8 files changed, 830 insertions, 20 deletions

diff --git a/libopie2/opiepim/backend/ocontactaccessbackend_vcard.cpp b/libopie2/opiepim/backend/ocontactaccessbackend_vcard.cpp
index 622d40a..e537269 100644
--- a/libopie2/opiepim/backend/ocontactaccessbackend_vcard.cpp
+++ b/libopie2/opiepim/backend/ocontactaccessbackend_vcard.cpp
@@ -17,6 +17,15 @@
  * =====================================================================
  * History:
  * $Log$
+ * Revision 1.8  2003/02/21 16:52:49  zecke
+ * -Remove old Todo classes they're deprecated and today I already using the
+ * new API
+ * -Guard against self assignment in OTodo
+ * -Add test apps for OPIM
+ * -Opiefied Event classes
+ * -Added TimeZone handling and pinning of TimeZones to OEvent
+ * -Adjust ORecur and the widget to better timezone behaviour
+ *
  * Revision 1.7  2003/02/16 22:25:46  zecke
  * 0000276 Fix for that bug.. or better temp workaround
  * A Preferred Number is HOME|VOICE
@@ -74,7 +83,7 @@ bool OContactAccessBackend_VCard::load ()
 
         VObject* obj = 0l;
 
-        if ( QFile( m_file ).exists() ){
+        if ( QFile::exists(m_file) ){
                 obj = Parse_MIME_FromFileName( QFile::encodeName(m_file).data() );
                 if ( !obj )
                         return false;
diff --git a/libopie2/opiepim/core/orecur.cpp b/libopie2/opiepim/core/orecur.cpp
index daf3506..e6a4787 100644
--- a/libopie2/opiepim/core/orecur.cpp
+++ b/libopie2/opiepim/core/orecur.cpp
@@ -10,17 +10,17 @@ struct ORecur::Data : public QShared {
         freq = -1;
         days = 0;
         pos = 0;
-        create = -1;
+        create = QDateTime::currentDateTime();
         hasEnd = FALSE;
-        end = 0;
+        end = QDate::currentDate();
     }
     char days; // Q_UINT8 for 8 seven days;)
     ORecur::RepeatType type;
     int freq;
     int pos;
     bool hasEnd : 1;
-    time_t end;
-    time_t create;
+    QDate end;
+    QDateTime create;
     int rep;
     QString app;
     ExceptionList list;
@@ -52,6 +52,8 @@ bool ORecur::operator==( const ORecur& )const {
     return false;
 }
 ORecur &ORecur::operator=( const ORecur& re) {
+    if ( *this == re ) return *this;
+
     re.data->ref();
     deref();
     data = re.data;
@@ -366,15 +368,12 @@ bool ORecur::hasEndDate()const {
     return data->hasEnd;
 }
 QDate ORecur::endDate()const {
-    return TimeConversion::fromUTC( data->end ).date();
+    return data->end;
 }
 QDate ORecur::start()const{
     return data->start;
 }
-time_t ORecur::endDateUTC()const {
-    return data->end;
-}
-time_t ORecur::createTime()const {
+QDateTime ORecur::createdDateTime()const {
     return data->create;
 }
 int ORecur::repetition()const {
@@ -404,13 +403,9 @@ void ORecur::setDays( char c ) {
 }
 void ORecur::setEndDate( const QDate& dt) {
     checkOrModify();
-    data->end = TimeConversion::toUTC( dt );
-}
-void ORecur::setEndDateUTC( time_t t) {
-    checkOrModify();
-    data->end = t;
+    data->end = dt;
 }
-void ORecur::setCreateTime( time_t t) {
+void ORecur::setCreatedDateTime( const QDateTime& t) {
     checkOrModify();
     data->create = t;
 }
diff --git a/libopie2/opiepim/core/orecur.h b/libopie2/opiepim/core/orecur.h
index 8713d97..1e0014b 100644
--- a/libopie2/opiepim/core/orecur.h
+++ b/libopie2/opiepim/core/orecur.h
@@ -35,13 +35,18 @@ public:
     bool hasEndDate()const;
     QDate start()const;
     QDate endDate()const;
-    time_t endDateUTC()const;
-    time_t createTime()const;
+    QDateTime createdDateTime()const;
+    /**
+     * starting on monday=0, sunday=6
+     * for convience
+     */
+    bool repeatOnWeekDay( int day )const;
 
     /**
      * FromWhereToStart is not included!!!
