LCOV - code coverage report
Current view: directory - content/mathml/content/src - nsMathMLElement.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 244 0 0.0 %
Date: 2012-06-02 Functions: 24 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 MathML DOM code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * mozilla.org.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2007
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *    Vlad Sukhoy <vladimir.sukhoy@gmail.com> (original developer)
      24                 :  *    Daniel Kraft <d@domob.eu> (nsMathMLElement patch, attachment 262925)
      25                 :  *    Frederic Wang <fred.wang@free.fr>
      26                 :  *
      27                 :  * Alternatively, the contents of this file may be used under the terms of
      28                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      29                 :  * 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
      33                 :  * use your version of this file under the terms of the MPL, indicate your
      34                 :  * decision by deleting the provisions above and replace them with the notice
      35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      36                 :  * the provisions above, a recipient may use your version of this file under
      37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      38                 :  *
      39                 :  * ***** END LICENSE BLOCK ***** */
      40                 : 
      41                 : #include "mozilla/Util.h"
      42                 : 
      43                 : #include "nsMathMLElement.h"
      44                 : #include "nsDOMClassInfoID.h" // for eDOMClassInfo_MathElement_id.
      45                 : #include "nsGkAtoms.h"
      46                 : #include "nsCRT.h"
      47                 : #include "nsRuleData.h"
      48                 : #include "nsCSSValue.h"
      49                 : #include "nsMappedAttributes.h"
      50                 : #include "nsStyleConsts.h"
      51                 : #include "nsIDocument.h"
      52                 : #include "nsEventStates.h"
      53                 : #include "nsIPresShell.h"
      54                 : #include "nsPresContext.h"
      55                 : #include "mozAutoDocUpdate.h"
      56                 : 
      57                 : using namespace mozilla;
      58                 : 
      59                 : //----------------------------------------------------------------------
      60                 : // nsISupports methods:
      61                 : 
      62               0 : DOMCI_NODE_DATA(MathMLElement, nsMathMLElement)
      63                 : 
      64               0 : NS_INTERFACE_TABLE_HEAD(nsMathMLElement)
      65                 :   NS_NODE_OFFSET_AND_INTERFACE_TABLE_BEGIN(nsMathMLElement)
      66                 :     NS_INTERFACE_TABLE_ENTRY(nsMathMLElement, nsIDOMNode)
      67                 :     NS_INTERFACE_TABLE_ENTRY(nsMathMLElement, nsIDOMElement)
      68                 :     NS_INTERFACE_TABLE_ENTRY(nsMathMLElement, nsILink)
      69                 :     NS_INTERFACE_TABLE_ENTRY(nsMathMLElement, Link)
      70               0 :   NS_OFFSET_AND_INTERFACE_TABLE_END
      71               0 :   NS_ELEMENT_INTERFACE_TABLE_TO_MAP_SEGUE
      72               0 :   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(MathMLElement)
      73               0 : NS_ELEMENT_INTERFACE_MAP_END
      74                 : 
      75               0 : NS_IMPL_ADDREF_INHERITED(nsMathMLElement, nsMathMLElementBase)
      76               0 : NS_IMPL_RELEASE_INHERITED(nsMathMLElement, nsMathMLElementBase)
      77                 : 
      78                 : nsresult
      79               0 : nsMathMLElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
      80                 :                             nsIContent* aBindingParent,
      81                 :                             bool aCompileEventHandlers)
      82                 : {
      83                 :   static const char kMathMLStyleSheetURI[] = "resource://gre-resources/mathml.css";
      84                 : 
      85               0 :   Link::ResetLinkState(false);
      86                 : 
      87                 :   nsresult rv = nsMathMLElementBase::BindToTree(aDocument, aParent,
      88                 :                                                 aBindingParent,
      89               0 :                                                 aCompileEventHandlers);
      90               0 :   NS_ENSURE_SUCCESS(rv, rv);
      91                 : 
      92               0 :   if (aDocument) {
      93               0 :     aDocument->RegisterPendingLinkUpdate(this);
      94                 :     
      95               0 :     if (!aDocument->GetMathMLEnabled()) {
      96                 :       // Enable MathML and setup the style sheet during binding, not element
      97                 :       // construction, because we could move a MathML element from the document
      98                 :       // that created it to another document.
