gecko-dev/intl/locale/nsLanguageAtomService.cpp

142 строки
3.6 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 "nsILocaleService.h"
#include "nsUnicharUtils.h"
#include "nsIAtom.h"
#include "mozilla/Services.h"
#include "nsServiceManagerUtils.h"
#include "mozilla/dom/EncodingUtils.h"
NS_IMPL_ISUPPORTS(nsLanguageAtomService, nsILanguageAtomService)
nsLanguageAtomService::nsLanguageAtomService()
{
}
nsresult
nsLanguageAtomService::InitLangGroupTable()
{
if (mLangGroups)
return NS_OK;
nsCOMPtr<nsIStringBundleService> bundleService =
mozilla::services::GetStringBundleService();
if (!bundleService)
return NS_ERROR_FAILURE;
return bundleService->CreateBundle("resource://gre/res/langGroups.properties",
getter_AddRefs(mLangGroups));
}
nsIAtom*
nsLanguageAtomService::LookupLanguage(const nsACString &aLanguage,
nsresult *aError)
{
nsAutoCString lowered(aLanguage);
ToLowerCase(lowered);
nsCOMPtr<nsIAtom> lang = do_GetAtom(lowered);
return GetLanguageGroup(lang, aError);
}
already_AddRefed<nsIAtom>
nsLanguageAtomService::LookupCharSet(const nsACString& aCharSet)
{
nsAutoCString group;
mozilla::dom::EncodingUtils::LangGroupForEncoding(aCharSet, group);
return do_GetAtom(group);
}
nsIAtom*
nsLanguageAtomService::GetLocaleLanguage(nsresult *aError)
{
nsresult res = NS_OK;
do {
if (!mLocaleLanguage) {
nsCOMPtr<nsILocaleService> localeService;
localeService = do_GetService(NS_LOCALESERVICE_CONTRACTID);
if (!localeService) {
res = NS_ERROR_FAILURE;
break;
}
nsCOMPtr<nsILocale> locale;
res = localeService->GetApplicationLocale(getter_AddRefs(locale));
if (NS_FAILED(res))
break;
nsAutoString loc;
res = locale->GetCategory(NS_LITERAL_STRING(NSILOCALE_MESSAGE), loc);
if (NS_FAILED(res))
break;
ToLowerCase(loc); // use lowercase for all language atoms
mLocaleLanguage = do_GetAtom(loc);
}
} while (0);
if (aError)
*aError = res;
return mLocaleLanguage;
}
nsIAtom*
nsLanguageAtomService::GetLanguageGroup(nsIAtom *aLanguage,
nsresult *aError)
{
nsIAtom *retVal;
nsresult res = NS_OK;
retVal = mLangToGroup.GetWeak(aLanguage);
if (!retVal) {
if (!mLangGroups) {
if (NS_FAILED(InitLangGroupTable())) {
if (aError) {
*aError = NS_ERROR_FAILURE;
}
return nullptr;
}
}
nsString langStr;
aLanguage->ToString(langStr);
nsXPIDLString langGroupStr;
res = mLangGroups->GetStringFromName(langStr.get(),
getter_Copies(langGroupStr));
if (NS_FAILED(res)) {
int32_t hyphen = langStr.FindChar('-');
if (hyphen >= 0) {
nsAutoString truncated(langStr);
truncated.Truncate(hyphen);
res = mLangGroups->GetStringFromName(truncated.get(),
getter_Copies(langGroupStr));
if (NS_FAILED(res)) {
langGroupStr.AssignLiteral("x-unicode");
}
} else {
langGroupStr.AssignLiteral("x-unicode");
}
}
nsCOMPtr<nsIAtom> langGroup = do_GetAtom(langGroupStr);
// The hashtable will keep an owning reference to the atom
mLangToGroup.Put(aLanguage, langGroup);
retVal = langGroup.get();
}
if (aError) {
*aError = res;
}
return retVal;
}