PaperMC/patches/server/0714-Add-various-missing-EntityDropItemEvent-calls.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Tue, 20 Jul 2021 21:35:47 -0700
Subject: [PATCH] Add various missing EntityDropItemEvent calls


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 71efd269ea055f13e3ca898bad045448e24f73da..44f585b9dc9e3940193f07a2df1205907b4800ba 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -2672,6 +2672,14 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
             stack.setCount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe
 
             entityitem.setDefaultPickUpDelay();
+            // Paper start - Call EntityDropItemEvent
+            return this.spawnAtLocation(entityitem);
+        }
+    }
+    @Nullable
+    public ItemEntity spawnAtLocation(ItemEntity entityitem) {
+        {
+            // Paper end - Call EntityDropItemEvent
             // CraftBukkit start
             EntityDropItemEvent event = new EntityDropItemEvent(this.getBukkitEntity(), (org.bukkit.entity.Item) entityitem.getBukkitEntity());
             Bukkit.getPluginManager().callEvent(event);
diff --git a/src/main/java/net/minecraft/world/entity/animal/Dolphin.java b/src/main/java/net/minecraft/world/entity/animal/Dolphin.java
index 33170f2f1d3f030fbf342e44a1baa109a34c31a7..b99e5878b3094ba25084b756c058510bc39f941a 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Dolphin.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Dolphin.java
@@ -604,7 +604,7 @@ public class Dolphin extends AgeableWaterCreature {
                 float f2 = 0.02F * Dolphin.this.random.nextFloat();
 
                 entityitem.setDeltaMovement((double) (0.3F * -Mth.sin(Dolphin.this.getYRot() * 0.017453292F) * Mth.cos(Dolphin.this.getXRot() * 0.017453292F) + Mth.cos(f1) * f2), (double) (0.3F * Mth.sin(Dolphin.this.getXRot() * 0.017453292F) * 1.5F), (double) (0.3F * Mth.cos(Dolphin.this.getYRot() * 0.017453292F) * Mth.cos(Dolphin.this.getXRot() * 0.017453292F) + Mth.sin(f1) * f2));
-                Dolphin.this.level().addFreshEntity(entityitem);
+                Dolphin.this.spawnAtLocation(entityitem); // Paper - Call EntityDropItemEvent
             }
         }
     }
diff --git a/src/main/java/net/minecraft/world/entity/animal/Fox.java b/src/main/java/net/minecraft/world/entity/animal/Fox.java
index 205aefd38a185fa411ff17cfb0155769de8fc2fd..ca45a8ccf7f4593d557d157470603e4d233d948d 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Fox.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Fox.java
@@ -492,14 +492,14 @@ public class Fox extends Animal implements VariantHolder<Fox.Variant> {
             entityitem.setPickUpDelay(40);
             entityitem.setThrower(this);
             this.playSound(SoundEvents.FOX_SPIT, 1.0F, 1.0F);
-            this.level().addFreshEntity(entityitem);
+            this.spawnAtLocation(entityitem); // Paper - Call EntityDropItemEvent
         }
     }
 
     private void dropItemStack(ItemStack stack) {
         ItemEntity entityitem = new ItemEntity(this.level(), this.getX(), this.getY(), this.getZ(), stack);
 
-        this.level().addFreshEntity(entityitem);
+        this.spawnAtLocation(entityitem); // Paper - Call EntityDropItemEvent
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java b/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java
index 14e02f9b0169db8388c515a68315ad5cc3f13d22..dbcf14f5af9c9c0655a82529ee99450a8da14525 100644
--- a/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java
+++ b/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java
@@ -365,8 +365,7 @@ public class Goat extends Animal {
             double d2 = (double) Mth.randomBetween(this.random, -0.2F, 0.2F);
             ItemEntity entityitem = new ItemEntity(this.level(), vec3d.x(), vec3d.y(), vec3d.z(), itemstack, d0, d1, d2);
 
-            this.level().addFreshEntity(entityitem);
-            return true;
+            return this.spawnAtLocation(entityitem) != null; // Paper - Call EntityDropItemEvent
         }
     }
 
diff --git a/src/main/java/net/minecraft/world/entity/animal/sniffer/Sniffer.java b/src/main/java/net/minecraft/world/entity/animal/sniffer/Sniffer.java
index 5e586f174ff4b610a2584f28c9ffdd445ad58bea..0395b120590552518a85f36a46b68532e936de49 100644
--- a/src/main/java/net/minecraft/world/entity/animal/sniffer/Sniffer.java
+++ b/src/main/java/net/minecraft/world/entity/animal/sniffer/Sniffer.java
@@ -345,8 +345,9 @@ public class Sniffer extends Animal {
 
         entityitem.setDefaultPickUpDelay();
         this.finalizeSpawnChildFromBreeding(world, other, (AgeableMob) null);
+        if (this.spawnAtLocation(entityitem) != null) { // Paper - Call EntityDropItemEvent
         this.playSound(SoundEvents.SNIFFER_EGG_PLOP, 1.0F, (this.random.nextFloat() - this.random.nextFloat()) * 0.2F + 0.5F);
-        world.addFreshEntity(entityitem);
+        } // Paper - Call EntityDropItemEvent
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/item/ItemUtils.java b/src/main/java/net/minecraft/world/item/ItemUtils.java
index f4fc17e029407be5df3cfe2dcb6fb2f88234b066..0c4074ed8b4fd9d6fcb838e8843d66f6f286ed5d 100644
--- a/src/main/java/net/minecraft/world/item/ItemUtils.java
+++ b/src/main/java/net/minecraft/world/item/ItemUtils.java
@@ -41,7 +41,15 @@ public class ItemUtils {
     public static void onContainerDestroyed(ItemEntity itemEntity, Iterable<ItemStack> contents) {
         Level level = itemEntity.level();
         if (!level.isClientSide) {
-            contents.forEach(stack -> level.addFreshEntity(new ItemEntity(level, itemEntity.getX(), itemEntity.getY(), itemEntity.getZ(), stack)));
+            // Paper start - call EntityDropItemEvent
+            contents.forEach(stack -> {
+                ItemEntity droppedItem = new ItemEntity(level, itemEntity.getX(), itemEntity.getY(), itemEntity.getZ(), stack);
+                org.bukkit.event.entity.EntityDropItemEvent event = new org.bukkit.event.entity.EntityDropItemEvent(itemEntity.getBukkitEntity(), (org.bukkit.entity.Item) droppedItem.getBukkitEntity());
+                if (event.callEvent()) {
+                    level.addFreshEntity(droppedItem);
+                }
+            });
+            // Paper end - call EntityDropItemEvent
         }
     }
 }