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Paper/patches/server/1024-Restore-vanilla-entity-drops-behavior.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Tue, 22 Mar 2022 09:34:41 -0700
Subject: [PATCH] Restore vanilla entity drops behavior
Instead of just tracking the itemstacks, this tracks with it, the
action to take with that itemstack to apply the correct logic
on dropping the item instead of generalizing it for all dropped
items like CB does.
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 86038d8e2998b1100706171c814b0ef34a20ee14..6872e223ff4b450af89a838f4caf7cf2ebcb818e 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -944,22 +944,20 @@ public class ServerPlayer extends Player {
if (this.isRemoved()) {
return;
}
- java.util.List<org.bukkit.inventory.ItemStack> loot = new java.util.ArrayList<org.bukkit.inventory.ItemStack>(this.getInventory().getContainerSize());
+ List<DefaultDrop> loot = new java.util.ArrayList<>(this.getInventory().getContainerSize()); // Paper - Restore vanilla drops behavior
boolean keepInventory = this.level().getGameRules().getBoolean(GameRules.RULE_KEEPINVENTORY) || this.isSpectator();
if (!keepInventory) {
for (ItemStack item : this.getInventory().getContents()) {
if (!item.isEmpty() && !EnchantmentHelper.hasVanishingCurse(item)) {
- loot.add(CraftItemStack.asCraftMirror(item));
+ loot.add(new DefaultDrop(item, stack -> this.drop(stack, true, false, false))); // Paper - Restore vanilla drops behavior; drop function taken from Inventory#dropAll (don't fire drop event)
}
}
}
if (this.shouldDropLoot() && this.level().getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) { // Paper - fix player loottables running when mob loot gamerule is false
// SPIGOT-5071: manually add player loot tables (SPIGOT-5195 - ignores keepInventory rule)
this.dropFromLootTable(damageSource, this.lastHurtByPlayerTime > 0);
- for (org.bukkit.inventory.ItemStack item : this.drops) {
- loot.add(item);
- }
+ loot.addAll(this.drops); // Paper
this.drops.clear(); // SPIGOT-5188: make sure to clear
} // Paper - fix player loottables running when mob loot gamerule is false
@@ -2442,8 +2440,8 @@ public class ServerPlayer extends Player {
}
@Override
- public ItemEntity drop(ItemStack stack, boolean throwRandomly, boolean retainOwnership) {
- ItemEntity entityitem = super.drop(stack, throwRandomly, retainOwnership);
+ public ItemEntity drop(ItemStack stack, boolean throwRandomly, boolean retainOwnership, boolean callDropEvent) { // Paper - Restore vanilla drops behavior; override method with most params
+ ItemEntity entityitem = super.drop(stack, throwRandomly, retainOwnership, callDropEvent); // Paper - Restore vanilla drops behavior; override method with most params
if (entityitem == null) {
return null;
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index a70633d9585f94e673c58fc69660d984ca169561..8814ffc0f3ebe352cd72f50d9f68704e4ee0e88c 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -2703,6 +2703,25 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
@Nullable
public ItemEntity spawnAtLocation(ItemStack stack, float yOffset) {
+ // Paper start - Restore vanilla drops behavior
+ return this.spawnAtLocation(stack, yOffset, null);
+ }
+ public record DefaultDrop(Item item, org.bukkit.inventory.ItemStack stack, @Nullable java.util.function.Consumer<ItemStack> dropConsumer) {
+ public DefaultDrop(final ItemStack stack, final java.util.function.Consumer<ItemStack> dropConsumer) {
+ this(stack.getItem(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(stack), dropConsumer);
+ }
+
+ public void runConsumer(final org.bukkit.World fallbackWorld, final Location fallbackLoc) {
+ if (this.dropConsumer == null || org.bukkit.craftbukkit.util.CraftMagicNumbers.getItem(this.stack.getType()) != this.item) {
+ fallbackWorld.dropItem(fallbackLoc, this.stack);
+ } else {
+ this.dropConsumer.accept(org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(this.stack));
+ }
+ }
+ }
+ @Nullable
+ public ItemEntity spawnAtLocation(ItemStack stack, float yOffset, @Nullable java.util.function.Consumer<? super ItemEntity> delayedAddConsumer) {
+ // Paper end - Restore vanilla drops behavior
if (stack.isEmpty()) {
return null;
} else if (this.level().isClientSide) {
@@ -2710,14 +2729,21 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
} else {
// CraftBukkit start - Capture drops for death event
if (this instanceof net.minecraft.world.entity.LivingEntity && !((net.minecraft.world.entity.LivingEntity) this).forceDrops) {
- ((net.minecraft.world.entity.LivingEntity) this).drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(stack)); // Paper - mirror so we can destroy it later
+ // Paper start - Restore vanilla drops behavior
