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/*
* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* 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 "NodeName.h"
#include "SVGElement.h"
#include "SVGNames.h"
#include "SVGStringList.h"
#include <wtf/Language.h>
#include <wtf/SortedArrayMap.h>
#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 };
SVGConditionalProcessingAttributes::SVGConditionalProcessingAttributes(SVGElement& 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, [] {
SVGTests::PropertyRegistry::registerConditionalProcessingAttributeProperty<SVGNames::requiredFeaturesAttr, &SVGConditionalProcessingAttributes::m_requiredFeatures>();
SVGTests::PropertyRegistry::registerConditionalProcessingAttributeProperty<SVGNames::requiredExtensionsAttr, &SVGConditionalProcessingAttributes::m_requiredExtensions>();
SVGTests::PropertyRegistry::registerConditionalProcessingAttributeProperty<SVGNames::systemLanguageAttr, &SVGConditionalProcessingAttributes::m_systemLanguage>();
});
}
SVGTests::SVGTests(SVGElement* contextElement)
: m_contextElement(*contextElement)
{
}
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
{
auto attributes = conditionalProcessingAttributesIfExists();
if (!attributes)
return true;
for (auto& feature : attributes->requiredFeatures().items()) {
if (feature.isEmpty() || !supportedSVGFeatureSet.contains(feature))
return false;
}
String defaultLanguage = WTF::defaultLanguage();
auto genericDefaultLanguage = StringView(defaultLanguage).left(2);
for (auto& language : attributes->systemLanguage().items()) {
if (language != genericDefaultLanguage)
return false;
}
for (auto& extension : attributes->requiredExtensions().items()) {
if (!hasExtension(extension))
return false;
}
return true;
}
void SVGTests::parseAttribute(const QualifiedName& attributeName, const AtomString& value)
{
switch (attributeName.nodeName()) {
case AttributeNames::requiredFeaturesAttr:
requiredFeatures().reset(value);
break;
case AttributeNames::requiredExtensionsAttr:
requiredExtensions().reset(value);
break;
case AttributeNames::systemLanguageAttr:
systemLanguage().reset(value);
break;
default:
break;
}
}
void SVGTests::svgAttributeChanged(const QualifiedName& attrName)
{
if (!PropertyRegistry::isKnownAttribute(attrName))
return;
if (!m_contextElement.isConnected())
return;
m_contextElement.invalidateStyleAndRenderersForSubtree();
}
void SVGTests::addSupportedAttributes(MemoryCompactLookupOnlyRobinHoodHashSet<QualifiedName>& 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;
}
SVGConditionalProcessingAttributes& SVGTests::conditionalProcessingAttributes()
{
return m_contextElement.conditionalProcessingAttributes();
}
SVGConditionalProcessingAttributes* SVGTests::conditionalProcessingAttributesIfExists() const
{
return m_contextElement.conditionalProcessingAttributesIfExists();
}
}
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