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diff --git a/comm/mailnews/import/public/nsIImportMail.idl b/comm/mailnews/import/public/nsIImportMail.idl
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+++ b/comm/mailnews/import/public/nsIImportMail.idl
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+/*
+
+  Interface for importing mail - ui provided by the import module.  If
+  you wish to provide your own UI then implement the nsIImportGeneric
+  interface.
+
+*/
+
+/*
+  If you support this interface then the standard mailbox import UI
+  can be used to drive your import of mailboxes, which means you don't have
+  to worry about anything other than implementing this interface
+  (and nsIImportModule) to import mailboxes.
+*/
+
+/*
+  The general process is:
+  1) Do you know where the mail is located
+  2) Do you want the user to "verify" this location and have
+  the option of specifying a different mail directory?
+  3) Given a directory (either specified in 1 or 2) build a list
+  of all of the mailboxes to be imported.
+  4) Import each mail box to the destination provided!
+  5) Update the portion of the mailbox imported so far.  This should
+  always be less than the mailbox size until you are done.  This
+  is used for progress bar updating and MAY BE CALLED FROM ANOTHER
+  THREAD!
+
+*/
+
+#include "nsISupports.idl"
+
+interface nsIFile;
+interface nsIImportMailboxDescriptor;
+interface nsIMsgFolder;
+
+[scriptable, uuid(a14a3308-0849-420b-86d3-13a2948b5504)]
+interface nsIImportMail : nsISupports
+{
+  /*
+    If found and userVerify BOTH return false, then it is assumed that this
+    means an error - mail cannot be found on this machine.
+    If userVerify is true, the user will have an opportunity to specify
+    a different location to import mail from.
+  */
+  void GetDefaultLocation(out nsIFile location,
+                          out boolean found,
+                          out boolean userVerify);
+  /*
+    Returns an array which contains an nsIImportMailboxDescriptor for each
+    mailbox.  The array is not sorted before display to the user.
+  */
+  Array<nsIImportMailboxDescriptor> findMailboxes(in nsIFile location);
+
+  /*
+    Import a specific mailbox into the destination folder supplied.  If an error
+    occurs that is non-fatal, the destination will be deleted and other mailboxes
+    will be imported.  If a fatal error occurs, the destination will be deleted
+    and the import operation will abort.
+  */
+  void ImportMailbox(in nsIImportMailboxDescriptor source,
+                     in nsIMsgFolder dstFolder,
+                     out wstring errorLog,
+                     out wstring successLog,
+                     out boolean fatalError);
+
+  /*
+    Return the amount of the mailbox that has been imported so far.  This number
+    is used to present progress information and must never be larger than the
+    size specified in nsIImportMailboxID.GetSize();  May be called from
+    a different thread than ImportMailbox()
+  */
+  unsigned long GetImportProgress();
+
+    /*
+   * When migrating the local folders from the import source into mozilla,
+   * we want to translate reserved folder names from the import source to
+   * equivalent values for Mozilla.
+   * Localization Impact is unknown here.
+   */
+  AString translateFolderName(in AString aFolderName);
+};
+
+%{ C++
+#define kDestTrashFolderName "Trash"
+#define kDestUnsentMessagesFolderName "Unsent Messages"
+#define kDestSentFolderName "Sent"
+#define kDestInboxFolderName "Inbox"
+%}