/* -*- 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 "nsIArray.idl"
#include "nsIAccessibleText.idl"

interface nsIAccessible;

[scriptable, builtinclass, uuid(9181e777-8954-4f8f-8cee-32f9771e40d7)]
interface nsIAccessibleTextLeafPoint : nsISupports
{
  attribute nsIAccessible accessible;

  attribute long offset;

  /**
   * Find a boundary (word start, line start, etc.) in a specific direction.
   * If no boundary is found, the start/end of the document is returned
   * (depending on the direction).
   *
   * @param aBoundaryType [in] the boundary type to search for
   * @param aDirection    [in] search next or previous
   * @param aFlags        [in] optional flags for search
   */
  nsIAccessibleTextLeafPoint findBoundary(in AccessibleTextBoundary aBoundaryType,
                                          in unsigned long aDirection,
                                          in unsigned long aFlags);

  const long DIRECTION_NEXT     = 0x0;
  const long DIRECTION_PREVIOUS = 0x1;

  // Keep these flags up to date with the ones in TextLeafPoint.
  const unsigned long BOUNDARY_FLAG_DEFAULT          = 0x0;
  // If current point is a matching boundary, return unchanged.
  const unsigned long BOUNDARY_FLAG_INCLUDE_ORIGIN   = 0x1;
  // Do not search past end of editables.
  const unsigned long BOUNDARY_FLAG_STOP_IN_EDITABLE = 0x2;
  // Skip over list items in searches and don't consider them line or paragraph starts.
  const unsigned long BOUNDARY_FLAG_SKIP_LIST_ITEM_MARKER = 0x4;
};