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component.rs
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component.rs
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/// 组件
use std::{any::{TypeId, type_name}, ops::Index, ops::IndexMut};
use std::collections::hash_map::Entry;
use pi_map::{Map, vecmap::VecMap};
use pi_share::cell::TrustCell;
use pi_hash::XHashMap;
use pi_any::ArcAny;
use thiserror::Error;
use pi_share::ThreadSync;
use crate::{
storage::{LocalVersion, Local, Offset, SecondaryMap},
monitor::{Notify, NotifyImpl, Listener}, entity::Entity,
};
pub trait ComponentStorage {
type Type: Map<Key = LocalVersion, Val = Self> + Index<LocalVersion, Output=Self> + IndexMut<LocalVersion, Output=Self> + ThreadSync + 'static;
}
pub trait Component: ThreadSync + 'static {
type Storage: Map<Key = LocalVersion, Val = Self> + Index<LocalVersion, Output=Self> + IndexMut<LocalVersion, Output=Self> + ThreadSync + 'static;
}
impl<C> Component for C where C: ThreadSync + 'static {
default type Storage = SecondaryMap<LocalVersion, Self>;
}
impl<C> Component for C where C: ComponentStorage + ThreadSync + 'static{
type Storage = <C as ComponentStorage>::Type;
}
pub trait MultiCase: ArcAny {
fn delete(&self, id: LocalVersion);
}
pub type CellMultiCase<C> = TrustCell<MultiCaseImpl<C>>;
pub struct MultiCaseImpl<C: Component> {
map: C::Storage,
notify: NotifyImpl,
archetype_id: Local,
ticks: VecMap<ComponentTicks>,
}
unsafe impl<C: Component> Send for MultiCaseImpl<C> {}
unsafe impl<C: Component> Sync for MultiCaseImpl<C> {}
impl<C: Component> MultiCaseImpl<C> {
pub fn get_storage(&self) -> &C::Storage {
&self.map
}
pub fn get_storage_mut(&mut self) -> &mut C::Storage {
&mut self.map
}
}
impl<C: Component> Index<LocalVersion> for MultiCaseImpl<C> {
type Output = C;
fn index(&self, index: LocalVersion) -> &C {
&self.map[index]
}
}
impl<C: Component> IndexMut<LocalVersion> for MultiCaseImpl<C> {
fn index_mut(&mut self, index: LocalVersion) -> &mut C {
&mut self.map[index]
}
}
impl< C: Component> MultiCaseImpl<C> {
pub fn with_capacity(capacity: usize, archetype_id: Local) -> Self {
MultiCaseImpl {
map: C::Storage::with_capacity(capacity),
notify: NotifyImpl::default(),
archetype_id,
ticks: VecMap::default(),
}
}
// pub fn mem_size(&self) -> usize {
// self.map.mem_size() + self.notify.mem_size()
// }
pub fn get(&self, id: LocalVersion) -> Option<&C> {
self.map.get(&id)
}
pub fn get_mut(&mut self, id: LocalVersion) -> Option<&mut C> {
self.map.get_mut(&id)
}
pub unsafe fn get_unchecked(&self, id: LocalVersion) -> &C {
self.map.get_unchecked(&id)
}
pub unsafe fn get_unchecked_mut(&mut self, id: LocalVersion) -> &mut C {
self.map.get_unchecked_mut(&id)
}
pub fn insert(&mut self, id: LocalVersion, c: C, tick: u32) -> Option<C> {
let r = self.map.insert(id, c);
match r {
Some(_) => {
self.ticks[id.offset()].changed = tick;
self.notify.modify_event(Entity::new(self.archetype_id, id), "", 0)
}
_ => {
self.ticks.insert(id.offset(), ComponentTicks::new(tick));
self.notify.create_event(Entity::new(self.archetype_id, id));
}
}
r
}
// 通知修改
pub fn notify_modify(&mut self, id: LocalVersion, tick: u32) {
self.ticks[id.offset()].changed = tick;
self.notify.modify_event(Entity::new(self.archetype_id, id), "", 0)
}
pub fn notify_delete(&mut self, id: LocalVersion, tick: u32) {
self.ticks[id.offset()].changed = tick;
self.notify.delete_event(Entity::new(self.archetype_id, id))
}
pub fn tick(&self, id: LocalVersion) -> Option<&ComponentTicks> {
