cog/Playlist/SecondsFormatter.m

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/*
* $Id: SecondsFormatter.m 227 2007-01-21 06:22:13Z stephen_booth $
*
* Copyright (C) 2006 - 2007 Stephen F. Booth <me@sbooth.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#import "SecondsFormatter.h"
@implementation SecondsFormatter
- (NSString *) stringForObjectValue:(id)object
{
NSString *result = nil;
unsigned value;
unsigned days = 0;
unsigned hours = 0;
unsigned minutes = 0;
unsigned seconds = 0;
if(nil == object || NO == [object isKindOfClass:[NSNumber class]] || isnan([object doubleValue])) {
return nil;
}
value = (unsigned)([object doubleValue]);
seconds = value % 60;
minutes = value / 60;
while(60 <= minutes) {
minutes -= 60;
++hours;
}
while(24 <= hours) {
hours -= 24;
++days;
}
if(0 < days) {
result = [NSString stringWithFormat:@"%u:%.2u:%.2u:%.2u", days, hours, minutes, seconds];
}
else if(0 < hours) {
result = [NSString stringWithFormat:@"%u:%.2u:%.2u", hours, minutes, seconds];
}
else if(0 < minutes) {
result = [NSString stringWithFormat:@"%u:%.2u", minutes, seconds];
}
else {
result = [NSString stringWithFormat:@"0:%.2u", seconds];
}
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return result;
}
- (BOOL) getObjectValue:(id *)object forString:(NSString *)string errorDescription:(NSString **)error
{
NSScanner *scanner = nil;
BOOL result = NO;
int value = 0;
unsigned seconds = 0;
scanner = [NSScanner scannerWithString:string];
while(NO == [scanner isAtEnd]) {
// Grab a value
if([scanner scanInt:&value]) {
seconds *= 60;
seconds += value;
result = YES;
}
// Grab the separator, if present
[scanner scanString:@":" intoString:NULL];
}
if(result && NULL != object) {
*object = [NSNumber numberWithUnsignedInt:seconds];
}
else if(NULL != error) {
*error = @"Couldn't convert value to seconds";
}
return result;
}
- (NSAttributedString *) attributedStringForObjectValue:(id)object withDefaultAttributes:(NSDictionary *)attributes
{
NSAttributedString *result = nil;
result = [[NSAttributedString alloc] initWithString:[self stringForObjectValue:object] attributes:attributes];
return [result autorelease];
}
@end