react-native/React/Modules/RCTI18nUtil.m

109 lines
3.0 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
+ (instancetype)sharedInstance
{
static RCTI18nUtil *sharedInstance;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [self new];
[sharedInstance makeRTLFlipLeftAndRightStyles: true];
});
return sharedInstance;
}
/**
* Check if the app is currently running on an RTL locale.
* This only happens when the app:
* - is forcing RTL layout, regardless of the active language (for development purpose)
* - allows RTL layout when using RTL locale
*/
- (BOOL)isRTL
{
if ([self isRTLForced]) {
return YES;
}
if ([self isRTLAllowed] && [self isApplicationPreferredLanguageRTL]) {
return YES;
}
return NO;
}
/**
* Should be used very early during app start up
* Before the bridge is initialized
* @return whether the app allows RTL layout, default is true
*/
- (BOOL)isRTLAllowed
{
NSNumber *value = [[NSUserDefaults standardUserDefaults] objectForKey:@"RCTI18nUtil_allowRTL"];
if (value == nil) {
return YES;
}
return [value boolValue];
}
- (void)allowRTL:(BOOL)rtlStatus
{
[[NSUserDefaults standardUserDefaults] setBool:rtlStatus forKey:@"RCTI18nUtil_allowRTL"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
/**
* Could be used to test RTL layout with English
* Used for development and testing purpose
*/
- (BOOL)isRTLForced
{
BOOL rtlStatus = [[NSUserDefaults standardUserDefaults]
boolForKey:@"RCTI18nUtil_forceRTL"];
return rtlStatus;
}
- (void)forceRTL:(BOOL)rtlStatus
{
[[NSUserDefaults standardUserDefaults] setBool:rtlStatus forKey:@"RCTI18nUtil_forceRTL"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
- (BOOL)doesRTLFlipLeftAndRightStyles
{
return [[NSUserDefaults standardUserDefaults] boolForKey:@"RCTI18nUtil_makeRTLFlipLeftAndRightStyles"];
}
- (void)makeRTLFlipLeftAndRightStyles:(BOOL)value
{
[[NSUserDefaults standardUserDefaults] setBool:value forKey:@"RCTI18nUtil_makeRTLFlipLeftAndRightStyles"];
[[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