pjs/layout/generic/nsPlaceholderFrame.h

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/* -*- 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 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsPlaceholderFrame_h___
#define nsPlaceholderFrame_h___
#include "nsFrame.h"
// Implementation of a frame that's used as a placeholder for an anchored item
class PlaceholderFrame : public nsFrame
{
public:
/**
* Create a new placeholder frame
*/
static nsresult NewFrame(nsIFrame** aInstancePtrResult,
nsIContent* aContent,
nsIFrame* aParent);
// Returns the associated anchored item
nsIFrame* GetAnchoredItem() const {return mAnchoredItem;}
// nsIFrame overrides
NS_IMETHOD ChildCount(PRInt32& aChildCount) const;
NS_IMETHOD ChildAt(PRInt32 aIndex, nsIFrame*& aFrame) const;
NS_IMETHOD IndexOf(const nsIFrame* aChild, PRInt32& aIndex) const;
NS_IMETHOD FirstChild(nsIFrame*& aFirstChild) const;
NS_IMETHOD NextChild(const nsIFrame* aChild, nsIFrame*& aNextChild) const;
NS_IMETHOD PrevChild(const nsIFrame* aChild, nsIFrame*& aPrevChild) const;
NS_IMETHOD LastChild(nsIFrame*& aLastChild) const;
NS_IMETHOD ResizeReflow(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsSize* aMaxElementSize,
nsReflowStatus& aStatus);
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
NS_IMETHOD ListTag(FILE* out = stdout) const;
protected:
// Constructor. Takes as arguments the content object, the index in parent,
// and the Frame for the content parent
PlaceholderFrame(nsIContent* aContent, nsIFrame* aParent);
virtual ~PlaceholderFrame();
nsIFrame* mAnchoredItem;
};
#endif /* nsPlaceholderFrame_h___ */