InternalMutationEvent.h

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/* -*- 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,

                        const WidgetEventTime* aTime = nullptr)

      : WidgetEvent(aIsTrusted, aMessage, eMutationEventClass, aTime),

        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, this);

    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

#define NS_EVENT_BITS_MUTATION_ALL                                            \

  (NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED |                                   \

   NS_EVENT_BITS_MUTATION_NODEINSERTED | NS_EVENT_BITS_MUTATION_NODEREMOVED | \

   NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT |                           \

   NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT |                          \

   NS_EVENT_BITS_MUTATION_ATTRMODIFIED |                                      \

   NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED)

}  // namespace mozilla

#endif  // mozilla_MutationEvent_h__