LCOV - code coverage report
Current view: directory - layout/mathml - nsMathMLmencloseFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 380 0 0.0 %
Date: 2012-06-02 Functions: 26 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 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                 :  *   Vilya Harvey <vilya@nag.co.uk>
      26                 :  *   Shyjan Mahamud <mahamud@cs.cmu.edu>
      27                 :  *   Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
      28                 :  *   Frederic Wang <fred.wang@free.fr> - extension of <msqrt/> to <menclose/>
      29                 :  *
      30                 :  * Alternatively, the contents of this file may be used under the terms of
      31                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      32                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      33                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      34                 :  * of those above. If you wish to allow use of your version of this file only
      35                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      36                 :  * use your version of this file under the terms of the MPL, indicate your
      37                 :  * decision by deleting the provisions above and replace them with the notice
      38                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      39                 :  * the provisions above, a recipient may use your version of this file under
      40                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      41                 :  *
      42                 :  * ***** END LICENSE BLOCK ***** */
      43                 : 
      44                 : 
      45                 : #include "nsCOMPtr.h"
      46                 : #include "nsFrame.h"
      47                 : #include "nsPresContext.h"
      48                 : #include "nsStyleContext.h"
      49                 : #include "nsStyleConsts.h"
      50                 : #include "nsRenderingContext.h"
      51                 : #include "nsWhitespaceTokenizer.h"
      52                 : 
      53                 : #include "nsMathMLmencloseFrame.h"
      54                 : #include "nsDisplayList.h"
      55                 : #include "gfxContext.h"
      56                 : 
      57                 : //
      58                 : // <menclose> -- enclose content with a stretching symbol such
      59                 : // as a long division sign. - implementation
      60                 : 
      61                 : // longdiv:
      62                 : // Unicode 5.1 assigns U+27CC to LONG DIVISION, but a right parenthesis
      63                 : // renders better with current font support.
      64                 : static const PRUnichar kLongDivChar = ')';
      65                 : 
      66                 : // radical: 'SQUARE ROOT'
      67                 : static const PRUnichar kRadicalChar = 0x221A;
      68                 : 
      69                 : nsIFrame*
      70               0 : NS_NewMathMLmencloseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
      71                 : {
      72               0 :   return new (aPresShell) nsMathMLmencloseFrame(aContext);
      73                 : }
      74                 : 
      75               0 : NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmencloseFrame)
      76                 : 
      77               0 : nsMathMLmencloseFrame::nsMathMLmencloseFrame(nsStyleContext* aContext) :
      78                 :   nsMathMLContainerFrame(aContext), mNotationsToDraw(0),
      79               0 :   mLongDivCharIndex(-1), mRadicalCharIndex(-1), mContentWidth(0)
      80                 : {
      81               0 : }
      82                 : 
      83               0 : nsMathMLmencloseFrame::~nsMathMLmencloseFrame()
      84                 : {
      85               0 : }
      86                 : 
      87               0 : nsresult nsMathMLmencloseFrame::AllocateMathMLChar(nsMencloseNotation mask)
      88                 : {
      89                 :   // Is the char already allocated?
      90               0 :   if ((mask == NOTATION_LONGDIV && mLongDivCharIndex >= 0) ||
      91                 :       (mask == NOTATION_RADICAL && mRadicalCharIndex >= 0))
      92               0 :     return NS_OK;
      93                 : 
      94                 :   // No need to track the style context given to our MathML chars.
      95                 :   // The Style System will use Get/SetAdditionalStyleContext() to keep it
      96                 :   // up-to-date if dynamic changes arise.
      97               0 :   PRUint32 i = mMathMLChar.Length();
      98               0 :   nsAutoString Char;
      99                 : 
     100               0 :   if (!mMathMLChar.AppendElement())
     101               0 :     return NS_ERROR_OUT_OF_MEMORY;
     102                 : 
     103               0 :   if (mask == NOTATION_LONGDIV) {
     104               0 :     Char.Assign(kLongDivChar);
     105               0 :     mLongDivCharIndex = i;
     106               0 :   } else if (mask == NOTATION_RADICAL) {
     107               0 :     Char.Assign(kRadicalChar);
     108               0 :     mRadicalCharIndex = i;
     109                 :   }
     110                 : 
     111               0 :   nsPresContext *presContext = PresContext();
     112               0 :   mMathMLChar[i].SetData(presContext, Char);
     113                 :   ResolveMathMLCharStyle(presContext, mContent, mStyleContext,
     114               0 :                          &mMathMLChar[i],
     115               0 :                          true);
     116                 : 
     117               0 :   return NS_OK;
     118                 : }
     119                 : 
     120                 : /*
     121                 :  * Add a notation to draw, if the argument is the name of a known notation.