+ ((net.minecraft.world.entity.LivingEntity) this).drops.add(new net.minecraft.world.entity.Entity.DefaultDrop(stack, itemStack -> {
+ ItemEntity itemEntity = new ItemEntity(this.level, this.getX(), this.getY() + (double) yOffset, this.getZ(), itemStack); // stack is copied before consumer
+ itemEntity.setDefaultPickUpDelay();
+ this.level.addFreshEntity(itemEntity);
+ if (delayedAddConsumer != null) delayedAddConsumer.accept(itemEntity);
+ }));
+ // Paper end - Restore vanilla drops behavior
return null;
}
// CraftBukkit end
ItemEntity entityitem = new ItemEntity(this.level(), this.getX(), this.getY() + (double) yOffset, this.getZ(), stack.copy()); // Paper - copy so we can destroy original
stack.setCount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe
- entityitem.setDefaultPickUpDelay();
+ entityitem.setDefaultPickUpDelay(); // Paper - diff on change (in dropConsumer)
// Paper start - Call EntityDropItemEvent
return this.spawnAtLocation(entityitem);
}
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 6860e588ad9daaf3d9afa11132967a50eeefe860..7fc84405bc96d768fd373dd6844de4204a39cd6a 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -254,7 +254,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
// CraftBukkit start
public int expToDrop;
public boolean forceDrops;
- public ArrayList<org.bukkit.inventory.ItemStack> drops = new ArrayList<org.bukkit.inventory.ItemStack>();
+ public ArrayList<DefaultDrop> drops = new ArrayList<>(); // Paper - Restore vanilla drops behavior
public final org.bukkit.craftbukkit.attribute.CraftAttributeMap craftAttributes;
public boolean collides = true;
public Set<UUID> collidableExemptions = new HashSet<>();
diff --git a/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java b/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
index 45906d273e6d6ec20cf44b4d07efdac68752ee9b..ac9eaeaf7df1e84ee588f371628c0a10784d50bc 100644
--- a/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
+++ b/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
@@ -534,10 +534,10 @@ public class WitherBoss extends Monster implements PowerableMob, RangedAttackMob
@Override
protected void dropCustomDeathLoot(DamageSource source, int lootingMultiplier, boolean allowDrops) {
super.dropCustomDeathLoot(source, lootingMultiplier, allowDrops);
- ItemEntity entityitem = this.spawnAtLocation((ItemLike) Items.NETHER_STAR);
+ ItemEntity entityitem = this.spawnAtLocation(new net.minecraft.world.item.ItemStack(Items.NETHER_STAR), 0, ItemEntity::setExtendedLifetime); // Paper - Restore vanilla drops behavior; spawnAtLocation returns null so modify the item entity with a consumer
if (entityitem != null) {
- entityitem.setExtendedLifetime();
+ entityitem.setExtendedLifetime(); // Paper - diff on change
}
}
diff --git a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
index ab708b256183fc54fe8e13f341d8a38acf611739..a9c1f99ba2461333bd154ac16e812031f234f7a6 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
@@ -610,7 +610,7 @@ public class ArmorStand extends LivingEntity {
itemstack.setHoverName(this.getCustomName());
}
- this.drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(itemstack)); // CraftBukkit - add to drops
+ this.drops.add(new DefaultDrop(itemstack, stack -> Block.popResource(this.level(), this.blockPosition(), stack))); // CraftBukkit - add to drops // Paper - Restore vanilla drops behavior
return this.brokenByAnything(damageSource); // Paper
}
@@ -624,7 +624,7 @@ public class ArmorStand extends LivingEntity {
for (i = 0; i < this.handItems.size(); ++i) {
itemstack = (ItemStack) this.handItems.get(i);
if (!itemstack.isEmpty()) {
- this.drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack)); // CraftBukkit - add to drops // Paper - mirror so we can destroy it later - though this call site was safe
+ this.drops.add(new DefaultDrop(itemstack, stack -> Block.popResource(this.level(), this.blockPosition().above(), stack))); // CraftBukkit - add to drops // Paper - Restore vanilla drops behavior; mirror so we can destroy it later - though this call site was safe & spawn drops correctly
this.handItems.set(i, ItemStack.EMPTY);
}
}
@@ -632,7 +632,7 @@ public class ArmorStand extends LivingEntity {
for (i = 0; i < this.armorItems.size(); ++i) {
itemstack = (ItemStack) this.armorItems.get(i);
if (!itemstack.isEmpty()) {
- this.drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack)); // CraftBukkit - add to drops // Paper - mirror so we can destroy it later - though this call site was safe
+ this.drops.add(new DefaultDrop(itemstack, stack -> Block.popResource(this.level(), this.blockPosition().above(), stack))); // CraftBukkit - add to drops // Paper - Restore vanilla drops behavior; mirror so we can destroy it later - though this call site was safe & spawn drops correctly