      */
     bool nextOcurrence( const QDate& FromWhereToStart, QDate &recurDate );
+
     /**
      * The module this ORecur belongs to
      */
@@ -63,8 +68,7 @@ public:
     void setDays( char c);
     void setEndDate( const QDate& dt );
     void setStart( const QDate& dt );
-    void setEndDateUTC( time_t );
-    void setCreateTime( time_t );
+    void setCreatedDateTime( const QDateTime& );
     void setHasEndDate( bool b );
     void setRepitition(int );
 
diff --git a/libopie2/opiepim/core/otimezone.cpp b/libopie2/opiepim/core/otimezone.cpp
new file mode 100644
index 0000000..b2bd3aa
--- a/dev/null
+++ b/libopie2/opiepim/core/otimezone.cpp
@@ -0,0 +1,104 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <sys/types.h>
+
+#include "otimezone.h"
+
+namespace {
+
+    QDateTime utcTime( time_t t) {
+        tm* broken = ::gmtime( &t );
+        QDateTime ret;
+        ret.setDate( QDate( broken->tm_year + 1900, broken->tm_mon +1, broken->tm_mday ) );
+        ret.setTime( QTime( broken->tm_hour, broken->tm_min, broken->tm_sec ) );
+        return ret;
+    }
+    QDateTime utcTime( time_t t, const QString&  zone) {
+        QCString org = ::getenv( "TZ" );
+        ::setenv( "TZ", zone.latin1(), true );
+        ::tzset();
+
+        tm* broken = ::localtime( &t );
+        ::setenv( "TZ", org, true );
+
+        QDateTime ret;
+        ret.setDate( QDate( broken->tm_year + 1900, broken->tm_mon +1, broken->tm_mday ) );
+        ret.setTime( QTime( broken->tm_hour, broken->tm_min, broken->tm_sec ) );
+
+        return ret;
+    }
+    time_t to_Time_t( const QDateTime& utc, const QString& str ) {
+        QDate d = utc.date();
+        QTime t = utc.time();
+
+        tm broken;
+        broken.tm_year = d.year()  - 1900;
+        broken.tm_mon  = d.month() - 1;
+        broken.tm_mday = d.day();
+        broken.tm_hour = t.hour();
+        broken.tm_min  = t.minute();
+        broken.tm_sec = t.second();
+
+        QCString org = ::getenv( "TZ" );
+        ::setenv( "TZ", str.latin1(), true );
+        ::tzset();
+
+        time_t ti = ::mktime( &broken );
+        ::setenv( "TZ", org, true );
+
+        return ti;
+    }
+}
+OTimeZone::OTimeZone( const ZoneName& zone )
+    : m_name(zone) {
+}
+OTimeZone::~OTimeZone() {
+}
+
+bool OTimeZone::isValid()const {
+    return !m_name.isEmpty();
+}
+
+/*
+ * we will get the current timezone
+ * and ask it to convert to the timezone date
+ */
+QDateTime OTimeZone::toLocalDateTime( const QDateTime& dt) {
+    return OTimeZone::current().toDateTime( dt, *this );
+}
+QDateTime OTimeZone::toUTCDateTime( const QDateTime& dt ) {
+    return OTimeZone::utc().toDateTime( dt, *this );
+}
+QDateTime OTimeZone::fromUTCDateTime( time_t t) {
+    return utcTime( t );
+}
+QDateTime OTimeZone::toDateTime( time_t t) {
+    return utcTime( t, m_name );
+}
+/*
+ * convert dt to utc using zone.m_name
+ * convert utc -> timeZoneDT using this->m_name
+ */
+QDateTime OTimeZone::toDateTime( const QDateTime& dt, const OTimeZone& zone ) {
+    time_t utc = to_Time_t( dt, zone.m_name );
+    qWarning("%d %s", utc, zone.m_name.latin1() );
+    return utcTime( utc, m_name );
+}
+time_t OTimeZone::fromDateTime( const QDateTime& time ) {
+    return to_Time_t( time, m_name );
+}
+time_t OTimeZone::fromUTCDateTime( const QDateTime& time ) {
