gecko/layout/generic/nsHTMLContainerFrame.h

106 lines
4.1 KiB
C++

/* -*- 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) 1998
* 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 #2 for rendering objects that have child lists */
#ifndef nsHTMLContainerFrame_h___
#define nsHTMLContainerFrame_h___
#include "nsContainerFrame.h"
#include "nsDisplayList.h"
#include "gfxPoint.h"
class nsString;
class nsAbsoluteFrame;
class nsPlaceholderFrame;
struct nsStyleDisplay;
struct nsStylePosition;
struct nsHTMLReflowMetrics;
struct nsHTMLReflowState;
class nsLineBox;
// Some macros for container classes to do sanity checking on
// width/height/x/y values computed during reflow.
// NOTE: AppUnitsPerCSSPixel value hardwired here to remove the
// dependency on nsDeviceContext.h. It doesn't matter if it's a
// little off.
#ifdef DEBUG
#define CRAZY_W (1000000*60)
#define CRAZY_H CRAZY_W
#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_DECL_FRAMEARENA_HELPERS
/**
* 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 is inserted
* into the principal child list after aFrame.
* @note calling this method on a block frame is illegal. Use
* nsBlockFrame::CreateContinuationFor() instead.
* @param aNextInFlowResult will contain the next-in-flow
* <b>if and only if</b> one is created. If a next-in-flow already
* exists aNextInFlowResult is set to nsnull.
* @return NS_OK if a next-in-flow already exists or is successfully created.
*/
nsresult CreateNextInFlow(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame*& aNextInFlowResult);
/**
* Displays the standard border, background and outline for the frame
* and calls DisplayTextDecorationsAndChildren. This is suitable for
* inline frames or frames that behave like inlines.
*/
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
protected:
nsHTMLContainerFrame(nsStyleContext *aContext) : nsContainerFrame(aContext) {}
};
#endif /* nsHTMLContainerFrame_h___ */