this.armorItems.set(i, ItemStack.EMPTY);
}
}
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 6e3d13d6c60491b7147f8bb3d60354b01d047cc7..24917c3996d06677e9da72ab53902c9868e00d86 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -939,17 +939,21 @@ public class CraftEventFactory {
}
public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim) {
- return CraftEventFactory.callEntityDeathEvent(victim, new ArrayList<org.bukkit.inventory.ItemStack>(0));
+ return CraftEventFactory.callEntityDeathEvent(victim, new ArrayList<>(0)); // Paper - Restore vanilla drops behavior
}
- public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim, List<org.bukkit.inventory.ItemStack> drops) {
+ public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim, List<Entity.DefaultDrop> drops) { // Paper - Restore vanilla drops behavior
// Paper start
return CraftEventFactory.callEntityDeathEvent(victim, drops, com.google.common.util.concurrent.Runnables.doNothing());
}
- public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim, List<org.bukkit.inventory.ItemStack> drops, Runnable lootCheck) {
+ private static java.util.function.Function<org.bukkit.inventory.ItemStack, Entity.DefaultDrop> FROM_FUNCTION = stack -> {
+ if (stack == null) return null;
+ return new Entity.DefaultDrop(CraftItemType.bukkitToMinecraft(stack.getType()), stack, null);
+ };
+ public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim, List<Entity.DefaultDrop> drops, Runnable lootCheck) { // Paper
// Paper end
CraftLivingEntity entity = (CraftLivingEntity) victim.getBukkitEntity();
- EntityDeathEvent event = new EntityDeathEvent(entity, drops, victim.getExpReward());
+ EntityDeathEvent event = new EntityDeathEvent(entity, new io.papermc.paper.util.TransformingRandomAccessList<>(drops, Entity.DefaultDrop::stack, FROM_FUNCTION), victim.getExpReward()); // Paper - Restore vanilla drops behavior
populateFields(victim, event); // Paper - make cancellable
CraftWorld world = (CraftWorld) entity.getWorld();
Bukkit.getServer().getPluginManager().callEvent(event);
@@ -963,19 +967,23 @@ public class CraftEventFactory {
victim.expToDrop = event.getDroppedExp();
lootCheck.run(); // Paper - advancement triggers before destroying items
- for (org.bukkit.inventory.ItemStack stack : event.getDrops()) {
+ // Paper start - Restore vanilla drops behavior
+ for (Entity.DefaultDrop drop : drops) {
+ if (drop == null) continue;;
+ final org.bukkit.inventory.ItemStack stack = drop.stack();
+ // Paper end - Restore vanilla drops behavior
if (stack == null || stack.getType() == Material.AIR || stack.getAmount() == 0) continue;
- world.dropItem(entity.getLocation(), stack); // Paper - note: dropItem already clones due to this being bukkit -> NMS
+ drop.runConsumer(world, entity.getLocation()); // Paper - Restore vanilla drops behavior
if (stack instanceof CraftItemStack) stack.setAmount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe, but don't nuke bukkit stacks of manually added items
}
return event;
}
- public static PlayerDeathEvent callPlayerDeathEvent(ServerPlayer victim, List<org.bukkit.inventory.ItemStack> drops, net.kyori.adventure.text.Component deathMessage, boolean keepInventory) { // Paper - Adventure
+ public static PlayerDeathEvent callPlayerDeathEvent(ServerPlayer victim, List<Entity.DefaultDrop> drops, net.kyori.adventure.text.Component deathMessage, boolean keepInventory) { // Paper - Adventure & Restore vanilla drops behavior
CraftPlayer entity = victim.getBukkitEntity();
- PlayerDeathEvent event = new PlayerDeathEvent(entity, drops, victim.getExpReward(), 0, deathMessage);
+ PlayerDeathEvent event = new PlayerDeathEvent(entity, new io.papermc.paper.util.TransformingRandomAccessList<>(drops, Entity.DefaultDrop::stack, FROM_FUNCTION), victim.getExpReward(), 0, deathMessage); // Paper - Restore vanilla drops behavior
event.setKeepInventory(keepInventory);
event.setKeepLevel(victim.keepLevel); // SPIGOT-2222: pre-set keepLevel
populateFields(victim, event); // Paper - make cancellable
@@ -994,10 +1002,14 @@ public class CraftEventFactory {
victim.expToDrop = event.getDroppedExp();
victim.newExp = event.getNewExp();
- for (org.bukkit.inventory.ItemStack stack : event.getDrops()) {
+ // Paper start - Restore vanilla drops behavior
+ for (Entity.DefaultDrop drop : drops) {
+ if (drop == null) continue;
+ final org.bukkit.inventory.ItemStack stack = drop.stack();
+ // Paper end - Restore vanilla drops behavior
if (stack == null || stack.getType() == Material.AIR) continue;
- world.dropItem(entity.getLocation(), stack);
+ drop.runConsumer(world, entity.getLocation()); // Paper - Restore vanilla drops behavior
}
return event;
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