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tdepim/libkcal/recurrence.cpp

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/*
This file is part of libkcal.
Copyright (c) 1998 Preston Brown <pbrown@kde.org>
Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
Copyright (c) 2002 David Jarvie <software@astrojar.org.uk>
Copyright (C) 2005 Reinhold Kainhofer <kainhofer@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <limits.h>
#include <kdebug.h>
#include <kglobal.h>
#include <klocale.h>
#include <tqbitarray.h>
#include "recurrence.h"
#include "recurrencerule.h"
using namespace KCal;
Recurrence::Recurrence()
: mFloating( false ),
mRecurReadOnly(false),
mCachedType(rMax)
{
mExRules.setAutoDelete( true );
mRRules.setAutoDelete( true );
}
Recurrence::Recurrence( const Recurrence &r )
: RecurrenceRule::Observer(),
mRDateTimes( r.mRDateTimes ), mRDates( r.mRDates ),
mExDateTimes( r.mExDateTimes ), mExDates( r.mExDates ),
mStartDateTime( r.mStartDateTime ),
mFloating( r.mFloating ),
mRecurReadOnly(r.mRecurReadOnly),
mCachedType( r.mCachedType )
{
mExRules.setAutoDelete( true );
mRRules.setAutoDelete( true );
RecurrenceRule::List::ConstIterator rr;
for ( rr = r.mRRules.begin(); rr != r.mRRules.end(); ++rr ) {
RecurrenceRule *rule = new RecurrenceRule( *(*rr) );
mRRules.append( rule );
rule->addObserver( this );
}
for ( rr = r.mExRules.begin(); rr != r.mExRules.end(); ++rr ) {
RecurrenceRule *rule = new RecurrenceRule( *(*rr) );
mExRules.append( rule );
rule->addObserver( this );
}
}
Recurrence::~Recurrence()
{
}
bool Recurrence::operator==( const Recurrence& r2 ) const
{
if ( mStartDateTime != r2.mStartDateTime
|| mFloating != r2.mFloating
|| mRecurReadOnly != r2.mRecurReadOnly )
return false;
if ( mExDates != r2.mExDates ) return false;
if ( mExDateTimes != r2.mExDateTimes ) return false;
if ( mRDates != r2.mRDates ) return false;
if ( mRDateTimes != r2.mRDateTimes ) return false;
// Compare the rrules, exrules! Assume they have the same order... This only
// matters if we have more than one rule (which shouldn't be the default anyway)
if ( mRRules.count() != r2.mRRules.count() ) return false;
RecurrenceRule::List::ConstIterator rit1 = mRRules.begin();
RecurrenceRule::List::ConstIterator rit2 = r2.mRRules.begin();
while ( rit1 != mRRules.end() && rit2 != r2.mRRules.end() ) {
// dereference the iterator to the RecurrenceRule*, and that once again
// to RecurrenceRule...
if ( *(*rit1) != *(*rit2) ) return false;
++rit1;
++rit2;
}
RecurrenceRule::List::ConstIterator exit1 = mExRules.begin();
RecurrenceRule::List::ConstIterator exit2 = r2.mExRules.begin();
while ( exit1 != mExRules.end() && exit2 != r2.mExRules.end() ) {
// dereference the iterator to the RecurrenceRule*, and that once again
// to RecurrenceRule...
