layout/mathml/nsMathMLmphantomFrame.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla MathML Project.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * The University Of Queensland.
  19  * Portions created by the Initial Developer are Copyright (C) 1999
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *   Roger B. Sidje <rbs@maths.uq.edu.au>
  24  *   David J. Fiddes <D.J.Fiddes@hw.ac.uk>
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either of the GNU General Public License Version 2 or later (the "GPL"),
  28  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  36  * the terms of any one of the MPL, the GPL or the LGPL.
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  38  * ***** END LICENSE BLOCK ***** */
  39
  40
  41 #include "nsCOMPtr.h"
  42 #include "nsFrame.h"
  43 #include "nsPresContext.h"
  44 #include "nsStyleConsts.h"
  45 #include "nsIRenderingContext.h"
  46 #include "nsIFontMetrics.h"
  47
  48 #include "nsMathMLmphantomFrame.h"
  49
  50 //
  51 // <mphantom> -- make content invisible but preserve its size
  52 //
  53
  54 nsIFrame*
  55 NS_NewMathMLmphantomFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
  56 {
  57   return new (aPresShell) nsMathMLmphantomFrame(aContext);
  58 }
  59
  60 NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmphantomFrame)
  61
  62 nsMathMLmphantomFrame::~nsMathMLmphantomFrame()
  63 {
  64 }
  65
  66 NS_IMETHODIMP
  67 nsMathMLmphantomFrame::InheritAutomaticData(nsIFrame* aParent)
  68 {
  69   // let the base class get the default from our parent
  70   nsMathMLContainerFrame::InheritAutomaticData(aParent);
  71
  72   mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
  73
  74   return NS_OK;
  75 }