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

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

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** This file is part of the QtDeclarative module of the Qt Toolkit.

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** This file contains pre-release code and may not be distributed.

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** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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

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**

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** rights.  These rights are described in the Nokia Qt LGPL Exception

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** $QT_END_LICENSE$

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

#include "private/qdeclarativestringconverters_p.h"

#include <QtGui/qcolor.h>

#include <QtGui/qvector3d.h>

#include <QtCore/qpoint.h>

#include <QtCore/qrect.h>

#include <QtCore/qsize.h>

#include <QtCore/qvariant.h>

#include <QtCore/qdatetime.h>

QT_BEGIN_NAMESPACE

static uchar fromHex(const uchar c, const uchar c2)

{

    uchar rv = 0;

    if (c >= '0' && c <= '9')

        rv += (c - '0') * 16;

    else if (c >= 'A' && c <= 'F')

        rv += (c - 'A' + 10) * 16;

    else if (c >= 'a' && c <= 'f')

        rv += (c - 'a' + 10) * 16;

    if (c2 >= '0' && c2 <= '9')

        rv += (c2 - '0');

    else if (c2 >= 'A' && c2 <= 'F')

        rv += (c2 - 'A' + 10);

    else if (c2 >= 'a' && c2 <= 'f')

        rv += (c2 - 'a' + 10);

    return rv;

}

static uchar fromHex(const QString &s, int idx)

{

    uchar c = s.at(idx).toAscii();

    uchar c2 = s.at(idx + 1).toAscii();

    return fromHex(c, c2);

}

QVariant QDeclarativeStringConverters::variantFromString(const QString &s)

{

    if (s.isEmpty())

        return QVariant(s);

    bool ok = false;

    QRectF r = rectFFromString(s, &ok);

    if (ok) return QVariant(r);

    QColor c = colorFromString(s, &ok);

    if (ok) return QVariant(c);

    QPointF p = pointFFromString(s, &ok);

    if (ok) return QVariant(p);

    QSizeF sz = sizeFFromString(s, &ok);

    if (ok) return QVariant(sz);

    QVector3D v = vector3DFromString(s, &ok);

    if (ok) return qVariantFromValue(v);

    return QVariant(s);

}

QVariant QDeclarativeStringConverters::variantFromString(const QString &s, int preferredType, bool *ok)

{

    switch (preferredType) {

    case QMetaType::Int:

        return QVariant(int(qRound(s.toDouble(ok))));

    case QMetaType::UInt:

        return QVariant(uint(qRound(s.toDouble(ok))));

    case QMetaType::QColor:

        return QVariant::fromValue(colorFromString(s, ok));

    case QMetaType::QDate:

        return QVariant::fromValue(dateFromString(s, ok));

    case QMetaType::QTime:

        return QVariant::fromValue(timeFromString(s, ok));

    case QMetaType::QDateTime:

        return QVariant::fromValue(dateTimeFromString(s, ok));

    case QMetaType::QPointF:

        return QVariant::fromValue(pointFFromString(s, ok));

    case QMetaType::QPoint:

        return QVariant::fromValue(pointFFromString(s, ok).toPoint());

    case QMetaType::QSizeF:

        return QVariant::fromValue(sizeFFromString(s, ok));

    case QMetaType::QSize:

        return QVariant::fromValue(sizeFFromString(s, ok).toSize());

    case QMetaType::QRectF:

        return QVariant::fromValue(rectFFromString(s, ok));

    case QMetaType::QRect:

        return QVariant::fromValue(rectFFromString(s, ok).toRect());

    case QMetaType::QVector3D:

        return QVariant::fromValue(vector3DFromString(s, ok));

    default:

        if (ok) *ok = false;

        return QVariant();

    }

}

QColor QDeclarativeStringConverters::colorFromString(const QString &s, bool *ok)

{

    if (s.startsWith(QLatin1Char('#')) && s.length() == 9) {

        uchar a = fromHex(s, 1);

        uchar r = fromHex(s, 3);

        uchar g = fromHex(s, 5);

        uchar b = fromHex(s, 7);

        if (ok) *ok = true;

        return QColor(r, g, b, a);

