -0,0 +1,47 @@
+package io.papermc.paper.world.block;
+
+import io.github.classgraph.ClassGraph;
+import io.github.classgraph.ClassInfo;
+import io.github.classgraph.MethodInfo;
+import io.github.classgraph.MethodInfoList;
+import io.github.classgraph.MethodParameterInfo;
+import io.github.classgraph.ScanResult;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Stream;
+import org.bukkit.support.AbstractTestingBase;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class BlockPlayerDestroyOverrideTest extends AbstractTestingBase {
+
+ public static Stream<ClassInfo> parameters() {
+ final List<ClassInfo> classInfo = new ArrayList<>();
+ try (ScanResult scanResult = new ClassGraph()
+ .enableClassInfo()
+ .enableMethodInfo()
+ .whitelistPackages("net.minecraft")
+ .scan()
+ ) {
+ for (final ClassInfo subclass : scanResult.getSubclasses("net.minecraft.world.level.block.Block")) {
+ final MethodInfoList playerDestroy = subclass.getDeclaredMethodInfo("playerDestroy");
+ if (!playerDestroy.isEmpty()) {
+ classInfo.add(subclass);
+ }
+ }
+ }
+ return classInfo.stream();
+ }
+
+ @ParameterizedTest
+ @MethodSource("parameters")
+ public void checkPlayerDestroyOverrides(ClassInfo overridesPlayerDestroy) {
+ final MethodInfoList playerDestroy = overridesPlayerDestroy.getDeclaredMethodInfo("playerDestroy");
+ assertEquals(1, playerDestroy.size(), overridesPlayerDestroy.getName() + " has multiple playerDestroy methods");
+ final MethodInfo next = playerDestroy.iterator().next();
+ final MethodParameterInfo[] parameterInfo = next.getParameterInfo();
+ assertEquals("boolean", parameterInfo[parameterInfo.length - 1].getTypeDescriptor().toStringWithSimpleNames(), overridesPlayerDestroy.getName() + " needs to change its override of playerDestroy");
+ }
+}
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