From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Madeline Miller <mnmiller1@me.com>
Date: Sun, 17 Jan 2021 13:16:09 +1000
Subject: [PATCH] Add BlockPreDispenseEvent


diff --git a/src/main/java/net/minecraft/world/level/block/DispenserBlock.java b/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
index 5593a0aa9e618071b6521b213dde0f628348c3dc..644e64850479cea20a98b8a65503ccf3a34fd32a 100644
--- a/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
@@ -104,6 +104,7 @@ public class DispenserBlock extends BaseEntityBlock {
                 DispenseItemBehavior idispensebehavior = this.getDispenseMethod(itemstack);
 
                 if (idispensebehavior != DispenseItemBehavior.NOOP) {
+                    if (!org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockPreDispenseEvent(world, pos, itemstack, i)) return; // Paper - Add BlockPreDispenseEvent
                     DispenserBlock.eventFired = false; // CraftBukkit - reset event status
                     tileentitydispenser.setItem(i, idispensebehavior.dispense(sourceblock, itemstack));
                 }
diff --git a/src/main/java/net/minecraft/world/level/block/DropperBlock.java b/src/main/java/net/minecraft/world/level/block/DropperBlock.java
index 1d13f8a1009d6eda351c697052d499d594a6aaa8..9a8a0fb958e8ec782111507bae957f854b2aac72 100644
--- a/src/main/java/net/minecraft/world/level/block/DropperBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DropperBlock.java
@@ -70,6 +70,7 @@ public class DropperBlock extends DispenserBlock {
                     ItemStack itemstack1;
 
                     if (iinventory == null) {
+                        if (!org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockPreDispenseEvent(world, pos, itemstack, i)) return; // Paper - Add BlockPreDispenseEvent
                         itemstack1 = DropperBlock.DISPENSE_BEHAVIOUR.dispense(sourceblock, itemstack);
                     } else {
                         // CraftBukkit start - Fire event when pushing items into other inventories
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 6a95328293e3600b7a560074a0e6083db9cd3e1f..456c1df6b5956b521e8f379b9020ed53f66a365b 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -2079,5 +2079,11 @@ public class CraftEventFactory {
         io.papermc.paper.event.block.BlockFailedDispenseEvent event = new io.papermc.paper.event.block.BlockFailedDispenseEvent(block);
         return event.callEvent();
     }
+
+    public static boolean handleBlockPreDispenseEvent(ServerLevel serverLevel, BlockPos pos, ItemStack itemStack, int slot) {
+        org.bukkit.block.Block block = CraftBlock.at(serverLevel, pos);
+        io.papermc.paper.event.block.BlockPreDispenseEvent event = new io.papermc.paper.event.block.BlockPreDispenseEvent(block, org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemStack), slot);
+        return event.callEvent();
+    }
     // Paper end
 }