+    return to_Time_t( time, "UTC" );
+}
+OTimeZone OTimeZone::current() {
+    QCString str = ::getenv("TZ");
+    OTimeZone zone( str );
+    return zone;
+}
+OTimeZone OTimeZone::utc() {
+    return OTimeZone("UTC");
+}
+QString OTimeZone::timeZone()const {
+    return m_name;
+}
diff --git a/libopie2/opiepim/core/otimezone.h b/libopie2/opiepim/core/otimezone.h
new file mode 100644
index 0000000..bb08349
--- a/dev/null
+++ b/libopie2/opiepim/core/otimezone.h
@@ -0,0 +1,71 @@
+#ifndef OPIE_TIME_ZONE_H
+#define OPIE_TIME_ZONE_H
+
+#include <time.h>
+#include <qdatetime.h>
+
+/**
+ * A very primitive class to convert time
+ * from one timezone to another
+ * and to localtime
+ * and time_t
+ */
+class OTimeZone {
+ public:
+    typedef QString ZoneName;
+    OTimeZone( const ZoneName&  = ZoneName::null );
+    virtual ~OTimeZone(); // just in case.
+
+    bool isValid()const;
+
+    /**
+     * converts the QDateTime to a DateTime
+     * in the local timezone
+     * if QDateTime is 25th Jan and takes place in Europe/Berlin at 12h
+     * and the current timezone is Europe/London the returned
+     * time will be 11h.
+     */
+    QDateTime toLocalDateTime( const QDateTime& dt );
+
+    /**
+     * converts the QDateTime to UTC time
+     */
+    QDateTime toUTCDateTime( const QDateTime& dt );
+
+    /**
+     * reads the time_t into a QDateTime using UTC as timezone!
+     */
+    QDateTime fromUTCDateTime( time_t );
+
+    /**
+     * converts the time_t to the time in the timezone
+     */
+    QDateTime toDateTime( time_t );
+
+    /**
+     * converts the QDateTime from one timezone to this timeZone
+     */
+    QDateTime toDateTime( const QDateTime&, const OTimeZone& timeZone );
+
+    /**
+     * converts the date time into a time_t. It takes the timezone into account
+     */
+    time_t fromDateTime( const QDateTime& );
+
+    /**
+     * converts the datetime with timezone UTC
+     */
+    time_t fromUTCDateTime( const QDateTime& );
+
+    static OTimeZone current();
+    static OTimeZone utc();
+
+    QString timeZone()const;
+ private:
+    ZoneName m_name;
+    class Private;
+    Private* d;
+};
+
+
+#endif
diff --git a/libopie2/opiepim/oevent.cpp b/libopie2/opiepim/oevent.cpp
new file mode 100644
index 0000000..71b9441
--- a/dev/null
+++ b/libopie2/opiepim/oevent.cpp
@@ -0,0 +1,427 @@
+#include <qshared.h>
+
+#include <qpe/palmtopuidgen.h>
+#include <qpe/categories.h>
+
+#include "orecur.h"
+#include "opimresolver.h"
+#include "opimnotifymanager.h"
+
+#include "oevent.h"
+
+namespace OCalendarHelper {
+    static int week( const QDate& date) {
+        // Calculates the week this date is in within that
+        // month. Equals the "row" is is in in the month view
+        int week = 1;
+        QDate tmp( date.year(), date.month(), 1 );
+        if ( date.dayOfWeek() < tmp.dayOfWeek() )
+            ++week;
+
+        week += ( date.day() - 1 ) / 7;
+
+        return week;
+    }
+    static int occurence( const QDate& date) {
+        // calculates the number of occurrances of this day of the
+        // week till the given date (e.g 3rd Wednesday of the month)
+        return ( date.day() - 1 ) / 7 + 1;
+    }
+    static int dayOfWeek( char day ) {
+        int dayOfWeek = 1;
+        char i = ORecur::MON;
+        while ( !( i & day ) && i <= ORecur::SUN ) {