      99               0 :       aDocument->SetMathMLEnabled();
     100               0 :       aDocument->EnsureCatalogStyleSheet(kMathMLStyleSheetURI);
     101                 : 
     102                 :       // Rebuild style data for the presshell, because style system
     103                 :       // optimizations may have taken place assuming MathML was disabled.
     104                 :       // (See nsRuleNode::CheckSpecifiedProperties.)
     105               0 :       nsCOMPtr<nsIPresShell> shell = aDocument->GetShell();
     106               0 :       if (shell) {
     107               0 :         shell->GetPresContext()->PostRebuildAllStyleDataEvent(nsChangeHint(0));
     108                 :       }
     109                 :     }
     110                 :   }
     111                 : 
     112               0 :   return rv;
     113                 : }
     114                 : 
     115                 : void
     116               0 : nsMathMLElement::UnbindFromTree(bool aDeep, bool aNullParent)
     117                 : {
     118                 :   // If this link is ever reinserted into a document, it might
     119                 :   // be under a different xml:base, so forget the cached state now.
     120               0 :   Link::ResetLinkState(false);
     121                 :   
     122               0 :   nsIDocument* doc = GetCurrentDoc();
     123               0 :   if (doc) {
     124               0 :     doc->UnregisterPendingLinkUpdate(this);
     125                 :   }
     126                 : 
     127               0 :   nsMathMLElementBase::UnbindFromTree(aDeep, aNullParent);
     128               0 : }
     129                 : 
     130                 : bool
     131               0 : nsMathMLElement::ParseAttribute(PRInt32 aNamespaceID,
     132                 :                                 nsIAtom* aAttribute,
     133                 :                                 const nsAString& aValue,
     134                 :                                 nsAttrValue& aResult)
     135                 : {
     136               0 :   if (aNamespaceID == kNameSpaceID_None) {
     137               0 :     if (aAttribute == nsGkAtoms::color ||
     138                 :         aAttribute == nsGkAtoms::mathcolor_ ||
     139                 :         aAttribute == nsGkAtoms::background ||
     140                 :         aAttribute == nsGkAtoms::mathbackground_) {
     141               0 :       return aResult.ParseColor(aValue);
     142                 :     }
     143                 :   }
     144                 : 
     145                 :   return nsMathMLElementBase::ParseAttribute(aNamespaceID, aAttribute,
     146               0 :                                              aValue, aResult);
     147                 : }
     148                 : 
     149                 : static nsGenericElement::MappedAttributeEntry sMtableStyles[] = {
     150                 :   { &nsGkAtoms::width },
     151                 :   { nsnull }
     152                 : };
     153                 : 
     154                 : static nsGenericElement::MappedAttributeEntry sTokenStyles[] = {
     155                 :   { &nsGkAtoms::mathsize_ },
     156                 :   { &nsGkAtoms::fontsize_ },
     157                 :   { &nsGkAtoms::color },
     158                 :   { &nsGkAtoms::fontfamily_ },
     159                 :   { nsnull }
     160                 : };
     161                 : 
     162                 : static nsGenericElement::MappedAttributeEntry sEnvironmentStyles[] = {
     163                 :   { &nsGkAtoms::scriptlevel_ },
     164                 :   { &nsGkAtoms::scriptminsize_ },
     165                 :   { &nsGkAtoms::scriptsizemultiplier_ },
     166                 :   { &nsGkAtoms::background },
     167                 :   { nsnull }
     168                 : };
     169                 : 
     170                 : static nsGenericElement::MappedAttributeEntry sCommonPresStyles[] = {
     171                 :   { &nsGkAtoms::mathcolor_ },
     172                 :   { &nsGkAtoms::mathbackground_ },
     173                 :   { nsnull }
     174                 : };
     175                 : 
     176                 : bool
     177               0 : nsMathMLElement::IsAttributeMapped(const nsIAtom* aAttribute) const
     178                 : {
     179                 :   static const MappedAttributeEntry* const mtableMap[] = {
     180                 :     sMtableStyles,
     181                 :     sCommonPresStyles
     182                 :   };
     183                 :   static const MappedAttributeEntry* const tokenMap[] = {
     184                 :     sTokenStyles,
     185                 :     sCommonPresStyles
     186                 :   };
     187                 :   static const MappedAttributeEntry* const mstyleMap[] = {
     188                 :     sTokenStyles,
     189                 :     sEnvironmentStyles,
     190                 :     sCommonPresStyles
     191                 :   };
     192                 :   static const MappedAttributeEntry* const commonPresMap[] = {
     193                 :     sCommonPresStyles
     194                 :   };
     195                 :   
     196                 :   // We don't support mglyph (yet).
