1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/mathml/nsMathMLmfencedFrame.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,112 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsMathMLmfencedFrame_h
1.10 +#define nsMathMLmfencedFrame_h
1.11 +
1.12 +#include "mozilla/Attributes.h"
1.13 +#include "nsMathMLContainerFrame.h"
1.14 +
1.15 +//
1.16 +// <mfenced> -- surround content with a pair of fences
1.17 +//
1.18 +
1.19 +class nsMathMLmfencedFrame : public nsMathMLContainerFrame {
1.20 +public:
1.21 + NS_DECL_FRAMEARENA_HELPERS
1.22 +
1.23 + friend nsIFrame* NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
1.24 +
1.25 + virtual void
1.26 + SetAdditionalStyleContext(int32_t aIndex,
1.27 + nsStyleContext* aStyleContext) MOZ_OVERRIDE;
1.28 + virtual nsStyleContext*
1.29 + GetAdditionalStyleContext(int32_t aIndex) const MOZ_OVERRIDE;
1.30 +
1.31 + NS_IMETHOD
1.32 + InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;
1.33 +
1.34 + virtual nsresult
1.35 + SetInitialChildList(ChildListID aListID,
1.36 + nsFrameList& aChildList) MOZ_OVERRIDE;
1.37 +
1.38 + virtual nsresult
1.39 + Reflow(nsPresContext* aPresContext,
1.40 + nsHTMLReflowMetrics& aDesiredSize,
1.41 + const nsHTMLReflowState& aReflowState,
1.42 + nsReflowStatus& aStatus) MOZ_OVERRIDE;
1.43 +
1.44 + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.45 + const nsRect& aDirtyRect,
1.46 + const nsDisplayListSet& aLists) MOZ_OVERRIDE;
1.47 +
1.48 + virtual void
1.49 + GetIntrinsicWidthMetrics(nsRenderingContext* aRenderingContext,
1.50 + nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
1.51 +
1.52 + virtual nsresult
1.53 + AttributeChanged(int32_t aNameSpaceID,
1.54 + nsIAtom* aAttribute,
1.55 + int32_t aModType) MOZ_OVERRIDE;
1.56 +
1.57 + // override the base method because we must keep separators in sync
1.58 + virtual nsresult
1.59 + ChildListChanged(int32_t aModType) MOZ_OVERRIDE;
1.60 +
1.61 + // override the base method so that we can deal with fences and separators
1.62 + virtual nscoord
1.63 + FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
1.64 +
1.65 + // helper routines to format the MathMLChars involved here
1.66 + static nsresult
1.67 + ReflowChar(nsPresContext* aPresContext,
1.68 + nsRenderingContext& aRenderingContext,
1.69 + nsMathMLChar* aMathMLChar,
1.70 + nsOperatorFlags aForm,
1.71 + int32_t aScriptLevel,
1.72 + nscoord axisHeight,
1.73 + nscoord leading,
1.74 + nscoord em,
1.75 + nsBoundingMetrics& aContainerSize,
1.76 + nscoord& aAscent,
1.77 + nscoord& aDescent,
1.78 + bool aRTL);
1.79 +
1.80 + static void
1.81 + PlaceChar(nsMathMLChar* aMathMLChar,
1.82 + nscoord aDesiredSize,
1.83 + nsBoundingMetrics& bm,
1.84 + nscoord& dx);
1.85 +
1.86 + virtual bool
1.87 + IsMrowLike() MOZ_OVERRIDE
1.88 + {
1.89 + // Always treated as an mrow with > 1 child as
1.90 + // <mfenced> <mo>%</mo> </mfenced>
1.91 + // renders equivalently to
1.92 + // <mrow> <mo> ( </mo> <mo>%</mo> <mo> ) </mo> </mrow>
1.93 + // This also holds with multiple children. (MathML3 3.3.8.1)
1.94 + return true;
1.95 + }
1.96 +
1.97 +protected:
1.98 + nsMathMLmfencedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
1.99 + virtual ~nsMathMLmfencedFrame();
1.100 +
1.101 + nsMathMLChar* mOpenChar;
1.102 + nsMathMLChar* mCloseChar;
1.103 + nsMathMLChar* mSeparatorsChar;
1.104 + int32_t mSeparatorsCount;
1.105 +
1.106 + // clean up
1.107 + void
1.108 + RemoveFencesAndSeparators();
1.109 +
1.110 + // add fences and separators when all child frames are known
1.111 + void
1.112 + CreateFencesAndSeparators(nsPresContext* aPresContext);
1.113 +};
1.114 +
1.115 +#endif /* nsMathMLmfencedFrame_h */
