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91 lines
4.1 KiB
C++
91 lines
4.1 KiB
C++
/*
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* Copyright (c) 2021-2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021-2023, Luke Wilde <lukew@serenityos.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 <LibJS/Forward.h>
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#include <LibJS/Runtime/JobCallback.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/DOM/MutationObserver.h>
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#include <LibWeb/HTML/EventLoop/EventLoop.h>
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namespace Web::Bindings {
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// https://html.spec.whatwg.org/multipage/custom-elements.html#custom-element-reactions-stack
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struct CustomElementReactionsStack {
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CustomElementReactionsStack() = default;
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~CustomElementReactionsStack() = default;
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// https://html.spec.whatwg.org/multipage/custom-elements.html#element-queue
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// Each item in the stack is an element queue, which is initially empty as well. Each item in an element queue is an element.
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// (The elements are not necessarily custom yet, since this queue is used for upgrades as well.)
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Vector<Vector<JS::Handle<DOM::Element>>> element_queue_stack;
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// https://html.spec.whatwg.org/multipage/custom-elements.html#backup-element-queue
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// Each custom element reactions stack has an associated backup element queue, which an initially-empty element queue.
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Vector<JS::Handle<DOM::Element>> backup_element_queue;
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// https://html.spec.whatwg.org/multipage/custom-elements.html#processing-the-backup-element-queue
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// To prevent reentrancy when processing the backup element queue, each custom element reactions stack also has a processing the backup element queue flag, initially unset.
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bool processing_the_backup_element_queue { false };
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};
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struct WebEngineCustomData final : public JS::VM::CustomData {
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virtual ~WebEngineCustomData() override = default;
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virtual void spin_event_loop_until(JS::SafeFunction<bool()> goal_condition) override;
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HTML::EventLoop event_loop;
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// FIXME: These should only be on similar-origin window agents, but we don't currently differentiate agent types.
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// https://dom.spec.whatwg.org/#mutation-observer-compound-microtask-queued-flag
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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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// FIXME: This should be a set.
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Vector<JS::Handle<DOM::MutationObserver>> mutation_observers;
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JS::Handle<JS::Realm> internal_realm;
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OwnPtr<JS::ExecutionContext> root_execution_context;
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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://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<JS::Handle<DOM::Element>>& current_element_queue() { return custom_element_reactions_stack.element_queue_stack.last(); }
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Vector<JS::Handle<DOM::Element>> const& current_element_queue() const { return custom_element_reactions_stack.element_queue_stack.last(); }
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};
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struct WebEngineCustomJobCallbackData final : public JS::JobCallback::CustomData {
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WebEngineCustomJobCallbackData(HTML::EnvironmentSettingsObject& incumbent_settings, OwnPtr<JS::ExecutionContext> active_script_context)
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: incumbent_settings(incumbent_settings)
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, active_script_context(move(active_script_context))
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{
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}
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virtual ~WebEngineCustomJobCallbackData() override = default;
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JS::NonnullGCPtr<HTML::EnvironmentSettingsObject> incumbent_settings;
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OwnPtr<JS::ExecutionContext> active_script_context;
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};
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HTML::Script* active_script();
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ErrorOr<void> initialize_main_thread_vm();
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JS::VM& main_thread_vm();
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void queue_mutation_observer_microtask(DOM::Document const&);
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NonnullOwnPtr<JS::ExecutionContext> create_a_new_javascript_realm(JS::VM&, Function<JS::Object*(JS::Realm&)> create_global_object, Function<JS::Object*(JS::Realm&)> create_global_this_value);
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void invoke_custom_element_reactions(Vector<JS::Handle<DOM::Element>>& element_queue);
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}
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