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47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/HTML/EventLoop/EventLoop.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/RequestIdleCallback/IdleDeadline.h>
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namespace Web::RequestIdleCallback {
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JS::NonnullGCPtr<IdleDeadline> IdleDeadline::create(HTML::Window& window, bool did_timeout)
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{
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return *window.heap().allocate<IdleDeadline>(window.realm(), window, did_timeout);
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}
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IdleDeadline::IdleDeadline(HTML::Window& window, bool did_timeout)
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: PlatformObject(window.realm())
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, m_did_timeout(did_timeout)
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{
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set_prototype(&window.cached_web_prototype("IdleDeadline"));
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}
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IdleDeadline::~IdleDeadline() = default;
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// https://w3c.github.io/requestidlecallback/#dom-idledeadline-timeremaining
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double IdleDeadline::time_remaining() const
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{
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auto const& event_loop = HTML::main_thread_event_loop();
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// 1. Let now be a DOMHighResTimeStamp representing current high resolution time in milliseconds.
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auto now = event_loop.unsafe_shared_current_time();
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// 2. Let deadline be the result of calling IdleDeadline's get deadline time algorithm.
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auto deadline = event_loop.compute_deadline();
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// 3. Let timeRemaining be deadline - now.
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auto time_remaining = deadline - now;
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// 4. If timeRemaining is negative, set it to 0.
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if (time_remaining < 0)
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time_remaining = 0;
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// 5. Return timeRemaining.
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// NOTE: coarsening to milliseconds
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return ceil(time_remaining);
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}
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}
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