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 b4c91cb985d3772c5b105b8d2267b51d7483e005..3fc715e7ceb35e2309ba3ffeb19ae58cfd25fde6 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -388,6 +388,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     // 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
@@ -2125,6 +2126,10 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
                 }
                 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) {
@@ -2265,6 +2270,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
                 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 7ae0465091db8e8061737bf93884afa3db49feeb..5d6403fa27521860a69a707dc4358b013adfafd7 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -165,6 +165,7 @@ 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 5767eefb09d9e0e3a3d5a006242220b844d28055..a6009f9075035e34150ff692d38cac47930363d1 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -1301,5 +1301,10 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         //noinspection ConstantConditions
         return originVector.toLocation(world);
     }
+
+    @Override
+    public boolean fromMobSpawner() {
+        return getHandle().spawnedViaMobSpawner;
+    }
     // Paper end
 }