Paper/CraftBukkit-Patches/0042-Implement-SpawnerSpawnEvent.patch

From 5007d731040f3c02b189a979c40c961f27e3e16b Mon Sep 17 00:00:00 2001
From: Andy Shulman <andy.shulman@hotmail.com>
Date: Mon, 15 Apr 2013 20:06:37 -0500
Subject: [PATCH] Implement SpawnerSpawnEvent.

Adds BUKKIT-267

diff --git a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
index 108b375..4edd5e3 100644
--- a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
+++ b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
@@ -5,7 +5,11 @@ import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
 
-import org.bukkit.event.entity.CreatureSpawnEvent; // CraftBukkit
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.entity.CreatureSpawnEvent;
+import org.bukkit.event.entity.SpawnerSpawnEvent;
+// CraftBukkit end
 
 public abstract class MobSpawnerAbstract {
 
@@ -127,7 +131,12 @@ public abstract class MobSpawnerAbstract {
 
             entity.f(nbttagcompound);
             if (entity.world != null) {
-                entity.world.addEntity(entity, CreatureSpawnEvent.SpawnReason.SPAWNER); // CraftBukkit
+                // CraftBukkit start - call SpawnerSpawnEvent, abort if cancelled
+                SpawnerSpawnEvent event = CraftEventFactory.callSpawnerSpawnEvent(entity, this.b(), this.c(), this.d());
+                if (!event.isCancelled()) {
+                    entity.world.addEntity(entity, CreatureSpawnEvent.SpawnReason.SPAWNER); // CraftBukkit
+                }
+                // CraftBukkit end
             }
 
             NBTTagCompound nbttagcompound1;
@@ -150,6 +159,11 @@ public abstract class MobSpawnerAbstract {
 
                     entity2.f(nbttagcompound2);
                     entity2.setPositionRotation(entity1.locX, entity1.locY, entity1.locZ, entity1.yaw, entity1.pitch);
+                    // CraftBukkit start - call SpawnerSpawnEvent, skip if cancelled
+                    SpawnerSpawnEvent event = CraftEventFactory.callSpawnerSpawnEvent(entity2, this.b(), this.c(), this.d());
+                    if (event.isCancelled()) {
+                        continue;
+                    }
                     if (entity.world != null) {
                         entity.world.addEntity(entity2, CreatureSpawnEvent.SpawnReason.SPAWNER); // CraftBukkit
                     }
@@ -161,7 +175,12 @@ public abstract class MobSpawnerAbstract {
             }
         } else if (entity instanceof EntityLiving && entity.world != null) {
             ((EntityInsentient) entity).a((GroupDataEntity) null);
-            this.a().addEntity(entity, CreatureSpawnEvent.SpawnReason.SPAWNER); // CraftBukkit
+            // CraftBukkit start - call SpawnerSpawnEvent, abort if cancelled
+            SpawnerSpawnEvent event = CraftEventFactory.callSpawnerSpawnEvent(entity, this.b(), this.c(), this.d());
+            if (!event.isCancelled()) {
+                this.a().addEntity(entity, CreatureSpawnEvent.SpawnReason.SPAWNER); // CraftBukkit
+            }
+            // CraftBukkit end
         }
 
         return entity;
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index cccfe75..d8f56e9 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -35,6 +35,7 @@ import org.bukkit.Server;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.BlockState;
+import org.bukkit.block.CreatureSpawner;
 import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.craftbukkit.CraftWorld;
 import org.bukkit.craftbukkit.block.CraftBlock;
@@ -115,6 +116,22 @@ public class CraftEventFactory {
     }
 
     /**
+     * Mob spawner event
+     */
+    public static SpawnerSpawnEvent callSpawnerSpawnEvent(Entity spawnee, int spawnerX, int spawnerY, int spawnerZ) {
+        org.bukkit.craftbukkit.entity.CraftEntity entity = spawnee.getBukkitEntity();
+        BlockState state = entity.getWorld().getBlockAt(spawnerX, spawnerY, spawnerZ).getState();
+
+        if (!(state instanceof CreatureSpawner)) {
+            state = null;
+        }
+
+        SpawnerSpawnEvent event = new SpawnerSpawnEvent(entity, (CreatureSpawner) state);
+        entity.getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+
+    /**
      * Bucket methods
      */
     public static PlayerBucketEmptyEvent callPlayerBucketEmptyEvent(EntityHuman who, int clickedX, int clickedY, int clickedZ, int clickedFace, ItemStack itemInHand) {
-- 
1.8.1.2