From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Matthew Miller <mnmiller1@me.com>
Date: Sun, 17 Jan 2021 13:16:09 +1000
Subject: [PATCH] Implement 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 501a5483160dba050261bb3448317a097cdb7ef2..2dcac4b638073aa1748f26f61219dbf95fd1ced6 100644
--- a/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
@@ -91,6 +91,7 @@ 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 - BlockPreDispenseEvent is called here
                 DispenserBlock.eventFired = false; // CraftBukkit - reset event status
                 tileentitydispenser.setItem(i, idispensebehavior.dispense(sourceblock, itemstack));
             }
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 5e030bddc8e9fe9cbe16a53242b6be8f2232fbc1..c8c3a8d8e4e5e7df66b69011ad95bb6bd6d3b6ee 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1825,5 +1825,11 @@ 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 = serverLevel.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
+        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
 }