/* -*- 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 "nsMathMLElement.h" #include "base/compiler_specific.h" #include "mozilla/ArrayUtils.h" #include "nsGkAtoms.h" #include "nsCRT.h" #include "nsLayoutStylesheetCache.h" #include "nsRuleData.h" #include "nsCSSValue.h" #include "nsCSSParser.h" #include "nsMappedAttributes.h" #include "nsStyleConsts.h" #include "nsIDocument.h" #include "nsIPresShell.h" #include "nsPresContext.h" #include "mozAutoDocUpdate.h" #include "nsIScriptError.h" #include "nsContentUtils.h" #include "nsIURI.h" #include "mozilla/EventDispatcher.h" #include "mozilla/EventStates.h" #include "mozilla/dom/ElementBinding.h" using namespace mozilla; using namespace mozilla::dom; //---------------------------------------------------------------------- // nsISupports methods: NS_IMPL_ISUPPORTS_INHERITED(nsMathMLElement, nsMathMLElementBase, nsIDOMElement, nsIDOMNode, Link) static nsresult WarnDeprecated(const char16_t* aDeprecatedAttribute, const char16_t* aFavoredAttribute, nsIDocument* aDocument) { const char16_t *argv[] = { aDeprecatedAttribute, aFavoredAttribute }; return nsContentUtils:: ReportToConsole(nsIScriptError::warningFlag, NS_LITERAL_CSTRING("MathML"), aDocument, nsContentUtils::eMATHML_PROPERTIES, "DeprecatedSupersededBy", argv, 2); } static nsresult ReportLengthParseError(const nsString& aValue, nsIDocument* aDocument) { const char16_t *arg = aValue.get(); return nsContentUtils:: ReportToConsole(nsIScriptError::errorFlag, NS_LITERAL_CSTRING("MathML"), aDocument, nsContentUtils::eMATHML_PROPERTIES, "LengthParsingError", &arg, 1); } static nsresult ReportParseErrorNoTag(const nsString& aValue, nsIAtom* aAtom, nsIDocument* aDocument) { const char16_t *argv[] = { aValue.get(), aAtom->GetUTF16String() }; return nsContentUtils:: ReportToConsole(nsIScriptError::errorFlag, NS_LITERAL_CSTRING("MathML"), aDocument, nsContentUtils::eMATHML_PROPERTIES, "AttributeParsingErrorNoTag", argv, 2); } nsMathMLElement::nsMathMLElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo) : nsMathMLElementBase(aNodeInfo), ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)), mIncrementScriptLevel(false) { } nsMathMLElement::nsMathMLElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo) : nsMathMLElementBase(aNodeInfo), ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)), mIncrementScriptLevel(false) { } nsresult nsMathMLElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent, nsIContent* aBindingParent, bool aCompileEventHandlers) { Link::ResetLinkState(false, Link::ElementHasHref()); nsresult rv = nsMathMLElementBase::BindToTree(aDocument, aParent, aBindingParent, aCompileEventHandlers); NS_ENSURE_SUCCESS(rv, rv); if (aDocument) { aDocument->RegisterPendingLinkUpdate(this); } nsIDocument* doc = GetComposedDoc(); if (doc) { if (!doc->GetMathMLEnabled()) { // Enable MathML and setup the style sheet during binding, not element // construction, because we could move a MathML element from the document // that created it to another document. auto cache = nsLayoutStylesheetCache::For(doc->GetStyleBackendType()); doc->SetMathMLEnabled(); doc->EnsureOnDemandBuiltInUASheet(cache->MathMLSheet()); // Rebuild style data for the presshell, because style system // optimizations may have taken place assuming MathML was disabled. // (See nsRuleNode::CheckSpecifiedProperties.) nsCOMPtr<nsIPresShell> shell = doc->GetShell(); if (shell) { shell->GetPresContext()-> PostRebuildAllStyleDataEvent(nsChangeHint(0), eRestyle_Subtree); } } } return