/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "PerformanceMeasure.h"
#include "MainThreadUtils.h"
#include "mozilla/HoldDropJSObjects.h"
#include "mozilla/dom/PerformanceMeasureBinding.h"

using namespace mozilla::dom;

PerformanceMeasure::PerformanceMeasure(nsISupports* aParent,
                                       const nsAString& aName,
                                       DOMHighResTimeStamp aStartTime,
                                       DOMHighResTimeStamp aEndTime,
                                       const JS::Handle<JS::Value>& aDetail)
  : PerformanceEntry(aParent, aName, NS_LITERAL_STRING("measure"))
  , mStartTime(aStartTime)
  , mDuration(aEndTime - aStartTime)
  , mDetail(aDetail)
{
  // mParent is null in workers.
  MOZ_ASSERT(mParent || !NS_IsMainThread());
}

PerformanceMeasure::~PerformanceMeasure()
{
  mozilla::DropJSObjects(this);
}

NS_IMPL_CYCLE_COLLECTION_CLASS(PerformanceMeasure)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PerformanceMeasure,
                                                PerformanceEntry)
  tmp->mDetail.setUndefined();
  mozilla::DropJSObjects(tmp);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PerformanceMeasure,
                                                  PerformanceEntry)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(PerformanceMeasure,
                                               PerformanceEntry)
  NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDetail)
NS_IMPL_CYCLE_COLLECTION_TRACE_END

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PerformanceMeasure)
NS_INTERFACE_MAP_END_INHERITING(PerformanceEntry)
NS_IMPL_ADDREF_INHERITED(PerformanceMeasure, PerformanceEntry)
NS_IMPL_RELEASE_INHERITED(PerformanceMeasure, PerformanceEntry)

JSObject*
PerformanceMeasure::WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto)
{
  return PerformanceMeasureBinding::Wrap(aCx, this, aGivenProto);
}

void
PerformanceMeasure::GetDetail(JSContext* aCx,
                              JS::MutableHandle<JS::Value> aRv)
{
  // Return a copy so that this method always returns the value it is set to
  // (i.e. it'll return the same value even if the caller assigns to it). Note
  // that if detail is an object, its contents can be mutated and this is
  // expected.
  aRv.set(mDetail);
}