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#import "MASDictionaryTransformer.h"
#import "MASShortcut.h"
NSString *const MASDictionaryTransformerName = @"MASDictionaryTransformer";
static NSString *const MASKeyCodeKey = @"keyCode";
static NSString *const MASModifierFlagsKey = @"modifierFlags";
@implementation MASDictionaryTransformer
+ (BOOL) allowsReverseTransformation
{
return YES;
}
// Storing nil values as an empty dictionary lets us differ between
// “not available, use default value” and “explicitly set to none”.
// See http://stackoverflow.com/questions/5540760 for details.
- (NSDictionary*) reverseTransformedValue: (MASShortcut*) shortcut
{
if (shortcut == nil) {
return [NSDictionary dictionary];
} else {
return @{
MASKeyCodeKey: @([shortcut keyCode]),
MASModifierFlagsKey: @([shortcut modifierFlags])
};
}
}
- (MASShortcut*) transformedValue: (NSDictionary*) dictionary
{
// We have to be defensive here as the value may come from user defaults.
if (![dictionary isKindOfClass:[NSDictionary class]]) {
return nil;
}
id keyCodeBox = [dictionary objectForKey:MASKeyCodeKey];
id modifierFlagsBox = [dictionary objectForKey:MASModifierFlagsKey];
SEL integerValue = @selector(integerValue);
if (![keyCodeBox respondsToSelector:integerValue] || ![modifierFlagsBox respondsToSelector:integerValue]) {
return nil;
}
return [MASShortcut
shortcutWithKeyCode:[keyCodeBox integerValue]
modifierFlags:[modifierFlagsBox integerValue]];
}
@end
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