PaperMC/paper-server/patches/sources/net/minecraft/world/item/HangingEntityItem.java.patch

--- a/net/minecraft/world/item/HangingEntityItem.java
+++ b/net/minecraft/world/item/HangingEntityItem.java
@@ -19,12 +19,16 @@
 import net.minecraft.world.entity.decoration.ItemFrame;
 import net.minecraft.world.entity.decoration.Painting;
 import net.minecraft.world.entity.decoration.PaintingVariant;
-import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.component.CustomData;
 import net.minecraft.world.item.context.UseOnContext;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.gameevent.GameEvent;
 
+// CraftBukkit start
+import org.bukkit.entity.Player;
+import org.bukkit.event.hanging.HangingPlaceEvent;
+// CraftBukkit end
+
 public class HangingEntityItem extends Item {
 
     private static final Component TOOLTIP_RANDOM_VARIANT = Component.translatable("painting.random").withStyle(ChatFormatting.GRAY);
@@ -40,7 +44,7 @@
         BlockPos blockposition = context.getClickedPos();
         Direction enumdirection = context.getClickedFace();
         BlockPos blockposition1 = blockposition.relative(enumdirection);
-        Player entityhuman = context.getPlayer();
+        net.minecraft.world.entity.player.Player entityhuman = context.getPlayer();
         ItemStack itemstack = context.getItemInHand();
 
         if (entityhuman != null && !this.mayPlace(entityhuman, enumdirection, itemstack, blockposition1)) {
@@ -75,6 +79,19 @@
 
             if (((HangingEntity) object).survives()) {
                 if (!world.isClientSide) {
+                    // CraftBukkit start - fire HangingPlaceEvent
+                    Player who = (context.getPlayer() == null) ? null : (Player) context.getPlayer().getBukkitEntity();
+                    org.bukkit.block.Block blockClicked = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+                    org.bukkit.block.BlockFace blockFace = org.bukkit.craftbukkit.block.CraftBlock.notchToBlockFace(enumdirection);
+                    org.bukkit.inventory.EquipmentSlot hand = org.bukkit.craftbukkit.CraftEquipmentSlot.getHand(context.getHand());
+
+                    HangingPlaceEvent event = new HangingPlaceEvent((org.bukkit.entity.Hanging) ((HangingEntity) object).getBukkitEntity(), who, blockClicked, blockFace, hand, org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(itemstack));
+                    world.getCraftServer().getPluginManager().callEvent(event);
+
+                    if (event.isCancelled()) {
+                        return InteractionResult.FAIL;
+                    }
+                    // CraftBukkit end
                     ((HangingEntity) object).playPlacementSound();
                     world.gameEvent((Entity) entityhuman, (Holder) GameEvent.ENTITY_PLACE, ((HangingEntity) object).position());
                     world.addFreshEntity((Entity) object);
@@ -88,7 +105,7 @@
         }
     }
 
-    protected boolean mayPlace(Player player, Direction side, ItemStack stack, BlockPos pos) {
+    protected boolean mayPlace(net.minecraft.world.entity.player.Player player, Direction side, ItemStack stack, BlockPos pos) {
         return !side.getAxis().isVertical() && player.mayUseItemAt(pos, side, stack);
     }
 
@@ -102,7 +119,7 @@
 
             if (!customdata.isEmpty()) {
                 customdata.read(holderlookup_a.createSerializationContext(NbtOps.INSTANCE), Painting.VARIANT_MAP_CODEC).result().ifPresentOrElse((holder) -> {
-                    Optional optional = ((PaintingVariant) holder.value()).title();
+                    Optional<Component> optional = ((PaintingVariant) holder.value()).title(); // CraftBukkit - decompile error
 
                     Objects.requireNonNull(tooltip);
                     optional.ifPresent(tooltip::add);