/* -*- 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 "nsISVGPoint.h"

#include "DOMSVGPointList.h"

#include "SVGPoint.h"

#include "nsSVGElement.h"

#include "nsError.h"

#include "mozilla/dom/SVGPointBinding.h"

// See the architecture comment in DOMSVGPointList.h.

using namespace mozilla;

// We could use NS_IMPL_CYCLE_COLLECTION(, except that in Unlink() we need to

// clear our list's weak ref to us to be safe. (The other option would be to

// not unlink and rely on the breaking of the other edges in the cycle, as

// NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)

NS_IMPL_CYCLE_COLLECTION_CLASS(nsISVGPoint)

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsISVGPoint)

  // We may not belong to a list, so we must null check tmp->mList.

  if (tmp->mList) {

    tmp->mList->mItems[tmp->mListIndex] = nullptr;

  }

NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)

NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER

NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsISVGPoint)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsISVGPoint)

NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER

NS_IMPL_CYCLE_COLLECTION_TRACE_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(nsISVGPoint)

NS_IMPL_CYCLE_COLLECTING_RELEASE(nsISVGPoint)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsISVGPoint)

  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY

  NS_INTERFACE_MAP_ENTRY(nsISVGPoint)

  NS_INTERFACE_MAP_ENTRY(nsISupports)

NS_INTERFACE_MAP_END

void

nsISVGPoint::InsertingIntoList(DOMSVGPointList *aList,

                               uint32_t aListIndex,

                               bool aIsAnimValItem)

{

  MOZ_ASSERT(!HasOwner(), "Inserting item that already has an owner");

  mList = aList;

  mListIndex = aListIndex;

  mIsReadonly = false;

  mIsAnimValItem = aIsAnimValItem;

  MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPoint!");

}

void

nsISVGPoint::RemovingFromList()

{

  mPt = InternalItem();

  mList = nullptr;

  MOZ_ASSERT(!mIsReadonly, "mIsReadonly set for list");

  mIsAnimValItem = false;

}

SVGPoint&

nsISVGPoint::InternalItem()

{

  return mList->InternalList().mItems[mListIndex];

}

#ifdef DEBUG

bool

nsISVGPoint::IndexIsValid()

{

  return mListIndex < mList->InternalList().Length();

}

#endif