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 ffd38defdd9b56b1849a3b4e312de2cff7b964c2..ba96a1c657d4e81076536d0d6432e4d6584bda2c 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -393,6 +393,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
     // Spigot end
     // Paper start
     protected int numCollisions = 0; // Paper
+    public boolean spawnedViaMobSpawner; // Paper - Yes this name is similar to above, upstream took the better one
     @javax.annotation.Nullable
     private org.bukkit.util.Vector origin;
     @javax.annotation.Nullable
@@ -2200,6 +2201,10 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
                 }
                 nbttagcompound.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 nbttagcompound;
         } catch (Throwable throwable) {
@@ -2340,6 +2345,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
                 this.originWorld = originWorld;
                 origin = new org.bukkit.util.Vector(originTag.getDouble(0), originTag.getDouble(1), originTag.getDouble(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 bd48f49d50709354abc5bcff155b5abb9ab20191..1a5fb001e28997a113ad8133e9dc946206b85c35 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -167,6 +167,7 @@ public abstract class BaseSpawner {
                             // Spigot End
                         }
 
+                        entity.spawnedViaMobSpawner = true; // Paper
                         // CraftBukkit start
                         if (org.bukkit.craftbukkit.event.CraftEventFactory.callSpawnerSpawnEvent(entity, pos).isCancelled()) {
                             continue;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index 6100b2e718954b40f63ed30ab32e1dea4edba9a6..09cae000b1ff23ab3a0f2a43d83bc7ec05b5623f 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -1361,5 +1361,10 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         //noinspection ConstantConditions
         return originVector.toLocation(world);
     }
+
+    @Override
+    public boolean fromMobSpawner() {
+        return getHandle().spawnedViaMobSpawner;
+    }
     // Paper end
 }