1 /*

     2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)

     3  *  Copyright (C) 2008 Apple Inc. All rights reserved.

     4  *

     5  *  This library is free software; you can redistribute it and/or

     6  *  modify it under the terms of the GNU Lesser General Public

     7  *  License as published by the Free Software Foundation; either

     8  *  version 2 of the License, or (at your option) any later version.

     9  *

    10  *  This library is distributed in the hope that it will be useful,

    11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  *  Lesser General Public License for more details.

    14  *

    15  *  You should have received a copy of the GNU Lesser General Public

    16  *  License along with this library; if not, write to the Free Software

    17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    18  *

    19  */

    20 

    21 #ifndef DateInstance_h

    22 #define DateInstance_h

    23 

    24 #include "JSWrapperObject.h"

    25 

    26 namespace WTF {

    27     struct GregorianDateTime;

    28 }

    29 

    30 namespace JSC {

    31 

    32     class DateInstance : public JSWrapperObject {

    33     public:

    34         DateInstance(ExecState*, double);

    35         DateInstance(ExecState*, NonNullPassRefPtr<Structure>, double);

    36         explicit DateInstance(ExecState*, NonNullPassRefPtr<Structure>);

    37 

    38         double internalNumber() const { return internalValue().uncheckedGetNumber(); }

    39 

    40         static JS_EXPORTDATA const ClassInfo info;

    41 

    42         const GregorianDateTime* gregorianDateTime(ExecState* exec) const

    43         {

    44             if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())

    45                 return &m_data->m_cachedGregorianDateTime;

    46             return calculateGregorianDateTime(exec);

    47         }

    48         

    49         const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const

    50         {

    51             if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())

    52                 return &m_data->m_cachedGregorianDateTimeUTC;

    53             return calculateGregorianDateTimeUTC(exec);

    54         }

    55 

    56         static PassRefPtr<Structure> createStructure(JSValue prototype)

    57         {

    58             return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount);

    59         }

    60 

    61     protected:

    62         static const unsigned StructureFlags = OverridesMarkChildren | JSWrapperObject::StructureFlags;

    63 

    64     private:

    65         const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;

    66         const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;

    67         virtual const ClassInfo* classInfo() const { return &info; }

    68 

    69         mutable RefPtr<DateInstanceData> m_data;

    70     };

    71 

    72     DateInstance* asDateInstance(JSValue);

    73 

    74     inline DateInstance* asDateInstance(JSValue value)

    75     {

    76         ASSERT(asObject(value)->inherits(&DateInstance::info));

    77         return static_cast<DateInstance*>(asObject(value));

    78     }

    79 

    80 } // namespace JSC

    81 

    82 #endif // DateInstance_h