/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "mozilla/dom/MathMLElement.h" #include "base/compiler_specific.h" #include "mozilla/dom/BindContext.h" #include "mozilla/ArrayUtils.h" #include "mozilla/EventListenerManager.h" #include "mozilla/FontPropertyTypes.h" #include "mozilla/StaticPrefs_mathml.h" #include "mozilla/TextUtils.h" #include "nsGkAtoms.h" #include "nsIContentInlines.h" #include "nsITableCellLayout.h" // for MAX_COLSPAN / MAX_ROWSPAN #include "nsCSSValue.h" #include "nsStyleConsts.h" #include "mozilla/dom/Document.h" #include "nsPresContext.h" #include "mozAutoDocUpdate.h" #include "nsIScriptError.h" #include "nsContentUtils.h" #include "nsIURI.h" #include "mozilla/EventDispatcher.h" #include "mozilla/MappedDeclarationsBuilder.h" #include "mozilla/dom/MathMLElementBinding.h" using namespace mozilla; using namespace mozilla::dom; //---------------------------------------------------------------------- // nsISupports methods: NS_IMPL_ISUPPORTS_INHERITED(MathMLElement, MathMLElementBase, Link) static nsresult ReportLengthParseError(const nsString& aValue, Document* aDocument) { AutoTArray arg = {aValue}; return nsContentUtils::ReportToConsole( nsIScriptError::errorFlag, "MathML"_ns, aDocument, nsContentUtils::eMATHML_PROPERTIES, "LengthParsingError", arg); } static nsresult ReportParseErrorNoTag(const nsString& aValue, nsAtom* aAtom, Document& aDocument) { AutoTArray argv = {aValue, nsDependentAtomString(aAtom)}; return nsContentUtils::ReportToConsole( nsIScriptError::errorFlag, "MathML"_ns, &aDocument, nsContentUtils::eMATHML_PROPERTIES, "AttributeParsingErrorNoTag", argv); } MathMLElement::MathMLElement( already_AddRefed& aNodeInfo) : MathMLElementBase(std::move(aNodeInfo)), ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)) {} MathMLElement::MathMLElement( already_AddRefed&& aNodeInfo) : MathMLElementBase(std::move(aNodeInfo)), ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)) {} nsresult MathMLElement::BindToTree(BindContext& aContext, nsINode& aParent) { nsresult rv = MathMLElementBase::BindToTree(aContext, aParent); NS_ENSURE_SUCCESS(rv, rv); Link::BindToTree(aContext); // Set the bit in the document for telemetry. if (Document* doc = aContext.GetComposedDoc()) { doc->SetMathMLEnabled(); } return rv; } void MathMLElement::UnbindFromTree(bool aNullParent) { MathMLElementBase::UnbindFromTree(aNullParent); // Without removing the link state we risk a dangling pointer in the // mStyledLinks hashtable Link::UnbindFromTree(); } bool MathMLElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute, const nsAString& aValue, nsIPrincipal* aMaybeScriptedPrincipal, nsAttrValue& aResult) { MOZ_ASSERT(IsMathMLElement()); if (aNamespaceID == kNameSpaceID_None) { if (aAttribute == nsGkAtoms::color || aAttribute == nsGkAtoms::mathcolor_ || aAttribute == nsGkAtoms::background || aAttribute == nsGkAtoms::mathbackground_) { return aResult.ParseColor(aValue); } if (aAttribute == nsGkAtoms::tabindex) { return aResult.ParseIntValue(aValue); } if (mNodeInfo->Equals(nsGkAtoms::mtd_)) { if (aAttribute == nsGkAtoms::columnspan_) { aResult.ParseClampedNonNegativeInt(aValue, 1, 1, MAX_COLSPAN); return true; } if (aAttribute == nsGkAtoms::rowspan) { aResult.ParseClampedNonNegativeInt(aValue, 1, 0, MAX_ROWSPAN); return true; } } } return MathMLElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue, aMaybeScriptedPrincipal, aResult); } // https://mathml-refresh.github.io/mathml-core/#global-attributes static Element::MappedAttributeEntry