/* * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis * Copyright (C) 2015-2021 Apple Inc. All right reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public License * along with this library; see the file COPYING.LIB. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. */ #include "config.h" #include "SVGTests.h" #include "DOMImplementation.h" #include "HTMLNames.h" #include "SVGElement.h" #include "SVGNames.h" #include "SVGStringList.h" #include #include #if ENABLE(MATHML) #include "MathMLNames.h" #endif namespace WebCore { constexpr ComparableLettersLiteral supportedSVGFeatureArray[] = { "http://www.w3.org/tr/svg11/feature#animation", "http://www.w3.org/tr/svg11/feature#basegraphicsattribute", "http://www.w3.org/tr/svg11/feature#basicclip", "http://www.w3.org/tr/svg11/feature#basicfilter", "http://www.w3.org/tr/svg11/feature#basicfont", "http://www.w3.org/tr/svg11/feature#basicpaintattribute", "http://www.w3.org/tr/svg11/feature#basicstructure", "http://www.w3.org/tr/svg11/feature#basictext", "http://www.w3.org/tr/svg11/feature#clip", "http://www.w3.org/tr/svg11/feature#conditionalprocessing", "http://www.w3.org/tr/svg11/feature#containerattribute", "http://www.w3.org/tr/svg11/feature#coreattribute", "http://www.w3.org/tr/svg11/feature#cursor", "http://www.w3.org/tr/svg11/feature#documenteventsattribute", "http://www.w3.org/tr/svg11/feature#extensibility", "http://www.w3.org/tr/svg11/feature#externalresourcesrequired", "http://www.w3.org/tr/svg11/feature#filter", "http://www.w3.org/tr/svg11/feature#font", "http://www.w3.org/tr/svg11/feature#gradient", "http://www.w3.org/tr/svg11/feature#graphicaleventsattribute", "http://www.w3.org/tr/svg11/feature#graphicsattribute", "http://www.w3.org/tr/svg11/feature#hyperlinking", "http://www.w3.org/tr/svg11/feature#image", "http://www.w3.org/tr/svg11/feature#marker", "http://www.w3.org/tr/svg11/feature#mask", "http://www.w3.org/tr/svg11/feature#opacityattribute", "http://www.w3.org/tr/svg11/feature#paintattribute", "http://www.w3.org/tr/svg11/feature#pattern", "http://www.w3.org/tr/svg11/feature#script", "http://www.w3.org/tr/svg11/feature#shape", "http://www.w3.org/tr/svg11/feature#structure", "http://www.w3.org/tr/svg11/feature#style", "http://www.w3.org/tr/svg11/feature#svg", "http://www.w3.org/tr/svg11/feature#svg-animation", "http://www.w3.org/tr/svg11/feature#svg-static", "http://www.w3.org/tr/svg11/feature#svgdom", "http://www.w3.org/tr/svg11/feature#svgdom-animation", "http://www.w3.org/tr/svg11/feature#svgdom-static", "http://www.w3.org/tr/svg11/feature#text", "http://www.w3.org/tr/svg11/feature#view", "http://www.w3.org/tr/svg11/feature#viewportattribute", "http://www.w3.org/tr/svg11/feature#xlinkattribute", "org.w3c.dom", "org.w3c.dom.svg", "org.w3c.dom.svg.static", "org.w3c.svg", "org.w3c.svg.static", }; constexpr SortedArraySet supportedSVGFeatureSet { supportedSVGFeatureArray }; SVGTests::SVGTests(SVGElement* contextElement) : m_contextElement(*contextElement) , m_requiredFeatures(SVGStringList::create(contextElement)) , m_requiredExtensions(SVGStringList::create(contextElement)) , m_systemLanguage(SVGStringList::create(contextElement)) { static std::once_flag onceFlag; std::call_once(onceFlag, [] { PropertyRegistry::registerProperty(); PropertyRegistry::registerProperty(); PropertyRegistry::registerProperty(); }); } bool SVGTests::hasExtension(const String& extension) { // We recognize XHTML and MathML, as implemented in Gecko and suggested in the SVG Tiny recommendation (http://www.w3.org/TR/SVG11/struct.html#RequiredExtensionsAttribute). #if ENABLE(MATHML) if (extension == MathMLNames::mathmlNamespaceURI) return true; #endif return extension == HTMLNames::xhtmlNamespaceURI; } bool SVGTests::isValid() const { for (auto& feature : m_requiredFeatures->items()) { if (feature.isEmpty() || !supportedSVGFeatureSet.contains(feature)) return false; } String defaultLanguage = WTF::defaultLanguage(); auto genericDefaultLanguage = StringView(defaultLanguage).left(2); for (auto& language : m_systemLanguage->items()) { if (language != genericDefaultLanguage) return false; } for (auto& extension : m_requiredExtensions->items()) { if (!hasExtension(extension)) return false; } return true; } void SVGTests::parseAttribute(const QualifiedName& attributeName, const AtomString& value) { if (attributeName == SVGNames::requiredFeaturesAttr) m_requiredFeatures->reset(value); if (attributeName == SVGNames::requiredExtensionsAttr) m_requiredExtensions->reset(value); if (attributeName == SVGNames::systemLanguageAttr) m_systemLanguage->reset(value); } void SVGTests::svgAttributeChanged(const QualifiedName& attrName) { if (!PropertyRegistry::isKnownAttribute(attrName)) return; if (!m_contextElement.isConnected()) return; m_contextElement.invalidateStyleAndRenderersForSubtree(); } void SVGTests::addSupportedAttributes(MemoryCompactLookupOnlyRobinHoodHashSet& supportedAttributes) { supportedAttributes.add(SVGNames::requiredFeaturesAttr); supportedAttributes.add(SVGNames::requiredExtensionsAttr); supportedAttributes.add(SVGNames::systemLanguageAttr); } bool SVGTests::hasFeatureForLegacyBindings(const String& feature, const String& version) { // FIXME: This function is here only to be exposed in the Objective-C and GObject bindings for both Node and DOMImplementation. // It's likely that we can just remove this and instead have the bindings return true unconditionally. // This is what the DOMImplementation function now does in JavaScript as is now suggested in the DOM specification. // The behavior implemented below is quirky, but preserves what WebKit has done for at least the last few years. bool hasSVG10FeaturePrefix = startsWithLettersIgnoringASCIICase(feature, "org.w3c.dom.svg"_s) || startsWithLettersIgnoringASCIICase(feature, "org.w3c.svg"_s); bool hasSVG11FeaturePrefix = startsWithLettersIgnoringASCIICase(feature, "http://www.w3.org/tr/svg"_s); // We don't even try to handle feature names that don't look like the SVG ones, so just return true for all of those. if (!(hasSVG10FeaturePrefix || hasSVG11FeaturePrefix)) return true; // If the version number matches the style of the feature name, then use the set to see if the feature is supported. if (version.isEmpty() || (hasSVG10FeaturePrefix && version == "1.0"_s) || (hasSVG11FeaturePrefix && version == "1.1"_s)) return supportedSVGFeatureSet.contains(feature); return false; } }