layout/mathml/nsMathMLmphantomFrame.h

   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"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
  31  * under the terms of either the GPL or the LGPL, and not to allow others to
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  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39
  40 #ifndef nsMathMLmphantomFrame_h___
  41 #define nsMathMLmphantomFrame_h___
  42
  43 #include "nsCOMPtr.h"
  44 #include "nsMathMLContainerFrame.h"
  45
  46 //
  47 // <mphantom> -- make content invisible but preserve its size
  48 //
  49
  50 class nsMathMLmphantomFrame : public nsMathMLContainerFrame {
  51 public:
  52   NS_DECL_FRAMEARENA_HELPERS
  53
  54   friend nsIFrame* NS_NewMathMLmphantomFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  55
  56   NS_IMETHOD
  57   InheritAutomaticData(nsIFrame* aParent);
  58
  59   NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  60                               const nsRect&           aDirtyRect,
  61                               const nsDisplayListSet& aLists) { return NS_OK; }
  62
  63 protected:
  64   nsMathMLmphantomFrame(nsStyleContext* aContext)
  65     : nsMathMLContainerFrame(aContext) {}
  66   virtual ~nsMathMLmphantomFrame();
  67
  68   virtual PRIntn GetSkipSides() const { return 0; }
  69 };
  70
  71 #endif /* nsMathMLmphantomFrame_h___ */