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 175b965c92b8b8be9c671e1ee478afa9a2f7bf82..1fb809486ee56efd3d0ef3fa02503ba9be459f68 100644
--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
@@ -868,6 +868,7 @@ 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 5a86b2c205250ddcd833a15accb27ca4a580eadd..9b4e20d4bfba2de08084f1d69cb2ebfff7455c14 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -424,6 +424,7 @@ public final class ItemStack {
                     for (CraftBlockState blockstate : blocks) {
                         // SPIGOT-7572 - Move fix for SPIGOT-7248 to CapturedBlockState, to allow bees in bee nest
                         CapturedBlockState.setBlockState(blockstate);
+                        world.checkCapturedTreeStateForObserverNotify(blockposition, blockstate); // Paper - notify observers even if grow failed
                     }
                     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 4fe0f8ba4a2b089f44808063e72dd994d6c73e0a..6d98b910b1079f1b4a95c430e5500d55fbc68ec2 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -1372,4 +1372,14 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
         return range <= 0 ? 64.0 * 64.0 : range * range; // 64 is taken from default in ServerLevel#levelEvent
     }
     // Paper end - respect global sound events gamerule
+    // Paper start - notify observers even if grow failed
+    public void checkCapturedTreeStateForObserverNotify(final BlockPos pos, final CraftBlockState craftBlockState) {
+        // notify observers if the block state is the same and the Y level equals the original y level (for mega trees)
+        // blocks at the same Y level with the same state can be assumed to be saplings which trigger observers regardless of if the
+        // tree grew or not
+        if (craftBlockState.getPosition().getY() == pos.getY() && this.getBlockState(craftBlockState.getPosition()) == craftBlockState.getHandle()) {
+            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 83e6e3286d04c39d6d7ba496251aec962621f72e..3ff0d08e4964aae82d8e51d3b8bf9aa002096f81 100644
--- a/src/main/java/net/minecraft/world/level/block/SaplingBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/SaplingBlock.java
@@ -86,6 +86,7 @@ public class SaplingBlock extends BushBlock implements BonemealableBlock {
                     if (event == null || !event.isCancelled()) {
                         for (BlockState blockstate : blocks) {
                             CapturedBlockState.setBlockState(blockstate);
+                            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 0a96b00a98227714ef99005e0a223765feae8fe9..e5506a7d074a9f89d41f4d5d7549a458779bef20 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
@@ -566,6 +566,7 @@ 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
                 }
             }
         }