layout/mathml/base/src/nsMathMLmpaddedFrame.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  *   Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
  26  *
  27  * Alternatively, the contents of this file may be used under the terms of
  28  * either of the GNU General Public License Version 2 or later (the "GPL"),
  29  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  30  * in which case the provisions of the GPL or the LGPL are applicable instead
  31  * of those above. If you wish to allow use of your version of this file only
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  35  * and other provisions required by the GPL or the LGPL. If you do not delete
  36  * the provisions above, a recipient may use your version of this file under
  37  * the terms of any one of the MPL, the GPL or the LGPL.
  38  *
  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #ifndef nsMathMLmpaddedFrame_h___
  42 #define nsMathMLmpaddedFrame_h___
  43
  44 #include "nsCOMPtr.h"
  45 #include "nsMathMLContainerFrame.h"
  46
  47 //
  48 // <mpadded> -- adjust space around content
  49 //
  50
  51 class nsMathMLmpaddedFrame : public nsMathMLContainerFrame {
  52 public:
  53   friend nsIFrame* NS_NewMathMLmpaddedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  54
  55   NS_IMETHOD
  56   InheritAutomaticData(nsIFrame* aParent);
  57
  58   NS_IMETHOD
  59   Reflow(nsPresContext*          aPresContext,
  60          nsHTMLReflowMetrics&     aDesiredSize,
  61          const nsHTMLReflowState& aReflowState,
  62          nsReflowStatus&          aStatus);
  63
  64   virtual nsresult
  65   Place(nsIRenderingContext& aRenderingContext,
  66         PRBool               aPlaceOrigin,
  67         nsHTMLReflowMetrics& aDesiredSize);
  68
  69 protected:
  70   nsMathMLmpaddedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
  71   virtual ~nsMathMLmpaddedFrame();
  72
  73   virtual PRIntn GetSkipSides() const { return 0; }
  74
  75 private:
  76   nsCSSValue mWidth;
  77   nsCSSValue mHeight;
  78   nsCSSValue mDepth;
  79   nsCSSValue mLeftSpace;
  80
  81   PRInt32    mWidthSign;
  82   PRInt32    mHeightSign;
  83   PRInt32    mDepthSign;
  84   PRInt32    mLeftSpaceSign;
  85
  86   PRInt32    mWidthPseudoUnit;
  87   PRInt32    mHeightPseudoUnit;
  88   PRInt32    mDepthPseudoUnit;
  89   PRInt32    mLeftSpacePseudoUnit;
  90
  91   // helpers to process the attributes
  92   void
  93   ProcessAttributes();
  94
  95   static PRBool
  96   ParseAttribute(nsString&   aString,
  97                  PRInt32&    aSign,
  98                  nsCSSValue& aCSSValue,
  99                  PRInt32&    aPseudoUnit);
 100
 101   void
 102   UpdateValue(PRInt32                  aSign,
 103               PRInt32                  aPseudoUnit,
 104               const nsCSSValue&        aCSSValue,
 105               nscoord                  aLeftSpace,
 106               const nsBoundingMetrics& aBoundingMetrics,
 107               nscoord&                 aValueToUpdate) const;
 108 };
 109
 110 #endif /* nsMathMLmpaddedFrame_h___ */