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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 */
#include "nsMathMLmrowFrame.h"
#include "mozilla/PresShell.h"
#include "mozilla/gfx/2D.h"
using namespace mozilla;
// <mrow> -- horizontally group any number of subexpressions - implementation
nsIFrame* NS_NewMathMLmrowFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell)
nsMathMLmrowFrame(aStyle, aPresShell->GetPresContext());
nsMathMLmrowFrame::~nsMathMLmrowFrame() = default;
nsMathMLmrowFrame::InheritAutomaticData(nsIFrame* aParent) {
// let the base class get the default from our parent
return NS_OK;
nsresult nsMathMLmrowFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
// Special for <mtable>: In the frame construction code, we also use
// this frame class as a wrapper for mtable. Hence, we should pass the
// notification to the real mtable
if (mContent->IsMathMLElement(nsGkAtoms::mtable_)) {
nsIFrame* frame = mFrames.FirstChild();
for (; frame; frame = frame->PrincipalChildList().FirstChild()) {
// drill down to the real mtable
if (frame->IsTableWrapperFrame())
return frame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
MOZ_ASSERT_UNREACHABLE("mtable wrapper without the real table frame");
return nsMathMLContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
/* virtual */
eMathMLFrameType nsMathMLmrowFrame::GetMathMLFrameType() {
if (!IsMrowLike()) {
nsIMathMLFrame* child = do_QueryFrame(mFrames.FirstChild());
if (child) {
// We only have one child, so we return the frame type of that child as if
// we didn't exist.
return child->GetMathMLFrameType();
return nsMathMLFrame::GetMathMLFrameType();