layout/mathml/nsMathMLmoFrame.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  *   Shyjan Mahamud <mahamud@cs.cmu.edu>
  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
  32  * under the terms of either the GPL or the LGPL, and not to allow others to
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  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 nsMathMLmoFrame_h___
  42 #define nsMathMLmoFrame_h___
  43
  44 #include "nsCOMPtr.h"
  45 #include "nsMathMLTokenFrame.h"
  46
  47 //
  48 // <mo> -- operator, fence, or separator
  49 //
  50
  51 class nsMathMLmoFrame : public nsMathMLTokenFrame {
  52 public:
  53   NS_DECL_FRAMEARENA_HELPERS
  54
  55   friend nsIFrame* NS_NewMathMLmoFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  56
  57   virtual eMathMLFrameType GetMathMLFrameType();
  58
  59   virtual void
  60   SetAdditionalStyleContext(PRInt32          aIndex,
  61                             nsStyleContext*  aStyleContext);
  62   virtual nsStyleContext*
  63   GetAdditionalStyleContext(PRInt32 aIndex) const;
  64
  65   NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  66                               const nsRect&           aDirtyRect,
  67                               const nsDisplayListSet& aLists);
  68
  69   NS_IMETHOD
  70   InheritAutomaticData(nsIFrame* aParent);
  71
  72   NS_IMETHOD
  73   TransmitAutomaticData();
  74
  75   NS_IMETHOD
  76   Reflow(nsPresContext*          aPresContext,
  77          nsHTMLReflowMetrics&     aDesiredSize,
  78          const nsHTMLReflowState& aReflowState,
  79          nsReflowStatus&          aStatus);
  80
  81   virtual void MarkIntrinsicWidthsDirty();
  82
  83   virtual nscoord
  84   GetIntrinsicWidth(nsIRenderingContext *aRenderingContext);
  85
  86   NS_IMETHOD
  87   AttributeChanged(PRInt32         aNameSpaceID,
  88                    nsIAtom*        aAttribute,
  89                    PRInt32         aModType);
  90
  91   // This method is called by the parent frame to ask <mo>
  92   // to stretch itself.
  93   NS_IMETHOD
  94   Stretch(nsIRenderingContext& aRenderingContext,
  95           nsStretchDirection   aStretchDirection,
  96           nsBoundingMetrics&   aContainerSize,
  97           nsHTMLReflowMetrics& aDesiredStretchSize);
  98
  99 protected:
 100   nsMathMLmoFrame(nsStyleContext* aContext) : nsMathMLTokenFrame(aContext) {}
 101   virtual ~nsMathMLmoFrame();
 102
 103   virtual PRIntn GetSkipSides() const { return 0; }
 104
 105   nsMathMLChar     mMathMLChar; // Here is the MathMLChar that will deal with the operator.
 106   nsOperatorFlags  mFlags;
 107   float            mMinSize;
 108   float            mMaxSize;
 109
 110   PRBool UseMathMLChar();
 111
 112   // overload the base method so that we can setup our nsMathMLChar
 113   virtual void ProcessTextData();
 114
 115   // helper to get our 'form' and lookup in the Operator Dictionary to fetch
 116   // our default data that may come from there, and to complete the setup
 117   // using attributes that we may have
 118   void
 119   ProcessOperatorData();
 120
 121   // helper to double check thar our char should be rendered as a selected char
 122   PRBool
 123   IsFrameInSelection(nsIFrame* aFrame);
 124 };
 125
 126 #endif /* nsMathMLmoFrame_h___ */