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https://github.com/SerenityOS/serenity
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LibWeb: Implement synchronous session history steps
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@ -1492,12 +1492,13 @@ WebIDL::ExceptionOr<void> Navigable::navigate_to_a_fragment(AK::URL const& url,
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auto traversable = traversable_navigable();
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// 17. Append the following session history synchronous navigation steps involving navigable to traversable:
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traversable->append_session_history_traversal_steps([this, traversable, history_entry, entry_to_replace] {
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traversable->append_session_history_synchronous_navigation_steps(*this, [this, traversable, history_entry, entry_to_replace, navigation_id] {
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// 1. Finalize a same-document navigation given traversable, navigable, historyEntry, and entryToReplace.
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finalize_a_same_document_navigation(*traversable, *this, history_entry, entry_to_replace);
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// FIXME: 2. Invoke WebDriver BiDi fragment navigated with navigable's active browsing context and a new WebDriver BiDi
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// navigation status whose id is navigationId, url is url, and status is "complete".
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(void)navigation_id;
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});
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return {};
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@ -1903,7 +1904,7 @@ void perform_url_and_history_update_steps(DOM::Document& document, AK::URL new_u
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auto traversable = navigable->traversable_navigable();
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// 13. Append the following session history synchronous navigation steps involving navigable to traversable:
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traversable->append_session_history_traversal_steps([traversable, navigable, new_entry, entry_to_replace] {
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traversable->append_session_history_synchronous_navigation_steps(*navigable, [traversable, navigable, new_entry, entry_to_replace] {
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// 1. Finalize a same-document navigation given traversable, navigable, newEntry, and entryToReplace.
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finalize_a_same_document_navigation(*traversable, *navigable, new_entry, entry_to_replace);
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});
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@ -6,10 +6,19 @@
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#pragma once
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#include <AK/Vector.h>
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#include <LibCore/Timer.h>
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#include <LibJS/Heap/GCPtr.h>
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#include <LibJS/SafeFunction.h>
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#include <LibWeb/Forward.h>
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namespace Web::HTML {
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struct SessionHistoryTraversalQueueEntry {
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JS::SafeFunction<void()> steps;
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JS::GCPtr<HTML::Navigable> target_navigable;
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};
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// https://html.spec.whatwg.org/multipage/document-sequences.html#tn-session-history-traversal-queue
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class SessionHistoryTraversalQueue {
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public:
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@ -17,30 +26,47 @@ public:
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{
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m_timer = Core::Timer::create_single_shot(0, [this] {
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while (m_queue.size() > 0) {
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auto steps = m_queue.take_first();
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steps();
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auto entry = m_queue.take_first();
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entry.steps();
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}
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}).release_value_but_fixme_should_propagate_errors();
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}
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void append(JS::SafeFunction<void()> steps)
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{
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m_queue.append(move(steps));
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m_queue.append({ move(steps), nullptr });
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if (!m_timer->is_active()) {
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m_timer->start();
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}
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}
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void append_sync(JS::SafeFunction<void()> steps, JS::GCPtr<Navigable> target_navigable)
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{
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m_queue.append({ move(steps), target_navigable });
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if (!m_timer->is_active()) {
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m_timer->start();
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}
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}
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// https://html.spec.whatwg.org/multipage/browsing-the-web.html#sync-navigations-jump-queue
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SessionHistoryTraversalQueueEntry first_synchronous_navigation_steps_with_target_navigable_not_contained_in(Vector<JS::GCPtr<Navigable>> const& list)
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{
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auto index = m_queue.find_first_index_if([&list](auto const& entry) -> bool {
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return (entry.target_navigable != nullptr) && !list.contains_slow(entry.target_navigable);
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});
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return index.has_value() ? m_queue.take(*index) : SessionHistoryTraversalQueueEntry {};
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}
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void process()
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{
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while (m_queue.size() > 0) {
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auto steps = m_queue.take_first();
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steps();
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auto entry = m_queue.take_first();
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entry.steps();
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}
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}
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private:
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Vector<JS::SafeFunction<void()>> m_queue;
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Vector<SessionHistoryTraversalQueueEntry> m_queue;
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RefPtr<Core::Timer> m_timer;
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};
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@ -352,7 +352,6 @@ TraversableNavigable::HistoryStepResult TraversableNavigable::apply_the_history_
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// 5. FIXME: If checkForCancelation is true, and the result of checking if unloading is canceled given navigablesCrossingDocuments, traversable, targetStep,
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// and userInvolvementForNavigateEvents is not "continue", then return that result.
