Paper/patches/server/0021-Player-affects-spawning-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Tue, 1 Mar 2016 14:47:52 -0600
Subject: [PATCH] Player affects spawning API


diff --git a/src/main/java/net/minecraft/world/entity/EntitySelector.java b/src/main/java/net/minecraft/world/entity/EntitySelector.java
index 195989667c7d844399a72787819f62a3fd0d9c78..d17b75ad13bbc8a38cdc2f2d77ee5d88438cec31 100644
--- a/src/main/java/net/minecraft/world/entity/EntitySelector.java
+++ b/src/main/java/net/minecraft/world/entity/EntitySelector.java
@@ -28,6 +28,11 @@ public final class EntitySelector {
     };
 
     private EntitySelector() {}
+    // Paper start
+    public static final Predicate<Entity> affectsSpawning = (entity) -> {
+        return !entity.isSpectator() && entity.isAlive() && (entity instanceof net.minecraft.server.level.ServerPlayer) && ((net.minecraft.server.level.ServerPlayer) entity).affectsSpawning;
+    };
+    // Paper end
 
     public static Predicate<Entity> withinDistance(double x, double y, double z, double max) {
         double d4 = max * max;
diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index f8dcd9cb5e6d223f4f5445a4172cc6c4ea160313..78e2d0165f6f6da4d7d1e1dad76e5edcbe48df9e 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -767,7 +767,7 @@ public abstract class Mob extends LivingEntity {
         if (this.level.getDifficulty() == Difficulty.PEACEFUL && this.shouldDespawnInPeaceful()) {
             this.discard();
         } else if (!this.isPersistenceRequired() && !this.requiresCustomPersistence()) {
-            Player entityhuman = this.level.getNearestPlayer(this, -1.0D);
+            Player entityhuman = this.level.findNearbyPlayer(this, -1.0D, EntitySelector.affectsSpawning); // Paper
 
             if (entityhuman != null) {
                 double d0 = entityhuman.distanceToSqr((Entity) this); // CraftBukkit - decompile error
diff --git a/src/main/java/net/minecraft/world/entity/monster/Silverfish.java b/src/main/java/net/minecraft/world/entity/monster/Silverfish.java
index 7d741c2aebbc1c6cf1ff59cca6480325db6ca29c..2459ae800a5f6b234a4f4bb1cd3738e4e9cac67d 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Silverfish.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Silverfish.java
@@ -123,7 +123,7 @@ public class Silverfish extends Monster {
         if (checkAnyLightMonsterSpawnRules(type, world, spawnReason, pos, random)) {
             Player entityhuman = world.getNearestPlayer((double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D, 5.0D, true);
 
-            return entityhuman == null;
+            return !(entityhuman != null && !entityhuman.affectsSpawning) && entityhuman == null; // Paper - Affects Spawning API
         } else {
             return false;
         }
diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
index 05c292d08ac98fad408b279d2426ff08472a959c..484b1bf43b897c5ffe47baa340957e3293c7bf92 100644
--- a/src/main/java/net/minecraft/world/entity/player/Player.java
+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
@@ -176,6 +176,9 @@ public abstract class Player extends LivingEntity {
     private final ItemCooldowns cooldowns;
     @Nullable
     public FishingHook fishing;
+    // Paper start
+    public boolean affectsSpawning = true;
+    // Paper end
 
     // CraftBukkit start
     public boolean fauxSleeping;
diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
index 03bdbb832ff6a86f2dac9c008de45f3bb53aa688..a003e1c0d99a4d4c88269ea5bad250ba73bbc9c9 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -77,7 +77,7 @@ public abstract class BaseSpawner {
     }
 
     private boolean isNearPlayer(Level world, BlockPos pos) {
-        return world.hasNearbyAlivePlayer((double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D, (double) this.requiredPlayerRange);
+        return world.isAffectsSpawningPlayerNearby((double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D, (double) this.requiredPlayerRange); // Paper
     }
 
     public void clientTick(Level world, BlockPos pos) {
diff --git a/src/main/java/net/minecraft/world/level/EntityGetter.java b/src/main/java/net/minecraft/world/level/EntityGetter.java
index 389985e022b82c675fb21f363422471bd15b84b0..849616d9ad140285f7aa4d2ffafd6371f3904bd5 100644
--- a/src/main/java/net/minecraft/world/level/EntityGetter.java
+++ b/src/main/java/net/minecraft/world/level/EntityGetter.java
@@ -71,8 +71,8 @@ public interface EntityGetter {
         }
     }
 
-    @Nullable
-    default Player getNearestPlayer(double x, double y, double z, double maxDistance, @Nullable Predicate<Entity> targetPredicate) {
+    default Player findNearbyPlayer(Entity entity, double d0, @Nullable Predicate<Entity> predicate) { return this.getNearestPlayer(entity.getX(), entity.getY(), entity.getZ(), d0, predicate); } // Paper
+    @Nullable default Player getNearestPlayer(double x, double y, double z, double maxDistance, @Nullable Predicate<Entity> targetPredicate) { // Paper
         double d = -1.0D;
         Player player = null;
 
@@ -100,6 +100,27 @@ public interface EntityGetter {
         return this.getNearestPlayer(x, y, z, maxDistance, predicate);
     }
 
+    // Paper end
+    default boolean isAffectsSpawningPlayerNearby(double d0, double d1, double d2, double d3) {
+        java.util.Iterator iterator = this.players().iterator();
+        double d4;
+        do {
+            Player entityhuman;
+            do {
+                if (!iterator.hasNext()) {
+                    return false;
+                }
+
+                entityhuman = (Player) iterator.next();
+            } while (!EntitySelector.affectsSpawning.test(entityhuman));
+
+            d4 = entityhuman.distanceToSqr(d0, d1, d2);
+        } while (d3 >= 0.0D && d4 >= d3 * d3);
+
+        return true;
+    }
+    // Paper end
+
     default boolean hasNearbyAlivePlayer(double x, double y, double z, double range) {
         for(Player player : this.players()) {
             if (EntitySelector.NO_SPECTATORS.test(player) && EntitySelector.LIVING_ENTITY_STILL_ALIVE.test(player)) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index cc97a1fb78037e4b09ebe825b5135702f2f19e00..ff239a739ec8c72da82b142a3ecb7f55772e6e0d 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -1778,8 +1778,20 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     @Override
     public String getLocale() {
         return this.getHandle().locale;
+
+    }
+
+    // Paper start
+    public void setAffectsSpawning(boolean affects) {
+        this.getHandle().affectsSpawning = affects;
     }
 
+    @Override
+    public boolean getAffectsSpawning() {
+        return this.getHandle().affectsSpawning;
+    }
+    // Paper end
+
     @Override
     public void updateCommands() {
         if (this.getHandle().connection == null) return;