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-rw-r--r--layout/mathml/nsMathMLmrowFrame.h54
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diff --git a/layout/mathml/nsMathMLmrowFrame.h b/layout/mathml/nsMathMLmrowFrame.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 nsMathMLmrowFrame_h___
+#define nsMathMLmrowFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsMathMLContainerFrame.h"
+
+//
+// <mrow> -- horizontally group any number of subexpressions
+// <mphantom> -- make content invisible but preserve its size
+// <mstyle> -- make style changes that affect the rendering of its contents
+//
+
+class nsMathMLmrowFrame : public nsMathMLContainerFrame {
+public:
+ NS_DECL_FRAMEARENA_HELPERS
+
+ friend nsIFrame* NS_NewMathMLmrowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+
+ virtual nsresult
+ AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType) override;
+
+ NS_IMETHOD
+ InheritAutomaticData(nsIFrame* aParent) override;
+
+ NS_IMETHOD
+ TransmitAutomaticData() override {
+ return TransmitAutomaticDataForMrowLikeElement();
+ }
+
+ virtual eMathMLFrameType
+ GetMathMLFrameType() override;
+
+ bool
+ IsMrowLike() override {
+ // <mrow> elements with a single child are treated identically to the case
+ // where the child wasn't within an mrow, so we pretend the mrow isn't an
+ // mrow in that situation.
+ return mFrames.FirstChild() != mFrames.LastChild() ||
+ !mFrames.FirstChild();
+ }
+
+protected:
+ explicit nsMathMLmrowFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
+ virtual ~nsMathMLmrowFrame();
+};
+
+#endif /* nsMathMLmrowFrame_h___ */