/* -*- Mode: IDL; 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"

webidl Node;
webidl Range;

/**
 * nsIScriptableContentIterator is designed to testing concrete classes of
 * ContentIteratorBase.
 */
[scriptable, builtinclass, uuid(9f25fb2a-265f-44f9-a122-62bbf443239e)]
interface nsIScriptableContentIterator : nsISupports
{
  cenum IteratorType : 8 {
    NOT_INITIALIZED,
    POST_ORDER_ITERATOR,
    PRE_ORDER_ITERATOR,
    SUBTREE_ITERATOR
  };

  /**
   * You need to call initWith*() first.  Then, the instance of this interface
   * decides the type of iterator with its aType argument.  You can call
   * initWith*() multiple times, but you need to keep setting same type as
   * previous call.  If you set different type, these method with throw an
   * exception.
   */

  // See ContentIteratorBase::Init(nsINode*)
  void initWithRootNode(in nsIScriptableContentIterator_IteratorType aType,
                        in Node aRoot);

  // See ContentIteratorBase::Init(nsRange*)
  void initWithRange(in nsIScriptableContentIterator_IteratorType aType,
                     in Range aRange);

  // See ContentIteratorBase::Init(nsINode*, uint32_t, nsINode*, uint32_t)
  void initWithPositions(in nsIScriptableContentIterator_IteratorType aType,
                         in Node aStartContainer, in unsigned long aStartOffset,
                         in Node aEndContainer, in unsigned long aEndOffset);

  // See ContentIteratorBase::First()
  void first();

  // See ContentIteratorBase::Last()
  void last();

  // See ContentIteratorBase::Next()
  void next();

  // See ContentIteratorBase::Prev()
  void prev();

  // See ContentIteratorBase::GetCurrentNode()
  readonly attribute Node currentNode;

  // See ContentIteratorBase::IsDone()
  readonly attribute bool isDone;

  // See ContentIteratorBase::PositionAt(nsINode*)
  void positionAt(in Node aNode);
};

%{C++
#define SCRIPTABLE_CONTENT_ITERATOR_CID \
  { 0xf68037ec, 0x2790, 0x44c5, \
    { 0x8e, 0x5f, 0xdf, 0x5d, 0xa5, 0x8b, 0x93, 0xa7 } }
#define SCRIPTABLE_CONTENT_ITERATOR_CONTRACTID \
  "@mozilla.org/scriptable-content-iterator;1"
%}