rv; } void nsMathMLElement::UnbindFromTree(bool aDeep, bool aNullParent) { // If this link is ever reinserted into a document, it might // be under a different xml:base, so forget the cached state now. Link::ResetLinkState(false, Link::ElementHasHref()); nsIDocument* doc = GetUncomposedDoc(); if (doc) { doc->UnregisterPendingLinkUpdate(this); } nsMathMLElementBase::UnbindFromTree(aDeep, aNullParent); } bool nsMathMLElement::ParseAttribute(int32_t aNamespaceID, nsIAtom* aAttribute, const nsAString& aValue, nsAttrValue& aResult) { if (aNamespaceID == kNameSpaceID_None) { if (IsMathMLElement(nsGkAtoms::math) && aAttribute == nsGkAtoms::mode) { WarnDeprecated(nsGkAtoms::mode->GetUTF16String(), nsGkAtoms::display->GetUTF16String(), OwnerDoc()); } if (aAttribute == nsGkAtoms::color) { WarnDeprecated(nsGkAtoms::color->GetUTF16String(), nsGkAtoms::mathcolor_->GetUTF16String(), OwnerDoc()); } if (aAttribute == nsGkAtoms::color || aAttribute == nsGkAtoms::mathcolor_ || aAttribute == nsGkAtoms::background || aAttribute == nsGkAtoms::mathbackground_) { return aResult.ParseColor(aValue); } } return nsMathMLElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue, aResult); } static Element::MappedAttributeEntry sMtableStyles[] = { { &nsGkAtoms::width }, { nullptr } }; static Element::MappedAttributeEntry sTokenStyles[] = { { &nsGkAtoms::mathsize_ }, { &nsGkAtoms::fontsize_ }, { &nsGkAtoms::color }, { &nsGkAtoms::fontfamily_ }, { &nsGkAtoms::fontstyle_ }, { &nsGkAtoms::fontweight_ }, { &nsGkAtoms::mathvariant_}, { nullptr } }; static Element::MappedAttributeEntry sEnvironmentStyles[] = { { &nsGkAtoms::scriptlevel_ }, { &nsGkAtoms::scriptminsize_ }, { &nsGkAtoms::scriptsizemultiplier_ }, { &nsGkAtoms::background }, { nullptr } }; static Element::MappedAttributeEntry sCommonPresStyles[] = { { &nsGkAtoms::mathcolor_ }, { &nsGkAtoms::mathbackground_ }, { nullptr } }; static Element::MappedAttributeEntry sDirStyles[] = { { &nsGkAtoms::dir }, { nullptr } }; bool nsMathMLElement::IsAttributeMapped(const nsIAtom* aAttribute) const { static const MappedAttributeEntry* const mtableMap[] = { sMtableStyles, sCommonPresStyles }; static const MappedAttributeEntry* const tokenMap[] = { sTokenStyles, sCommonPresStyles, sDirStyles }; static const MappedAttributeEntry* const mstyleMap[] = { sTokenStyles, sEnvironmentStyles, sCommonPresStyles, sDirStyles }; static const MappedAttributeEntry* const commonPresMap[] = { sCommonPresStyles }; static const MappedAttributeEntry* const mrowMap[] = { sCommonPresStyles, sDirStyles }; // We don't support mglyph (yet). if (IsAnyOfMathMLElements(nsGkAtoms::ms_, nsGkAtoms::mi_, nsGkAtoms::mn_, nsGkAtoms::mo_, nsGkAtoms::mtext_, nsGkAtoms::mspace_)) return FindAttributeDependence(aAttribute, tokenMap); if (IsAnyOfMathMLElements(nsGkAtoms::mstyle_, nsGkAtoms::math)) return FindAttributeDependence(aAttribute, mstyleMap); if (IsMathMLElement(nsGkAtoms::mtable_)) return FindAttributeDependence(aAttribute, mtableMap); if (IsMathMLElement(nsGkAtoms::mrow_)) return FindAttributeDependence(aAttribute, mrowMap); if (IsAnyOfMathMLElements(nsGkAtoms::maction_, nsGkAtoms::maligngroup_, nsGkAtoms::malignmark_, nsGkAtoms::menclose_, nsGkAtoms::merror_, nsGkAtoms::mfenced_, nsGkAtoms::mfrac_, nsGkAtoms::mover_, nsGkAtoms::mpadded_, nsGkAtoms::mphantom_, nsGkAtoms::mprescripts_, nsGkAtoms::mroot_, nsGkAtoms::msqrt_, nsGkAtoms::msub_, nsGkAtoms::msubsup_, nsGkAtoms::msup_, nsGkAtoms::mtd_, nsGkAtoms::mtr_, nsGkAtoms::munder_, nsGkAtoms::munderover_, nsGkAtoms::none)) { return