editor/txmgr/src/nsTransactionItem.h
author Gregory Szorc <gps@mozilla.com>
Wed, 28 Jan 2015 13:37:00 -0800
branch14_0_Beta_Hedge
changeset 120293 5b81998bb7ab5aade597584417ea90b0995c586e
parent 91039 7546dd13db9dfa9a7d78ffb9797d7be3917067f3
child 98529 f4157e8c410708d76703f19e4dfb61859bfe32d8
child 112238 b56f0dfbc628d99d899225cfb73543f78f6d2bf2
permissions -rw-r--r--
Close old branch 14_0_Beta_Hedge

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is
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#ifndef nsTransactionItem_h__
#define nsTransactionItem_h__

#include "nsITransaction.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"

class nsTransactionStack;
class nsTransactionManager;

class nsTransactionItem
{
  nsCOMPtr<nsITransaction> mTransaction;
  nsTransactionStack      *mUndoStack;
  nsTransactionStack      *mRedoStack;
  nsAutoRefCnt             mRefCnt;

public:

  nsTransactionItem(nsITransaction *aTransaction);
  virtual ~nsTransactionItem();
  nsrefcnt AddRef();
  nsrefcnt Release();

  NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(nsTransactionItem)

  virtual nsresult AddChild(nsTransactionItem *aTransactionItem);
  virtual nsresult GetTransaction(nsITransaction **aTransaction);
  virtual nsresult GetIsBatch(bool *aIsBatch);
  virtual nsresult GetNumberOfChildren(PRInt32 *aNumChildren);
  virtual nsresult GetChild(PRInt32 aIndex, nsTransactionItem **aChild);

  virtual nsresult DoTransaction(void);
  virtual nsresult UndoTransaction(nsTransactionManager *aTxMgr);
  virtual nsresult RedoTransaction(nsTransactionManager *aTxMgr);

private:

  virtual nsresult UndoChildren(nsTransactionManager *aTxMgr);
  virtual nsresult RedoChildren(nsTransactionManager *aTxMgr);

  virtual nsresult RecoverFromUndoError(nsTransactionManager *aTxMgr);
  virtual nsresult RecoverFromRedoError(nsTransactionManager *aTxMgr);

  virtual nsresult GetNumberOfUndoItems(PRInt32 *aNumItems);
  virtual nsresult GetNumberOfRedoItems(PRInt32 *aNumItems);
};

#endif // nsTransactionItem_h__