if ( *(*exit1) != *(*exit2) ) return false;
++exit1;
++exit2;
}
return true;
}
void Recurrence::addObserver( Observer *observer )
{
if ( !mObservers.contains( observer ) )
mObservers.append( observer );
}
void Recurrence::removeObserver( Observer *observer )
{
if ( mObservers.contains( observer ) )
mObservers.remove( observer );
}
TQDateTime Recurrence::startDateTime() const
{
if ( mFloating )
return TQDateTime( mStartDateTime.date(), TQTime( 0, 0, 0 ) );
else return mStartDateTime;
}
void Recurrence::setFloats( bool floats )
{
if ( mRecurReadOnly ) return;
if ( floats == mFloating ) return;
mFloating = floats;
RecurrenceRule::List::ConstIterator it;
for ( it = mRRules.begin(); it != mRRules.end(); ++it ) {
(*it)->setFloats( floats );
}
RecurrenceRule::List::ConstIterator it1;
for ( it1 = mExRules.begin(); it1 != mExRules.end(); ++it1 ) {
(*it1)->setFloats( floats );
}
updated();
}
RecurrenceRule *Recurrence::defaultRRule( bool create ) const
{
if ( mRRules.isEmpty() ) {
if ( !create || mRecurReadOnly ) return 0;
RecurrenceRule *rrule = new RecurrenceRule();
rrule->setStartDt( startDateTime() );
const_cast<KCal::Recurrence*>(this)->addRRule( rrule );
return rrule;
} else {
return mRRules.first();
}
}
RecurrenceRule *Recurrence::defaultRRuleConst() const
{
if ( mRRules.isEmpty() ) {
return 0;
} else {
return mRRules.first();
}
}
void Recurrence::updated()
{
// recurrenceType() re-calculates the type if it's rMax
mCachedType = rMax;
for ( TQValueList<Observer*>::ConstIterator it = mObservers.begin();
it != mObservers.end(); ++it ) {
if ( (*it) ) (*it)->recurrenceUpdated( this );
}
}
bool Recurrence::doesRecur() const
{
return !mRRules.isEmpty() || !mRDates.isEmpty() || !mRDateTimes.isEmpty();
}
ushort Recurrence::recurrenceType() const
{
if ( mCachedType == rMax ) {
mCachedType = recurrenceType( defaultRRuleConst() );
}
return mCachedType;
}
ushort Recurrence::recurrenceType( const RecurrenceRule *rrule )
{
if ( !rrule ) return rNone;
RecurrenceRule::PeriodType type = rrule->recurrenceType();
// BYSETPOS, BYWEEKNUMBER and BYSECOND were not supported in old versions
if ( !rrule->bySetPos().isEmpty() )
return rOther;
if ( !rrule->bySeconds().isEmpty() )
return rOther;
if ( !rrule->byWeekNumbers().isEmpty() )
return rOther;
// It wasn't possible to set BYMINUTES, BYHOUR etc. by the old code. So if
// it's set, it's none of the old types
if ( !rrule->byMinutes().isEmpty() )
return rOther;
if ( !rrule->byHours().isEmpty() )
return rOther;
// Possible combinations were:
// BYDAY: with WEEKLY, MONTHLY, YEARLY
// BYMONTHDAY: with MONTHLY, YEARLY
// BYMONTH: with YEARLY
// BYYEARDAY: with YEARLY
if ( !rrule->byYearDays().isEmpty() && type != RecurrenceRule::rYearly )
return rOther;
if ( !rrule->byMonths().isEmpty() && type != RecurrenceRule::rYearly )
return rOther;
if ( !rrule->byDays().isEmpty() ) {
if ( type != RecurrenceRule::rYearly && type != RecurrenceRule::rMonthly &&
type != RecurrenceRule::rWeekly )
return rOther;
}
switch ( type ) {
case RecurrenceRule::rNone: return rNone;
case RecurrenceRule::rMinutely: return rMinutely;
case RecurrenceRule::rHourly: return rHourly;
case RecurrenceRule::rDaily: return rDaily;
case RecurrenceRule::rWeekly: return rWeekly;
case RecurrenceRule::rMonthly: {
if ( rrule->byDays().isEmpty() ) return rMonthlyDay;
else if ( rrule->byMonthDays().isEmpty() ) return rMonthlyPos;
else return rOther; // both position and date specified
}
case RecurrenceRule::rYearly: {
// Possible combinations:
// rYearlyMonth: [BYMONTH &] BYMONTHDAY
// rYearlyDay: BYYEARDAY
// rYearlyPos: [BYMONTH &] BYDAY
if ( !rrule->byDays().isEmpty() ) {
// can only by rYearlyPos
if ( rrule->byMonthDays().isEmpty() && rrule->byYearDays().isEmpty() )
return rYearlyPos;
else return rOther;
} else if ( !rrule->byYearDays().isEmpty() ) {
// Can only be rYearlyDay
if ( rrule->byMonths().isEmpty() && rrule->byMonthDays().isEmpty() )
return rYearlyDay;
else return rOther;
} else {
return rYearlyMonth;
}
break;
}
default: return rOther;
}
return rOther;
}
bool Recurrence::recursOn(const TQDate &qd) const
{
TimeList tms;
// First handle dates. Exrules override
if ( mExDates.contains( qd ) ) return false;
// For all-day events a matching exrule excludes the whole day
// since exclusions take precedence over inclusions, we know it can't occur on that day.
