Paper/patches/server/0784-Call-BlockPhysicsEvent-more-often.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>
Date: Sun, 7 Aug 2022 22:16:36 +0200
Subject: [PATCH] Call BlockPhysicsEvent more often


diff --git a/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java b/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java
index 7d54abc2553f4b319df4d533a0b689c1807b6102..87db9febbbf53702be0e1e89a95db99e823713e5 100644
--- a/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java
+++ b/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java
@@ -119,7 +119,20 @@ public class CollectingNeighborUpdater implements NeighborUpdater {
         public boolean runNext(Level world) {
             BlockPos blockPos = this.sourcePos.relative(NeighborUpdater.UPDATE_ORDER[this.idx++]);
             BlockState blockState = world.getBlockState(blockPos);
-            NeighborUpdater.executeUpdate(world, blockState, blockPos, this.sourceBlock, this.sourcePos, false);
+            // Paper start - Call BlockPhysicsEvent
+            try {
+                org.bukkit.event.block.BlockPhysicsEvent event = new org.bukkit.event.block.BlockPhysicsEvent(
+                    org.bukkit.craftbukkit.block.CraftBlock.at(world, blockPos),
+                    org.bukkit.craftbukkit.block.data.CraftBlockData.fromData(blockState),
+                    org.bukkit.craftbukkit.block.CraftBlock.at(world, this.sourcePos));
+
+                if (event.callEvent()) { // continue to check for adjacent block (increase idx)
+                    NeighborUpdater.executeUpdate(world, blockState, blockPos, this.sourceBlock, this.sourcePos, false);
+                }
+            } catch (StackOverflowError ex) {
+                world.lastPhysicsProblem = blockPos;
+            }
+            // Paper end - Call BlockPhysicsEvent
             if (this.idx < NeighborUpdater.UPDATE_ORDER.length && NeighborUpdater.UPDATE_ORDER[this.idx] == this.skipDirection) {
                 ++this.idx;
             }