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Diffstat (limited to '')
-rw-r--r-- | layout/mathml/nsMathMLmrowFrame.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmrowFrame.h b/layout/mathml/nsMathMLmrowFrame.h new file mode 100644 index 0000000000..fd79b0c520 --- /dev/null +++ b/layout/mathml/nsMathMLmrowFrame.h @@ -0,0 +1,56 @@ +/* -*- 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 nsMathMLmrowFrame_h___ +#define nsMathMLmrowFrame_h___ + +#include "mozilla/Attributes.h" +#include "nsMathMLContainerFrame.h" + +namespace mozilla { +class PresShell; +} // namespace mozilla + +// +// <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 final : public nsMathMLContainerFrame { + public: + NS_DECL_FRAMEARENA_HELPERS(nsMathMLmrowFrame) + + friend nsIFrame* NS_NewMathMLmrowFrame(mozilla::PresShell* aPresShell, + ComputedStyle* aStyle); + + virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* 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(ComputedStyle* aStyle, nsPresContext* aPresContext) + : nsMathMLContainerFrame(aStyle, aPresContext, kClassID) {} + virtual ~nsMathMLmrowFrame(); +}; + +#endif /* nsMathMLmrowFrame_h___ */ |