The Tor Browser: layout/mathml/nsMathMLmencloseFrame.h@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef nsMathMLmencloseFrame_h___

     8 #define nsMathMLmencloseFrame_h___

    10 #include "mozilla/Attributes.h"

    11 #include "nsMathMLContainerFrame.h"

    13 //

    14 // <menclose> -- enclose content with a stretching symbol such

    15 // as a long division sign.

    16 //

    18 /*

    19   The MathML REC describes:

    21   The menclose element renders its content inside the enclosing notation

    22   specified by its notation attribute. menclose accepts any number of arguments;

    23   if this number is not 1, its contents are treated as a single "inferred mrow"

    24   containing its arguments, as described in Section 3.1.3 Required Arguments.

    25 */

    27 enum nsMencloseNotation

    28   {

    29     NOTATION_LONGDIV = 0x1,

    30     NOTATION_RADICAL = 0x2,

    31     NOTATION_ROUNDEDBOX = 0x4,

    32     NOTATION_CIRCLE = 0x8,

    33     NOTATION_LEFT = 0x10,

    34     NOTATION_RIGHT = 0x20,

    35     NOTATION_TOP = 0x40,

    36     NOTATION_BOTTOM = 0x80,

    37     NOTATION_UPDIAGONALSTRIKE = 0x100,

    38     NOTATION_DOWNDIAGONALSTRIKE = 0x200,

    39     NOTATION_VERTICALSTRIKE = 0x400,

    40     NOTATION_HORIZONTALSTRIKE = 0x800,

    41     NOTATION_UPDIAGONALARROW = 0x1000

    42   };

    44 class nsMathMLmencloseFrame : public nsMathMLContainerFrame {

    45 public:

    46   NS_DECL_FRAMEARENA_HELPERS

    48   friend nsIFrame* NS_NewMathMLmencloseFrame(nsIPresShell*   aPresShell,

    49                                              nsStyleContext* aContext);

    51   virtual nsresult

    52   Place(nsRenderingContext& aRenderingContext,

    53         bool                 aPlaceOrigin,

    54         nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;

    56   virtual nsresult

    57   MeasureForWidth(nsRenderingContext& aRenderingContext,

    58                   nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;

    60   virtual nsresult

    61   AttributeChanged(int32_t         aNameSpaceID,

    62                    nsIAtom*        aAttribute,

    63                    int32_t         aModType) MOZ_OVERRIDE;

    65   virtual void

    66   SetAdditionalStyleContext(int32_t          aIndex,

    67                             nsStyleContext*  aStyleContext) MOZ_OVERRIDE;

    68   virtual nsStyleContext*

    69   GetAdditionalStyleContext(int32_t aIndex) const MOZ_OVERRIDE;

    71   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,

    72                                 const nsRect&           aDirtyRect,

    73                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;

    75   NS_IMETHOD

    76   InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;

    78   NS_IMETHOD

    79   TransmitAutomaticData() MOZ_OVERRIDE;

    81   virtual nscoord

    82   FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;

    84   bool

    85   IsMrowLike() MOZ_OVERRIDE {

    86     return mFrames.FirstChild() != mFrames.LastChild() ||

    87            !mFrames.FirstChild();

    88   }

    90 protected:

    91   nsMathMLmencloseFrame(nsStyleContext* aContext);

    92   virtual ~nsMathMLmencloseFrame();

    94   nsresult PlaceInternal(nsRenderingContext& aRenderingContext,

    95                          bool                 aPlaceOrigin,

    96                          nsHTMLReflowMetrics& aDesiredSize,

    97                          bool                 aWidthOnly);

    99   // functions to parse the "notation" attribute.

   100   nsresult AddNotation(const nsAString& aNotation);

   101   void InitNotations();

   103   // Description of the notations to draw

   104   uint32_t mNotationsToDraw;

   105   bool IsToDraw(nsMencloseNotation mask)

   106   {

   107     return mask & mNotationsToDraw;

   108   }

   110   nscoord mRuleThickness;

   111   nsTArray<nsMathMLChar> mMathMLChar;

   112   int8_t mLongDivCharIndex, mRadicalCharIndex;

   113   nscoord mContentWidth;

   114   nsresult AllocateMathMLChar(nsMencloseNotation mask);

   116   // Display a frame of the specified type.

   117   // @param aType Type of frame to display

   118   void DisplayNotation(nsDisplayListBuilder* aBuilder,

   119                        nsIFrame* aFrame, const nsRect& aRect,

   120                        const nsDisplayListSet& aLists,

   121                        nscoord aThickness, nsMencloseNotation aType);

   122 };

   124 #endif /* nsMathMLmencloseFrame_h___ */

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