The Tor Browser: layout/mathml/nsMathMLmrowFrame.h@7e26c7da4463

     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/. */

     6 #ifndef nsMathMLmrowFrame_h___

     7 #define nsMathMLmrowFrame_h___

     9 #include "mozilla/Attributes.h"

    10 #include "nsMathMLContainerFrame.h"

    12 //

    13 // <mrow> -- horizontally group any number of subexpressions

    14 //

    16 class nsMathMLmrowFrame : public nsMathMLContainerFrame {

    17 public:

    18   NS_DECL_FRAMEARENA_HELPERS

    20   friend nsIFrame* NS_NewMathMLmrowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

    22   virtual nsresult

    23   AttributeChanged(int32_t  aNameSpaceID,

    24                    nsIAtom* aAttribute,

    25                    int32_t  aModType) MOZ_OVERRIDE;

    27   NS_IMETHOD

    28   InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;

    30   NS_IMETHOD

    31   TransmitAutomaticData() MOZ_OVERRIDE {

    32     return TransmitAutomaticDataForMrowLikeElement();

    33   }

    35   virtual eMathMLFrameType

    36   GetMathMLFrameType() MOZ_OVERRIDE;

    38   bool

    39   IsMrowLike() MOZ_OVERRIDE {

    40     // <mrow> elements with a single child are treated identically to the case

    41     // where the child wasn't within an mrow, so we pretend the mrow isn't an

    42     // mrow in that situation.

    43     return mFrames.FirstChild() != mFrames.LastChild() ||

    44            !mFrames.FirstChild();

    45   }

    47 protected:

    48   nsMathMLmrowFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}

    49   virtual ~nsMathMLmrowFrame();

    50 };

    52 #endif /* nsMathMLmrowFrame_h___ */

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