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/* -*- 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/. */

#ifndef EditAggregateTransaction_h
#define EditAggregateTransaction_h

#include "mozilla/EditTransactionBase.h"
#include "mozilla/OwningNonNull.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsAtom.h"
#include "nsISupportsImpl.h"
#include "nsTArray.h"
#include "nscore.h"

class nsITransaction;

namespace mozilla {

/**
 * base class for all document editing transactions that require aggregation.
 * provides a list of child transactions.
 */
class EditAggregateTransaction : public EditTransactionBase {
 protected:
  EditAggregateTransaction() = default;

 public:
  /**
   * Creates an edit aggregate transaction.  This never returns nullptr.
   */
  static already_AddRefed<EditAggregateTransaction> Create() {
    RefPtr<EditAggregateTransaction> transaction =
        new EditAggregateTransaction();
    return transaction.forget();
  }

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(EditAggregateTransaction,
                                           EditTransactionBase)

  NS_DECL_EDITTRANSACTIONBASE

  NS_IMETHOD RedoTransaction() override;
  NS_IMETHOD Merge(nsITransaction* aTransaction, bool* aDidMerge) override;

  /**
   * Append a transaction to this aggregate.
   */
  NS_IMETHOD AppendChild(EditTransactionBase* aTransaction);

  /**
   * Get the name assigned to this transaction.
   */
  NS_IMETHOD GetName(nsAtom** aName);

 protected:
  virtual ~EditAggregateTransaction() = default;

  nsTArray<OwningNonNull<EditTransactionBase>> mChildren;
  RefPtr<nsAtom> mName;
};

}  // namespace mozilla

#endif  // #ifndef EditAggregateTransaction_h