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PaperMC/patches/server/1055-Fix-DamageSource-API.patch
Jake Potrebic d361a7f609
Fix DamageSource API (#10307) 
Uses the correct entity in the EntityDamageByEntity event
Returns the correct entity for API's DamageSource#getCausingEntity
2024-03-16 11:51:22 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 9 Mar 2024 14:13:04 -0800
Subject: [PATCH] Fix DamageSource API
Uses the correct entity in the EntityDamageByEntity event
Returns the correct entity for API's DamageSource#getCausingEntity
diff --git a/src/main/java/net/minecraft/world/damagesource/DamageSource.java b/src/main/java/net/minecraft/world/damagesource/DamageSource.java
index 1561b85a45f52a8162f43553f8485bfe084b8f1f..b26e4d58ea1898a5e4b31c3d6ab33f38835ab2c6 100644
--- a/src/main/java/net/minecraft/world/damagesource/DamageSource.java
+++ b/src/main/java/net/minecraft/world/damagesource/DamageSource.java
@@ -27,7 +27,8 @@ public class DamageSource {
private boolean withSweep = false;
private boolean melting = false;
private boolean poison = false;
- private Entity customCausingEntity = null; // This field is a helper for when causing entity damage is not set by vanilla
+ @Nullable
+ private Entity customEventDamager = null; // This field is a helper for when causing entity damage is not set by vanilla // Paper - fix DamageSource API
public DamageSource sweep() {
this.withSweep = true;
@@ -56,13 +57,18 @@ public class DamageSource {
return this.poison;
}
- public Entity getCausingEntity() {
- return (this.customCausingEntity != null) ? this.customCausingEntity : this.causingEntity;
+ // Paper start - fix DamageSource API
+ public @Nullable Entity getCustomEventDamager() {
+ return (this.customEventDamager != null) ? this.customEventDamager : this.directEntity;
}
- public DamageSource customCausingEntity(Entity entity) {
+ public DamageSource customEventDamager(Entity entity) {
+ if (this.directEntity != null) {
+ throw new IllegalStateException("Cannot set a custom event damager entity when a direct entity is already set (report as a bug to Paper)");
+ }
DamageSource damageSource = this.cloneInstance();
- damageSource.customCausingEntity = entity;
+ damageSource.customEventDamager = entity;
+ // Paper end - fix DamageSource API
return damageSource;
}
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index be2220457e941803b14d78c550d0db777c79a886..f5a86c0fb1a7a313afc4c56ffc445a7fe7821428 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -3462,7 +3462,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
return;
}
- if (!this.hurt(this.damageSources().lightningBolt().customCausingEntity(lightning), 5.0F)) {
+ if (!this.hurt(this.damageSources().lightningBolt().customEventDamager(lightning), 5.0F)) { // Paper - fix DamageSource API
return;
}
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/world/entity/animal/Turtle.java b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
index dbdb6c432448b151fa4421f14235f8bad23dc720..2eb099957a3d0bae3339ff4edbab103fb348abed 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Turtle.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
@@ -336,7 +336,7 @@ public class Turtle extends Animal {
@Override
public void thunderHit(ServerLevel world, LightningBolt lightning) {
- this.hurt(this.damageSources().lightningBolt().customCausingEntity(lightning), Float.MAX_VALUE); // CraftBukkit
+ this.hurt(this.damageSources().lightningBolt().customEventDamager(lightning), Float.MAX_VALUE); // CraftBukkit // Paper - fix DamageSource API
}
@Override
diff --git a/src/main/java/net/minecraft/world/entity/decoration/HangingEntity.java b/src/main/java/net/minecraft/world/entity/decoration/HangingEntity.java
index 4dea85a8ab8ae16d02e35d226fd155891ce2319a..eaad15a4d201356c34c1a09c7fbe5c35f76a2176 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/HangingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/HangingEntity.java