+            i <<= 1;
+            ++dayOfWeek;
+        }
+        return dayOfWeek;
+    }
+    static int monthDiff( const QDate& first, const QDate& second ) {
+        return ( second.year() - first.year() ) * 12 +
+            second.month() - first.month();
+    }
+}
+
+struct OEvent::Data : public QShared {
+    Data() : QShared() {
+        recur = 0;
+        manager = 0;
+        isAllDay = false;
+    }
+    ~Data() {
+        delete manager;
+        delete recur;
+    }
+    QString description;
+    QString location;
+    OPimNotifyManager* manager;
+    ORecur* recur;
+    QString note;
+    QDateTime created;
+    QDateTime start;
+    QDateTime end;
+    bool isAllDay : 1;
+    QString timezone;
+};
+
+OEvent::OEvent( int uid )
+    : OPimRecord( uid ) {
+    data = new Data;
+}
+OEvent::OEvent( const OEvent& ev)
+    : OPimRecord( ev ), data( ev.data )
+{
+    data->ref();
+}
+OEvent::~OEvent() {
+    if ( data->deref() ) {
+        delete data;
+        data = 0;
+    }
+}
+OEvent& OEvent::operator=( const OEvent& ev) {
+    if ( *this == ev ) return  *this;
+
+    OPimRecord::operator=( ev );
+    ev.data->ref();
+    deref();
+    data = ev.data;
+
+
+    return *this;
+}
+QString OEvent::description()const {
+    return data->description;
+}
+void OEvent::setDescription( const QString& description ) {
+    changeOrModify();
+    data->description = description;
+}
+void OEvent::setLocation( const QString& loc ) {
+    changeOrModify();
+    data->location = loc;
+}
+QString OEvent::location()const {
+    return data->location;
+}
+OPimNotifyManager &OEvent::notifiers() {
+    // I hope we can skip the changeOrModify here
+    // the notifier should take care of it
+    // and OPimNotify is shared too
+    if (!data->manager )
+        data->manager = new OPimNotifyManager;
+
+    return *data->manager;
+}
+bool OEvent::hasNotifiers()const {
+    return  ( data->manager);
+}
+ORecur OEvent::recurrence()const {
+    if (!data->recur)
+        data->recur = new ORecur;
+
+    return *data->recur;
+}
+void OEvent::setRecurrence( const ORecur& rec) {
+    changeOrModify();
+    if (data->recur )
+        (*data->recur) = rec;
+    else
+        data->recur = new ORecur( rec );
+}
+bool OEvent::hasRecurrence()const {
+    return data->recur;
+}
+QString OEvent::note()const {
+    return data->note;
+}
+void OEvent::setNote( const QString& note ) {
+    changeOrModify();
+    data->note = note;
+}
+QDateTime OEvent::createdDateTime()const {
+    return data->created;
+}
+void OEvent::setCreatedDateTime( const QDateTime& time ) {
+    changeOrModify();
+    data->created = time;
+}
+QDateTime OEvent::startDateTime()const {
+    if ( data->isAllDay )
+        return QDateTime( data->start.date(), QTime(0, 0, 0 ) );
+    return data->start;
+}
+QDateTime OEvent::startDateTimeInZone()const {
+    /* if no timezone, or all day event or if the current and this timeZone match... */
+    if (data->timezone.isEmpty() || data->isAllDay || data->timezone == OTimeZone::current().timeZone() ) return startDateTime();
+
+    OTimeZone zone(data->timezone  );
+    return zone.toDateTime( data->start, OTimeZone::current() );
+}
+void OEvent::setStartDateTime( const QDateTime& dt ) {
+    changeOrModify();
+    data->start = dt;
+}
