LCOV - code coverage report
Current view: directory - layout/base - nsCSSRendering.h (source / functions) Found Hit Coverage
Test: app.info Lines: 6 0 0.0 %
Date: 2012-06-02 Functions: 3 0 0.0 %

       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.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : /* utility functions for drawing borders and backgrounds */
      39                 : 
      40                 : #ifndef nsCSSRendering_h___
      41                 : #define nsCSSRendering_h___
      42                 : 
      43                 : #include "nsStyleConsts.h"
      44                 : #include "gfxBlur.h"
      45                 : #include "gfxContext.h"
      46                 : #include "gfxImageSurface.h"
      47                 : 
      48                 : struct nsPoint;
      49                 : class nsStyleContext;
      50                 : class nsPresContext;
      51                 : class nsRenderingContext;
      52                 : 
      53                 : struct nsCSSRendering {
      54                 :   /**
      55                 :    * Initialize any static variables used by nsCSSRendering.
      56                 :    */
      57                 :   static void Init();
      58                 :   
      59                 :   /**
      60                 :    * Clean up any static variables used by nsCSSRendering.
      61                 :    */
      62                 :   static void Shutdown();
      63                 :   
      64                 :   static void PaintBoxShadowInner(nsPresContext* aPresContext,
      65                 :                                   nsRenderingContext& aRenderingContext,
      66                 :                                   nsIFrame* aForFrame,
      67                 :                                   const nsRect& aFrameArea,
      68                 :                                   const nsRect& aDirtyRect);
      69                 : 
      70                 :   static void PaintBoxShadowOuter(nsPresContext* aPresContext,
      71                 :                                   nsRenderingContext& aRenderingContext,
      72                 :                                   nsIFrame* aForFrame,
      73                 :                                   const nsRect& aFrameArea,
      74                 :                                   const nsRect& aDirtyRect);
      75                 : 
      76                 :   static void ComputePixelRadii(const nscoord *aAppUnitsRadii,
      77                 :                                 nscoord aAppUnitsPerPixel,
      78                 :                                 gfxCornerSizes *oBorderRadii);
      79                 : 
      80                 :   /**
      81                 :    * Render the border for an element using css rendering rules
      82                 :    * for borders. aSkipSides is a bitmask of the sides to skip
      83                 :    * when rendering. If 0 then no sides are skipped.
      84                 :    */
      85                 :   static void PaintBorder(nsPresContext* aPresContext,
      86                 :                           nsRenderingContext& aRenderingContext,
      87                 :                           nsIFrame* aForFrame,
      88                 :                           const nsRect& aDirtyRect,
      89                 :                           const nsRect& aBorderArea,
      90                 :                           nsStyleContext* aStyleContext,
      91                 :                           PRIntn aSkipSides = 0);
      92                 : 
      93                 :   /**
      94                 :    * Like PaintBorder, but taking an nsStyleBorder argument instead of
      95                 :    * getting it from aStyleContext.
      96                 :    */
      97                 :   static void PaintBorderWithStyleBorder(nsPresContext* aPresContext,
      98                 :                                          nsRenderingContext& aRenderingContext,
      99                 :                                          nsIFrame* aForFrame,
     100                 :                                          const nsRect& aDirtyRect,
     101                 :                                          const nsRect& aBorderArea,
     102                 :                                          const nsStyleBorder& aBorderStyle,
     103                 :                                          nsStyleContext* aStyleContext,
     104                 :                                          PRIntn aSkipSides = 0);
     105                 : 
     106                 : 
     107                 :   /**
     108                 :    * Render the outline for an element using css rendering rules
     109                 :    * for borders. aSkipSides is a bitmask of the sides to skip
     110                 :    * when rendering. If 0 then no sides are skipped.
