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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) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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 ***** */

/* base class for all rule types in a CSS style sheet */

#ifndef nsCSSRule_h___
#define nsCSSRule_h___

#include "nsISupports.h"
#include "nsCOMPtr.h"
#include "nsCSSStyleSheet.h"

class nsICSSGroupRule;

class nsCSSRule {
public:
  nsCSSRule(void)
    : mSheet(nsnull),
      mParentRule(nsnull)
  {
  }

  nsCSSRule(const nsCSSRule& aCopy)
    : mSheet(aCopy.mSheet),
      mParentRule(aCopy.mParentRule)
  {
  }

  already_AddRefed<nsIStyleSheet>
  GetStyleSheet() const
  {
    NS_IF_ADDREF(mSheet);
    return mSheet;
  }

  void
  SetStyleSheet(nsCSSStyleSheet* aSheet)
  {
    // We don't reference count this up reference. The style sheet
    // will tell us when it's going away or when we're detached from
    // it.
    mSheet = aSheet;
  }

  void
  SetParentRule(nsICSSGroupRule* aRule)
  {
    // We don't reference count this up reference. The group rule
    // will tell us when it's going away or when we're detached from
    // it.
    mParentRule = aRule;
  }

protected:
  nsCSSStyleSheet*    mSheet;
  nsICSSGroupRule*    mParentRule;
};

#endif /* nsCSSRule_h___ */