react-native/React/Modules/RCTI18nUtil.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import <Foundation/Foundation.h>
#import "RCTI18nUtil.h"
@implementation RCTI18nUtil
+ (id)sharedInstance {
static RCTI18nUtil *sharedRCTI18nUtilInstance = nil;
@synchronized(self) {
if (sharedRCTI18nUtilInstance == nil)
sharedRCTI18nUtilInstance = [self new];
}
return sharedRCTI18nUtilInstance;
}
// If current using language is RTL language and meanwhile set allowRTL on the JS side,
// the RN app will automatically have a RTL layout.
- (BOOL)isRTL
{
if ([self allowRTL] && [self isApplicationPreferredLanguageRTL]) {
return YES;
}
return NO;
}
- (BOOL)allowRTL
{
BOOL rtlStatus = [[NSUserDefaults standardUserDefaults]
boolForKey:@"RCTI18nUtil_allowRTL"];
return rtlStatus;
}
- (void)setAllowRTL:(BOOL)rtlStatus
{
[[NSUserDefaults standardUserDefaults] setBool:rtlStatus forKey:@"RCTI18nUtil_allowRTL"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
// Check if the current device language is RTL
- (BOOL)isDevicePreferredLanguageRTL
{
NSLocaleLanguageDirection direction = [NSLocale characterDirectionForLanguage:[[NSLocale preferredLanguages] objectAtIndex:0]];
return direction == NSLocaleLanguageDirectionRightToLeft;
}
// Check if the current application language is RTL
- (BOOL)isApplicationPreferredLanguageRTL
{
NSString *preferredAppLanguage = [[[NSBundle mainBundle] preferredLocalizations] objectAtIndex:0];
NSLocaleLanguageDirection direction = [NSLocale characterDirectionForLanguage:preferredAppLanguage];
return direction == NSLocaleLanguageDirectionRightToLeft;
}
@end