Paper/patches/server/1019-Fix-silent-equipment-change-for-mobs.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>
Date: Thu, 31 Aug 2023 17:32:48 +0200
Subject: [PATCH] Fix silent equipment change for mobs


diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index bb29725ea06128fb2386c50d088316fea01c312c..d28c477171c1b6888a45175075017d960464b5cd 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -1060,13 +1060,20 @@ public abstract class Mob extends LivingEntity implements Targeting {
 
     @Override
     public void setItemSlot(EquipmentSlot slot, ItemStack stack) {
+        // Paper start
+        setItemSlot(slot, stack, false);
+    }
+
+    @Override
+    public void setItemSlot(EquipmentSlot slot, ItemStack stack, boolean silent) {
+        // Paper end
         this.verifyEquippedItem(stack);
         switch (slot.getType()) {
             case HAND:
-                this.onEquipItem(slot, (ItemStack) this.handItems.set(slot.getIndex(), stack), stack);
+                this.onEquipItem(slot, (ItemStack) this.handItems.set(slot.getIndex(), stack), stack, silent); // Paper
                 break;
             case ARMOR:
-                this.onEquipItem(slot, (ItemStack) this.armorItems.set(slot.getIndex(), stack), stack);
+                this.onEquipItem(slot, (ItemStack) this.armorItems.set(slot.getIndex(), stack), stack, silent); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java b/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java
index 8e9469fec42f7b6a132cf173f6f5a95777a29b3b..b319021b22c5dceba6199ed27814b2dcf47b8d50 100644
--- a/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java
+++ b/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java
@@ -250,8 +250,8 @@ public abstract class AbstractSkeleton extends Monster implements RangedAttackMo
     // Paper end
 
     @Override
-    public void setItemSlot(EquipmentSlot slot, ItemStack stack) {
-        super.setItemSlot(slot, stack);
+    public void setItemSlot(EquipmentSlot slot, ItemStack stack, boolean silent) { // Paper
+        super.setItemSlot(slot, stack, silent); // Paper
         if (!this.level().isClientSide) {
             this.reassessWeaponGoal();
         }
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 1746159398a2bee2a86d82d5be035d68c1c3261a..ce422c31385d9518e798c7a3456fad747b09ea61 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -1867,7 +1867,10 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
     // 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)
+        // 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);
         }
     }
diff --git a/src/test/java/io/papermc/paper/entity/EntitySetItemSlotSilentOverrideTest.java b/src/test/java/io/papermc/paper/entity/EntitySetItemSlotSilentOverrideTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..4845f24e291ed8d643e182f3d6c50746a6ca2ded
--- /dev/null
+++ b/src/test/java/io/papermc/paper/entity/EntitySetItemSlotSilentOverrideTest.java
@@ -0,0 +1,55 @@
+package io.papermc.paper.entity;
+
+import io.github.classgraph.ClassGraph;
+import io.github.classgraph.ClassInfo;
+import io.github.classgraph.MethodInfo;
+import io.github.classgraph.MethodInfoList;
+import io.github.classgraph.MethodParameterInfo;
+import io.github.classgraph.ScanResult;
+import java.util.ArrayList;
+import java.util.List;
+import org.bukkit.support.AbstractTestingBase;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import static org.junit.Assert.fail;
+
+@RunWith(Parameterized.class)
+public class EntitySetItemSlotSilentOverrideTest extends AbstractTestingBase {
+
+    @Parameterized.Parameter
+    public ClassInfo overridesSetItemSlot;
+
+    @Parameterized.Parameters(name = "{0}")
+    public static Iterable<ClassInfo> parameters() {
+        final List<ClassInfo> classInfo = new ArrayList<>();
+        try (ScanResult scanResult = new ClassGraph()
+            .enableClassInfo()
+            .enableMethodInfo()
+            .whitelistPackages("net.minecraft")
+            .scan()
+        ) {
+            for (final ClassInfo subclass : scanResult.getSubclasses("net.minecraft.world.entity.LivingEntity")) {
+                final MethodInfoList setItemSlot = subclass.getDeclaredMethodInfo("setItemSlot");
+                if (!setItemSlot.isEmpty()) {
+                    classInfo.add(subclass);
+                }
+            }
+        }
+        return classInfo;
+    }
+
+    @Test
+    public void checkSetItemSlotSilentOverrides() {
+        final MethodInfoList setItemSlot = this.overridesSetItemSlot.getDeclaredMethodInfo("setItemSlot");
+        for (final MethodInfo methodInfo : setItemSlot) {
+            for (final MethodParameterInfo methodParameterInfo : methodInfo.getParameterInfo()) {
+                if ("boolean".equals(methodParameterInfo.getTypeDescriptor().toStringWithSimpleNames())) {
+                    return;
+                }
+            }
+        }
+        fail(this.overridesSetItemSlot.getName() + " needs to override setItemSlot with the boolean silent parameter as well");
+    }
+}