sGlobalAttributes[] = { {nsGkAtoms::dir}, {nsGkAtoms::mathbackground_}, {nsGkAtoms::mathcolor_}, {nsGkAtoms::mathsize_}, {nsGkAtoms::scriptlevel_}, {nsGkAtoms::displaystyle_}, {nullptr}}; bool MathMLElement::IsAttributeMapped(const nsAtom* aAttribute) const { MOZ_ASSERT(IsMathMLElement()); static const MappedAttributeEntry* const globalMap[] = {sGlobalAttributes}; return FindAttributeDependence(aAttribute, globalMap) || ((!StaticPrefs::mathml_legacy_mathvariant_attribute_disabled() || mNodeInfo->Equals(nsGkAtoms::mi_)) && aAttribute == nsGkAtoms::mathvariant_) || (mNodeInfo->Equals(nsGkAtoms::mtable_) && aAttribute == nsGkAtoms::width); } nsMapRuleToAttributesFunc MathMLElement::GetAttributeMappingFunction() const { if (mNodeInfo->Equals(nsGkAtoms::mtable_)) { return &MapMTableAttributesInto; } if (StaticPrefs::mathml_legacy_mathvariant_attribute_disabled() && mNodeInfo->Equals(nsGkAtoms::mi_)) { return &MapMiAttributesInto; } return &MapGlobalMathMLAttributesInto; } /* static */ bool MathMLElement::ParseNamedSpaceValue(const nsString& aString, nsCSSValue& aCSSValue, uint32_t aFlags, const Document& aDocument) { if (StaticPrefs::mathml_mathspace_names_disabled()) { return false; } int32_t i = 0; // See if it is one of the 'namedspace' (ranging -7/18em, -6/18, ... 7/18em) if (aString.EqualsLiteral("veryverythinmathspace")) { i = 1; } else if (aString.EqualsLiteral("verythinmathspace")) { i = 2; } else if (aString.EqualsLiteral("thinmathspace")) { i = 3; } else if (aString.EqualsLiteral("mediummathspace")) { i = 4; } else if (aString.EqualsLiteral("thickmathspace")) { i = 5; } else if (aString.EqualsLiteral("verythickmathspace")) { i = 6; } else if (aString.EqualsLiteral("veryverythickmathspace")) { i = 7; } else if (aFlags & PARSE_ALLOW_NEGATIVE) { if (aString.EqualsLiteral("negativeveryverythinmathspace")) { i = -1; } else if (aString.EqualsLiteral("negativeverythinmathspace")) { i = -2; } else if (aString.EqualsLiteral("negativethinmathspace")) { i = -3; } else if (aString.EqualsLiteral("negativemediummathspace")) { i = -4; } else if (aString.EqualsLiteral("negativethickmathspace")) { i = -5; } else if (aString.EqualsLiteral("negativeverythickmathspace")) { i = -6; } else if (aString.EqualsLiteral("negativeveryverythickmathspace")) { i = -7; } } if (0 != i) { AutoTArray params; params.AppendElement(aString); aDocument.WarnOnceAbout( dom::DeprecatedOperations::eMathML_DeprecatedMathSpaceValue2, false, params); aCSSValue.SetFloatValue(float(i) / float(18), eCSSUnit_EM); return true; } return false; } // The REC says: // // "Most presentation elements have attributes that accept values representing // lengths to be used for size, spacing or similar properties. The syntax of a // length is specified as // // number | number unit | namedspace // // There should be no space between the number and the unit of a length." // // "A trailing '%' represents a percent of the default value. The default // value, or how it is obtained, is listed in the table of attributes for each // element. [...] A number without a unit is intepreted as a multiple of the // default value." // // "The possible units in MathML are: // // Unit Description // em an em (font-relative unit traditionally used for horizontal lengths) // ex an ex (font-relative unit traditionally used for vertical lengths) // px pixels, or size of a pixel in the current display // in inches (1 inch = 2.54 centimeters) // cm centimeters // mm millimeters // pt points (1 point = 1/72 inch) // pc picas (1 pica = 12 points) // % percentage of default value" // // The numbers are defined that way: // - unsigned-number: "a string of decimal digits with up