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103 lines
3.5 KiB
Objective-C
103 lines
3.5 KiB
Objective-C
/*
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Copyright 2017 Vector Creations Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "NSBundle+MXKLanguage.h"
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#import <objc/runtime.h>
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static const char _bundle = 0;
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static const char _fallbackBundle = 0;
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static const char _language = 0;
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static const char _fallbackLanguage = 0;
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@interface MXKLanguageBundle : NSBundle
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@end
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@implementation MXKLanguageBundle
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- (NSString*)localizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName
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{
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NSBundle* bundle = objc_getAssociatedObject(self, &_bundle);
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// Check if the translation is available in the selected or default language.
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// Use "_", a string that does not worth to be translated, as default value to mark
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// a key that does not have a translation.
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NSString *localizedString = bundle ? [bundle localizedStringForKey:key value:@"_" table:tableName] : [super localizedStringForKey:key value:@"_" table:tableName];
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if (!localizedString || (localizedString.length == 1 && [localizedString isEqualToString:@"_"]))
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{
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// Use the string in the fallback language
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NSBundle *fallbackBundle = objc_getAssociatedObject(self, &_fallbackBundle);
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localizedString = [fallbackBundle localizedStringForKey:key value:value table:tableName];
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}
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return localizedString;
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}
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@end
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@implementation NSBundle (MXKLanguage)
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+ (void)mxk_setLanguage:(NSString *)language
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{
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[self setupMXKLanguageBundle];
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// [NSBundle localizedStringForKey] calls will be redirected to the bundle corresponding
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// to "language"
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objc_setAssociatedObject([NSBundle mainBundle],
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&_bundle, language ? [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]] : nil,
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OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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objc_setAssociatedObject([NSBundle mainBundle],
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&_language, language,
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OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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+ (NSString *)mxk_language
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{
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return objc_getAssociatedObject([NSBundle mainBundle], &_language);
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}
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+ (void)mxk_setFallbackLanguage:(NSString *)language
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{
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[self setupMXKLanguageBundle];
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objc_setAssociatedObject([NSBundle mainBundle],
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&_fallbackBundle, language ? [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]] : nil,
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OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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objc_setAssociatedObject([NSBundle mainBundle],
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&_fallbackLanguage, language,
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OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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+ (NSString *)mxk_fallbackLanguage
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{
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return objc_getAssociatedObject([NSBundle mainBundle], &_fallbackLanguage);
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}
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#pragma mark - Private methods
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+ (void)setupMXKLanguageBundle
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{
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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// Use MXKLanguageBundle as the [NSBundle mainBundle] class
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object_setClass([NSBundle mainBundle], [MXKLanguageBundle class]);
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});
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}
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@end
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