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137 lines
4.8 KiB
C++
137 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla MathML Project.
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*
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* The Initial Developer of the Original Code is
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* The University Of Queensland.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Roger B. Sidje <rbs@maths.uq.edu.au>
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* David J. Fiddes <D.J.Fiddes@hw.ac.uk>
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* Frederic Wang <fred.wang@free.fr>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsMathMLmfencedFrame_h
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#define nsMathMLmfencedFrame_h
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#include "nsCOMPtr.h"
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#include "nsMathMLContainerFrame.h"
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//
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// <mfenced> -- surround content with a pair of fences
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//
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class nsMathMLmfencedFrame : public nsMathMLContainerFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS
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friend nsIFrame* NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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virtual void
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SetAdditionalStyleContext(PRInt32 aIndex,
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nsStyleContext* aStyleContext);
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virtual nsStyleContext*
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GetAdditionalStyleContext(PRInt32 aIndex) const;
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NS_IMETHOD
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InheritAutomaticData(nsIFrame* aParent);
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NS_IMETHOD
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SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList);
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NS_IMETHOD
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Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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virtual nscoord
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GetIntrinsicWidth(nsRenderingContext* aRenderingContext);
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NS_IMETHOD
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AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType);
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// override the base method because we must keep separators in sync
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virtual nsresult
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ChildListChanged(PRInt32 aModType);
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// override the base method so that we can deal with fences and separators
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virtual nscoord
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FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize);
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// helper routines to format the MathMLChars involved here
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static nsresult
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ReflowChar(nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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nsMathMLChar* aMathMLChar,
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nsOperatorFlags aForm,
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PRInt32 aScriptLevel,
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nscoord axisHeight,
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nscoord leading,
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nscoord em,
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nsBoundingMetrics& aContainerSize,
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nscoord& aAscent,
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nscoord& aDescent);
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static void
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PlaceChar(nsMathMLChar* aMathMLChar,
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nscoord aDesiredSize,
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nsBoundingMetrics& bm,
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nscoord& dx);
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protected:
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nsMathMLmfencedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
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virtual ~nsMathMLmfencedFrame();
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virtual PRIntn GetSkipSides() const { return 0; }
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nsMathMLChar* mOpenChar;
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nsMathMLChar* mCloseChar;
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nsMathMLChar* mSeparatorsChar;
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PRInt32 mSeparatorsCount;
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// clean up
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void
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RemoveFencesAndSeparators();
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// add fences and separators when all child frames are known
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void
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CreateFencesAndSeparators(nsPresContext* aPresContext);
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};
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#endif /* nsMathMLmfencedFrame_h */
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