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/* 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/. */
#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());
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmrowFrame)
nsMathMLmrowFrame::~nsMathMLmrowFrame() = default;
NS_IMETHODIMP
nsMathMLmrowFrame::InheritAutomaticData(nsIFrame* aParent) {
// let the base class get the default from our parent
nsMathMLContainerFrame::InheritAutomaticData(aParent);
mPresentationData.flags +=
MathMLPresentationFlag::StretchAllChildrenVertically;
return NS_OK;
}
nsresult nsMathMLmrowFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
AttrModType 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,
aModType);
}
/* virtual */
MathMLFrameType 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();
}