     111                 :    */
     112                 :   static void PaintOutline(nsPresContext* aPresContext,
     113                 :                           nsRenderingContext& aRenderingContext,
     114                 :                           nsIFrame* aForFrame,
     115                 :                           const nsRect& aDirtyRect,
     116                 :                           const nsRect& aBorderArea,
     117                 :                           nsStyleContext* aStyleContext);
     118                 : 
     119                 :   /**
     120                 :    * Render keyboard focus on an element.
     121                 :    * |aFocusRect| is the outer rectangle of the focused element.
     122                 :    * Uses a fixed style equivalent to "1px dotted |aColor|".
     123                 :    * Not used for controls, because the native theme may differ.
     124                 :    */
     125                 :   static void PaintFocus(nsPresContext* aPresContext,
     126                 :                          nsRenderingContext& aRenderingContext,
     127                 :                          const nsRect& aFocusRect,
     128                 :                          nscolor aColor);
     129                 : 
     130                 :   /**
     131                 :    * Render a gradient for an element.
     132                 :    */
     133                 :   static void PaintGradient(nsPresContext* aPresContext,
     134                 :                             nsRenderingContext& aRenderingContext,
     135                 :                             nsStyleGradient* aGradient,
     136                 :                             const nsRect& aDirtyRect,
     137                 :                             const nsRect& aOneCellArea,
     138                 :                             const nsRect& aFillArea);
     139                 : 
     140                 :   /**
     141                 :    * Find the frame whose background style should be used to draw the
     142                 :    * canvas background. aForFrame must be the frame for the root element
     143                 :    * whose background style should be used. This function will return
     144                 :    * aForFrame unless the <body> background should be propagated, in
     145                 :    * which case we return the frame associated with the <body>'s background.
     146                 :    */
     147                 :   static nsIFrame* FindBackgroundStyleFrame(nsIFrame* aForFrame);
     148                 : 
     149                 :   /**
     150                 :    * @return true if |aFrame| is a canvas frame, in the CSS sense.
     151                 :    */
     152                 :   static bool IsCanvasFrame(nsIFrame* aFrame);
     153                 : 
     154                 :   /**
     155                 :    * Fill in an aBackgroundSC to be used to paint the background
     156                 :    * for an element.  This applies the rules for propagating
     157                 :    * backgrounds between BODY, the root element, and the canvas.
     158                 :    * @return true if there is some meaningful background.
     159                 :    */
     160                 :   static bool FindBackground(nsPresContext* aPresContext,
     161                 :                                nsIFrame* aForFrame,
     162                 :                                nsStyleContext** aBackgroundSC);
     163                 : 
     164                 :   /**
     165                 :    * As FindBackground, but the passed-in frame is known to be a root frame
     166                 :    * (returned from nsCSSFrameConstructor::GetRootElementStyleFrame())
     167                 :    * and there is always some meaningful background returned.
     168                 :    */
     169                 :   static nsStyleContext* FindRootFrameBackground(nsIFrame* aForFrame);
     170                 : 
     171                 :   /**
     172                 :    * Returns background style information for the canvas.
     173                 :    *
     174                 :    * @param aForFrame
     175                 :    *   the frame used to represent the canvas, in the CSS sense (i.e.
     176                 :    *   nsCSSRendering::IsCanvasFrame(aForFrame) must be true)
     177                 :    * @param aRootElementFrame
     178                 :    *   the frame representing the root element of the document
     179                 :    * @param aBackground
     180                 :    *   contains background style information for the canvas on return
     181                 :    */
     182                 :   static nsStyleContext*
     183               0 :   FindCanvasBackground(nsIFrame* aForFrame, nsIFrame* aRootElementFrame)
     184                 :   {
     185               0 :     NS_ABORT_IF_FALSE(IsCanvasFrame(aForFrame), "not a canvas frame");
     186               0 :     if (aRootElementFrame)
     187               0 :       return FindRootFrameBackground(aRootElementFrame);
     188                 : 
     189                 :     // This should always give transparent, so we'll fill it in with the
     190                 :     // default color if needed.  This seems to happen a bit while a page is
     191                 :     // being loaded.
