gecko-dev/layout/generic/nsHTMLContainerFrame.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 nsHTMLContainerFrame_h___
#define nsHTMLContainerFrame_h___
#include "nsContainerFrame.h"
class nsString;
class nsAbsoluteFrame;
class nsPlaceholderFrame;
struct nsStyleDisplay;
struct nsStylePosition;
// Base class for html container frames that provides common
// functionality.
class nsHTMLContainerFrame : public nsContainerFrame {
public:
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
nsPlaceholderFrame* CreatePlaceholderFrame(nsIPresContext& aPresContext,
nsIFrame* aFloatedFrame);
// If the frame should be floated or absolutely positioned creates a
// placeholder frame and returns PR_TRUE. The sibling list is
// modified so aFrame's next sibling pointer is set to nsnull, and
// aPlaceholderFrame's sibling pointer is set to what aFrame's
// sibling pointer was. It's up to the caller to adjust any previous
// sibling pointers.
// XXX bad api - need nsresult in case we attempt to move out of the
// flow and run out of memory
PRBool MoveFrameOutOfFlow(nsIPresContext& aPresContext,
nsIFrame* aFrame,
const nsStyleDisplay* aDisplay,
const nsStylePosition* aPosition,
nsIFrame*& aPlaceholderFrame);
/**
* Helper method to create next-in-flows if necessary. If aFrame
* already has a next-in-flow then this method does
* nothing. Otherwise, a new continuation frame is created and
* linked into the flow. In addition, the new frame becomes the
* next-sibling of aFrame.
*/
static nsresult CreateNextInFlow(nsIPresContext& aPresContext,
nsIFrame* aOuterFrame,
nsIFrame* aFrame,
nsIFrame*& aNextInFlowResult);
// Helper method to wrap views around frames. Used by containers
// under special circumstances (can be used by leaf frames as well)
static nsresult CreateViewForFrame(nsIPresContext& aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aStyleContext,
PRBool aForce);
static void UpdateStyleContexts(nsIPresContext& aPresContext,
nsIFrame* aFrame,
nsIFrame* aOldParent,
nsIFrame* aNewParent);
protected:
virtual PRIntn GetSkipSides() const = 0;
};
#endif /* nsHTMLContainerFrame_h___ */