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/* -*- Mode: C++; 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Original Author: Eric D. Vaughan (evaughan@netscape.com)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 "nsIBoxObject.idl"

interface nsIDOMElement;


[scriptable, uuid(56E2ADA8-4631-11d4-BA11-001083023C1E)]
interface nsIScrollBoxObject : nsISupports
{
  /**
   * Scroll to the given coordinates, in css pixels.
   * (0,0) will put the top left corner of the scrolled element's padding-box
   * at the top left corner of the scrollport (which is its inner-border-box).
   * Values will be clamped to legal values.
   */
  void scrollTo(in long x, in long y);

  /**
   * Scroll the given amount of device pixels to the right and down.
   * Values will be clamped to make the resuling position legal.
   */
  void scrollBy(in long dx, in long dy);

  void scrollByLine(in long dlines);
  void scrollByIndex(in long dindexes);
  void scrollToLine(in long line);
  void scrollToElement(in nsIDOMElement child);
  void scrollToIndex(in long index);

  /**
   * Get the current scroll position in css pixels.
   * @see scrollTo for the definition of x and y.
   */
  void getPosition(out long x, out long y);

  void getScrolledSize(out long width, out long height);
  void ensureElementIsVisible(in nsIDOMElement child);
  void ensureIndexIsVisible(in long index);
  void ensureLineIsVisible(in long line);
};

%{C++
nsresult
NS_NewScrollBoxObject(nsIBoxObject** aResult);

%}