     192               0 :     return aForFrame->GetStyleContext();
     193                 :   }
     194                 : 
     195                 :   /**
     196                 :    * Find a frame which draws a non-transparent background,
     197                 :    * for various table-related and HR-related backwards-compatibility hacks.
     198                 :    * This function will also stop if it finds themed frame which might draw
     199                 :    * background.
     200                 :    *
     201                 :    * Be very hesitant if you're considering calling this function -- it's
     202                 :    * usually not what you want.
     203                 :    */
     204                 :   static nsIFrame*
     205                 :   FindNonTransparentBackgroundFrame(nsIFrame* aFrame,
     206                 :                                     bool aStartAtParent = false);
     207                 : 
     208                 :   /**
     209                 :    * Determine the background color to draw taking into account print settings.
     210                 :    */
     211                 :   static nscolor
     212                 :   DetermineBackgroundColor(nsPresContext* aPresContext,
     213                 :                            nsStyleContext* aStyleContext,
     214                 :                            nsIFrame* aFrame);
     215                 : 
     216                 :   /**
     217                 :    * Render the background for an element using css rendering rules
     218                 :    * for backgrounds.
     219                 :    */
     220                 :   enum {
     221                 :     /**
     222                 :      * When this flag is passed, the element's nsDisplayBorder will be
     223                 :      * painted immediately on top of this background.
     224                 :      */
     225                 :     PAINTBG_WILL_PAINT_BORDER = 0x01,
     226                 :     /**
     227                 :      * When this flag is passed, images are synchronously decoded.
     228                 :      */
     229                 :     PAINTBG_SYNC_DECODE_IMAGES = 0x02,
     230                 :     /**
     231                 :      * When this flag is passed, painting will go to the screen so we can
     232                 :      * take advantage of the fact that it will be clipped to the viewport.
     233                 :      */
     234                 :     PAINTBG_TO_WINDOW = 0x04
     235                 :   };
     236                 :   static void PaintBackground(nsPresContext* aPresContext,
     237                 :                               nsRenderingContext& aRenderingContext,
     238                 :                               nsIFrame* aForFrame,
     239                 :                               const nsRect& aDirtyRect,
     240                 :                               const nsRect& aBorderArea,
     241                 :                               PRUint32 aFlags,
     242                 :                               nsRect* aBGClipRect = nsnull);
     243                 : 
     244                 :   /**
     245                 :    * Same as |PaintBackground|, except using the provided style structs.
     246                 :    * This short-circuits the code that ensures that the root element's
     247                 :    * background is drawn on the canvas.
     248                 :    */
     249                 :   static void PaintBackgroundWithSC(nsPresContext* aPresContext,
     250                 :                                     nsRenderingContext& aRenderingContext,
     251                 :                                     nsIFrame* aForFrame,
     252                 :                                     const nsRect& aDirtyRect,
     253                 :                                     const nsRect& aBorderArea,
     254                 :                                     nsStyleContext *aStyleContext,
     255                 :                                     const nsStyleBorder& aBorder,
     256                 :                                     PRUint32 aFlags,
     257                 :                                     nsRect* aBGClipRect = nsnull);
     258                 : 
     259                 :   /**
     260                 :    * Returns the rectangle covered by the given background layer image, taking
     261                 :    * into account background positioning, sizing, and repetition, but not
     262                 :    * clipping.
     263                 :    */
     264                 :   static nsRect GetBackgroundLayerRect(nsPresContext* aPresContext,
     265                 :                                        nsIFrame* aForFrame,
     266                 :                                        const nsRect& aBorderArea,
     267                 :                                        const nsStyleBackground& aBackground,
     268                 :                                        const nsStyleBackground::Layer& aLayer);
     269                 : 
     270                 :   /**
     271                 :    * Called by the presShell when painting is finished, so we can clear our
     272                 :    * inline background data cache.
