gecko-dev/intl/locale/nsLanguageAtomService.cpp

117 строки
3.2 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsLanguageAtomService.h"
#include "nsUConvPropertySearch.h"
#include "nsUnicharUtils.h"
#include "nsIAtom.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/intl/OSPreferences.h"
#include "mozilla/dom/EncodingUtils.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/ServoBindings.h"
using namespace mozilla;
using mozilla::intl::OSPreferences;
static constexpr nsUConvProp kLangGroups[] = {
#include "langGroups.properties.h"
};
// static
nsLanguageAtomService*
nsLanguageAtomService::GetService()
{
static UniquePtr<nsLanguageAtomService> gLangAtomService;
if (!gLangAtomService) {
gLangAtomService = MakeUnique<nsLanguageAtomService>();
ClearOnShutdown(&gLangAtomService);
}
return gLangAtomService.get();
}
nsIAtom*
nsLanguageAtomService::LookupLanguage(const nsACString &aLanguage)
{
nsAutoCString lowered(aLanguage);
ToLowerCase(lowered);
nsCOMPtr<nsIAtom> lang = NS_Atomize(lowered);
return GetLanguageGroup(lang);
}
already_AddRefed<nsIAtom>
nsLanguageAtomService::LookupCharSet(const nsACString& aCharSet)
{
nsAutoCString group;
dom::EncodingUtils::LangGroupForEncoding(aCharSet, group);
return NS_Atomize(group);
}
nsIAtom*
nsLanguageAtomService::GetLocaleLanguage()
{
do {
if (!mLocaleLanguage) {
nsAutoCString locale;
OSPreferences::GetInstance()->GetSystemLocale(locale);
ToLowerCase(locale); // use lowercase for all language atoms
mLocaleLanguage = NS_Atomize(locale);
}
} while (0);
return mLocaleLanguage;
}
nsIAtom*
nsLanguageAtomService::GetLanguageGroup(nsIAtom *aLanguage, bool* aNeedsToCache)
{
nsIAtom *retVal = mLangToGroup.GetWeak(aLanguage);
if (!retVal) {
if (aNeedsToCache) {
*aNeedsToCache = true;
return nullptr;
}
nsCOMPtr<nsIAtom> uncached = GetUncachedLanguageGroup(aLanguage);
retVal = uncached.get();
AssertIsMainThreadOrServoLangFontPrefsCacheLocked();
// The hashtable will keep an owning reference to the atom
mLangToGroup.Put(aLanguage, uncached);
}
return retVal;
}
already_AddRefed<nsIAtom>
nsLanguageAtomService::GetUncachedLanguageGroup(nsIAtom* aLanguage) const
{
nsAutoCString langStr;
aLanguage->ToUTF8String(langStr);
nsAutoCString langGroupStr;
nsresult res =
nsUConvPropertySearch::SearchPropertyValue(kLangGroups,
ArrayLength(kLangGroups),
langStr, langGroupStr);
while (NS_FAILED(res)) {
int32_t hyphen = langStr.RFindChar('-');
if (hyphen <= 0) {
langGroupStr.AssignLiteral("x-unicode");
break;
}
langStr.Truncate(hyphen);
res = nsUConvPropertySearch::SearchPropertyValue(kLangGroups,
ArrayLength(kLangGroups),
langStr, langGroupStr);
}
nsCOMPtr<nsIAtom> langGroup = NS_Atomize(langGroupStr);
return langGroup.forget();
}