Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef nsMathMLmrowFrame_h___
       7             : #define nsMathMLmrowFrame_h___
       8             : 
       9             : #include "mozilla/Attributes.h"
      10             : #include "nsMathMLContainerFrame.h"
      11             : 
      12             : //
      13             : // <mrow> -- horizontally group any number of subexpressions
      14             : // <mphantom> -- make content invisible but preserve its size
      15             : // <mstyle> -- make style changes that affect the rendering of its contents
      16             : //
      17             : 
      18             : class nsMathMLmrowFrame : public nsMathMLContainerFrame {
      19             : public:
      20           0 :   NS_DECL_FRAMEARENA_HELPERS(nsMathMLmrowFrame)
      21             : 
      22             :   friend nsIFrame* NS_NewMathMLmrowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
      23             : 
      24             :   virtual nsresult
      25             :   AttributeChanged(int32_t  aNameSpaceID,
      26             :                    nsIAtom* aAttribute,
      27             :                    int32_t  aModType) override;
      28             : 
      29             :   NS_IMETHOD
      30             :   InheritAutomaticData(nsIFrame* aParent) override;
      31             : 
      32             :   NS_IMETHOD
      33           0 :   TransmitAutomaticData() override {
      34           0 :     return TransmitAutomaticDataForMrowLikeElement();
      35             :   }
      36             : 
      37             :   virtual eMathMLFrameType
      38             :   GetMathMLFrameType() override;
      39             : 
      40             :   bool
      41           0 :   IsMrowLike() override {
      42             :     // <mrow> elements with a single child are treated identically to the case
      43             :     // where the child wasn't within an mrow, so we pretend the mrow isn't an
      44             :     // mrow in that situation.
      45           0 :     return mFrames.FirstChild() != mFrames.LastChild() ||
      46           0 :            !mFrames.FirstChild();
      47             :   }
      48             : 
      49             : protected:
      50           0 :   explicit nsMathMLmrowFrame(nsStyleContext* aContext)
      51           0 :     : nsMathMLContainerFrame(aContext, kClassID) {}
      52             :   virtual ~nsMathMLmrowFrame();
      53             : };
      54             : 
      55             : #endif /* nsMathMLmrowFrame_h___ */