     122                 :  * @param aNotation string name of a notation
     123                 :  */
     124               0 : nsresult nsMathMLmencloseFrame::AddNotation(const nsAString& aNotation)
     125                 : {
     126                 :   nsresult rv;
     127                 : 
     128               0 :   if (aNotation.EqualsLiteral("longdiv")) {
     129               0 :     rv = AllocateMathMLChar(NOTATION_LONGDIV);
     130               0 :     NS_ENSURE_SUCCESS(rv, rv);
     131               0 :     mNotationsToDraw |= NOTATION_LONGDIV;
     132               0 :   } else if (aNotation.EqualsLiteral("actuarial")) {
     133               0 :     mNotationsToDraw |= (NOTATION_RIGHT | NOTATION_TOP);
     134               0 :   } else if (aNotation.EqualsLiteral("radical")) {
     135               0 :     rv = AllocateMathMLChar(NOTATION_RADICAL);
     136               0 :     NS_ENSURE_SUCCESS(rv, rv);
     137               0 :     mNotationsToDraw |= NOTATION_RADICAL;
     138               0 :   } else if (aNotation.EqualsLiteral("box")) {
     139                 :     mNotationsToDraw |= (NOTATION_LEFT | NOTATION_RIGHT |
     140               0 :                          NOTATION_TOP | NOTATION_BOTTOM);
     141               0 :   } else if (aNotation.EqualsLiteral("roundedbox")) {
     142               0 :     mNotationsToDraw |= NOTATION_ROUNDEDBOX;
     143               0 :   } else if (aNotation.EqualsLiteral("circle")) {
     144               0 :     mNotationsToDraw |= NOTATION_CIRCLE;
     145               0 :   } else if (aNotation.EqualsLiteral("left")) {
     146               0 :     mNotationsToDraw |= NOTATION_LEFT;
     147               0 :   } else if (aNotation.EqualsLiteral("right")) {
     148               0 :     mNotationsToDraw |= NOTATION_RIGHT;
     149               0 :   } else if (aNotation.EqualsLiteral("top")) {
     150               0 :     mNotationsToDraw |= NOTATION_TOP;
     151               0 :   } else if (aNotation.EqualsLiteral("bottom")) {
     152               0 :     mNotationsToDraw |= NOTATION_BOTTOM;
     153               0 :   } else if (aNotation.EqualsLiteral("updiagonalstrike")) {
     154               0 :     mNotationsToDraw |= NOTATION_UPDIAGONALSTRIKE;
     155               0 :   } else if (aNotation.EqualsLiteral("downdiagonalstrike")) {
     156               0 :     mNotationsToDraw |= NOTATION_DOWNDIAGONALSTRIKE;
     157               0 :   } else if (aNotation.EqualsLiteral("verticalstrike")) {
     158               0 :     mNotationsToDraw |= NOTATION_VERTICALSTRIKE;
     159               0 :   } else if (aNotation.EqualsLiteral("horizontalstrike")) {
     160               0 :     mNotationsToDraw |= NOTATION_HORIZONTALSTRIKE;
     161               0 :   } else if (aNotation.EqualsLiteral("madruwb")) {
     162               0 :     mNotationsToDraw |= (NOTATION_RIGHT | NOTATION_BOTTOM);
     163                 :   }
     164                 : 
     165               0 :   return NS_OK;
     166                 : }
     167                 : 
     168                 : /*
     169                 :  * Initialize the list of notations to draw
     170                 :  */
     171               0 : void nsMathMLmencloseFrame::InitNotations()
     172                 : {
     173               0 :   mNotationsToDraw = 0;
     174               0 :   mLongDivCharIndex = mRadicalCharIndex = -1;
     175               0 :   mMathMLChar.Clear();
     176                 : 
     177               0 :   nsAutoString value;
     178                 : 
     179               0 :   if (GetAttribute(mContent, mPresentationData.mstyle, nsGkAtoms::notation_,
     180               0 :                    value)) {
     181                 :     // parse the notation attribute
     182               0 :     nsWhitespaceTokenizer tokenizer(value);
     183                 : 
     184               0 :     while (tokenizer.hasMoreTokens())
     185               0 :       AddNotation(tokenizer.nextToken());
     186                 :   } else {
     187                 :     // default: longdiv
     188               0 :     if (NS_FAILED(AllocateMathMLChar(NOTATION_LONGDIV)))
     189                 :       return;
     190               0 :     mNotationsToDraw = NOTATION_LONGDIV;
     191                 :   }
     192                 : }
     193                 : 
     194                 : NS_IMETHODIMP
     195               0 : nsMathMLmencloseFrame::InheritAutomaticData(nsIFrame* aParent)
     196                 : {
     197                 :   // let the base class get the default from our parent
     198               0 :   nsMathMLContainerFrame::InheritAutomaticData(aParent);
     199                 : 
     200               0 :   mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
     201                 : 
     202               0 :   InitNotations();
     203                 : 
     204               0 :   return NS_OK;
     205                 : }
     206                 : 
     207                 : NS_IMETHODIMP
     208               0 : nsMathMLmencloseFrame::TransmitAutomaticData()
     209                 : {
     210               0 :   if (IsToDraw(NOTATION_RADICAL)) {
     211                 :     // The TeXBook (Ch 17. p.141) says that \sqrt is cramped 
     212                 :     UpdatePresentationDataFromChildAt(0, -1,
     213                 :                                       NS_MATHML_COMPRESSED,
     214               0 :                                       NS_MATHML_COMPRESSED);
     215                 :   }
     216                 : 
     217               0 :   return NS_OK;
     218                 : }
     219                 : 
     220                 : NS_IMETHODIMP
     221               0 : nsMathMLmencloseFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
     222                 :                                         const nsRect&           aDirtyRect,
     223                 :                                         const nsDisplayListSet& aLists)
     224                 : {
     225                 :   /////////////
     226                 :   // paint the menclosed content
     227                 :   nsresult rv = nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect,
     228               0 :                                                          aLists);
     229                 : 
     230               0 :   NS_ENSURE_SUCCESS(rv, rv);
     231                 : 
     232               0 :   if (NS_MATHML_HAS_ERROR(mPresentationData.flags))
     233               0 :     return rv;
     234                 : 
     235               0 :   nsRect mencloseRect = nsIFrame::GetRect();
     236               0 :   mencloseRect.x = mencloseRect.y = 0;
     237                 : 
     238               0 :   if (IsToDraw(NOTATION_RADICAL)) {
     239               0 :     rv = mMathMLChar[mRadicalCharIndex].Display(aBuilder, this, aLists);
     240               0 :     NS_ENSURE_SUCCESS(rv, rv);
     241                 : 
     242               0 :     nsRect rect;
     243               0 :     mMathMLChar[mRadicalCharIndex].GetRect(rect);
     244                 :     rect.MoveBy(NS_MATHML_IS_RTL(mPresentationData.flags) ?
