From 74cfe71a9be32a6f93a58aaad1bc23d3500e1826 Mon Sep 17 00:00:00 2001
From: md_5 <git@md-5.net>
Date: Thu, 3 Mar 2016 19:45:46 +1100
Subject: [PATCH] Implement SpawnerSpawnEvent.


diff --git a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
index de82750c2..69c64e7ac 100644
--- a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
+++ b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
@@ -154,6 +154,18 @@ public abstract class MobSpawnerAbstract {
                             }
                             // Spigot End
                         }
+                        // Spigot Start
+                        if (org.bukkit.craftbukkit.event.CraftEventFactory.callSpawnerSpawnEvent(entity, blockposition).isCancelled()) {
+                            Entity vehicle = entity.getVehicle();
+                            if (vehicle != null) {
+                                vehicle.discard();
+                            }
+                            for (Entity passenger : entity.getIndirectPassengers()) {
+                                passenger.discard();
+                            }
+                            continue;
+                        }
+                        // Spigot End
 
                         if (!worldserver.tryAddFreshEntityWithPassengers(entity, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.SPAWNER)) { // CraftBukkit
                             this.delay(worldserver, blockposition);
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 87a876b2d..559cf15df 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -231,6 +231,8 @@ import org.bukkit.inventory.InventoryView;
 import org.bukkit.inventory.meta.BookMeta;
 import org.bukkit.potion.PotionEffect;
 
+import org.bukkit.event.entity.SpawnerSpawnEvent; // Spigot
+
 public class CraftEventFactory {
     public static final DamageSource MELTING = CraftDamageSource.copyOf(DamageSource.ON_FIRE);
     public static final DamageSource POISON = CraftDamageSource.copyOf(DamageSource.MAGIC);
@@ -1492,6 +1494,21 @@ public class CraftEventFactory {
         return event;
     }
 
+    /**
+     * Mob spawner event.
+     */
+    public static SpawnerSpawnEvent callSpawnerSpawnEvent(Entity spawnee, BlockPosition pos) {
+        org.bukkit.craftbukkit.entity.CraftEntity entity = spawnee.getBukkitEntity();
+        BlockState state = entity.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ()).getState();
+        if (!(state instanceof org.bukkit.block.CreatureSpawner)) {
+            state = null;
+        }
+
+        SpawnerSpawnEvent event = new SpawnerSpawnEvent(entity, (org.bukkit.block.CreatureSpawner) state);
+        entity.getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+
     public static EntityToggleGlideEvent callToggleGlideEvent(EntityLiving entity, boolean gliding) {
         EntityToggleGlideEvent event = new EntityToggleGlideEvent((LivingEntity) entity.getBukkitEntity(), gliding);
         entity.level.getCraftServer().getPluginManager().callEvent(event);
-- 
2.34.1