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Use World helper methods for sending HierarchyEvents (#6921)

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A code-quality PR

Also cleans up the helper methods by just importing the `Event` type

Co-authored-by: devil-ira <justthecooldude@gmail.com>
This commit is contained in:
ira 2022-12-20 16:17:07 +00:00
parent 1523c38ce8
commit 0761594dd8
2 changed files with 29 additions and 46 deletions
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15
crates/bevy_ecs/src/world/mod.rs
View file

@ -15,6 +15,7 @@ use crate::{
Component, ComponentDescriptor, ComponentId, ComponentInfo, Components, TickCells,
},
entity::{AllocAtWithoutReplacement, Entities, Entity, EntityLocation},
event::{Event, Events},
query::{QueryState, ReadOnlyWorldQuery, WorldQuery},
storage::{ResourceData, SparseSet, Storages},
system::Resource,
@ -1268,22 +1269,22 @@ impl World {
result
}
/// Sends an [`Event`](crate::event::Event).
/// Sends an [`Event`].
#[inline]
pub fn send_event<E: crate::event::Event>(&mut self, event: E) {
pub fn send_event<E: Event>(&mut self, event: E) {
self.send_event_batch(std::iter::once(event));
}
/// Sends the default value of the [`Event`](crate::event::Event) of type `E`.
/// Sends the default value of the [`Event`] of type `E`.
#[inline]
pub fn send_event_default<E: crate::event::Event + Default>(&mut self) {
pub fn send_event_default<E: Event + Default>(&mut self) {
self.send_event_batch(std::iter::once(E::default()));
}
/// Sends a batch of [`Event`](crate::event::Event)s from an iterator.
/// Sends a batch of [`Event`]s from an iterator.
#[inline]
pub fn send_event_batch<E: crate::event::Event>(&mut self, events: impl Iterator<Item = E>) {
match self.get_resource_mut::<crate::event::Events<E>>() {
pub fn send_event_batch<E: Event>(&mut self, events: impl IntoIterator<Item = E>) {
match self.get_resource_mut::<Events<E>>() {
Some(mut events_resource) => events_resource.extend(events),
None => bevy_utils::tracing::error!(
"Unable to send event `{}`\n\tEvent must be added to the app with `add_event()`\n\thttps://docs.rs/bevy/*/bevy/app/struct.App.html#method.add_event ",

60
crates/bevy_hierarchy/src/child_builder.rs
View file

@ -2,20 +2,11 @@ use crate::{Children, HierarchyEvent, Parent};
use bevy_ecs::{
bundle::Bundle,
entity::Entity,
event::Events,
system::{Command, Commands, EntityCommands},
world::{EntityMut, World},
};
use smallvec::SmallVec;
fn push_events(world: &mut World, events: SmallVec<[HierarchyEvent; 8]>) {
if let Some(mut moved) = world.get_resource_mut::<Events<HierarchyEvent>>() {
for evt in events {
moved.send(evt);
}
}
}
fn push_child_unchecked(world: &mut World, parent: Entity, child: Entity) {
let mut parent = world.entity_mut(parent);
if let Some(mut children) = parent.get_mut::<Children>() {
@ -64,7 +55,7 @@ fn update_old_parents(world: &mut World, parent: Entity, children: &[Entity]) {
});
}
}
push_events(world, moved);
world.send_event_batch(moved);
}
fn remove_children(parent: Entity, children: &[Entity], world: &mut World) {
@ -83,7 +74,7 @@ fn remove_children(parent: Entity, children: &[Entity], world: &mut World) {
world.entity_mut(child).remove::<Parent>();
}
}
push_events(world, events);
world.send_event_batch(events);
let mut parent = world.entity_mut(parent);
if let Some(mut parent_children) = parent.get_mut::<Children>() {
@ -114,19 +105,16 @@ impl Command for AddChild {
return;
}
remove_from_children(world, previous, self.child);
if let Some(mut events) = world.get_resource_mut::<Events<HierarchyEvent>>() {
events.send(HierarchyEvent::ChildMoved {
child: self.child,
previous_parent: previous,
new_parent: self.parent,
});
}
} else if let Some(mut events) = world.get_resource_mut::<Events<HierarchyEvent>>() {
events.send(HierarchyEvent::ChildAdded {
world.send_event(HierarchyEvent::ChildMoved {
child: self.child,
parent: self.parent,
previous_parent: previous,
new_parent: self.parent,
});
}
world.send_event(HierarchyEvent::ChildAdded {
child: self.child,
parent: self.parent,
});
let mut parent = world.entity_mut(self.parent);
if let Some(mut children) = parent.get_mut::<Children>() {
if !children.contains(&self.child) {
@ -202,12 +190,10 @@ impl Command for RemoveParent {
let parent_entity = parent.get();
remove_from_children(world, parent_entity, self.child);
world.entity_mut(self.child).remove::<Parent>();
if let Some(mut events) = world.get_resource_mut::<Events<_>>() {
events.send(HierarchyEvent::ChildRemoved {
child: self.child,
parent: parent_entity,
});
}
world.send_event(HierarchyEvent::ChildRemoved {
child: self.child,
parent: parent_entity,
});
}
}
}
@ -354,12 +340,10 @@ impl<'w> WorldChildBuilder<'w> {
pub fn spawn(&mut self, bundle: impl Bundle + Send + Sync + 'static) -> EntityMut<'_> {
let entity = self.world.spawn((bundle, Parent(self.parent))).id();
push_child_unchecked(self.world, self.parent, entity);
if let Some(mut added) = self.world.get_resource_mut::<Events<HierarchyEvent>>() {
added.send(HierarchyEvent::ChildAdded {
child: entity,
parent: self.parent,
});
}
self.world.send_event(HierarchyEvent::ChildAdded {
child: entity,
parent: self.parent,
});
self.world.entity_mut(entity)
}
@ -367,12 +351,10 @@ impl<'w> WorldChildBuilder<'w> {
pub fn spawn_empty(&mut self) -> EntityMut<'_> {
let entity = self.world.spawn(Parent(self.parent)).id();
push_child_unchecked(self.world, self.parent, entity);
if let Some(mut added) = self.world.get_resource_mut::<Events<HierarchyEvent>>() {
added.send(HierarchyEvent::ChildAdded {
child: entity,
parent: self.parent,
});
}
self.world.send_event(HierarchyEvent::ChildAdded {
child: entity,
parent: self.parent,
});
self.world.entity_mut(entity)
}