TimeIntervalFormatter.m
author Jens Alfke <jens@mooseyard.com>
Wed Sep 02 08:41:25 2009 -0700 (2009-09-02)
changeset 35 5cab3034d3a1
parent 1 e55a17cdabd2
permissions -rw-r--r--
10.6 compatibility: Fix some new compiler warnings, and work around apparent regressions in NSTask and -stringByStandardizingPath.
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//
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//  TimeIntervalFormatter.m
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//  MYUtilities
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//
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//  Copyright 2008 Jens Alfke. All rights reserved.
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//
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#import "TimeIntervalFormatter.h"
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@implementation TimeIntervalFormatter
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- (id) init
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{
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    self = [super init];
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    if (self != nil) {
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        _showsMinutes = YES;
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    }
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    return self;
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}
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- (void) awakeFromNib
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{
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    _showsMinutes = YES;
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}
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- (void) setShowsMinutes: (BOOL)show                {_showsMinutes = show;}
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- (void) setShowsFractionalSeconds: (BOOL)show      {_showsFractionalSeconds = show;}
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+ (NSString*) formatTimeInterval: (NSTimeInterval)interval
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{
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    TimeIntervalFormatter *fmt = [[self alloc] init];
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    NSString *result = [fmt stringForObjectValue: [NSNumber numberWithDouble: interval]];
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    [fmt release];
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    return result;
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}
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- (NSString*) stringForObjectValue: (id)object
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{
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    if (![object isKindOfClass:[NSNumber class]])
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        return nil;
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    NSTimeInterval time = [object doubleValue];
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    NSString *sign;
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    if( time==0.0 )
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        return nil;
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    else if( time < 0.0 ) {
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        sign = @"-";
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        time = -time;
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    } else
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        sign = @"";
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    if( ! _showsFractionalSeconds )
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        time = floor(time);
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    int minutes = (int)floor(time / 60.0);
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    if( _showsMinutes || minutes>0 ) {
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        double seconds = time - 60.0*minutes;
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        return [NSString stringWithFormat: (_showsFractionalSeconds ?@"%@%d:%06.3lf" :@"%@%d:%02.0lf"),
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                                           sign,minutes,seconds];
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    } else {
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        return [NSString stringWithFormat: (_showsFractionalSeconds ?@"%@%.3lf" :@"%@%.0lf"),
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                                           sign,time];
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    }
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}
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- (BOOL)getObjectValue:(id *)anObject
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             forString:(NSString *)string 
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      errorDescription:(NSString **)error
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{
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    NSScanner *scanner = [NSScanner scannerWithString: string];
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    [scanner setCharactersToBeSkipped: [NSCharacterSet whitespaceCharacterSet]];
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    double seconds;
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    if( [scanner isAtEnd] ) {
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        seconds = 0.0;
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    } else {
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        if( ! [scanner scanDouble: &seconds] || seconds<0.0 ) goto error;
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        if( [scanner scanString: @":" intoString: NULL] ) {
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            double minutes = seconds;
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            if( ! [scanner scanDouble: &seconds] || seconds<0.0 ) goto error;
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            seconds += 60*minutes;
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        }
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        if( ! [scanner isAtEnd] ) goto error;
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    }
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    *anObject = [NSNumber numberWithDouble: seconds];
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    return YES;
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error:
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    *anObject = nil;
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    if( error )
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        *error = @"Not a valid time interval";
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    return NO;
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}
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- (BOOL)isPartialStringValid:(NSString **)partialStringPtr 
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       proposedSelectedRange:(NSRangePointer)proposedSelRangePtr
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              originalString:(NSString *)origString 
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       originalSelectedRange:(NSRange)origSelRange 
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            errorDescription:(NSString **)error
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{
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    static NSCharacterSet *sIllegalChars;
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    if( ! sIllegalChars )
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        sIllegalChars = [[[NSCharacterSet characterSetWithCharactersInString: @"0123456789.:"] 
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                                invertedSet] retain];
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    return [*partialStringPtr rangeOfCharacterFromSet: sIllegalChars].length == 0;
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}
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@end
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/*
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 Copyright (c) 2008, Jens Alfke <jens@mooseyard.com>. All rights reserved.
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 Redistribution and use in source and binary forms, with or without modification, are permitted
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 provided that the following conditions are met:
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 * Redistributions of source code must retain the above copyright notice, this list of conditions
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 and the following disclaimer.
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 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
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 and the following disclaimer in the documentation and/or other materials provided with the
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 distribution.
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 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
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 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
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 BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
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  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
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 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
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 THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */