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Paper/patches/server/0924-Add-drops-to-shear-events.patch
Nassim Jahnke dc684c60d1
Remove bad server.scheduleOnMain disconnect calls from old patches 
The new behavior of disconnect to block the current thread until the disconnect succeeded is better than throwing it off to happen at some point
2024-06-16 12:56:00 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Tue, 18 May 2021 12:32:02 -0700
Subject: [PATCH] Add drops to shear events
diff --git a/src/main/java/net/minecraft/core/dispenser/ShearsDispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/ShearsDispenseItemBehavior.java
index f32f8d5cb22feb885a53d3b56c04ad4219d2bafa..44b79a7c2f8b95a484d1999fa2167ce588f7985b 100644
--- a/src/main/java/net/minecraft/core/dispenser/ShearsDispenseItemBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/ShearsDispenseItemBehavior.java
@@ -103,11 +103,14 @@ public class ShearsDispenseItemBehavior extends OptionalDispenseItemBehavior {
if (entityliving instanceof Shearable ishearable) {
if (ishearable.readyForShearing()) {
// CraftBukkit start
- if (CraftEventFactory.callBlockShearEntityEvent(entityliving, bukkitBlock, craftItem).isCancelled()) {
+ // Paper start - Add drops to shear events
+ org.bukkit.event.block.BlockShearEntityEvent event = CraftEventFactory.callBlockShearEntityEvent(entityliving, bukkitBlock, craftItem, ishearable.generateDefaultDrops());
+ if (event.isCancelled()) {
+ // Paper end - Add drops to shear events
continue;
}
// CraftBukkit end
- ishearable.shear(SoundSource.BLOCKS);
+ ishearable.shear(SoundSource.BLOCKS, CraftItemStack.asNMSCopy(event.getDrops())); // Paper - Add drops to shear events
worldserver.gameEvent((Entity) null, (Holder) GameEvent.SHEAR, blockposition);
return true;
}
diff --git a/src/main/java/net/minecraft/world/entity/Shearable.java b/src/main/java/net/minecraft/world/entity/Shearable.java
index 5e8cc5cfac8888628c6d513148f41be09ca65a2c..2ee48ac3b665db2b02bcb1a30ec972d43a3725b0 100644
--- a/src/main/java/net/minecraft/world/entity/Shearable.java
+++ b/src/main/java/net/minecraft/world/entity/Shearable.java
@@ -3,7 +3,13 @@ package net.minecraft.world.entity;
import net.minecraft.sounds.SoundSource;
public interface Shearable {
+ default void shear(SoundSource soundCategory, java.util.List<net.minecraft.world.item.ItemStack> drops) { this.shear(soundCategory); } // Paper - Add drops to shear events
void shear(SoundSource shearedSoundCategory);
boolean readyForShearing();
+ // Paper start - custom shear drops; ensure all implementing entities override this
+ default java.util.List<net.minecraft.world.item.ItemStack> generateDefaultDrops() {
+ return java.util.Collections.emptyList();
+ }
+ // Paper end - custom shear drops
}
diff --git a/src/main/java/net/minecraft/world/entity/animal/MushroomCow.java b/src/main/java/net/minecraft/world/entity/animal/MushroomCow.java
index aa125e3043b120935aaa015803f065f99eb8d050..0c21959f57ae88fcd0a4d6dc911c1ce347c96528 100644
--- a/src/main/java/net/minecraft/world/entity/animal/MushroomCow.java
+++ b/src/main/java/net/minecraft/world/entity/animal/MushroomCow.java
@@ -123,11 +123,18 @@ public class MushroomCow extends Cow implements Shearable, VariantHolder<Mushroo
return InteractionResult.sidedSuccess(this.level().isClientSide);
} else if (itemstack.is(Items.SHEARS) && this.readyForShearing()) {
// CraftBukkit start
- if (!CraftEventFactory.handlePlayerShearEntityEvent(player, this, itemstack, hand)) {
- return InteractionResult.PASS;
+ // Paper start - custom shear drops
