98      * @param array $offsets  A TZ offset hash
103     public static function getSyncTZFromOffsets(array $offsets)  argument
106             $offsets['bias'] = Horde_Mapi::chbo($offsets['bias']);
107             $offsets['stdbias'] = Horde_Mapi::chbo($offsets['stdbias']);
108             $offsets['dstbias'] = Horde_Mapi::chbo($offsets['dstbias']);
112 …offsets['bias'], '', 0, $offsets['stdmonth'], $offsets['stdday'], $offsets['stdweek'], $offsets['s…
113 …offsets['stdbias'], '', 0, $offsets['dstmonth'], $offsets['dstday'], $offsets['dstweek'], $offsets…
114                 $offsets['dstbias']);
129         $offsets = array(
160             $offsets['bias'] = $std['offset'] / 60 * -1;
162                 $offsets = self::_generateOffsetsForTransition($offsets, $std, 'std');
163                 $offsets = self::_generateOffsetsForTransition($offsets, $dst, 'dst');
164                 $offsets['stdhour'] += $dst['offset'] / 3600;
165                 $offsets['dsthour'] += $std['offset'] / 3600;
166                 $offsets['dstbias'] = ($dst['offset'] - $std['offset']) / 60 * -1;
170         return $offsets;
223      * @param array $offsets      A TZ offset hash
229 …  protected static function _generateOffsetsForTransition(array $offsets, array $transition, $type)  argument
238         $offsets[$type . 'month'] = $transitionDate->format('n');
239         $offsets[$type . 'day'] = $transitionDate->format('w');
240         $offsets[$type . 'minute'] = (int)$transitionDate->format('i');
241         $offsets[$type . 'hour'] = (int)$transitionDate->format('H');
244                 $offsets[$type . 'week'] = $i;
249         return $offsets;
263      * @param array|string $offsets     The timezone to check. Either an array
270     public function getTimezone($offsets, $expectedTimezone = null)  argument
272         $timezones = $this->getListOfTimezones($offsets, $expectedTimezone);
284      * @param array|string $offsets     Either an offset array, or a AS timezone
290     public function getListOfTimezones($offsets, $expectedTimezone = null)  argument
292         if (is_string($offsets)) {
293             $offsets = self::getOffsetsFromSyncTZ($offsets);
295         $this->_setDefaultStartDate($offsets);
299             if (false !== ($matchingTransition = $this->_checkTimezone($timezone, $offsets))) {
322      * @param array $offsets  Offsets may be avaluated for a given start year
324     protected function _setDefaultStartDate(array $offsets = null)  argument
330         if (!empty($offsets['stdyear'])) {
331             $this->_startDate = new Horde_Date($offsets['stdyear'] . '-01-01');
344      * @param array $offsets          The offsets to check.
349     protected function _checkTimezone(DateTimeZone $timezone, array $offsets)  argument
352         if ($this->_checkTransition($std, $dst, $offsets)) {
365      * @param array $offsets  The offsets to check.
369     protected function _checkTransition(array $std, array $dst, array $offsets)  argument
371         if (empty($std) || empty($offsets)) {
375         $standardOffset = ($offsets['bias'] + $offsets['stdbias']) * 60 * -1;
380             if ((empty($offsets['dstmonth']) && (empty($dst) || empty($dst['isdst']))) ||
381                 (empty($dst) && !empty($offsets['dstmonth']))) {
385             $daylightOffset = ($offsets['bias'] + $offsets['dstbias']) * 60 * -1;
387 …          $daylightOffsetMilestone = ($offsets['dstbias'] + ($offsets['dstbias'] * -1) ) * 60 * -1;
393                 if ($standardParsed->format('n') == $offsets['stdmonth'] &&
394                     $daylightParsed->format('n') == $offsets['dstmonth'] &&
395                     $standardParsed->format('w') == $offsets['stdday'] &&
396                     $daylightParsed->format('w') == $offsets['dstday'])
398                     return self::_isNthOcurrenceOfWeekdayInMonth($dst['ts'], $offsets['dstweek']) &&
399                            self::_isNthOcurrenceOfWeekdayInMonth($std['ts'], $offsets['stdweek']);