From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Trigary <trigary0@gmail.com>
Date: Mon, 25 Jan 2021 14:53:57 +0100
Subject: [PATCH] add DragonEggFormEvent


diff --git a/src/main/java/net/minecraft/server/EnderDragonBattle.java b/src/main/java/net/minecraft/server/EnderDragonBattle.java
index 7f11adbc5d8527b50f7657d46459516a471017b3..0d8fba494ed11ad79201dfd1c7f3ad5b288ca0ca 100644
--- a/src/main/java/net/minecraft/server/EnderDragonBattle.java
+++ b/src/main/java/net/minecraft/server/EnderDragonBattle.java
@@ -15,6 +15,7 @@ import java.util.function.Predicate;
 import javax.annotation.Nullable;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import io.papermc.paper.event.block.DragonEggFormEvent; // Paper - DragonEggFormEvent
 
 public class EnderDragonBattle {
 
@@ -358,9 +359,24 @@ public class EnderDragonBattle {
             this.bossBattle.setVisible(false);
             this.generateExitPortal(true);
             this.n();
+            // Paper start - DragonEggFormEvent
+            BlockPosition eggPosition = this.world.getHighestBlockYAt(HeightMap.Type.MOTION_BLOCKING, WorldGenEndTrophy.getPosition());
+            org.bukkit.craftbukkit.block.CraftBlock eggBlock = org.bukkit.craftbukkit.block.CraftBlock.at(this.world, eggPosition);
+            org.bukkit.craftbukkit.block.CraftBlockState eggState = new org.bukkit.craftbukkit.block.CraftBlockState(eggBlock);
+            eggState.setData(Blocks.DRAGON_EGG.getBlockData());
+            DragonEggFormEvent eggEvent = new DragonEggFormEvent(eggBlock, eggState,
+                    new org.bukkit.craftbukkit.boss.CraftDragonBattle(this));
+            // Paper end - DragonEggFormEvent
             if (this.world.paperConfig.enderDragonsDeathAlwaysPlacesDragonEgg || !this.previouslyKilled) { // Paper - always place dragon egg
-                this.world.setTypeUpdate(this.world.getHighestBlockYAt(HeightMap.Type.MOTION_BLOCKING, WorldGenEndTrophy.a), Blocks.DRAGON_EGG.getBlockData());
+                // Paper start - DragonEggFormEvent
+                //this.world.setTypeUpdate(this.world.getHighestBlockYAt(HeightMap.Type.MOTION_BLOCKING, WorldGenEndTrophy.a), Blocks.DRAGON_EGG.getBlockData());
+            } else {
+                eggEvent.setCancelled(true);
+            }
+            if (eggEvent.callEvent()) {
+                eggEvent.getNewState().update(true);
             }
+            // Paper end - DragonEggFormEvent
 
             this.previouslyKilled = true;
             this.dragonKilled = true;
diff --git a/src/main/java/net/minecraft/server/WorldGenEndTrophy.java b/src/main/java/net/minecraft/server/WorldGenEndTrophy.java
index dde3c2553adf29b6c97aa9a17b666f2e8ad4d2e6..441f3b6d57f128644ad952ab7f2d090d2140bd0c 100644
--- a/src/main/java/net/minecraft/server/WorldGenEndTrophy.java
+++ b/src/main/java/net/minecraft/server/WorldGenEndTrophy.java
@@ -5,7 +5,7 @@ import java.util.Random;
 
 public class WorldGenEndTrophy extends WorldGenerator<WorldGenFeatureEmptyConfiguration> {
 
-    public static final BlockPosition a = BlockPosition.ZERO;
+    public static final BlockPosition a = BlockPosition.ZERO; public static BlockPosition getPosition() { return a; } // Paper - OBFHELPER
     private final boolean ab;
 
     public WorldGenEndTrophy(boolean flag) {
@@ -13,7 +13,7 @@ public class WorldGenEndTrophy extends WorldGenerator<WorldGenFeatureEmptyConfig
         this.ab = flag;
     }
 
-    public boolean a(GeneratorAccessSeed generatoraccessseed, ChunkGenerator chunkgenerator, Random random, BlockPosition blockposition, WorldGenFeatureEmptyConfiguration worldgenfeatureemptyconfiguration) {
+    public boolean generate(GeneratorAccessSeed generatoraccessseed, ChunkGenerator chunkgenerator, Random random, BlockPosition blockposition, WorldGenFeatureEmptyConfiguration worldgenfeatureemptyconfiguration) { // Paper - decompile fix
         Iterator iterator = BlockPosition.a(new BlockPosition(blockposition.getX() - 4, blockposition.getY() - 1, blockposition.getZ() - 4), new BlockPosition(blockposition.getX() + 4, blockposition.getY() + 32, blockposition.getZ() + 4)).iterator();
 
         while (iterator.hasNext()) {