if ( doesFloat() ) {
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
if ( (*rr)->recursOn( qd ) )
return false;
}
}
if ( mRDates.contains( qd ) ) return true;
// Check if it might recur today at all.
bool recurs = false;
if ( startDate() == qd ) recurs = true;
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
recurs = recurs || (*rr)->recursOn( qd );
}
// If we already know it recurs, no need to check the rdate list too.
if ( !recurs ) {
for ( DateTimeList::ConstIterator rit = mRDateTimes.begin();
rit != mRDateTimes.end(); ++rit ) {
if ( (*rit).date() == qd ) {
recurs = true;
break;
}
}
}
// If the event wouldn't recur at all, simply return false, don't check ex*
if ( !recurs ) return false;
// Check if there are any times for this day excluded, either by exdate or exrule:
bool exon = false;
for ( DateTimeList::ConstIterator exit = mExDateTimes.begin();
exit != mExDateTimes.end(); ++exit ) {
if ( (*exit).date() == qd ) {
exon = true;
break;
}
}
if ( !doesFloat() ) { // we have already checked floating times above
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
exon = exon || (*rr)->recursOn( qd );
}
}
if ( !exon ) {
// Simple case, nothing on that day excluded, return the value from before
return recurs;
} else {
// Harder part: I don't think there is any way other than to calculate the
// whole list of items for that day.
TimeList timesForDay( recurTimesOn( qd ) );
return !timesForDay.isEmpty();
}
}
bool Recurrence::recursAt( const TQDateTime &dt ) const
{
// if it's excluded anyway, don't bother to check if it recurs at all.
if ( mExDateTimes.contains( dt )) return false;
if ( mExDates.contains( dt.date() )) return false;
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
if ( (*rr)->recursAt( dt ) ) return false;
}
// Check explicit recurrences, then rrules.
bool occurs = ( startDateTime() == dt ) || mRDateTimes.contains( dt );
if ( occurs )
return true;
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
if ( (*rr)->recursAt( dt ) ) return true;
}
return false;
}
/** Calculates the cumulative end of the whole recurrence (rdates and rrules).
If any rrule is infinite, or the recurrence doesn't have any rrules or
rdates, an invalid date is returned. */
TQDateTime Recurrence::endDateTime() const
{
DateTimeList dts;
dts << startDateTime();
if ( !mRDates.isEmpty() ) dts << TQDateTime( mRDates.last(), TQTime( 0, 0, 0 ) );
if ( !mRDateTimes.isEmpty() ) dts << mRDateTimes.last();
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
TQDateTime rl( (*rr)->endDt() );
// if any of the rules is infinite, the whole recurrence is
if ( !rl.isValid() ) return TQDateTime();
dts << rl;
}
qSortUnique( dts );
if ( dts.isEmpty() ) return TQDateTime();
else return dts.last();
}
/** Calculates the cumulative end of the whole recurrence (rdates and rrules).
If any rrule is infinite, or the recurrence doesn't have any rrules or
rdates, an invalid date is returned. */
TQDate Recurrence::endDate() const
{
TQDateTime end( endDateTime() );
if ( end.isValid() ) { return end.date(); }
else return TQDate();
}
void Recurrence::setEndDate( const TQDate &date )
{
if ( doesFloat() )
setEndDateTime( TQDateTime( date, TQTime( 23, 59, 59 ) ) );
else
setEndDateTime( TQDateTime( date, mStartDateTime.time() ) );
}
void Recurrence::setEndDateTime( const TQDateTime &dateTime )
{
if ( mRecurReadOnly ) return;
RecurrenceRule *rrule = defaultRRule( true );
if ( !rrule ) return;
rrule->setEndDt( dateTime );
updated();
}
int Recurrence::duration() const
{
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) return rrule->duration();
else return 0;
}
// int Recurrence::durationTo( const TQDate &/*date*/ ) const
// {
// return 0;
// }
int Recurrence::durationTo( const TQDateTime &datetime ) const
{
// Emulate old behavior: This is just an interface to the first rule!
