Long live Qt 4.5!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef Patternist_AbstractDateTime_H
+#define Patternist_AbstractDateTime_H
+
+#include <QDateTime>
+#include <QRegExp>
+
+#include "qitem_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    /**
+     * @short Base class for classes implementing values related to time, date or both.
+     *
+     * @see <a href="http://www.w3.org/TR/xmlschema-2/#dateTime">XML Schema
+     * Part 2: Datatypes Second Edition, 3.2.7 dateTime</a>
+     * @see <a href="http://www.w3.org/TR/xpath-datamodel/#dates-and-times">XQuery
+     * 1.0 and XPath 2.0 Data Model (XDM), 3.3.2 Dates and Times</a>
+     * @see <a href="http://www.cl.cam.ac.uk/~mgk25/iso-time.html">A summary of
+     * the international standard date and time notation, Markus Kuhn</a>
+     * @see <a href="http://en.wikipedia.org/wiki/Iso_date">ISO 8601,
+     * From Wikipedia, the free encyclopedia</a>
+     * @author Frans Englich <fenglich@trolltech.com>
+     * @ingroup Patternist_xdm
+     */
+    class AbstractDateTime : public AtomicValue
+    {
+    public:
+        typedef QExplicitlySharedDataPointer<AbstractDateTime> Ptr;
+
+        AbstractDateTime(const QDateTime &dateTime);
+
+        enum
+        {
+            DefaultYear     = 2000,
+            DefaultMonth    = 1,
+            DefaultDay      = 1
+        };
+
+        /**
+         * @returns the date time this class represents, as a QDateTime.
+         */
+        inline const QDateTime &toDateTime() const
+        {
+            return m_dateTime;
+        }
+
+
+        /**
+         * @short Acts as a mapping table for AbstractDateTime::create()
+         * and describes where certain fields in a QRegExp pattern can be found
+         * for a particular W3C XML Schema date/time type.
+         *
+         * @author Frans Englich <fenglich@trolltech.com>
+         * @ingroup Patternist_xdm
+         */
+        class CaptureTable
+        {
+        public:
+            CaptureTable(const QRegExp &exp,
+                         const qint8 zoneOffsetSignP,
+                         const qint8 zoneOffsetHourP,
+                         const qint8 zoneOffsetMinuteP,
+                         const qint8 zoneOffsetUTCSymbolP,
+                         const qint8 yearP,
+                         const qint8 monthP = -1,
+                         const qint8 dayP = -1,
+                         const qint8 hourP = -1,
+                         const qint8 minutesP = -1,
+                         const qint8 secondsP = -1,
+                         const qint8 msecondsP = -1,
+                         const qint8 yearSignP = -1) : regExp(exp)
+                                                     , zoneOffsetSign(zoneOffsetSignP)
+                                                     , zoneOffsetHour(zoneOffsetHourP)
+                                                     , zoneOffsetMinute(zoneOffsetMinuteP)
+                                                     , zoneOffsetUTCSymbol(zoneOffsetUTCSymbolP)
+                                                     , year(yearP)
+                                                     , month(monthP)
+                                                     , day(dayP)
+                                                     , hour(hourP)
+                                                     , minutes(minutesP)
+                                                     , seconds(secondsP)
+                                                     , mseconds(msecondsP)
+                                                     , yearSign(yearSignP)
+            {
+                Q_ASSERT(exp.isValid());
+            }
+
+            const QRegExp regExp;
+            const qint8 zoneOffsetSign;
+            const qint8 zoneOffsetHour;
+            const qint8 zoneOffsetMinute;
+            const qint8 zoneOffsetUTCSymbol;
+            const qint8 year;
+            const qint8 month;
+            const qint8 day;
+            const qint8 hour;
+            const qint8 minutes;
+            const qint8 seconds;
+            const qint8 mseconds;
+            const qint8 yearSign;
+
+        private:
+            Q_DISABLE_COPY(CaptureTable)
+        };
+
+        /**
+         * @returns m_dateTime's time part converted to string. This is for
+         * example "12" or "01.023".
+         */
+        QString timeToString() const;
+
+        /**
+         * @returns m_dateTime's date part converted to string. This is for
+         * example "2004-05-12" or "-2004-05-12".
+         */
+        QString dateToString() const;
+
+        /**
+         * Serializes the milli seconds @p msecs into a string representation. For
+         * example, if @p msecs is 1, ".001" is returned; if @p msecs is 100 then
+         * is ".1" returned.
+         */
+        static QString serializeMSeconds(const MSecondProperty msecs);
+
+        /**
+         * A factory function for creating instances that are of the dynamic
+         * type of this class, that represents @p dt.
+         *
+         * The default implementation performs an assert() call. This function
+         * is not pure virtual because all sub-classes do not use it.
+         */
+        virtual Item fromValue(const QDateTime &dt) const;
+
+        /**
+         * Determines whether @p dt is a date-time that can be represented,
+         * and isn't too early or too late. If it is valid, @c true is returned. Otherwise,
+         * @c false is returned and @p message is set to contain a translated message for
+         * human consumption, describing the error.
+         */
+        static bool isRangeValid(const QDate &date,
+                                 QString &message);
+
+    protected:
+
+        /**
+         * @returns m_dateTime' zone offset converted to string, as per the
+         * the W3C XML Schema types. This is for
+         * example "Z" or "+12.00"(depending on m_dateTime).
+         */
+        QString zoneOffsetToString() const;
+
+        static QDateTime create(AtomicValue::Ptr &errorMessage,
+                                const QString &lexicalSource,
+                                const CaptureTable &captTable);
+
+        /**
+         * @short Makes the QDateTime::timeSpec() and QDateTime::zoneOffset()
+         * of @p ot * consistent to @p from.
+         */
+        static void copyTimeSpec(const QDateTime &from,
+                                 QDateTime &to);
+
+        const QDateTime m_dateTime;
+
+    private:
+        enum ZoneOffsetParseResult
+        {
+            /**
+             * syntax or logical error was encountered.
+             */
+            Error,
+            /**
+             * It's a valid offset from UTC.
+             */
+            Offset,
+
+            /**
+             * No zone offset was specified, it's an implementation defined zone offset.
+             */
+            LocalTime,
+            UTC
+        };
+
+        /**
+         * @short Parses the zone offset. All types use zone offsets.
+         *
+         * If result is set to Offset, the offset is returned, otherwise
+         * the return value is undefined.
+         *
+         * The offset is in seconds.
+         */
+        static ZOTotal parseZoneOffset(ZoneOffsetParseResult &result,
+                                       const QStringList &capts,
+                                       const CaptureTable &captTable);
+
+        static inline void setUtcOffset(QDateTime &result,
+                                        const ZoneOffsetParseResult zoResult,
+                                        const int zoOffset);
+    };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif