gecko-dev/editor/libeditor/base/EditTxn.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#ifndef EditTxn_h__
#define EditTxn_h__

#include "nsITransaction.h"
#include "nsIOutputStream.h"
#include "nsString.h"
#include "nsCOMPtr.h"
#include "nsPIEditorTransaction.h"

#define EDIT_TXN_CID \
{/* c5ea31b0-ac48-11d2-86d8-000064657374 */ \
0xc5ea31b0, 0xac48, 0x11d2, \
{0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }

/**
 * base class for all document editing transactions.
 * provides default concrete behavior for all nsITransaction methods.
 * EditTxns optionally have a name.  This name is for internal purposes only, 
 * it is never seen by the user or by any external entity.
 */
class EditTxn : public nsITransaction
              , public nsPIEditorTransaction
{
public:

  static const nsIID& GetCID() { static const nsIID iid = EDIT_TXN_CID; return iid; }

  NS_DECL_ISUPPORTS

  EditTxn();
  virtual ~EditTxn();


  NS_IMETHOD DoTransaction(void);

  NS_IMETHOD UndoTransaction(void);

  NS_IMETHOD RedoTransaction(void);

  NS_IMETHOD GetIsTransient(PRBool *aIsTransient);

  NS_IMETHOD Merge(nsITransaction *aTransaction, PRBool *aDidMerge);

  NS_IMETHOD GetTxnDescription(nsAString& aTxnDescription);
};

#endif