/* -*- 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/. */

#include <algorithm>

#include "mozilla/dom/IdleDeadline.h"

#include "mozilla/dom/IdleDeadlineBinding.h"

#include "mozilla/dom/Performance.h"

#include "nsCOMPtr.h"

#include "nsCycleCollectionParticipant.h"

#include "nsDOMNavigationTiming.h"

#include "nsPIDOMWindow.h"

namespace mozilla {

namespace dom {

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(IdleDeadline, mWindow, mGlobal)

NS_IMPL_CYCLE_COLLECTING_ADDREF(IdleDeadline)

NS_IMPL_CYCLE_COLLECTING_RELEASE(IdleDeadline)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IdleDeadline)

  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY

  NS_INTERFACE_MAP_ENTRY(nsISupports)

NS_INTERFACE_MAP_END

IdleDeadline::IdleDeadline(nsPIDOMWindowInner* aWindow, bool aDidTimeout,

                           DOMHighResTimeStamp aDeadline)

  : mWindow(aWindow)

  , mDidTimeout(aDidTimeout)

  , mDeadline(aDeadline)

{

  bool hasHadSHO;

  mGlobal = aWindow->GetDoc()->GetScriptHandlingObject(hasHadSHO);

}

IdleDeadline::IdleDeadline(nsIGlobalObject* aGlobal, bool aDidTimeout,

                           DOMHighResTimeStamp aDeadline)

  : mWindow(nullptr)

  , mGlobal(aGlobal)

  , mDidTimeout(aDidTimeout)

  , mDeadline(aDeadline)

{

}

IdleDeadline::~IdleDeadline()

{

}

JSObject*

IdleDeadline::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

{

  return IdleDeadline_Binding::Wrap(aCx, this, aGivenProto);

}

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;

    }

    return std::max(mDeadline - performance->Now(), 0.0);

  }

  // 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);

}

bool

IdleDeadline::DidTimeout() const

{

  return mDidTimeout;

}

} // namespace dom

} // namespace mozilla