RecurrenceRule *rrule = defaultRRuleConst();
if ( !rrule ) return 0;
else return rrule->durationTo( datetime );
}
void Recurrence::setDuration( int duration )
{
if ( mRecurReadOnly ) return;
RecurrenceRule *rrule = defaultRRule( true );
if ( !rrule ) return;
rrule->setDuration( duration );
updated();
}
void Recurrence::unsetRecurs()
{
if ( mRecurReadOnly ) return;
mRRules.clearAll();
updated();
}
void Recurrence::clear()
{
if ( mRecurReadOnly ) return;
mRRules.clearAll();
mExRules.clearAll();
mRDates.clear();
mRDateTimes.clear();
mExDates.clear();
mExDateTimes.clear();
mCachedType = rMax;
updated();
}
void Recurrence::setStartDateTime( const TQDateTime &start )
{
if ( mRecurReadOnly ) return;
mStartDateTime = start;
setFloats( false ); // set all RRULEs and EXRULEs
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
(*rr)->setStartDt( start );
}
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
(*rr)->setStartDt( start );
}
updated();
}
void Recurrence::setStartDate( const TQDate &start )
{
setStartDateTime( TQDateTime( start, TQTime(0,0,0) ) );
setFloats( true );
}
int Recurrence::frequency() const
{
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) return rrule->frequency();
else return 0;
}
// Emulate the old behaviour. Make this methods just an interface to the
// first rrule
void Recurrence::setFrequency( int freq )
{
if ( mRecurReadOnly || freq <= 0 ) return;
RecurrenceRule *rrule = defaultRRule( true );
if ( rrule )
rrule->setFrequency( freq );
updated();
}
// WEEKLY
int Recurrence::weekStart() const
{
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) return rrule->weekStart();
else return 1;
}
// Emulate the old behavior
TQBitArray Recurrence::days() const
{
TQBitArray days( 7 );
days.fill( 0 );
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) {
TQValueList<RecurrenceRule::WDayPos> bydays = rrule->byDays();
for ( TQValueListConstIterator<RecurrenceRule::WDayPos> it = bydays.begin();
it != bydays.end(); ++it ) {
if ( (*it).pos() == 0 ) {
days.setBit( (*it).day() - 1 );
}
}
}
return days;
}
// MONTHLY
// Emulate the old behavior
TQValueList<int> Recurrence::monthDays() const
{
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) return rrule->byMonthDays();
else return TQValueList<int>();
}
// Emulate the old behavior
TQValueList<RecurrenceRule::WDayPos> Recurrence::monthPositions() const
{
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) return rrule->byDays();
else return TQValueList<RecurrenceRule::WDayPos>();
}
// YEARLY
TQValueList<int> Recurrence::yearDays() const
{
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) return rrule->byYearDays();
else return TQValueList<int>();
}
TQValueList<int> Recurrence::yearDates() const
{
return monthDays();
}
TQValueList<int> Recurrence::yearMonths() const
{
RecurrenceRule *rrule = defaultRRuleConst();
if ( rrule ) return rrule->byMonths();
else return TQValueList<int>();
