/* -*- 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/. */

#ifndef mozilla_MutationEvent_h__

#define mozilla_MutationEvent_h__

#include "mozilla/BasicEvents.h"

#include "nsCOMPtr.h"

#include "nsAtom.h"

#include "nsINode.h"

namespace mozilla {

class InternalMutationEvent : public WidgetEvent

{

public:

  virtual InternalMutationEvent* AsMutationEvent() override { return this; }

  InternalMutationEvent(bool aIsTrusted, EventMessage aMessage)

    : WidgetEvent(aIsTrusted, aMessage, eMutationEventClass)

    , mAttrChange(0)

  {

    mFlags.mCancelable = false;

  }

  virtual WidgetEvent* Duplicate() const override

  {

    MOZ_ASSERT(mClass == eMutationEventClass,

               "Duplicate() must be overridden by sub class");

    InternalMutationEvent* result = new InternalMutationEvent(false, mMessage);

    result->AssignMutationEventData(*this, true);

    result->mFlags = mFlags;

    return result;

  }

  nsCOMPtr<nsINode> mRelatedNode;

  RefPtr<nsAtom>    mAttrName;

  RefPtr<nsAtom>    mPrevAttrValue;

  RefPtr<nsAtom>    mNewAttrValue;

  unsigned short       mAttrChange;

  void AssignMutationEventData(const InternalMutationEvent& aEvent,

                               bool aCopyTargets)

  {

    AssignEventData(aEvent, aCopyTargets);

    mRelatedNode = aEvent.mRelatedNode;

    mAttrName = aEvent.mAttrName;

    mPrevAttrValue = aEvent.mPrevAttrValue;

    mNewAttrValue = aEvent.mNewAttrValue;

    mAttrChange = aEvent.mAttrChange;

  }

};

// Bits are actually checked to optimize mutation event firing.

// That's why I don't number from 0x00.  The first event should

// always be 0x01.

#define NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED                0x01

#define NS_EVENT_BITS_MUTATION_NODEINSERTED                   0x02

#define NS_EVENT_BITS_MUTATION_NODEREMOVED                    0x04

#define NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT        0x08

#define NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT       0x10

#define NS_EVENT_BITS_MUTATION_ATTRMODIFIED                   0x20

#define NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED          0x40

} // namespace mozilla

#endif // mozilla_MutationEvent_h__