     197               0 :   nsIAtom* tag = Tag();
     198               0 :   if (tag == nsGkAtoms::ms_ || tag == nsGkAtoms::mi_ ||
     199                 :       tag == nsGkAtoms::mn_ || tag == nsGkAtoms::mo_ ||
     200                 :       tag == nsGkAtoms::mtext_ || tag == nsGkAtoms::mspace_)
     201               0 :     return FindAttributeDependence(aAttribute, tokenMap);
     202               0 :   if (tag == nsGkAtoms::mstyle_ ||
     203                 :       tag == nsGkAtoms::math)
     204               0 :     return FindAttributeDependence(aAttribute, mstyleMap);
     205                 : 
     206               0 :   if (tag == nsGkAtoms::mtable_)
     207               0 :     return FindAttributeDependence(aAttribute, mtableMap);
     208                 : 
     209               0 :   if (tag == nsGkAtoms::maction_ ||
     210                 :       tag == nsGkAtoms::maligngroup_ ||
     211                 :       tag == nsGkAtoms::malignmark_ ||
     212                 :       tag == nsGkAtoms::menclose_ ||
     213                 :       tag == nsGkAtoms::merror_ ||
     214                 :       tag == nsGkAtoms::mfenced_ ||
     215                 :       tag == nsGkAtoms::mfrac_ ||
     216                 :       tag == nsGkAtoms::mover_ ||
     217                 :       tag == nsGkAtoms::mpadded_ ||
     218                 :       tag == nsGkAtoms::mphantom_ ||
     219                 :       tag == nsGkAtoms::mprescripts_ ||
     220                 :       tag == nsGkAtoms::mroot_ ||
     221                 :       tag == nsGkAtoms::mrow_ ||
     222                 :       tag == nsGkAtoms::msqrt_ ||
     223                 :       tag == nsGkAtoms::msub_ ||
     224                 :       tag == nsGkAtoms::msubsup_ ||
     225                 :       tag == nsGkAtoms::msup_ ||
     226                 :       tag == nsGkAtoms::mtd_ ||
     227                 :       tag == nsGkAtoms::mtr_ ||
     228                 :       tag == nsGkAtoms::munder_ ||
     229                 :       tag == nsGkAtoms::munderover_ ||
     230                 :       tag == nsGkAtoms::none) {
     231               0 :     return FindAttributeDependence(aAttribute, commonPresMap);
     232                 :   }
     233                 : 
     234               0 :   return false;
     235                 : }
     236                 : 
     237                 : nsMapRuleToAttributesFunc
     238               0 : nsMathMLElement::GetAttributeMappingFunction() const
     239                 : {
     240                 :   // It doesn't really matter what our tag is here, because only attributes
     241                 :   // that satisfy IsAttributeMapped will be stored in the mapped attributes
     242                 :   // list and available to the mapping function
     243               0 :   return &MapMathMLAttributesInto;
     244                 : }
     245                 : 
     246                 : // ================
     247                 : // Utilities for parsing and retrieving numeric values
     248                 : 
     249                 : /*
     250                 : The REC says:
     251                 :   An explicit plus sign ('+') is not allowed as part of a numeric value
     252                 :   except when it is specifically listed in the syntax (as a quoted '+'
     253                 :   or "+"),
     254                 : 
     255                 :   Units allowed
     256                 :   ID  Description
     257                 :   em  ems (font-relative unit traditionally used for horizontal lengths)
     258                 :   ex  exs (font-relative unit traditionally used for vertical lengths)
     259                 :   px  pixels, or pixel size of a "typical computer display"
     260                 :   in  inches (1 inch = 2.54 centimeters)
     261                 :   cm  centimeters
     262                 :   mm  millimeters
     263                 :   pt  points (1 point = 1/72 inch)
     264                 :   pc  picas (1 pica = 12 points)
     265                 :   %   percentage of default value
     266                 : 
     267                 : Implementation here:
     268                 :   The numeric value is valid only if it is of the form [-] nnn.nnn
     269                 :   [h/v-unit]
     270                 : */
     271                 : 
     272                 : /* static */ bool
     273               0 : nsMathMLElement::ParseNumericValue(const nsString& aString,
     274                 :                                    nsCSSValue&     aCSSValue,
     275                 :                                    PRUint32        aFlags)
     276                 : {
     277               0 :   nsAutoString str(aString);
     278               0 :   str.CompressWhitespace(); // aString is const in this code...