     245               0 :                 -mContentWidth : rect.width, 0);
     246               0 :     rect.SizeTo(mContentWidth, mRuleThickness);
     247               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     248               0 :     NS_ENSURE_SUCCESS(rv, rv);
     249                 :   }
     250                 : 
     251               0 :   if (IsToDraw(NOTATION_LONGDIV)) {
     252               0 :     rv = mMathMLChar[mLongDivCharIndex].Display(aBuilder, this, aLists);
     253               0 :     NS_ENSURE_SUCCESS(rv, rv);
     254                 : 
     255               0 :     nsRect rect;
     256               0 :     mMathMLChar[mLongDivCharIndex].GetRect(rect);
     257               0 :     rect.SizeTo(rect.width + mContentWidth, mRuleThickness);
     258               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     259               0 :     NS_ENSURE_SUCCESS(rv, rv);
     260                 :   }
     261                 : 
     262               0 :   if (IsToDraw(NOTATION_TOP)) {
     263               0 :     nsRect rect(0, 0, mencloseRect.width, mRuleThickness);
     264               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     265               0 :     NS_ENSURE_SUCCESS(rv, rv);
     266                 :   }
     267                 : 
     268               0 :   if (IsToDraw(NOTATION_BOTTOM)) {
     269                 :     nsRect rect(0, mencloseRect.height - mRuleThickness,
     270               0 :                 mencloseRect.width, mRuleThickness);
     271               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     272               0 :     NS_ENSURE_SUCCESS(rv, rv);
     273                 :   }
     274                 : 
     275               0 :   if (IsToDraw(NOTATION_LEFT)) {
     276               0 :     nsRect rect(0, 0, mRuleThickness, mencloseRect.height);
     277               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     278               0 :     NS_ENSURE_SUCCESS(rv, rv);
     279                 :   }
     280                 : 
     281               0 :   if (IsToDraw(NOTATION_RIGHT)) {
     282                 :     nsRect rect(mencloseRect.width - mRuleThickness, 0,
     283               0 :                 mRuleThickness, mencloseRect.height);
     284               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     285               0 :     NS_ENSURE_SUCCESS(rv, rv);
     286                 :   }
     287                 : 
     288               0 :   if (IsToDraw(NOTATION_ROUNDEDBOX)) {
     289                 :     rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
     290               0 :                          mRuleThickness, NOTATION_ROUNDEDBOX);
     291               0 :     NS_ENSURE_SUCCESS(rv, rv);
     292                 :   }
     293                 : 
     294               0 :   if (IsToDraw(NOTATION_CIRCLE)) {
     295                 :     rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
     296               0 :                          mRuleThickness, NOTATION_CIRCLE);
     297               0 :     NS_ENSURE_SUCCESS(rv, rv);
     298                 :   }
     299                 : 
     300               0 :   if (IsToDraw(NOTATION_UPDIAGONALSTRIKE)) {
     301                 :     rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
     302               0 :                          mRuleThickness, NOTATION_UPDIAGONALSTRIKE);
     303               0 :     NS_ENSURE_SUCCESS(rv, rv);
     304                 :   }
     305                 : 
     306               0 :   if (IsToDraw(NOTATION_DOWNDIAGONALSTRIKE)) {
     307                 :     rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
     308               0 :                          mRuleThickness, NOTATION_DOWNDIAGONALSTRIKE);
     309               0 :     NS_ENSURE_SUCCESS(rv, rv);
     310                 :   }
     311                 : 
     312               0 :   if (IsToDraw(NOTATION_HORIZONTALSTRIKE)) {
     313                 :     nsRect rect(0, mencloseRect.height / 2 - mRuleThickness / 2,
     314               0 :                 mencloseRect.width, mRuleThickness);
     315               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     316               0 :     NS_ENSURE_SUCCESS(rv, rv);
     317                 :   }
     318                 : 
     319               0 :   if (IsToDraw(NOTATION_VERTICALSTRIKE)) {
     320                 :     nsRect rect(mencloseRect.width / 2 - mRuleThickness / 2, 0,
     321               0 :                 mRuleThickness, mencloseRect.height);
     322               0 :     rv = DisplayBar(aBuilder, this, rect, aLists);
     323               0 :     NS_ENSURE_SUCCESS(rv, rv);
     324                 :   }
     325               0 :   return rv;
     326                 : }
     327                 : 
     328                 : /* virtual */ nsresult
     329               0 : nsMathMLmencloseFrame::MeasureForWidth(nsRenderingContext& aRenderingContext,
     330                 :                                        nsHTMLReflowMetrics& aDesiredSize)
     331                 : {
     332               0 :   return PlaceInternal(aRenderingContext, false, aDesiredSize, true);
     333                 : }
     334                 : 
     335                 : /* virtual */ nsresult
     336               0 : nsMathMLmencloseFrame::Place(nsRenderingContext& aRenderingContext,
     337                 :                              bool                 aPlaceOrigin,
     338                 :                              nsHTMLReflowMetrics& aDesiredSize)
     339                 : {
     340               0 :   return PlaceInternal(aRenderingContext, aPlaceOrigin, aDesiredSize, false);
     341                 : }
     342                 : 
     343                 : /* virtual */ nsresult
     344               0 : nsMathMLmencloseFrame::PlaceInternal(nsRenderingContext& aRenderingContext,
     345                 :                                      bool                 aPlaceOrigin,
     346                 :                                      nsHTMLReflowMetrics& aDesiredSize,
     347                 :                                      bool                 aWidthOnly)
     348                 : {
     349                 :   ///////////////
     350                 :   // Measure the size of our content using the base class to format like an
     351                 :   // inferred mrow.
