/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
DOMHighResTimeStamp IdleDeadline::TimeRemaining() { if (mDidTimeout) { return 0.0;
}
if (mWindow) {
RefPtr<Performance> performance = mWindow->GetPerformance(); if (!performance) { // If there is no performance object the window is partially torn // down, so we can safely say that there is no time remaining. return 0.0;
}
// The web API doesn't expect deadlines > 50ms, but conversion from the // internal API may lead to some rounding errors. return std::clamp(mDeadline - performance->Now(), 0.0, 50.0);
}
// If there's no window, we're in a system scope, and can just use // a high-resolution TimeStamp::Now(); auto timestamp = TimeStamp::Now() - TimeStamp::ProcessCreation(); return std::max(mDeadline - timestamp.ToMilliseconds(), 0.0);
}
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