/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 et tw=78: */

/* 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 "mozilla/dom/HTMLMediaElement.h"

#include "mozilla/dom/VideoStreamTrack.h"

#include "mozilla/dom/VideoTrack.h"

#include "mozilla/dom/VideoTrackBinding.h"

#include "mozilla/dom/VideoTrackList.h"

namespace mozilla {

namespace dom {

VideoTrack::VideoTrack(nsIGlobalObject* aOwnerGlobal,

                       const nsAString& aId,

                       const nsAString& aKind,

                       const nsAString& aLabel,

                       const nsAString& aLanguage,

                       VideoStreamTrack* aStreamTarck)

  : MediaTrack(aOwnerGlobal, aId, aKind, aLabel, aLanguage)

  , mSelected(false)

  , mVideoStreamTrack(aStreamTarck)

{

}

VideoTrack::~VideoTrack()

{

}

NS_IMPL_CYCLE_COLLECTION_INHERITED(VideoTrack, MediaTrack, mVideoStreamTrack)

NS_IMPL_ADDREF_INHERITED(VideoTrack, MediaTrack)

NS_IMPL_RELEASE_INHERITED(VideoTrack, MediaTrack)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(VideoTrack)

NS_INTERFACE_MAP_END_INHERITING(MediaTrack)

JSObject*

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

{

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

}

void VideoTrack::SetSelected(bool aSelected)

{

  SetEnabledInternal(aSelected, MediaTrack::DEFAULT);

}

void

VideoTrack::SetEnabledInternal(bool aEnabled, int aFlags)

{

  if (aEnabled == mSelected) {

    return;

  }

  mSelected = aEnabled;

  // If this VideoTrack is no longer in its original VideoTrackList, then

  // whether it is selected or not has no effect on its original list.

  if (!mList) {

    return;

  }

  VideoTrackList& list = static_cast<VideoTrackList&>(*mList);

  if (mSelected) {

    uint32_t curIndex = 0;

    // Unselect all video tracks except the current one.

    for (uint32_t i = 0; i < list.Length(); ++i) {

      if (list[i] == this) {

        curIndex = i;

        continue;

      }

      VideoTrack* track = list[i];

      track->SetSelected(false);

    }

    // Set the index of selected video track to the current's index.

    list.mSelectedIndex = curIndex;

    HTMLMediaElement* element = mList->GetMediaElement();

    if (element) {

      element->NotifyMediaTrackEnabled(this);

    }

  } else {

    list.mSelectedIndex = -1;

    HTMLMediaElement* element = mList->GetMediaElement();

    if (element) {

      element->NotifyMediaTrackDisabled(this);

    }

  }

  // Fire the change event at selection changes on this video track, shall

  // propose a spec change later.

  if (!(aFlags & MediaTrack::FIRE_NO_EVENTS)) {

    list.CreateAndDispatchChangeEvent();

  }

}

} // namespace dom

} //namespace mozilla