Fire BlockPreDispenseEvent for droppers (#10226)

patches/server/0504-Add-BlockPreDispenseEvent.patch

@@ -16,6 +16,18 @@ index 5593a0aa9e618071b6521b213dde0f628348c3dc..644e64850479cea20a98b8a65503ccf3
                      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