/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include "hbvariant_p.h"

#include <QVariant>

#include <QDebug>

#include "hbmemoryutils_p.h"

#include "hbstring_p.h"

#include "hbsmartoffset_p.h"

/**

 * detach

 * used to support implicit sharing

 */

void HbVariant::detach()

{

    HbVariantData *data = getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared);

    if( data->mRef > 1 || mShared == true ) {

        if( data->mRef > 1 ) {

            data->mRef.deref();

        }

        GET_MEMORY_MANAGER(mMemoryType);

        HbSmartOffset offset(manager->alloc(sizeof(HbVariantData)), mMemoryType);

        HbVariantData *newData = new((char*)manager->base() + offset.get()) HbVariantData();

        newData->mData = data->mData;

            HbSmartOffset dataOffset(manager->alloc( data->stringSize*sizeof(QChar)));

            ::memcpy(HbMemoryUtils::getAddress<char>(mMemoryType, dataOffset.get()),

                getAddress<char>(mMemoryType, data->mData.offset, mShared),

                data->stringSize * sizeof(QChar));

            newData->stringSize = data->stringSize;

            newData->mData.offset = dataOffset.release();

            HbSmartOffset dataOffset(manager->alloc(sizeof(QColor)));

            new (HbMemoryUtils::getAddress<QColor>(mMemoryType, dataOffset.get()))

                    QColor(*getAddress<QColor>(mMemoryType, data->mData.offset, mShared));

            newData->mData.offset = dataOffset.release();

        }

        mDataOffset = offset.release();

        mShared = false;

    }

}

/*

* C'tor

*/

HbVariant::HbVariant( HbMemoryManager::MemoryType type )

    : mMemoryType( type ), mShared( false )

{

    initializeData();

}

/*

* C'tor taking int

*/

HbVariant::HbVariant( int val, HbMemoryManager::MemoryType type )

    : mMemoryType( type ), mShared( false )

{

    HbVariantData * data = initializeData();

    if(data){

        data->mData.i = val;

    }

}

/*

* C'tor taking double

*/

HbVariant::HbVariant( double val, HbMemoryManager::MemoryType type )

    : mMemoryType( type ),mShared( false )

{

    HbVariantData * data = initializeData();

    if(data){

        data->mData.d = val;

    }

}

/*

* C'tor taking Qstring

*/

HbVariant::HbVariant( const QString &str, HbMemoryManager::MemoryType type )

    : mMemoryType( type ), mShared( false )

{

    initializeData();

    fillStringData(str.constData(), str.length());

}

/*

* C'tor taking string

*/

HbVariant::HbVariant( const char *val, HbMemoryManager::MemoryType type )

    : mMemoryType( type ), mShared( false )

{

    initializeData();

    QString str = QString::fromAscii(val);

    fillStringData(str.constData(), str.length());

}

/*

* C'tor taking QColor

*/

HbVariant::HbVariant( const QColor &col, HbMemoryManager::MemoryType type )

    : mMemoryType(type), mShared(false)

{

    initializeData();

    fillColorData(col);

}

/*

* copy C'tor

*/

HbVariant::HbVariant( const HbVariant &other )

{

    mMemoryType = other.mMemoryType;

    GET_MEMORY_MANAGER(other.mMemoryType)

    HbVariantData* data = HbMemoryUtils::getAddress<HbVariantData>( mMemoryType, other.mDataOffset );

    mDataOffset = other.mDataOffset;

    if ( !manager->isWritable() || other.mShared == true ) {

        mShared = true;

        mMemoryType = HbMemoryManager::HeapMemory;

    } else {

        mShared = false;

        data->mRef.ref();

    }    

    Q_ASSERT( mMemoryType == HbMemoryManager::SharedMemory 

            || mMemoryType == HbMemoryManager::HeapMemory );

}

/*

* D'tor

*/

HbVariant::~HbVariant()

{

    GET_MEMORY_MANAGER(mMemoryType);

    // if the memory where the variant is not writable it means it's client process, so do nothing

    if( !manager->isWritable() ) 

        return;

    HbVariantData *data= getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared );

    if( mShared != true && !data->mRef.deref() ) {

        clear();

        HbMemoryUtils::freeMemory( mMemoryType, mDataOffset );

    }

}

/*

* to convert to int

*/

int HbVariant::toInt() const

{

    HbVariantData *data = getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared );

    case HbVariant::Int:

        return data->mData.i;

    case HbVariant::Double:

        return int(data->mData.d);

    case HbVariant::String:

        return int(getString().toLongLong());

    case HbVariant::Color:

    case HbVariant::StringList:

        return 0;

    default:

        return 0;

    }

}

/*

* to convert to string

*/

QString HbVariant::toString() const

{

    HbVariantData *data = getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared );

    case HbVariant::Int:

        return QString::number(data->mData.i);

    case HbVariant::Double:

        return QString::number(data->mData.d);

    case HbVariant::String:

        return getString();

    case HbVariant::Color:

        return getColor().name();

    case HbVariant::StringList:

        return QString();

    default:

        return QString();

    }

}

/*

* to get QString

*/

QString HbVariant::getString() const

{

    HbVariantData *data = getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared );

    if (data->mData.offset != -1) { 

        QChar* dataPtr = getAddress<QChar>( mMemoryType, data->mData.offset, mShared );

        return QString::fromRawData( dataPtr, data->stringSize );