     352               0 :   nsHTMLReflowMetrics baseSize;
     353                 :   nsresult rv =
     354               0 :     nsMathMLContainerFrame::Place(aRenderingContext, false, baseSize);
     355                 : 
     356               0 :   if (NS_MATHML_HAS_ERROR(mPresentationData.flags) || NS_FAILED(rv)) {
     357               0 :       DidReflowChildren(GetFirstPrincipalChild());
     358               0 :       return rv;
     359                 :     }
     360                 : 
     361               0 :   nsBoundingMetrics bmBase = baseSize.mBoundingMetrics;
     362               0 :   nscoord dx_left = 0, dx_right = 0;
     363               0 :   nsBoundingMetrics bmLongdivChar, bmRadicalChar;
     364               0 :   nscoord radicalAscent = 0, radicalDescent = 0;
     365               0 :   nscoord longdivAscent = 0, longdivDescent = 0;
     366               0 :   nscoord psi = 0;
     367                 : 
     368                 :   ///////////////
     369                 :   // Thickness of bars and font metrics
     370               0 :   nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
     371                 : 
     372                 :   nscoord mEmHeight;
     373               0 :   nsRefPtr<nsFontMetrics> fm;
     374               0 :   nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
     375               0 :   aRenderingContext.SetFont(fm);
     376               0 :   GetRuleThickness(aRenderingContext, fm, mRuleThickness);
     377               0 :   GetEmHeight(fm, mEmHeight);
     378                 : 
     379               0 :   PRUnichar one = '1';
     380               0 :   nsBoundingMetrics bmOne = aRenderingContext.GetBoundingMetrics(&one, 1);
     381                 : 
     382                 :   ///////////////
     383                 :   // General rules: the menclose element takes the size of the enclosed content.
     384                 :   // We add a padding when needed.
     385                 : 
     386                 :   // determine padding & psi
     387               0 :   nscoord padding = 3 * mRuleThickness;
     388               0 :   nscoord delta = padding % onePixel;
     389               0 :   if (delta)
     390               0 :     padding += onePixel - delta; // round up
     391                 : 
     392               0 :   if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
     393                 :       nscoord phi;
     394                 :       // Rule 11, App. G, TeXbook
     395                 :       // psi = clearance between rule and content
     396               0 :       if (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags))
     397               0 :         phi = fm->XHeight();
     398                 :       else
     399               0 :         phi = mRuleThickness;
     400               0 :       psi = mRuleThickness + phi / 4;
     401                 : 
     402               0 :       delta = psi % onePixel;
     403               0 :       if (delta)
     404               0 :         psi += onePixel - delta; // round up
     405                 :     }
     406                 : 
     407               0 :   if (mRuleThickness < onePixel)
     408               0 :     mRuleThickness = onePixel;
     409                 :  
     410                 :   // Set horizontal parameters
     411               0 :   if (IsToDraw(NOTATION_ROUNDEDBOX) ||
     412               0 :       IsToDraw(NOTATION_TOP) ||
     413               0 :       IsToDraw(NOTATION_LEFT) ||
     414               0 :       IsToDraw(NOTATION_BOTTOM) ||
     415               0 :       IsToDraw(NOTATION_CIRCLE))
     416               0 :     dx_left = padding;
     417                 : 
     418               0 :   if (IsToDraw(NOTATION_ROUNDEDBOX) ||
     419               0 :       IsToDraw(NOTATION_TOP) ||
     420               0 :       IsToDraw(NOTATION_RIGHT) ||
     421               0 :       IsToDraw(NOTATION_BOTTOM) ||
     422               0 :       IsToDraw(NOTATION_CIRCLE))
     423               0 :     dx_right = padding;
     424                 : 
     425                 :   // Set vertical parameters
     426               0 :   if (IsToDraw(NOTATION_RIGHT) ||
     427               0 :       IsToDraw(NOTATION_LEFT) ||
     428               0 :       IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
     429               0 :       IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
     430               0 :       IsToDraw(NOTATION_VERTICALSTRIKE) ||
     431               0 :       IsToDraw(NOTATION_CIRCLE) ||
     432               0 :       IsToDraw(NOTATION_ROUNDEDBOX) ||
     433               0 :       IsToDraw(NOTATION_RADICAL) ||
     434               0 :       IsToDraw(NOTATION_LONGDIV)) {
     435                 :       // set a minimal value for the base height
     436               0 :       bmBase.ascent = NS_MAX(bmOne.ascent, bmBase.ascent);
     437               0 :       bmBase.descent = NS_MAX(0, bmBase.descent);
     438                 :   }
     439                 : 
     440               0 :   mBoundingMetrics.ascent = bmBase.ascent;
     441               0 :   mBoundingMetrics.descent = bmBase.descent;
     442                 :     