+ java.util.List<ItemStack> drops = this.generateDefaultDrops();
+ org.bukkit.event.player.PlayerShearEntityEvent event = CraftEventFactory.handlePlayerShearEntityEvent(player, this, itemstack, hand, drops);
+ if (event != null) {
+ if (event.isCancelled()) {
+ return InteractionResult.PASS;
+ }
+ drops = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(event.getDrops());
}
+ // Paper end - custom shear drops
// CraftBukkit end
- this.shear(SoundSource.PLAYERS);
+ this.shear(SoundSource.PLAYERS, drops); // Paper - custom shear drops
this.gameEvent(GameEvent.SHEAR, player);
if (!this.level().isClientSide) {
itemstack.hurtAndBreak(1, player, getSlotForHand(hand));
@@ -164,6 +171,22 @@ public class MushroomCow extends Cow implements Shearable, VariantHolder<Mushroo
@Override
public void shear(SoundSource shearedSoundCategory) {
+ // Paper start - custom shear drops
+ this.shear(shearedSoundCategory, this.generateDefaultDrops());
+ }
+
+ @Override
+ public java.util.List<ItemStack> generateDefaultDrops() {
+ java.util.List<ItemStack> dropEntities = new java.util.ArrayList<>(5);
+ for (int i = 0; i < 5; ++i) {
+ dropEntities.add(new ItemStack(this.getVariant().getBlockState().getBlock()));
+ }
+ return dropEntities;
+ }
+
+ @Override
+ public void shear(SoundSource shearedSoundCategory, java.util.List<ItemStack> drops) { // If drops is null, need to generate drops
+ // Paper end - custom shear drops
this.level().playSound((Player) null, (Entity) this, SoundEvents.MOOSHROOM_SHEAR, shearedSoundCategory, 1.0F, 1.0F);
if (!this.level().isClientSide()) {
Cow entitycow = (Cow) EntityType.COW.create(this.level());
@@ -193,17 +216,12 @@ public class MushroomCow extends Cow implements Shearable, VariantHolder<Mushroo
this.discard(EntityRemoveEvent.Cause.TRANSFORMATION); // CraftBukkit - from above and add Bukkit remove cause
// CraftBukkit end
- for (int i = 0; i < 5; ++i) {
- // CraftBukkit start
- ItemEntity entityitem = new ItemEntity(this.level(), this.getX(), this.getY(1.0D), this.getZ(), new ItemStack(this.getVariant().blockState.getBlock()));
- EntityDropItemEvent event = new EntityDropItemEvent(this.getBukkitEntity(), (org.bukkit.entity.Item) entityitem.getBukkitEntity());
- Bukkit.getPluginManager().callEvent(event);
- if (event.isCancelled()) {
- continue;
- }
- this.level().addFreshEntity(entityitem);
- // CraftBukkit end
+ // Paper start - custom shear drops; moved drop generation to separate method
+ for (final ItemStack drop : drops) {
+ ItemEntity entityitem = new ItemEntity(this.level(), this.getX(), this.getY(1.0D), this.getZ(), drop);
+ this.spawnAtLocation(entityitem);
}
+ // Paper end - custom shear drops
}
}
diff --git a/src/main/java/net/minecraft/world/entity/animal/Sheep.java b/src/main/java/net/minecraft/world/entity/animal/Sheep.java
index 6b26af41423110bd982eb8c0eea0cba5e9fdc633..38ac2759894660be1ee7ba59b0bd1270158e9232 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Sheep.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Sheep.java
@@ -256,11 +256,18 @@ public class Sheep extends Animal implements Shearable {
if (itemstack.is(Items.SHEARS)) {
if (!this.level().isClientSide && this.readyForShearing()) {
// CraftBukkit start
- if (!CraftEventFactory.handlePlayerShearEntityEvent(player, this, itemstack, hand)) {
- return InteractionResult.PASS;
+ // Paper start - custom shear drops
+ java.util.List<ItemStack> drops = this.generateDefaultDrops();
+ org.bukkit.event.player.PlayerShearEntityEvent event = CraftEventFactory.handlePlayerShearEntityEvent(player, this, itemstack, hand, drops);
