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serenity/Userland/Libraries/LibWeb/Bindings/MainThreadVM.h
Andreas Kling eca0873245 LibWeb: Always put a dummy execution context on the main thread VM stack
A lot of code assumes that there's a current execution context. By
setting up a dummy context right after creating the main thread VM,
we ensure that such code can always run.
2022-08-05 12:42:46 +02:00

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C++

/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullRefPtrVector.h>
#include <LibJS/Forward.h>
#include <LibJS/Runtime/JobCallback.h>
#include <LibJS/Runtime/VM.h>
#include <LibWeb/DOM/MutationObserver.h>
#include <LibWeb/HTML/EventLoop/EventLoop.h>
namespace Web::Bindings {
struct WebEngineCustomData final : public JS::VM::CustomData {
virtual ~WebEngineCustomData() override = default;
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
// FIXME: This should be a set.
NonnullRefPtrVector<DOM::MutationObserver> mutation_observers;
OwnPtr<JS::ExecutionContext> root_execution_context;
};
struct WebEngineCustomJobCallbackData final : public JS::JobCallback::CustomData {
WebEngineCustomJobCallbackData(HTML::EnvironmentSettingsObject& incumbent_settings, OwnPtr<JS::ExecutionContext> active_script_context)
: incumbent_settings(incumbent_settings)
, active_script_context(move(active_script_context))
{
}
virtual ~WebEngineCustomJobCallbackData() override = default;
HTML::EnvironmentSettingsObject& incumbent_settings;
OwnPtr<JS::ExecutionContext> active_script_context;
};
HTML::ClassicScript* active_script();
JS::VM& main_thread_vm();
void queue_mutation_observer_microtask(DOM::Document&);
}