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e281e3a274
We need to prevent these mutation observers from being garbage collected, and since they are only part of SimilarOriginWindowAgent and themselves as part of the intrusive list, nobody is visiting them. Make the list of pending mutation observers a GC::RootVector so we keep them alive until they have been processed in the microtask. Restores 1400+ WPT subtest passes in `dom/nodes/Element-classlist.html`.
58 lines
2.5 KiB
C++
58 lines
2.5 KiB
C++
/*
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* Copyright (c) 2025, Shannon Booth <shannon@serenityos.org>
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* Copyright (c) 2025, Jelle Raaijmakers <jelle@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/OwnPtr.h>
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#include <AK/Vector.h>
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#include <LibGC/Root.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/Agent.h>
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#include <LibWeb/DOM/MutationObserver.h>
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#include <LibWeb/Export.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/HTML/CustomElements/CustomElementReactionsStack.h>
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#include <LibWeb/HTML/Scripting/Agent.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/multipage/webappapis.html#similar-origin-window-agent
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struct SimilarOriginWindowAgent : public Agent {
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static NonnullOwnPtr<SimilarOriginWindowAgent> create(GC::Heap&);
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// https://dom.spec.whatwg.org/#mutation-observer-compound-microtask-queued-flag
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// Each similar-origin window agent has a mutation observer microtask queued (a boolean), which is initially false. [HTML]
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bool mutation_observer_microtask_queued { false };
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// https://dom.spec.whatwg.org/#mutation-observer-list
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// Each similar-origin window agent also has pending mutation observers (a set of zero or more MutationObserver objects), which is initially empty.
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GC::RootVector<GC::Ref<DOM::MutationObserver>> pending_mutation_observers;
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// https://html.spec.whatwg.org/multipage/custom-elements.html#custom-element-reactions-stack
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// Each similar-origin window agent has a custom element reactions stack, which is initially empty.
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CustomElementReactionsStack custom_element_reactions_stack {};
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// https://dom.spec.whatwg.org/#signal-slot-list
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// Each similar-origin window agent has signal slots (a set of slots), which is initially empty. [HTML]
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Vector<GC::Root<HTML::HTMLSlotElement>> signal_slots;
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// https://html.spec.whatwg.org/multipage/custom-elements.html#current-element-queue
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// A similar-origin window agent's current element queue is the element queue at the top of its custom element reactions stack.
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Vector<GC::Root<DOM::Element>>& current_element_queue() { return custom_element_reactions_stack.element_queue_stack.last(); }
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Vector<GC::Root<DOM::Element>> const& current_element_queue() const { return custom_element_reactions_stack.element_queue_stack.last(); }
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private:
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SimilarOriginWindowAgent(GC::Heap& heap, CanBlock can_block)
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: Agent(can_block)
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, pending_mutation_observers(heap)
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{
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}
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};
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WEB_API SimilarOriginWindowAgent& relevant_similar_origin_window_agent(JS::Object const&);
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}
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