/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef nsMathMLmfencedFrame_h #define nsMathMLmfencedFrame_h #include "mozilla/Attributes.h" #include "nsMathMLContainerFrame.h" class nsFontMetrics; // // <mfenced> -- surround content with a pair of fences // class nsMathMLmfencedFrame final : public nsMathMLContainerFrame { public: NS_DECL_FRAMEARENA_HELPERS friend nsIFrame* NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); virtual void SetAdditionalStyleContext(int32_t aIndex, nsStyleContext* aStyleContext) override; virtual nsStyleContext* GetAdditionalStyleContext(int32_t aIndex) const override; NS_IMETHOD InheritAutomaticData(nsIFrame* aParent) override; virtual void SetInitialChildList(ChildListID aListID, nsFrameList& aChildList) override; virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize, const ReflowInput& aReflowInput, nsReflowStatus& aStatus) override; virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) override; virtual void GetIntrinsicISizeMetrics(nsRenderingContext* aRenderingContext, ReflowOutput& aDesiredSize) override; virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) override; // override the base method because we must keep separators in sync virtual nsresult ChildListChanged(int32_t aModType) override; // override the base method so that we can deal with fences and separators virtual nscoord FixInterFrameSpacing(ReflowOutput& aDesiredSize) override; // helper routines to format the MathMLChars involved here static nsresult ReflowChar(nsPresContext* aPresContext, DrawTarget* aDrawTarget, nsFontMetrics& aFontMetrics, float aFontSizeInflation, nsMathMLChar* aMathMLChar, nsOperatorFlags aForm, int32_t aScriptLevel, nscoord axisHeight, nscoord leading, nscoord em, nsBoundingMetrics& aContainerSize, nscoord& aAscent, nscoord& aDescent, bool aRTL); static void PlaceChar(nsMathMLChar* aMathMLChar, nscoord aDesiredSize, nsBoundingMetrics& bm, nscoord& dx); virtual bool IsMrowLike() override { // Always treated as an mrow with > 1 child as // <mfenced> <mo>%</mo> </mfenced> // renders equivalently to // <mrow> <mo> ( </mo> <mo>%</mo> <mo> ) </mo> </mrow> // This also holds with multiple children. (MathML3 3.3.8.1) return true; } protected: explicit nsMathMLmfencedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {} virtual ~nsMathMLmfencedFrame(); nsMathMLChar* mOpenChar; nsMathMLChar* mCloseChar; nsMathMLChar* mSeparatorsChar; int32_t mSeparatorsCount; // clean up void RemoveFencesAndSeparators(); // add fences and separators when all child frames are known void CreateFencesAndSeparators(nsPresContext* aPresContext); }; #endif /* nsMathMLmfencedFrame_h */