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- /*
- * Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #pragma once
- #include <AK/Vector.h>
- #include <LibCore/Timer.h>
- #include <LibJS/Heap/GCPtr.h>
- #include <LibJS/SafeFunction.h>
- #include <LibWeb/Forward.h>
- namespace Web::HTML {
- struct SessionHistoryTraversalQueueEntry {
- JS::SafeFunction<void()> steps;
- JS::GCPtr<HTML::Navigable> target_navigable;
- };
- // https://html.spec.whatwg.org/multipage/document-sequences.html#tn-session-history-traversal-queue
- class SessionHistoryTraversalQueue {
- public:
- SessionHistoryTraversalQueue()
- {
- m_timer = Core::Timer::create_single_shot(0, [this] {
- while (m_queue.size() > 0) {
- auto entry = m_queue.take_first();
- entry.steps();
- }
- }).release_value_but_fixme_should_propagate_errors();
- }
- void append(JS::SafeFunction<void()> steps)
- {
- m_queue.append({ move(steps), nullptr });
- if (!m_timer->is_active()) {
- m_timer->start();
- }
- }
- void append_sync(JS::SafeFunction<void()> steps, JS::GCPtr<Navigable> target_navigable)
- {
- m_queue.append({ move(steps), target_navigable });
- if (!m_timer->is_active()) {
- m_timer->start();
- }
- }
- // https://html.spec.whatwg.org/multipage/browsing-the-web.html#sync-navigations-jump-queue
- SessionHistoryTraversalQueueEntry first_synchronous_navigation_steps_with_target_navigable_not_contained_in(Vector<JS::GCPtr<Navigable>> const& list)
- {
- auto index = m_queue.find_first_index_if([&list](auto const& entry) -> bool {
- return (entry.target_navigable != nullptr) && !list.contains_slow(entry.target_navigable);
- });
- return index.has_value() ? m_queue.take(*index) : SessionHistoryTraversalQueueEntry {};
- }
- void process()
- {
- while (m_queue.size() > 0) {
- auto entry = m_queue.take_first();
- entry.steps();
- }
- }
- private:
- Vector<SessionHistoryTraversalQueueEntry> m_queue;
- RefPtr<Core::Timer> m_timer;
- };
- }
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