     443               0 :   if (IsToDraw(NOTATION_ROUNDEDBOX) ||
     444               0 :       IsToDraw(NOTATION_TOP) ||
     445               0 :       IsToDraw(NOTATION_LEFT) ||
     446               0 :       IsToDraw(NOTATION_RIGHT) ||
     447               0 :       IsToDraw(NOTATION_CIRCLE))
     448               0 :     mBoundingMetrics.ascent += padding;
     449                 :   
     450               0 :   if (IsToDraw(NOTATION_ROUNDEDBOX) ||
     451               0 :       IsToDraw(NOTATION_LEFT) ||
     452               0 :       IsToDraw(NOTATION_RIGHT) ||
     453               0 :       IsToDraw(NOTATION_BOTTOM) ||
     454               0 :       IsToDraw(NOTATION_CIRCLE))
     455               0 :     mBoundingMetrics.descent += padding;
     456                 : 
     457                 :   ///////////////
     458                 :   // circle notation: we don't want the ellipse to overlap the enclosed
     459                 :   // content. Hence, we need to increase the size of the bounding box by a
     460                 :   // factor of at least sqrt(2).
     461               0 :   if (IsToDraw(NOTATION_CIRCLE)) {
     462               0 :     double ratio = (sqrt(2.0) - 1.0) / 2.0;
     463                 :     nscoord padding2;
     464                 : 
     465                 :     // Update horizontal parameters
     466               0 :     padding2 = ratio * bmBase.width;
     467                 : 
     468               0 :     dx_left = NS_MAX(dx_left, padding2);
     469               0 :     dx_right = NS_MAX(dx_right, padding2);
     470                 : 
     471                 :     // Update vertical parameters
     472               0 :     padding2 = ratio * (bmBase.ascent + bmBase.descent);
     473                 : 
     474                 :     mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
     475               0 :                                      bmBase.ascent + padding2);
     476                 :     mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
     477               0 :                                       bmBase.descent + padding2);
     478                 :   }
     479                 : 
     480                 :   ///////////////
     481                 :   // longdiv notation:
     482               0 :   if (IsToDraw(NOTATION_LONGDIV)) {
     483               0 :     if (aWidthOnly) {
     484               0 :         nscoord longdiv_width = mMathMLChar[mLongDivCharIndex].
     485               0 :           GetMaxWidth(PresContext(), aRenderingContext);
     486                 : 
     487                 :         // Update horizontal parameters
     488               0 :         dx_left = NS_MAX(dx_left, longdiv_width);
     489                 :     } else {
     490                 :       // Stretch the parenthesis to the appropriate height if it is not
     491                 :       // big enough.
     492               0 :       nsBoundingMetrics contSize = bmBase;
     493               0 :       contSize.ascent = mRuleThickness;
     494               0 :       contSize.descent = bmBase.ascent + bmBase.descent + psi;
     495                 : 
     496                 :       // height(longdiv) should be >= height(base) + psi + mRuleThickness
     497               0 :       mMathMLChar[mLongDivCharIndex].Stretch(PresContext(), aRenderingContext,
     498                 :                                              NS_STRETCH_DIRECTION_VERTICAL,
     499                 :                                              contSize, bmLongdivChar,
     500               0 :                                              NS_STRETCH_LARGER, false);
     501               0 :       mMathMLChar[mLongDivCharIndex].GetBoundingMetrics(bmLongdivChar);
     502                 : 
     503                 :       // Update horizontal parameters
     504               0 :       dx_left = NS_MAX(dx_left, bmLongdivChar.width);
     505                 : 
     506                 :       // Update vertical parameters
     507               0 :       longdivAscent = bmBase.ascent + psi + mRuleThickness;
     508                 :       longdivDescent = NS_MAX(bmBase.descent,
     509                 :                               (bmLongdivChar.ascent + bmLongdivChar.descent -
     510               0 :                                longdivAscent));
     511                 : 
     512                 :       mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
     513               0 :                                        longdivAscent);
     514                 :       mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
     515               0 :                                         longdivDescent);
     516                 :     }
     517                 :   }
     518                 : 
     519                 :   ///////////////
     520                 :   // radical notation:
     521               0 :   if (IsToDraw(NOTATION_RADICAL)) {
     522                 :     nscoord *dx_leading =
     523               0 :       NS_MATHML_IS_RTL(mPresentationData.flags) ? &dx_right : &dx_left;
     524                 :     
     525               0 :     if (aWidthOnly) {
     526               0 :       nscoord radical_width = mMathMLChar[mRadicalCharIndex].
