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LibWeb: Implement AbortSignal.any()
This method takes a list of AbortSignals and returns an AbortSignal that is aborted when any of the input signals is aborted.
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5 changed files with 198 additions and 1 deletions
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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* Copyright (c) 2024, Tim Ledbetter <timledbetter@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -67,6 +68,10 @@ void AbortSignal::signal_abort(JS::Value reason)
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auto abort_event = Event::create(realm(), HTML::EventNames::abort);
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abort_event->set_is_trusted(true);
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dispatch_event(abort_event);
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// 6. For each dependentSignal of signal’s dependent signals, signal abort on dependentSignal with signal’s abort reason.
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for (auto const& dependent_signal : m_dependent_signals)
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dependent_signal->signal_abort(reason);
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}
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void AbortSignal::set_onabort(WebIDL::CallbackType* event_handler)
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@ -95,6 +100,12 @@ void AbortSignal::visit_edges(JS::Cell::Visitor& visitor)
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visitor.visit(m_abort_reason);
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for (auto& algorithm : m_abort_algorithms)
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visitor.visit(algorithm);
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for (auto& source_signal : m_source_signals)
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visitor.visit(source_signal);
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for (auto& dependent_signal : m_dependent_signals)
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visitor.visit(dependent_signal);
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}
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// https://dom.spec.whatwg.org/#abortsignal-follow
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@ -162,4 +173,74 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::timeout(JS::VM&
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return signal;
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}
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// https://dom.spec.whatwg.org/#dom-abortsignal-any
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WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::any(JS::VM& vm, JS::Value signals)
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{
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Vector<JS::Handle<AbortSignal>> signals_list;
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auto iterator_record = TRY(get_iterator(vm, signals, JS::IteratorHint::Sync));
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while (true) {
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auto next = TRY(iterator_step_value(vm, iterator_record));
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if (!next.has_value())
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break;
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auto value = next.release_value();
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if (!value.is_object() || !is<AbortSignal>(value.as_object()))
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return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "AbortSignal");
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auto& signal = static_cast<AbortSignal&>(value.as_object());
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signals_list.append(JS::make_handle(signal));
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}
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// The static any(signals) method steps are to return the result of creating a dependent abort signal from signals using AbortSignal and the current realm.
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return create_dependent_abort_signal(*vm.current_realm(), signals_list);
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}
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// https://dom.spec.whatwg.org/#create-a-dependent-abort-signal
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WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::create_dependent_abort_signal(JS::Realm& realm, Vector<JS::Handle<AbortSignal>> const& signals)
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{
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// 1. Let resultSignal be a new object implementing signalInterface using realm.
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auto result_signal = TRY(construct_impl(realm));
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// 2. For each signal of signals: if signal is aborted, then set resultSignal’s abort reason to signal’s abort reason and return resultSignal.
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for (auto const& signal : signals) {
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if (signal->aborted()) {
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result_signal->set_reason(signal->reason());
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return result_signal;
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}
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}
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// 3. Set resultSignal’s dependent to true.
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result_signal->set_dependent(true);
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// 4. For each signal of signals:
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for (auto const& signal : signals) {
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// 1. If signal’s dependent is false, then:
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if (!signal->dependent()) {
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// 1. Append signal to resultSignal’s source signals.
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result_signal->append_source_signal({ signal });
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// 2. Append resultSignal to signal’s dependent signals.
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signal->append_dependent_signal(result_signal);
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}
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// 2. Otherwise, for each sourceSignal of signal’s source signals:
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else {
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for (auto const& source_signal : signal->source_signals()) {
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// 1. Assert: sourceSignal is not aborted and not dependent.
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VERIFY(source_signal);
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VERIFY(!source_signal->aborted());
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VERIFY(!source_signal->dependent());
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// 2. Append sourceSignal to resultSignal’s source signals.
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result_signal->append_source_signal(source_signal);
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// 3. Append resultSignal to sourceSignal’s dependent signals.
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source_signal->append_dependent_signal(result_signal);
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}
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}
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}
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// 5. Return resultSignal
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return result_signal;
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}
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}
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