LCOV - app.info - content/mathml/content/src/nsMathMLElement.cpp

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: | 2012-07-07 | 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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