+QDateTime OEvent::endDateTime()const {
+    /*
+     * if all Day event the end time needs
+     * to be on the same day as the start
+     */
+    if ( data->isAllDay )
+        return QDateTime( data->start.date(), QTime(23, 59, 59 ) );
+    return data->end;
+}
+QDateTime OEvent::endDateTimeInZone()const {
+    /* if no timezone, or all day event or if the current and this timeZone match... */
+    if (data->timezone.isEmpty() || data->isAllDay || data->timezone == OTimeZone::current().timeZone() ) return endDateTime();
+
+    OTimeZone zone(data->timezone  );
+    return zone.toDateTime( data->end, OTimeZone::current() );
+}
+void OEvent::setEndDateTime( const QDateTime& dt ) {
+    changeOrModify();
+    data->end =    dt;
+}
+bool OEvent::isMultipleDay()const {
+    return data->end.date().day() - data->start.date().day();
+}
+bool OEvent::isAllDay()const {
+    return data->isAllDay;
+}
+void OEvent::setTimeZone( const QString& tz ) {
+    changeOrModify();
+    data->timezone = tz;
+}
+QString OEvent::timeZone()const {
+    return data->timezone;
+}
+bool OEvent::match( const QRegExp& )const {
+    // FIXME
+    return false;
+}
+QString OEvent::toRichText()const {
+    // FIXME
+    return "OEvent test";
+}
+QString OEvent::toShortText()const {
+    return "OEvent shotText";
+}
+QString OEvent::type()const {
+    return QString::fromLatin1("OEvent");
+}
+QString OEvent::recordField( int /*id */ )const {
+    return QString::null;
+}
+int OEvent::rtti() {
+    return OPimResolver::DateBook;
+}
+bool OEvent::loadFromStream( QDataStream& ) {
+    return true;
+}
+bool OEvent::saveToStream( QDataStream& )const {
+    return true;
+}
+void OEvent::changeOrModify() {
+    if ( data->count != 1 ) {
+        data->deref();
+        Data* d2 = new Data;
+        d2->description = data->description;
+        d2->location = data->location;
+        d2->manager = data->manager;
+        d2->recur = data->recur;
+        d2->note = data->note;
+        d2->created = data->created;
+        d2->start = data->start;
+        d2->end = data->end;
+        d2->isAllDay = data->isAllDay;
+        d2->timezone = data->timezone;
+
+        data = d2;
+    }
+}
+void OEvent::deref() {
+    if ( data->deref() ) {
+        delete data;
+        data = 0;
+    }
+}
+// FIXME
+QMap<int, QString> OEvent::toMap()const {
+    return QMap<int, QString>();
+}
+QMap<QString, QString> OEvent::toExtraMap()const {
+    return QMap<QString, QString>();
+}
+
+
+struct OEffectiveEvent::Data : public QShared {
+    Data() : QShared() {
+    }
+    OEvent event;
+    QDate date;
+    QTime start, end;
+    QDate startDate, endDate;
+    bool dates : 1;
+};
+
+OEffectiveEvent::OEffectiveEvent() {
+    data = new Data;
+    data->date = QDate::currentDate();
+    data->start = data->end = QTime::currentTime();
+    data->dates = false;
+}
+OEffectiveEvent::OEffectiveEvent( const OEvent& ev, const QDate& startDate,
+                                  Position pos ) {
+    data = new Data;
+    data->event = ev;
+    data->date = startDate;
+    if ( pos & Start )
+        data->start = ev.startDateTime().time();
+    else
+        data->start = QTime( 0, 0, 0 );
+
+    if ( pos & End )
+        data->end = ev.endDateTime().time();
+    else
+        data->end = QTime( 23, 59, 59 );
+
+    data->dates = false;
