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/* -*- 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 */
#include "OSPreferences.h"
#include "mozilla/Preferences.h"
#include "mozilla/java/GeckoAppShellWrappers.h"
using namespace mozilla::intl;
OSPreferences::OSPreferences() {}
bool OSPreferences::ReadSystemLocales(nsTArray<nsCString>& aLocaleList) {
if (!mozilla::jni::IsAvailable()) {
return false;
// XXX: Notice, this value may be empty on an early read. In that case
// we won't add anything to the return list so that it doesn't get
// cached in mSystemLocales.
auto locales = java::GeckoAppShell::GetDefaultLocales();
if (locales) {
for (size_t i = 0; i < locales->Length(); i++) {
jni::String::LocalRef locale = locales->GetElement(i);
return true;
return false;
bool OSPreferences::ReadRegionalPrefsLocales(nsTArray<nsCString>& aLocaleList) {
// For now we're just taking System Locales since we don't know of any better
// API for regional prefs.
return ReadSystemLocales(aLocaleList);
* Similar to Gtk, Android does not provide a way to customize or format
* date/time patterns, so we're reusing ICU data here, but we do modify it
* according to the Android DateFormat is24HourFormat setting.
bool OSPreferences::ReadDateTimePattern(DateTimeFormatStyle aDateStyle,
DateTimeFormatStyle aTimeStyle,
const nsACString& aLocale,
nsACString& aRetVal) {
if (!mozilla::jni::IsAvailable()) {
return false;
nsAutoCString skeleton;
if (!GetDateTimeSkeletonForStyle(aDateStyle, aTimeStyle, aLocale, skeleton)) {
return false;
// Customize the skeleton if necessary to reflect user's 12/24hr pref
OverrideSkeletonHourCycle(java::GeckoAppShell::GetIs24HourFormat(), skeleton);
if (!GetPatternForSkeleton(skeleton, aLocale, aRetVal)) {
return false;
return true;
void OSPreferences::RemoveObservers() {}