feat: add Anvil

pumpkin-data/src/data_component_impl.rs

@@ -225,10 +225,18 @@ impl DataComponentImpl for UnbreakableImpl {
 }
 #[derive(Clone, Hash, PartialEq, Eq)]
 pub struct CustomNameImpl {
-    // TODO make TextComponent const
-    pub name: &'static str,
+    // TODO make TextComponent
+    pub name: String,
 }
 impl DataComponentImpl for CustomNameImpl {
+    fn write_data(&self) -> NbtTag {
+        NbtTag::String(self.name.clone())
+    }
+
+    fn get_hash(&self) -> i32 {
+        get_str_hash(self.name.as_str()) as i32
+    }
+
     default_impl!(CustomName);
 }
 #[derive(Clone, Hash, PartialEq, Eq)]

pumpkin-data/src/item_stack/mod.rs

@@ -288,6 +288,20 @@ impl ItemStack {
         self.item_count == 0 || self.item.id == Item::AIR.id
     }
 
+    pub fn set_custom_name(&mut self, name: String) {
+        use crate::data_component_impl::CustomNameImpl;
+        let component = Some(CustomNameImpl { name }.to_dyn());
+        if let Some(pos) = self
+            .patch
+            .iter()
+            .position(|(id, _)| *id == DataComponent::CustomName)
+        {
+            self.patch[pos].1 = component;
+        } else {
+            self.patch.push((DataComponent::CustomName, component));
+        }
+    }
+
     #[must_use]
     pub fn split(&mut self, amount: u8) -> Self {
         let min = amount.min(self.item_count);