FindAttributeDependence(aAttribute, commonPresMap); } return false; } nsMapRuleToAttributesFunc nsMathMLElement::GetAttributeMappingFunction() const { // It doesn't really matter what our tag is here, because only attributes // that satisfy IsAttributeMapped will be stored in the mapped attributes // list and available to the mapping function return &MapMathMLAttributesInto; } /* static */ bool nsMathMLElement::ParseNamedSpaceValue(const nsString& aString, nsCSSValue& aCSSValue, uint32_t aFlags) { 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) { 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 */ bool nsMathMLElement::ParseNumericValue(const nsString& aString, nsCSSValue& aCSSValue, uint32_t aFlags, nsIDocument* 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 (ParseNamedSpaceValue(str, aCSSValue, aFlags)) { 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 (!nsCRT::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); } // 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()) { if (aFlags & PARSE_ALLOW_UNITLESS) { // no explicit unit, this is a number that will act as a multiplier if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, NS_LITERAL_CSTRING("MathML"), aDocument, nsContentUtils::eMATHML_PROPERTIES, "UnitlessValuesAreDeprecated"); } if (aFlags & CONVERT_UNITLESS_TO_PERCENT) { aCSSValue.SetPercentValue(floatValue); return true; } else cssUnit = eCSSUnit_Number; } else { // 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.EqualsLiteral("em")) cssUnit = eCSSUnit_EM; else if (unit.EqualsLiteral("ex")) cssUnit = eCSSUnit_XHeight; else if (unit.EqualsLiteral("px")) cssUnit = eCSSUnit_Pixel; else if (unit.EqualsLiteral("in")) cssUnit = eCSSUnit_Inch; else if (unit.EqualsLiteral("cm")) cssUnit = eCSSUnit_Centimeter; else if (unit.EqualsLiteral("mm")) cssUnit = eCSSUnit_Millimeter; else if (unit.EqualsLiteral("pt")) cssUnit = eCSSUnit_Point; else if (unit.EqualsLiteral("pc")) cssUnit = eCSSUnit_Pica; else if (unit.EqualsLiteral("q")) cssUnit = eCSSUnit_Quarter; else { // unexpected unit if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) { ReportLengthParseError(aString, aDocument); } return false; } aCSSValue.SetFloatValue(floatValue, cssUnit); return true; } void nsMathMLElement::MapMathMLAttributesInto(const nsMappedAttributes* aAttributes, nsRuleData* aData) { if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Font)) { // scriptsizemultiplier // // "Specifies the multiplier to be used to adjust font size due to changes // in scriptlevel. // // values: number // default: 0.71 // const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::scriptsizemultiplier_); nsCSSValue* scriptSizeMultiplier = aData->ValueForScriptSizeMultiplier(); if (value && value->Type() == nsAttrValue::eString && scriptSizeMultiplier->GetUnit() == eCSSUnit_Null) { nsAutoString str(value->GetStringValue()); str.CompressWhitespace(); // MathML numbers can't have leading '+' if (str.Length() > 0 && str.CharAt(0) != '+') { nsresult errorCode; float floatValue = str.ToFloat(&errorCode); // Negative scriptsizemultipliers are not parsed if (NS_SUCCEEDED(errorCode) && floatValue >= 0.0f) { scriptSizeMultiplier->SetFloatValue(floatValue, eCSSUnit_Number); } else { ReportParseErrorNoTag(str, nsGkAtoms::scriptsizemultiplier_, aData->mPresContext->Document()); } } } // scriptminsize // // "Specifies the minimum font size allowed due to changes in scriptlevel. // Note that this does not limit the font size due to changes to mathsize." // // values: length // default: 8pt // // We don't allow negative values. // Unitless and percent values give a multiple of the default value. // value = aAttributes->GetAttr(nsGkAtoms::scriptminsize_); nsCSSValue* scriptMinSize = aData->ValueForScriptMinSize(); if (value && value->Type() == nsAttrValue::eString && scriptMinSize->GetUnit() == eCSSUnit_Null) { ParseNumericValue(value->GetStringValue(), *scriptMinSize, PARSE_ALLOW_UNITLESS | CONVERT_UNITLESS_TO_PERCENT, aData->mPresContext->Document()); if (scriptMinSize->GetUnit() == eCSSUnit_Percent) { scriptMinSize->SetFloatValue(8.0 * scriptMinSize->GetPercentValue(), eCSSUnit_Point); } } // scriptlevel // // "Changes the scriptlevel in effect for the children. When the value is // given without a sign, it sets scriptlevel to the specified value; when a // sign is given, it increments ("+") or decrements ("-") the current // value. (Note that large decrements can result in negative values of // scriptlevel, but these values are considered legal.)" // // values: ( "+" | "-" )? unsigned-integer // default: inherited // value = aAttributes->GetAttr(nsGkAtoms::scriptlevel_); nsCSSValue* scriptLevel = aData->ValueForScriptLevel(); if (value && value->Type() == nsAttrValue::eString && scriptLevel->GetUnit() == eCSSUnit_Null) { nsAutoString str(value->GetStringValue()); str.CompressWhitespace(); if (str.Length() > 0) { nsresult errorCode; int32_t intValue = str.ToInteger(&errorCode); if (NS_SUCCEEDED(errorCode)) { // This is kind of cheesy ... if the scriptlevel has a sign, // then it's a relative value and we store the nsCSSValue as an // Integer to indicate that. Otherwise we store it as a Number // to indicate that the scriptlevel is absolute. char16_t ch = str.CharAt(0); if (ch == '+' || ch == '-') { scriptLevel->SetIntValue(intValue, eCSSUnit_Integer); } else { scriptLevel->SetFloatValue(intValue, eCSSUnit_Number); } } else { ReportParseErrorNoTag(str, nsGkAtoms::scriptlevel_, aData->mPresContext->Document()); } } } // mathsize // // "Specifies the size to display the token content. The values 'small' and // 'big' choose a size smaller or larger than the current font size, but // leave the exact proportions unspecified; 'normal' is allowed for // completeness, but since it is equivalent to '100%' or '1em', it has no // effect." // // values: "small" | "normal" | "big" | length // default: inherited // // fontsize // // "Specified the size for the token. Deprecated in favor of mathsize." // // values: length // default: inherited // // In both cases, we don't allow negative values. // Unitless values give a multiple of the default value. // bool parseSizeKeywords = true; value = aAttributes->GetAttr(nsGkAtoms::mathsize_); if (!value) { parseSizeKeywords = false; value = aAttributes->GetAttr(nsGkAtoms::fontsize_); if (value) { WarnDeprecated(nsGkAtoms::fontsize_->GetUTF16String(), nsGkAtoms::mathsize_->GetUTF16String(), aData->mPresContext->Document()); } } nsCSSValue* fontSize = aData->ValueForFontSize(); if (value && value->Type() == nsAttrValue::eString && fontSize->GetUnit() == eCSSUnit_Null) { nsAutoString str(value->GetStringValue()); if (!ParseNumericValue(str, *fontSize, PARSE_SUPPRESS_WARNINGS | PARSE_ALLOW_UNITLESS | CONVERT_UNITLESS_TO_PERCENT, nullptr) && parseSizeKeywords) { static