зеркало из https://github.com/mozilla/gecko-dev.git
117 строки
3.2 KiB
C++
117 строки
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsLanguageAtomService.h"
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#include "nsUConvPropertySearch.h"
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#include "nsUnicharUtils.h"
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#include "nsIAtom.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/intl/OSPreferences.h"
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#include "mozilla/dom/EncodingUtils.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/ServoBindings.h"
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using namespace mozilla;
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using mozilla::intl::OSPreferences;
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static constexpr nsUConvProp kLangGroups[] = {
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#include "langGroups.properties.h"
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};
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// static
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nsLanguageAtomService*
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nsLanguageAtomService::GetService()
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{
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static UniquePtr<nsLanguageAtomService> gLangAtomService;
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if (!gLangAtomService) {
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gLangAtomService = MakeUnique<nsLanguageAtomService>();
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ClearOnShutdown(&gLangAtomService);
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}
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return gLangAtomService.get();
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}
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nsIAtom*
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nsLanguageAtomService::LookupLanguage(const nsACString &aLanguage)
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{
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nsAutoCString lowered(aLanguage);
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ToLowerCase(lowered);
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nsCOMPtr<nsIAtom> lang = NS_Atomize(lowered);
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return GetLanguageGroup(lang);
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}
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already_AddRefed<nsIAtom>
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nsLanguageAtomService::LookupCharSet(const nsACString& aCharSet)
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{
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nsAutoCString group;
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dom::EncodingUtils::LangGroupForEncoding(aCharSet, group);
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return NS_Atomize(group);
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}
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nsIAtom*
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nsLanguageAtomService::GetLocaleLanguage()
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{
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do {
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if (!mLocaleLanguage) {
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nsAutoCString locale;
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OSPreferences::GetInstance()->GetSystemLocale(locale);
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ToLowerCase(locale); // use lowercase for all language atoms
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mLocaleLanguage = NS_Atomize(locale);
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}
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} while (0);
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return mLocaleLanguage;
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}
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nsIAtom*
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nsLanguageAtomService::GetLanguageGroup(nsIAtom *aLanguage, bool* aNeedsToCache)
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{
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nsIAtom *retVal = mLangToGroup.GetWeak(aLanguage);
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if (!retVal) {
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if (aNeedsToCache) {
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*aNeedsToCache = true;
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return nullptr;
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}
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nsCOMPtr<nsIAtom> uncached = GetUncachedLanguageGroup(aLanguage);
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retVal = uncached.get();
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AssertIsMainThreadOrServoLangFontPrefsCacheLocked();
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// The hashtable will keep an owning reference to the atom
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mLangToGroup.Put(aLanguage, uncached);
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}
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return retVal;
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}
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already_AddRefed<nsIAtom>
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nsLanguageAtomService::GetUncachedLanguageGroup(nsIAtom* aLanguage) const
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{
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nsAutoCString langStr;
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aLanguage->ToUTF8String(langStr);
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nsAutoCString langGroupStr;
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nsresult res =
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nsUConvPropertySearch::SearchPropertyValue(kLangGroups,
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ArrayLength(kLangGroups),
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langStr, langGroupStr);
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while (NS_FAILED(res)) {
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int32_t hyphen = langStr.RFindChar('-');
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if (hyphen <= 0) {
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langGroupStr.AssignLiteral("x-unicode");
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break;
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}
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langStr.Truncate(hyphen);
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res = nsUConvPropertySearch::SearchPropertyValue(kLangGroups,
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ArrayLength(kLangGroups),
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langStr, langGroupStr);
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}
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nsCOMPtr<nsIAtom> langGroup = NS_Atomize(langGroupStr);
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return langGroup.forget();
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}
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