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#pragma once
8
9#include <LibCore/ElapsedTimer.h>
10#include <LibWeb/DOM/EventTarget.h>
11
12namespace Web::HighResolutionTime {
13
14class Performance final : public DOM::EventTarget {
15 WEB_PLATFORM_OBJECT(Performance, DOM::EventTarget);
16
17public:
18 virtual ~Performance() override;
19
20 double now() const { return static_cast<double>(m_timer.elapsed()); }
21 double time_origin() const;
22
23 JS::GCPtr<NavigationTiming::PerformanceTiming> timing();
24
25private:
26 explicit Performance(HTML::Window&);
27
28 virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
29 virtual void visit_edges(Cell::Visitor&) override;
30
31 JS::NonnullGCPtr<HTML::Window> m_window;
32 JS::GCPtr<NavigationTiming::PerformanceTiming> m_timing;
33
34 Core::ElapsedTimer m_timer;
35};
36
37}