PaperMC/nms-patches/BlockDragonEgg.patch

--- a/net/minecraft/server/BlockDragonEgg.java
+++ b/net/minecraft/server/BlockDragonEgg.java
@@ -2,6 +2,8 @@
 
 import java.util.Random;
 
+import org.bukkit.event.block.BlockFromToEvent; // CraftBukkit
+
 public class BlockDragonEgg extends Block {
 
     public BlockDragonEgg() {
@@ -61,6 +63,18 @@
                 BlockPosition blockposition1 = blockposition.a(world.random.nextInt(16) - world.random.nextInt(16), world.random.nextInt(8) - world.random.nextInt(8), world.random.nextInt(16) - world.random.nextInt(16));
 
                 if (world.getType(blockposition1).getBlock().material == Material.AIR) {
+                    // CraftBukkit start
+                    org.bukkit.block.Block from = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+                    org.bukkit.block.Block to = world.getWorld().getBlockAt(blockposition1.getX(), blockposition1.getY(), blockposition1.getZ());
+                    BlockFromToEvent event = new BlockFromToEvent(from, to);
+                    org.bukkit.Bukkit.getPluginManager().callEvent(event);
+
+                    if (event.isCancelled()) {
+                        return;
+                    }
+
+                    blockposition1 = new BlockPosition(event.getToBlock().getX(), event.getToBlock().getY(), event.getToBlock().getZ());
+                    // CraftBukkit end
                     if (world.isClientSide) {
                         for (int j = 0; j < 128; ++j) {
                             double d0 = world.random.nextDouble();