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LibWeb: Split out SimilarOriginWindowAgent from HTML::Agent

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To allow for adding the concept of a WorkerAgent to be reused
between shared and dedicated workers. An event loop is the
commonality between the different agent types, though, there
are some differences between those event loops which we customize
on the construction of the HTML::EventLoop.
This commit is contained in:
Shannon Booth 2025-04-24 15:04:13 +12:00 • committed by Andreas Kling
parent 939bb10828
commit 084cceab5c
Notes: github-actions[bot] 2025-04-25 14:45:55 +00:00
11 changed files with 103 additions and 54 deletions
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33
Libraries/LibWeb/HTML/Scripting/Agent.h
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@ -6,45 +6,20 @@
#pragma once
#include <AK/OwnPtr.h>
#include <AK/Vector.h>
#include <LibGC/Root.h>
#include <LibJS/Forward.h>
#include <LibJS/Runtime/Agent.h>
#include <LibWeb/DOM/MutationObserver.h>
#include <LibWeb/Forward.h>
#include <LibWeb/HTML/CustomElements/CustomElementReactionsStack.h>
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/webappapis.html#similar-origin-window-agent
struct Agent : public JS::Agent {
// https://html.spec.whatwg.org/multipage/webappapis.html#window-event-loop
// The event loop of a similar-origin window agent is known as a window event loop.
// The event loop of a dedicated worker agent, shared worker agent, or service worker agent is known as a worker event loop.
// And the event loop of a worklet agent is known as a worklet event loop.
GC::Root<HTML::EventLoop> event_loop;
// FIXME: These should only be on similar-origin window agents, but we don't currently differentiate agent types.
// https://dom.spec.whatwg.org/#mutation-observer-compound-microtask-queued-flag
bool mutation_observer_microtask_queued { false };
// https://dom.spec.whatwg.org/#mutation-observer-list
DOM::MutationObserver::List mutation_observers;
// https://html.spec.whatwg.org/multipage/custom-elements.html#custom-element-reactions-stack
// Each similar-origin window agent has a custom element reactions stack, which is initially empty.
CustomElementReactionsStack custom_element_reactions_stack {};
// https://dom.spec.whatwg.org/#signal-slot-list
// Each similar-origin window agent has signal slots (a set of slots), which is initially empty. [HTML]
Vector<GC::Root<HTML::HTMLSlotElement>> signal_slots;
// https://html.spec.whatwg.org/multipage/custom-elements.html#current-element-queue
// A similar-origin window agent's current element queue is the element queue at the top of its custom element reactions stack.
Vector<GC::Root<DOM::Element>>& current_element_queue() { return custom_element_reactions_stack.element_queue_stack.last(); }
Vector<GC::Root<DOM::Element>> const& current_element_queue() const { return custom_element_reactions_stack.element_queue_stack.last(); }
// [[CanBlock]]
virtual bool can_block() const override;
virtual void spin_event_loop_until(GC::Root<GC::Function<bool()>> goal_condition) override;
};