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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
192 lines
11 KiB
Diff
192 lines
11 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Thu, 20 May 2021 20:40:53 -0700
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Subject: [PATCH] Fix potions splash events
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Fix PotionSplashEvent for water splash potions
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Fixes SPIGOT-6221: https://hub.spigotmc.org/jira/projects/SPIGOT/issues/SPIGOT-6221
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Fix splash events cancellation that still show particles/sound
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diff --git a/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java b/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java
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index 6e921bf7101224d6b8261ab8d87724080c4095d7..0204257ca0245830534592922e400a362c347715 100644
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--- a/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java
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+++ b/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java
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@@ -106,56 +106,77 @@ public class ThrownPotion extends ThrowableItemProjectile implements ItemSupplie
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Potion potionregistry = PotionUtils.getPotion(itemstack);
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List<MobEffectInstance> list = PotionUtils.getMobEffects(itemstack);
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boolean flag = potionregistry == Potions.WATER && list.isEmpty();
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+ boolean showParticles = true; // Paper - Fix potions splash events
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if (flag) {
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- this.applyWater();
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+ showParticles = this.applyWater(hitResult); // Paper - Fix potions splash events
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} else if (true || !list.isEmpty()) { // CraftBukkit - Call event even if no effects to apply
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if (this.isLingering()) {
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- this.makeAreaOfEffectCloud(itemstack, potionregistry, hitResult); // CraftBukkit - Pass MovingObjectPosition
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+ showParticles = this.makeAreaOfEffectCloud(itemstack, potionregistry, hitResult); // CraftBukkit - Pass MovingObjectPosition // Paper
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} else {
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- this.applySplash(list, hitResult.getType() == HitResult.Type.ENTITY ? ((EntityHitResult) hitResult).getEntity() : null, hitResult); // CraftBukkit - Pass MovingObjectPosition
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+ showParticles = this.applySplash(list, hitResult.getType() == HitResult.Type.ENTITY ? ((EntityHitResult) hitResult).getEntity() : null, hitResult); // CraftBukkit - Pass MovingObjectPosition // Paper
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}
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}
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+ if (showParticles) { // Paper - Fix potions splash events
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int i = potionregistry.hasInstantEffects() ? 2007 : 2002;
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this.level().levelEvent(i, this.blockPosition(), PotionUtils.getColor(itemstack));
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+ } // Paper - Fix potions splash events
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this.discard(EntityRemoveEvent.Cause.HIT); // CraftBukkit - add Bukkit remove cause
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}
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}
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- private void applyWater() {
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+ private static final Predicate<net.minecraft.world.entity.LivingEntity> APPLY_WATER_GET_ENTITIES_PREDICATE = ThrownPotion.WATER_SENSITIVE_OR_ON_FIRE.or(Axolotl.class::isInstance); // Paper - Fix potions splash events
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+ private boolean applyWater(@Nullable HitResult hitResult) { // Paper - Fix potions splash events
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AABB axisalignedbb = this.getBoundingBox().inflate(4.0D, 2.0D, 4.0D);
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- List<net.minecraft.world.entity.LivingEntity> list = this.level().getEntitiesOfClass(net.minecraft.world.entity.LivingEntity.class, axisalignedbb, ThrownPotion.WATER_SENSITIVE_OR_ON_FIRE);
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+ // Paper start - Fix potions splash events
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+ List<net.minecraft.world.entity.LivingEntity> list = this.level().getEntitiesOfClass(net.minecraft.world.entity.LivingEntity.class, axisalignedbb, ThrownPotion.APPLY_WATER_GET_ENTITIES_PREDICATE);
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+ Map<LivingEntity, Double> affected = new HashMap<>();
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+ java.util.Set<LivingEntity> rehydrate = new java.util.HashSet<>();
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+ java.util.Set<LivingEntity> extinguish = new java.util.HashSet<>();
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Iterator iterator = list.iterator();
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while (iterator.hasNext()) {
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net.minecraft.world.entity.LivingEntity entityliving = (net.minecraft.world.entity.LivingEntity) iterator.next();
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+ if (entityliving instanceof Axolotl axolotl) {
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+ rehydrate.add(((org.bukkit.entity.Axolotl) axolotl.getBukkitEntity()));
