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Paper/Spigot-Server-Patches/0186-PreCreatureSpawnEvent.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 14 Jan 2018 17:01:31 -0500
Subject: [PATCH] PreCreatureSpawnEvent
Adds an event to fire before an Entity is created, so that plugins that need to cancel
CreatureSpawnEvent can do so from this event instead.
Cancelling CreatureSpawnEvent rapidly causes a lot of garbage collection and CPU waste
as it's done after the Entity object has been fully created.
Mob Limiting plugins and blanket "ban this type of monster" plugins should use this event
instead and save a lot of server resources.
See: https://github.com/PaperMC/Paper/issues/917
diff --git a/src/main/java/net/minecraft/world/entity/EntityTypes.java b/src/main/java/net/minecraft/world/entity/EntityTypes.java
index a707ba365e25ea15e2e9d22110696b6136aa0c6f..1355c074353611669c947cb0f06c67be0ab418aa 100644
--- a/src/main/java/net/minecraft/world/entity/EntityTypes.java
+++ b/src/main/java/net/minecraft/world/entity/EntityTypes.java
@@ -17,6 +17,7 @@ import net.minecraft.nbt.NBTTagList;
import net.minecraft.network.chat.ChatMessage;
import net.minecraft.network.chat.IChatBaseComponent;
import net.minecraft.resources.MinecraftKey;
+import net.minecraft.server.MCUtil;
import net.minecraft.server.MinecraftServer;
import net.minecraft.server.level.WorldServer;
import net.minecraft.tags.Tag;
@@ -317,6 +318,20 @@ public class EntityTypes<T extends Entity> {
@Nullable
public T spawnCreature(WorldServer worldserver, @Nullable NBTTagCompound nbttagcompound, @Nullable IChatBaseComponent ichatbasecomponent, @Nullable EntityHuman entityhuman, BlockPosition blockposition, EnumMobSpawn enummobspawn, boolean flag, boolean flag1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason) {
+ // Paper start - Call PreCreatureSpawnEvent
+ org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(EntityTypes.getName(this).getKey());
+ if (type != null) {
+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+ MCUtil.toLocation(worldserver, blockposition),
+ type,
+ spawnReason
+ );
+ if (!event.callEvent()) {
+ return null;
+ }
+ }
+ // Paper end
T t0 = this.createCreature(worldserver, nbttagcompound, ichatbasecomponent, entityhuman, blockposition, enummobspawn, flag, flag1);
if (t0 != null) {
diff --git a/src/main/java/net/minecraft/world/entity/ai/sensing/SensorGolemLastSeen.java b/src/main/java/net/minecraft/world/entity/ai/sensing/SensorGolemLastSeen.java
index 41f1aecbf6b506231a1b3b525fe0ce23b35c7840..6c01e460d3a1ff7f865ebc34dfd28d55b16aab98 100644
--- a/src/main/java/net/minecraft/world/entity/ai/sensing/SensorGolemLastSeen.java
+++ b/src/main/java/net/minecraft/world/entity/ai/sensing/SensorGolemLastSeen.java
@@ -33,7 +33,7 @@ public class SensorGolemLastSeen extends Sensor<EntityLiving> {
Optional<List<EntityLiving>> optional = entityliving.getBehaviorController().getMemory(MemoryModuleType.MOBS);
if (optional.isPresent()) {
- boolean flag = ((List) optional.get()).stream().anyMatch((entityliving1) -> {
+ boolean flag = optional.get().stream().anyMatch((entityliving1) -> { // Paper - decompile fixes
return entityliving1.getEntityType().equals(EntityTypes.IRON_GOLEM);
});
@@ -44,6 +44,7 @@ public class SensorGolemLastSeen extends Sensor<EntityLiving> {
}
}
+ public static void setDetectedRecently(EntityLiving entityLiving) { b(entityLiving); } // Paper - OBFHELPER
public static void b(EntityLiving entityliving) {
entityliving.getBehaviorController().a(MemoryModuleType.GOLEM_DETECTED_RECENTLY, true, 600L);
}
diff --git a/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java b/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java
index 0c579cff2fcabd15a2a0af919fcc60b4e7ce25ad..858bbfbc08a5f2e1ef93ff52d6708059b32fbbbf 100644
--- a/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java
@@ -30,6 +30,7 @@ import net.minecraft.network.protocol.game.PacketDebug;
import net.minecraft.network.syncher.DataWatcher;
import net.minecraft.network.syncher.DataWatcherObject;
import net.minecraft.network.syncher.DataWatcherRegistry;
+import net.minecraft.server.MCUtil;
import net.minecraft.server.MinecraftServer;
import net.minecraft.server.level.WorldServer;
import net.minecraft.sounds.SoundEffect;
@@ -943,6 +944,21 @@ public class EntityVillager extends EntityVillagerAbstract implements Reputation
BlockPosition blockposition1 = this.a(blockposition, d0, d1);
if (blockposition1 != null) {
+ // Paper start - Call PreCreatureSpawnEvent
+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+ MCUtil.toLocation(world, blockposition1),
+ org.bukkit.entity.EntityType.IRON_GOLEM,
+ org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.VILLAGE_DEFENSE
+ );
+ if (!event.callEvent()) {