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(void)check_for_cancelation;
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(void)user_involvement_for_navigate_events;
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// 6. Let changingNavigables be the result of get all navigables whose current session history entry will change or reload given traversable and targetStep.
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auto changing_navigables = move(change_or_reload_navigables);
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@ -477,12 +476,14 @@ TraversableNavigable::HistoryStepResult TraversableNavigable::apply_the_history_
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// 7. In parallel, attempt to populate the history entry's document for targetEntry, given navigable, potentiallyTargetSpecificSourceSnapshotParams,
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// targetSnapshotParams, with allowPOST set to allowPOST and completionSteps set to queue a global task on the navigation and traversal task source given
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// navigable's active window to run afterDocumentPopulated.
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navigable->populate_session_history_entry_document(target_entry, *potentially_target_specific_source_snapshot_params, target_snapshot_params, {}, Empty {}, CSPNavigationType::Other, allow_POST, [this, after_document_populated]() mutable {
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queue_global_task(Task::Source::NavigationAndTraversal, *active_window(), [after_document_populated]() mutable {
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after_document_populated();
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});
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})
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.release_value_but_fixme_should_propagate_errors();
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Platform::EventLoopPlugin::the().deferred_invoke([target_entry, potentially_target_specific_source_snapshot_params, target_snapshot_params, this, allow_POST, navigable, after_document_populated] {
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navigable->populate_session_history_entry_document(target_entry, *potentially_target_specific_source_snapshot_params, target_snapshot_params, {}, Empty {}, CSPNavigationType::Other, allow_POST, [this, after_document_populated]() mutable {
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queue_global_task(Task::Source::NavigationAndTraversal, *active_window(), [after_document_populated]() mutable {
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after_document_populated();
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});
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})
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.release_value_but_fixme_should_propagate_errors();
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});
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}
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// Otherwise, run afterDocumentPopulated immediately.
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else {
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@ -491,11 +492,35 @@ TraversableNavigable::HistoryStepResult TraversableNavigable::apply_the_history_
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});
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}
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// FIXME: 13. Let navigablesThatMustWaitBeforeHandlingSyncNavigation be an empty set.
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// 13. Let navigablesThatMustWaitBeforeHandlingSyncNavigation be an empty set.
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Vector<JS::GCPtr<Navigable>> navigables_that_must_wait_before_handling_sync_navigation;
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// FIXME: 14. While completedChangeJobs does not equal totalChangeJobs:
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// 14. While completedChangeJobs does not equal totalChangeJobs:
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while (completed_change_jobs != total_change_jobs) {
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// FIXME: 1. If traversable's running nested apply history step is false, then:
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// NOTE: Synchronous navigations that are intended to take place before this traversal jump the queue at this point,
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// so they can be added to the correct place in traversable's session history entries before this traversal
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// potentially unloads their document. More details can be found here (https://html.spec.whatwg.org/multipage/browsing-the-web.html#sync-navigation-steps-queue-jumping-examples)
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// 1. If traversable's running nested apply history step is false, then:
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if (!m_running_nested_apply_history_step) {
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// 1. While traversable's session history traversal queue's algorithm set contains one or more synchronous
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// navigation steps with a target navigable not contained in navigablesThatMustWaitBeforeHandlingSyncNavigation:
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// 1. Let steps be the first item in traversable's session history traversal queue's algorithm set
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// that is synchronous navigation steps with a target navigable not contained in navigablesThatMustWaitBeforeHandlingSyncNavigation.
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// 2. Remove steps from traversable's session history traversal queue's algorithm set.
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for (auto steps = m_session_history_traversal_queue.first_synchronous_navigation_steps_with_target_navigable_not_contained_in(navigables_that_must_wait_before_handling_sync_navigation);
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steps.target_navigable != nullptr;
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steps = m_session_history_traversal_queue.first_synchronous_navigation_steps_with_target_navigable_not_contained_in(navigables_that_must_wait_before_handling_sync_navigation)) {
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// 3. Set traversable's running nested apply history step to true.
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m_running_nested_apply_history_step = true;
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// 4. Run steps.
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steps.steps();
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// 5. Set traversable's running nested apply history step to false.
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m_running_nested_apply_history_step = false;
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}
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}
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// AD-HOC: Since currently populate_session_history_entry_document does not run in parallel
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// we call spin_until to interrupt execution of this function and let document population
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@ -534,16 +559,18 @@ TraversableNavigable::HistoryStepResult TraversableNavigable::apply_the_history_
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auto script_history_length = history_object_length_and_index.script_history_length;
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auto script_history_index = history_object_length_and_index.script_history_index;
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// FIXME: 9. Append navigable to navigablesThatMustWaitBeforeHandlingSyncNavigation.
