| /* |
| * Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved. |
| * Copyright (C) 2010 Apple Inc. All rights reserved. |
| * Copyright (C) 2016 Igalia S.L. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "MathMLPresentationElement.h" |
| |
| #if ENABLE(MATHML) |
| |
| #include "ElementIterator.h" |
| #include "HTMLHtmlElement.h" |
| #include "HTMLMapElement.h" |
| #include "HTMLNames.h" |
| #include "HTMLParserIdioms.h" |
| #include "MathMLMathElement.h" |
| #include "MathMLNames.h" |
| #include "RenderMathMLBlock.h" |
| #include "RenderTableCell.h" |
| #include "SVGSVGElement.h" |
| #include <wtf/IsoMallocInlines.h> |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(MathMLPresentationElement); |
| |
| using namespace MathMLNames; |
| |
| MathMLPresentationElement::MathMLPresentationElement(const QualifiedName& tagName, Document& document) |
| : MathMLElement(tagName, document) |
| { |
| } |
| |
| Ref<MathMLPresentationElement> MathMLPresentationElement::create(const QualifiedName& tagName, Document& document) |
| { |
| return adoptRef(*new MathMLPresentationElement(tagName, document)); |
| } |
| |
| RenderPtr<RenderElement> MathMLPresentationElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition& insertionPosition) |
| { |
| if (hasTagName(mtableTag)) |
| return createRenderer<RenderMathMLTable>(*this, WTFMove(style)); |
| |
| return MathMLElement::createElementRenderer(WTFMove(style), insertionPosition); |
| } |
| |
| bool MathMLPresentationElement::isPhrasingContent(const Node& node) |
| { |
| // Phrasing content is described in the HTML 5 specification: |
| // http://www.w3.org/TR/html5/dom.html#phrasing-content. |
| |
| if (!node.isElementNode()) |
| return node.isTextNode(); |
| |
| if (is<MathMLElement>(node)) { |
| auto& mathmlElement = downcast<MathMLElement>(node); |
| return is<MathMLMathElement>(mathmlElement); |
| } |
| |
| if (is<SVGElement>(node)) { |
| auto& svgElement = downcast<SVGElement>(node); |
| return is<SVGSVGElement>(svgElement); |
| } |
| |
| if (is<HTMLElement>(node)) { |
| // FIXME: add the <data> and <time> tags when they are implemented. |
| auto& htmlElement = downcast<HTMLElement>(node); |
| return htmlElement.hasTagName(HTMLNames::aTag) |
| || htmlElement.hasTagName(HTMLNames::abbrTag) |
| || (htmlElement.hasTagName(HTMLNames::areaTag) && ancestorsOfType<HTMLMapElement>(htmlElement).first()) |
| || htmlElement.hasTagName(HTMLNames::audioTag) |
| || htmlElement.hasTagName(HTMLNames::bTag) |
| || htmlElement.hasTagName(HTMLNames::bdiTag) |
| || htmlElement.hasTagName(HTMLNames::bdoTag) |
| || htmlElement.hasTagName(HTMLNames::brTag) |
| || htmlElement.hasTagName(HTMLNames::buttonTag) |
| || htmlElement.hasTagName(HTMLNames::canvasTag) |
| || htmlElement.hasTagName(HTMLNames::citeTag) |
| || htmlElement.hasTagName(HTMLNames::codeTag) |
| || htmlElement.hasTagName(HTMLNames::datalistTag) |
| || htmlElement.hasTagName(HTMLNames::delTag) |
| || htmlElement.hasTagName(HTMLNames::dfnTag) |
| || htmlElement.hasTagName(HTMLNames::emTag) |
| || htmlElement.hasTagName(HTMLNames::embedTag) |
| || htmlElement.hasTagName(HTMLNames::iTag) |
| || htmlElement.hasTagName(HTMLNames::iframeTag) |
| || htmlElement.hasTagName(HTMLNames::imgTag) |
| || htmlElement.hasTagName(HTMLNames::inputTag) |
| || htmlElement.hasTagName(HTMLNames::insTag) |
| || htmlElement.hasTagName(HTMLNames::kbdTag) |
| || htmlElement.hasTagName(HTMLNames::keygenTag) |
| || htmlElement.hasTagName(HTMLNames::labelTag) |
| || htmlElement.hasTagName(HTMLNames::mapTag) |
| || htmlElement.hasTagName(HTMLNames::markTag) |