@@ -204,7 +204,7 @@ public abstract class HangingEntity extends Entity {
} else {
if (!this.isRemoved() && !this.level().isClientSide) {
// CraftBukkit start - fire break events
- Entity damager = (source.isIndirect()) ? source.getEntity() : source.getDirectEntity();
+ Entity damager = (source.isIndirect() && source.getEntity() != null) ? source.getEntity() : source.getDirectEntity(); // Paper - fix DamageSource API
HangingBreakEvent event;
if (damager != null) {
event = new HangingBreakByEntityEvent((Hanging) this.getBukkitEntity(), damager.getBukkitEntity(), source.is(DamageTypeTags.IS_EXPLOSION) ? HangingBreakEvent.RemoveCause.EXPLOSION : HangingBreakEvent.RemoveCause.ENTITY);
diff --git a/src/main/java/net/minecraft/world/entity/projectile/EvokerFangs.java b/src/main/java/net/minecraft/world/entity/projectile/EvokerFangs.java
index a729460e35bbef134bdf0d72d8894c3df007f7b8..e6f549f1fcd261f96f0e4fc4cbe26a04c389d191 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/EvokerFangs.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/EvokerFangs.java
@@ -132,7 +132,7 @@ public class EvokerFangs extends Entity implements TraceableEntity {
if (target.isAlive() && !target.isInvulnerable() && target != entityliving1) {
if (entityliving1 == null) {
- target.hurt(this.damageSources().magic().customCausingEntity(this), 6.0F); // CraftBukkit
+ target.hurt(this.damageSources().magic().customEventDamager(this), 6.0F); // CraftBukkit // Paper - fix DamageSource API
} else {
if (entityliving1.isAlliedTo((Entity) target)) {
return;
diff --git a/src/main/java/net/minecraft/world/entity/projectile/ThrownEnderpearl.java b/src/main/java/net/minecraft/world/entity/projectile/ThrownEnderpearl.java
index 28690877c443ceb2bdf20e6d251c9d32f667814c..1fb1e729d6879568d8b4943071fa940325b2e5b0 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/ThrownEnderpearl.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/ThrownEnderpearl.java
@@ -86,7 +86,7 @@ public class ThrownEnderpearl extends ThrowableItemProjectile {
entityplayer.connection.teleport(teleEvent.getTo());
entity.resetFallDistance();
- entity.hurt(this.damageSources().fall().customCausingEntity(this), 5.0F); // CraftBukkit
+ entity.hurt(this.damageSources().fall().customEventDamager(this), 5.0F); // CraftBukkit // Paper - fix DamageSource API
}
// CraftBukkit end
this.level().playSound((Player) null, this.getX(), this.getY(), this.getZ(), SoundEvents.PLAYER_TELEPORT, SoundSource.PLAYERS);
diff --git a/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java b/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java
index 5c7a6fe97b1f0b55b4a5dddbb684e4424688f866..6f49b9b8707d74330adb973e0db3cd5bccf138b6 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java
@@ -72,7 +72,7 @@ public class WitherSkull extends AbstractHurtingProjectile {
}
}
} else {
- flag = entity.hurt(this.damageSources().magic().customCausingEntity(this), 5.0F); // Paper - Fire EntityDamageByEntityEvent for unowned wither skulls
+ flag = entity.hurt(this.damageSources().magic().customEventDamager(this), 5.0F); // Paper - Fire EntityDamageByEntityEvent for unowned wither skulls // Paper - fix DamageSource API
}
if (flag && entity instanceof LivingEntity) {
diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java
index b678da2cbb93cea7971bc3c4d324cfca18b0bc97..90a82bd7977ebe520bdcc2ab99e11452d5cf4a21 100644
--- a/src/main/java/net/minecraft/world/level/Explosion.java
+++ b/src/main/java/net/minecraft/world/level/Explosion.java
@@ -103,7 +103,7 @@ public class Explosion {
this.z = z;
this.fire = createFire;
this.blockInteraction = destructionType;
- this.damageSource = damageSource == null ? world.damageSources().explosion(this).customCausingEntity(entity) : damageSource.customCausingEntity(entity); // CraftBukkit - handle source entity
