PaperMC/Spigot-Server-Patches/0571-Extend-block-drop-capture-to-capture-all-items-added.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Thu, 17 Sep 2020 00:36:05 +0100
Subject: [PATCH] Extend block drop capture to capture all items added to the
 world


diff --git a/src/main/java/net/minecraft/server/level/PlayerInteractManager.java b/src/main/java/net/minecraft/server/level/PlayerInteractManager.java
index 831bc83cdbf15f08961cc8703be348b458d47fd3..5974cc9f895478eebd4922faa26d5a944064d7b6 100644
--- a/src/main/java/net/minecraft/server/level/PlayerInteractManager.java
+++ b/src/main/java/net/minecraft/server/level/PlayerInteractManager.java
@@ -12,6 +12,7 @@ import net.minecraft.world.EnumHand;
 import net.minecraft.world.EnumInteractionResult;
 import net.minecraft.world.ITileInventory;
 import net.minecraft.world.InteractionResultWrapper;
+import net.minecraft.world.entity.item.EntityItem;
 import net.minecraft.world.entity.player.EntityHuman;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.context.ItemActionContext;
@@ -418,10 +419,12 @@ public class PlayerInteractManager {
                     // return true; // CraftBukkit
                 }
                 // CraftBukkit start
+                java.util.List<EntityItem> itemsToDrop = world.captureDrops; // Paper - store current list
+                world.captureDrops = null; // Paper - Remove this earlier so that we can actually drop stuff
                 if (event.isDropItems()) {
-                    org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockDropItemEvent(bblock, state, this.player, world.captureDrops);
+                    org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockDropItemEvent(bblock, state, this.player, itemsToDrop); // Paper - use stored ref
                 }
-                world.captureDrops = null;
+                //world.captureDrops = null; // Paper - move up
 
                 // Drop event experience
                 if (flag && event != null) {
diff --git a/src/main/java/net/minecraft/server/level/WorldServer.java b/src/main/java/net/minecraft/server/level/WorldServer.java
index ea6f7397add28e87d60834495420e52920d6e95c..1a2fc4883ed16c98a2c96881bfee7e744feb24fc 100644
--- a/src/main/java/net/minecraft/server/level/WorldServer.java
+++ b/src/main/java/net/minecraft/server/level/WorldServer.java
@@ -99,6 +99,7 @@ import net.minecraft.world.entity.animal.EntityWaterAnimal;
 import net.minecraft.world.entity.animal.horse.EntityHorseSkeleton;
 import net.minecraft.world.entity.boss.EntityComplexPart;
 import net.minecraft.world.entity.boss.enderdragon.EntityEnderDragon;
+import net.minecraft.world.entity.item.EntityItem;
 import net.minecraft.world.entity.npc.NPC;
 import net.minecraft.world.entity.player.EntityHuman;
 import net.minecraft.world.entity.raid.PersistentRaid;
@@ -1288,6 +1289,13 @@ public class WorldServer extends World implements GeneratorAccessSeed {
         } else if (this.isUUIDTaken(entity)) {
             return false;
         } else {
+            // Paper start - capture all item additions to the world
+            if (captureDrops != null && entity instanceof EntityItem) {
+                captureDrops.add((EntityItem) entity);
+                return true;
+            }
+            // Paper end
+
             if (!CraftEventFactory.doEntityAddEventCalling(this, entity, spawnReason)) {
                 return false;
             }