}
TQValueList<RecurrenceRule::WDayPos> Recurrence::yearPositions() const
{
return monthPositions();
}
RecurrenceRule *Recurrence::setNewRecurrenceType( RecurrenceRule::PeriodType type, int freq )
{
if ( mRecurReadOnly || freq <= 0 ) return 0;
mRRules.clearAll();
updated();
RecurrenceRule *rrule = defaultRRule( true );
if ( !rrule ) return 0;
rrule->setRecurrenceType( type );
rrule->setFrequency( freq );
rrule->setDuration( -1 );
return rrule;
}
void Recurrence::setMinutely( int _rFreq )
{
if ( setNewRecurrenceType( RecurrenceRule::rMinutely, _rFreq ) )
updated();
}
void Recurrence::setHourly( int _rFreq )
{
if ( setNewRecurrenceType( RecurrenceRule::rHourly, _rFreq ) )
updated();
}
void Recurrence::setDaily( int _rFreq )
{
if ( setNewRecurrenceType( RecurrenceRule::rDaily, _rFreq ) )
updated();
}
void Recurrence::setWeekly( int freq, int weekStart )
{
RecurrenceRule *rrule = setNewRecurrenceType( RecurrenceRule::rWeekly, freq );
if ( !rrule ) return;
rrule->setWeekStart( weekStart );
updated();
}
void Recurrence::setWeekly( int freq, const TQBitArray &days, int weekStart )
{
setWeekly( freq, weekStart );
addMonthlyPos( 0, days );
}
void Recurrence::addWeeklyDays( const TQBitArray &days )
{
addMonthlyPos( 0, days );
}
void Recurrence::setMonthly( int freq )
{
if ( setNewRecurrenceType( RecurrenceRule::rMonthly, freq ) )
updated();
}
void Recurrence::addMonthlyPos( short pos, const TQBitArray &days )
{
// Allow 53 for yearly!
if ( mRecurReadOnly || pos > 53 || pos < -53 ) return;
RecurrenceRule *rrule = defaultRRule( false );
if ( !rrule ) return;
bool changed = false;
TQValueList<RecurrenceRule::WDayPos> positions = rrule->byDays();
for ( int i = 0; i < 7; ++i ) {
if ( days.testBit(i) ) {
RecurrenceRule::WDayPos p( pos, i + 1 );
if ( !positions.contains( p ) ) {
changed = true;
positions.append( p );
}
}
}
if ( changed ) {
rrule->setByDays( positions );
updated();
}
}
void Recurrence::addMonthlyPos( short pos, ushort day )
{
// Allow 53 for yearly!
if ( mRecurReadOnly || pos > 53 || pos < -53 ) return;
RecurrenceRule *rrule = defaultRRule( false );
if ( !rrule ) return;
TQValueList<RecurrenceRule::WDayPos> positions = rrule->byDays();
RecurrenceRule::WDayPos p( pos, day );
if ( !positions.contains( p ) ) {
positions.append( p );
rrule->setByDays( positions );
updated();
}
}
void Recurrence::addMonthlyDate( short day )
{
if ( mRecurReadOnly || day > 31 || day < -31 ) return;
RecurrenceRule *rrule = defaultRRule( true );
if ( !rrule ) return;
TQValueList<int> monthDays = rrule->byMonthDays();
if ( !monthDays.contains( day ) ) {
monthDays.append( day );
rrule->setByMonthDays( monthDays );
updated();
}
}
void Recurrence::setYearly( int freq )
{
if ( setNewRecurrenceType( RecurrenceRule::rYearly, freq ) )
updated();
}
// Daynumber within year
void Recurrence::addYearlyDay( int day )
{
RecurrenceRule *rrule = defaultRRule( false ); // It must already exist!
