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/* -*- 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"
namespace mozilla {
class PresShell;
} // namespace mozilla
//
// <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.)
*/
// XXXfredw: This class should share its layout logic with nsMathMLmrootFrame
// when the menclose "radical" notation is removed.
// See https://bugzilla.mozilla.org/show_bug.cgi?id=1548522
class nsMathMLmsqrtFrame final : public nsMathMLmencloseFrame {
public:
NS_DECL_FRAMEARENA_HELPERS(nsMathMLmsqrtFrame)
friend nsIFrame* NS_NewMathMLmsqrtFrame(mozilla::PresShell* 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,
nsPresContext* aPresContext);
virtual ~nsMathMLmsqrtFrame();
};
#endif /* nsMathMLmsqrtFrame_h___ */
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