From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Sun, 18 Jun 2017 18:17:05 -0500
Subject: [PATCH] Entity#fromMobSpawner()


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 0204bde9802429aca5470c235cb10232e5c8f58a..bc15a3d8f3807caee357d55952b51326db51253f 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -301,6 +301,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
     public final org.spigotmc.ActivationRange.ActivationType activationType = org.spigotmc.ActivationRange.initializeEntityActivationType(this);
     public final boolean defaultActivationState;
     public long activatedTick = Integer.MIN_VALUE;
+    public boolean spawnedViaMobSpawner; // Paper - Yes this name is similar to above, upstream took the better one
     protected int numCollisions = 0; // Paper
     public void inactiveTick() { }
     // Spigot end
@@ -1840,6 +1841,10 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
                 nbt.setUUID("Paper.OriginWorld", origin.getWorld().getUID());
                 nbt.put("Paper.Origin", this.newDoubleList(origin.getX(), origin.getY(), origin.getZ()));
             }
+            // Save entity's from mob spawner status
+            if (spawnedViaMobSpawner) {
+                nbt.putBoolean("Paper.FromMobSpawner", true);
+            }
             // Paper end
             return nbt;
         } catch (Throwable throwable) {
@@ -1976,6 +1981,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
                 }
                 origin = new org.bukkit.Location(originWorld, originTag.getDoubleAt(0), originTag.getDoubleAt(1), originTag.getDoubleAt(2));
             }
+
+            spawnedViaMobSpawner = nbt.getBoolean("Paper.FromMobSpawner"); // Restore entity's from mob spawner status
             // Paper end
 
         } catch (Throwable throwable) {
diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
index 037dafb59e54047d1d54474c44897d35b8f46c98..59996bb75dc050f51cadb31ad57c25eb46485f52 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -160,6 +160,7 @@ public abstract class BaseSpawner {
                             if (this.nextSpawnData.getTag().size() == 1 && this.nextSpawnData.getTag().contains("id", 8)) {
                                 ((Mob) entity).finalizeSpawn(world, world.getCurrentDifficultyAt(entity.blockPosition()), MobSpawnType.SPAWNER, (SpawnGroupData) null, (CompoundTag) null);
                             }
+                            entity.spawnedViaMobSpawner = true; // Paper
                             // Spigot Start
                             if (entityinsentient.level.spigotConfig.nerfSpawnerMobs) {
                                 entityinsentient.aware = false;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index 271b4e3354c3885e38ae0c547edba48bf06f1e19..1fd891b53c54153c28d636b2679b4a083510ba3c 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -1133,5 +1133,10 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         Location origin = getHandle().origin;
         return origin == null ? null : origin.clone();
     }
+
+    @Override
+    public boolean fromMobSpawner() {
+        return getHandle().spawnedViaMobSpawner;
+    }
     // Paper end
 }