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 nsMathMLmrowFrame_h___
michael@0: #define nsMathMLmrowFrame_h___
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsMathMLContainerFrame.h"
michael@0: 
michael@0: //
michael@0: // <mrow> -- horizontally group any number of subexpressions 
michael@0: //
michael@0: 
michael@0: class nsMathMLmrowFrame : public nsMathMLContainerFrame {
michael@0: public:
michael@0:   NS_DECL_FRAMEARENA_HELPERS
michael@0: 
michael@0:   friend nsIFrame* NS_NewMathMLmrowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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:   NS_IMETHOD
michael@0:   InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_IMETHOD
michael@0:   TransmitAutomaticData() MOZ_OVERRIDE {
michael@0:     return TransmitAutomaticDataForMrowLikeElement();
michael@0:   }
michael@0: 
michael@0:   virtual eMathMLFrameType
michael@0:   GetMathMLFrameType() MOZ_OVERRIDE; 
michael@0: 
michael@0:   bool
michael@0:   IsMrowLike() MOZ_OVERRIDE {
michael@0:     // <mrow> elements with a single child are treated identically to the case
michael@0:     // where the child wasn't within an mrow, so we pretend the mrow isn't an
michael@0:     // mrow in that situation.
michael@0:     return mFrames.FirstChild() != mFrames.LastChild() ||
michael@0:            !mFrames.FirstChild();
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   nsMathMLmrowFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
michael@0:   virtual ~nsMathMLmrowFrame();
michael@0: };
michael@0: 
michael@0: #endif /* nsMathMLmrowFrame_h___ */