From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 21 Aug 2021 18:53:03 -0700
Subject: [PATCH] Only capture actual tree growth


diff --git a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
index e9b748a81ec223a701b56d2dc890c9eb223d8474..a0c7c6208314d981e8577ad69ef1c5193290a085 100644
--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
@@ -862,6 +862,7 @@ public interface DispenseItemBehavior {
                     if (!fertilizeEvent.isCancelled()) {
                         for (org.bukkit.block.BlockState blockstate : blocks) {
                             blockstate.update(true);
+                            worldserver.checkCapturedTreeStateForObserverNotify(blockposition, (org.bukkit.craftbukkit.block.CraftBlockState) blockstate); // Paper - notify observers even if grow failed
                         }
                     }
                 }
diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 21b3be35da5636fa726f36f569142de5d16ac1f3..4697df75fdee2023c41260bed211e3e3d90d2b9b 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -401,6 +401,7 @@ public final class ItemStack {
                     }
                     for (CraftBlockState blockstate : blocks) {
                         world.setBlock(blockstate.getPosition(),blockstate.getHandle(), blockstate.getFlag()); // SPIGOT-7248 - manual update to avoid physics where appropriate
+                        world.checkCapturedTreeStateForObserverNotify(blockposition, blockstate); // Paper - notify observers even if grow failed
                         if (blockstate instanceof org.bukkit.craftbukkit.block.CapturedBlockState capturedBlockState) capturedBlockState.checkTreeBlockHack(); // Paper
                     }
                     entityhuman.awardStat(Stats.ITEM_USED.get(item)); // SPIGOT-7236 - award stat
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 169fc7b1aaf2cefec3ddab53fcec912e0ec0117a..f2f93761985a78b563dd1eda57f9a08b1cc8893a 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -1868,4 +1868,11 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
         return null;
     }
     // Paper end - optimize redstone (Alternate Current)
+    // Paper start - notify observers even if grow failed
+    public void checkCapturedTreeStateForObserverNotify(final BlockPos pos, final CraftBlockState craftBlockState) {
+        if (craftBlockState.getPosition().getY() == pos.getY() && this.getBlockState(craftBlockState.getPosition()) == craftBlockState.getHandle()) { // notify observers if the block state is the same and the Y level equals the original y level (for mega trees)
+            this.notifyAndUpdatePhysics(craftBlockState.getPosition(), null, craftBlockState.getHandle(), craftBlockState.getHandle(), craftBlockState.getHandle(), craftBlockState.getFlag(), 512);
+        }
+    }
+    // Paper end - notify observers even if grow failed
 }
diff --git a/src/main/java/net/minecraft/world/level/block/SaplingBlock.java b/src/main/java/net/minecraft/world/level/block/SaplingBlock.java
index f43e6fe77e943239c1f1d6fa3e31235949f79546..53ac4e618fec3fe384d8a106c521f3eace0b5b35 100644
--- a/src/main/java/net/minecraft/world/level/block/SaplingBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/SaplingBlock.java
@@ -73,6 +73,7 @@ public class SaplingBlock extends BushBlock implements BonemealableBlock {
                     if (event == null || !event.isCancelled()) {
                         for (BlockState blockstate : blocks) {
                             blockstate.update(true);
+                            world.checkCapturedTreeStateForObserverNotify(pos, (org.bukkit.craftbukkit.block.CraftBlockState) blockstate); // Paper - notify observers even if grow failed
                         }
                     }
                 }
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
index 11cc7e640774c6098c247382da8520d62ba19c32..bec8e6b62dba2bd0e4e85a7d1fb51287384f1290 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
@@ -565,6 +565,7 @@ public class CraftBlock implements Block {
             if (!event.isCancelled()) {
                 for (BlockState blockstate : blocks) {
                     blockstate.update(true);
+                    world.checkCapturedTreeStateForObserverNotify(this.position, (org.bukkit.craftbukkit.block.CraftBlockState) blockstate); // Paper - notify observers even if grow failed
                 }
             }
         }