gecko-dev/mailnews/base/util/nsMsgTxn.cpp

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#include "nsMsgTxn.h"
#include "nsIMsgHdr.h"
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);

NS_IMPL_THREADSAFE_ADDREF(nsMsgTxn)
NS_IMPL_THREADSAFE_RELEASE(nsMsgTxn)
NS_IMPL_THREADSAFE_QUERY_INTERFACE1(nsMsgTxn, nsITransaction)

// note that aEditor is not refcounted
nsMsgTxn::nsMsgTxn() 
{
  m_txnType = 0;
}

nsMsgTxn::~nsMsgTxn()
{
}

NS_IMETHODIMP nsMsgTxn::DoTransaction(void)
{
  return NS_OK;
}

NS_IMETHODIMP nsMsgTxn::GetIsTransient(PRBool *aIsTransient)
{
  if (nsnull!=aIsTransient)
    *aIsTransient = PR_FALSE;
  else
	  return NS_ERROR_NULL_POINTER;
  return NS_OK;
}

NS_IMETHODIMP nsMsgTxn::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}


NS_IMETHODIMP nsMsgTxn::GetMsgWindow(nsIMsgWindow **msgWindow)
{
    if (!msgWindow || !m_msgWindow)
        return NS_ERROR_NULL_POINTER;
    *msgWindow = m_msgWindow;
    NS_ADDREF (*msgWindow);
    return NS_OK;
}

NS_IMETHODIMP nsMsgTxn::SetMsgWindow(nsIMsgWindow *msgWindow)
{
    m_msgWindow = msgWindow;
    return NS_OK;
}

NS_IMETHODIMP 
nsMsgTxn::GetTransactionType(PRUint32 *txnType)
{
    if (!txnType) 
        return NS_ERROR_NULL_POINTER;
    *txnType = m_txnType;
    return NS_OK;
}

NS_IMETHODIMP
nsMsgTxn::SetTransactionType(PRUint32 txnType)
{
    m_txnType = txnType;
    return NS_OK;
}

/*none of the callers pass null aFolder, 
  we always initialize aResult (before we pass in) for the case where the key is not in the db*/
nsresult 
nsMsgTxn::CheckForToggleDelete(nsIMsgFolder *aFolder, const nsMsgKey &aMsgKey, PRBool *aResult)
{
  NS_ENSURE_ARG(aResult);
  nsCOMPtr<nsIMsgDBHdr> message;
  nsCOMPtr<nsIMsgDatabase> db;
  nsresult rv = aFolder->GetMsgDatabase(nsnull,getter_AddRefs(db));
  if (db)
  {
    PRBool containsKey;
    rv = db->ContainsKey(aMsgKey, &containsKey);
    if (NS_FAILED(rv) || !containsKey)   // the message has been deleted from db, so we cannot do toggle here
      return NS_OK;
    rv = db->GetMsgHdrForKey(aMsgKey, getter_AddRefs(message));
    PRUint32 flags;
    if (NS_SUCCEEDED(rv) && message)
    {
      message->GetFlags(&flags);
      *aResult = (flags & MSG_FLAG_IMAP_DELETED) != 0;
    }
  }
  return rv;
}