     279                 : 
     280               0 :   PRInt32 stringLength = str.Length();
     281               0 :   if (!stringLength)
     282               0 :     return false;
     283                 : 
     284               0 :   nsAutoString number, unit;
     285                 : 
     286                 :   // see if the negative sign is there
     287               0 :   PRInt32 i = 0;
     288               0 :   PRUnichar c = str[0];
     289               0 :   if (c == '-') {
     290               0 :     number.Append(c);
     291               0 :     i++;
     292                 : 
     293                 :     // skip any space after the negative sign
     294               0 :     if (i < stringLength && nsCRT::IsAsciiSpace(str[i]))
     295               0 :       i++;
     296                 :   }
     297                 : 
     298                 :   // Gather up characters that make up the number
     299               0 :   bool gotDot = false;
     300               0 :   for ( ; i < stringLength; i++) {
     301               0 :     c = str[i];
     302               0 :     if (gotDot && c == '.')
     303               0 :       return false;  // two dots encountered
     304               0 :     else if (c == '.')
     305               0 :       gotDot = true;
     306               0 :     else if (!nsCRT::IsAsciiDigit(c)) {
     307               0 :       str.Right(unit, stringLength - i);
     308                 :       // some authors leave blanks before the unit, but that shouldn't
     309                 :       // be allowed, so don't CompressWhitespace on 'unit'.
     310               0 :       break;
     311                 :     }
     312               0 :     number.Append(c);
     313                 :   }
     314                 : 
     315                 :   // Convert number to floating point
     316                 :   PRInt32 errorCode;
     317               0 :   float floatValue = number.ToFloat(&errorCode);
     318               0 :   if (NS_FAILED(errorCode))
     319               0 :     return false;
     320               0 :   if (floatValue < 0 && !(aFlags & PARSE_ALLOW_NEGATIVE))
     321               0 :     return false;
     322                 : 
     323                 :   nsCSSUnit cssUnit;
     324               0 :   if (unit.IsEmpty()) {
     325               0 :     if (aFlags & PARSE_ALLOW_UNITLESS) {
     326                 :       // no explicit unit, this is a number that will act as a multiplier
     327               0 :       cssUnit = eCSSUnit_Number;
     328                 :     } else {
     329                 :       // We are supposed to have a unit, but there isn't one.
     330                 :       // If the value is 0 we can just call it "pixels" otherwise
     331                 :       // this is illegal.
     332               0 :       if (floatValue != 0.0)
     333               0 :         return false;
     334               0 :       cssUnit = eCSSUnit_Pixel;
     335                 :     }
     336                 :   }
     337               0 :   else if (unit.EqualsLiteral("%")) {
     338               0 :     aCSSValue.SetPercentValue(floatValue / 100.0f);
     339               0 :     return true;
     340                 :   }
     341               0 :   else if (unit.EqualsLiteral("em")) cssUnit = eCSSUnit_EM;
     342               0 :   else if (unit.EqualsLiteral("ex")) cssUnit = eCSSUnit_XHeight;
     343               0 :   else if (unit.EqualsLiteral("px")) cssUnit = eCSSUnit_Pixel;
     344               0 :   else if (unit.EqualsLiteral("in")) cssUnit = eCSSUnit_Inch;
     345               0 :   else if (unit.EqualsLiteral("cm")) cssUnit = eCSSUnit_Centimeter;
     346               0 :   else if (unit.EqualsLiteral("mm")) cssUnit = eCSSUnit_Millimeter;
     347               0 :   else if (unit.EqualsLiteral("pt")) cssUnit = eCSSUnit_Point;
     348               0 :   else if (unit.EqualsLiteral("pc")) cssUnit = eCSSUnit_Pica;
     349                 :   else // unexpected unit
     350               0 :     return false;
     351                 : 
     352               0 :   aCSSValue.SetFloatValue(floatValue, cssUnit);
     353               0 :   return true;
     354                 : }
     355                 : 
     356                 : void
     357               0 : nsMathMLElement::MapMathMLAttributesInto(const nsMappedAttributes* aAttributes,
     358                 :                                          nsRuleData* aData)
     359                 : {
     360               0 :   if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Font)) {
     361                 :     const nsAttrValue* value =
     362               0 :       aAttributes->GetAttr(nsGkAtoms::scriptsizemultiplier_);
     363                 :     nsCSSValue* scriptSizeMultiplier =
     364               0 :       aData->ValueForScriptSizeMultiplier();
     365               0 :     if (value && value->Type() == nsAttrValue::eString &&