to one decimal point // (U+002E), representing a non-negative terminating decimal number (a type of // rational number)" // - number: "an optional prefix of '-' (U+002D), followed by an unsigned // number, representing a terminating decimal number (a type of rational // number)" // /* static */ // XXXfredw: Deprecate legacy MathML syntax and use the CSS parser instead. // See https://github.com/mathml-refresh/mathml/issues/63 bool MathMLElement::ParseNumericValue(const nsString& aString, nsCSSValue& aCSSValue, uint32_t aFlags, Document* aDocument) { nsAutoString str(aString); str.CompressWhitespace(); // aString is const in this code... int32_t stringLength = str.Length(); if (!stringLength) { if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; } if (aDocument && ParseNamedSpaceValue(str, aCSSValue, aFlags, *aDocument)) { return true; } nsAutoString number, unit; // see if the negative sign is there int32_t i = 0; char16_t c = str[0]; if (c == '-') { number.Append(c); i++; } // Gather up characters that make up the number bool gotDot = false; for (; i < stringLength; i++) { c = str[i]; if (gotDot && c == '.') { if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; // two dots encountered } else if (c == '.') gotDot = true; else if (!IsAsciiDigit(c)) { str.Right(unit, stringLength - i); // some authors leave blanks before the unit, but that shouldn't // be allowed, so don't CompressWhitespace on 'unit'. break; } number.Append(c); } if (gotDot && str[i - 1] == '.') { if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; // Number ending with a dot. } // Convert number to floating point nsresult errorCode; float floatValue = number.ToFloat(&errorCode); if (NS_FAILED(errorCode)) { if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; } if (floatValue < 0 && !(aFlags & PARSE_ALLOW_NEGATIVE)) { if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; } nsCSSUnit cssUnit; if (unit.IsEmpty()) { // We are supposed to have a unit, but there isn't one. // If the value is 0 we can just call it "pixels" otherwise // this is illegal. if (floatValue != 0.0) { if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; } cssUnit = eCSSUnit_Pixel; } else if (unit.EqualsLiteral("%")) { aCSSValue.SetPercentValue(floatValue / 100.0f); return true; } else if (unit.LowerCaseEqualsLiteral("em")) cssUnit = eCSSUnit_EM; else if (unit.LowerCaseEqualsLiteral("ex")) cssUnit = eCSSUnit_XHeight; else if (unit.LowerCaseEqualsLiteral("px")) cssUnit = eCSSUnit_Pixel; else if (unit.LowerCaseEqualsLiteral("in")) cssUnit = eCSSUnit_Inch; else if (unit.LowerCaseEqualsLiteral("cm")) cssUnit = eCSSUnit_Centimeter; else if (unit.LowerCaseEqualsLiteral("mm")) cssUnit = eCSSUnit_Millimeter; else if (unit.LowerCaseEqualsLiteral("pt")) cssUnit = eCSSUnit_Point; else if (unit.LowerCaseEqualsLiteral("pc")) cssUnit = eCSSUnit_Pica; else if (unit.LowerCaseEqualsLiteral("q")) cssUnit = eCSSUnit_Quarter; else { // unexpected unit if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; } aCSSValue.SetFloatValue(floatValue, cssUnit); return true; } void MathMLElement::MapMTableAttributesInto( MappedDeclarationsBuilder& aBuilder) { // width // // "Specifies the desired width of the entire table and is intended for // visual user agents. When the value is a percentage value, the value is // relative to the horizontal space a MathML renderer has available for the // math element. When the value is "auto", the MathML renderer should // calculate the table width from its contents using whatever layout // algorithm it chooses. " // // values: "auto" | length // default: auto // if (!aBuilder.PropertyIsSet(eCSSProperty_width)) { const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::width); nsCSSValue width; // This does not handle auto and unitless values if (value && value->Type() == nsAttrValue::eString) { ParseNumericValue(value->GetStringValue(), width, 0, &aBuilder.Document()); if (width.GetUnit() == eCSSUnit_Percent) { aBuilder.SetPercentValue(eCSSProperty_width, width.GetPercentValue()); } else if (width.GetUnit() != eCSSUnit_Null) { aBuilder.SetLengthValue(eCSSProperty_width, width); } } } MapGlobalMathMLAttributesInto(aBuilder); } void MathMLElement::MapMiAttributesInto(MappedDeclarationsBuilder& aBuilder) { // mathvariant // https://w3c.github.io/mathml-core/#dfn-mathvariant if (!aBuilder.PropertyIsSet(eCSSProperty_text_transform)) { const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::mathvariant_); if (value && value->Type() == nsAttrValue::eString) { auto str = value->GetStringValue(); str.CompressWhitespace(); if (value->GetStringValue().LowerCaseEqualsASCII("normal")) { aBuilder.SetKeywordValue(eCSSProperty_text_transform, StyleTextTransformCase::None); } } } MapGlobalMathMLAttributesInto(aBuilder); } void MathMLElement::MapGlobalMathMLAttributesInto( MappedDeclarationsBuilder& aBuilder) { // scriptlevel // https://w3c.github.io/mathml-core/#dfn-scriptlevel const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::scriptlevel_); if (value && value->Type() == nsAttrValue::eString && !aBuilder.PropertyIsSet(eCSSProperty_math_depth)) { auto str = value->GetStringValue(); // FIXME: Should we remove whitespace trimming? // See https://github.com/w3c/mathml/issues/122 str.CompressWhitespace(); if (str.Length() > 0) { nsresult errorCode; int32_t intValue = str.ToInteger(&errorCode); bool reportParseError = true; if (NS_SUCCEEDED(errorCode)) { char16_t ch = str.CharAt(0); bool isRelativeScriptLevel = (ch == '+' || ch == '-'); // ToInteger is not very strict, check this is really . reportParseError = false; for (uint32_t i = isRelativeScriptLevel ? 1 : 0; i < str.Length(); i++) { if (!IsAsciiDigit(str.CharAt(i))) { reportParseError = true; break; } } if (!reportParseError) { aBuilder.SetMathDepthValue(intValue, isRelativeScriptLevel); } } if (reportParseError) { ReportParseErrorNoTag(str, nsGkAtoms::scriptlevel_, aBuilder.Document()); } } } // mathsize // https://w3c.github.io/mathml-core/#dfn-mathsize value = aBuilder.GetAttr(nsGkAtoms::mathsize_); if (value && value->Type() == nsAttrValue::eString && !aBuilder.PropertyIsSet(eCSSProperty_font_size)) { auto str = value->GetStringValue(); nsCSSValue fontSize; ParseNumericValue(str, fontSize, 0, nullptr); if (fontSize.GetUnit() == eCSSUnit_Percent) { aBuilder.SetPercentValue(eCSSProperty_font_size, fontSize.GetPercentValue()); } else if (fontSize.GetUnit() != eCSSUnit_Null) { aBuilder.SetLengthValue(eCSSProperty_font_size, fontSize); } } if (!StaticPrefs::mathml_legacy_mathvariant_attribute_disabled()) { // mathvariant // // "Specifies the logical class of the token. Note that this class is more // than styling, it typically conveys semantic intent;" // // values: "normal" | "bold" | "italic" | "bold-italic" | "double-struck" | // "bold-fraktur" | "script" | "bold-script" | "fraktur" | "sans-serif" | // "bold-sans-serif" | "sans-serif-italic" | "sans-serif-bold-italic" | // "monospace" | "initial" | "tailed" | "looped" | "stretched" // default: normal (except on ) // value = aBuilder.GetAttr(nsGkAtoms::mathvariant_); if (value && value->Type() == nsAttrValue::eString && !aBuilder.PropertyIsSet(eCSSProperty__moz_math_variant)) { auto