1 files changed, 66 insertions, 0 deletions
diff --git a/mailnews/base/util/nsMsgReadStateTxn.cpp b/mailnews/base/util/nsMsgReadStateTxn.cpp
new file mode 100644
index 000000000..68524e960
--- /dev/null
+++ b/mailnews/base/util/nsMsgReadStateTxn.cpp
@@ -0,0 +1,66 @@
+/* -*- 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/. */
+
+#include "nsMsgReadStateTxn.h"
+
+#include "nsIMutableArray.h"
+#include "nsIMsgHdr.h"
+#include "nsComponentManagerUtils.h"
+
+
+nsMsgReadStateTxn::nsMsgReadStateTxn()
+{
+}
+
+nsMsgReadStateTxn::~nsMsgReadStateTxn()
+{
+}
+
+nsresult
+nsMsgReadStateTxn::Init(nsIMsgFolder *aParentFolder,
+                        uint32_t aNumKeys,
+                        nsMsgKey *aMsgKeyArray)
+{
+  NS_ENSURE_ARG_POINTER(aParentFolder);
+
+  mParentFolder = aParentFolder;
+  mMarkedMessages.AppendElements(aMsgKeyArray, aNumKeys);
+
+  return nsMsgTxn::Init();
+}
+
+NS_IMETHODIMP 
+nsMsgReadStateTxn::UndoTransaction()
+{
+  return MarkMessages(false);
+}
+
+NS_IMETHODIMP 
+nsMsgReadStateTxn::RedoTransaction()
+{
+  return MarkMessages(true);
+}
+
+NS_IMETHODIMP
+nsMsgReadStateTxn::MarkMessages(bool aAsRead)
+{
+  nsresult rv;
+  nsCOMPtr<nsIMutableArray> messageArray = 
+    do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  uint32_t length = mMarkedMessages.Length();
+  for (uint32_t i = 0; i < length; i++) {
+    nsCOMPtr<nsIMsgDBHdr> curMsgHdr;
+    rv = mParentFolder->GetMessageHeader(mMarkedMessages[i], 
+                                         getter_AddRefs(curMsgHdr));
+    if (NS_SUCCEEDED(rv) && curMsgHdr) {
+      messageArray->AppendElement(curMsgHdr, false);
+    }
+  }
+
+  return mParentFolder->MarkMessagesRead(messageArray, aAsRead);
+}
+