+}
+OEffectiveEvent::OEffectiveEvent( const OEffectiveEvent& ev) {
+    data = ev.data;
+    data->ref();
+}
+OEffectiveEvent::~OEffectiveEvent() {
+    if ( data->deref() ) {
+        delete data;
+        data = 0;
+    }
+}
+OEffectiveEvent& OEffectiveEvent::operator=( const OEffectiveEvent& ev ) {
+    if ( *this == ev ) return  *this;
+
+    ev.data->ref();
+    deref();
+    data = ev.data;
+
+    return *this;
+}
+
+void OEffectiveEvent::setStartTime( const QTime& ti) {
+    changeOrModify();
+    data->start = ti;
+}
+void OEffectiveEvent::setEndTime( const QTime& en) {
+    changeOrModify();
+    data->end = en;
+}
+void OEffectiveEvent::setEvent( const OEvent& ev) {
+    changeOrModify();
+    data->event = ev;
+}
+void OEffectiveEvent::setDate( const QDate& da) {
+    changeOrModify();
+    data->date = da;
+}
+void OEffectiveEvent::setEffectiveDates( const QDate& from,
+                                         const QDate& to ) {
+    if (!from.isValid() ) {
+        data->dates = false;
+        return;
+    }
+
+    data->startDate = from;
+    data->endDate = to;
+}
+QString OEffectiveEvent::description()const {
+    return data->event.description();
+}
+QString OEffectiveEvent::location()const {
+    return data->event.location();
+}
+QString OEffectiveEvent::note()const {
+    return data->event.note();
+}
+OEvent OEffectiveEvent::event()const {
+    return data->event;
+}
+QTime OEffectiveEvent::startTime()const {
+    return data->start;
+}
+QTime OEffectiveEvent::endTime()const {
+    return data->end;
+}
+QDate OEffectiveEvent::date()const {
+    return data->date;
+}
+int OEffectiveEvent::length()const {
+    return (data->end.hour() * 60 - data->start.hour() * 60)
+        + QABS(data->start.minute() - data->end.minute() );
+}
+int OEffectiveEvent::size()const {
+    return ( data->end.hour() - data->start.hour() ) * 3600
+        + (data->end.minute() - data->start.minute() * 60
+        + data->end.second() - data->start.second() );
+}
+QDate OEffectiveEvent::startDate()const {
+    if ( data->dates )
+        return data->startDate;
+    else if ( data->event.hasRecurrence() )  // single day, since multi-day should have a d pointer
+        return data->date;
+    else
+        return data->event.startDateTime().date();
+}
+QDate OEffectiveEvent::endDate()const {
+    if ( data->dates )
+        return data->endDate;
+    else if ( data->event.hasRecurrence() )
+        return data->date;
+    else
+        return data->event.endDateTime().date();
+}
+void OEffectiveEvent::deref() {
+    if ( data->deref() ) {
+        delete data;
+        data = 0;
+    }
+}
+void OEffectiveEvent::changeOrModify() {
+    if ( data->count != 1 ) {
+        data->deref();
+        Data* d2 = new Data;
+        d2->event = data->event;
+        d2->date = data->date;
+        d2->start = data->start;
+        d2->end = data->end;
+        d2->startDate = data->startDate;
+        d2->endDate = data->endDate;
+        d2->dates = data->dates;
+        data = d2;
+    }
+}
+bool OEffectiveEvent::operator<( const OEffectiveEvent &e ) const{
+    if ( data->date < e.date() )
+        return TRUE;
+    if ( data->date == e.date() )
+        return ( startTime() < e.startTime() );
+    else
+        return FALSE;
+}