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+ }
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double d0 = this.distanceToSqr((Entity) entityliving);
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if (d0 < 16.0D) {
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if (entityliving.isSensitiveToWater()) {
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- entityliving.hurt(this.damageSources().indirectMagic(this, this.getOwner()), 1.0F);
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+ affected.put(entityliving.getBukkitLivingEntity(), 1.0);
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}
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if (entityliving.isOnFire() && entityliving.isAlive()) {
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- entityliving.extinguishFire();
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+ extinguish.add(entityliving.getBukkitLivingEntity());
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}
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}
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}
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- List<Axolotl> list1 = this.level().getEntitiesOfClass(Axolotl.class, axisalignedbb);
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- Iterator iterator1 = list1.iterator();
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-
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- while (iterator1.hasNext()) {
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- Axolotl axolotl = (Axolotl) iterator1.next();
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-
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- axolotl.rehydrate();
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+ io.papermc.paper.event.entity.WaterBottleSplashEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callWaterBottleSplashEvent(
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+ this, hitResult, affected, rehydrate, extinguish
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+ );
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+ if (!event.isCancelled()) {
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+ for (LivingEntity affectedEntity : event.getToDamage()) {
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+ ((CraftLivingEntity) affectedEntity).getHandle().hurt(this.damageSources().indirectMagic(this, this.getOwner()), 1.0F);
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+ }
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+ for (LivingEntity toExtinguish : event.getToExtinguish()) {
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+ ((CraftLivingEntity) toExtinguish).getHandle().extinguishFire();
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+ }
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+ for (LivingEntity toRehydrate : event.getToRehydrate()) {
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+ if (((CraftLivingEntity) toRehydrate).getHandle() instanceof Axolotl axolotl) {
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+ axolotl.rehydrate();
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+ }
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+ }
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+ // Paper end - Fix potions splash events
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}
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+ return !event.isCancelled(); // Paper - Fix potions splash events
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}
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- private void applySplash(List<MobEffectInstance> list, @Nullable Entity entity, HitResult position) { // CraftBukkit - Pass MovingObjectPosition
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+ private boolean applySplash(List<MobEffectInstance> list, @Nullable Entity entity, HitResult position) { // CraftBukkit - Pass MovingObjectPosition // Paper - Fix potions splash events
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AABB axisalignedbb = this.getBoundingBox().inflate(4.0D, 2.0D, 4.0D);
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List<net.minecraft.world.entity.LivingEntity> list1 = this.level().getEntitiesOfClass(net.minecraft.world.entity.LivingEntity.class, axisalignedbb);
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Map<LivingEntity, Double> affected = new HashMap<LivingEntity, Double>(); // CraftBukkit
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@@ -173,6 +194,7 @@ public class ThrownPotion extends ThrowableItemProjectile implements ItemSupplie
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if (d0 < 16.0D) {
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double d1;
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+ // Paper - diff on change, used when calling the splash event for water splash potions
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if (entityliving == entity) {
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d1 = 1.0D;
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} else {
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@@ -227,10 +249,11 @@ public class ThrownPotion extends ThrowableItemProjectile implements ItemSupplie
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}
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}
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}
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+ return !event.isCancelled(); // Paper - Fix potions splash events
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}
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- private void makeAreaOfEffectCloud(ItemStack itemstack, Potion potionregistry, HitResult position) { // CraftBukkit - Pass MovingObjectPosition
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+ private boolean makeAreaOfEffectCloud(ItemStack itemstack, Potion potionregistry, HitResult position) { // CraftBukkit - Pass MovingObjectPosition // Paper - return boolean
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AreaEffectCloud entityareaeffectcloud = new AreaEffectCloud(this.level(), this.getX(), this.getY(), this.getZ());
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Entity entity = this.getOwner();