pumpkin-inventory/src/anvil/anvil_screen_handler.rs

@@ -0,0 +1,231 @@
+use std::any::Any;
+use std::sync::Arc;
+
+use pumpkin_data::{item_stack::ItemStack, screen::WindowType};
+use pumpkin_world::inventory::Inventory;
+
+use crate::{
+    player::player_inventory::PlayerInventory,
+    screen_handler::{
+        InventoryPlayer, ItemStackFuture, ScreenHandler, ScreenHandlerBehaviour,
+        ScreenHandlerFuture,
+    },
+    slot::NormalSlot,
+    window_property::{Anvil, WindowProperty},
+};
+
+pub struct AnvilScreenHandler {
+    pub inventory: Arc<dyn Inventory>,
+    behaviour: ScreenHandlerBehaviour,
+    pub rename_text: String,
+    pub repair_cost: i16,
+}
+
+impl AnvilScreenHandler {
+    #[expect(clippy::needless_pass_by_value)]
+    pub fn new(
+        sync_id: u8,
+        player_inventory: &Arc<PlayerInventory>,
+        inventory: Arc<dyn Inventory>,
+    ) -> Self {
+        let mut handler = Self {
+            inventory: inventory.clone(),
+            behaviour: ScreenHandlerBehaviour::new(sync_id, Some(WindowType::Anvil)),
+            rename_text: String::new(),
+            repair_cost: 0,
+        };
+
+        // Anvil specific slots: 2 input, 1 output
+        for i in 0..3 {
+            handler.add_slot(Arc::new(NormalSlot::new(inventory.clone(), i)));
+        }
+
+        let player_inventory: Arc<dyn Inventory> = player_inventory.clone();
+        handler.add_player_slots(&player_inventory);
+
+        handler
+    }
+
+    pub async fn update_item_name(&mut self, name: String) {
+        self.rename_text = name;
+        self.update_result_slot().await;
+        self.send_content_updates().await;
+    }
+
+    pub async fn update_result_slot(&mut self) {
+        let input_a = {
+            let lock = self.inventory.get_stack(0).await;
+            lock.lock().await.clone()
+        };
+
+        if input_a.is_empty() {
+            self.inventory.set_stack(2, ItemStack::EMPTY.clone()).await;
+            self.set_repair_cost(0).await;
+            return;
+        }
+
+        let mut result_item = input_a.clone();
+        let mut cost = 0;
+
+        // Basic renaming logic for now
+        if !self.rename_text.is_empty() {
+            result_item.set_custom_name(self.rename_text.clone());
+            cost += 1;
+        }
+
+        // If combining with another item... we'll skip complex anvil logic for now
+        // and just support renaming.
+        if cost > 0 {
+            self.inventory.set_stack(2, result_item).await;
+            self.set_repair_cost(cost).await;
+        } else {
+            self.inventory.set_stack(2, ItemStack::EMPTY.clone()).await;
+            self.set_repair_cost(0).await;
+        }
+    }
+
+    pub async fn set_repair_cost(&mut self, cost: i16) {
+        self.repair_cost = cost;
+        if let Some(sync_handler) = self.behaviour.sync_handler.as_ref() {
+            let (property_id, property_value) =
+                WindowProperty::new(Anvil::RepairCost, cost).into_tuple();
+            sync_handler
+                .update_property(&self.behaviour, property_id as i32, property_value as i32)
+                .await;
+        }
+    }
+}
+
+impl ScreenHandler for AnvilScreenHandler {
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+
+    fn as_any_mut(&mut self) -> &mut dyn Any {
+        self
+    }
+
+    fn get_behaviour(&self) -> &ScreenHandlerBehaviour {
+        &self.behaviour
+    }
+
+    fn get_behaviour_mut(&mut self) -> &mut ScreenHandlerBehaviour {
+        &mut self.behaviour
+    }
+
+    fn on_closed<'a>(&'a mut self, player: &'a dyn InventoryPlayer) -> ScreenHandlerFuture<'a, ()> {
+        Box::pin(async move {
+            self.default_on_closed(player).await;
+            self.inventory.on_close().await;
+            // Drop inputs from anvil
+            for i in 0..2 {
+                let stack = self.inventory.remove_stack(i).await;
+                if !stack.is_empty() {
+                    player.drop_item(stack, false).await;
+                }
+            }
+            self.inventory.set_stack(2, ItemStack::EMPTY.clone()).await;
+        })
+    }
+
+    fn quick_move<'a>(
+        &'a mut self,
+        _player: &'a dyn InventoryPlayer,
+        slot_index: i32,
+    ) -> ItemStackFuture<'a> {
+        Box::pin(async move {
+            let mut stack_left = ItemStack::EMPTY.clone();
+            let slot = self.get_behaviour().slots[slot_index as usize].clone();
+
+            if slot.has_stack().await {
+                let slot_stack_lock = slot.get_stack().await;
+                let slot_stack_guard = slot_stack_lock.lock().await;
+                stack_left = slot_stack_guard.clone();
+                drop(slot_stack_guard);
+
+                let mut slot_stack_mut = slot_stack_lock.lock().await;
+
+                if slot_index < 3 {
+                    // From anvil to player
+                    if !self
+                        .insert_item(
+                            &mut slot_stack_mut,
+                            3,
+                            self.get_behaviour().slots.len() as i32,
+                            true,
+                        )
+                        .await
+                    {
+                        return ItemStack::EMPTY.clone();
+                    }
+                } else {
+                    // From player to anvil input 0 and 1
+                    if !self.insert_item(&mut slot_stack_mut, 0, 2, false).await {
+                        return ItemStack::EMPTY.clone();
+                    }
+                }
+
+                if slot_stack_mut.is_empty() {
+                    drop(slot_stack_mut);
+                    slot.set_stack(ItemStack::EMPTY.clone()).await;
+                } else {
+                    drop(slot_stack_mut);
+                    slot.mark_dirty().await;
+                }
+            }
+
+            stack_left
+        })
+    }
+
+    fn on_slot_click<'a>(
+        &'a mut self,
+        slot_index: i32,
+        button: i32,
+        action_type: pumpkin_protocol::java::server::play::SlotActionType,
+        player: &'a dyn InventoryPlayer,
+    ) -> ScreenHandlerFuture<'a, ()> {
+        Box::pin(async move {
+            if slot_index == 2 {
+                // Taking from output slot
+                let result_slot = self.get_behaviour().slots[2].clone();
+                if result_slot.has_stack().await {
+                    let result_stack = result_slot.get_cloned_stack().await;
+                    if !result_stack.is_empty() {
+                        if player.experience_level() >= self.repair_cost as i32
+                            || player.is_creative()
+                        {
+                            // Consume experience
+                            if !player.is_creative() {
+                                player
+                                    .add_experience_levels(-(self.repair_cost as i32))
+                                    .await;
+                            }
+
+                            // Consume inputs
+                            let input_a = self.inventory.get_stack(0).await;
+                            let mut input_a = input_a.lock().await;
+                            input_a.decrement(1); // Usually consumes 1
+                            if input_a.is_empty() {
+                                *input_a = ItemStack::EMPTY.clone();
+                            }
+                            drop(input_a);
+                            self.get_behaviour().slots[0].mark_dirty().await;
+                        } else {
+                            // Cancel click
+                            self.send_content_updates().await;
+                            return;
+                        }
+                    }
+                }
+            }
+
+            self.internal_on_slot_click(slot_index, button, action_type, player)
+                .await;
+            if slot_index == 0 || slot_index == 1 || slot_index == 2 {
+                self.update_result_slot().await;
+                self.send_content_updates().await;
+            }
+        })
+    }
+}

pumpkin-inventory/src/anvil/mod.rs

@@ -0,0 +1,3 @@
+pub mod anvil_screen_handler;
+
+pub use anvil_screen_handler::*;

pumpkin-inventory/src/lib.rs

@@ -30,6 +30,7 @@
 //! [`PlayerInventory`]: PlayerInventory
 //! [`SyncHandler`]: sync_handler::SyncHandler
 
+pub mod anvil;
 pub mod brewing;
 pub mod container_click;
 pub mod crafting;

pumpkin-inventory/src/screen_handler.rs

@@ -133,6 +133,15 @@ pub trait InventoryPlayer: Send + Sync {
     /// Checks if the player has infinite materials (creative mode).
     fn has_infinite_materials(&self) -> bool;
 
+    /// Checks if the player is in creative mode.
+    fn is_creative(&self) -> bool;
+
+    /// Gets the player's experience level.
+    fn experience_level(&self) -> i32;
+
+    /// Adds or removes experience levels.
+    fn add_experience_levels(&self, levels: i32) -> PlayerFuture<'_, ()>;
+
     /// Sends a full container content packet.
     fn enqueue_inventory_packet<'a>(
         &'a self,

pumpkin-inventory/src/window_property.rs

@@ -108,6 +108,14 @@ pub enum Anvil {
     RepairCost,
 }
 
+impl WindowPropertyTrait for Anvil {
+    fn to_id(self) -> i16 {
+        match self {
+            Self::RepairCost => 0,
+        }
+    }
+}
+
 /// Brewing stand window properties.
 pub enum BrewingStand {
     /// Brewing progress (0-400).

pumpkin-protocol/src/codec/data_component.rs

@@ -4,7 +4,7 @@ use crate::codec::var_int::VarInt;
 use pumpkin_data::Enchantment;
 use pumpkin_data::data_component::DataComponent;
 use pumpkin_data::data_component_impl::{
-    ConsumableImpl, ConsumeAnimation, ConsumeEffect, DamageImpl, DataComponentImpl,
+    ConsumableImpl, ConsumeAnimation, ConsumeEffect, CustomNameImpl, DamageImpl, DataComponentImpl,
     EnchantmentsImpl, EquipmentSlot, EquippableImpl, FireworkExplosionImpl, FireworkExplosionShape,
     FireworksImpl, IDSet, IDSetContent, IdOr, ItemModelImpl, MaxStackSizeImpl, PotionContentsImpl,
     SoundEvent, StatusEffectInstance, StoredEnchantmentsImpl, UnbreakableImpl, get,
@@ -346,6 +346,19 @@ impl DataComponentCodec<Self> for ItemModelImpl {
     }
 }
 