     273                 :    */
     274                 :   static void DidPaint();
     275                 : 
     276                 :   // Draw a border segment in the table collapsing border model without
     277                 :   // beveling corners
     278                 :   static void DrawTableBorderSegment(nsRenderingContext& aContext,
     279                 :                                      PRUint8              aBorderStyle,  
     280                 :                                      nscolor              aBorderColor,
     281                 :                                      const nsStyleBackground* aBGColor,
     282                 :                                      const nsRect&        aBorderRect,
     283                 :                                      PRInt32              aAppUnitsPerCSSPixel,
     284                 :                                      PRUint8              aStartBevelSide = 0,
     285                 :                                      nscoord              aStartBevelOffset = 0,
     286                 :                                      PRUint8              aEndBevelSide = 0,
     287                 :                                      nscoord              aEndBevelOffset = 0);
     288                 : 
     289                 :   /**
     290                 :    * Function for painting the decoration lines for the text.
     291                 :    * NOTE: aPt, aLineSize, aAscent and aOffset are non-rounded device pixels,
     292                 :    *       not app units.
     293                 :    *   input:
     294                 :    *     @param aGfxContext
     295                 :    *     @param aDirtyRect        no need to paint outside this rect
     296                 :    *     @param aColor            the color of the decoration line
     297                 :    *     @param aPt               the top/left edge of the text
     298                 :    *     @param aLineSize         the width and the height of the decoration
     299                 :    *                              line
     300                 :    *     @param aAscent           the ascent of the text
     301                 :    *     @param aOffset           the offset of the decoration line from
     302                 :    *                              the baseline of the text (if the value is
     303                 :    *                              positive, the line is lifted up)
     304                 :    *     @param aDecoration       which line will be painted. The value can be
     305                 :    *                              NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE or
     306                 :    *                              NS_STYLE_TEXT_DECORATION_LINE_OVERLINE or
     307                 :    *                              NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH.
     308                 :    *     @param aStyle            the style of the decoration line such as
     309                 :    *                              NS_STYLE_TEXT_DECORATION_STYLE_*.
     310                 :    *     @param aDescentLimit     If aDescentLimit is zero or larger and the
     311                 :    *                              underline overflows from the descent space,
     312                 :    *                              the underline should be lifted up as far as
     313                 :    *                              possible.  Note that this does not mean the
     314                 :    *                              underline never overflows from this
     315                 :    *                              limitation.  Because if the underline is
     316                 :    *                              positioned to the baseline or upper, it causes
     317                 :    *                              unreadability.  Note that if this is zero
     318                 :    *                              or larger, the underline rect may be shrunken
     319                 :    *                              if it's possible.  Therefore, this value is
     320                 :    *                              used for strikeout line and overline too.
     321                 :    */
     322                 :   static void PaintDecorationLine(gfxContext* aGfxContext,
     323                 :                                   const gfxRect& aDirtyRect,
     324                 :                                   const nscolor aColor,
     325                 :                                   const gfxPoint& aPt,
     326                 :                                   const gfxSize& aLineSize,
     327                 :                                   const gfxFloat aAscent,
     328                 :                                   const gfxFloat aOffset,
     329                 :                                   const PRUint8 aDecoration,
     330                 :                                   const PRUint8 aStyle,
     331                 :                                   const gfxFloat aDescentLimit = -1.0);
     332                 : 
     333                 :   /**
     334                 :    * Function for getting the decoration line rect for the text.
     335                 :    * NOTE: aLineSize, aAscent and aOffset are non-rounded device pixels,
     336                 :    *       not app units.