     366               0 :         scriptSizeMultiplier->GetUnit() == eCSSUnit_Null) {
     367               0 :       nsAutoString str(value->GetStringValue());
     368               0 :       str.CompressWhitespace();
     369                 :       // MathML numbers can't have leading '+'
     370               0 :       if (str.Length() > 0 && str.CharAt(0) != '+') {
     371                 :         PRInt32 errorCode;
     372               0 :         float floatValue = str.ToFloat(&errorCode);
     373                 :         // Negative scriptsizemultipliers are not parsed
     374               0 :         if (NS_SUCCEEDED(errorCode) && floatValue >= 0.0f) {
     375               0 :           scriptSizeMultiplier->SetFloatValue(floatValue, eCSSUnit_Number);
     376                 :         }
     377                 :       }
     378                 :     }
     379                 : 
     380               0 :     value = aAttributes->GetAttr(nsGkAtoms::scriptminsize_);
     381               0 :     nsCSSValue* scriptMinSize = aData->ValueForScriptMinSize();
     382               0 :     if (value && value->Type() == nsAttrValue::eString &&
     383               0 :         scriptMinSize->GetUnit() == eCSSUnit_Null) {
     384               0 :       ParseNumericValue(value->GetStringValue(), *scriptMinSize, 0);
     385                 :     }
     386                 : 
     387               0 :     value = aAttributes->GetAttr(nsGkAtoms::scriptlevel_);
     388               0 :     nsCSSValue* scriptLevel = aData->ValueForScriptLevel();
     389               0 :     if (value && value->Type() == nsAttrValue::eString &&
     390               0 :         scriptLevel->GetUnit() == eCSSUnit_Null) {
     391               0 :       nsAutoString str(value->GetStringValue());
     392               0 :       str.CompressWhitespace();
     393               0 :       if (str.Length() > 0) {
     394                 :         PRInt32 errorCode;
     395               0 :         PRInt32 intValue = str.ToInteger(&errorCode);
     396               0 :         if (NS_SUCCEEDED(errorCode)) {
     397                 :           // This is kind of cheesy ... if the scriptlevel has a sign,
     398                 :           // then it's a relative value and we store the nsCSSValue as an
     399                 :           // Integer to indicate that. Otherwise we store it as a Number
     400                 :           // to indicate that the scriptlevel is absolute.
     401               0 :           PRUnichar ch = str.CharAt(0);
     402               0 :           if (ch == '+' || ch == '-') {
     403               0 :             scriptLevel->SetIntValue(intValue, eCSSUnit_Integer);
     404                 :           } else {
     405               0 :             scriptLevel->SetFloatValue(intValue, eCSSUnit_Number);
     406                 :           }
     407                 :         }
     408                 :       }
     409                 :     }
     410                 : 
     411               0 :     bool parseSizeKeywords = true;
     412               0 :     value = aAttributes->GetAttr(nsGkAtoms::mathsize_);
     413               0 :     if (!value) {
     414               0 :       parseSizeKeywords = false;
     415               0 :       value = aAttributes->GetAttr(nsGkAtoms::fontsize_);
     416                 :     }
     417               0 :     nsCSSValue* fontSize = aData->ValueForFontSize();
     418               0 :     if (value && value->Type() == nsAttrValue::eString &&
     419               0 :         fontSize->GetUnit() == eCSSUnit_Null) {
     420               0 :       nsAutoString str(value->GetStringValue());
     421               0 :       if (!ParseNumericValue(str, *fontSize, 0) &&
     422                 :           parseSizeKeywords) {
     423                 :         static const char sizes[3][7] = { "small", "normal", "big" };
     424                 :         static const PRInt32 values[NS_ARRAY_LENGTH(sizes)] = {
     425                 :           NS_STYLE_FONT_SIZE_SMALL, NS_STYLE_FONT_SIZE_MEDIUM,
     426                 :           NS_STYLE_FONT_SIZE_LARGE
     427                 :         };
     428               0 :         str.CompressWhitespace();
     429               0 :         for (PRUint32 i = 0; i < ArrayLength(sizes); ++i) {
     430               0 :           if (str.EqualsASCII(sizes[i])) {
     431               0 :             fontSize->SetIntValue(values[i], eCSSUnit_Enumerated);
     432               0 :             break;
     433                 :           }
     434                 :         }
     435                 :       }
     436                 :     }
     437                 : 
     438               0 :     value = aAttributes->GetAttr(nsGkAtoms::fontfamily_);
     439               0 :     nsCSSValue* fontFamily = aData->ValueForFontFamily();
     440               0 :     if (value && value->Type() == nsAttrValue::eString &&
     441               0 :         fontFamily->GetUnit() == eCSSUnit_Null) {