+ if (event != null) {
+ if (event.isCancelled()) {
+ return InteractionResult.PASS;
+ }
+ drops = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(event.getDrops());
}
+ // Paper end - custom shear drops
// CraftBukkit end
- this.shear(SoundSource.PLAYERS);
+ this.shear(SoundSource.PLAYERS, drops); // Paper
this.gameEvent(GameEvent.SHEAR, player);
itemstack.hurtAndBreak(1, player, getSlotForHand(hand));
return InteractionResult.SUCCESS;
@@ -274,13 +281,30 @@ public class Sheep extends Animal implements Shearable {
@Override
public void shear(SoundSource shearedSoundCategory) {
+ // Paper start - custom shear drops
+ this.shear(shearedSoundCategory, this.generateDefaultDrops());
+ }
+
+ @Override
+ public java.util.List<ItemStack> generateDefaultDrops() {
+ int count = 1 + this.random.nextInt(3);
+ java.util.List<ItemStack> dropEntities = new java.util.ArrayList<>(count);
+ for (int j = 0; j < count; ++j) {
+ dropEntities.add(new ItemStack(Sheep.ITEM_BY_DYE.get(this.getColor())));
+ }
+ return dropEntities;
+ }
+
+ @Override
+ public void shear(SoundSource shearedSoundCategory, java.util.List<ItemStack> drops) {
+ // Paper end - custom shear drops
this.level().playSound((Player) null, (Entity) this, SoundEvents.SHEEP_SHEAR, shearedSoundCategory, 1.0F, 1.0F);
this.setSheared(true);
int i = 1 + this.random.nextInt(3);
- for (int j = 0; j < i; ++j) {
+ for (final ItemStack drop : drops) { // Paper - custom shear drops (moved drop generation to separate method)
this.forceDrops = true; // CraftBukkit
- ItemEntity entityitem = this.spawnAtLocation((ItemLike) Sheep.ITEM_BY_DYE.get(this.getColor()), 1);
+ ItemEntity entityitem = this.spawnAtLocation(drop, 1); // Paper - custom shear drops
this.forceDrops = false; // CraftBukkit
if (entityitem != null) {
diff --git a/src/main/java/net/minecraft/world/entity/animal/SnowGolem.java b/src/main/java/net/minecraft/world/entity/animal/SnowGolem.java
index 2de1a2f666da9db1832907e1651dbff948e37252..5c2ed3c39c8eb850f3be1e2ea5b5a7ea266e16d1 100644
--- a/src/main/java/net/minecraft/world/entity/animal/SnowGolem.java
+++ b/src/main/java/net/minecraft/world/entity/animal/SnowGolem.java
@@ -146,11 +146,18 @@ public class SnowGolem extends AbstractGolem implements Shearable, RangedAttackM
if (itemstack.is(Items.SHEARS) && this.readyForShearing()) {
// CraftBukkit start
- if (!CraftEventFactory.handlePlayerShearEntityEvent(player, this, itemstack, hand)) {
- return InteractionResult.PASS;
+ // Paper start - custom shear drops
+ java.util.List<ItemStack> drops = this.generateDefaultDrops();
+ org.bukkit.event.player.PlayerShearEntityEvent event = CraftEventFactory.handlePlayerShearEntityEvent(player, this, itemstack, hand, drops);
+ if (event != null) {
+ if (event.isCancelled()) {
+ return InteractionResult.PASS;
+ }
+ drops = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(event.getDrops());
}
+ // Paper end - custom shear drops
// CraftBukkit end
- this.shear(SoundSource.PLAYERS);
+ this.shear(SoundSource.PLAYERS, drops); // Paper
this.gameEvent(GameEvent.SHEAR, player);
if (!this.level().isClientSide) {
itemstack.hurtAndBreak(1, player, getSlotForHand(hand));
@@ -164,12 +171,28 @@ public class SnowGolem extends AbstractGolem implements Shearable, RangedAttackM
@Override
public void shear(SoundSource shearedSoundCategory) {
+ // Paper start - custom shear drops
+ this.shear(shearedSoundCategory, this.generateDefaultDrops());
+ }
+
+ @Override
+ public java.util.List<ItemStack> generateDefaultDrops() {
