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LibWeb: Make Document::m_intersection_observers a weak mapping

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These registrations are not meant to keep the observers alive.
This fixes a handful of world leaks on Speedometer.
This commit is contained in:
Andreas Kling 2024-11-11 16:31:24 +01:00 • committed by Andreas Kling
commit b397a0d535
Notes: github-actions[bot] 2024-11-11 20:41:59 +00:00
2 changed files with 10 additions and 4 deletions
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10
Libraries/LibWeb/DOM/Document.cpp
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@ -505,7 +505,6 @@ void Document::visit_edges(Cell::Visitor& visitor)
visitor.visit(m_document_observers);
visitor.visit(m_pending_scroll_event_targets);
visitor.visit(m_pending_scrollend_event_targets);
visitor.visit(m_intersection_observers);
visitor.visit(m_resize_observers);
visitor.visit(m_shared_resource_requests);
@ -4037,7 +4036,14 @@ void Document::run_the_update_intersection_observations_steps(HighResolutionTime
// 1. Let observer list be a list of all IntersectionObservers whose root is in the DOM tree of document.
// For the top-level browsing context, this includes implicit root observers.
// 2. For each observer in observer list:
for (auto& observer : m_intersection_observers) {
// NOTE: We make a copy of the intersection observers list to avoid modifying it while iterating.
JS::MarkedVector<JS::NonnullGCPtr<IntersectionObserver::IntersectionObserver>> intersection_observers(heap());
intersection_observers.ensure_capacity(m_intersection_observers.size());
for (auto& observer : m_intersection_observers)
intersection_observers.append(observer);
for (auto& observer : intersection_observers) {
// 1. Let rootBounds be observer’s root intersection rectangle.
auto root_bounds = observer->root_intersection_rectangle();