str = value->GetStringValue(); str.CompressWhitespace(); static const char sizes[19][23] = {"normal", "bold", "italic", "bold-italic", "script", "bold-script", "fraktur", "double-struck", "bold-fraktur", "sans-serif", "bold-sans-serif", "sans-serif-italic", "sans-serif-bold-italic", "monospace", "initial", "tailed", "looped", "stretched"}; static const StyleMathVariant values[MOZ_ARRAY_LENGTH(sizes)] = { StyleMathVariant::Normal, StyleMathVariant::Bold, StyleMathVariant::Italic, StyleMathVariant::BoldItalic, StyleMathVariant::Script, StyleMathVariant::BoldScript, StyleMathVariant::Fraktur, StyleMathVariant::DoubleStruck, StyleMathVariant::BoldFraktur, StyleMathVariant::SansSerif, StyleMathVariant::BoldSansSerif, StyleMathVariant::SansSerifItalic, StyleMathVariant::SansSerifBoldItalic, StyleMathVariant::Monospace, StyleMathVariant::Initial, StyleMathVariant::Tailed, StyleMathVariant::Looped, StyleMathVariant::Stretched}; for (uint32_t i = 0; i < ArrayLength(sizes); ++i) { if (str.LowerCaseEqualsASCII(sizes[i])) { if (values[i] != StyleMathVariant::Normal) { // Warn about deprecated mathvariant attribute values. Strictly // speaking, we should also warn about mathvariant="normal" if the // element is not an . However this would require exposing the // tag name via aBuilder. Moreover, this use case is actually to // revert the effect of a non-normal mathvariant value on an // ancestor element, which should consequently have already // triggered a warning. AutoTArray params; params.AppendElement(str); aBuilder.Document().WarnOnceAbout( dom::DeprecatedOperations::eMathML_DeprecatedMathVariant, false, params); } aBuilder.SetKeywordValue(eCSSProperty__moz_math_variant, values[i]); break; } } } } // mathbackground // https://w3c.github.io/mathml-core/#dfn-mathbackground value = aBuilder.GetAttr(nsGkAtoms::mathbackground_); if (value) { nscolor color; if (value->GetColorValue(color)) { aBuilder.SetColorValueIfUnset(eCSSProperty_background_color, color); } } // mathcolor // https://w3c.github.io/mathml-core/#dfn-mathcolor value = aBuilder.GetAttr(nsGkAtoms::mathcolor_); nscolor color; if (value && value->GetColorValue(color)) { aBuilder.SetColorValueIfUnset(eCSSProperty_color, color); } // dir // https://w3c.github.io/mathml-core/#dfn-dir value = aBuilder.GetAttr(nsGkAtoms::dir); if (value && value->Type() == nsAttrValue::eString && !aBuilder.PropertyIsSet(eCSSProperty_direction)) { auto str = value->GetStringValue(); static const char dirs[][4] = {"ltr", "rtl"}; static const StyleDirection dirValues[MOZ_ARRAY_LENGTH(dirs)] = { StyleDirection::Ltr, StyleDirection::Rtl}; for (uint32_t i = 0; i < ArrayLength(dirs); ++i) { if (str.LowerCaseEqualsASCII(dirs[i])) { aBuilder.SetKeywordValue(eCSSProperty_direction, dirValues[i]); break; } } } // displaystyle // https://mathml-refresh.github.io/mathml-core/#dfn-displaystyle value = aBuilder.GetAttr(nsGkAtoms::displaystyle_); if (value && value->Type() == nsAttrValue::eString && !aBuilder.PropertyIsSet(eCSSProperty_math_style)) { auto str = value->GetStringValue(); static const char displaystyles[][6] = {"false", "true"}; static const StyleMathStyle mathStyle[MOZ_ARRAY_LENGTH(displaystyles)] = { StyleMathStyle::Compact, StyleMathStyle::Normal}; for (uint32_t i = 0; i < ArrayLength(displaystyles); ++i) { if (str.LowerCaseEqualsASCII(displaystyles[i])) { aBuilder.SetKeywordValue(eCSSProperty_math_style, mathStyle[i]); break; } } } } void MathMLElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) { Element::GetEventTargetParent(aVisitor); GetEventTargetParentForLinks(aVisitor); } nsresult MathMLElement::PostHandleEvent(EventChainPostVisitor& aVisitor) { return PostHandleEventForLinks(aVisitor); } NS_IMPL_ELEMENT_CLONE(MathMLElement) void MathMLElement::SetIncrementScriptLevel(bool aIncrementScriptLevel, bool aNotify) { NS_ASSERTION(aNotify, "We always notify!"); if (aIncrementScriptLevel) { AddStates(ElementState::INCREMENT_SCRIPT_LEVEL); } else { RemoveStates(ElementState::INCREMENT_SCRIPT_LEVEL); } } int32_t MathMLElement::TabIndexDefault() { return IsLink() ? 