+ return java.util.Collections.singletonList(new ItemStack(Items.CARVED_PUMPKIN));
+ }
+
+ @Override
+ public void shear(SoundSource shearedSoundCategory, java.util.List<ItemStack> drops) {
+ // Paper end - custom shear drops
this.level().playSound((Player) null, (Entity) this, SoundEvents.SNOW_GOLEM_SHEAR, shearedSoundCategory, 1.0F, 1.0F);
if (!this.level().isClientSide()) {
this.setPumpkin(false);
- this.forceDrops = true; // CraftBukkit
- this.spawnAtLocation(new ItemStack(Items.CARVED_PUMPKIN), this.getEyeHeight());
- this.forceDrops = false; // CraftBukkit
+ // Paper start - custom shear drops (moved drop generation to separate method)
+ for (final ItemStack drop : drops) {
+ this.forceDrops = true;
+ this.spawnAtLocation(drop, this.getEyeHeight());
+ this.forceDrops = false;
+ }
+ // Paper end - custom shear drops
}
}
diff --git a/src/main/java/net/minecraft/world/entity/monster/Bogged.java b/src/main/java/net/minecraft/world/entity/monster/Bogged.java
index 8420d75865b86e1d8afea2527b5521cac184e8b1..6e290d67b00c88ecd2cf2ce5f612f52ebda9e280 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Bogged.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Bogged.java
@@ -135,6 +135,15 @@ public class Bogged extends AbstractSkeleton implements Shearable {
}
private void spawnShearedMushrooms() {
+ // Paper start - shear drops API
+ this.generateShearedMushrooms(stack -> {
+ this.forceDrops = true;
+ this.spawnAtLocation(stack, this.getBbHeight());
+ this.forceDrops = false;
+ });
+ }
+ private void generateShearedMushrooms(java.util.function.Consumer<ItemStack> stackConsumer) {
+ // Paper end - shear drops API
if (this.level() instanceof ServerLevel serverLevel) {
LootTable lootTable = serverLevel.getServer().reloadableRegistries().getLootTable(BuiltInLootTables.BOGGED_SHEAR);
LootParams lootParams = new LootParams.Builder(serverLevel)
@@ -143,11 +152,20 @@ public class Bogged extends AbstractSkeleton implements Shearable {
.create(LootContextParamSets.SHEARING);
for (ItemStack itemStack : lootTable.getRandomItems(lootParams)) {
- this.spawnAtLocation(itemStack, this.getBbHeight());
+ stackConsumer.accept(itemStack); // Paper
}
}
}
+ // Paper start - shear drops API
+ @Override
+ public java.util.List<ItemStack> generateDefaultDrops() {
+ final java.util.List<ItemStack> drops = new java.util.ArrayList<>();
+ this.generateShearedMushrooms(drops::add);
+ return drops;
+ }
+ // Paper end - shear drops API
+
@Override
public boolean readyForShearing() {
return !this.isSheared() && this.isAlive();
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index bec1f62559b42acee6c955baf7851aecb9179e16..1af662ca881d656b17697fce837f659349241234 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1669,20 +1669,20 @@ public class CraftEventFactory {
player.level().getCraftServer().getPluginManager().callEvent(event);
}
- public static BlockShearEntityEvent callBlockShearEntityEvent(Entity animal, org.bukkit.block.Block dispenser, CraftItemStack is) {
- BlockShearEntityEvent bse = new BlockShearEntityEvent(dispenser, animal.getBukkitEntity(), is);
+ public static BlockShearEntityEvent callBlockShearEntityEvent(Entity animal, org.bukkit.block.Block dispenser, CraftItemStack is, List<ItemStack> drops) { // Paper - custom shear drops
+ BlockShearEntityEvent bse = new BlockShearEntityEvent(dispenser, animal.getBukkitEntity(), is, Lists.transform(drops, CraftItemStack::asCraftMirror)); // Paper - custom shear drops
Bukkit.getPluginManager().callEvent(bse);
return bse;
}
