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 23342cd50e4722dd80c0d32057b6473f68963652..01b3dca8b90d38c5fbe23e72769f54bd87144772 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -321,6 +321,7 @@ 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
@@ -1860,6 +1861,10 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
                 nbt.setUUID("Paper.OriginWorld", originWorld);
                 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) {
@@ -1997,6 +2002,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
                 this.originWorld = originWorld;
                 origin = new org.bukkit.util.Vector(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..e310c1eb1108780bcff4d7ba9d49cefa2926287c 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -166,6 +166,7 @@ public abstract class BaseSpawner {
                             }
                             // Spigot End
                         }
+                        entity.spawnedViaMobSpawner = true; // Paper
                         // Spigot Start
                         if (org.bukkit.craftbukkit.event.CraftEventFactory.callSpawnerSpawnEvent(entity, pos).isCancelled()) {
                             Entity vehicle = entity.getVehicle();
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index 52f9c17558ed19e7ff3e913287bcd4f6014630fe..e132d38199766e3e787169501d8bb05964506e0f 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -1144,5 +1144,10 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         //noinspection ConstantConditions
         return originVector.toLocation(world);
     }
+
+    @Override
+    public boolean fromMobSpawner() {
+        return getHandle().spawnedViaMobSpawner;
+    }
     // Paper end
 }