gecko/layout/mathml/nsMathMLmrowFrame.cpp
2012-05-21 12:12:37 +01:00

66 lines
2.0 KiB
C++

/* -*- 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/. */
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsMathMLmrowFrame.h"
//
// <mrow> -- horizontally group any number of subexpressions - implementation
//
nsIFrame*
NS_NewMathMLmrowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLmrowFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmrowFrame)
nsMathMLmrowFrame::~nsMathMLmrowFrame()
{
}
NS_IMETHODIMP
nsMathMLmrowFrame::InheritAutomaticData(nsIFrame* aParent)
{
// let the base class get the default from our parent
nsMathMLContainerFrame::InheritAutomaticData(aParent);
mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
if (mContent->Tag() == nsGkAtoms::mrow_) {
// see if the directionality attribute is there
nsMathMLFrame::FindAttrDirectionality(mContent, mPresentationData);
}
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmrowFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 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->Tag() == nsGkAtoms::mtable_) {
nsIFrame* frame = mFrames.FirstChild();
for ( ; frame; frame = frame->GetFirstPrincipalChild()) {
// drill down to the real mtable
if (frame->GetType() == nsGkAtoms::tableOuterFrame)
return frame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
NS_NOTREACHED("mtable wrapper without the real table frame");
}
return nsMathMLContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}