+impl DataComponentCodec<Self> for CustomNameImpl {
+    fn serialize<T: SerializeStruct>(&self, seq: &mut T) -> Result<(), T::Error> {
+        seq.serialize_field::<String>("", &self.name)
+    }
+
+    fn deserialize<'a, A: SeqAccess<'a>>(seq: &mut A) -> Result<Self, A::Error> {
+        let name = seq
+            .next_element::<String>()?
+            .ok_or(de::Error::custom("No CustomNameImpl name string!"))?;
+        Ok(Self { name })
+    }
+}
+
 impl DataComponentCodec<Self> for ConsumableImpl {
     fn serialize<T: SerializeStruct>(&self, seq: &mut T) -> Result<(), T::Error> {
         seq.serialize_field::<f32>("", &self.consume_seconds)?;
@@ -820,6 +833,7 @@ pub fn deserialize<'a, A: SeqAccess<'a>>(
         DataComponent::FireworkExplosion => Ok(FireworkExplosionImpl::deserialize(seq)?.to_dyn()),
         DataComponent::Fireworks => Ok(FireworksImpl::deserialize(seq)?.to_dyn()),
         DataComponent::ItemModel => Ok(ItemModelImpl::deserialize(seq)?.to_dyn()),
+        DataComponent::CustomName => Ok(CustomNameImpl::deserialize(seq)?.to_dyn()),
         DataComponent::Consumable => Ok(ConsumableImpl::deserialize(seq)?.to_dyn()),
         DataComponent::Equippable => Ok(EquippableImpl::deserialize(seq)?.to_dyn()),
         DataComponent::StoredEnchantments => Ok(StoredEnchantmentsImpl::deserialize(seq)?.to_dyn()),
@@ -840,6 +854,7 @@ pub fn serialize<T: SerializeStruct>(
         DataComponent::FireworkExplosion => get::<FireworkExplosionImpl>(value).serialize(seq),
         DataComponent::Fireworks => get::<FireworksImpl>(value).serialize(seq),
         DataComponent::ItemModel => get::<ItemModelImpl>(value).serialize(seq),
+        DataComponent::CustomName => get::<CustomNameImpl>(value).serialize(seq),
         DataComponent::Consumable => get::<ConsumableImpl>(value).serialize(seq),
         DataComponent::Equippable => get::<EquippableImpl>(value).serialize(seq),
         DataComponent::StoredEnchantments => get::<StoredEnchantmentsImpl>(value).serialize(seq),

pumpkin-protocol/src/java/server/play/mod.rs

@@ -31,6 +31,7 @@ mod player_rotation;
 mod player_session;
 mod recipe_book_change_settings;
 mod recipe_book_seen_recipe;
+mod rename_item;
 mod select_trade;
 mod set_command_block;
 mod set_creative_slot;
@@ -73,6 +74,7 @@ pub use player_rotation::*;
 pub use player_session::*;
 pub use recipe_book_change_settings::*;
 pub use recipe_book_seen_recipe::*;
+pub use rename_item::*;
 pub use select_trade::*;
 pub use set_command_block::*;
 pub use set_creative_slot::*;

pumpkin-protocol/src/java/server/play/rename_item.rs

@@ -0,0 +1,9 @@
+use pumpkin_data::packet::serverbound::PLAY_RENAME_ITEM;
+use pumpkin_macros::java_packet;
+use serde::Deserialize;
+
+#[derive(Deserialize, Debug)]
+#[java_packet(PLAY_RENAME_ITEM)]
+pub struct SRenameItem {
+    pub item_name: String,
+}

