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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Conrad Carlen <ccarlen@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"
interface nsILocalFile;

/**
 * The nsIRelativeFilePref interface is a wrapper for an nsILocalFile and
 * and a directory service key. When used as a pref value, it stores a
 * relative path to the file from the location pointed to by the directory
 * service key. The path has the same syntax across all platforms.
 *
 * @see nsIPrefBranch::getComplexValue
 * @see nsIPrefBranch::setComplexValue
 * 
 */

[scriptable, uuid(2f977d4e-5485-11d4-87e2-0010a4e75ef2)]
interface nsIRelativeFilePref : nsISupports
{
  /**
   * file
   *
   * The file whose location is stored or retrieved.
   */
  attribute nsILocalFile file;

  /**
   * relativeToKey
   *
   * A directory service key for the directory
   * from which the file path is relative.
   */
  attribute ACString relativeToKey;

};

%{C++

#define NS_RELATIVEFILEPREF_CID                        \
  { /* {2f977d4f-5485-11d4-87e2-0010a4e75ef2} */       \
    0x2f977d4f,                                        \
    0x5485,                                            \
    0x11d4,                                            \
    { 0x87, 0xe2, 0x00, 0x10, 0xa4, 0xe7, 0x5e, 0xf2 } \
  }

#define NS_RELATIVEFILEPREF_CONTRACTID "@mozilla.org/pref-relativefile;1"
#define NS_RELATIVEFILEPREF_CLASSNAME "Relative File Pref"

#include "nsComponentManagerUtils.h"

inline nsresult
NS_NewRelativeFilePref(nsILocalFile* aFile, const nsACString& relativeToKey, nsIRelativeFilePref** result)
{
    nsresult rv;
    nsCOMPtr<nsIRelativeFilePref> local(do_CreateInstance(NS_RELATIVEFILEPREF_CONTRACTID, &rv));
    if (NS_FAILED(rv)) return rv;
    
    (void)local->SetFile(aFile);
    (void)local->SetRelativeToKey(relativeToKey);

    *result = local;
    NS_ADDREF(*result);
    return NS_OK;
}

%}