PaperMC/nms-patches/EntityArmorStand.patch

--- a/net/minecraft/server/EntityArmorStand.java
+++ b/net/minecraft/server/EntityArmorStand.java
@@ -4,6 +4,15 @@
 import java.util.Arrays;
 import java.util.List;
 
+// CraftBukkit start
+import org.bukkit.inventory.EquipmentSlot;
+import org.bukkit.craftbukkit.CraftEquipmentSlot;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.entity.ArmorStand;
+import org.bukkit.entity.Player;
+import org.bukkit.event.player.PlayerArmorStandManipulateEvent;
+// CraftBukkit end
+
 public class EntityArmorStand extends EntityLiving {
 
     private static final Vector3f bp = new Vector3f(0.0F, 0.0F, 0.0F);
@@ -360,6 +369,21 @@
         if (itemstack1 == null || (this.bz & 1 << enumitemslot.c() + 8) == 0) {
             if (itemstack1 != null || (this.bz & 1 << enumitemslot.c() + 16) == 0) {
                 ItemStack itemstack2;
+                // CraftBukkit start
+                org.bukkit.inventory.ItemStack armorStandItem = CraftItemStack.asCraftMirror(itemstack1);
+                org.bukkit.inventory.ItemStack playerHeldItem = CraftItemStack.asCraftMirror(itemstack);
+
+                Player player = (Player) entityhuman.getBukkitEntity();
+                ArmorStand self = (ArmorStand) this.getBukkitEntity();
+
+                EquipmentSlot slot = CraftEquipmentSlot.getSlot(enumitemslot);
+                PlayerArmorStandManipulateEvent armorStandManipulateEvent = new PlayerArmorStandManipulateEvent(player,self,playerHeldItem,armorStandItem,slot);
+                this.world.getServer().getPluginManager().callEvent(armorStandManipulateEvent);
+
+                if (armorStandManipulateEvent.isCancelled()) {
+                    return;
+                }
+                // CraftBukkit end
 
                 if (entityhuman.abilities.canInstantlyBuild && (itemstack1 == null || itemstack1.getItem() == Item.getItemOf(Blocks.AIR)) && itemstack != null) {
                     itemstack2 = itemstack.cloneItemStack();
@@ -381,6 +405,11 @@
     }
 
     public boolean damageEntity(DamageSource damagesource, float f) {
+        // CraftBukkit start
+        if (org.bukkit.craftbukkit.event.CraftEventFactory.handleNonLivingEntityDamageEvent(this, damagesource, f)) {
+            return false;
+        }
+        // CraftBukkit end
         if (!this.world.isClientSide && !this.dead) {
             if (DamageSource.OUT_OF_WORLD.equals(damagesource)) {
                 this.die();