+bool OEffectiveEvent::operator<=( const OEffectiveEvent &e ) const{
+    return (data->date <= e.date() );
+}
+bool OEffectiveEvent::operator==( const OEffectiveEvent &e ) const {
+    return ( date() == e.date()
+             && startTime() == e.startTime()
+             && endTime()== e.endTime()
+             && event() == e.event() );
+}
+bool OEffectiveEvent::operator!=( const OEffectiveEvent &e ) const {
+    return !(*this == e );
+}
+bool OEffectiveEvent::operator>( const OEffectiveEvent &e ) const {
+    return !(*this <= e );
+}
+bool OEffectiveEvent::operator>= ( const OEffectiveEvent &e ) const {
+    return !(*this < e);
+}
diff --git a/libopie2/opiepim/oevent.h b/libopie2/opiepim/oevent.h
new file mode 100644
index 0000000..4489be7
--- a/dev/null
+++ b/libopie2/opiepim/oevent.h
@@ -0,0 +1,198 @@
+// CONTAINS GPLed code of TT
+
+#ifndef OPIE_PIM_EVENT_H
+#define OPIE_PIM_EVENT_H
+
+#include <qstring.h>
+#include <qdatetime.h>
+#include <qvaluelist.h>
+
+#include <qpe/recordfields.h>
+#include <qpe/palmtopuidgen.h>
+
+#include "otimezone.h"
+#include "opimrecord.h"
+
+namespace OCalendarHelper {
+    /** calculate the week number of the date */
+    static int week( const QDate& );
+    /** calculate the occurence of week days since the start of the month */
+    static int ocurrence( const QDate& );
+
+    // returns the dayOfWeek for the *first* day it finds (ignores
+    // any further days!). Returns 1 (Monday) if there isn't any day found
+    static int dayOfWeek( char day );
+
+    /** returns the diff of month */
+    static int monthDiff( const QDate& first, const QDate& second );
+
+}
+
+class OPimNotifyManager;
+class ORecur;
+class OEvent : public OPimRecord {
+public:
+    typedef QValueList<OEvent> ValueList;
+    enum RecordFields {
+        Uid = Qtopia::UID_ID,
+        Category = Qtopia::CATEGORY_ID,
+        Description,
+        Location,
+        Alarm,
+        Reminder,
+        Recurrence,
+        Note,
+        Created,
+        StartDate,
+        EndDate,
+        AllDay,
+        TimeZone
+    };
+
+    OEvent(int uid = 0);
+    OEvent( const OEvent& );
+    ~OEvent();
+    OEvent &operator=( const OEvent& );
+
+    QString description()const;
+    void setDescription( const QString& description );
+
+    QString location()const;
+    void setLocation( const QString& loc );
+
+    bool hasNotifiers()const;
+    OPimNotifyManager &notifiers();
+
+    ORecur recurrence()const;
+    void setRecurrence( const ORecur& );
+    bool hasRecurrence()const;
+
+    QString note()const;
+    void setNote( const QString& note );
+
+
+    QDateTime createdDateTime()const;
+    void setCreatedDateTime( const QDateTime& dt);
+
+    /** set the date to dt. dt is the QDateTime in localtime */
+    void setStartDateTime( const QDateTime& );
+    /** returns the datetime in the local timeZone */
+    QDateTime startDateTime()const;
+
+    /** returns the start datetime in the current zone */
+    QDateTime startDateTimeInZone()const;
+
+    /** in current timezone */
+    void setEndDateTime( const QDateTime& );
+    /** in current timezone */
+    QDateTime endDateTime()const;
+    QDateTime endDateTimeInZone()const;
+
+    bool isMultipleDay()const;
+    bool isAllDay()const;
+    void setAllDay( bool isAllDay );
+
+    /* pin this event to a timezone! FIXME */
