Trigger EntityBlockChangeEvent for Silverfish. Adds BUKKIT-1560 and BUKKIT-1593

src/main/java/net/minecraft/server/EntitySilverfish.java

@@ -1,5 +1,7 @@
 package net.minecraft.server;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public class EntitySilverfish extends EntityMonster {
 
     private int a;
@@ -96,6 +98,11 @@ public class EntitySilverfish extends EntityMonster {
                                 int k1 = this.world.getTypeId(i + i1, j + l, k + j1);
 
                                 if (k1 == Block.MONSTER_EGGS.id) {
+                                    // CraftBukkit start
+                                    if (CraftEventFactory.callEntityChangeBlockEvent(this, i + i1, j + l, k + j1, 0).isCancelled()) {
+                                        continue;
+                                    }
+                                    // CraftBukkit end
                                     this.world.triggerEffect(2001, i + i1, j + l, k + j1, Block.MONSTER_EGGS.id + (this.world.getData(i + i1, j + l, k + j1) << 12));
                                     this.world.setTypeId(i + i1, j + l, k + j1, 0);
                                     Block.MONSTER_EGGS.postBreak(this.world, i + i1, j + l, k + j1, 0);
@@ -118,6 +125,11 @@ public class EntitySilverfish extends EntityMonster {
 
                 l = this.world.getTypeId(i + Facing.b[l1], j + Facing.c[l1], k + Facing.d[l1]);
                 if (BlockMonsterEggs.d(l)) {
+                    // CraftBukkit start
+                    if (CraftEventFactory.callEntityChangeBlockEvent(this, i + Facing.b[l1], j + Facing.c[l1], k + Facing.d[l1], Block.MONSTER_EGGS.id).isCancelled()) {
+                        return;
+                    }
+                    // CraftBukkit end
                     this.world.setTypeIdAndData(i + Facing.b[l1], j + Facing.c[l1], k + Facing.d[l1], Block.MONSTER_EGGS.id, BlockMonsterEggs.e(l));
                     this.aC();
                     this.die();

src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java

@@ -441,6 +441,13 @@ public class CraftEventFactory {
         return event;
     }
 
+    public static EntityChangeBlockEvent callEntityChangeBlockEvent(Entity entity, int x, int y, int z, int type) {
+        Block block = entity.world.getWorld().getBlockAt(x, y, z);
+        Material material = Material.getMaterial(type);
+
+        return callEntityChangeBlockEvent(entity, block, material);
+    }
+
     public static CreeperPowerEvent callCreeperPowerEvent(Entity creeper, Entity lightning, CreeperPowerEvent.PowerCause cause) {
         CreeperPowerEvent event = new CreeperPowerEvent((Creeper) creeper.getBukkitEntity(), (LightningStrike) lightning.getBukkitEntity(), cause);
         creeper.getBukkitEntity().getServer().getPluginManager().callEvent(event);