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33
34#include "qtimezones_p.h"
35
36#include <QtOrganizer/qorganizer.h>
37
38QTORGANIZER_USE_NAMESPACE
39
40QT_BEGIN_NAMESPACE_VERSITORGANIZER
41
42QOrganizerManager* TimeZone::getManager()
43{
44 // We use the memory engine to do time zone recurrence calculations
45 static QOrganizerManager* manager(new QOrganizerManager(QString::fromLatin1(str: "memory")));
46 return manager;
47}
48
49QDateTime TimeZone::convert(const QDateTime& dateTime) const
50{
51 Q_ASSERT(isValid());
52 QOrganizerManager* manager = getManager();
53 int offset = 100000; // impossible value
54 QDateTime latestPhase;
55 foreach(const TimeZonePhase& phase, mPhases) {
56 QOrganizerEvent event;
57 event.setStartDateTime(phase.startDateTime());
58 event.setRecurrenceRules(QSet<QOrganizerRecurrenceRule>() << phase.recurrenceRule());
59 event.setRecurrenceDates(phase.recurrenceDates());
60 QList<QOrganizerItem> occurrences =
61 manager->itemOccurrences(parentItem: event, startDateTime: phase.startDateTime(), endDateTime: dateTime, maxCount: 500);
62 if (!occurrences.isEmpty()) {
63 QDateTime phaseStart(static_cast<const QOrganizerEventOccurrence &>(occurrences.last()).startDateTime());
64 if (phaseStart > latestPhase) {
65 latestPhase = phaseStart;
66 offset = phase.utcOffset();
67 }
68 }
69 else {
70 offset = phase.utcOffset();
71 }
72 }
73 QDateTime retn(dateTime);
74 retn.setTimeSpec(Qt::UTC);
75 if (offset >= -86400 && offset <= 86400) // offset must be within -24hours to +24hours
76 return retn.addSecs(secs: -offset);
77 else
78 return retn;
79}
80
81QDateTime TimeZones::convert(const QDateTime& dateTime, const QString& tzid) const
82{
83 if (!mTimeZones.contains(akey: tzid))
84 return QDateTime();
85 TimeZone tz = mTimeZones.value(akey: tzid);
86 if (!tz.isValid())
87 return QDateTime();
88 return tz.convert(dateTime);
89}
90
91QT_END_NAMESPACE_VERSITORGANIZER
92

source code of qtpim/src/versitorganizer/qtimezones_p.cpp