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205 lines
7.3 KiB
C++
205 lines
7.3 KiB
C++
/*
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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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#include <LibWeb/Bindings/AbortSignalPrototype.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/DOM/AbortSignal.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/EventDispatcher.h>
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#include <LibWeb/HTML/EventHandler.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/HTML/WindowOrWorkerGlobalScope.h>
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namespace Web::DOM {
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JS_DEFINE_ALLOCATOR(AbortSignal);
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WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::construct_impl(JS::Realm& realm)
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{
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return realm.heap().allocate<AbortSignal>(realm, realm);
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}
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AbortSignal::AbortSignal(JS::Realm& realm)
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: EventTarget(realm)
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{
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}
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void AbortSignal::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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WEB_SET_PROTOTYPE_FOR_INTERFACE(AbortSignal);
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}
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// https://dom.spec.whatwg.org/#abortsignal-add
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void AbortSignal::add_abort_algorithm(Function<void()> abort_algorithm)
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{
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// 1. If signal is aborted, then return.
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if (aborted())
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return;
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// 2. Append algorithm to signal’s abort algorithms.
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m_abort_algorithms.append(JS::create_heap_function(vm().heap(), move(abort_algorithm)));
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}
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// https://dom.spec.whatwg.org/#abortsignal-signal-abort
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void AbortSignal::signal_abort(JS::Value reason)
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{
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// 1. If signal is aborted, then return.
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if (aborted())
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return;
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// 2. Set signal’s abort reason to reason if it is given; otherwise to a new "AbortError" DOMException.
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if (!reason.is_undefined())
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m_abort_reason = reason;
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else
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m_abort_reason = WebIDL::AbortError::create(realm(), "Aborted without reason"_fly_string).ptr();
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// 3. For each algorithm in signal’s abort algorithms: run algorithm.
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for (auto& algorithm : m_abort_algorithms)
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algorithm->function()();
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// 4. Empty signal’s abort algorithms.
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m_abort_algorithms.clear();
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// 5. Fire an event named abort at signal.
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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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{
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set_event_handler_attribute(HTML::EventNames::abort, event_handler);
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}
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WebIDL::CallbackType* AbortSignal::onabort()
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{
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return event_handler_attribute(HTML::EventNames::abort);
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}
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// https://dom.spec.whatwg.org/#dom-abortsignal-throwifaborted
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JS::ThrowCompletionOr<void> AbortSignal::throw_if_aborted() const
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{
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// The throwIfAborted() method steps are to throw this’s abort reason, if this is aborted.
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if (!aborted())
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return {};
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return JS::throw_completion(m_abort_reason);
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}
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void AbortSignal::visit_edges(JS::Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_abort_reason);
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visitor.visit(m_abort_algorithms);
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visitor.visit(m_source_signals);
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visitor.visit(m_dependent_signals);
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}
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// https://dom.spec.whatwg.org/#dom-abortsignal-abort
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WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::abort(JS::VM& vm, JS::Value reason)
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{
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// 1. Let signal be a new AbortSignal object.
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auto signal = TRY(construct_impl(*vm.current_realm()));
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// 2. Set signal’s abort reason to reason if it is given; otherwise to a new "AbortError" DOMException.
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if (reason.is_undefined())
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reason = WebIDL::AbortError::create(*vm.current_realm(), "Aborted without reason"_fly_string).ptr();
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signal->set_reason(reason);
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// 3. Return signal.
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return signal;
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}
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// https://dom.spec.whatwg.org/#dom-abortsignal-timeout
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WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::timeout(JS::VM& vm, WebIDL::UnsignedLongLong milliseconds)
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{
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auto& realm = *vm.current_realm();
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// 1. Let signal be a new AbortSignal object.
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auto signal = TRY(construct_impl(realm));
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// 2. Let global be signal’s relevant global object.
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auto& global = HTML::relevant_global_object(signal);
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auto* window_or_worker = dynamic_cast<HTML::WindowOrWorkerGlobalScopeMixin*>(&global);
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VERIFY(window_or_worker);
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// 3. Run steps after a timeout given global, "AbortSignal-timeout", milliseconds, and the following step:
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window_or_worker->run_steps_after_a_timeout(milliseconds, [&realm, &global, signal]() {
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// 1. Queue a global task on the timer task source given global to signal abort given signal and a new "TimeoutError" DOMException.
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HTML::queue_global_task(HTML::Task::Source::TimerTask, global, JS::create_heap_function(realm.heap(), [&realm, signal]() mutable {
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auto reason = WebIDL::TimeoutError::create(realm, "Signal timed out"_fly_string);
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signal->signal_abort(reason);
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}));
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});
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// 4. Return signal.
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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, Vector<JS::Handle<AbortSignal>> const& signals)
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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);
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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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