michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsMathMLmfencedFrame_h
michael@0: #define nsMathMLmfencedFrame_h
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsMathMLContainerFrame.h"
michael@0: 
michael@0: //
michael@0: // <mfenced> -- surround content with a pair of fences
michael@0: //
michael@0: 
michael@0: class nsMathMLmfencedFrame : public nsMathMLContainerFrame {
michael@0: public:
michael@0:   NS_DECL_FRAMEARENA_HELPERS
michael@0: 
michael@0:   friend nsIFrame* NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
michael@0: 
michael@0:   virtual void
michael@0:   SetAdditionalStyleContext(int32_t          aIndex, 
michael@0:                             nsStyleContext*  aStyleContext) MOZ_OVERRIDE;
michael@0:   virtual nsStyleContext*
michael@0:   GetAdditionalStyleContext(int32_t aIndex) const MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_IMETHOD
michael@0:   InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsresult
michael@0:   SetInitialChildList(ChildListID     aListID,
michael@0:                       nsFrameList&    aChildList) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsresult
michael@0:   Reflow(nsPresContext*          aPresContext,
michael@0:          nsHTMLReflowMetrics&     aDesiredSize,
michael@0:          const nsHTMLReflowState& aReflowState,
michael@0:          nsReflowStatus&          aStatus) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
michael@0:                                 const nsRect&           aDirtyRect,
michael@0:                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual void
michael@0:   GetIntrinsicWidthMetrics(nsRenderingContext* aRenderingContext,
michael@0:                            nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsresult
michael@0:   AttributeChanged(int32_t         aNameSpaceID,
michael@0:                    nsIAtom*        aAttribute,
michael@0:                    int32_t         aModType) MOZ_OVERRIDE;
michael@0: 
michael@0:   // override the base method because we must keep separators in sync
michael@0:   virtual nsresult
michael@0:   ChildListChanged(int32_t aModType) MOZ_OVERRIDE;
michael@0: 
michael@0:   // override the base method so that we can deal with fences and separators
michael@0:   virtual nscoord
michael@0:   FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
michael@0: 
michael@0:   // helper routines to format the MathMLChars involved here
michael@0:   static nsresult
michael@0:   ReflowChar(nsPresContext*      aPresContext,
michael@0:              nsRenderingContext& aRenderingContext,
michael@0:              nsMathMLChar*        aMathMLChar,
michael@0:              nsOperatorFlags      aForm,
michael@0:              int32_t              aScriptLevel,
michael@0:              nscoord              axisHeight,
michael@0:              nscoord              leading,
michael@0:              nscoord              em,
michael@0:              nsBoundingMetrics&   aContainerSize,
michael@0:              nscoord&             aAscent,
michael@0:              nscoord&             aDescent,
michael@0:              bool                 aRTL);
michael@0: 
michael@0:   static void
michael@0:   PlaceChar(nsMathMLChar*      aMathMLChar,
michael@0:             nscoord            aDesiredSize,
michael@0:             nsBoundingMetrics& bm,
michael@0:             nscoord&           dx);
michael@0: 
michael@0:   virtual bool
michael@0:   IsMrowLike() MOZ_OVERRIDE
michael@0:   {
michael@0:     // Always treated as an mrow with > 1 child as
michael@0:     // <mfenced> <mo>%</mo> </mfenced>
michael@0:     // renders equivalently to
michael@0:     // <mrow> <mo> ( </mo> <mo>%</mo> <mo> ) </mo> </mrow>
michael@0:     // This also holds with multiple children.  (MathML3 3.3.8.1)
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   nsMathMLmfencedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
michael@0:   virtual ~nsMathMLmfencedFrame();
michael@0:   
michael@0:   nsMathMLChar* mOpenChar;
michael@0:   nsMathMLChar* mCloseChar;
michael@0:   nsMathMLChar* mSeparatorsChar;
michael@0:   int32_t       mSeparatorsCount;
michael@0: 
michael@0:   // clean up
michael@0:   void
michael@0:   RemoveFencesAndSeparators();
michael@0: 
michael@0:   // add fences and separators when all child frames are known
michael@0:   void
michael@0:   CreateFencesAndSeparators(nsPresContext* aPresContext);
michael@0: };
michael@0: 
michael@0: #endif /* nsMathMLmfencedFrame_h */