0 : -1; } // XXX Bug 1586011: Share logic with other element classes. Focusable MathMLElement::IsFocusableWithoutStyle(bool aWithMouse) { if (!IsInComposedDoc() || IsInDesignMode()) { // In designMode documents we only allow focusing the document. return {}; } int32_t tabIndex = TabIndex(); if (!IsLink()) { // If a tabindex is specified at all we're focusable if (GetTabIndexAttrValue().isSome()) { return {true, tabIndex}; } return {}; } if (!OwnerDoc()->LinkHandlingEnabled()) { return {}; } // Links that are in an editable region should never be focusable, even if // they are in a contenteditable="false" region. if (nsContentUtils::IsNodeInEditableRegion(this)) { return {}; } if ((sTabFocusModel & eTabFocus_linksMask) == 0) { tabIndex = -1; } return {true, tabIndex}; } already_AddRefed MathMLElement::GetHrefURI() const { // MathML href // The REC says: "When user agents encounter MathML elements with both href // and xlink:href attributes, the href attribute should take precedence." const nsAttrValue* href = mAttrs.GetAttr(nsGkAtoms::href, kNameSpaceID_None); if (!href) { return nullptr; } // Get absolute URI nsAutoString hrefStr; href->ToString(hrefStr); nsCOMPtr hrefURI; nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(hrefURI), hrefStr, OwnerDoc(), GetBaseURI()); return hrefURI.forget(); } bool MathMLElement::IsEventAttributeNameInternal(nsAtom* aName) { // The intent is to align MathML event attributes on HTML5, so the flag // EventNameType_HTML is used here. return nsContentUtils::IsEventAttributeName(aName, EventNameType_HTML); } void MathMLElement::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName, const nsAttrValue* aValue, bool aNotify) { if (aNamespaceID == kNameSpaceID_None) { if (!aValue && IsEventAttributeName(aName)) { if (EventListenerManager* manager = GetExistingListenerManager()) { manager->RemoveEventHandler(GetEventNameForAttr(aName)); } } } return MathMLElementBase::BeforeSetAttr(aNamespaceID, aName, aValue, aNotify); } void MathMLElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName, const nsAttrValue* aValue, const nsAttrValue* aOldValue, nsIPrincipal* aSubjectPrincipal, bool aNotify) { // It is important that this be done after the attribute is set/unset. // We will need the updated attribute value because notifying the document // that content states have changed will call IntrinsicState, which will try // to get updated information about the visitedness from Link. if (aName == nsGkAtoms::href && aNameSpaceID == kNameSpaceID_None) { Link::ResetLinkState(aNotify, aValue || Link::ElementHasHref()); } if (aNameSpaceID == kNameSpaceID_None) { if (IsEventAttributeName(aName) && aValue) { MOZ_ASSERT(aValue->Type() == nsAttrValue::eString, "Expected string value for script body"); SetEventHandler(GetEventNameForAttr(aName), aValue->GetStringValue()); } } return MathMLElementBase::AfterSetAttr(aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify); } JSObject* MathMLElement::WrapNode(JSContext* aCx, JS::Handle aGivenProto) { return MathMLElement_Binding::Wrap(aCx, this, aGivenProto); }