pumpkin/src/block/blocks/anvil.rs

@@ -1,16 +1,44 @@
 use crate::block::blocks::falling::FallingBlock;
+use crate::block::registry::BlockActionResult;
 use crate::block::{
-    BlockBehaviour, BlockFuture, GetStateForNeighborUpdateArgs, OnPlaceArgs, OnScheduledTickArgs,
-    PlacedArgs,
+    BlockBehaviour, BlockFuture, GetStateForNeighborUpdateArgs, NormalUseArgs, OnPlaceArgs,
+    OnScheduledTickArgs, PlacedArgs,
 };
+
 use pumpkin_data::block_properties::{BlockProperties, WallTorchLikeProperties};
+use pumpkin_data::translation;
+use pumpkin_inventory::anvil::AnvilScreenHandler;
+use pumpkin_inventory::player::player_inventory::PlayerInventory;
+use pumpkin_inventory::screen_handler::{
+    BoxFuture, InventoryPlayer, ScreenHandlerFactory, SharedScreenHandler,
+};
 use pumpkin_macros::pumpkin_block_from_tag;
+use pumpkin_util::text::TextComponent;
 use pumpkin_world::BlockStateId;
+use pumpkin_world::inventory::SimpleInventory;
+use std::sync::Arc;
+use tokio::sync::Mutex;
 
 #[pumpkin_block_from_tag("minecraft:anvil")]
 pub struct AnvilBlock;
 
 impl BlockBehaviour for AnvilBlock {
+    fn normal_use<'a>(&'a self, args: NormalUseArgs<'a>) -> BlockFuture<'a, BlockActionResult> {
+        Box::pin(async move {
+            args.player
+                .open_handled_screen(&AnvilScreenFactory, Some(*args.position))
+                .await;
+
+            BlockActionResult::Success
+        })
+    }
+
+    fn placed<'a>(&'a self, args: PlacedArgs<'a>) -> BlockFuture<'a, ()> {
+        Box::pin(async move {
+            FallingBlock::placed(&FallingBlock, args).await;
+        })
+    }
+
     fn on_place<'a>(&'a self, args: OnPlaceArgs<'a>) -> BlockFuture<'a, BlockStateId> {
         Box::pin(async move {
             let dir = args
@@ -27,9 +55,9 @@ impl BlockBehaviour for AnvilBlock {
         })
     }
 
-    fn placed<'a>(&'a self, args: PlacedArgs<'a>) -> BlockFuture<'a, ()> {
+    fn on_scheduled_tick<'a>(&'a self, args: OnScheduledTickArgs<'a>) -> BlockFuture<'a, ()> {
         Box::pin(async move {
-            FallingBlock::placed(&FallingBlock, args).await;
+            FallingBlock::on_scheduled_tick(&FallingBlock, args).await;
         })
     }
 
@@ -41,9 +69,27 @@ impl BlockBehaviour for AnvilBlock {
             async move { FallingBlock::get_state_for_neighbor_update(&FallingBlock, args).await },
         )
     }
-    fn on_scheduled_tick<'a>(&'a self, args: OnScheduledTickArgs<'a>) -> BlockFuture<'a, ()> {
+}
+
+struct AnvilScreenFactory;
+
+impl ScreenHandlerFactory for AnvilScreenFactory {
+    fn create_screen_handler<'a>(
+        &'a self,
+        sync_id: u8,
+        player_inventory: &'a Arc<PlayerInventory>,
+        _player: &'a dyn InventoryPlayer,
+    ) -> BoxFuture<'a, Option<SharedScreenHandler>> {
         Box::pin(async move {
-            FallingBlock::on_scheduled_tick(&FallingBlock, args).await;
+            let inventory = Arc::new(SimpleInventory::new(3));
+            let handler = AnvilScreenHandler::new(sync_id, player_inventory, inventory);
+            let concrete_arc = Arc::new(Mutex::new(handler));
+
+            Some(concrete_arc as SharedScreenHandler)
         })
     }
+
+    fn get_display_name(&self) -> TextComponent {
+        TextComponent::translate(translation::CONTAINER_REPAIR, &[])
+    }
 }

pumpkin/src/entity/player.rs

@@ -64,7 +64,7 @@ use pumpkin_protocol::java::client::play::{
     CTitleAnimation, CTitleText, CUnloadChunk, CUpdateMobEffect, CUpdateTime, GameEvent, Metadata,
     PlayerAction, PlayerInfoFlags, PreviousMessage,
 };
-use pumpkin_protocol::java::server::play::{SClickSlot, SlotActionType};
+use pumpkin_protocol::java::server::play::{SClickSlot, SRenameItem, SlotActionType};
 use pumpkin_util::math::{
     boundingbox::BoundingBox, experience, position::BlockPos, vector2::Vector2, vector3::Vector3,
 };
@@ -2933,6 +2933,19 @@ impl Player {
             .await;
     }
 