     527               0 :         GetMaxWidth(PresContext(), aRenderingContext);
     528                 :       
     529                 :       // Update horizontal parameters
     530               0 :       *dx_leading = NS_MAX(*dx_leading, radical_width);
     531                 :     } else {
     532                 :       // Stretch the radical symbol to the appropriate height if it is not
     533                 :       // big enough.
     534               0 :       nsBoundingMetrics contSize = bmBase;
     535               0 :       contSize.ascent = mRuleThickness;
     536               0 :       contSize.descent = bmBase.ascent + bmBase.descent + psi;
     537                 : 
     538                 :       // height(radical) should be >= height(base) + psi + mRuleThickness
     539               0 :       mMathMLChar[mRadicalCharIndex].Stretch(PresContext(), aRenderingContext,
     540                 :                                              NS_STRETCH_DIRECTION_VERTICAL,
     541                 :                                              contSize, bmRadicalChar,
     542                 :                                              NS_STRETCH_LARGER,
     543               0 :                                              NS_MATHML_IS_RTL(mPresentationData.flags));
     544               0 :       mMathMLChar[mRadicalCharIndex].GetBoundingMetrics(bmRadicalChar);
     545                 : 
     546                 :       // Update horizontal parameters
     547               0 :       *dx_leading = NS_MAX(*dx_leading, bmRadicalChar.width);
     548                 : 
     549                 :       // Update vertical parameters
     550               0 :       radicalAscent = bmBase.ascent + psi + mRuleThickness;
     551                 :       radicalDescent = NS_MAX(bmBase.descent,
     552                 :                               (bmRadicalChar.ascent + bmRadicalChar.descent -
     553               0 :                                radicalAscent));
     554                 : 
     555                 :       mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
     556               0 :                                        radicalAscent);
     557                 :       mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
     558               0 :                                         radicalDescent);
     559                 :     }
     560                 :   }
     561                 : 
     562                 :   ///////////////
     563                 :   //
     564               0 :   if (IsToDraw(NOTATION_CIRCLE) ||
     565               0 :       IsToDraw(NOTATION_ROUNDEDBOX) ||
     566               0 :       (IsToDraw(NOTATION_LEFT) && IsToDraw(NOTATION_RIGHT))) {
     567                 :     // center the menclose around the content (horizontally)
     568               0 :     dx_left = dx_right = NS_MAX(dx_left, dx_right);
     569                 :   }
     570                 : 
     571                 :   ///////////////
     572                 :   // The maximum size is now computed: set the remaining parameters
     573               0 :   mBoundingMetrics.width = dx_left + bmBase.width + dx_right;
     574                 : 
     575               0 :   mBoundingMetrics.leftBearing = NS_MIN(0, dx_left + bmBase.leftBearing);
     576                 :   mBoundingMetrics.rightBearing =
     577               0 :     NS_MAX(mBoundingMetrics.width, dx_left + bmBase.rightBearing);
     578                 :   
     579               0 :   aDesiredSize.width = mBoundingMetrics.width;
     580                 : 
     581               0 :   aDesiredSize.ascent = NS_MAX(mBoundingMetrics.ascent, baseSize.ascent);
     582                 :   aDesiredSize.height = aDesiredSize.ascent +
     583               0 :     NS_MAX(mBoundingMetrics.descent, baseSize.height - baseSize.ascent);
     584                 : 
     585               0 :   if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
     586                 :     // get the leading to be left at the top of the resulting frame
     587                 :     // this seems more reliable than using fm->GetLeading() on suspicious
     588                 :     // fonts
     589               0 :     nscoord leading = nscoord(0.2f * mEmHeight);
     590               0 :     nscoord desiredSizeAscent = aDesiredSize.ascent;
     591               0 :     nscoord desiredSizeDescent = aDesiredSize.height - aDesiredSize.ascent;
     592                 :     
     593               0 :     if (IsToDraw(NOTATION_LONGDIV)) {
     594                 :       desiredSizeAscent = NS_MAX(desiredSizeAscent,
     595               0 :                                  longdivAscent + leading);
     596                 :       desiredSizeDescent = NS_MAX(desiredSizeDescent,
     597               0 :                                   longdivDescent + mRuleThickness);
     598                 :     }
     599                 :     
     600               0 :     if (IsToDraw(NOTATION_RADICAL)) {
     601                 :       desiredSizeAscent = NS_MAX(desiredSizeAscent,
     602               0 :                                  radicalAscent + leading);
     603                 :       desiredSizeDescent = NS_MAX(desiredSizeDescent,
     604               0 :                                   radicalDescent + mRuleThickness);
     605                 :     }
     606                 : 
     607               0 :     aDesiredSize.ascent = desiredSizeAscent;
     608               0 :     aDesiredSize.height = desiredSizeAscent + desiredSizeDescent;
     609                 :   }
     610                 :     
     611               0 :   if (IsToDraw(NOTATION_CIRCLE) ||
     612               0 :       IsToDraw(NOTATION_ROUNDEDBOX) ||
     613               0 :       (IsToDraw(NOTATION_TOP) && IsToDraw(NOTATION_BOTTOM))) {
     614                 :     // center the menclose around the content (vertically)
     615                 :     nscoord dy = NS_MAX(aDesiredSize.ascent - bmBase.ascent,
     616                 :                         aDesiredSize.height - aDesiredSize.ascent -
