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