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/* -*- Mode: C++; tab-width: 2; 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) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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"
#include "nsIFile.idl"

/**
 * nsIDirectoryServiceProvider
 *
 * Used by Directory Service to get file locations.
 */

[scriptable, uuid(bbf8cab0-d43a-11d3-8cc2-00609792278c)]
interface nsIDirectoryServiceProvider: nsISupports
{
 /**
  * getFile
  *
  * Directory Service calls this when it gets the first request for
  * a prop or on every request if the prop is not persistent.
  *
  * @param prop         The symbolic name of the file.
  * @param persistent   TRUE - The returned file will be cached by Directory
  *                     Service. Subsequent requests for this prop will
  *                     bypass the provider and use the cache.
  *                     FALSE - The provider will be asked for this prop
  *                     each time it is requested.
  *
  * @return             The file represented by the property.
  *
  */ 
  nsIFile getFile(in string prop, out PRBool persistent);
};

/**
 * nsIDirectoryServiceProvider2
 *
 * An extension of nsIDirectoryServiceProvider which allows
 * multiple files to be returned for the given key.
 */

[scriptable, uuid(2f977d4b-5485-11d4-87e2-0010a4e75ef2)]
interface nsIDirectoryServiceProvider2: nsIDirectoryServiceProvider
{
 /**
  * getFiles
  *
  * Directory Service calls this when it gets a request for
  * a prop and the requested type is nsISimpleEnumerator.
  *
  * @param prop         The symbolic name of the file list.
  *
  * @return             An enumerator for a list of file locations.
  *                     The elements in the enumeration are nsIFile
  * @returnCode         NS_SUCCESS_AGGREGATE_RESULT if this result should be
  *                     aggregated with other "lower" providers.
  */
  nsISimpleEnumerator getFiles(in string prop);
};

/**
 * nsIDirectoryService
 */

[scriptable, uuid(57a66a60-d43a-11d3-8cc2-00609792278c)]
interface nsIDirectoryService: nsISupports
{
 /**
  * init
  *
  * Must be called. Used internally by XPCOM initialization.
  *
  */
  void init();

 /**
  * registerProvider
  *
  * Register a provider with the service.
  *
  * @param prov            The service will keep a strong reference
  *                        to this object. It will be released when
  *                        the service is released.
  *
  */  
  void registerProvider(in nsIDirectoryServiceProvider prov);
  
 /**
  * unregisterProvider
  *
  * Unregister a provider with the service.
  *
  * @param prov            
  *
  */  
  void unregisterProvider(in nsIDirectoryServiceProvider prov);
};