[21] | 1 | // |
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| 2 | // NJRDateFormatter.m |
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| 3 | // Pester |
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| 4 | // |
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| 5 | // Created by Nicholas Riley on Wed Oct 09 2002. |
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| 6 | // Copyright (c) 2002 Nicholas Riley. All rights reserved. |
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| 7 | // |
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| 8 | |
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| 9 | #import "NJRDateFormatter.h" |
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| 10 | |
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[43] | 11 | NSUserDefaults *locale; |
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[21] | 12 | |
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| 13 | @implementation NJRDateFormatter |
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| 14 | |
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[43] | 15 | + (void)initialize; |
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| 16 | { |
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| 17 | locale = [[NSUserDefaults standardUserDefaults] retain]; |
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| 18 | } |
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| 19 | |
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| 20 | + (NSString *)format:(NSString *)format withoutComponent:(unichar)component; |
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| 21 | { |
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| 22 | NSScanner *scanner = [NSScanner scannerWithString: format]; |
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| 23 | NSRange range; |
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| 24 | [scanner setCharactersToBeSkipped: [NSCharacterSet characterSetWithCharactersInString: @""]]; |
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| 25 | while ([scanner scanUpToString: @"%" intoString: nil] || ![scanner isAtEnd]) { |
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| 26 | range.location = [scanner scanLocation]; |
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| 27 | [scanner scanUpToCharactersFromSet: [NSCharacterSet letterCharacterSet] intoString: nil]; |
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| 28 | if ([format characterAtIndex: [scanner scanLocation]] == component) { |
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| 29 | if ([scanner scanUpToString: @"%" intoString: nil] && ![scanner isAtEnd]) { |
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| 30 | NSMutableString *mutableFormat = [format mutableCopy]; |
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| 31 | if (range.location != 0 && [[NSCharacterSet punctuationCharacterSet] characterIsMember: [format characterAtIndex: range.location - 1]]) { |
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| 32 | range.location--; // "%I:%M:%S%p" -> "%I:%M%p" |
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| 33 | } |
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| 34 | range.length = [scanner scanLocation] - range.location; |
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| 35 | [mutableFormat deleteCharactersInRange: range]; |
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| 36 | format = [mutableFormat copy]; |
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| 37 | [mutableFormat release]; |
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| 38 | return [format autorelease]; |
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| 39 | } else { |
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| 40 | range = [format rangeOfCharacterFromSet: [NSCharacterSet letterCharacterSet] options: NSBackwardsSearch range: NSMakeRange(0, range.location)]; |
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| 41 | return [format substringToIndex: NSMaxRange(range)]; |
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| 42 | } |
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| 43 | } |
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| 44 | } |
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| 45 | return format; |
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| 46 | } |
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| 47 | |
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| 48 | + (NSString *)localizedDateFormatIncludingWeekday:(BOOL)weekday; |
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| 49 | { |
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| 50 | NSString *format = [locale stringForKey: NSDateFormatString]; |
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| 51 | if (weekday) return format; |
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| 52 | return [self format: format withoutComponent: (unichar)'A']; |
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| 53 | } |
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| 54 | |
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| 55 | + (NSString *)localizedShortDateFormatIncludingWeekday:(BOOL)weekday; |
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| 56 | { |
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| 57 | NSString *format = [locale stringForKey: NSShortDateFormatString]; |
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| 58 | if (weekday) return format; |
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| 59 | return [self format: format withoutComponent: (unichar)'A']; |
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| 60 | } |
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| 61 | |
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| 62 | NSString *stringByInsertingStringAtLocation(NSString *string, NSString *insert, int location) { |
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| 63 | return [NSString stringWithFormat: @"%@%@%@", [string substringToIndex: location], insert, |