| || htmlElement.hasTagName(HTMLNames::meterTag) |
| || htmlElement.hasTagName(HTMLNames::noscriptTag) |
| || htmlElement.hasTagName(HTMLNames::objectTag) |
| || htmlElement.hasTagName(HTMLNames::outputTag) |
| || htmlElement.hasTagName(HTMLNames::progressTag) |
| || htmlElement.hasTagName(HTMLNames::qTag) |
| || htmlElement.hasTagName(HTMLNames::rubyTag) |
| || htmlElement.hasTagName(HTMLNames::sTag) |
| || htmlElement.hasTagName(HTMLNames::sampTag) |
| || htmlElement.hasTagName(HTMLNames::scriptTag) |
| || htmlElement.hasTagName(HTMLNames::selectTag) |
| || htmlElement.hasTagName(HTMLNames::smallTag) |
| || htmlElement.hasTagName(HTMLNames::spanTag) |
| || htmlElement.hasTagName(HTMLNames::strongTag) |
| || htmlElement.hasTagName(HTMLNames::subTag) |
| || htmlElement.hasTagName(HTMLNames::supTag) |
| || htmlElement.hasTagName(HTMLNames::templateTag) |
| || htmlElement.hasTagName(HTMLNames::textareaTag) |
| || htmlElement.hasTagName(HTMLNames::uTag) |
| || htmlElement.hasTagName(HTMLNames::varTag) |
| || htmlElement.hasTagName(HTMLNames::videoTag) |
| || htmlElement.hasTagName(HTMLNames::wbrTag); |
| } |
| |
| return false; |
| } |
| |
| bool MathMLPresentationElement::isFlowContent(const Node& node) |
| { |
| // Flow content is described in the HTML 5 specification: |
| // http://www.w3.org/TR/html5/dom.html#flow-content |
| |
| if (isPhrasingContent(node)) |
| return true; |
| |
| if (!is<HTMLElement>(node)) |
| return false; |
| |
| auto& htmlElement = downcast<HTMLElement>(node); |
| // FIXME add the <dialog> tag when it is implemented. |
| return htmlElement.hasTagName(HTMLNames::addressTag) |
| || htmlElement.hasTagName(HTMLNames::articleTag) |
| || htmlElement.hasTagName(HTMLNames::asideTag) |
| || htmlElement.hasTagName(HTMLNames::blockquoteTag) |
| || htmlElement.hasTagName(HTMLNames::detailsTag) |
| || htmlElement.hasTagName(HTMLNames::divTag) |
| || htmlElement.hasTagName(HTMLNames::dlTag) |
| || htmlElement.hasTagName(HTMLNames::fieldsetTag) |
| || htmlElement.hasTagName(HTMLNames::figureTag) |
| || htmlElement.hasTagName(HTMLNames::footerTag) |
| || htmlElement.hasTagName(HTMLNames::formTag) |
| || htmlElement.hasTagName(HTMLNames::h1Tag) |
| || htmlElement.hasTagName(HTMLNames::h2Tag) |
| || htmlElement.hasTagName(HTMLNames::h3Tag) |
| || htmlElement.hasTagName(HTMLNames::h4Tag) |
| || htmlElement.hasTagName(HTMLNames::h5Tag) |
| || htmlElement.hasTagName(HTMLNames::h6Tag) |
| || htmlElement.hasTagName(HTMLNames::headerTag) |
| || htmlElement.hasTagName(HTMLNames::hrTag) |
| || htmlElement.hasTagName(HTMLNames::mainTag) |
| || htmlElement.hasTagName(HTMLNames::navTag) |
| || htmlElement.hasTagName(HTMLNames::olTag) |
| || htmlElement.hasTagName(HTMLNames::pTag) |
| || htmlElement.hasTagName(HTMLNames::preTag) |
| || htmlElement.hasTagName(HTMLNames::sectionTag) |
| || (htmlElement.hasTagName(HTMLNames::styleTag) && htmlElement.hasAttribute("scoped")) |
| || htmlElement.hasTagName(HTMLNames::tableTag) |
| || htmlElement.hasTagName(HTMLNames::ulTag); |
| } |
| |
| const MathMLElement::BooleanValue& MathMLPresentationElement::cachedBooleanAttribute(const QualifiedName& name, std::optional<BooleanValue>& attribute) |
| { |
| if (attribute) |
| return attribute.value(); |
| |
| // In MathML, attribute values are case-sensitive. |
| const AtomicString& value = attributeWithoutSynchronization(name); |
| if (value == "true") |
| attribute = BooleanValue::True; |
| else if (value == "false") |
| attribute = BooleanValue::False; |
| else |
| attribute = BooleanValue::Default; |
| |
| return attribute.value(); |
| } |