     337                 :    *   input:
     338                 :    *     @param aPresContext
     339                 :    *     @param aLineSize         the width and the height of the decoration
     340                 :    *                              line
     341                 :    *     @param aAscent           the ascent of the text
     342                 :    *     @param aOffset           the offset of the decoration line from
     343                 :    *                              the baseline of the text (if the value is
     344                 :    *                              positive, the line is lifted up)
     345                 :    *     @param aDecoration       which line will be painted. The value can be
     346                 :    *                              NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE or
     347                 :    *                              NS_STYLE_TEXT_DECORATION_LINE_OVERLINE or
     348                 :    *                              NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH.
     349                 :    *     @param aStyle            the style of the decoration line such as
     350                 :    *                              NS_STYLE_TEXT_DECORATION_STYLE_*.
     351                 :    *     @param aDescentLimit     If aDescentLimit is zero or larger and the
     352                 :    *                              underline overflows from the descent space,
     353                 :    *                              the underline should be lifted up as far as
     354                 :    *                              possible.  Note that this does not mean the
     355                 :    *                              underline never overflows from this
     356                 :    *                              limitation.  Because if the underline is
     357                 :    *                              positioned to the baseline or upper, it causes
     358                 :    *                              unreadability.  Note that if this is zero
     359                 :    *                              or larger, the underline rect may be shrunken
     360                 :    *                              if it's possible.  Therefore, this value is
     361                 :    *                              used for strikeout line and overline too.
     362                 :    *   output:
     363                 :    *     @return                  the decoration line rect for the input,
     364                 :    *                              the each values are app units.
     365                 :    */
     366                 :   static nsRect GetTextDecorationRect(nsPresContext* aPresContext,
     367                 :                                       const gfxSize& aLineSize,
     368                 :                                       const gfxFloat aAscent,
     369                 :                                       const gfxFloat aOffset,
     370                 :                                       const PRUint8 aDecoration,
     371                 :                                       const PRUint8 aStyle,
     372                 :                                       const gfxFloat aDescentLimit = -1.0);
     373                 : 
     374                 : protected:
     375                 :   static gfxRect GetTextDecorationRectInternal(const gfxPoint& aPt,
     376                 :                                                const gfxSize& aLineSize,
     377                 :                                                const gfxFloat aAscent,
     378                 :                                                const gfxFloat aOffset,
     379                 :                                                const PRUint8 aDecoration,
     380                 :                                                const PRUint8 aStyle,
     381                 :                                                const gfxFloat aDscentLimit);
     382                 : };
     383                 : 
     384                 : /*
     385                 :  * nsContextBoxBlur
     386                 :  * Creates an 8-bit alpha channel context for callers to draw in, blurs the
     387                 :  * contents of that context and applies it as a 1-color mask on a
     388                 :  * different existing context. Uses gfxAlphaBoxBlur as its back end.
     389                 :  *
     390                 :  * You must call Init() first to create a suitable temporary surface to draw
     391                 :  * on.  You must then draw any desired content onto the given context, then
     392                 :  * call DoPaint() to apply the blurred content as a single-color mask. You
     393                 :  * can only call Init() once, so objects cannot be reused.
     394                 :  *
     395                 :  * This is very useful for creating drop shadows or silhouettes.
     396                 :  */
     397               0 : class nsContextBoxBlur {
     398                 : public:
     399                 :   enum {
     400                 :     FORCE_MASK = 0x01
     401                 :   };
     402                 :   /**
     403                 :    * Prepares a gfxContext to draw on. Do not call this twice; if you want
     404                 :    * to get the gfxContext again use GetContext().
     405                 :    *
     406                 :    * @param aRect                The coordinates of the surface to create.
     407                 :    *                             All coordinates must be in app units.
     408                 :    *                             This must not include the blur radius, pass
     409                 :    *                             it as the second parameter and everything
     410                 :    *                             is taken care of.
     411                 :    *
     412                 :    * @param aBlurRadius          The blur radius in app units.
     413                 :    *
     414                 :    * @param aAppUnitsPerDevPixel The number of app units in a device pixel,
     415                 :    *                             for conversion.  Most of the time you'll
     416                 :    *                             pass this from the current PresContext if
     417                 :    *                             available.
