PaperMC/Spigot-Server-Patches/0197-PreCreatureSpawnEvent.patch
Zach Brown 70ce6ce831
Move version command update checking to the implementation
This makes it easier for downstream projects (forks) to replace the
version fetching system with their own. It is as simple as implementing
an interface and overriding the default implementation of
org.bukkit.UnsafeValues#getVersionFetcher()

It also makes it easier for us to organize things like the version
history feature.

Lastly I have updated the paper implementation to check against the site
API rather than against jenkins.
2019-05-27 04:13:41 -05:00

102 lines
5.9 KiB
Diff

From c5e3b702cf65b17d698c24701f07f1b2bed64823 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/server/EntityTypes.java b/src/main/java/net/minecraft/server/EntityTypes.java
index 98eb0d24c..77d4bbce1 100644
--- a/src/main/java/net/minecraft/server/EntityTypes.java
+++ b/src/main/java/net/minecraft/server/EntityTypes.java
@@ -271,6 +271,7 @@ public class EntityTypes<T extends Entity> {
return this.bf;
}
+ public final MinecraftKey getKey() { return this.g(); } // Paper - OBFHELPER
public MinecraftKey g() {
if (this.bg == null) {
MinecraftKey minecraftkey = IRegistry.ENTITY_TYPE.getKey(this);
diff --git a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
index 93fad14d3..55764deec 100644
--- a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
+++ b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
@@ -103,6 +103,27 @@ public abstract class MobSpawnerAbstract {
double d4 = j >= 2 ? nbttaglist.h(1) : (double) (blockposition.getY() + world.random.nextInt(3) - 1);
double d5 = j >= 3 ? nbttaglist.h(2) : (double) blockposition.getZ() + (world.random.nextDouble() - world.random.nextDouble()) * (double) this.spawnRange + 0.5D;
+ // Paper start
+ EntityTypes entityType = optional.get();
+ String key = entityType.getKey().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
+
if (world.c(((EntityTypes) optional.get()).a(d3, d4, d5))) {
Entity entity = EntityTypes.a(nbttagcompound, world, (entity1) -> {
entity1.setPositionRotation(d3, d4, d5, entity1.yaw, entity1.pitch);
diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
index cbf05926a..14e2f3ca7 100644
--- a/src/main/java/net/minecraft/server/SpawnerCreature.java
+++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
@@ -38,7 +38,7 @@ public final class SpawnerCreature {
BiomeBase.BiomeMeta biomebase_biomemeta = null;
GroupDataEntity groupdataentity = null;
int l1 = MathHelper.f(Math.random() * 4.0D);
- int i2 = 0;
+ int i2 = 0; // Paper - force diff on name change
int j2 = 0;
while (true) {
@@ -74,6 +74,25 @@ public final class SpawnerCreature {
if (entitypositiontypes_surface != null && a(entitypositiontypes_surface, (IWorldReader) world, (BlockPosition) blockposition_mutableblockposition, entitytypes) && world.c(entitytypes.a((double) f, (double) k, (double) f1))) {
EntityInsentient entityinsentient;
+ // Paper start
+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
+ EntityTypes<?> cls = biomebase_biomemeta.b;
+ org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(cls.getKey().getKey());
+ if (type != null) {
+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+ MCUtil.toLocation(world, blockposition_mutableblockposition),
+ type, SpawnReason.NATURAL
+ );
+ if (!event.callEvent()) {
+ if (event.shouldAbortSpawn()) {
+ return;
+ }
+ ++i2;
+ continue;
+ }
+ }
+ // Paper end
+
try {
Entity entity = entitytypes.a(world);
--
2.21.0