Paper/patches/server/0794-Fix-cancelled-powdered-snow-bucket-placement.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Fri, 8 Oct 2021 13:12:58 -0700
Subject: [PATCH] Fix cancelled powdered snow bucket placement

Cancelling the placement of powdered snow from the powdered
snow bucket didn't revert grass that became snowy because of the
placement.

diff --git a/src/main/java/net/minecraft/world/item/BlockItem.java b/src/main/java/net/minecraft/world/item/BlockItem.java
index e581dc10f3c805f7f8b6e4c842092609e7e1a0f8..b0204af850ee182773ad458208cccd946ad148d5 100644
--- a/src/main/java/net/minecraft/world/item/BlockItem.java
+++ b/src/main/java/net/minecraft/world/item/BlockItem.java
@@ -117,6 +117,7 @@ public class BlockItem extends Item {
                                 blockstate.update(true, false);
 
                                 if (this instanceof SolidBucketItem) {
+                                    ((ServerPlayer) entityhuman).connection.send(new net.minecraft.network.protocol.game.ClientboundBlockUpdatePacket(world, blockposition.below())); // Paper - update block below
                                     ((ServerPlayer) entityhuman).getBukkitEntity().updateInventory(); // SPIGOT-4541
                                 }
                                 return InteractionResult.FAIL;
diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 1bc9cb46e7ceb274bad7ca02b7bc834e96111f56..32e617461d603c3f8e968e82bb1d2e7e14b19aa2 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -346,7 +346,7 @@ public final class ItemStack {
             int oldCount = this.getCount();
             ServerLevel world = (ServerLevel) itemactioncontext.getLevel();
 
-            if (!(this.getItem() instanceof BucketItem || this.getItem() instanceof SolidBucketItem)) { // if not bucket
+            if (!(this.getItem() instanceof BucketItem/* || this.getItem() instanceof SolidBucketItem*/)) { // if not bucket // Paper - capture block states for snow buckets
                 world.captureBlockStates = true;
                 // special case bonemeal
                 if (this.getItem() == Items.BONE_MEAL) {
@@ -401,7 +401,7 @@ public final class ItemStack {
                 world.capturedBlockStates.clear();
                 if (blocks.size() > 1) {
                     placeEvent = org.bukkit.craftbukkit.event.CraftEventFactory.callBlockMultiPlaceEvent(world, entityhuman, enumhand, blocks, blockposition.getX(), blockposition.getY(), blockposition.getZ());
-                } else if (blocks.size() == 1) {
+                } else if (blocks.size() == 1 && item != Items.POWDER_SNOW_BUCKET) { // Paper - don't call event twice for snow buckets
                     placeEvent = org.bukkit.craftbukkit.event.CraftEventFactory.callBlockPlaceEvent(world, entityhuman, enumhand, blocks.get(0), blockposition.getX(), blockposition.getY(), blockposition.getZ());
                 }