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/*
* Copyright (C) 2003, 2005, 2006, 2010, 2011, 2016, 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <wtf/Language.h>
#include <CoreFoundation/CoreFoundation.h>
#include <mutex>
#include <unicode/uloc.h>
#include <wtf/Assertions.h>
#include <wtf/Lock.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/RetainPtr.h>
#include <wtf/spi/cf/CFBundleSPI.h>
#include <wtf/text/WTFString.h>
namespace WTF {
static Lock preferredLanguagesMutex;
static Vector<String>& preferredLanguages()
{
static NeverDestroyed<Vector<String>> languages;
return languages;
}
static String httpStyleLanguageCode(CFStringRef language)
{
RetainPtr<CFStringRef> preferredLanguageCode;
// If we can minimize the language list to reduce fingerprinting, we can afford to be more lossless when canonicalizing the locale list.
if (canMinimizeLanguages())
preferredLanguageCode = adoptCF(CFLocaleCreateCanonicalLanguageIdentifierFromString(kCFAllocatorDefault, language));
else {
SInt32 languageCode;
SInt32 regionCode;
SInt32 scriptCode;
CFStringEncoding stringEncoding;
// FIXME: This transformation is very wrong:
// 1. There is no reason why CFBundle localization names would be at all related to language names as used on the Web.
// 2. Script Manager codes cannot represent all languages that are now supported by the platform, so the conversion is lossy.
// 3. This should probably match what is sent by the network layer as Accept-Language, but currently, that's implemented separately.
CFBundleGetLocalizationInfoForLocalization(language, &languageCode, &regionCode, &scriptCode, &stringEncoding);
preferredLanguageCode = adoptCF(CFBundleCopyLocalizationForLocalizationInfo(languageCode, regionCode, scriptCode, stringEncoding));
}
if (!preferredLanguageCode)
preferredLanguageCode = language;
auto mutableLanguageCode = adoptCF(CFStringCreateMutableCopy(kCFAllocatorDefault, 0, preferredLanguageCode.get()));
// Turn a '_' into a '-' if it appears after a 2-letter language code
if (CFStringGetLength(mutableLanguageCode.get()) >= 3 && CFStringGetCharacterAtIndex(mutableLanguageCode.get(), 2) == '_')
CFStringReplace(mutableLanguageCode.get(), CFRangeMake(2, 1), CFSTR("-"));
CFStringLowercase(mutableLanguageCode.get(), nullptr);
return mutableLanguageCode.get();
}
#if PLATFORM(MAC)
static void languagePreferencesDidChange(CFNotificationCenterRef, void*, CFStringRef, const void*, CFDictionaryRef)
{
{
auto locker = holdLock(preferredLanguagesMutex);
preferredLanguages().clear();
}
languageDidChange();
}
#endif
Vector<String> platformUserPreferredLanguages()
{
#if PLATFORM(MAC)
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^ {
CFNotificationCenterAddObserver(CFNotificationCenterGetDistributedCenter(), nullptr, &languagePreferencesDidChange, CFSTR("AppleLanguagePreferencesChangedNotification"), nullptr, CFNotificationSuspensionBehaviorCoalesce);
});
#endif
auto locker = holdLock(preferredLanguagesMutex);
Vector<String>& userPreferredLanguages = preferredLanguages();
if (userPreferredLanguages.isEmpty()) {
RetainPtr<CFArrayRef> languages = adoptCF(CFLocaleCopyPreferredLanguages());
languages = minimizedLanguagesFromLanguages(languages.get());
CFIndex languageCount = CFArrayGetCount(languages.get());
if (!languageCount)
userPreferredLanguages.append("en");
else {
for (CFIndex i = 0; i < languageCount; i++)
userPreferredLanguages.append(httpStyleLanguageCode(static_cast<CFStringRef>(CFArrayGetValueAtIndex(languages.get(), i))));
}
}
Vector<String> userPreferredLanguagesCopy;
userPreferredLanguagesCopy.reserveInitialCapacity(userPreferredLanguages.size());
for (auto& language : userPreferredLanguages)
userPreferredLanguagesCopy.uncheckedAppend(language.isolatedCopy());
return userPreferredLanguagesCopy;
return Vector<String>();
}
} // namespace WTF