     617               0 :                         bmBase.descent);
     618                 : 
     619               0 :     aDesiredSize.ascent = bmBase.ascent + dy;
     620               0 :     aDesiredSize.height = aDesiredSize.ascent + bmBase.descent + dy;
     621                 :   }
     622                 : 
     623                 :   // Update mBoundingMetrics ascent/descent
     624               0 :   if (IsToDraw(NOTATION_TOP) ||
     625               0 :       IsToDraw(NOTATION_RIGHT) ||
     626               0 :       IsToDraw(NOTATION_LEFT) ||
     627               0 :       IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
     628               0 :       IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
     629               0 :       IsToDraw(NOTATION_VERTICALSTRIKE) ||
     630               0 :       IsToDraw(NOTATION_CIRCLE) ||
     631               0 :       IsToDraw(NOTATION_ROUNDEDBOX))
     632               0 :     mBoundingMetrics.ascent = aDesiredSize.ascent;
     633                 :   
     634               0 :   if (IsToDraw(NOTATION_BOTTOM) ||
     635               0 :       IsToDraw(NOTATION_RIGHT) ||
     636               0 :       IsToDraw(NOTATION_LEFT) ||
     637               0 :       IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
     638               0 :       IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
     639               0 :       IsToDraw(NOTATION_VERTICALSTRIKE) ||
     640               0 :       IsToDraw(NOTATION_CIRCLE) ||
     641               0 :       IsToDraw(NOTATION_ROUNDEDBOX))
     642               0 :     mBoundingMetrics.descent = aDesiredSize.height - aDesiredSize.ascent;
     643                 : 
     644               0 :   aDesiredSize.mBoundingMetrics = mBoundingMetrics;
     645                 :   
     646               0 :   mReference.x = 0;
     647               0 :   mReference.y = aDesiredSize.ascent;
     648                 : 
     649               0 :   if (aPlaceOrigin) {
     650                 :     //////////////////
     651                 :     // Set position and size of MathMLChars
     652               0 :     if (IsToDraw(NOTATION_LONGDIV))
     653               0 :       mMathMLChar[mLongDivCharIndex].SetRect(nsRect(dx_left -
     654                 :                                                     bmLongdivChar.width,
     655                 :                                                     aDesiredSize.ascent -
     656                 :                                                     longdivAscent,
     657                 :                                                     bmLongdivChar.width,
     658                 :                                                     bmLongdivChar.ascent +
     659               0 :                                                     bmLongdivChar.descent));
     660                 : 
     661               0 :     if (IsToDraw(NOTATION_RADICAL)) {
     662                 :       nscoord dx = NS_MATHML_IS_RTL(mPresentationData.flags) ?
     663               0 :         dx_left + bmBase.width : dx_left - bmRadicalChar.width;
     664                 : 
     665               0 :       mMathMLChar[mRadicalCharIndex].SetRect(nsRect(dx,
     666                 :                                                     aDesiredSize.ascent -
     667                 :                                                     radicalAscent,
     668                 :                                                     bmRadicalChar.width,
     669                 :                                                     bmRadicalChar.ascent +
     670               0 :                                                     bmRadicalChar.descent));
     671                 :     }
     672                 : 
     673               0 :     mContentWidth = bmBase.width;
     674                 : 
     675                 :     //////////////////
     676                 :     // Finish reflowing child frames
     677               0 :     PositionRowChildFrames(dx_left, aDesiredSize.ascent);
     678                 :   }
     679                 : 
     680               0 :   return NS_OK;
     681                 : }
     682                 : 
     683                 : nscoord
     684               0 : nsMathMLmencloseFrame::FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize)
     685                 : {
     686               0 :   nscoord gap = nsMathMLContainerFrame::FixInterFrameSpacing(aDesiredSize);
     687               0 :   if (!gap)
     688               0 :     return 0;
     689                 : 
     690                 :   // Move the MathML characters
     691               0 :   nsRect rect;
     692               0 :   for (PRUint32 i = 0; i < mMathMLChar.Length(); i++) {
     693               0 :     mMathMLChar[i].GetRect(rect);
     694               0 :     rect.MoveBy(gap, 0);
     695               0 :     mMathMLChar[i].SetRect(rect);
     696                 :   }
     697                 : 
     698               0 :   return gap;
     699                 : }
     700                 : 
     701                 : NS_IMETHODIMP
     702               0 : nsMathMLmencloseFrame::AttributeChanged(PRInt32         aNameSpaceID,
     703                 :                                         nsIAtom*        aAttribute,
     704                 :                                         PRInt32         aModType)
     705                 : {
     706               0 :   if (aAttribute == nsGkAtoms::notation_) {
     707               0 :     InitNotations();
     708                 :   }
     709                 : 
     710                 :   return nsMathMLContainerFrame::
     711               0 :     AttributeChanged(aNameSpaceID, aAttribute, aModType);
     712                 : }
     713                 : 
     714                 : //////////////////
     715                 : // the Style System will use these to pass the proper style context to our
     716                 : // MathMLChar