if ( !rrule ) return;
TQValueList<int> days = rrule->byYearDays();
if ( !days.contains( day ) ) {
days << day;
rrule->setByYearDays( days );
updated();
}
}
// day part of date within year
void Recurrence::addYearlyDate( int day )
{
addMonthlyDate( day );
}
// day part of date within year, given as position (n-th weekday)
void Recurrence::addYearlyPos( short pos, const TQBitArray &days )
{
addMonthlyPos( pos, days );
}
// month part of date within year
void Recurrence::addYearlyMonth( short month )
{
if ( mRecurReadOnly || month < 1 || month > 12 ) return;
RecurrenceRule *rrule = defaultRRule( false );
if ( !rrule ) return;
TQValueList<int> months = rrule->byMonths();
if ( !months.contains(month) ) {
months << month;
rrule->setByMonths( months );
updated();
}
}
TimeList Recurrence::recurTimesOn( const TQDate &date ) const
{
TimeList times;
// The whole day is excepted
if ( mExDates.contains( date ) ) return times;
// EXRULE takes precedence over RDATE entries, so for floating events,
// a matching excule also excludes the whole day automatically
if ( doesFloat() ) {
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
if ( (*rr)->recursOn( date ) )
return times;
}
}
if ( startDate() == date ) times << startDateTime().time();
bool foundDate = false;
for ( DateTimeList::ConstIterator it = mRDateTimes.begin();
it != mRDateTimes.end(); ++it ) {
if ( (*it).date() == date ) {
times << (*it).time();
foundDate = true;
} else if (foundDate) break; // <= Assume that the rdatetime list is sorted
}
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
times += (*rr)->recurTimesOn( date );
}
qSortUnique( times );
foundDate = false;
TimeList extimes;
for ( DateTimeList::ConstIterator it = mExDateTimes.begin();
it != mExDateTimes.end(); ++it ) {
if ( (*it).date() == date ) {
extimes << (*it).time();
foundDate = true;
} else if (foundDate) break;
}
if ( !doesFloat() ) { // we have already checked floating times above
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
extimes += (*rr)->recurTimesOn( date );
}
}
qSortUnique( extimes );
for ( TimeList::Iterator it = extimes.begin(); it != extimes.end(); ++it ) {
times.remove( (*it) );
}
return times;
}
TQDateTime Recurrence::getNextDateTime( const TQDateTime &preDateTime ) const
{
//kdDebug(5800) << " Recurrence::getNextDateTime after " << preDateTime << endl;
TQDateTime nextDT = preDateTime;
// prevent infinite loops, e.g. when an exrule extinguishes an rrule (e.g.
// the exrule is identical to the rrule). If an occurrence is found, break
// out of the loop by returning that QDateTime
// TODO_Recurrence: Is a loop counter of 1000 really okay? I mean for secondly
// recurrence, an exdate might exclude more than 1000 intervals!
int loop = 0;
while ( loop < 1000 ) {
// Outline of the algo:
// 1) Find the next date/time after preDateTime when the event could recur
// 1.0) Add the start date if it's after preDateTime
// 1.1) Use the next occurrence from the explicit RDATE lists
// 1.2) Add the next recurrence for each of the RRULEs
// 2) Take the earliest recurrence of these = TQDateTime nextDT
// 3) If that date/time is not excluded, either explicitly by an EXDATE or
// by an EXRULE, return nextDT as the next date/time of the recurrence
// 4) If it's excluded, start all at 1), but starting at nextDT (instead
// of preDateTime). Loop at most 1000 times.
++loop;
// First, get the next recurrence from the RDate lists
DateTimeList dates;
if ( nextDT < startDateTime() ) dates << startDateTime();
DateTimeList::ConstIterator it = mRDateTimes.begin();
// Assume that the rdatetime list is sorted
while ( it != mRDateTimes.end() && (*it) <= nextDT ) ++it;
if ( it != mRDateTimes.end() ) dates << (*it);
/*kdDebug(5800) << " nextDT: " << nextDT << ", startDT: " << startDateTime() << endl;
kdDebug(5800) << " getNextDateTime: found " << dates.count() << " RDATES and DTSTART in loop " << loop << endl;*/
DateList::ConstIterator dit = mRDates.begin();
while ( dit != mRDates.end() && TQDateTime( (*dit), startDateTime().time() ) <= nextDT ) ++dit;
if ( dit != mRDates.end() ) dates << TQDateTime( (*dit), startDateTime().time() );
// Add the next occurrences from all RRULEs.
