TransactionItem.h - mozsearch

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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 TransactionItem_h

#define TransactionItem_h

#include "nsCOMPtr.h"

#include "nsCOMArray.h"

#include "nsCycleCollectionParticipant.h"

#include "nsISupportsImpl.h"

#include "nscore.h"

class nsITransaction;

namespace mozilla {

class TransactionManager;

class TransactionStack;

class TransactionItem final {

 public:

  explicit TransactionItem(nsITransaction* aTransaction);

  NS_METHOD_(MozExternalRefCountType) AddRef();

  NS_METHOD_(MozExternalRefCountType) Release();

  NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(TransactionItem)

  nsresult AddChild(TransactionItem& aTransactionItem);

  already_AddRefed<nsITransaction> GetTransaction();

  size_t NumberOfChildren() const {

    return NumberOfUndoItems() + NumberOfRedoItems();

  nsresult GetChild(size_t aIndex, TransactionItem** aChild);

  MOZ_CAN_RUN_SCRIPT nsresult DoTransaction();

  MOZ_CAN_RUN_SCRIPT nsresult

  UndoTransaction(TransactionManager* aTransactionManager);

  MOZ_CAN_RUN_SCRIPT nsresult

  RedoTransaction(TransactionManager* aTransactionManager);

  nsCOMArray<nsISupports>& GetData() { return mData; }

 private:

  MOZ_CAN_RUN_SCRIPT nsresult

  UndoChildren(TransactionManager* aTransactionManager);

  MOZ_CAN_RUN_SCRIPT nsresult

  RedoChildren(TransactionManager* aTransactionManager);

  MOZ_CAN_RUN_SCRIPT nsresult

  RecoverFromUndoError(TransactionManager* aTransactionManager);

  MOZ_CAN_RUN_SCRIPT nsresult

  RecoverFromRedoError(TransactionManager* aTransactionManager);

  size_t NumberOfUndoItems() const;

  size_t NumberOfRedoItems() const;

  void CleanUp();

  ~TransactionItem();

  nsCycleCollectingAutoRefCnt mRefCnt;

  NS_DECL_OWNINGTHREAD

  nsCOMArray<nsISupports> mData;

  nsCOMPtr<nsITransaction> mTransaction;

  TransactionStack* mUndoStack;

  TransactionStack* mRedoStack;

};

}  // namespace mozilla

#endif  // #ifndef TransactionItem_h