111 lines
3.8 KiB
Rust
111 lines
3.8 KiB
Rust
use futures_util::FutureExt;
|
|
use std::{
|
|
rc::Rc,
|
|
task::{Context, Poll},
|
|
};
|
|
|
|
use crate::{
|
|
innerlude::{Mutation, Mutations, SuspenseContext},
|
|
nodes::RenderReturn,
|
|
ScopeId, TaskId, VNode, VirtualDom,
|
|
};
|
|
|
|
use super::{waker::RcWake, SuspenseId};
|
|
|
|
impl VirtualDom {
|
|
/// Handle notifications by tasks inside the scheduler
|
|
///
|
|
/// This is precise, meaning we won't poll every task, just tasks that have woken up as notified to use by the
|
|
/// queue
|
|
pub(crate) fn handle_task_wakeup(&mut self, id: TaskId) {
|
|
let mut tasks = self.scheduler.tasks.borrow_mut();
|
|
|
|
let task = match tasks.get(id.0) {
|
|
Some(task) => task,
|
|
None => return,
|
|
};
|
|
|
|
let waker = task.waker();
|
|
let mut cx = Context::from_waker(&waker);
|
|
|
|
// If the task completes...
|
|
if task.task.borrow_mut().as_mut().poll(&mut cx).is_ready() {
|
|
// Remove it from the scope so we dont try to double drop it when the scope dropes
|
|
self.scopes[task.scope.0].spawned_tasks.remove(&id);
|
|
|
|
// Remove it from the scheduler
|
|
tasks.remove(id.0);
|
|
}
|
|
}
|
|
|
|
pub(crate) fn acquire_suspense_boundary(&self, id: ScopeId) -> Rc<SuspenseContext> {
|
|
self.scopes[id.0]
|
|
.consume_context::<Rc<SuspenseContext>>()
|
|
.unwrap()
|
|
}
|
|
|
|
pub(crate) fn handle_suspense_wakeup(&mut self, id: SuspenseId) {
|
|
let leaf = self
|
|
.scheduler
|
|
.leaves
|
|
.borrow_mut()
|
|
.get(id.0)
|
|
.unwrap()
|
|
.clone();
|
|
|
|
let scope_id = leaf.scope_id;
|
|
|
|
// todo: cache the waker
|
|
let waker = leaf.waker();
|
|
let mut cx = Context::from_waker(&waker);
|
|
|
|
// Safety: the future is always pinned to the bump arena
|
|
let mut pinned = unsafe { std::pin::Pin::new_unchecked(&mut *leaf.task) };
|
|
let as_pinned_mut = &mut pinned;
|
|
|
|
// the component finished rendering and gave us nodes
|
|
// we should attach them to that component and then render its children
|
|
// continue rendering the tree until we hit yet another suspended component
|
|
if let Poll::Ready(new_nodes) = as_pinned_mut.poll_unpin(&mut cx) {
|
|
// safety: we're not going to modify the suspense context but we don't want to make a clone of it
|
|
let fiber = self.acquire_suspense_boundary(leaf.scope_id);
|
|
|
|
let scope = &mut self.scopes[scope_id.0];
|
|
let arena = scope.current_frame();
|
|
|
|
let ret = arena.bump.alloc(RenderReturn::Sync(new_nodes));
|
|
arena.node.set(ret);
|
|
|
|
fiber.waiting_on.borrow_mut().remove(&id);
|
|
|
|
if let RenderReturn::Sync(Some(template)) = ret {
|
|
let mutations_ref = &mut fiber.mutations.borrow_mut();
|
|
let mutations = &mut **mutations_ref;
|
|
let template: &VNode = unsafe { std::mem::transmute(template) };
|
|
let mutations: &mut Mutations = unsafe { std::mem::transmute(mutations) };
|
|
|
|
std::mem::swap(&mut self.mutations, mutations);
|
|
|
|
let place_holder_id = scope.placeholder.get().unwrap();
|
|
self.scope_stack.push(scope_id);
|
|
let created = self.create(template);
|
|
self.scope_stack.pop();
|
|
mutations.push(Mutation::ReplaceWith {
|
|
id: place_holder_id,
|
|
m: created,
|
|
});
|
|
|
|
for leaf in self.collected_leaves.drain(..) {
|
|
fiber.waiting_on.borrow_mut().insert(leaf);
|
|
}
|
|
|
|
std::mem::swap(&mut self.mutations, mutations);
|
|
|
|
if fiber.waiting_on.borrow().is_empty() {
|
|
self.finished_fibers.push(fiber.id);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|