const char sizes[3][7] = { "small", "normal", "big" }; static const int32_t values[MOZ_ARRAY_LENGTH(sizes)] = { NS_STYLE_FONT_SIZE_SMALL, NS_STYLE_FONT_SIZE_MEDIUM, NS_STYLE_FONT_SIZE_LARGE }; str.CompressWhitespace(); for (uint32_t i = 0; i < ArrayLength(sizes); ++i) { if (str.EqualsASCII(sizes[i])) { fontSize->SetIntValue(values[i], eCSSUnit_Enumerated); break; } } } } // fontfamily // // "Should be the name of a font that may be available to a MathML renderer, // or a CSS font specification; See Section 6.5 Using CSS with MathML and // CSS for more information. Deprecated in favor of mathvariant." // // values: string // value = aAttributes->GetAttr(nsGkAtoms::fontfamily_); nsCSSValue* fontFamily = aData->ValueForFontFamily(); if (value) { WarnDeprecated(nsGkAtoms::fontfamily_->GetUTF16String(), nsGkAtoms::mathvariant_->GetUTF16String(), aData->mPresContext->Document()); } if (value && value->Type() == nsAttrValue::eString && fontFamily->GetUnit() == eCSSUnit_Null) { nsCSSParser parser; parser.ParseFontFamilyListString(value->GetStringValue(), nullptr, 0, *fontFamily); } // fontstyle // // "Specified the font style to use for the token. Deprecated in favor of // mathvariant." // // values: "normal" | "italic" // default: normal (except on <mi>) // // Note that the font-style property is reset in layout/style/ when // -moz-math-variant is specified. nsCSSValue* fontStyle = aData->ValueForFontStyle(); value = aAttributes->GetAttr(nsGkAtoms::fontstyle_); if (value) { WarnDeprecated(nsGkAtoms::fontstyle_->GetUTF16String(), nsGkAtoms::mathvariant_->GetUTF16String(), aData->mPresContext->Document()); if (value->Type() == nsAttrValue::eString && fontStyle->GetUnit() == eCSSUnit_Null) { nsAutoString str(value->GetStringValue()); str.CompressWhitespace(); if (str.EqualsASCII("normal")) { fontStyle->SetIntValue(NS_STYLE_FONT_STYLE_NORMAL, eCSSUnit_Enumerated); } else if (str.EqualsASCII("italic")) { fontStyle->SetIntValue(NS_STYLE_FONT_STYLE_ITALIC, eCSSUnit_Enumerated); } } } // fontweight // // "Specified the font weight for the token. Deprecated in favor of // mathvariant." // // values: "normal" | "bold" // default: normal // // Note that the font-weight property is reset in layout/style/ when // -moz-math-variant is specified. nsCSSValue* fontWeight = aData->ValueForFontWeight(); value = aAttributes->GetAttr(nsGkAtoms::fontweight_); if (value) { WarnDeprecated(nsGkAtoms::fontweight_->GetUTF16String(), nsGkAtoms::mathvariant_->GetUTF16String(), aData->mPresContext->Document()); if (value->Type() == nsAttrValue::eString && fontWeight->GetUnit() == eCSSUnit_Null) { nsAutoString str(value->GetStringValue()); str.CompressWhitespace(); if (str.EqualsASCII("normal")) { fontWeight->SetIntValue(NS_STYLE_FONT_WEIGHT_NORMAL, eCSSUnit_Enumerated); } else if (str.EqualsASCII("bold")) { fontWeight->SetIntValue(NS_STYLE_FONT_WEIGHT_BOLD, eCSSUnit_Enumerated); } } } // 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 <mi>) // nsCSSValue* mathVariant = aData->ValueForMathVariant(); value = aAttributes->GetAttr(nsGkAtoms::mathvariant_); if (value && value->Type() == nsAttrValue::eString && mathVariant->GetUnit() == eCSSUnit_Null) { nsAutoString 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 int32_t