self.ticks.get(id.offset())
}
pub fn tick_uncehcked(&self, id: LocalVersion) -> &ComponentTicks {
&self.ticks[id.offset()]
}
pub fn insert_no_notify(&mut self, id: LocalVersion, c: C, tick: u32) -> Option<C> {
let r = self.map.insert(id, c);
match r {
Some(_) => {
self.ticks[id.offset()].changed = tick;
},
_ => {self.ticks.insert(id.offset(), ComponentTicks::new(tick));},
};
r
}
pub fn delete(&mut self, id: LocalVersion) -> Option<C> {
if self.map.get(&id).is_some() {
self.notify.delete_event(Entity::new( self.archetype_id, id));
self.map.remove(&id)
} else {
None
}
}
pub fn get_notify(&self) -> NotifyImpl {
self.notify.clone()
}
pub fn get_notify_ref(&self) -> &NotifyImpl {
&self.notify
}
pub fn contains_key(&self, local: &LocalVersion) -> bool {
self.map.contains(local)
}
}
impl_downcast_arc!(MultiCase);
impl<C: Component> MultiCase for CellMultiCase<C> {
fn delete(&self, id: LocalVersion) {
// 实体删除,组件不再监听删除事件
self.borrow_mut().map.remove(&id);
}
}
impl<C: Component> Notify for CellMultiCase<C>{
fn add_create(&self, listener: Listener) {
self.borrow_mut().notify.add_create(listener);
}
fn add_delete(&self, listener: Listener) {
self.borrow_mut().notify.add_delete(listener)
}
fn add_modify(&self, listener: Listener) {
self.borrow_mut().notify.add_modify(listener)
}
fn create_event(&self, id: Entity) {
self.borrow().notify.create_event(id);
}
fn delete_event(&self, id: Entity) {
self.borrow().notify.delete_event(id);
}
fn modify_event(&self, id: Entity, field: &'static str, index: usize) {
self.borrow().notify.modify_event(id, field, index);
}
fn remove_create(&self, listener: &Listener) {
self.borrow_mut().notify.remove_create(listener);
}
fn remove_delete(&self, listener: &Listener) {
self.borrow_mut().notify.remove_delete(listener);
}
fn remove_modify(&self, listener: &Listener) {
self.borrow_mut().notify.remove_modify(listener);
}
}
pub type ComponentId = Local;
pub struct ComponentInfo {
pub(crate) storage_type: StorageType,
pub(crate) id: ComponentId,
pub(crate) name: &'static str,
}
impl ComponentInfo {
pub fn storage_type(&self) -> StorageType {
self.storage_type
}
pub fn id(&self) -> ComponentId {
self.id
}
pub fn name(&self) -> &'static str {
self.name
}
}
pub struct Components {
pub(crate) infos: Vec<ComponentInfo>,
pub(crate) indices: XHashMap<TypeId, usize>,
pub(crate) resource_indices: XHashMap<TypeId, ComponentId>,
}
#[derive(Debug, Error)]
pub enum ComponentsError {
#[error("A component of type {name:?} ({type_id:?}) already exists")]
ComponentAlreadyExists { type_id: TypeId, name: String },
}
impl Components {
pub fn new() -> Self {
Self {
infos: Vec::new(),
indices: XHashMap::default(),
resource_indices: XHashMap::default(),
}
}
#[inline]
pub(crate) fn get_or_insert_resource_id<T: Component>(&mut self) -> ComponentId {
match self.resource_indices.entry(TypeId::of::<T>()) {
Entry::Occupied(r) => *r.get(),
Entry::Vacant(r) => {
let index = self.infos.len();
let index = ComponentId::new(index);
self.infos.push(ComponentInfo{
id: index,
storage_type: StorageType::Table,
name: type_name::<T>(),
});
r.insert(index);
index
}
}
}
pub(crate) fn get_resource_id<T: Component>(&self) -> Option<&ComponentId> {
self.resource_indices.get(&TypeId::of::<T>())
}
#[inline]
pub fn get_or_insert_id<T: Component>(&mut self) -> ComponentId {
self.get_or_insert_with(TypeId::of::<T>(), std::any::type_name::<T>())
}
#[inline]
pub fn get_or_insert_info<T: Component>(&mut self) -> &ComponentInfo {
