/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 Places.
 *
 * The Initial Developer of the Original Code is Google Inc.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Annie Sullivan <annie.sullivan@gmail.com> (original author)
 *   Asaf Romano <mano@mozilla.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 nsIURI;
interface nsINavHistoryContainerResultNode;
interface nsINavHistoryQueryOptions;

/**
 * The dynamic container interface provides a base class for services that want
 * to provide containers for temporary contents.
 *
 * The service can fill result nodes directly into the container when it is
 * being opened. It can use the property bag on every result node to store data
 * associated with each item, such as full path on disk. It would create
 * additional containers for each container, registered to its service.
 *
 * See also createDynamicContainer in nsINavBookmarksService.
 */

[scriptable, uuid(7e85d97b-4109-4ea7-afd8-bc2cd3840d70)]
interface nsIDynamicContainer : nsISupports
{
  /**
   * Called when the given container node is about to be populated so that the
   * service can populate the container if necessary.
   *
   * @param aContainer
   *        The container node for the container being opened. Note that all
   *        result nodes implement a property bag if you need to store state.
   * @param aOptions
   *        The options used to generate this query. Containers should follow
   *        these when possible, for example, whether to expand queries, etc.
   *        Implementations should use this when possible if adding query and
   *        folder nodes to the container. DO NOT MODIFY THIS VALUE.
   */
  void onContainerNodeOpening(in nsINavHistoryContainerResultNode aContainer,
                              in nsINavHistoryQueryOptions aOptions);

  /**
   * Called when the given container has just been collapsed so that the
   * service can do any necessary cleanup. This is NOT guaranteed to get
   * called. In particular, if the query just goes away, you will not get this
   * call. This only happens when the container itself goes from the open state
   * to the closed state. A service with large numbers of dynamically populated
   * items might use this to do some cleanup so those items don't hang around
   *
   * @param aContainer
   *        The container node of the container being closed. The service need
   *        not worry about removing any created nodes, they will be
   *        automatically removed when this call completes.
   */
  void onContainerNodeClosed(in nsINavHistoryContainerResultNode aContainer);

  /**
   * Called when the given container is about to be deleted from the bookmarks
   * table, so that the service can do any necessary cleanup.
   * Called BEFORE the container is deleted, so that the service
   * can still reference it.
   * @param aItemId
   *        The item-id of the container item.
   */
  void onContainerRemoving(in long long aItemId);

  /**
   * Called when the given container has just been moved, in case
   * the service needs to do any bookkeeping.
   * Called AFTER the container has been moved.
   * @param aItemId
   *        The item-id of the container item.
   * @param aNewParent
   *        The item of the new parent folder for the container.
   * @param aNewIndex
   *        The index the container will be inserted at, or -1 for append.
   */
  void onContainerMoved(in long long aItemId,
                        in long long aNewParent, in long aNewIndex);
};