ample/Ample/Transformers.m

89 lines
2.0 KiB
Mathematica
Raw Normal View History

//
// Transformers.m
// Ample
//
// Created by Kelvin Sherlock on 9/13/2020.
// Copyright © 2020 Kelvin Sherlock. All rights reserved.
//
#import "Transformers.h"
#import <AppKit/NSColor.h>
@implementation FilePathTransformer
+ (Class)transformedValueClass {
return [NSString class];
}
+ (BOOL)allowsReverseTransformation {
return NO;
}
- (id)transformedValue:(id)value {
if (!value) return value;
return [(NSString *)value lastPathComponent];
}
@end
@implementation FileSizeTransformer
+ (Class)transformedValueClass {
return [NSString class];
}
+ (BOOL)allowsReverseTransformation {
return NO;
}
- (id)transformedValue:(id)value {
if (!value) return value;
if (![value respondsToSelector: @selector(integerValue)]) {
[NSException raise: NSInternalInconsistencyException
format: @"Value (%@) does not respond to -integerValue.",
[value class]];
}
NSInteger size = [(NSNumber *)value integerValue];
if (size < 0) return nil;
if (size < 1024*1024) return [NSString stringWithFormat: @"%.1fKB", (float)size / 1024];
if (size < 1024*1024*1024) return [NSString stringWithFormat: @"%.1fMB", (float)size / (1024*1024)];
return [NSString stringWithFormat: @"%.1fGB", (float)size / (1024*1024*1024)];
}
@end
@implementation ValidColorTransformer
+ (BOOL)allowsReverseTransformation {
return NO;
}
+ (Class)transformedValueClass {
return [NSColor class];
}
- (id)transformedValue:(id)value {
BOOL valid = [(NSNumber *)value boolValue];
return valid ? nil : [NSColor systemRedColor];
}
@end
void RegisterTransformers(void) {
NSValueTransformer *t;
t = [FileSizeTransformer new];
[NSValueTransformer setValueTransformer: t forName: @"FileSizeTransformer"];
t = [FilePathTransformer new];
[NSValueTransformer setValueTransformer: t forName: @"FilePathTransformer"];
t = [ValidColorTransformer new];
[NSValueTransformer setValueTransformer: t forName: @"ValidColorTransformer"];
}