let id = self.get_or_insert_id::<T>();
// SAFE: component_info with the given `id` initialized above
unsafe { self.get_info_unchecked(id) }
}
#[inline]
pub fn len(&self) -> usize {
self.infos.len()
}
#[inline]
pub fn is_empty(&self) -> bool {
self.infos.len() == 0
}
#[inline]
pub fn get_info(&self, id: ComponentId) -> Option<&ComponentInfo> {
self.infos.get(*id)
}
/// # Safety
/// `id` must be a valid [ComponentId]
#[inline]
pub unsafe fn get_info_unchecked(&self, id: ComponentId) -> &ComponentInfo {
debug_assert!(id.offset() < self.infos.len());
self.infos.get_unchecked(*id)
}
#[inline]
pub fn get_id(&self, type_id: TypeId) -> Option<ComponentId> {
self.indices.get(&type_id).map(|index| ComponentId::new(*index))
}
#[inline]
pub(crate) fn get_or_insert_with(
&mut self,
type_id: TypeId,
name: &'static str,
) -> ComponentId {
let components = &mut self.infos;
let index = self.indices.entry(type_id).or_insert_with(|| {
let index = components.len();
components.push(ComponentInfo{
id: ComponentId::new(index),
storage_type: StorageType::Table,
name,
});
index
});
ComponentId::new(*index)
}
}
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
pub enum StorageType {
Table,
SparseSet,
}
impl Default for StorageType {
fn default() -> Self {
StorageType::Table
}
}
#[derive(Copy, Clone, Debug)]
pub struct ComponentTicks {
pub(crate) added: u32,
pub(crate) changed: u32,
}
impl ComponentTicks {
/// 是否为新增组件
#[inline]
pub fn is_added(&self, last_change_tick: u32, change_tick: u32) -> bool {
// The comparison is relative to `change_tick` so that we can detect changes over the whole
// `u32` range. Comparing directly the ticks would limit to half that due to overflow
// handling.
let component_delta = change_tick.wrapping_sub(self.added);
let system_delta = change_tick.wrapping_sub(last_change_tick);
component_delta < system_delta
}
/// 是否新增或修改
#[inline]
pub fn is_changed(&self, last_change_tick: u32, change_tick: u32) -> bool {
let component_delta = change_tick.wrapping_sub(self.changed);
let system_delta = change_tick.wrapping_sub(last_change_tick);
let component_delta1 = change_tick.wrapping_sub(self.added);
let system_delta1 = change_tick.wrapping_sub(last_change_tick);
component_delta < system_delta || component_delta1 < system_delta1
}
/// 是否修改
#[inline]
pub fn is_modifyed(&self, last_change_tick: u32, change_tick: u32) -> bool {
let component_delta = change_tick.wrapping_sub(self.changed);
let system_delta = change_tick.wrapping_sub(last_change_tick);
component_delta < system_delta
}
/// todo
#[inline]
pub fn is_deleted(&self, _last_change_tick: u32, _change_tick: u32) -> bool {
true
}
pub(crate) fn new(change_tick: u32) -> Self {
Self {
added: change_tick,
changed: 0,
}
}
#[allow(dead_code)]
pub(crate) fn check_ticks(&mut self, _change_tick: u32) {
// check_tick(&mut self.added, change_tick);
// check_tick(&mut self.changed, change_tick);
}
/// Manually sets the change tick.
/// Usually, this is done automatically via the [`DerefMut`](std::ops::DerefMut) implementation on [`Mut`](crate::world::Mut) or [`ResMut`](crate::system::ResMut) etc.
///
/// # Example
/// ```rust,no_run
/// # use bevy_ecs::{world::World, component::ComponentTicks};
/// let world: World = unimplemented!();
/// let component_ticks: ComponentTicks = unimplemented!();
///
/// component_ticks.set_changed(world.read_change_tick());
/// ```
#[inline]
pub fn set_changed(&mut self, change_tick: u32) {
self.changed = change_tick;
}
}