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/* -*- 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/. */


/**
 * This interface wraps an nsTArray<nsMsgKey> so that we can pass arrays
 * back and forth between c++ and js (or via xpconnect generally).
 */

#include "nsISupports.idl"
#include "MailNewsTypes2.idl"

[scriptable, uuid(4aa3ed2e-5bb1-40b3-ad03-2f1cfef386c4)]
interface nsIMsgKeyArray : nsISupports {
  /**
   * Get the key at the specified 0-based array index.
   *
   * @param aIndex 0-based index.
   * @returns key at the specified index.
   */
  nsMsgKey getKeyAt(in long aIndex);

  readonly attribute unsigned long length;

  void setCapacity(in unsigned long aCapacity);
  /**
   * Adds a key to the end of the array
   * @param key to append to the array.
   */
  void appendElement(in nsMsgKey aMsgKey);

  /**
   * Inserts a key into a previously sorted array
   * @param key to insert into the array.
   */
  void insertElementSorted(in nsMsgKey aMsgKey);

  /**
   * Sort the array by key.
   */
  void sort();

  /**
   * Retrieves the entire array in such a way that xpconnect can easily
   * create a js array of the keys.
   *
   * @returns array of the keys
   */
  void getArray(out unsigned long aCount,
           [array, size_is(aCount)] out nsMsgKey aKeys);
};