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

**

** 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.

**

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

#ifndef HBLAYOUTPARAMETERS_P_H

#define HBLAYOUTPARAMETERS_P_H

#include "hbcssparser_p.h"

#include <QString>

#include <QSharedData>

#include <QSharedDataPointer>

class HbDeviceProfile;

struct HbParameterItem

{

    HbParameterItem() : hash(0), valueOffset(0), nameOffset(0), special(false) {}

    HbParameterItem(quint32 hash, qptrdiff valueOffset, qptrdiff nameOffset, bool special) :

            hash(hash), valueOffset(valueOffset), nameOffset(nameOffset), special(special) {}

    quint32 hash;

    qptrdiff valueOffset;

    qptrdiff nameOffset;

    bool special;

};

inline

bool operator < (const HbParameterItem &parameterItem1,

                 const HbParameterItem &parameterItem2)

{

    return parameterItem1.hash < parameterItem2.hash;

}

class HbLayoutParametersPrivate : public QSharedData

{

public:

    typedef const HbParameterItem* const_iterator;

    typedef HbParameterItem* iterator;

public:

    HbLayoutParametersPrivate(const HbParameterItem* begin, qint32 size, 

                              const char* valueBase, const char* nameBase)

        : mBegin(begin), mSize(size), mValueBase(valueBase), mNameBase(nameBase)

      {

      }

    HbLayoutParametersPrivate(const HbLayoutParametersPrivate &other) 

        : QSharedData(other),

          mProfileName(other.mProfileName),

          mSpecialVariables(other.mSpecialVariables),

          mBegin(other.mBegin),

          mSize(other.mSize),

          mValueBase(other.mValueBase),

          mNameBase(other.mNameBase)

          {

          }

public:

    QString mProfileName;

    QVector<HbCss::Value> mSpecialVariables;

    const HbParameterItem *mBegin;

    qint32 mSize;

    const char *mValueBase;

    const char *mNameBase;

};

class HB_CORE_PRIVATE_EXPORT HbLayoutParameters

{

public:

    enum SpecialParameter

    {

        ScreenWidth = 0,

        ScreenHeight,

        ShortEdge,

        LongEdge,

        NumParameters

    };

    typedef HbLayoutParametersPrivate::const_iterator const_iterator;

    typedef HbLayoutParametersPrivate::iterator iterator;

public:

    static QStringList specialVariableNames();

    static QVector<HbCss::Value> specialVariableValues(const HbDeviceProfile &profile);

    HbLayoutParameters();

    HbLayoutParameters(const HbLayoutParameters &other) : d(other.d) {}

    ~HbLayoutParameters() {}

    void init(const HbDeviceProfile &profile);

    bool isEmpty() const { return d->mSize <= 0; }

    QString name(const const_iterator &iterator) const

    {

        return QString(QLatin1String(d->mNameBase + iterator->nameOffset));

    }

    const HbCss::Value &value(const const_iterator &iterator) const

    {

        if (iterator->special) {

            return d->mSpecialVariables.at(iterator->valueOffset);

        }

        const void *valPtr = d->mValueBase + iterator->valueOffset;

        return *static_cast<const HbCss::Value*>(valPtr);

    }

    const_iterator begin() const { return d->mBegin; }

    const_iterator end() const { return d->mBegin + d->mSize; }

    const_iterator constBegin() const { return begin(); }

    const_iterator constEnd() const { return end(); }

    const_iterator find(const QString &parameter) const;

private:

    QSharedDataPointer<HbLayoutParametersPrivate> d;

};

#endif // HBLAYOUTPARAMETERS_P_H