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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) 2015-2018 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 <wtf/Language.h>
#include <wtf/NeverDestroyed.h>
#if ENABLE(MATHML)
#include "MathMLNames.h"
#endif
namespace WebCore {
using namespace SVGNames;
static const HashSet<String, ASCIICaseInsensitiveHash>& supportedSVGFeatures()
{
static NeverDestroyed<HashSet<String, ASCIICaseInsensitiveHash>> features = [] {
static const char* const features10[] = {
#if ENABLE(SVG_FONTS)
"dom",
"dom.svg",
"dom.svg.static",
"svg",
"svg.static",
#endif
};
static const char* const features11[] = {
"animation",
"basegraphicsattribute",
"basicclip",
"basicfilter",
"basicpaintattribute",
"basicstructure",
"basictext",
"clip",
"conditionalprocessing",
"containerattribute",
"coreattribute",
"cursor",
"documenteventsattribute",
"extensibility",
"externalresourcesrequired",
"filter",
"gradient",
"graphicaleventsattribute",
"graphicsattribute",
"hyperlinking",
"image",
"marker",
"mask",
"opacityattribute",
"paintattribute",
"pattern",
"script",
"shape",
"structure",
"style",
"svg-animation",
"svgdom-animation",
"text",
"view",
"viewportattribute",
"xlinkattribute",
#if ENABLE(SVG_FONTS)
"basicfont",
"font",
"svg",
"svg-static",
"svgdom",
"svgdom-static",
#endif
};
HashSet<String, ASCIICaseInsensitiveHash> set;
for (auto& feature : features10)
set.add(makeString("org.w3c.", feature));
for (auto& feature : features11)
set.add(makeString("http://www.w3.org/tr/svg11/feature#", feature));
return set;
}();
return features;
}
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<SVGNames::requiredFeaturesAttr, &SVGTests::m_requiredFeatures>();
PropertyRegistry::registerProperty<SVGNames::requiredExtensionsAttr, &SVGTests::m_requiredExtensions>();
PropertyRegistry::registerProperty<SVGNames::systemLanguageAttr, &SVGTests::m_systemLanguage>();
});
}
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() || !supportedSVGFeatures().contains(feature))
return false;
}
for (auto& language : m_systemLanguage->items()) {
if (language != defaultLanguage().substring(0, 2))
return false;
}
for (auto& extension : m_requiredExtensions->items()) {
if (!hasExtension(extension))
return false;
}
return true;
}
void SVGTests::parseAttribute(const QualifiedName& attributeName, const AtomicString& value)
{
if (attributeName == requiredFeaturesAttr)
m_requiredFeatures->reset(value);
if (attributeName == requiredExtensionsAttr)
m_requiredExtensions->reset(value);
if (attributeName == 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(HashSet<QualifiedName>& supportedAttributes)
{
supportedAttributes.add(requiredFeaturesAttr);
supportedAttributes.add(requiredExtensionsAttr);
supportedAttributes.add(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") || startsWithLettersIgnoringASCIICase(feature, "org.w3c.svg");
bool hasSVG11FeaturePrefix = startsWithLettersIgnoringASCIICase(feature, "http://www.w3.org/tr/svg");
// 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") || (hasSVG11FeaturePrefix && version == "1.1"))
return supportedSVGFeatures().contains(feature);
return false;
}
}