136 lines
3.3 KiB
Objective-C
136 lines
3.3 KiB
Objective-C
/*
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Copyright (C) 2000-2005 SKYRIX Software AG
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This file is part of SOPE.
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SOPE is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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SOPE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with SOPE; see the file COPYING. If not, write to the
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Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA.
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*/
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#warning this module should be cleaned up and \
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merged with NSCalendarDate+NGCards
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#import <Foundation/NSTimeZone.h>
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#import <NGExtensions/NSCalendarDate+misc.h>
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#import "NSCalendarDate+ICal.h"
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static NSTimeZone *gmt = nil;
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static inline void _setupGMT(void) {
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if (gmt == nil)
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gmt = [[NSTimeZone timeZoneForSecondsFromGMT: 0] retain];
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}
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@implementation NSCalendarDate(iCalRepresentation)
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/* represention */
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static NSString *gmtcalfmt = @"%Y%m%dT%H%M%SZ";
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- (NSString *)icalStringInGMT {
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NSTimeZone *oldtz;
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NSString *s;
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_setupGMT();
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/* set GMT as timezone */
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oldtz = [[self timeZone] retain];
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if (oldtz == gmt) {
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[oldtz release];
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oldtz = nil;
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}
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else {
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[self setTimeZone:gmt];
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}
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/* calc string */
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s = [self descriptionWithCalendarFormat:gmtcalfmt];
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/* restore old timezone */
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if (oldtz) {
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[self setTimeZone:oldtz];
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[oldtz release];
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}
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return s;
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}
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- (NSString *)icalStringWithTimeZone:(NSTimeZone *)_tz {
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_setupGMT();
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if (_tz == gmt || _tz == nil)
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return [self icalStringInGMT];
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else if ([_tz isEqual:gmt])
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return [self icalStringInGMT];
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else {
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/* not in GMT */
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//NSLog(@"WARNING(%s): arbitary timezones not supported yet: %@",
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// __PRETTY_FUNCTION__, _tz);
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return [self icalStringInGMT];
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}
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}
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- (NSString *)icalString {
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_setupGMT();
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return [self icalStringWithTimeZone:gmt];
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}
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@end /* NSDate(ICalValue) */
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#ifndef ABS
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#define ABS(a) ((a) < 0 ? -(a) : (a))
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#endif
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@implementation NSCalendarDate (iCalRecurrenceCalculatorExtensions)
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- (unsigned)yearsBetweenDate:(NSCalendarDate *)_date {
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return ABS([self yearOfCommonEra] - [_date yearOfCommonEra]);
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}
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- (unsigned)monthsBetweenDate:(NSCalendarDate *)_date {
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NSCalendarDate *start, *end;
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NSComparisonResult order;
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int yDiff;
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order = [self compare:_date];
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if (order == NSOrderedSame)
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return 0;
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else if (order == NSOrderedAscending) {
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start = self;
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end = _date;
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}
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else {
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start = _date;
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end = self;
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}
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yDiff = [end yearOfCommonEra] - [start yearOfCommonEra];
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if (yDiff > 0) {
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unsigned monthsRemaining, monthsToGo;
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monthsRemaining = 12 - [start monthOfYear];
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monthsToGo = [end monthOfYear];
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yDiff -= 1;
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return monthsRemaining + monthsToGo + (12 * yDiff);
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}
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/* start and end in same year, calculate plain diff */
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return [end monthOfYear] - [start monthOfYear];
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}
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- (unsigned)daysBetweenDate:(NSCalendarDate *)_date {
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return ABS([self julianNumber] - [_date julianNumber]);
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}
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@end /* NSCalendarDate (iCalRecurrenceCalculatorExtensions) */
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