- public static boolean handlePlayerShearEntityEvent(net.minecraft.world.entity.player.Player player, Entity sheared, ItemStack shears, InteractionHand hand) {
+ public static PlayerShearEntityEvent handlePlayerShearEntityEvent(net.minecraft.world.entity.player.Player player, Entity sheared, ItemStack shears, InteractionHand hand, List<ItemStack> drops) { // Paper - custom shear drops
if (!(player instanceof ServerPlayer)) {
- return true;
+ return null; // Paper - custom shear drops
}
- PlayerShearEntityEvent event = new PlayerShearEntityEvent((Player) player.getBukkitEntity(), sheared.getBukkitEntity(), CraftItemStack.asCraftMirror(shears), (hand == InteractionHand.OFF_HAND ? EquipmentSlot.OFF_HAND : EquipmentSlot.HAND));
+ PlayerShearEntityEvent event = new PlayerShearEntityEvent((Player) player.getBukkitEntity(), sheared.getBukkitEntity(), CraftItemStack.asCraftMirror(shears), (hand == InteractionHand.OFF_HAND ? EquipmentSlot.OFF_HAND : EquipmentSlot.HAND), Lists.transform(drops, CraftItemStack::asCraftMirror)); // Paper - custom shear drops
Bukkit.getPluginManager().callEvent(event);
- return !event.isCancelled();
+ return event; // Paper - custom shear drops
}
public static Cancellable handleStatisticsIncrease(net.minecraft.world.entity.player.Player entityHuman, net.minecraft.stats.Stat<?> statistic, int current, int newValue) {
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
index 41c0cfc88f2ec48c1bb8ac10a78f89bf1f2f2319..62b5ba0cafd3a09229648b1205679148b476edcc 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
@@ -68,6 +68,16 @@ public final class CraftItemStack extends ItemStack {
return stack;
}
+ // Paper start
+ public static java.util.List<net.minecraft.world.item.ItemStack> asNMSCopy(java.util.List<? extends ItemStack> originals) {
+ final java.util.List<net.minecraft.world.item.ItemStack> items = new java.util.ArrayList<>(originals.size());
+ for (final ItemStack original : originals) {
+ items.add(asNMSCopy(original));
+ }
+ return items;
+ }
+ // Paper end
+
public static net.minecraft.world.item.ItemStack copyNMSStack(net.minecraft.world.item.ItemStack original, int amount) {
net.minecraft.world.item.ItemStack stack = original.copy();
stack.setCount(amount);
diff --git a/src/test/java/io/papermc/paper/entity/ShearableDropsTest.java b/src/test/java/io/papermc/paper/entity/ShearableDropsTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..e612515f7709dbe5d1fa5751337cdc34fce10a98
--- /dev/null
+++ b/src/test/java/io/papermc/paper/entity/ShearableDropsTest.java
@@ -0,0 +1,34 @@
+package io.papermc.paper.entity;
+
+import io.github.classgraph.ClassGraph;
+import io.github.classgraph.ClassInfo;
+import io.github.classgraph.MethodInfoList;
+import io.github.classgraph.ScanResult;
+import java.util.ArrayList;
+import net.minecraft.world.entity.Shearable;
+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;
+
+class ShearableDropsTest extends AbstractTestingBase {
+
+ static Iterable<ClassInfo> parameters() {
+ try (ScanResult scanResult = new ClassGraph()
+ .enableClassInfo()
+ .enableMethodInfo()
+ .whitelistPackages("net.minecraft")
+ .scan()
+ ) {
+ return new ArrayList<>(scanResult.getClassesImplementing(Shearable.class.getName()));
+ }
+ }
+
+ @ParameterizedTest
+ @MethodSource("parameters")
+ void checkShearableDropOverrides(final ClassInfo classInfo) {
+ final MethodInfoList generateDefaultDrops = classInfo.getDeclaredMethodInfo("generateDefaultDrops");
+ assertEquals(1, generateDefaultDrops.size(), classInfo.getName() + " doesn't implement Shearable#generateDefaultDrops");
+ }
+}
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