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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>
*
* 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 "third_party/blink/renderer/core/svg/svg_tests.h"
#include "third_party/blink/renderer/core/mathml_names.h"
#include "third_party/blink/renderer/core/page/chrome_client.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/core/svg/svg_element.h"
#include "third_party/blink/renderer/core/svg/svg_static_string_list.h"
#include "third_party/blink/renderer/core/svg_names.h"
#include "third_party/blink/renderer/platform/language.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
namespace blink {
SVGTests::SVGTests(SVGElement* context_element)
: required_extensions_(
SVGStaticStringList::Create<' '>(context_element,
svg_names::kRequiredExtensionsAttr)),
system_language_(
SVGStaticStringList::Create<','>(context_element,
svg_names::kSystemLanguageAttr)) {
DCHECK(context_element);
context_element->AddToPropertyMap(required_extensions_);
context_element->AddToPropertyMap(system_language_);
}
void SVGTests::Trace(Visitor* visitor) const {
visitor->Trace(required_extensions_);
visitor->Trace(system_language_);
}
SVGStringListTearOff* SVGTests::requiredExtensions() {
return required_extensions_->TearOff();
}
SVGStringListTearOff* SVGTests::systemLanguage() {
return system_language_->TearOff();
}
static bool IsLangTagPrefix(const String& lang_tag, const String& language) {
if (!lang_tag.StartsWithIgnoringASCIICase(language))
return false;
return lang_tag.length() == language.length() ||
lang_tag[language.length()] == '-';
}
static bool MatchLanguageList(const String& lang_tag,
const Vector<String>& languages) {
for (const auto& value : languages) {
if (IsLangTagPrefix(lang_tag, value))
return true;
}
return false;
}
bool SVGTests::IsValid() const {
if (system_language_->IsSpecified()) {
bool match_found = false;
Vector<String> languages;
system_language_->ContextElement()
->GetDocument()
.GetPage()
->GetChromeClient()
.AcceptLanguages()
.Split(',', languages);
for (const auto& lang_tag : system_language_->Value()->Values()) {
if (MatchLanguageList(lang_tag, languages)) {
match_found = true;
break;
}
}
if (!match_found)
return false;
}
if (required_extensions_->IsSpecified()) {
const Vector<String>& extensions = required_extensions_->Value()->Values();
// 'If a null string or empty string value is given to attribute
// 'requiredExtensions', the attribute evaluates to "false".'
if (extensions.IsEmpty())
return false;
for (const auto& extension : extensions) {
if (extension != html_names::xhtmlNamespaceURI &&
(!RuntimeEnabledFeatures::MathMLCoreEnabled() ||
extension != mathml_names::kNamespaceURI))
return false;
}
}
return true;
}
bool SVGTests::IsKnownAttribute(const QualifiedName& attr_name) {
return attr_name == svg_names::kRequiredExtensionsAttr ||
attr_name == svg_names::kSystemLanguageAttr;
}
} // namespace blink
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