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
TQDateTime dt = (*rr)->getNextDate( nextDT );
if ( dt.isValid() ) dates << dt;
}
// Take the first of these (all others can't be used later on)
qSortUnique( dates );
// kdDebug(5800) << " getNextDateTime: found " << dates.count() << " dates in loop " << loop << endl;
if ( dates.isEmpty() ) return TQDateTime();
nextDT = dates.first();
// Check if that date/time is excluded explicitly or by an exrule:
if ( !mExDates.contains( nextDT.date() ) && !mExDateTimes.contains( nextDT ) ) {
// kdDebug(5800) << " NextDT" << nextDT << " not excluded by EXDATE " << endl;
bool allowed = true;
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
allowed = allowed && !( (*rr)->recursAt( nextDT ) );
}
// kdDebug(5800) << " NextDT " << nextDT << ", allowed=" << allowed << endl;
if ( allowed ) return nextDT;
}
}
// Couldn't find a valid occurrences in 1000 loops, something is wrong!
return TQDateTime();
}
TQDateTime Recurrence::getPreviousDateTime( const TQDateTime &afterDateTime ) const
{
TQDateTime prevDT = afterDateTime;
// prevent infinite loops, e.g. when an exrule extinguishes an rrule (e.g.
// the exrule is identical to the rrule). If an occurrence is found, break
// out of the loop by returning that QDateTime
int loop = 0;
while ( loop < 1000 ) {
// Outline of the algo:
// 1) Find the next date/time after preDateTime when the event could recur
// 1.1) Use the next occurrence from the explicit RDATE lists
// 1.2) Add the next recurrence for each of the RRULEs
// 2) Take the earliest recurrence of these = TQDateTime nextDT
// 3) If that date/time is not excluded, either explicitly by an EXDATE or
// by an EXRULE, return nextDT as the next date/time of the recurrence
// 4) If it's excluded, start all at 1), but starting at nextDT (instead
// of preDateTime). Loop at most 1000 times.
++loop;
// First, get the next recurrence from the RDate lists
DateTimeList dates;
if ( prevDT > startDateTime() ) dates << startDateTime();
DateTimeList::ConstIterator dtit = mRDateTimes.end();
if ( dtit != mRDateTimes.begin() ) {
do {
--dtit;
} while ( dtit != mRDateTimes.begin() && (*dtit) >= prevDT );
if ( (*dtit) < prevDT ) dates << (*dtit);
}
DateList::ConstIterator dit = mRDates.end();
if ( dit != mRDates.begin() ) {
do {
--dit;
} while ( dit != mRDates.begin() && TQDateTime((*dit), startDateTime().time()) >= prevDT );
if ( TQDateTime((*dit), startDateTime().time()) < prevDT )
dates << TQDateTime( (*dit), startDateTime().time() );
}
// Add the previous occurrences from all RRULEs.
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
TQDateTime dt = (*rr)->getPreviousDate( prevDT );
if ( dt.isValid() ) dates << dt;
}
//kdDebug(5800) << " getPreviousDateTime: found " << dates.count() << " dates in loop " << loop << endl;
// Take the last of these (all others can't be used later on)
qSortUnique( dates );
if ( dates.isEmpty() ) return TQDateTime();
prevDT = dates.last();
// Check if that date/time is excluded explicitly or by an exrule:
if ( !mExDates.contains( prevDT.date() ) && !mExDateTimes.contains( prevDT ) ) {
bool allowed = true;
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
allowed = allowed && !( (*rr)->recursAt( prevDT ) );
}
if ( allowed ) return prevDT;
}
}
// Couldn't find a valid occurrences in 1000 loops, something is wrong!