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| 64 | [string substringFromIndex: location]]; |
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| 65 | } |
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| 66 | |
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| 67 | + (NSString *)localizedTimeFormatIncludingSeconds:(BOOL)seconds; |
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| 68 | { |
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| 69 | NSString *format = [locale stringForKey: NSTimeFormatString]; |
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| 70 | NSArray *ampm = [locale arrayForKey: NSAMPMDesignation]; |
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| 71 | NSString *am = [ampm objectAtIndex: 0], *pm = [ampm objectAtIndex: 1]; |
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| 72 | // work around bug with inconsistent AM/PM and time format |
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| 73 | if ([am isEqualToString: @""] && [pm isEqualToString: @""]) |
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| 74 | format = [self format: format withoutComponent: 'p']; |
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| 75 | else { |
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| 76 | NSRange ampmComponentRange = [format rangeOfString: @"%p"]; |
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| 77 | NSCharacterSet *whitespace = [NSCharacterSet whitespaceCharacterSet]; |
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| 78 | BOOL needSpaceInFormatString = ![whitespace characterIsMember: [am characterAtIndex: 0]]; |
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| 79 | if (ampmComponentRange.location == NSNotFound) // "%1I:%M:%S" -> "%1I:%M:%S%p", "%1I:%M:%S %p" |
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| 80 | format = [format stringByAppendingString: (needSpaceInFormatString ? @" %p" : @"%p")]; |
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| 81 | else { |
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| 82 | NSRange whitespaceRange = [format rangeOfCharacterFromSet: whitespace options: NSBackwardsSearch range: NSMakeRange(0, ampmComponentRange.location)]; |
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| 83 | if (whitespaceRange.location == NSNotFound) { |
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| 84 | if (needSpaceInFormatString) // "%1I:%M:%S%p" -> "%1I:%M:%S %p" |
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| 85 | format = stringByInsertingStringAtLocation(format, @" ", ampmComponentRange.location); |
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| 86 | // else "%1I:%M:%S%p" -> no change |
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| 87 | } else { |
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| 88 | if (NSMaxRange(whitespaceRange) == ampmComponentRange.location) { |
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| 89 | if (!needSpaceInFormatString) // "%1I:%M:%S %p" -> "%1I:%M:%S%p" |
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| 90 | format = [[format substringToIndex: whitespaceRange.location] stringByAppendingString: [format substringFromIndex: ampmComponentRange.location]]; |
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| 91 | // else "%1I:%M:%S %p" -> no change |
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| 92 | } else { |
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| 93 | if (needSpaceInFormatString) |
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| 94 | format = stringByInsertingStringAtLocation(format, @" ", ampmComponentRange.location); |
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| 95 | // else "%1I %M:%S%p" -> no change |
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| 96 | } |
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| 97 | } |
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| 98 | } |
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| 99 | } |
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| 100 | if (seconds) return format; |
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| 101 | return [self format: format withoutComponent: 'S']; |
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| 102 | } |
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| 103 | |
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[21] | 104 | // workaround for bug in Jaguar (and earlier?) NSCalendarDate dateWithNaturalLanguageString: |
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| 105 | NSString * stringByRemovingSurroundingWhitespace(NSString *string) { |
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| 106 | static NSCharacterSet *nonWhitespace = nil; |
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| 107 | NSRange firstValidCharacter, lastValidCharacter; |
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| 108 | |
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| 109 | if (!nonWhitespace) { |
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| 110 | nonWhitespace = [[[NSCharacterSet characterSetWithCharactersInString: |
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| 111 | @" \t\r\n"] invertedSet] retain]; |
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| 112 | } |
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| 113 | |
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| 114 | firstValidCharacter = [string rangeOfCharacterFromSet:nonWhitespace]; |
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| 115 | if (firstValidCharacter.length == 0) |
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| 116 | return @""; |
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[43] | 117 | lastValidCharacter = [string rangeOfCharacterFromSet:nonWhitespace options: NSBackwardsSearch]; |
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[21] | 118 | |
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| 119 | if (firstValidCharacter.location == 0 && lastValidCharacter.location == [string length] - 1) |
