/* -*- 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 "FetchObserver.h"

#include "mozilla/dom/Event.h"

namespace mozilla {

namespace dom {

NS_IMPL_CYCLE_COLLECTION_CLASS(FetchObserver)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(FetchObserver,

                                                  DOMEventTargetHelper)

  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFollowingSignal)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(FetchObserver,

                                                DOMEventTargetHelper)

  tmp->Unfollow();

NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FetchObserver)

NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)

NS_IMPL_ADDREF_INHERITED(FetchObserver, DOMEventTargetHelper)

NS_IMPL_RELEASE_INHERITED(FetchObserver, DOMEventTargetHelper)

FetchObserver::FetchObserver(nsIGlobalObject* aGlobal,

                             AbortSignalImpl* aSignalImpl)

  : DOMEventTargetHelper(aGlobal)

  , mState(FetchState::Requesting)

{

  if (aSignalImpl) {

    Follow(aSignalImpl);

  }

}

JSObject*

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

{

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

}

FetchState

FetchObserver::State() const

{

  return mState;

}

void

FetchObserver::Abort()

{

  SetState(FetchState::Aborted);

}

void

FetchObserver::SetState(FetchState aState)

{

  MOZ_ASSERT(mState < aState);

  if (mState == FetchState::Aborted ||

      mState == FetchState::Errored ||

      mState == FetchState::Complete) {

    // We are already in a final state.

    return;

  }

  // We cannot pass from Requesting to Complete directly.

  if (mState == FetchState::Requesting &&

      aState == FetchState::Complete) {

    SetState(FetchState::Responding);

  }

  mState = aState;

  if (mState == FetchState::Aborted ||

      mState == FetchState::Errored ||

      mState == FetchState::Complete) {

    Unfollow();

  }

  EventInit init;

  init.mBubbles = false;

  init.mCancelable = false;

  // TODO which kind of event should we dispatch here?

  RefPtr<Event> event =

    Event::Constructor(this, NS_LITERAL_STRING("statechange"), init);

  event->SetTrusted(true);

  DispatchEvent(*event);

}

} // dom namespace

} // mozilla namespace