+    pub async fn on_rename_item(self: &Arc<Self>, packet: SRenameItem) {
+        self.update_last_action_time();
+        let screen_handler_arc = self.current_screen_handler.lock().await.clone();
+        let mut screen_handler = screen_handler_arc.lock().await;
+
+        if let Some(anvil_handler) = screen_handler
+            .as_any_mut()
+            .downcast_mut::<pumpkin_inventory::anvil::AnvilScreenHandler>()
+        {
+            anvil_handler.update_item_name(packet.item_name).await;
+        }
+    }
+
     pub async fn open_handled_screen(
         &self,
         screen_handler_factory: &dyn ScreenHandlerFactory,
@@ -4060,6 +4073,21 @@ impl InventoryPlayer for Player {
         self.gamemode.load() == GameMode::Creative
     }
 
+    fn is_creative(&self) -> bool {
+        self.gamemode.load() == GameMode::Creative
+    }
+
+    fn experience_level(&self) -> i32 {
+        self.experience_level
+            .load(std::sync::atomic::Ordering::Relaxed)
+    }
+
+    fn add_experience_levels(&self, levels: i32) -> PlayerFuture<'_, ()> {
+        Box::pin(async move {
+            self.add_experience_levels(levels).await;
+        })
+    }
+
     fn get_inventory(&self) -> Arc<PlayerInventory> {
         self.inventory.clone()
     }

pumpkin/src/item/items/name_tag.rs

@@ -30,7 +30,9 @@ impl ItemBehaviour for NameTagItem {
                 && let Some(name) = item.get_data_component::<CustomNameImpl>()
             {
                 // TODO
-                entity.set_custom_name(TextComponent::text(name.name)).await;
+                entity
+                    .set_custom_name(TextComponent::text(name.name.clone()))
+                    .await;
                 item.decrement_unless_creative(player.gamemode.load(), 1);
             }
         })

pumpkin/src/net/java/mod.rs

@@ -12,8 +12,8 @@ use pumpkin_protocol::java::server::play::{
     SPaddleBoat, SPickItemFromBlock, SPlaceRecipe, SPlayPingRequest, SPlayerAbilities,
     SPlayerAction, SPlayerCommand, SPlayerInput, SPlayerLoaded, SPlayerPosition,
     SPlayerPositionRotation, SPlayerRotation, SPlayerSession, SRecipeBookChangeSettings,
-    SRecipeBookSeenRecipe, SSelectTrade, SSetCommandBlock, SSetCreativeSlot, SSetHeldItem,
-    SSetPlayerGround, SSwingArm, SUpdateSign, SUseItem, SUseItemOn,
+    SRecipeBookSeenRecipe, SRenameItem, SSelectTrade, SSetCommandBlock, SSetCreativeSlot,
+    SSetHeldItem, SSetPlayerGround, SSwingArm, SUpdateSign, SUseItem, SUseItemOn,
 };
 use pumpkin_protocol::packet::MultiVersionJavaPacket;
 use pumpkin_protocol::{
@@ -887,6 +887,11 @@ impl JavaClient {
                 )
                 .await;
             }
+            id if id == SRenameItem::to_id(version) => {
+                player
+                    .on_rename_item(SRenameItem::read(payload, &version)?)
+                    .await;
+            }
             id if id == SPlaceRecipe::to_id(version) => {
                 self.handle_place_recipe(player, SPlaceRecipe::read(payload, &version)?)
                     .await;