| |
| MathMLElement::Length MathMLPresentationElement::parseNumberAndUnit(const StringView& string) |
| { |
| LengthType lengthType = LengthType::UnitLess; |
| unsigned stringLength = string.length(); |
| UChar lastChar = string[stringLength - 1]; |
| if (lastChar == '%') { |
| lengthType = LengthType::Percentage; |
| stringLength--; |
| } else if (stringLength >= 2) { |
| UChar penultimateChar = string[stringLength - 2]; |
| if (penultimateChar == 'c' && lastChar == 'm') |
| lengthType = LengthType::Cm; |
| if (penultimateChar == 'e' && lastChar == 'm') |
| lengthType = LengthType::Em; |
| else if (penultimateChar == 'e' && lastChar == 'x') |
| lengthType = LengthType::Ex; |
| else if (penultimateChar == 'i' && lastChar == 'n') |
| lengthType = LengthType::In; |
| else if (penultimateChar == 'm' && lastChar == 'm') |
| lengthType = LengthType::Mm; |
| else if (penultimateChar == 'p' && lastChar == 'c') |
| lengthType = LengthType::Pc; |
| else if (penultimateChar == 'p' && lastChar == 't') |
| lengthType = LengthType::Pt; |
| else if (penultimateChar == 'p' && lastChar == 'x') |
| lengthType = LengthType::Px; |
| |
| if (lengthType != LengthType::UnitLess) |
| stringLength -= 2; |
| } |
| |
| bool ok; |
| float lengthValue = string.substring(0, stringLength).toFloat(ok); |
| if (!ok) |
| return Length(); |
| |
| Length length; |
| length.type = lengthType; |
| length.value = lengthValue; |
| return length; |
| } |
| |
| MathMLElement::Length MathMLPresentationElement::parseNamedSpace(const StringView& string) |
| { |
| // Named space values are case-sensitive. |
| int namedSpaceValue; |
| if (string == "veryverythinmathspace") |
| namedSpaceValue = 1; |
| else if (string == "verythinmathspace") |
| namedSpaceValue = 2; |
| else if (string == "thinmathspace") |
| namedSpaceValue = 3; |
| else if (string == "mediummathspace") |
| namedSpaceValue = 4; |
| else if (string == "thickmathspace") |
| namedSpaceValue = 5; |
| else if (string == "verythickmathspace") |
| namedSpaceValue = 6; |
| else if (string == "veryverythickmathspace") |
| namedSpaceValue = 7; |
| else if (string == "negativeveryverythinmathspace") |
| namedSpaceValue = -1; |
| else if (string == "negativeverythinmathspace") |
| namedSpaceValue = -2; |
| else if (string == "negativethinmathspace") |
| namedSpaceValue = -3; |
| else if (string == "negativemediummathspace") |
| namedSpaceValue = -4; |
| else if (string == "negativethickmathspace") |
| namedSpaceValue = -5; |
| else if (string == "negativeverythickmathspace") |
| namedSpaceValue = -6; |
| else if (string == "negativeveryverythickmathspace") |
| namedSpaceValue = -7; |
| else |
| return Length(); |
| |
| Length length; |
| length.type = LengthType::MathUnit; |
| length.value = namedSpaceValue; |
| return length; |
| } |
| |
| MathMLElement::Length MathMLPresentationElement::parseMathMLLength(const String& string) |
| { |
| // The regular expression from the MathML Relax NG schema is as follows: |
| // |
| // pattern = '\s*((-?[0-9]*([0-9]\.?|\.[0-9])[0-9]*(e[mx]|in|cm|mm|p[xtc]|%)?)|(negative)?((very){0,2}thi(n|ck)|medium)mathspace)\s*' |
| // |
| // We do not perform a strict verification of the syntax of whitespaces and number. |
| // Instead, we just use isHTMLSpace and toFloat to parse these parts. |
| |
| // We first skip whitespace from both ends of the string. |
| StringView stringView = stripLeadingAndTrailingWhitespace(string); |
| |
| if (stringView.isEmpty()) |
| return Length(); |
| |
| // We consider the most typical case: a number followed by an optional unit. |