values[MOZ_ARRAY_LENGTH(sizes)] = { NS_MATHML_MATHVARIANT_NORMAL, NS_MATHML_MATHVARIANT_BOLD, NS_MATHML_MATHVARIANT_ITALIC, NS_MATHML_MATHVARIANT_BOLD_ITALIC, NS_MATHML_MATHVARIANT_SCRIPT, NS_MATHML_MATHVARIANT_BOLD_SCRIPT, NS_MATHML_MATHVARIANT_FRAKTUR, NS_MATHML_MATHVARIANT_DOUBLE_STRUCK, NS_MATHML_MATHVARIANT_BOLD_FRAKTUR, NS_MATHML_MATHVARIANT_SANS_SERIF, NS_MATHML_MATHVARIANT_BOLD_SANS_SERIF, NS_MATHML_MATHVARIANT_SANS_SERIF_ITALIC, NS_MATHML_MATHVARIANT_SANS_SERIF_BOLD_ITALIC, NS_MATHML_MATHVARIANT_MONOSPACE, NS_MATHML_MATHVARIANT_INITIAL, NS_MATHML_MATHVARIANT_TAILED, NS_MATHML_MATHVARIANT_LOOPED, NS_MATHML_MATHVARIANT_STRETCHED }; for (uint32_t i = 0; i < ArrayLength(sizes); ++i) { if (str.EqualsASCII(sizes[i])) { mathVariant->SetIntValue(values[i], eCSSUnit_Enumerated); break; } } } } // mathbackground // // "Specifies the background color to be used to fill in the bounding box of // the element and its children. The default, 'transparent', lets the // background color, if any, used in the current rendering context to show // through." // // values: color | "transparent" // default: "transparent" // // background // // "Specified the background color to be used to fill in the bounding box of // the element and its children. Deprecated in favor of mathbackground." // // values: color | "transparent" // default: "transparent" // if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Background)) { const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::mathbackground_); if (!value) { value = aAttributes->GetAttr(nsGkAtoms::background); if (value) { WarnDeprecated(nsGkAtoms::background->GetUTF16String(), nsGkAtoms::mathbackground_->GetUTF16String(), aData->mPresContext->Document()); } } nsCSSValue* backgroundColor = aData->ValueForBackgroundColor(); if (value && backgroundColor->GetUnit() == eCSSUnit_Null) { nscolor color; if (value->GetColorValue(color)) { backgroundColor->SetColorValue(color); } } } // mathcolor // // "Specifies the foreground color to use when drawing the components of this // element, such as the content for token elements or any lines, surds, or // other decorations. It also establishes the default mathcolor used for // child elements when used on a layout element." // // values: color // default: inherited // // color // // "Specified the color for the token. Deprecated in favor of mathcolor." // // values: color // default: inherited // if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) { const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::mathcolor_); if (!value) { value = aAttributes->GetAttr(nsGkAtoms::color); if (value) { WarnDeprecated(nsGkAtoms::color->GetUTF16String(), nsGkAtoms::mathcolor_->GetUTF16String(), aData->mPresContext->Document()); } } nscolor color; nsCSSValue* colorValue = aData->ValueForColor(); if (value && value->GetColorValue(color) && colorValue->GetUnit() == eCSSUnit_Null) { colorValue->SetColorValue(color); } } if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Position)) { // 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 // nsCSSValue* width = aData->ValueForWidth(); if (width->GetUnit() == eCSSUnit_Null) { const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::width); // This does not handle auto and unitless values if (value && value->Type() == nsAttrValue::eString) { ParseNumericValue(value->GetStringValue(), *width, 0, aData->mPresContext->Document()); } } } // dir // // Overall Directionality of Mathematics Formulas: // "The overall directionality for a formula, basically the direction of the // Layout Schemata, is specified by the dir attribute on the containing math // element (see Section 2.2 The