gecko-dev/layout/mathml/nsMathMLmrowFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla MathML Project.
*
* The Initial Developer of the Original Code is
* The University Of Queensland.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Roger B. Sidje <rbs@maths.uq.edu.au>
* David J. Fiddes <D.J.Fiddes@hw.ac.uk>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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;
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);
}