    } else {

        QColor rv;

        if (s.startsWith(QLatin1Char('#')) || QColor::colorNames().contains(s.toLower()))

            rv = QColor(s);

        if (ok) *ok = rv.isValid();

        return rv;

    }

}

QDate QDeclarativeStringConverters::dateFromString(const QString &s, bool *ok)

{

    QDate d = QDate::fromString(s, Qt::ISODate);

    if (ok) *ok =  d.isValid();

    return d;

}

QTime QDeclarativeStringConverters::timeFromString(const QString &s, bool *ok)

{

    QTime t = QTime::fromString(s, Qt::ISODate);

    if (ok) *ok = t.isValid();

    return t;

}

QDateTime QDeclarativeStringConverters::dateTimeFromString(const QString &s, bool *ok)

{

    QDateTime d = QDateTime::fromString(s, Qt::ISODate);

    if (ok) *ok =  d.isValid();

    return d;

}

//expects input of "x,y"

QPointF QDeclarativeStringConverters::pointFFromString(const QString &s, bool *ok)

{

    if (s.count(QLatin1Char(',')) != 1) {

        if (ok)

            *ok = false;

        return QPointF();

    }

    bool xGood, yGood;

    int index = s.indexOf(QLatin1Char(','));

    qreal xCoord = s.left(index).toDouble(&xGood);

    qreal yCoord = s.mid(index+1).toDouble(&yGood);

    if (!xGood || !yGood) {

        if (ok)

            *ok = false;

        return QPointF();

    }

    if (ok)

        *ok = true;

    return QPointF(xCoord, yCoord);

}

//expects input of "widthxheight"

QSizeF QDeclarativeStringConverters::sizeFFromString(const QString &s, bool *ok)

{

    if (s.count(QLatin1Char('x')) != 1) {

        if (ok)

            *ok = false;

        return QSizeF();

    }

    bool wGood, hGood;

    int index = s.indexOf(QLatin1Char('x'));

    qreal width = s.left(index).toDouble(&wGood);

    qreal height = s.mid(index+1).toDouble(&hGood);

    if (!wGood || !hGood) {

        if (ok)

            *ok = false;

        return QSizeF();

    }

    if (ok)

        *ok = true;

    return QSizeF(width, height);

}

//expects input of "x,y,widthxheight" //### use space instead of second comma?

QRectF QDeclarativeStringConverters::rectFFromString(const QString &s, bool *ok)

{

    if (s.count(QLatin1Char(',')) != 2 || s.count(QLatin1Char('x')) != 1) {

        if (ok)

            *ok = false;

        return QRectF();

    }

    bool xGood, yGood, wGood, hGood;

    int index = s.indexOf(QLatin1Char(','));

    qreal x = s.left(index).toDouble(&xGood);

    int index2 = s.indexOf(QLatin1Char(','), index+1);

    qreal y = s.mid(index+1, index2-index-1).toDouble(&yGood);

    index = s.indexOf(QLatin1Char('x'), index2+1);

    qreal width = s.mid(index2+1, index-index2-1).toDouble(&wGood);

    qreal height = s.mid(index+1).toDouble(&hGood);

    if (!xGood || !yGood || !wGood || !hGood) {

        if (ok)

            *ok = false;

        return QRectF();

    }

    if (ok)

        *ok = true;

    return QRectF(x, y, width, height);

}

//expects input of "x,y,z"

QVector3D QDeclarativeStringConverters::vector3DFromString(const QString &s, bool *ok)

{

    if (s.count(QLatin1Char(',')) != 2) {

        if (ok)

            *ok = false;

        return QVector3D();

    }

    bool xGood, yGood, zGood;

    int index = s.indexOf(QLatin1Char(','));

    int index2 = s.indexOf(QLatin1Char(','), index+1);

    qreal xCoord = s.left(index).toDouble(&xGood);

    qreal yCoord = s.mid(index+1, index2-index-1).toDouble(&yGood);

    qreal zCoord = s.mid(index2+1).toDouble(&zGood);

    if (!xGood || !yGood || !zGood) {

        if (ok)

            *ok = false;

        return QVector3D();

    }

    if (ok)

        *ok = true;

    return QVector3D(xCoord, yCoord, zCoord);

}

QT_END_NAMESPACE