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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "LocaleService.h"
#include "jsapi.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/Services.h"
#include "nsIObserverService.h"
#include "nsIToolkitChromeRegistry.h"
using namespace mozilla::intl;
NS_IMPL_ISUPPORTS(LocaleService, mozILocaleService)
mozilla::StaticRefPtr<LocaleService> LocaleService::sInstance;
/**
* This function performs the actual language negotiation for the API.
*
* Currently it collects the locale ID used by nsChromeRegistry and
* adds hardcoded "en-US" locale as a fallback.
*/
static void
ReadAppLocales(nsTArray<nsCString>& aRetVal)
{
nsAutoCString uaLangTag;
nsCOMPtr<nsIToolkitChromeRegistry> cr =
mozilla::services::GetToolkitChromeRegistryService();
if (cr) {
cr->GetSelectedLocale(NS_LITERAL_CSTRING("global"), true, uaLangTag);
}
if (!uaLangTag.IsEmpty()) {
aRetVal.AppendElement(uaLangTag);
}
if (!uaLangTag.EqualsLiteral("en-US")) {
aRetVal.AppendElement(NS_LITERAL_CSTRING("en-US"));
}
}
LocaleService*
LocaleService::GetInstance()
{
if (!sInstance) {
sInstance = new LocaleService();
ClearOnShutdown(&sInstance);
}
return sInstance;
}
void
LocaleService::GetAppLocales(nsTArray<nsCString>& aRetVal)
{
if (mAppLocales.IsEmpty()) {
ReadAppLocales(mAppLocales);
}
aRetVal = mAppLocales;
}
void
LocaleService::GetAppLocale(nsACString& aRetVal)
{
if (mAppLocales.IsEmpty()) {
ReadAppLocales(mAppLocales);
}
aRetVal = mAppLocales[0];
}
void
LocaleService::Refresh()
{
nsTArray<nsCString> newLocales;
ReadAppLocales(newLocales);
if (mAppLocales != newLocales) {
mAppLocales = Move(newLocales);
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(nullptr, "intl:app-locales-changed", nullptr);
}
}
}
/**
* mozILocaleService methods
*/
NS_IMETHODIMP
LocaleService::GetAppLocales(JSContext* aCtx, JS::MutableHandleValue aRetVal)
{
if (mAppLocales.IsEmpty()) {
ReadAppLocales(mAppLocales);
}
uint32_t appLocalesNum = mAppLocales.Length();
JS::RootedObject locales(aCtx, JS_NewArrayObject(aCtx, appLocalesNum));
JS::Rooted<JS::Value> value(aCtx);
for (size_t i = 0; i < appLocalesNum; i++) {
const nsCString& loc = mAppLocales[i];
JSString* str = JS_NewStringCopyN(aCtx, loc.get(), loc.Length());
value.setString(str);
JS_DefineElement(aCtx, locales, i, value, JSPROP_ENUMERATE);
}
aRetVal.setObject(*locales);
return NS_OK;
}
NS_IMETHODIMP
LocaleService::GetAppLocale(JSContext* aCtx, nsACString& aRetVal)
{
GetAppLocale(aRetVal);
return NS_OK;
}
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