     717                 : nsStyleContext*
     718               0 : nsMathMLmencloseFrame::GetAdditionalStyleContext(PRInt32 aIndex) const
     719                 : {
     720               0 :   PRInt32 len = mMathMLChar.Length();
     721               0 :   if (aIndex >= 0 && aIndex < len)
     722               0 :     return mMathMLChar[aIndex].GetStyleContext();
     723                 :   else
     724               0 :     return nsnull;
     725                 : }
     726                 : 
     727                 : void
     728               0 : nsMathMLmencloseFrame::SetAdditionalStyleContext(PRInt32          aIndex, 
     729                 :                                                  nsStyleContext*  aStyleContext)
     730                 : {
     731               0 :   PRInt32 len = mMathMLChar.Length();
     732               0 :   if (aIndex >= 0 && aIndex < len)
     733               0 :     mMathMLChar[aIndex].SetStyleContext(aStyleContext);
     734               0 : }
     735                 : 
     736                 : class nsDisplayNotation : public nsDisplayItem
     737                 : {
     738                 : public:
     739               0 :   nsDisplayNotation(nsDisplayListBuilder* aBuilder,
     740                 :                     nsIFrame* aFrame, const nsRect& aRect,
     741                 :                     nscoord aThickness, nsMencloseNotation aType)
     742                 :     : nsDisplayItem(aBuilder, aFrame), mRect(aRect), 
     743               0 :       mThickness(aThickness), mType(aType) {
     744               0 :     MOZ_COUNT_CTOR(nsDisplayNotation);
     745               0 :   }
     746                 : #ifdef NS_BUILD_REFCNT_LOGGING
     747               0 :   virtual ~nsDisplayNotation() {
     748               0 :     MOZ_COUNT_DTOR(nsDisplayNotation);
     749               0 :   }
     750                 : #endif
     751                 : 
     752                 :   virtual void Paint(nsDisplayListBuilder* aBuilder,
     753                 :                      nsRenderingContext* aCtx);
     754               0 :   NS_DISPLAY_DECL_NAME("MathMLMencloseNotation", TYPE_MATHML_MENCLOSE_NOTATION)
     755                 : 
     756                 : private:
     757                 :   nsRect             mRect;
     758                 :   nscoord            mThickness;
     759                 :   nsMencloseNotation mType;
     760                 : };
     761                 : 
     762               0 : void nsDisplayNotation::Paint(nsDisplayListBuilder* aBuilder,
     763                 :                               nsRenderingContext* aCtx)
     764                 : {
     765                 :   // get the gfxRect
     766               0 :   nsPresContext* presContext = mFrame->PresContext();
     767               0 :   gfxRect rect = presContext->AppUnitsToGfxUnits(mRect + ToReferenceFrame());
     768                 : 
     769                 :   // paint the frame with the current text color
     770               0 :   aCtx->SetColor(mFrame->GetVisitedDependentColor(eCSSProperty_color));
     771                 : 
     772                 :   // change line width to mThickness
     773               0 :   gfxContext *gfxCtx = aCtx->ThebesContext();
     774               0 :   gfxFloat currentLineWidth = gfxCtx->CurrentLineWidth();
     775               0 :   gfxFloat e = presContext->AppUnitsToGfxUnits(mThickness);
     776               0 :   gfxCtx->SetLineWidth(e);
     777                 : 
     778               0 :   rect.Deflate(e / 2.0);
     779                 : 
     780               0 :   gfxCtx->NewPath();
     781                 : 
     782               0 :   switch(mType)
     783                 :     {
     784                 :     case NOTATION_CIRCLE:
     785               0 :       gfxCtx->Ellipse(rect.Center(), rect.Size());
     786               0 :       break;
     787                 : 
     788                 :     case NOTATION_ROUNDEDBOX:
     789               0 :       gfxCtx->RoundedRectangle(rect, gfxCornerSizes(3 * e), true);
     790               0 :       break;
     791                 : 
     792                 :     case NOTATION_UPDIAGONALSTRIKE:
     793               0 :       gfxCtx->Line(rect.BottomLeft(), rect.TopRight());
     794               0 :       break;
     795                 : 
     796                 :     case NOTATION_DOWNDIAGONALSTRIKE:
     797               0 :       gfxCtx->Line(rect.TopLeft(), rect.BottomRight());
     798               0 :       break;
     799                 : 
     800                 :     default:
     801               0 :       NS_NOTREACHED("This notation can not be drawn using nsDisplayNotation");
     802               0 :       break;
     803                 :     }
     804                 : 
     805               0 :   gfxCtx->Stroke();
     806                 : 
     807                 :   // restore previous line width
     808               0 :   gfxCtx->SetLineWidth(currentLineWidth);
     809               0 : }
     810                 : 
     811                 : nsresult
     812               0 : nsMathMLmencloseFrame::DisplayNotation(nsDisplayListBuilder* aBuilder,
     813                 :                                        nsIFrame* aFrame, const nsRect& aRect,
     814                 :                                        const nsDisplayListSet& aLists,
     815                 :                                        nscoord aThickness,
     816                 :                                        nsMencloseNotation aType)
     817                 : {
     818               0 :   if (!aFrame->GetStyleVisibility()->IsVisible() || aRect.IsEmpty() ||
     819                 :       aThickness <= 0)
     820               0 :     return NS_OK;
     821                 : 
     822                 :   return aLists.Content()->AppendNewToTop(new (aBuilder)
     823               0 :       nsDisplayNotation(aBuilder, aFrame, aRect, aThickness, aType));
     824                 : }

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