38 lines
1.3 KiB
Mathematica
38 lines
1.3 KiB
Mathematica
|
//
|
||
|
|
// NSValueTransformer+MTLInversionAdditions.m
|
||
|
|
// Mantle
|
||
|
|
//
|
||
|
|
// Created by Justin Spahr-Summers on 2013-05-18.
|
||
|
|
// Copyright (c) 2013 GitHub. All rights reserved.
|
||
|
|
//
|
||
|
|
|
||
|
|
#import "NSValueTransformer+MTLInversionAdditions.h"
|
||
|
|
#import "MTLTransformerErrorHandling.h"
|
||
|
|
#import "MTLValueTransformer.h"
|
||
|
|
|
||
|
|
@implementation NSValueTransformer (MTLInversionAdditions)
|
||
|
|
|
||
|
|
- (NSValueTransformer *)mtl_invertedTransformer {
|
||
|
|
NSParameterAssert(self.class.allowsReverseTransformation);
|
||
|
|
|
||
|
|
if ([self conformsToProtocol:@protocol(MTLTransformerErrorHandling)]) {
|
||
|
|
NSParameterAssert([self respondsToSelector:@selector(reverseTransformedValue:success:error:)]);
|
||
|
|
|
||
|
|
id<MTLTransformerErrorHandling> errorHandlingSelf = (id)self;
|
||
|
|
|
||
|
|
return [MTLValueTransformer transformerUsingForwardBlock:^(id value, BOOL *success, NSError **error) {
|
||
|
|
return [errorHandlingSelf reverseTransformedValue:value success:success error:error];
|
||
|
|
} reverseBlock:^(id value, BOOL *success, NSError **error) {
|
||
|
|
return [errorHandlingSelf transformedValue:value success:success error:error];
|
||
|
|
}];
|
||
|
|
} else {
|
||
|
|
return [MTLValueTransformer transformerUsingForwardBlock:^(id value, BOOL *success, NSError **error) {
|
||
|
|
return [self reverseTransformedValue:value];
|
||
|
|
} reverseBlock:^(id value, BOOL *success, NSError **error) {
|
||
|
|
return [self transformedValue:value];
|
||
|
|
}];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|