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LibWeb: Implement AbortSignal.timeout()

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This method returns a signal that will automatically abort after a
given number of milliseconds.
This commit is contained in:
Tim Ledbetter 2024-02-26 17:52:32 +00:00 • committed by Tim Flynn
parent 3c288c96e6
commit ae42c6ed80
5 changed files with 48 additions and 1 deletions
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28
Userland/Libraries/LibWeb/DOM/AbortSignal.cpp
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@ -9,6 +9,8 @@
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/EventDispatcher.h>
#include <LibWeb/HTML/EventHandler.h>
#include <LibWeb/HTML/Window.h>
#include <LibWeb/HTML/WindowOrWorkerGlobalScope.h>
namespace Web::DOM {
@ -132,4 +134,30 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::abort(JS::VM& vm
return signal;
}
// https://dom.spec.whatwg.org/#dom-abortsignal-timeout
WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::timeout(JS::VM& vm, WebIDL::UnsignedLongLong milliseconds)
{
auto& realm = *vm.current_realm();
// 1. Let signal be a new AbortSignal object.
auto signal = TRY(construct_impl(realm));
// 2. Let global be signal’s relevant global object.
auto& global = HTML::relevant_global_object(signal);
auto* window_or_worker = dynamic_cast<HTML::WindowOrWorkerGlobalScopeMixin*>(&global);
VERIFY(window_or_worker);
// 3. Run steps after a timeout given global, "AbortSignal-timeout", milliseconds, and the following step:
window_or_worker->run_steps_after_a_timeout(milliseconds, [&realm, &global, strong_signal = JS::make_handle(signal)]() {
// 1. Queue a global task on the timer task source given global to signal abort given signal and a new "TimeoutError" DOMException.
HTML::queue_global_task(HTML::Task::Source::TimerTask, global, [&realm, &strong_signal]() mutable {
auto reason = WebIDL::TimeoutError::create(realm, "Signal timed out"_fly_string);
strong_signal->signal_abort(reason);
});
});
// 4. Return signal.
return signal;
}
}