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// 9. Append navigable to navigablesThatMustWaitBeforeHandlingSyncNavigation.
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navigables_that_must_wait_before_handling_sync_navigation.append(*navigable);
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// 10. Let entriesForNavigationAPI be the result of getting session history entries for the navigation API given navigable and targetStep.
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auto entries_for_navigation_api = get_session_history_entries_for_the_navigation_api(*navigable, target_step);
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// 11. Queue a global task on the navigation and traversal task source given navigable's active window to run the steps:
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queue_global_task(Task::Source::NavigationAndTraversal, *navigable->active_window(), [&, target_entry, navigable, displayed_document, update_only = changing_navigable_continuation.update_only, script_history_length, script_history_index, entries_for_navigation_api = move(entries_for_navigation_api)]() mutable {
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queue_global_task(Task::Source::NavigationAndTraversal, *navigable->active_window(), [&completed_change_jobs, target_entry, navigable, displayed_document, update_only = changing_navigable_continuation.update_only, script_history_length, script_history_index, entries_for_navigation_api = move(entries_for_navigation_api), user_involvement_for_navigate_events]() mutable {
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// NOTE: This check is not in the spec but we should not continue navigation if navigable has been destroyed.
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if (navigable->has_been_destroyed())
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if (navigable->has_been_destroyed()) {
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return;
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}
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// 1. If changingNavigableContinuation's update-only is false, then:
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if (!update_only) {
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@ -596,15 +623,47 @@ TraversableNavigable::HistoryStepResult TraversableNavigable::apply_the_history_
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});
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}
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// FIXME: 15. Let totalNonchangingJobs be the size of nonchangingNavigablesThatStillNeedUpdates.
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// 15. Let totalNonchangingJobs be the size of nonchangingNavigablesThatStillNeedUpdates.
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auto total_non_changing_jobs = non_changing_navigables_that_still_need_updates.size();
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// FIXME: 16. Let completedNonchangingJobs be 0.
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// 16. Let completedNonchangingJobs be 0.
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auto completed_non_changing_jobs = 0u;
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// FIXME: 17. Let (scriptHistoryLength, scriptHistoryIndex) be the result of getting the history object length and index given traversable and targetStep.
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// 17. Let (scriptHistoryLength, scriptHistoryIndex) be the result of getting the history object length and index given traversable and targetStep.
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auto length_and_index = get_the_history_object_length_and_index(target_step);
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auto script_history_length = length_and_index.script_history_length;
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auto script_history_index = length_and_index.script_history_index;
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// FIXME: 18. For each navigable of nonchangingNavigablesThatStillNeedUpdates, queue a global task on the navigation and traversal task source given navigable's active window to run the steps:
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// 18. For each navigable of nonchangingNavigablesThatStillNeedUpdates, queue a global task on the navigation and traversal task source given navigable's active window to run the steps:
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for (auto& navigable : non_changing_navigables_that_still_need_updates) {
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queue_global_task(Task::Source::NavigationAndTraversal, *navigable->active_window(), [&] {
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// NOTE: This check is not in the spec but we should not continue navigation if navigable has been destroyed.
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if (navigable->has_been_destroyed()) {
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++completed_non_changing_jobs;
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return;
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}
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// FIXME: 19. Wait for completedNonchangingJobs to equal totalNonchangingJobs.
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// 1. Let document be navigable's active document.
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auto document = navigable->active_document();
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// 2. Set document's history object's index to scriptHistoryIndex.
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document->history()->m_index = script_history_index;
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// 3. Set document's history object's length to scriptHistoryLength.
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document->history()->m_length = script_history_length;
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// 4. Increment completedNonchangingJobs.
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++completed_non_changing_jobs;
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});
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}
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// 19. Wait for completedNonchangingJobs to equal totalNonchangingJobs.
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// AD-HOC: Since currently populate_session_history_entry_document does not run in parallel
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// we call spin_until to interrupt execution of this function and let document population
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// to complete.
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Platform::EventLoopPlugin::the().spin_until([&] {
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return completed_non_changing_jobs == total_non_changing_jobs;
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});
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// 20. Set traversable's current session history step to targetStep.
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m_current_session_history_step = target_step;
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@ -69,6 +69,11 @@ public:
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m_session_history_traversal_queue.append(move(steps));
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}
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void append_session_history_synchronous_navigation_steps(JS::NonnullGCPtr<Navigable> target_navigable, JS::SafeFunction<void()> steps)
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{
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m_session_history_traversal_queue.append_sync(move(steps), target_navigable);
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}
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void process_session_history_traversal_queue()
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{
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m_session_history_traversal_queue.process();
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