106 lines
2.7 KiB
Mathematica
106 lines
2.7 KiB
Mathematica
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/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTI18nUtil.h"
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#import <UIKit/UIKit.h>
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@implementation RCTI18nUtil
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+ (instancetype)sharedInstance
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{
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static RCTI18nUtil *sharedInstance;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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sharedInstance = [self new];
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[sharedInstance swapLeftAndRightInRTL:true];
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});
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return sharedInstance;
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}
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/**
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* Check if the app is currently running on an RTL locale.
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* This only happens when the app:
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* - is forcing RTL layout, regardless of the active language (for development purpose)
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* - allows RTL layout when using RTL locale
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*/
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- (BOOL)isRTL
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{
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if ([self isRTLForced]) {
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return YES;
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}
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if ([self isRTLAllowed] && [self isApplicationPreferredLanguageRTL]) {
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return YES;
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}
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return NO;
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}
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/**
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* Should be used very early during app start up
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* Before the bridge is initialized
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* @return whether the app allows RTL layout, default is true
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*/
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- (BOOL)isRTLAllowed
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{
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NSNumber *value = [[NSUserDefaults standardUserDefaults] objectForKey:@"RCTI18nUtil_allowRTL"];
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if (value == nil) {
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return YES;
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}
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return [value boolValue];
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}
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- (void)allowRTL:(BOOL)rtlStatus
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{
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[[NSUserDefaults standardUserDefaults] setBool:rtlStatus forKey:@"RCTI18nUtil_allowRTL"];
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[[NSUserDefaults standardUserDefaults] synchronize];
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}
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/**
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* Could be used to test RTL layout with English
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* Used for development and testing purpose
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*/
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- (BOOL)isRTLForced
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{
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BOOL rtlStatus = [[NSUserDefaults standardUserDefaults] boolForKey:@"RCTI18nUtil_forceRTL"];
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return rtlStatus;
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}
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- (void)forceRTL:(BOOL)rtlStatus
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{
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[[NSUserDefaults standardUserDefaults] setBool:rtlStatus forKey:@"RCTI18nUtil_forceRTL"];
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[[NSUserDefaults standardUserDefaults] synchronize];
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}
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- (BOOL)doLeftAndRightSwapInRTL
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{
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return [[NSUserDefaults standardUserDefaults] boolForKey:@"RCTI18nUtil_makeRTLFlipLeftAndRightStyles"];
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}
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- (void)swapLeftAndRightInRTL:(BOOL)value
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{
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[[NSUserDefaults standardUserDefaults] setBool:value forKey:@"RCTI18nUtil_makeRTLFlipLeftAndRightStyles"];
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[[NSUserDefaults standardUserDefaults] synchronize];
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}
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// Check if the current device language is RTL
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- (BOOL)isDevicePreferredLanguageRTL
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{
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NSLocaleLanguageDirection direction =
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[NSLocale characterDirectionForLanguage:[[NSLocale preferredLanguages] objectAtIndex:0]];
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return direction == NSLocaleLanguageDirectionRightToLeft;
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}
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// Check if the current application language is RTL
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- (BOOL)isApplicationPreferredLanguageRTL
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{
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NSWritingDirection direction = [NSParagraphStyle defaultWritingDirectionForLanguage:nil];
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return direction == NSWritingDirectionRightToLeft;
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}
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@end
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