mirror of
https://github.com/servo/servo
synced 2026-04-26 01:25:32 +02:00
d7324d7279
Continuation of #41520 to use more safe cx in promises, now by passing &mut CurrentRealm in callbacks. Most callback implementations still do conversions to old SafeJSContext, so there are some low hanging stuff for follow ups. Testing: Should be covered by existing WPT tests. try run: https://github.com/sagudev/servo/actions/runs/20540030020 Part of #40600 --------- Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
63 lines
2.0 KiB
Rust
63 lines
2.0 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use dom_struct::dom_struct;
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use js::realm::CurrentRealm;
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use js::rust::HandleValue;
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use malloc_size_of::MallocSizeOf;
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use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::bindings::trace::JSTraceable;
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use crate::dom::globalscope::GlobalScope;
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use crate::script_runtime::CanGc;
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/// Types that implement the `Callback` trait follow the same rooting requirements
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/// as types that use the `#[dom_struct]` attribute.
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/// Prefer storing `Dom<T>` members inside them instead of `DomRoot<T>`
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/// to minimize redundant work by the garbage collector.
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pub(crate) trait Callback: JSTraceable + MallocSizeOf {
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fn callback(&self, cx: &mut CurrentRealm, v: HandleValue);
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}
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#[dom_struct]
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pub(crate) struct PromiseNativeHandler {
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reflector: Reflector,
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resolve: Option<Box<dyn Callback>>,
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reject: Option<Box<dyn Callback>>,
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}
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impl PromiseNativeHandler {
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pub(crate) fn new(
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global: &GlobalScope,
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resolve: Option<Box<dyn Callback>>,
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reject: Option<Box<dyn Callback>>,
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can_gc: CanGc,
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) -> DomRoot<PromiseNativeHandler> {
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reflect_dom_object(
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Box::new(PromiseNativeHandler {
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reflector: Reflector::new(),
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resolve,
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reject,
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}),
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global,
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can_gc,
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)
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}
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fn callback(callback: &Option<Box<dyn Callback>>, cx: &mut CurrentRealm, v: HandleValue) {
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if let Some(ref callback) = *callback {
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callback.callback(cx, v)
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}
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}
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pub(crate) fn resolved_callback(&self, cx: &mut CurrentRealm, v: HandleValue) {
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PromiseNativeHandler::callback(&self.resolve, cx, v)
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}
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pub(crate) fn rejected_callback(&self, cx: &mut CurrentRealm, v: HandleValue) {
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PromiseNativeHandler::callback(&self.reject, cx, v)
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}
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}
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