gecko-dev/layout/mathml/nsMathMLmsqrtFrame.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.
*
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* 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):
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* Roger B. Sidje <rbs@maths.uq.edu.au>
* David J. Fiddes <D.J.Fiddes@hw.ac.uk>
* Vilya Harvey <vilya@nag.co.uk>
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* Shyjan Mahamud <mahamud@cs.cmu.edu>
* Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
*
* 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 ***** */
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#include "nsMathMLmsqrtFrame.h"
//
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// <msqrt> -- form a radical - implementation
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//
//NOTE:
// The code assumes that TeX fonts are picked.
// There is no fall-back to draw the branches of the sqrt explicitly
// in the case where TeX fonts are not there. In general, there are no
// fall-back(s) in MathML when some (freely-downloadable) fonts are missing.
// Otherwise, this will add much work and unnecessary complexity to the core
// MathML engine. Assuming that authors have the free fonts is part of the
// deal. We are not responsible for cases of misconfigurations out there.
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nsIFrame*
NS_NewMathMLmsqrtFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
return new (aPresShell) nsMathMLmsqrtFrame(aContext);
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}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmsqrtFrame)
nsMathMLmsqrtFrame::nsMathMLmsqrtFrame(nsStyleContext* aContext) :
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nsMathMLmencloseFrame(aContext)
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{
}
nsMathMLmsqrtFrame::~nsMathMLmsqrtFrame()
{
}
NS_IMETHODIMP
nsMathMLmsqrtFrame::Init(nsIContent* aContent,
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nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
nsresult rv = nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
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AllocateMathMLChar(NOTATION_RADICAL);
mNotationsToDraw |= NOTATION_RADICAL;
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return rv;
}
NS_IMETHODIMP
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nsMathMLmsqrtFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
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{
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return nsMathMLContainerFrame::
AttributeChanged(aNameSpaceID, aAttribute, aModType);
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}