Quelle Timeout.cpp Sprache: C

/* -*- 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 "Timeout.h"

#include "mozilla/dom/TimeoutManager.h"
#include "GeckoProfiler.h"

namespace mozilla::dom {

Timeout::Timeout()
    : mTimeoutId(0),
      mFiringId(TimeoutManager::InvalidFiringId),
#ifdef DEBUG
      mFiringIndex(-1),
#endif
      mPopupState(PopupBlocker::openAllowed),
      mReason(Reason::eTimeoutOrInterval),
      mNestingLevel(0),
      mCleared(false),
      mRunning(false),
      mIsInterval(false) {
}

NS_IMPL_CYCLE_COLLECTION_CLASS(Timeout)

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Timeout)
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobal)
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mScriptHandler)
  if (tmp->isInList()) {
    tmp->remove();
  }
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Timeout)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobal)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mScriptHandler)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

void Timeout::SetWhenOrTimeRemaining(const TimeStamp& aBaseTime,
                                     const TimeDuration& aDelay) {
  MOZ_DIAGNOSTIC_ASSERT(mGlobal);
  mSubmitTime = aBaseTime;

  mSubmitTime = aBaseTime;
  if (profiler_is_active()) {
    mCause = profiler_capture_backtrace();
  }

  // If we are frozen simply set mTimeRemaining to be the "time remaining" in
  // the timeout (i.e., the interval itself).  This will be used to create a
  // new mWhen time when the window is thawed.  The end effect is that time does
  // not appear to pass for frozen windows.
  if (mGlobal->IsFrozen()) {
    mWhen = TimeStamp();
    mTimeRemaining = aDelay;
    return;
  }

  // Since we are not frozen we must set a precise mWhen target wakeup
  // time.  Even if we are suspended we want to use this target time so
  // that it appears time passes while suspended.
  mWhen = aBaseTime + aDelay;
  mTimeRemaining = TimeDuration(0);
}

const TimeStamp& Timeout::When() const {
  MOZ_DIAGNOSTIC_ASSERT(!mWhen.IsNull());
  // Note, mGlobal->IsFrozen() can be true here.  The Freeze() method calls
  // When() to calculate the delay to populate mTimeRemaining.
  return mWhen;
}

const TimeStamp& Timeout::SubmitTime() const { return mSubmitTime; }

const TimeDuration& Timeout::TimeRemaining() const {
  MOZ_DIAGNOSTIC_ASSERT(mWhen.IsNull());
  // Note, mGlobal->IsFrozen() can be false here.  The Thaw() method calls
  // TimeRemaining() to calculate the new When() value.
  return mTimeRemaining;
}

}  // namespace mozilla::dom

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