     442               0 :       fontFamily->SetStringValue(value->GetStringValue(), eCSSUnit_Families);
     443                 :     }
     444                 :   }
     445                 : 
     446               0 :   if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Background)) {
     447                 :     const nsAttrValue* value =
     448               0 :       aAttributes->GetAttr(nsGkAtoms::mathbackground_);
     449               0 :     if (!value) {
     450               0 :       value = aAttributes->GetAttr(nsGkAtoms::background);
     451                 :     }
     452               0 :     nsCSSValue* backgroundColor = aData->ValueForBackgroundColor();
     453               0 :     if (value && backgroundColor->GetUnit() == eCSSUnit_Null) {
     454                 :       nscolor color;
     455               0 :       if (value->GetColorValue(color)) {
     456               0 :         backgroundColor->SetColorValue(color);
     457                 :       }
     458                 :     }
     459                 :   }
     460                 : 
     461               0 :   if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
     462               0 :     const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::mathcolor_);
     463               0 :     if (!value) {
     464               0 :       value = aAttributes->GetAttr(nsGkAtoms::color);
     465                 :     }
     466                 :     nscolor color;
     467               0 :     nsCSSValue* colorValue = aData->ValueForColor();
     468               0 :     if (value && value->GetColorValue(color) &&
     469               0 :         colorValue->GetUnit() == eCSSUnit_Null) {
     470               0 :       colorValue->SetColorValue(color);
     471                 :     }
     472                 :   }
     473                 : 
     474               0 :   if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Position)) {
     475                 :     // width: value
     476               0 :     nsCSSValue* width = aData->ValueForWidth();
     477               0 :     if (width->GetUnit() == eCSSUnit_Null) {
     478               0 :       const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::width);
     479                 :       // This does not handle auto and unitless values
     480               0 :       if (value && value->Type() == nsAttrValue::eString) {
     481               0 :         ParseNumericValue(value->GetStringValue(), *width, 0);
     482                 :       }
     483                 :     }
     484                 :   }
     485                 : 
     486               0 : }
     487                 : 
     488                 : nsresult
     489               0 : nsMathMLElement::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
     490                 : {
     491               0 :   nsresult rv = nsGenericElement::PreHandleEvent(aVisitor);
     492               0 :   NS_ENSURE_SUCCESS(rv, rv);
     493                 : 
     494               0 :   return PreHandleEventForLinks(aVisitor);
     495                 : }
     496                 : 
     497                 : nsresult
     498               0 : nsMathMLElement::PostHandleEvent(nsEventChainPostVisitor& aVisitor)
     499                 : {
     500               0 :   return PostHandleEventForLinks(aVisitor);
     501                 : }
     502                 : 
     503               0 : NS_IMPL_ELEMENT_CLONE(nsMathMLElement)
     504                 : 
     505                 : nsEventStates
     506               0 : nsMathMLElement::IntrinsicState() const
     507                 : {
     508                 :   return Link::LinkState() | nsMathMLElementBase::IntrinsicState() |
     509               0 :     (mIncrementScriptLevel ? NS_EVENT_STATE_INCREMENT_SCRIPT_LEVEL : nsEventStates());
     510                 : }
     511                 : 
     512                 : bool
     513               0 : nsMathMLElement::IsNodeOfType(PRUint32 aFlags) const
     514                 : {
     515               0 :   return !(aFlags & ~eCONTENT);
     516                 : }
     517                 : 
     518                 : void
     519               0 : nsMathMLElement::SetIncrementScriptLevel(bool aIncrementScriptLevel,
     520                 :                                          bool aNotify)
     521                 : {
     522               0 :   if (aIncrementScriptLevel == mIncrementScriptLevel)
     523               0 :     return;
     524               0 :   mIncrementScriptLevel = aIncrementScriptLevel;
     525                 : 
     526               0 :   NS_ASSERTION(aNotify, "We always notify!");
     527                 : 
     528               0 :   UpdateState(true);
     529                 : }
     530                 : 
     531                 : bool
     532               0 : nsMathMLElement::IsFocusable(PRInt32 *aTabIndex, bool aWithMouse)
     533                 : {
     534               0 :   nsCOMPtr<nsIURI> uri;
