ee3c7fe50f
Monotone-Parent: d85d7d8fee328504d17e9458ec53c9819d09b3bc Monotone-Revision: bc0e93dcef9a5cd587d3be1a69b22cdf040ed789 Monotone-Author: flachapelle@inverse.ca Monotone-Date: 2008-12-12T18:43:14 Monotone-Branch: ca.inverse.sogo
112 lines
2.9 KiB
Objective-C
112 lines
2.9 KiB
Objective-C
/*
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Copyright (C) 2004-2005 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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#import <NGExtensions/NSCalendarDate+misc.h>
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#import "iCalRecurrenceCalculator.h"
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@interface iCalYearlyRecurrenceCalculator : iCalRecurrenceCalculator
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@end
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#import <NGExtensions/NGCalendarDateRange.h>
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#import "iCalRecurrenceRule.h"
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#import "NSCalendarDate+ICal.h"
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@interface iCalRecurrenceCalculator (PrivateAPI)
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- (NSCalendarDate *) lastInstanceStartDate;
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@end
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@implementation iCalYearlyRecurrenceCalculator
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- (NSArray *)
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recurrenceRangesWithinCalendarDateRange: (NGCalendarDateRange *) _r
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{
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NSMutableArray *ranges;
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NSCalendarDate *firStart, *rStart, *rEnd, *until;
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unsigned i, count, interval;
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int diff;
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firStart = [firstRange startDate];
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rStart = [_r startDate];
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rEnd = [_r endDate];
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interval = [rrule repeatInterval];
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until = [self lastInstanceStartDate];
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if (until)
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{
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if ([until compare: rStart] == NSOrderedAscending)
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return nil;
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if ([until compare: rEnd] == NSOrderedDescending)
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rEnd = until;
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}
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diff = [firStart yearsBetweenDate: rStart];
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if ((diff != 0) && [rStart compare: firStart] == NSOrderedAscending)
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diff = -diff;
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count = [rStart yearsBetweenDate: rEnd] + 1;
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ranges = [NSMutableArray arrayWithCapacity: count];
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for (i = 0 ; i < count; i++)
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{
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int test;
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test = diff + i;
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if ((test >= 0) && (test % interval) == 0)
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{
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NSCalendarDate *start, *end;
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NGCalendarDateRange *r;
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start = [firStart dateByAddingYears: diff + i
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months: 0
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days: 0];
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[start setTimeZone: [firStart timeZone]];
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end = [start addTimeInterval: [firstRange duration]];
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r = [NGCalendarDateRange calendarDateRangeWithStartDate: start
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endDate: end];
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if ([_r containsDateRange: r])
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[ranges addObject: r];
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}
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}
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return ranges;
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}
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- (NSCalendarDate *) lastInstanceStartDate
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{
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NSCalendarDate *firStart, *lastInstanceStartDate;
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if ([rrule repeatCount] > 0)
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{
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firStart = [firstRange startDate];
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lastInstanceStartDate
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= [firStart dateByAddingYears: ([rrule repeatInterval]
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* ([rrule repeatCount] - 1))
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months: 0
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days: 0];
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}
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else
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lastInstanceStartDate = [super lastInstanceStartDate];
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return lastInstanceStartDate;
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}
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@end /* iCalYearlyRecurrenceCalculator */
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