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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___ */