/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 nsMathMLmsqrtFrame_h___

#define nsMathMLmsqrtFrame_h___

#include "mozilla/Attributes.h"

#include "nsMathMLmencloseFrame.h"

//

// <msqrt> -- form a radical

//

/*

The MathML REC describes:

The <msqrt> element is used to display square roots.

The syntax for <msqrt> is:

  <msqrt> base </msqrt>

Attributes of <msqrt> and <mroot>:

None (except the attributes allowed for all MathML elements, listed in Section

2.3.4).

The <mroot> element increments scriptlevel by 2, and sets displaystyle to

"false", within index, but leaves both attributes unchanged within base. The

<msqrt> element leaves both attributes unchanged within all its arguments.

These attributes are inherited by every element from its rendering environment,

but can be set explicitly only on <mstyle>. (See Section 3.3.4.)

*/

class nsMathMLmsqrtFrame final : public nsMathMLmencloseFrame

{

public:

  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmsqrtFrame)

  friend nsIFrame* NS_NewMathMLmsqrtFrame(nsIPresShell*   aPresShell,

                                          ComputedStyle* aStyle);

  virtual void

  Init(nsIContent*       aContent,

       nsContainerFrame* aParent,

       nsIFrame*         aPrevInFlow) override;

  NS_IMETHOD

  InheritAutomaticData(nsIFrame* aParent) override;

  virtual nsresult

  AttributeChanged(int32_t         aNameSpaceID,

                   nsAtom*        aAttribute,

                   int32_t         aModType) override;

  virtual bool

  IsMrowLike() override

  {

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

           !mFrames.FirstChild();

  }

protected:

  explicit nsMathMLmsqrtFrame(ComputedStyle* aStyle);

  virtual ~nsMathMLmsqrtFrame();

};

#endif /* nsMathMLmsqrtFrame_h___ */