+ if (event.shouldAbortSpawn()) {
+ SensorGolemLastSeen.b(this); // Set Golem Last Seen to stop it from spawning another one
+ return null;
+ }
+ break;
+ }
+ // Paper end
EntityIronGolem entityirongolem = (EntityIronGolem) EntityTypes.IRON_GOLEM.createCreature(worldserver, (NBTTagCompound) null, (IChatBaseComponent) null, (EntityHuman) null, blockposition1, EnumMobSpawn.MOB_SUMMONED, false, false);
if (entityirongolem != null) {
diff --git a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
index 883c724fbb86a84ee903b5e7127f14726fe4cf24..d4b8126f12fdf7d9b4f882d3ed7d8da544ed9e8a 100644
--- a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
+++ b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
@@ -12,6 +12,7 @@ import net.minecraft.core.particles.Particles;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.resources.MinecraftKey;
+import net.minecraft.server.MCUtil;
import net.minecraft.server.level.WorldServer;
import net.minecraft.util.UtilColor;
import net.minecraft.util.WeightedRandom;
@@ -125,6 +126,27 @@ public abstract class MobSpawnerAbstract {
WorldServer worldserver = (WorldServer) world;
if (EntityPositionTypes.a((EntityTypes) optional.get(), worldserver, EnumMobSpawn.SPAWNER, new BlockPosition(d3, d4, d5), world.getRandom())) {
+ // Paper start
+ EntityTypes<?> entityType = optional.get();
+ String key = EntityTypes.getName(entityType).getKey();
+
+ org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(key);
+ if (type != null) {
+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+ MCUtil.toLocation(world, d3, d4, d5),
+ type,
+ org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.SPAWNER
+ );
+ if (!event.callEvent()) {
+ flag = true;
+ if (event.shouldAbortSpawn()) {
+ break;
+ }
+ continue;
+ }
+ }
+ // Paper end
Entity entity = EntityTypes.a(nbttagcompound, world, (entity1) -> {
entity1.setPositionRotation(d3, d4, d5, entity1.yaw, entity1.pitch);
return entity1;
diff --git a/src/main/java/net/minecraft/world/level/SpawnerCreature.java b/src/main/java/net/minecraft/world/level/SpawnerCreature.java
index fd0595fd584046326eccacdf0a6afe40c5e84eed..1969d1002b3182338614a2be0519fcdc385b7a44 100644
--- a/src/main/java/net/minecraft/world/level/SpawnerCreature.java
+++ b/src/main/java/net/minecraft/world/level/SpawnerCreature.java
@@ -15,6 +15,7 @@ import net.minecraft.core.EnumDirection;
import net.minecraft.core.IPosition;
import net.minecraft.core.IRegistry;
import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.server.MCUtil;
import net.minecraft.server.level.WorldServer;
import net.minecraft.tags.Tag;
import net.minecraft.tags.TagsBlock;
@@ -216,9 +217,16 @@ public final class SpawnerCreature {
j1 = biomesettingsmobs_c.d + worldserver.random.nextInt(1 + biomesettingsmobs_c.e - biomesettingsmobs_c.d);
}
- if (a(worldserver, enumcreaturetype, structuremanager, chunkgenerator, biomesettingsmobs_c, blockposition_mutableblockposition, d2) && spawnercreature_c.test(biomesettingsmobs_c.c, blockposition_mutableblockposition, ichunkaccess)) {
+ // Paper start
+ Boolean doSpawning = a(worldserver, enumcreaturetype, structuremanager, chunkgenerator, biomesettingsmobs_c, blockposition_mutableblockposition, d2);
+ if (doSpawning == null) {
+ return;
+ }
+ if (doSpawning && spawnercreature_c.test(biomesettingsmobs_c.c, blockposition_mutableblockposition, ichunkaccess)) {
+ // Paper end
EntityInsentient entityinsentient = a(worldserver, biomesettingsmobs_c.c);
+
if (entityinsentient == null) {
return;
}
@@ -271,8 +279,24 @@ public final class SpawnerCreature {
}
}
- private static boolean a(WorldServer worldserver, EnumCreatureType enumcreaturetype, StructureManager structuremanager, ChunkGenerator chunkgenerator, BiomeSettingsMobs.c biomesettingsmobs_c, BlockPosition.MutableBlockPosition blockposition_mutableblockposition, double d0) {
+ private static Boolean a(WorldServer worldserver, EnumCreatureType enumcreaturetype, StructureManager structuremanager, ChunkGenerator chunkgenerator, BiomeSettingsMobs.c biomesettingsmobs_c, BlockPosition.MutableBlockPosition blockposition_mutableblockposition, double d0) { // Paper
EntityTypes<?> entitytypes = biomesettingsmobs_c.c;
+ // Paper start
+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
+ org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(EntityTypes.getName(entitytypes).getKey());
+ if (type != null) {
+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+ MCUtil.toLocation(worldserver, blockposition_mutableblockposition),
+ type, SpawnReason.NATURAL
+ );
+ if (!event.callEvent()) {
+ if (event.shouldAbortSpawn()) {
+ return null;
+ }
+ return false;
+ }
+ }
+ // Paper end
if (entitytypes.e() == EnumCreatureType.MISC) {
return false;
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