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