react-native/React/Modules/RCTI18nUtil.m
Mengjue Wang fa6022dc1a Connect the OS language with isRTL
Summary: Create isDeviceLanguageRTL function to connect the OS language with isRTL. Now even if a new app could support RTL language, without setting forceRTL at JS side it won't directly change into RTL layout.

Reviewed By: fkgozali

Differential Revision: D3473109

fbshipit-source-id: ac1410c910e980d44750bb88cad7615febb9e076
2016-06-23 18:58:30 -07:00

53 lines
1.3 KiB
Objective-C

/**
* 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;
}
- (BOOL)isRTL
{
if ([self forceRTL] && [self isDevicePreferredLanguageRTL]) {
return YES;
}
return NO;
}
- (BOOL)forceRTL
{
BOOL rtlStatus = [[NSUserDefaults standardUserDefaults]
boolForKey:@"RCTI18nUtil_forceRTL"];
return rtlStatus;
}
- (void)setForceRTL:(BOOL)rtlStatus
{
[[NSUserDefaults standardUserDefaults] setBool:rtlStatus forKey:@"RCTI18nUtil_forceRTL"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
- (BOOL)isDevicePreferredLanguageRTL
{
NSLocaleLanguageDirection direction = [NSLocale characterDirectionForLanguage:[[NSLocale preferredLanguages] objectAtIndex:0]];
return direction == NSLocaleLanguageDirectionRightToLeft;
}
@end