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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/SVGTests.h"
#include "DOMSVGStringList.h"
#include "nsIContent.h"
#include "nsIContentInlines.h"
#include "mozilla/dom/SVGSwitchElement.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsStyleUtil.h"
#include "mozilla/Preferences.h"
namespace mozilla::dom {
nsStaticAtom* const SVGTests::sStringListNames[2] = {
nsGkAtoms::requiredExtensions,
nsGkAtoms::systemLanguage,
};
SVGTests::SVGTests() {
mStringListAttributes[LANGUAGE].SetIsCommaSeparated(true);
}
already_AddRefed<DOMSVGStringList> SVGTests::RequiredExtensions() {
return DOMSVGStringList::GetDOMWrapper(&mStringListAttributes[EXTENSIONS],
AsSVGElement(), true, EXTENSIONS);
}
already_AddRefed<DOMSVGStringList> SVGTests::SystemLanguage() {
return DOMSVGStringList::GetDOMWrapper(&mStringListAttributes[LANGUAGE],
AsSVGElement(), true, LANGUAGE);
}
bool SVGTests::HasExtension(const nsAString& aExtension) const {
#define SVG_SUPPORTED_EXTENSION(str) \
if (aExtension.EqualsLiteral(str)) return true;
SVG_SUPPORTED_EXTENSION("http://www.w3.org/1999/xhtml")
nsNameSpaceManager* nameSpaceManager = nsNameSpaceManager::GetInstance();
if (AsSVGElement()->IsInChromeDocument() ||
!nameSpaceManager->mMathMLDisabled) {
SVG_SUPPORTED_EXTENSION("http://www.w3.org/1998/Math/MathML")
}
#undef SVG_SUPPORTED_EXTENSION
return false;
}
bool SVGTests::IsConditionalProcessingAttribute(
const nsAtom* aAttribute) const {
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == sStringListNames[i]) {
return true;
}
}
return false;
}
int32_t SVGTests::GetBestLanguagePreferenceRank(
const nsAString& aAcceptLangs) const {
if (!mStringListAttributes[LANGUAGE].IsExplicitlySet()) {
return -2;
}
int32_t lowestRank = -1;
for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
int32_t index = 0;
for (const nsAString& languageToken :
nsCharSeparatedTokenizer(aAcceptLangs, ',').ToRange()) {
bool exactMatch = languageToken.Equals(mStringListAttributes[LANGUAGE][i],
nsCaseInsensitiveStringComparator);
bool prefixOnlyMatch =
!exactMatch && nsStyleUtil::DashMatchCompare(
mStringListAttributes[LANGUAGE][i], languageToken,
nsCaseInsensitiveStringComparator);
if (index == 0 && exactMatch) {
// best possible match
return 0;
}
if ((exactMatch || prefixOnlyMatch) &&
(lowestRank == -1 || 2 * index + prefixOnlyMatch < lowestRank)) {
lowestRank = 2 * index + prefixOnlyMatch;
}
++index;
}
}
return lowestRank;
}
bool SVGTests::PassesConditionalProcessingTestsIgnoringSystemLanguage() const {
// Required Extensions
//
// The requiredExtensions attribute defines a list of required language
// extensions. Language extensions are capabilities within a user agent that
// go beyond the feature set defined in the SVG specification.
// Each extension is identified by a URI reference.
// For now, claim that mozilla's SVG implementation supports XHTML and MathML.
if (mStringListAttributes[EXTENSIONS].IsExplicitlySet()) {
if (mStringListAttributes[EXTENSIONS].IsEmpty()) {
return false;
}
for (uint32_t i = 0; i < mStringListAttributes[EXTENSIONS].Length(); i++) {
if (!HasExtension(mStringListAttributes[EXTENSIONS][i])) {
return false;
}
}
}
return true;
}
bool SVGTests::PassesConditionalProcessingTests() const {
if (!PassesConditionalProcessingTestsIgnoringSystemLanguage()) {
return false;
}
// systemLanguage
//
// Evaluates to "true" if one of the languages indicated by user preferences
// exactly equals one of the languages given in the value of this parameter,
// or if one of the languages indicated by user preferences exactly equals a
// prefix of one of the languages given in the value of this parameter such
// that the first tag character following the prefix is "-".
if (mStringListAttributes[LANGUAGE].IsExplicitlySet()) {
if (mStringListAttributes[LANGUAGE].IsEmpty()) {
return false;
}
// Get our language preferences
nsAutoString acceptLangs;
Preferences::GetLocalizedString("intl.accept_languages", acceptLangs);
if (acceptLangs.IsEmpty()) {
NS_WARNING(
"no default language specified for systemLanguage conditional test");
return false;
}
for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
nsCharSeparatedTokenizer languageTokenizer(acceptLangs, ',');
while (languageTokenizer.hasMoreTokens()) {
if (nsStyleUtil::DashMatchCompare(mStringListAttributes[LANGUAGE][i],
languageTokenizer.nextToken(),
nsCaseInsensitiveStringComparator)) {
return true;
}
}
}
return false;
}
return true;
}
bool SVGTests::ParseConditionalProcessingAttribute(nsAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult) {
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == sStringListNames[i]) {
nsresult rv = mStringListAttributes[i].SetValue(aValue);
if (NS_FAILED(rv)) {
mStringListAttributes[i].Clear();
}
MaybeInvalidate();
return true;
}
}
return false;
}
void SVGTests::UnsetAttr(const nsAtom* aAttribute) {
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == sStringListNames[i]) {
mStringListAttributes[i].Clear();
MaybeInvalidate();
return;
}
}
}
nsStaticAtom* SVGTests::GetAttrName(uint8_t aAttrEnum) const {
return sStringListNames[aAttrEnum];
}
void SVGTests::GetAttrValue(uint8_t aAttrEnum, nsAttrValue& aValue) const {
MOZ_ASSERT(aAttrEnum < ArrayLength(sStringListNames),
"aAttrEnum out of range");
aValue.SetTo(mStringListAttributes[aAttrEnum], nullptr);
}
void SVGTests::MaybeInvalidate() {
nsIContent* parent = AsSVGElement()->GetFlattenedTreeParent();
if (parent &&
parent->NodeInfo()->Equals(nsGkAtoms::svgSwitch, kNameSpaceID_SVG)) {
static_cast<dom::SVGSwitchElement*>(parent)->MaybeInvalidate();
}
}
} // namespace mozilla::dom
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