l8r/
lib.rs

1pub struct L8r<W>(Vec<Box<dyn FnOnce(&mut W)>>);
2impl<W> L8r<W> {
3    pub fn new() -> Self {
4        L8r(Vec::new())
5    }
6
7    pub fn schedule(&mut self, then: Box<dyn FnOnce(&mut W)>) {
8        self.0.push(then);
9    }
10
11    pub fn l8r<F: 'static + Send + Sync + FnOnce(&mut W)>(&mut self, then: F) {
12        self.0.push(Box::new(then));
13    }
14
15    pub fn drain(&mut self) -> Vec<Box<dyn FnOnce(&mut W)>> {
16        self.0.drain(..).collect::<Vec<_>>()
17    }
18
19    pub fn now(l8rs: Vec<Box<dyn FnOnce(&mut W)>>, world: &mut W) {
20        for l8r in l8rs.into_iter() {
21            l8r(world);
22        }
23    }
24}
25impl<W> L8r<W>
26where W: ContainsHecsWorld {
27    pub fn insert_one<C: hecs::Component>(&mut self, ent: hecs::Entity, component: C) {
28        self.l8r(move |world| world.ecs_mut().insert_one(ent, component).unwrap())
29    }
30
31    pub fn remove_one<C: hecs::Component>(&mut self, ent: hecs::Entity) {
32        self.l8r(move |world| drop(world.ecs_mut().remove_one::<C>(ent)))
33    }
34
35    pub fn insert<C: 'static + Send + Sync + hecs::DynamicBundle>(
36        &mut self,
37        ent: hecs::Entity,
38        components_bundle: C,
39    ) {
40        self.l8r(move |world| world.ecs_mut().insert(ent, components_bundle).unwrap())
41    }
42
43    pub fn spawn<C: 'static + Send + Sync + hecs::DynamicBundle>(&mut self, components_bundle: C) {
44        self.l8r(move |world| drop(world.ecs_mut().spawn(components_bundle)))
45    }
46
47    pub fn despawn(&mut self, entity: hecs::Entity) {
48        self.l8r(move |world| drop(world.ecs_mut().despawn(entity)))
49    }
50}
51
52pub trait ContainsHecsWorld {
53    fn ecs(&self) -> &hecs::World;
54
55    fn ecs_mut(&mut self) -> &mut hecs::World;
56}
57
l8r/lib.rs

l8r/
lib.rs
