src/xmlpatterns/functions/qtimezonefns.cpp
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     4 ** All rights reserved.
       
     5 ** Contact: Nokia Corporation (qt-info@nokia.com)
       
     6 **
       
     7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:LGPL$
       
    10 ** No Commercial Usage
       
    11 ** This file contains pre-release code and may not be distributed.
       
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    13 ** contained in the Technology Preview License Agreement accompanying
       
    14 ** this package.
       
    15 **
       
    16 ** GNU Lesser General Public License Usage
       
    17 ** Alternatively, this file may be used under the terms of the GNU Lesser
       
    18 ** General Public License version 2.1 as published by the Free Software
       
    19 ** Foundation and appearing in the file LICENSE.LGPL included in the
       
    20 ** packaging of this file.  Please review the following information to
       
    21 ** ensure the GNU Lesser General Public License version 2.1 requirements
       
    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
       
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    24 ** In addition, as a special exception, Nokia gives you certain additional
       
    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
       
    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
       
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    28 ** If you have questions regarding the use of this file, please contact
       
    29 ** Nokia at qt-info@nokia.com.
       
    30 **
       
    31 **
       
    32 **
       
    33 **
       
    34 **
       
    35 **
       
    36 **
       
    37 **
       
    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #include "qabstractdatetime_p.h"
       
    43 #include "qcontextfns_p.h"
       
    44 #include "qdate_p.h"
       
    45 #include "qschemadatetime_p.h"
       
    46 #include "qdaytimeduration_p.h"
       
    47 #include "qpatternistlocale_p.h"
       
    48 #include "qschematime_p.h"
       
    49 
       
    50 #include "qtimezonefns_p.h"
       
    51 
       
    52 QT_BEGIN_NAMESPACE
       
    53 
       
    54 using namespace QPatternist;
       
    55 
       
    56 Item AdjustTimezone::evaluateSingleton(const DynamicContext::Ptr &context) const
       
    57 {
       
    58     enum
       
    59     {
       
    60         /**
       
    61          * The maximum zone offset, @c PT14H, in milli seconds.
       
    62          */
       
    63         MSecLimit = 14 * 60/*M*/ * 60/*S*/ * 1000/*ms*/
       
    64     };
       
    65 
       
    66 
       
    67     const Item arg(m_operands.first()->evaluateSingleton(context));
       
    68     if(!arg)
       
    69         return Item();
       
    70 
       
    71     QDateTime dt(arg.as<AbstractDateTime>()->toDateTime());
       
    72     // TODO DT dt.setDateOnly(false);
       
    73     Q_ASSERT(dt.isValid());
       
    74     DayTimeDuration::Ptr tz;
       
    75 
       
    76     if(m_operands.count() == 2)
       
    77         tz = DayTimeDuration::Ptr(m_operands.at(1)->evaluateSingleton(context).as<DayTimeDuration>());
       
    78     else
       
    79         tz = context->implicitTimezone();
       
    80 
       
    81     if(tz)
       
    82     {
       
    83         const MSecondCountProperty tzMSecs = tz->value();
       
    84 
       
    85         if(tzMSecs % (1000 * 60) != 0)
       
    86         {
       
    87             context->error(QtXmlPatterns::tr("A zone offset must be in the "
       
    88                                              "range %1..%2 inclusive. %3 is "
       
    89                                              "out of range.")
       
    90                            .arg(formatData("-PT14H"))
       
    91                            .arg(formatData("PT14H"))
       
    92                            .arg(formatData(tz->stringValue())),
       
    93                            ReportContext::FODT0003, this);
       
    94             return Item();
       
    95         }
       
    96         else if(tzMSecs > MSecLimit ||
       
    97                 tzMSecs < -MSecLimit)
       
    98         {
       
    99             context->error(QtXmlPatterns::tr("%1 is not a whole number of minutes.")
       
   100                                             .arg(formatData(tz->stringValue())),
       
   101                                        ReportContext::FODT0003, this);
       
   102             return Item();
       
   103         }
       
   104 
       
   105         const SecondCountProperty tzSecs = tzMSecs / 1000;
       
   106 
       
   107         if(dt.timeSpec() == Qt::LocalTime) /* $arg has no time zone. */
       
   108         {
       
   109             /* "If $arg does not have a timezone component and $timezone is not
       
   110              * the empty sequence, then the result is $arg with $timezone as
       
   111              * the timezone component." */
       
   112             //dt.setTimeSpec(QDateTime::Spec(QDateTime::OffsetFromUTC, tzSecs));
       
   113             dt.setUtcOffset(tzSecs);
       
   114             Q_ASSERT(dt.isValid());
       
   115             return createValue(dt);
       
   116         }
       
   117         else
       
   118         {
       
   119             /* "If $arg has a timezone component and $timezone is not the empty sequence,
       
   120              * then the result is an xs:dateTime value with a timezone component of
       
   121              * $timezone that is equal to $arg." */
       
   122             dt = dt.toUTC();
       
   123             dt = dt.addSecs(tzSecs);
       
   124             //dt.setTimeSpec(QDateTime::Spec(QDateTime::OffsetFromUTC, tzSecs));
       
   125             dt.setUtcOffset(tzSecs);
       
   126             Q_ASSERT(dt.isValid());
       
   127             return createValue(dt);
       
   128         }
       
   129     }
       
   130     else
       
   131     { /* $timezone is the empty sequence. */
       
   132         if(dt.timeSpec() == Qt::LocalTime) /* $arg has no time zone. */
       
   133         {
       
   134             /* "If $arg does not have a timezone component and $timezone is
       
   135              * the empty sequence, then the result is $arg." */
       
   136             return arg;
       
   137         }
       
   138         else
       
   139         {
       
   140             /* "If $arg has a timezone component and $timezone is the empty sequence,
       
   141              * then the result is the localized value of $arg without its timezone component." */
       
   142             dt.setTimeSpec(Qt::LocalTime);
       
   143             return createValue(dt);
       
   144         }
       
   145     }
       
   146 }
       
   147 
       
   148 Item AdjustDateTimeToTimezoneFN::createValue(const QDateTime &dt) const
       
   149 {
       
   150     Q_ASSERT(dt.isValid());
       
   151     return DateTime::fromDateTime(dt);
       
   152 }
       
   153 
       
   154 Item AdjustDateToTimezoneFN::createValue(const QDateTime &dt) const
       
   155 {
       
   156     Q_ASSERT(dt.isValid());
       
   157     return Date::fromDateTime(dt);
       
   158 }
       
   159 
       
   160 Item AdjustTimeToTimezoneFN::createValue(const QDateTime &dt) const
       
   161 {
       
   162     Q_ASSERT(dt.isValid());
       
   163     return SchemaTime::fromDateTime(dt);
       
   164 }
       
   165 
       
   166 QT_END_NAMESPACE