return TQDateTime();
}
/***************************** PROTECTED FUNCTIONS ***************************/
RecurrenceRule::List Recurrence::rRules() const
{
return mRRules;
}
void Recurrence::addRRule( RecurrenceRule *rrule )
{
if ( mRecurReadOnly || !rrule ) return;
rrule->setFloats( mFloating );
mRRules.append( rrule );
rrule->addObserver( this );
updated();
}
void Recurrence::removeRRule( RecurrenceRule *rrule )
{
if (mRecurReadOnly) return;
mRRules.remove( rrule );
rrule->removeObserver( this );
updated();
}
RecurrenceRule::List Recurrence::exRules() const
{
return mExRules;
}
void Recurrence::addExRule( RecurrenceRule *exrule )
{
if ( mRecurReadOnly || !exrule ) return;
exrule->setFloats( mFloating );
mExRules.append( exrule );
exrule->addObserver( this );
updated();
}
void Recurrence::removeExRule( RecurrenceRule *exrule )
{
if (mRecurReadOnly) return;
mExRules.remove( exrule );
exrule->removeObserver( this );
updated();
}
DateTimeList Recurrence::rDateTimes() const
{
return mRDateTimes;
}
void Recurrence::setRDateTimes( const DateTimeList &rdates )
{
if ( mRecurReadOnly ) return;
mRDateTimes = rdates;
qSortUnique( mRDateTimes );
updated();
}
void Recurrence::addRDateTime( const TQDateTime &rdate )
{
if ( mRecurReadOnly ) return;
mRDateTimes.append( rdate );
qSortUnique( mRDateTimes );
updated();
}
DateList Recurrence::rDates() const
{
return mRDates;
}
void Recurrence::setRDates( const DateList &rdates )
{
if ( mRecurReadOnly ) return;
mRDates = rdates;
qSortUnique( mRDates );
updated();
}
void Recurrence::addRDate( const TQDate &rdate )
{
if ( mRecurReadOnly ) return;
mRDates.append( rdate );
qSortUnique( mRDates );
updated();
}
DateTimeList Recurrence::exDateTimes() const
{
return mExDateTimes;
}
void Recurrence::setExDateTimes( const DateTimeList &exdates )
{
if ( mRecurReadOnly ) return;
mExDateTimes = exdates;
qSortUnique( mExDateTimes );
}
void Recurrence::addExDateTime( const TQDateTime &exdate )
{
if ( mRecurReadOnly ) return;
mExDateTimes.append( exdate );
qSortUnique( mExDateTimes );
updated();
}
DateList Recurrence::exDates() const
{
return mExDates;
}
void Recurrence::setExDates( const DateList &exdates )
{
if ( mRecurReadOnly ) return;
mExDates = exdates;
qSortUnique( mExDates );
updated();
}
void Recurrence::addExDate( const TQDate &exdate )
{
if ( mRecurReadOnly ) return;
mExDates.append( exdate );
qSortUnique( mExDates );
updated();
}
void Recurrence::recurrenceChanged( RecurrenceRule * )
{
updated();
}
// %%%%%%%%%%%%%%%%%% end:Recurrencerule %%%%%%%%%%%%%%%%%%
void Recurrence::dump() const
{
kdDebug(5800) << "Recurrence::dump():" << endl;
kdDebug(5800) << " -) " << mRRules.count() << " RRULEs: " << endl;
for ( RecurrenceRule::List::ConstIterator rr = mRRules.begin(); rr != mRRules.end(); ++rr ) {
kdDebug(5800) << " -) RecurrenceRule : " << endl;
(*rr)->dump();
}
kdDebug(5800) << " -) " << mExRules.count() << " EXRULEs: " << endl;
for ( RecurrenceRule::List::ConstIterator rr = mExRules.begin(); rr != mExRules.end(); ++rr ) {
kdDebug(5800) << " -) ExceptionRule : " << endl;
(*rr)->dump();
}
kdDebug(5800) << endl << " -) " << mRDates.count() << " Recurrence Dates: " << endl;
for ( DateList::ConstIterator it = mRDates.begin(); it != mRDates.end(); ++it ) {
kdDebug(5800) << " " << (*it) << endl;
}
kdDebug(5800) << endl << " -) " << mRDateTimes.count() << " Recurrence Date/Times: " << endl;
for ( DateTimeList::ConstIterator it = mRDateTimes.begin(); it != mRDateTimes.end(); ++it ) {
kdDebug(5800) << " " << (*it) << endl;
}
kdDebug(5800) << endl << " -) " << mExDates.count() << " Exceptions Dates: " << endl;
for ( DateList::ConstIterator it = mExDates.begin(); it != mExDates.end(); ++it ) {
kdDebug(5800) << " " << (*it) << endl;
}
kdDebug(5800) << endl << " -) " << mExDateTimes.count() << " Exception Date/Times: " << endl;
for ( DateTimeList::ConstIterator it = mExDateTimes.begin(); it != mExDateTimes.end(); ++it ) {
kdDebug(5800) << " " << (*it) << endl;
}
}
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