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 660a210c363fcb42145b273ea6b977ce4844505d..655ce0b58cc327a8dac1b006bec7dcb34964da0a 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -396,6 +396,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
     public void inactiveTick() { }
     // Spigot end
     protected int numCollisions = 0; // Paper - Cap entity collisions
+    public boolean spawnedViaMobSpawner; // Paper - Yes this name is similar to above, upstream took the better one
     // Paper start - Entity origin API
     @javax.annotation.Nullable
     private org.bukkit.util.Vector origin;
@@ -2189,6 +2190,10 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
                 }
                 nbttagcompound.put("Paper.Origin", this.newDoubleList(origin.getX(), origin.getY(), origin.getZ()));
             }
+            // Save entity's from mob spawner status
+            if (spawnedViaMobSpawner) {
+                nbttagcompound.putBoolean("Paper.FromMobSpawner", true);
+            }
             // Paper end
             return nbttagcompound;
         } catch (Throwable throwable) {
@@ -2329,6 +2334,8 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
                 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 aa54237205989f619ac6a3faa2e4285427b9e31d..43d399e1a0ba2fb0541f851a28032fa60fc01b33 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -176,6 +176,7 @@ 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 3390033bbfc8fd0715458e5faa6a65477272a80b..88e0ac38214c537ea8be5d23a17ac5a58acd3682 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -993,4 +993,11 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         return originVector.toLocation(world);
     }
     // Paper end - entity origin API
+
+    // Paper start - Entity#fromMobSpawner
+    @Override
+    public boolean fromMobSpawner() {
+        return this.getHandle().spawnedViaMobSpawner;
+    }
+    // Paper end - Entity#fromMobSpawner
 }