+ this.damageSource = damageSource == null ? world.damageSources().explosion(this) : damageSource; // CraftBukkit - handle source entity // Paper - revert to fix DamageSource API
this.damageCalculator = behavior == null ? this.makeDamageCalculator(entity) : behavior;
this.smallExplosionParticles = particle;
this.largeExplosionParticles = emitterParticle;
diff --git a/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSource.java b/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSource.java
index 6ae1ad21807c039726021f8f26f92042acce2fda..b7e2327c50195e8d3ca3ca3b47c7c0f9ea8e289c 100644
--- a/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSource.java
+++ b/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSource.java
@@ -41,7 +41,7 @@ public class CraftDamageSource implements DamageSource {
@Override
public org.bukkit.entity.Entity getCausingEntity() {
- net.minecraft.world.entity.Entity entity = this.getHandle().getCausingEntity();
+ net.minecraft.world.entity.Entity entity = this.getHandle().getEntity(); // Paper - fix DamageSource API
return (entity != null) ? entity.getBukkitEntity() : null;
}
@@ -65,7 +65,7 @@ public class CraftDamageSource implements DamageSource {
@Override
public boolean isIndirect() {
- return this.getHandle().getCausingEntity() != this.getHandle().getDirectEntity();
+ return this.getHandle().isIndirect(); // Paper - fix DamageSource API
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSourceBuilder.java b/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSourceBuilder.java
index 4c6e15535fa40aad8cf1920f392589404f9ba79c..35eb95ef6fb6a0f7ea63351e90741c489fdd15f9 100644
--- a/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSourceBuilder.java
+++ b/src/main/java/org/bukkit/craftbukkit/damage/CraftDamageSourceBuilder.java
@@ -41,6 +41,11 @@ public class CraftDamageSourceBuilder implements DamageSource.Builder {
@Override
public DamageSource build() {
+ // Paper start - fix DamageCause API
+ if (this.causingEntity != null && this.directEntity == null) {
+ throw new IllegalArgumentException("Direct entity must be set if causing entity is set");
+ }
+ // Paper end - fix DamageCause API
return CraftDamageSource.buildFromBukkit(this.damageType, this.causingEntity, this.directEntity, this.damageLocation);
}
}
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 4c2e8129481384a143384d327e14320023735b1a..cb3e9672f375a1a660757a05362729ddb5ca7504 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1082,7 +1082,7 @@ public class CraftEventFactory {
private static EntityDamageEvent handleEntityDamageEvent(Entity entity, DamageSource source, Map<DamageModifier, Double> modifiers, Map<DamageModifier, Function<? super Double, Double>> modifierFunctions, boolean cancelled) {
CraftDamageSource bukkitDamageSource = new CraftDamageSource(source);
- Entity damager = source.getCausingEntity();
+ final Entity damager = source.getCustomEventDamager(); // Paper - fix DamageSource API
if (source.is(DamageTypeTags.IS_EXPLOSION)) {
if (damager == null) {
return CraftEventFactory.callEntityDamageEvent(source.getDirectBlock(), entity, DamageCause.BLOCK_EXPLOSION, bukkitDamageSource, modifiers, modifierFunctions, cancelled, source.explodedBlockState); // Paper - Include BlockState for damage
@@ -1092,9 +1092,7 @@ public class CraftEventFactory {
} else if (damager != null || source.getDirectEntity() != null) {
DamageCause cause = (source.isSweep()) ? DamageCause.ENTITY_SWEEP_ATTACK : DamageCause.ENTITY_ATTACK;
- if (bukkitDamageSource.isIndirect() && source.getDirectEntity() != null) {
- damager = source.getDirectEntity();
- }
+ // Paper - fix DamageSource API
if (damager instanceof net.minecraft.world.entity.projectile.Projectile) {
if (damager.getBukkitEntity() instanceof ThrownPotion) {
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