     418                 :    *
     419                 :    * @param aDestinationCtx      The graphics context to apply the blurred
     420                 :    *                             mask to when you call DoPaint(). Make sure
     421                 :    *                             it is not destroyed before you call
     422                 :    *                             DoPaint(). To set the color of the
     423                 :    *                             resulting blurred graphic mask, you must
     424                 :    *                             set the color on this context before
     425                 :    *                             calling Init().
     426                 :    *
     427                 :    * @param aDirtyRect           The absolute dirty rect in app units. Used to
     428                 :    *                             optimize the temporary surface size and speed up blur.
     429                 :    *
     430                 :    * @param aSkipRect            An area in device pixels (NOT app units!) to avoid
     431                 :    *                             blurring over, to prevent unnecessary work.
     432                 :    *                             
     433                 :    * @param aFlags               FORCE_MASK to ensure that the content drawn to the
     434                 :    *                             returned gfxContext is used as a mask, and not
     435                 :    *                             drawn directly to aDestinationCtx.
     436                 :    *
     437                 :    * @return            A blank 8-bit alpha-channel-only graphics context to
     438                 :    *                    draw on, or null on error. Must not be freed. The
     439                 :    *                    context has a device offset applied to it given by
     440                 :    *                    aRect. This means you can use coordinates as if it
     441                 :    *                    were at the desired position at aRect and you don't
     442                 :    *                    need to worry about translating any coordinates to
     443                 :    *                    draw on this temporary surface.
     444                 :    *
     445                 :    * If aBlurRadius is 0, the returned context is aDestinationCtx and
     446                 :    * DoPaint() does nothing, because no blurring is required. Therefore, you
     447                 :    * should prepare the destination context as if you were going to draw
     448                 :    * directly on it instead of any temporary surface created in this class.
     449                 :    */
     450                 :   gfxContext* Init(const nsRect& aRect, nscoord aSpreadRadius,
     451                 :                    nscoord aBlurRadius,
     452                 :                    PRInt32 aAppUnitsPerDevPixel, gfxContext* aDestinationCtx,
     453                 :                    const nsRect& aDirtyRect, const gfxRect* aSkipRect,
     454                 :                    PRUint32 aFlags = 0);
     455                 : 
     456                 :   /**
     457                 :    * Does the actual blurring/spreading. Users of this object *must*
     458                 :    * have called Init() first, then have drawn whatever they want to be
     459                 :    * blurred onto the internal gfxContext before calling this.
     460                 :    */
     461                 :   void DoEffects();
     462                 :   
     463                 :   /**
     464                 :    * Does the actual blurring and mask applying. Users of this object *must*
     465                 :    * have called Init() first, then have drawn whatever they want to be
     466                 :    * blurred onto the internal gfxContext before calling this.
     467                 :    */
     468                 :   void DoPaint();
     469                 : 
     470                 :   /**
     471                 :    * Gets the internal gfxContext at any time. Must not be freed. Avoid
     472                 :    * calling this before calling Init() since the context would not be
     473                 :    * constructed at that point.
     474                 :    */
     475                 :   gfxContext* GetContext();
     476                 : 
     477                 : 
     478                 :   /**
     479                 :    * Get the margin associated with the given blur radius, i.e., the
     480                 :    * additional area that might be painted as a result of it.  (The
     481                 :    * margin for a spread radius is itself, on all sides.)
     482                 :    */
     483                 :   static nsMargin GetBlurRadiusMargin(nscoord aBlurRadius,
     484                 :                                       PRInt32 aAppUnitsPerDevPixel);
     485                 : 
     486                 : protected:
     487                 :   gfxAlphaBoxBlur blur;
     488                 :   nsRefPtr<gfxContext> mContext;
     489                 :   gfxContext* mDestinationCtx;
     490                 :   
     491                 : };
     492                 : 
     493                 : #endif /* nsCSSRendering_h___ */

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