jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibWeb/DOM/Document.h>
8#include <LibWeb/DOM/Event.h>
9#include <LibWeb/DOM/EventDispatcher.h>
10#include <LibWeb/HTML/Window.h>
11#include <LibWeb/HighResolutionTime/Performance.h>
12#include <LibWeb/NavigationTiming/PerformanceTiming.h>
13
14namespace Web::HighResolutionTime {
15
16Performance::Performance(HTML::Window& window)
17 : DOM::EventTarget(window.realm())
18 , m_window(window)
19{
20 m_timer.start();
21}
22
23Performance::~Performance() = default;
24
25JS::ThrowCompletionOr<void> Performance::initialize(JS::Realm& realm)
26{
27 MUST_OR_THROW_OOM(Base::initialize(realm));
28 set_prototype(&Bindings::ensure_web_prototype<Bindings::PerformancePrototype>(realm, "Performance"));
29
30 return {};
31}
32
33void Performance::visit_edges(Cell::Visitor& visitor)
34{
35 Base::visit_edges(visitor);
36 visitor.visit(m_window.ptr());
37 visitor.visit(m_timing.ptr());
38}
39
40JS::GCPtr<NavigationTiming::PerformanceTiming> Performance::timing()
41{
42 if (!m_timing)
43 m_timing = heap().allocate<NavigationTiming::PerformanceTiming>(realm(), *m_window).release_allocated_value_but_fixme_should_propagate_errors();
44 return m_timing;
45}
46
47double Performance::time_origin() const
48{
49 return static_cast<double>(m_timer.origin_time().to_milliseconds());
50}
51
52}