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/* -*- 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 MathML Project.
*
* The Initial Developer of the Original Code is
* The University Of Queensland.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Roger B. Sidje <rbs@maths.uq.edu.au>
* David J. Fiddes <D.J.Fiddes@hw.ac.uk>
* Frederic Wang <fred.wang@free.fr>
*
* 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 ***** */
#ifndef nsMathMLmfencedFrame_h
#define nsMathMLmfencedFrame_h
#include "nsCOMPtr.h"
#include "nsMathMLContainerFrame.h"
//
// <mfenced> -- surround content with a pair of fences
//
class nsMathMLmfencedFrame : public nsMathMLContainerFrame {
public:
NS_DECL_FRAMEARENA_HELPERS
friend nsIFrame* NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
virtual void
SetAdditionalStyleContext(PRInt32 aIndex,
nsStyleContext* aStyleContext);
virtual nsStyleContext*
GetAdditionalStyleContext(PRInt32 aIndex) const;
NS_IMETHOD
InheritAutomaticData(nsIFrame* aParent);
NS_IMETHOD
SetInitialChildList(nsIAtom* aListName,
nsFrameList& aChildList);
NS_IMETHOD
Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
virtual nscoord
GetIntrinsicWidth(nsRenderingContext* aRenderingContext);
NS_IMETHOD
AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType);
// override the base method because we must keep separators in sync
virtual nsresult
ChildListChanged(PRInt32 aModType);
// override the base method so that we can deal with fences and separators
virtual nscoord
FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize);
// helper routines to format the MathMLChars involved here
static nsresult
ReflowChar(nsPresContext* aPresContext,
nsRenderingContext& aRenderingContext,
nsMathMLChar* aMathMLChar,
nsOperatorFlags aForm,
PRInt32 aScriptLevel,
nscoord axisHeight,
nscoord leading,
nscoord em,
nsBoundingMetrics& aContainerSize,
nscoord& aAscent,
nscoord& aDescent);
static void
PlaceChar(nsMathMLChar* aMathMLChar,
nscoord aDesiredSize,
nsBoundingMetrics& bm,
nscoord& dx);
protected:
nsMathMLmfencedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
virtual ~nsMathMLmfencedFrame();
virtual PRIntn GetSkipSides() const { return 0; }
nsMathMLChar* mOpenChar;
nsMathMLChar* mCloseChar;
nsMathMLChar* mSeparatorsChar;
PRInt32 mSeparatorsCount;
// clean up
void
RemoveFencesAndSeparators();
// add fences and separators when all child frames are known
void
CreateFencesAndSeparators(nsPresContext* aPresContext);
};
#endif /* nsMathMLmfencedFrame_h */
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