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@@ -245,10 +268,12 @@ public class ThrownPotion extends ThrowableItemProjectile implements ItemSupplie
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entityareaeffectcloud.setPotion(potionregistry);
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Iterator iterator = PotionUtils.getCustomEffects(itemstack).iterator();
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+ boolean noEffects = potionregistry.getEffects().isEmpty(); // Paper - Fix potions splash events
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while (iterator.hasNext()) {
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MobEffectInstance mobeffect = (MobEffectInstance) iterator.next();
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entityareaeffectcloud.addEffect(new MobEffectInstance(mobeffect));
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+ noEffects = false; // Paper - Fix potions splash events
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}
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CompoundTag nbttagcompound = itemstack.getTag();
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@@ -259,12 +284,13 @@ public class ThrownPotion extends ThrowableItemProjectile implements ItemSupplie
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// CraftBukkit start
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org.bukkit.event.entity.LingeringPotionSplashEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callLingeringPotionSplashEvent(this, position, entityareaeffectcloud);
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- if (!(event.isCancelled() || entityareaeffectcloud.isRemoved())) {
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+ if (!(event.isCancelled() || entityareaeffectcloud.isRemoved() || (noEffects && entityareaeffectcloud.effects.isEmpty() && entityareaeffectcloud.getPotion().getEffects().isEmpty()))) { // Paper - don't spawn area effect cloud if the effects were empty and not changed during the event handling
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this.level().addFreshEntity(entityareaeffectcloud);
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} else {
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entityareaeffectcloud.discard(null); // CraftBukkit - add Bukkit remove cause
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}
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// CraftBukkit end
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+ return !event.isCancelled(); // Paper - Fix potions splash events
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}
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public boolean isLingering() {
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diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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index 11b42f349edefb6961b61d709bfbe3ad4b55c7f8..fef616ed1deac6cf400a2f39a2eba11b94921415 100644
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--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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@@ -875,6 +875,32 @@ public class CraftEventFactory {
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return event;
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}
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+ // Paper start - Fix potions splash events
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+ public static io.papermc.paper.event.entity.WaterBottleSplashEvent callWaterBottleSplashEvent(net.minecraft.world.entity.projectile.ThrownPotion potion, @Nullable HitResult hitResult, Map<LivingEntity, Double> affectedEntities, java.util.Set<LivingEntity> rehydrate, java.util.Set<LivingEntity> extinguish) {
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+ ThrownPotion thrownPotion = (ThrownPotion) potion.getBukkitEntity();
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+
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+ Block hitBlock = null;
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+ BlockFace hitFace = null;
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+ org.bukkit.entity.Entity hitEntity = null;
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+
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+ if (hitResult != null) {
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+ if (hitResult.getType() == HitResult.Type.BLOCK) {
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+ BlockHitResult blockHitResult = (BlockHitResult) hitResult;
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+ hitBlock = CraftBlock.at(potion.level(), blockHitResult.getBlockPos());
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+ hitFace = CraftBlock.notchToBlockFace(blockHitResult.getDirection());
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+ } else if (hitResult.getType() == HitResult.Type.ENTITY) {
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+ hitEntity = ((EntityHitResult) hitResult).getEntity().getBukkitEntity();
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+ }
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+ }
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+
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+ io.papermc.paper.event.entity.WaterBottleSplashEvent event = new io.papermc.paper.event.entity.WaterBottleSplashEvent(
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+ thrownPotion, hitEntity, hitBlock, hitFace, affectedEntities, rehydrate, extinguish
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+ );
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+ event.callEvent();
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+ return event;
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+ }
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+ // Paper end - Fix potions splash events
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+
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/**
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* BlockFadeEvent
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*/
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