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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 "nsSVGFeatures.h"
#include "mozilla/dom/SVGSwitchElement.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsStyleUtil.h"
#include "mozilla/Preferences.h"
namespace mozilla {
namespace dom {
nsIAtom** SVGTests::sStringListNames[3] =
{
&nsGkAtoms::requiredFeatures,
&nsGkAtoms::requiredExtensions,
&nsGkAtoms::systemLanguage,
};
SVGTests::SVGTests()
{
mStringListAttributes[LANGUAGE].SetIsCommaSeparated(true);
}
already_AddRefed<DOMSVGStringList>
SVGTests::RequiredFeatures()
{
nsCOMPtr<nsIDOMSVGElement> elem = do_QueryInterface(this);
nsSVGElement* element = static_cast<nsSVGElement*>(elem.get());
return DOMSVGStringList::GetDOMWrapper(
&mStringListAttributes[FEATURES], element, true, FEATURES);
}
already_AddRefed<DOMSVGStringList>
SVGTests::RequiredExtensions()
{
nsCOMPtr<nsIDOMSVGElement> elem = do_QueryInterface(this);
nsSVGElement* element = static_cast<nsSVGElement*>(elem.get());
return DOMSVGStringList::GetDOMWrapper(
&mStringListAttributes[EXTENSIONS], element, true, EXTENSIONS);
}
already_AddRefed<DOMSVGStringList>
SVGTests::SystemLanguage()
{
nsCOMPtr<nsIDOMSVGElement> elem = do_QueryInterface(this);
nsSVGElement* element = static_cast<nsSVGElement*>(elem.get());
return DOMSVGStringList::GetDOMWrapper(
&mStringListAttributes[LANGUAGE], element, true, LANGUAGE);
}
bool
SVGTests::HasExtension(const nsAString& aExtension)
{
return nsSVGFeatures::HasExtension(aExtension, IsInChromeDoc());
}
bool
SVGTests::IsConditionalProcessingAttribute(const nsIAtom* aAttribute) const
{
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == *sStringListNames[i]) {
return true;
}
}
return false;
}
int32_t
SVGTests::GetBestLanguagePreferenceRank(const nsSubstring& aAcceptLangs) const
{
const nsDefaultStringComparator defaultComparator;
if (!mStringListAttributes[LANGUAGE].IsExplicitlySet()) {
return -2;
}
int32_t lowestRank = -1;
for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
nsCharSeparatedTokenizer languageTokenizer(aAcceptLangs, ',');
int32_t index = 0;
while (languageTokenizer.hasMoreTokens()) {
const nsSubstring &languageToken = languageTokenizer.nextToken();
bool exactMatch = (languageToken == mStringListAttributes[LANGUAGE][i]);
bool prefixOnlyMatch =
!exactMatch &&
nsStyleUtil::DashMatchCompare(mStringListAttributes[LANGUAGE][i],
languageTokenizer.nextToken(),
defaultComparator);
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;
}
const nsString * const SVGTests::kIgnoreSystemLanguage = (nsString *) 0x01;
bool
SVGTests::PassesConditionalProcessingTests(const nsString *aAcceptLangs) 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 (!nsSVGFeatures::HasExtension(mStringListAttributes[EXTENSIONS][i], IsInChromeDoc())) {
return false;
}
}
}
if (aAcceptLangs == kIgnoreSystemLanguage) {
return true;
}
// 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
const nsAutoString acceptLangs(aAcceptLangs ? *aAcceptLangs :
Preferences::GetLocalizedString("intl.accept_languages"));
if (acceptLangs.IsEmpty()) {
NS_WARNING("no default language specified for systemLanguage conditional test");
return false;
}
const nsDefaultStringComparator defaultComparator;
for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
nsCharSeparatedTokenizer languageTokenizer(acceptLangs, ',');
while (languageTokenizer.hasMoreTokens()) {
if (nsStyleUtil::DashMatchCompare(mStringListAttributes[LANGUAGE][i],
languageTokenizer.nextToken(),
defaultComparator)) {
return true;
}
}
}
return false;
}
return true;
}
bool
SVGTests::ParseConditionalProcessingAttribute(nsIAtom* 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 nsIAtom* aAttribute)
{
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == *sStringListNames[i]) {
mStringListAttributes[i].Clear();
MaybeInvalidate();
return;
}
}
}
nsIAtom*
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()
{
nsCOMPtr<nsIDOMSVGElement> elem = do_QueryInterface(this);
nsSVGElement* element = static_cast<nsSVGElement*>(elem.get());
nsIContent* parent = element->GetFlattenedTreeParent();
if (parent &&
parent->NodeInfo()->Equals(nsGkAtoms::svgSwitch, kNameSpaceID_SVG)) {
static_cast<dom::SVGSwitchElement*>(parent)->MaybeInvalidate();
}
}
} // namespace dom
} // namespace mozilla
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