    } else { // data->mData.offset == -1 is empty String Variant.

        return QString("");

    }

}

/*

* to get QColor

*/

QColor HbVariant::toColor() const

{

    HbVariantData *data = getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared );

    case HbVariant::String: {

        QColor col = QColor();

        col.setNamedColor(getString());

        return col;

        }

    case HbVariant::Color:

        return getColor();

    case HbVariant::StringList:

    case HbVariant::Int:

    case HbVariant::Double:

        return QColor();

    default:

        return QColor();

    }

}

/*

* to get QColor

*/

QColor HbVariant::getColor() const

{

    HbVariantData *data = getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared );

    return *( getAddress<QColor>(mMemoryType, data->mData.offset, mShared) );

}

/*

* to get stringlist

*/

QStringList HbVariant::toStringList () const

{

    // ToDo: Implement it

    return QStringList();

}

/*

* to get double 

*/

double HbVariant::toDouble() const

{

    HbVariantData *data = getAddress<HbVariantData>( mMemoryType, mDataOffset, mShared );

    case HbVariant::Int:

        return double(data->mData.i);

    case HbVariant::Double:

        return data->mData.d;

    case HbVariant::String:

        return double(getString().toDouble());

    case HbVariant::Color:

    case HbVariant::StringList:

        return double();

    default:

        return double();

    }

}

/*

* initializeData 

*/

HbVariant::HbVariantData * HbVariant::initializeData()

{

    GET_MEMORY_MANAGER(mMemoryType);

    mDataOffset = -1;

    mDataOffset = manager->alloc(sizeof(HbVariantData));

    HbVariantData *data = getAddress<HbVariantData>(mMemoryType, mDataOffset, mShared);

    return new(data) HbVariantData();

}

/*

* fillStringData 

*/

void HbVariant::fillStringData(const QChar *str, int size)

{

    GET_MEMORY_MANAGER(mMemoryType);

    HbVariantData *data = getAddress<HbVariantData>(mMemoryType, mDataOffset, mShared);

    int oldOffset = reservesMemory(data) ? data->mData.offset : -1;

    if (size == 0) {

        data->mData.offset = -1;

    } else {

        // allocate memory and copy data.

        int allocBytes = size * sizeof(QChar);

        data->mData.offset = manager->alloc(allocBytes);

        memcpy(getAddress<char>(mMemoryType, data->mData.offset, mShared),

                                str, allocBytes);

    }

    data->stringSize = size;

    if (oldOffset != -1) {

        //clean old string data when assigned with a new string value

        HbMemoryUtils::freeMemory(mMemoryType, oldOffset);

    }

}

/*

* fillColorData 

*/

void HbVariant::fillColorData( const QColor &col )

{

    GET_MEMORY_MANAGER(mMemoryType);

    HbVariantData *data = getAddress<HbVariantData>(mMemoryType, mDataOffset, mShared);

    int oldOffset = reservesMemory(data) ? data->mData.offset : -1;

        oldOffset = -1; //use the preallocated memory.

    } else {

        data->mData.offset = manager->alloc(sizeof(QColor));

    }

    new (getAddress<char>(mMemoryType, data->mData.offset, mShared)) QColor(col);

    if (oldOffset != -1) {

        HbMemoryUtils::freeMemory(mMemoryType, oldOffset);

    }

}

/*

* = operator taking int 

*/

HbVariant& HbVariant::operator=(int val)

{

    detach(); // This will update the mDataOffset to new location if ref > 1.

    HbVariantData *data = getAddress<HbVariantData>(mMemoryType, mDataOffset, mShared);

    freeMemory(data);

    data->mData.i = val;

    return *this;

}

/*

* = operator taking double 

*/

HbVariant& HbVariant::operator=(double val)

{

    detach(); // This will update the mDataOffset to new location if ref > 1.

    HbVariantData *data = getAddress<HbVariantData>(mMemoryType, mDataOffset, mShared);

    freeMemory(data);

    data->mData.d = val;

    return *this;

}

/*

* = operator taking QString 

*/

HbVariant& HbVariant::operator=(const QString& val)

{

    detach(); // This will update the mDataOffset to new location if ref > 1.

    fillStringData(val.constData(), val.length());

    return *this;

}

/*

* = operator taking HbString 

*/

HbVariant& HbVariant::operator=(const HbString& val)

{

    detach(); // This will update the mDataOffset to new location if ref > 1.

    fillStringData(val.constData(), val.length());

    return *this;

}

/*

* = operator taking QColor 

*/

HbVariant& HbVariant::operator=(const QColor& col)

{

    detach(); // This will update the mDataOffset to new location if ref > 1.

    fillColorData(col);

    return *this;

}

/*

* = operator taking QStringList 

*/

HbVariant& HbVariant::operator=(const QStringList& /*strList*/)

{

    // ToDo: Implement it

    return *this;

}

/*

* = operator taking HbVariant 

*/

HbVariant& HbVariant::operator=(const HbVariant &other)

{

    GET_MEMORY_MANAGER(mMemoryType)

    if(!manager->isWritable()) {

        Q_ASSERT(false);

    }

    HbVariantData *otherData = getAddress<HbVariantData>(other.mMemoryType, other.mDataOffset, other.mShared);