gecko-dev/layout/generic/nsHTMLContainerFrame.h

97 lines
3.7 KiB
C++

/* -*- 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 nsHTMLContainerFrame_h___
#define nsHTMLContainerFrame_h___
#include "nsContainerFrame.h"
class nsString;
class nsAbsoluteFrame;
class nsPlaceholderFrame;
struct nsStyleDisplay;
struct nsStylePosition;
// Some macros for container classes to do sanity checking on
// width/height/x/y values computed during reflow.
#ifdef DEBUG
#define CRAZY_W 500000
// 100000 lines, approximately. Assumes p2t is 15 and 15 pixels per line
#define CRAZY_H 22500000
#define CRAZY_WIDTH(_x) (((_x) < -CRAZY_W) || ((_x) > CRAZY_W))
#define CRAZY_HEIGHT(_y) (((_y) < -CRAZY_H) || ((_y) > CRAZY_H))
#endif
// 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);
/**
* 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)
* @param aContentParentFrame
* if non-null, this is the frame
* which would have held aFrame except that aFrame was reparented
* to an alternative geometric parent. This is necessary
* so that aFrame can remember to get its Z-order from
* aContentParentFrame.
*/
static nsresult CreateViewForFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aStyleContext,
nsIFrame* aContentParentFrame,
PRBool aForce);
static nsresult ReparentFrameView(nsIPresContext* aPresContext,
nsIFrame* aChildFrame,
nsIFrame* aOldParentFrame,
nsIFrame* aNewParentFrame);
static nsresult ReparentFrameViewList(nsIPresContext* aPresContext,
nsIFrame* aChildFrameList,
nsIFrame* aOldParentFrame,
nsIFrame* aNewParentFrame);
protected:
virtual PRIntn GetSkipSides() const = 0;
};
#endif /* nsHTMLContainerFrame_h___ */