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| 120 | return string; |
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| 121 | else |
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[43] | 122 | return [string substringWithRange: NSUnionRange(firstValidCharacter, lastValidCharacter)]; |
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[21] | 123 | } |
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| 124 | |
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[43] | 125 | - (id)initWithDateFormat:(NSString *)format allowNaturalLanguage:(BOOL)flag; |
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| 126 | { |
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| 127 | if ( (self = [super initWithDateFormat: format allowNaturalLanguage: flag]) != nil) { |
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| 128 | NSRange ampmRange = [format rangeOfString: @"%p"]; |
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| 129 | NSArray *ampm = [locale arrayForKey: NSAMPMDesignation]; |
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| 130 | NSString *am = [ampm objectAtIndex: 0], *pm = [ampm objectAtIndex: 1]; |
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| 131 | if (flag && ampmRange.location != NSNotFound && |
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| 132 | [[locale stringForKey: NSTimeFormatString] rangeOfString: @"%p"].location == NSNotFound && ![am isEqualToString: pm]) { |
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| 133 | // workaround for bug in NSCalendarDate dateWithNaturalLanguageString: discarding AM/PM value when AM/PM designations have spaces in them (of which the use thereof is a workaround for NSDateFormatter discarding the AM/PM value) |
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| 134 | NSMutableString *paddedFormat = [format mutableCopy]; |
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| 135 | [paddedFormat replaceCharactersInRange: ampmRange withString: @" %p"]; |
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| 136 | alteredLocale = [[locale dictionaryRepresentation] mutableCopy]; |
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| 137 | [(NSMutableDictionary *)alteredLocale setObject: paddedFormat forKey: NSTimeFormatString]; |
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| 138 | [(NSMutableDictionary *)alteredLocale setObject: |
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| 139 | [NSArray arrayWithObjects: stringByRemovingSurroundingWhitespace(am), |
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| 140 | stringByRemovingSurroundingWhitespace(pm)] forKey: NSAMPMDesignation]; |
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| 141 | [paddedFormat release]; |
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| 142 | } else { |
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| 143 | alteredLocale = [(NSDictionary *)locale retain]; |
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| 144 | } |
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| 145 | } |
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| 146 | return self; |
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| 147 | } |
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[21] | 148 | |
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[43] | 149 | - (void)dealloc; |
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| 150 | { |
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| 151 | [alteredLocale release]; |
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| 152 | [super dealloc]; |
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| 153 | } |
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| 154 | |
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[21] | 155 | - (BOOL)getObjectValue:(id *)anObject forString:(NSString *)string errorDescription:(NSString **)error |
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| 156 | { |
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| 157 | NSCalendarDate *date; |
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| 158 | if (![self allowsNaturalLanguage]) |
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| 159 | return [super getObjectValue: anObject forString: string errorDescription: error]; |
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| 160 | if (string == nil) return nil; |
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| 161 | NS_DURING // dateWithNaturalLanguageString: can throw an exception |
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[43] | 162 | date = [NSCalendarDate dateWithNaturalLanguageString: stringByRemovingSurroundingWhitespace(string) locale: alteredLocale]; |
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| 163 | // NSLog(@"%@: natural language date is %@", string, date); |
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[21] | 164 | NS_HANDLER |
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| 165 | if (error != nil) *error = [localException reason]; |
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| 166 | NS_VALUERETURN(NO, BOOL); |
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| 167 | NS_ENDHANDLER |
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[43] | 168 | // [super getObjectValue: anObject forString: string errorDescription: error]; |
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| 169 | // NSLog(@"%@: formatter date is %@", string, anObject == nil ? @"(null)" : *anObject); |
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[21] | 170 | if (date == nil) return [super getObjectValue: anObject forString: string errorDescription: error]; |
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| 171 | *anObject = date; |
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| 172 | return YES; |
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| 173 | } |
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| 174 | |
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| 175 | @end |
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