     535               0 :   if (IsLink(getter_AddRefs(uri))) {
     536               0 :     if (aTabIndex) {
     537               0 :       *aTabIndex = ((sTabFocusModel & eTabFocus_linksMask) == 0 ? -1 : 0);
     538                 :     }
     539               0 :     return true;
     540                 :   }
     541                 : 
     542               0 :   if (aTabIndex) {
     543               0 :     *aTabIndex = -1;
     544                 :   }
     545                 : 
     546               0 :   return false;
     547                 : }
     548                 : 
     549                 : bool
     550               0 : nsMathMLElement::IsLink(nsIURI** aURI) const
     551                 : {
     552                 :   // http://www.w3.org/TR/2010/REC-MathML3-20101021/chapter6.html#interf.link
     553                 :   // The REC says that the following elements should not be linking elements:
     554               0 :   nsIAtom* tag = Tag();
     555               0 :   if (tag == nsGkAtoms::mprescripts_ ||
     556                 :       tag == nsGkAtoms::none         ||
     557                 :       tag == nsGkAtoms::malignmark_  ||
     558                 :       tag == nsGkAtoms::maligngroup_) {
     559               0 :     *aURI = nsnull;
     560               0 :     return false;
     561                 :   }
     562                 : 
     563               0 :   bool hasHref = false;
     564                 :   const nsAttrValue* href = mAttrsAndChildren.GetAttr(nsGkAtoms::href,
     565               0 :                                                       kNameSpaceID_None);
     566               0 :   if (href) {
     567                 :     // MathML href
     568                 :     // The REC says: "When user agents encounter MathML elements with both href
     569                 :     // and xlink:href attributes, the href attribute should take precedence."
     570               0 :     hasHref = true;
     571                 :   } else {
     572                 :     // To be a clickable XLink for styling and interaction purposes, we require:
     573                 :     //
     574                 :     //   xlink:href    - must be set
     575                 :     //   xlink:type    - must be unset or set to "" or set to "simple"
     576                 :     //   xlink:show    - must be unset or set to "", "new" or "replace"
     577                 :     //   xlink:actuate - must be unset or set to "" or "onRequest"
     578                 :     //
     579                 :     // For any other values, we're either not a *clickable* XLink, or the end
     580                 :     // result is poorly specified. Either way, we return false.
     581                 :     
     582                 :     static nsIContent::AttrValuesArray sTypeVals[] =
     583                 :       { &nsGkAtoms::_empty, &nsGkAtoms::simple, nsnull };
     584                 :     
     585                 :     static nsIContent::AttrValuesArray sShowVals[] =
     586                 :       { &nsGkAtoms::_empty, &nsGkAtoms::_new, &nsGkAtoms::replace, nsnull };
     587                 :     
     588                 :     static nsIContent::AttrValuesArray sActuateVals[] =
     589                 :       { &nsGkAtoms::_empty, &nsGkAtoms::onRequest, nsnull };
     590                 :     
     591                 :     // Optimization: check for href first for early return
     592                 :     href = mAttrsAndChildren.GetAttr(nsGkAtoms::href,
     593               0 :                                      kNameSpaceID_XLink);
     594               0 :     if (href &&
     595                 :         FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::type,
     596               0 :                         sTypeVals, eCaseMatters) !=
     597                 :         nsIContent::ATTR_VALUE_NO_MATCH &&
     598                 :         FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
     599               0 :                         sShowVals, eCaseMatters) !=
     600                 :         nsIContent::ATTR_VALUE_NO_MATCH &&
     601                 :         FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::actuate,
     602               0 :                         sActuateVals, eCaseMatters) !=
     603                 :         nsIContent::ATTR_VALUE_NO_MATCH) {
     604               0 :       hasHref = true;
     605                 :     }
     606                 :   }
     607                 : 
     608               0 :   if (hasHref) {
     609               0 :     nsCOMPtr<nsIURI> baseURI = GetBaseURI();
     610                 :     // Get absolute URI
     611               0 :     nsAutoString hrefStr;
     612               0 :     href->ToString(hrefStr); 
     613                 :     nsContentUtils::NewURIWithDocumentCharset(aURI, hrefStr,
     614               0 :                                               OwnerDoc(), baseURI);
