/* -*- 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 Communicator client 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: David W. Hyatt (hyatt@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 ***** */
#ifndef nsBoxObject_h_
#define nsBoxObject_h_

#include "nsCOMPtr.h"
#include "nsIBoxObject.h"
#include "nsPIBoxObject.h"
#include "nsPoint.h"
#include "nsAutoPtr.h"
#include "nsHashKeys.h"
#include "nsInterfaceHashtable.h"
#include "nsCycleCollectionParticipant.h"

class nsIFrame;
class nsIDocShell;
struct nsIntRect;
class nsIPresShell;

class nsBoxObject : public nsPIBoxObject
{
  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_CLASS(nsBoxObject)
  NS_DECL_NSIBOXOBJECT

public:
  nsBoxObject();
  virtual ~nsBoxObject();

  // nsPIBoxObject
  virtual nsresult Init(nsIContent* aContent);
  virtual void Clear();
  virtual void ClearCachedValues();

  nsIFrame* GetFrame(PRBool aFlushLayout);
  nsIPresShell* GetPresShell(PRBool aFlushLayout);
  nsresult GetOffsetRect(nsIntRect& aRect);
  nsresult GetScreenPosition(nsIntPoint& aPoint);

  // Given a parent frame and a child frame, find the frame whose
  // next sibling is the given child frame and return its element
  static nsresult GetPreviousSibling(nsIFrame* aParentFrame, nsIFrame* aFrame,
                                     nsIDOMElement** aResult);

protected:

  nsAutoPtr<nsInterfaceHashtable<nsStringHashKey,nsISupports> > mPropertyTable; //[OWNER]

  nsIContent* mContent; // [WEAK]
};

#endif
