gecko-dev/layout/base/nsStyleChangeList.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */
#ifndef nsStyleChangeList_h___
#define nsStyleChangeList_h___

#include "nslayout.h"
#include "nsError.h"
class nsIFrame;
class nsIContent;

// XXX would all platforms support putting this inside the list?
struct nsStyleChangeData {
  nsIFrame*   mFrame;
  nsIContent* mContent;
  PRInt32     mHint;
};

static const PRUint32 kStyleChangeBufferSize = 10;

class NS_LAYOUT nsStyleChangeList {
public:
  nsStyleChangeList(void);
  ~nsStyleChangeList(void);

  PRInt32 Count(void) const {
    return mCount;
  }

  nsresult ChangeAt(PRInt32 aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
                    PRInt32& aHint) const;

  nsresult AppendChange(nsIFrame* aFrame, nsIContent* aContent, PRInt32 aHint);

  void Clear(void);

protected:
  nsStyleChangeList&  operator=(const nsStyleChangeList& aCopy);
  PRBool              operator==(const nsStyleChangeList& aOther) const;

  nsStyleChangeData*  mArray;
  PRInt32             mArraySize;
  PRInt32             mCount;
  nsStyleChangeData   mBuffer[kStyleChangeBufferSize];
};


#endif /* nsStyleChangeList_h___ */