jens@0: //
jens@0: //  TimeIntervalFormatter.m
jens@0: //  MYUtilities
jens@0: //
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@0: #import "TimeIntervalFormatter.h"
jens@0: 
jens@0: 
jens@0: @implementation TimeIntervalFormatter
jens@0: 
jens@0: 
jens@0: - (void) awakeFromNib
jens@0: {
jens@0:     _showsMinutes = YES;
jens@0: }
jens@0: 
jens@0: - (void) setShowsMinutes: (BOOL)show                {_showsMinutes = show;}
jens@0: - (void) setShowsFractionalSeconds: (BOOL)show      {_showsFractionalSeconds = show;}
jens@0: 
jens@0: 
jens@0: - (NSString*) stringForObjectValue: (id)object
jens@0: {
jens@0:     if (![object isKindOfClass:[NSNumber class]])
jens@0:         return nil;
jens@0:     NSTimeInterval time = [object doubleValue];
jens@0:     NSString *sign;
jens@0:     if( time==0.0 )
jens@0:         return nil;
jens@0:     else if( time < 0.0 ) {
jens@0:         sign = @"-";
jens@0:         time = -time;
jens@0:     } else
jens@0:         sign = @"";
jens@0:     if( ! _showsFractionalSeconds )
jens@0:         time = floor(time);
jens@0:     int minutes = (int)floor(time / 60.0);
jens@0:     if( _showsMinutes || minutes>0 ) {
jens@0:         double seconds = time - 60.0*minutes;
jens@0:         return [NSString stringWithFormat: (_showsFractionalSeconds ?@"%@%d:%06.3lf" :@"%@%d:%02.0lf"),
jens@0:                                            sign,minutes,seconds];
jens@0:     } else {
jens@0:         return [NSString stringWithFormat: (_showsFractionalSeconds ?@"%@%.3lf" :@"%@%.0lf"),
jens@0:                                            sign,time];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@0: - (BOOL)getObjectValue:(id *)anObject
jens@0:              forString:(NSString *)string 
jens@0:       errorDescription:(NSString **)error
jens@0: {
jens@0:     NSScanner *scanner = [NSScanner scannerWithString: string];
jens@0:     [scanner setCharactersToBeSkipped: [NSCharacterSet whitespaceCharacterSet]];
jens@0:     double seconds;
jens@0:     if( [scanner isAtEnd] ) {
jens@0:         seconds = 0.0;
jens@0:     } else {
jens@0:         if( ! [scanner scanDouble: &seconds] || seconds<0.0 ) goto error;
jens@0:         if( [scanner scanString: @":" intoString: NULL] ) {
jens@0:             double minutes = seconds;
jens@0:             if( ! [scanner scanDouble: &seconds] || seconds<0.0 ) goto error;
jens@0:             seconds += 60*minutes;
jens@0:         }
jens@0:         if( ! [scanner isAtEnd] ) goto error;
jens@0:     }
jens@0:     *anObject = [NSNumber numberWithDouble: seconds];
jens@0:     return YES;
jens@0:     
jens@0: error:
jens@0:     *anObject = nil;
jens@0:     if( error )
jens@0:         *error = @"Not a valid time interval";
jens@0:     return NO;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (BOOL)isPartialStringValid:(NSString **)partialStringPtr 
jens@0:        proposedSelectedRange:(NSRangePointer)proposedSelRangePtr
jens@0:               originalString:(NSString *)origString 
jens@0:        originalSelectedRange:(NSRange)origSelRange 
jens@0:             errorDescription:(NSString **)error
jens@0: {
jens@0:     static NSCharacterSet *sIllegalChars;
jens@0:     if( ! sIllegalChars )
jens@0:         sIllegalChars = [[[NSCharacterSet characterSetWithCharactersInString: @"0123456789.:"] 
jens@0:                                 invertedSet] retain];
jens@0:     return [*partialStringPtr rangeOfCharacterFromSet: sIllegalChars].length == 0;
jens@0: }
jens@0: 
jens@0: 
jens@0: @end