tor-browser

The Tor Browser
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TransactionItem.h (2133B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef TransactionItem_h
      7 #define TransactionItem_h
      8 
      9 #include "nsCOMPtr.h"
     10 #include "nsCOMArray.h"
     11 #include "nsCycleCollectionParticipant.h"
     12 #include "nsISupportsImpl.h"
     13 #include "nscore.h"
     14 
     15 class nsITransaction;
     16 
     17 namespace mozilla {
     18 
     19 class TransactionManager;
     20 class TransactionStack;
     21 
     22 class TransactionItem final {
     23 public:
     24  explicit TransactionItem(nsITransaction* aTransaction);
     25  NS_METHOD_(MozExternalRefCountType) AddRef();
     26  NS_METHOD_(MozExternalRefCountType) Release();
     27 
     28  NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(TransactionItem)
     29 
     30  nsresult AddChild(TransactionItem& aTransactionItem);
     31  already_AddRefed<nsITransaction> GetTransaction();
     32  size_t NumberOfChildren() const {
     33    return NumberOfUndoItems() + NumberOfRedoItems();
     34  }
     35  nsresult GetChild(size_t aIndex, TransactionItem** aChild);
     36 
     37  MOZ_CAN_RUN_SCRIPT nsresult DoTransaction();
     38  MOZ_CAN_RUN_SCRIPT nsresult
     39  UndoTransaction(TransactionManager* aTransactionManager);
     40  MOZ_CAN_RUN_SCRIPT nsresult
     41  RedoTransaction(TransactionManager* aTransactionManager);
     42 
     43  nsCOMArray<nsISupports>& GetData() { return mData; }
     44 
     45 private:
     46  MOZ_CAN_RUN_SCRIPT nsresult
     47  UndoChildren(TransactionManager* aTransactionManager);
     48  MOZ_CAN_RUN_SCRIPT nsresult
     49  RedoChildren(TransactionManager* aTransactionManager);
     50 
     51  MOZ_CAN_RUN_SCRIPT nsresult
     52  RecoverFromUndoError(TransactionManager* aTransactionManager);
     53  MOZ_CAN_RUN_SCRIPT nsresult
     54  RecoverFromRedoError(TransactionManager* aTransactionManager);
     55 
     56  size_t NumberOfUndoItems() const;
     57  size_t NumberOfRedoItems() const;
     58 
     59  void CleanUp();
     60 
     61  ~TransactionItem();
     62 
     63  nsCycleCollectingAutoRefCnt mRefCnt;
     64  NS_DECL_OWNINGTHREAD
     65 
     66  nsCOMArray<nsISupports> mData;
     67  nsCOMPtr<nsITransaction> mTransaction;
     68  TransactionStack* mUndoStack;
     69  TransactionStack* mRedoStack;
     70 };
     71 
     72 }  // namespace mozilla
     73 
     74 #endif  // #ifndef TransactionItem_h