/* -*- Mode: C++; tab-width: 2; 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 "mozilla/dom/HTMLTrackElement.h"
#include "mozilla/dom/TextTrackCue.h"
#include "mozilla/dom/TextTrackCueBinding.h"
#include "webvtt/cue.h"

namespace mozilla {
namespace dom {

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_3(TextTrackCue,
                                        mGlobal,
                                        mTrack,
                                        mTrackElement)

NS_IMPL_ADDREF_INHERITED(TextTrackCue, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(TextTrackCue, nsDOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TextTrackCue)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)

// Set cue setting defaults based on step 19 & seq.
// in http://dev.w3.org/html5/webvtt/#parsing
void
TextTrackCue::SetDefaultCueSettings()
{
  mPosition = 50;
  mSize = 100;
  mPauseOnExit = false;
  mSnapToLines = true;
  mLine = WEBVTT_AUTO;
  mAlign = TextTrackCueAlign::Middle;
}

TextTrackCue::TextTrackCue(nsISupports* aGlobal,
                           double aStartTime,
                           double aEndTime,
                           const nsAString& aText)
  : mGlobal(aGlobal)
  , mText(aText)
  , mStartTime(aStartTime)
  , mEndTime(aEndTime)
  , mHead(nullptr)
{
  SetDefaultCueSettings();
  MOZ_ASSERT(aGlobal);
  SetIsDOMBinding();
}

TextTrackCue::TextTrackCue(nsISupports* aGlobal,
                           double aStartTime,
                           double aEndTime,
                           const nsAString& aText,
                           HTMLTrackElement* aTrackElement,
                           webvtt_node* head)
  : mGlobal(aGlobal)
  , mText(aText)
  , mStartTime(aStartTime)
  , mEndTime(aEndTime)
  , mTrackElement(aTrackElement)
  , mHead(head)
{
  // Use the webvtt library's reference counting.
  webvtt_ref_node(mHead);
  SetDefaultCueSettings();
  MOZ_ASSERT(aGlobal);
  SetIsDOMBinding();
}

TextTrackCue::~TextTrackCue()
{
  if (mHead) {
    // Release our reference and null mHead.
    webvtt_release_node(&mHead);
  }
}

void
TextTrackCue::DisplayCue()
{
  if (mTrackElement) {
    mTrackElement->DisplayCueText(mHead);
  }
}

JSObject*
TextTrackCue::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
{
  return TextTrackCueBinding::Wrap(aCx, aScope, this);
}

void
TextTrackCue::CueChanged()
{
  if (mTrack) {
    mTrack->CueChanged(*this);
  }
}
} // namespace dom
} // namespace mozilla