     615                 :     // must promise out param is non-null if we return true
     616               0 :     return !!*aURI;
     617                 :   }
     618                 : 
     619               0 :   *aURI = nsnull;
     620               0 :   return false;
     621                 : }
     622                 : 
     623                 : void
     624               0 : nsMathMLElement::GetLinkTarget(nsAString& aTarget)
     625                 : {
     626                 :   const nsAttrValue* target = mAttrsAndChildren.GetAttr(nsGkAtoms::target,
     627               0 :                                                         kNameSpaceID_XLink);
     628               0 :   if (target) {
     629               0 :     target->ToString(aTarget);
     630                 :   }
     631                 : 
     632               0 :   if (aTarget.IsEmpty()) {
     633                 : 
     634                 :     static nsIContent::AttrValuesArray sShowVals[] =
     635                 :       { &nsGkAtoms::_new, &nsGkAtoms::replace, nsnull };
     636                 :     
     637               0 :     switch (FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
     638               0 :                             sShowVals, eCaseMatters)) {
     639                 :     case 0:
     640               0 :       aTarget.AssignLiteral("_blank");
     641               0 :       return;
     642                 :     case 1:
     643               0 :       return;
     644                 :     }
     645               0 :     OwnerDoc()->GetBaseTarget(aTarget);
     646                 :   }
     647                 : }
     648                 : 
     649                 : nsLinkState
     650               0 : nsMathMLElement::GetLinkState() const
     651                 : {
     652               0 :   return Link::GetLinkState();
     653                 : }
     654                 : 
     655                 : already_AddRefed<nsIURI>
     656               0 : nsMathMLElement::GetHrefURI() const
     657                 : {
     658               0 :   nsCOMPtr<nsIURI> hrefURI;
     659               0 :   return IsLink(getter_AddRefs(hrefURI)) ? hrefURI.forget() : nsnull;
     660                 : }
     661                 : 
     662                 : nsresult
     663               0 : nsMathMLElement::SetAttr(PRInt32 aNameSpaceID, nsIAtom* aName,
     664                 :                          nsIAtom* aPrefix, const nsAString& aValue,
     665                 :                          bool aNotify)
     666                 : {
     667                 :   nsresult rv = nsMathMLElementBase::SetAttr(aNameSpaceID, aName, aPrefix,
     668               0 :                                            aValue, aNotify);
     669                 : 
     670                 :   // The ordering of the parent class's SetAttr call and Link::ResetLinkState
     671                 :   // is important here!  The attribute is not set until SetAttr returns, and
     672                 :   // we will need the updated attribute value because notifying the document
     673                 :   // that content states have changed will call IntrinsicState, which will try
     674                 :   // to get updated information about the visitedness from Link.
     675               0 :   if (aName == nsGkAtoms::href &&
     676                 :       (aNameSpaceID == kNameSpaceID_None ||
     677                 :        aNameSpaceID == kNameSpaceID_XLink)) {
     678               0 :     Link::ResetLinkState(!!aNotify);
     679                 :   }
     680                 : 
     681               0 :   return rv;
     682                 : }
     683                 : 
     684                 : nsresult
     685               0 : nsMathMLElement::UnsetAttr(PRInt32 aNameSpaceID, nsIAtom* aAttr,
     686                 :                            bool aNotify)
     687                 : {
     688               0 :   nsresult rv = nsMathMLElementBase::UnsetAttr(aNameSpaceID, aAttr, aNotify);
     689                 : 
     690                 :   // The ordering of the parent class's UnsetAttr call and Link::ResetLinkState
     691                 :   // is important here!  The attribute is not unset until UnsetAttr returns, and
     692                 :   // we will need the updated attribute value because notifying the document
     693                 :   // that content states have changed will call IntrinsicState, which will try
     694                 :   // to get updated information about the visitedness from Link.
     695               0 :   if (aAttr == nsGkAtoms::href &&
     696                 :       (aNameSpaceID == kNameSpaceID_None ||
     697                 :        aNameSpaceID == kNameSpaceID_XLink)) {
     698               0 :     Link::ResetLinkState(!!aNotify);
     699                 :   }
     700                 : 
     701               0 :   return rv;
     702                 : }

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