mirror of
https://github.com/RGBCube/serenity
synced 2025-05-16 17:55:06 +00:00
2692db8699
Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
117 lines
3.5 KiB
C++
117 lines
3.5 KiB
C++
/*
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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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/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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namespace Web::DOM {
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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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JS::ThrowCompletionOr<void> AbortSignal::initialize(JS::Realm& realm)
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{
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MUST_OR_THROW_OOM(Base::initialize(realm));
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set_prototype(&Bindings::ensure_web_prototype<Bindings::AbortSignalPrototype>(realm, "AbortSignal"));
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return {};
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}
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// https://dom.spec.whatwg.org/#abortsignal-add
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void AbortSignal::add_abort_algorithm(JS::SafeFunction<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(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").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();
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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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dispatch_event(*Event::create(realm(), HTML::EventNames::abort));
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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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}
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// https://dom.spec.whatwg.org/#abortsignal-follow
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void AbortSignal::follow(JS::NonnullGCPtr<AbortSignal> parent_signal)
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{
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// A followingSignal (an AbortSignal) is made to follow a parentSignal (an AbortSignal) by running these steps:
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// 1. If followingSignal is aborted, then return.
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if (aborted())
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return;
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// 2. If parentSignal is aborted, then signal abort on followingSignal with parentSignal’s abort reason.
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if (parent_signal->aborted()) {
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signal_abort(parent_signal->reason());
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return;
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}
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// 3. Otherwise, add the following abort steps to parentSignal:
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// NOTE: `this` and `parent_signal` are protected by AbortSignal using JS::SafeFunction.
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parent_signal->add_abort_algorithm([this, parent_signal] {
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// 1. Signal abort on followingSignal with parentSignal’s abort reason.
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signal_abort(parent_signal->reason());
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});
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}
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}
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