| UChar firstChar = stringView[0]; |
| if (isASCIIDigit(firstChar) || firstChar == '-' || firstChar == '.') |
| return parseNumberAndUnit(stringView); |
| |
| // Otherwise, we try and parse a named space. |
| return parseNamedSpace(stringView); |
| } |
| |
| const MathMLElement::Length& MathMLPresentationElement::cachedMathMLLength(const QualifiedName& name, std::optional<Length>& length) |
| { |
| if (length) |
| return length.value(); |
| length = parseMathMLLength(attributeWithoutSynchronization(name)); |
| return length.value(); |
| } |
| |
| bool MathMLPresentationElement::acceptsDisplayStyleAttribute() |
| { |
| return hasTagName(mtableTag); |
| } |
| |
| std::optional<bool> MathMLPresentationElement::specifiedDisplayStyle() |
| { |
| if (!acceptsDisplayStyleAttribute()) |
| return std::nullopt; |
| const MathMLElement::BooleanValue& specifiedDisplayStyle = cachedBooleanAttribute(displaystyleAttr, m_displayStyle); |
| return toOptionalBool(specifiedDisplayStyle); |
| } |
| |
| MathMLElement::MathVariant MathMLPresentationElement::parseMathVariantAttribute(const AtomicString& attributeValue) |
| { |
| // The mathvariant attribute values is case-sensitive. |
| if (attributeValue == "normal") |
| return MathVariant::Normal; |
| if (attributeValue == "bold") |
| return MathVariant::Bold; |
| if (attributeValue == "italic") |
| return MathVariant::Italic; |
| if (attributeValue == "bold-italic") |
| return MathVariant::BoldItalic; |
| if (attributeValue == "double-struck") |
| return MathVariant::DoubleStruck; |
| if (attributeValue == "bold-fraktur") |
| return MathVariant::BoldFraktur; |
| if (attributeValue == "script") |
| return MathVariant::Script; |
| if (attributeValue == "bold-script") |
| return MathVariant::BoldScript; |
| if (attributeValue == "fraktur") |
| return MathVariant::Fraktur; |
| if (attributeValue == "sans-serif") |
| return MathVariant::SansSerif; |
| if (attributeValue == "bold-sans-serif") |
| return MathVariant::BoldSansSerif; |
| if (attributeValue == "sans-serif-italic") |
| return MathVariant::SansSerifItalic; |
| if (attributeValue == "sans-serif-bold-italic") |
| return MathVariant::SansSerifBoldItalic; |
| if (attributeValue == "monospace") |
| return MathVariant::Monospace; |
| if (attributeValue == "initial") |
| return MathVariant::Initial; |
| if (attributeValue == "tailed") |
| return MathVariant::Tailed; |
| if (attributeValue == "looped") |
| return MathVariant::Looped; |
| if (attributeValue == "stretched") |
| return MathVariant::Stretched; |
| return MathVariant::None; |
| } |
| |
| std::optional<MathMLElement::MathVariant> MathMLPresentationElement::specifiedMathVariant() |
| { |
| if (!acceptsMathVariantAttribute()) |
| return std::nullopt; |
| if (!m_mathVariant) |
| m_mathVariant = parseMathVariantAttribute(attributeWithoutSynchronization(mathvariantAttr)); |
| return m_mathVariant.value() == MathVariant::None ? std::nullopt : m_mathVariant; |
| } |
| |
| void MathMLPresentationElement::parseAttribute(const QualifiedName& name, const AtomicString& value) |
| { |
| bool displayStyleAttribute = name == displaystyleAttr && acceptsDisplayStyleAttribute(); |
| bool mathVariantAttribute = name == mathvariantAttr && acceptsMathVariantAttribute(); |
| if (displayStyleAttribute) |
| m_displayStyle = std::nullopt; |
| if (mathVariantAttribute) |
| m_mathVariant = std::nullopt; |
| if ((displayStyleAttribute || mathVariantAttribute) && renderer()) |
| MathMLStyle::resolveMathMLStyleTree(renderer()); |
| |
| MathMLElement::parseAttribute(name, value); |
| } |
| |
| } |
| |
| #endif // ENABLE(MATHML) |