Top-Level math Element). The default is ltr. // [...] The overall directionality is usually set on the math, but may also // be switched for individual subformula by using the dir attribute on mrow // or mstyle elements." // // Bidirectional Layout in Token Elements: // "Specifies the initial directionality for text within the token: // ltr (Left To Right) or rtl (Right To Left). This attribute should only be // needed in rare cases involving weak or neutral characters; // see Section 3.1.5.1 Overall Directionality of Mathematics Formulas for // further discussion. It has no effect on mspace." // // values: "ltr" | "rtl" // default: inherited // if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Visibility)) { const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::dir); nsCSSValue* direction = aData->ValueForDirection(); if (value && value->Type() == nsAttrValue::eString && direction->GetUnit() == eCSSUnit_Null) { nsAutoString str(value->GetStringValue()); static const char dirs[][4] = { "ltr", "rtl" }; static const int32_t dirValues[MOZ_ARRAY_LENGTH(dirs)] = { NS_STYLE_DIRECTION_LTR, NS_STYLE_DIRECTION_RTL }; for (uint32_t i = 0; i < ArrayLength(dirs); ++i) { if (str.EqualsASCII(dirs[i])) { direction->SetIntValue(dirValues[i], eCSSUnit_Enumerated); break; } } } } } nsresult nsMathMLElement::PreHandleEvent(EventChainPreVisitor& aVisitor) { nsresult rv = Element::PreHandleEvent(aVisitor); NS_ENSURE_SUCCESS(rv, rv); return PreHandleEventForLinks(aVisitor); } nsresult nsMathMLElement::PostHandleEvent(EventChainPostVisitor& aVisitor) { return PostHandleEventForLinks(aVisitor); } NS_IMPL_ELEMENT_CLONE(nsMathMLElement) EventStates nsMathMLElement::IntrinsicState() const { return Link::LinkState() | nsMathMLElementBase::IntrinsicState() | (mIncrementScriptLevel ? NS_EVENT_STATE_INCREMENT_SCRIPT_LEVEL : EventStates()); } bool nsMathMLElement::IsNodeOfType(uint32_t aFlags) const { return !(aFlags & ~eCONTENT); } void nsMathMLElement::SetIncrementScriptLevel(bool aIncrementScriptLevel, bool aNotify) { if (aIncrementScriptLevel == mIncrementScriptLevel) return; mIncrementScriptLevel = aIncrementScriptLevel; NS_ASSERTION(aNotify, "We always notify!"); UpdateState(true); } bool nsMathMLElement::IsFocusableInternal(int32_t* aTabIndex, bool aWithMouse) { nsCOMPtr<nsIURI> uri; if (IsLink(getter_AddRefs(uri))) { if (aTabIndex) { *aTabIndex = ((sTabFocusModel & eTabFocus_linksMask) == 0 ? -1 : 0); } return true; } if (aTabIndex) { *aTabIndex = -1; } return false; } bool nsMathMLElement::IsLink(nsIURI** aURI) const { // http://www.w3.org/TR/2010/REC-MathML3-20101021/chapter6.html#interf.link // The REC says that the following elements should not be linking elements: if (IsAnyOfMathMLElements(nsGkAtoms::mprescripts_, nsGkAtoms::none, nsGkAtoms::malignmark_, nsGkAtoms::maligngroup_)) { *aURI = nullptr; return false; } bool hasHref = false; const nsAttrValue* href = mAttrsAndChildren.GetAttr(nsGkAtoms::href, kNameSpaceID_None); if (href) { // MathML href // The REC says: "When user agents encounter MathML elements with both href // and xlink:href attributes, the href attribute should take precedence." hasHref = true; } else { // To be a clickable XLink for styling and interaction purposes, we require: // // xlink:href - must be set // xlink:type - must be unset or set to "" or set to "simple" // xlink:show - must be unset or set to "", "new" or "replace" // xlink:actuate - must be unset or set to "" or "onRequest" // // For any other values, we're either not a *clickable* XLink, or the end // result is poorly specified. Either way, we return false. static nsIContent::AttrValuesArray sTypeVals[] = { &nsGkAtoms::_empty, &nsGkAtoms::simple, nullptr }; static nsIContent::AttrValuesArray sShowVals[] = { &nsGkAtoms::_empty, &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr }; static nsIContent::AttrValuesArray sActuateVals[] = { &nsGkAtoms::_empty, &nsGkAtoms::onRequest, nullptr }; // Optimization: check for href first for early return href = mAttrsAndChildren.GetAttr(nsGkAtoms::href, kNameSpaceID_XLink); if (href && FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::type, sTypeVals, eCaseMatters) != nsIContent::ATTR_VALUE_NO_MATCH && FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show, sShowVals, eCaseMatters) != nsIContent::ATTR_VALUE_NO_MATCH && FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::actuate, sActuateVals, eCaseMatters) != nsIContent::ATTR_VALUE_NO_MATCH) { hasHref = true; } } if (hasHref) { nsCOMPtr<nsIURI> baseURI = GetBaseURI(); // Get absolute URI nsAutoString hrefStr; href->ToString(hrefStr); nsContentUtils::NewURIWithDocumentCharset(aURI, hrefStr, OwnerDoc(), baseURI); // must promise out param is non-null if we return true return !!*aURI; } *aURI = nullptr; return false; } void nsMathMLElement::GetLinkTarget(nsAString& aTarget) { const nsAttrValue* target = mAttrsAndChildren.GetAttr(nsGkAtoms::target, kNameSpaceID_XLink); if (target) { target->ToString(aTarget); } if (aTarget.IsEmpty()) { static nsIContent::AttrValuesArray sShowVals[] = { &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr }; switch (FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show, sShowVals, eCaseMatters)) { case 0: aTarget.AssignLiteral("_blank"); return; case 1: return; } OwnerDoc()->GetBaseTarget(aTarget); } } already_AddRefed<nsIURI> nsMathMLElement::GetHrefURI() const { nsCOMPtr<nsIURI> hrefURI; return IsLink(getter_AddRefs(hrefURI)) ? hrefURI.forget() : nullptr; } nsresult nsMathMLElement::SetAttr(int32_t aNameSpaceID, nsIAtom* aName, nsIAtom* aPrefix, const nsAString& aValue, bool aNotify) { nsresult rv = nsMathMLElementBase::SetAttr(aNameSpaceID, aName, aPrefix, aValue, aNotify); // The ordering of the parent class's SetAttr call and Link::ResetLinkState // is important here! The attribute is not set until SetAttr returns, and // 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 || aNameSpaceID == kNameSpaceID_XLink)) { if (aNameSpaceID == kNameSpaceID_XLink) { WarnDeprecated(u"xlink:href", u"href", OwnerDoc()); } Link::ResetLinkState(!!aNotify, true); } return rv; } nsresult nsMathMLElement::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttr, bool aNotify) { nsresult rv = nsMathMLElementBase::UnsetAttr(aNameSpaceID, aAttr, aNotify); // The ordering of the parent class's UnsetAttr call and Link::ResetLinkState // is important here! The attribute is not unset until UnsetAttr returns, and // 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 (aAttr == nsGkAtoms::href && (aNameSpaceID == kNameSpaceID_None || aNameSpaceID == kNameSpaceID_XLink)) { // Note: just because we removed a single href attr doesn't mean there's no href, // since there are 2 possible namespaces. Link::ResetLinkState(!!aNotify, Link::ElementHasHref()); } return rv; } JSObject* nsMathMLElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) { return ElementBinding::Wrap(aCx, this, aGivenProto); }