/* -*- 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/. */

#include "nsISupports.idl"
#include "nsIASN1Object.idl"

interface nsIMutableArray;

/**
 * This represents a sequence of ASN.1 objects,
 * where ASN.1 is "Abstract Syntax Notation number One".
 *
 * Overview of how this ASN1 interface is intended to
 * work.
 *
 * First off, the nsIASN1Sequence is any type in ASN1
 * that consists of sub-elements (ie SEQUENCE, SET)
 * nsIASN1Printable Items are all the other types that
 * can be viewed by themselves without interpreting further.
 * Examples would include INTEGER, UTF-8 STRING, OID.
 * These are not intended to directly reflect the numberous
 * types that exist in ASN1, but merely an interface to ease
 * producing a tree display the ASN1 structure of any DER
 * object.
 *
 * The additional state information carried in this interface
 * makes it fit for being used as the data structure
 * when working with visual reprenstation of ASN.1 objects
 * in a human user interface, like in a tree widget
 * where open/close state of nodes must be remembered.
 */
[scriptable, uuid(b6b957e6-1dd1-11b2-89d7-e30624f50b00)]
interface nsIASN1Sequence : nsIASN1Object {

  /**
   *  The array of objects stored in the sequence.
   */
  attribute nsIMutableArray ASN1Objects;

  /**
   *  Whether the node at this position in the ASN.1 data structure
   *  sequence contains sub elements understood by the
   *  application.
   */
  attribute boolean isValidContainer;

  /**
   *  Whether the contained objects should be shown or hidden.
   *  A UI implementation can use this flag to store the current
   *  expansion state when shown in a tree widget.
   */
  attribute boolean isExpanded;
};