+    void setTimeZone( const QString& timeZone );
+    QString timeZone()const;
+
+
+    bool match( const QRegExp& )const;
+
+
+
+
+    /* needed reimp */
+    QString toRichText()const;
+    QString toShortText()const;
+    QString type()const;
+
+    QMap<int, QString> toMap()const;
+    QMap<QString, QString> toExtraMap()const;
+    QString recordField(int )const;
+
+    static int rtti();
+
+    bool loadFromStream( QDataStream& );
+    bool saveToStream( QDataStream& )const;
+
+/*    bool operator==( const OEvent& );
+    bool operator!=( const OEvent& );
+    bool operator<( const OEvent& );
+    bool operator<=( const OEvent& );
+    bool operator>( const OEvent& );
+    bool operator>=(const OEvent& );
+*/
+private:
+    inline void changeOrModify();
+    void deref();
+    struct Data;
+    Data* data;
+    class Private;
+    Private* priv;
+
+};
+
+/**
+ * AN Event can span through multiple days. We split up a multiday eve
+ */
+
+class OEffectiveEvent {
+public:
+    QValueList<OEffectiveEvent> ValueList;
+    enum Position { MidWay, Start, End, StartEnd };
+        // If we calculate the effective event of a multi-day event
+    // we have to figure out whether we are at the first day,
+    // at the end, or anywhere else ("middle"). This is important
+    // for the start/end times (00:00/23:59)
+    // MidWay: 00:00 -> 23:59, as we are "in the middle" of a multi-
+    //         day event
+    // Start: start time -> 23:59
+    // End: 00:00 -> end time
+    // Start | End == StartEnd: for single-day events (default)
+    //                          here we draw start time -> end time
+    OEffectiveEvent();
+    OEffectiveEvent( const OEvent& event, const QDate& startDate, Position pos = StartEnd );
+    OEffectiveEvent( const OEffectiveEvent& );
+    OEffectiveEvent &operator=(const OEffectiveEvent& );
+    ~OEffectiveEvent();
+
+    void setStartTime( const QTime& );
+    void setEndTime( const QTime& );
+    void setEvent( const OEvent& );
+    void setDate( const QDate& );
+
+    void setEffectiveDates( const QDate& from, const QDate& to );
+
+    QString description()const;
+    QString location()const;
+    QString note()const;
+    OEvent event()const;
+    QTime startTime()const;
+    QTime endTime()const;
+    QDate date()const;
+
+    /* return the length in hours */
+    int length()const;
+    int size()const;
+
+    QDate startDate()const;
+    QDate endDate()const;
+
+    bool operator<( const OEffectiveEvent &e ) const;
+    bool operator<=( const OEffectiveEvent &e ) const;
+    bool operator==( const OEffectiveEvent &e ) const;
+    bool operator!=( const OEffectiveEvent &e ) const;
+    bool operator>( const OEffectiveEvent &e ) const;
+    bool operator>= ( const OEffectiveEvent &e ) const;
+
+private:
+    void deref();
+    inline void changeOrModify();
+    class Private;
+    Private* priv;
+    struct Data;
+    Data* data;
+
+};
+#endif
diff --git a/libopie2/opiepim/otodo.cpp b/libopie2/opiepim/otodo.cpp
index b4d4aa9..049359e 100644
--- a/libopie2/opiepim/otodo.cpp
+++ b/libopie2/opiepim/otodo.cpp
@@ -340,6 +340,8 @@ void OTodo::deref() {
 }
 OTodo &OTodo::operator=(const OTodo &item )
 {
+    if ( *this == item ) return *this;
+
     OPimRecord::operator=( item );
     //qWarning("operator= ref ");
     item.data->ref();