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LibWeb: Run queued promise jobs after callbacks

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We now run queued promise jobs after calling event handler, timer, and
requestAnimationFrame() callbacks - this is a bit ad-hoc, but I don't
want to switch LibWeb to use an event loop right now - this works just
fine, too.
We might want to revisit this at a later point and do tasks and
microtasks properly.
This commit is contained in:
Linus Groh 2021-04-01 22:13:42 +02:00 • committed by Andreas Kling
parent f418115f1b
commit ade3adcc7a
3 changed files with 12 additions and 2 deletions
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8
Userland/Libraries/LibWeb/DOM/Document.cpp
View file

@ -543,8 +543,12 @@ Color Document::visited_link_color() const
JS::Interpreter& Document::interpreter()
{
if (!m_interpreter)
m_interpreter = JS::Interpreter::create<Bindings::WindowObject>(Bindings::main_thread_vm(), *m_window);
if (!m_interpreter) {
auto& vm = Bindings::main_thread_vm();
// TODO: Hook up vm.on_promise_unhandled_rejection and vm.on_promise_rejection_handled
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises#promise_rejection_events
m_interpreter = JS::Interpreter::create<Bindings::WindowObject>(vm, *m_window);
}
return *m_interpreter;
}

2
Userland/Libraries/LibWeb/DOM/EventDispatcher.cpp
View file

@ -114,6 +114,8 @@ bool EventDispatcher::inner_invoke(Event& event, Vector<EventTarget::EventListen
vm.clear_exception();
// FIXME: Set legacyOutputDidListenersThrowFlag if given. (Only used by IndexedDB currently)
}
vm.run_queued_promise_jobs();
VERIFY(!vm.exception());
event.set_in_passive_listener(false);
if (is<Bindings::WindowObject>(global)) {

4
Userland/Libraries/LibWeb/DOM/Window.cpp
View file

@ -109,6 +109,8 @@ void Window::timer_did_fire(Badge<Timer>, Timer& timer)
[[maybe_unused]] auto rc = vm.call(timer.callback(), wrapper());
if (vm.exception())
vm.clear_exception();
vm.run_queued_promise_jobs();
VERIFY(!vm.exception());
}
i32 Window::allocate_timer_id(Badge<Timer>)
@ -143,6 +145,8 @@ i32 Window::request_animation_frame(JS::Function& callback)
[[maybe_unused]] auto rc = vm.call(function, JS::js_undefined(), JS::Value(fake_timestamp));
if (vm.exception())
vm.clear_exception();
vm.run_queued_promise_jobs();
VERIFY(!vm.exception());
GUI::DisplayLink::unregister_callback(link_id);
});