Performance.h 883 B

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  1. /*
  2. * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
  3. *
  4. * SPDX-License-Identifier: BSD-2-Clause
  5. */
  6. #pragma once
  7. #include <LibCore/ElapsedTimer.h>
  8. #include <LibWeb/DOM/EventTarget.h>
  9. namespace Web::HighResolutionTime {
  10. class Performance final : public DOM::EventTarget {
  11. WEB_PLATFORM_OBJECT(Performance, DOM::EventTarget);
  12. public:
  13. virtual ~Performance() override;
  14. double now() const { return static_cast<double>(m_timer.elapsed()); }
  15. double time_origin() const;
  16. JS::GCPtr<NavigationTiming::PerformanceTiming> timing();
  17. private:
  18. explicit Performance(HTML::Window&);
  19. virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
  20. virtual void visit_edges(Cell::Visitor&) override;
  21. JS::NonnullGCPtr<HTML::Window> m_window;
  22. JS::GCPtr<NavigationTiming::PerformanceTiming> m_timing;
  23. Core::ElapsedTimer m_timer;
  24. };
  25. }