/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative 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.
** $QT_END_LICENSE$
**
****************************************************************************/

#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 "qmlstringconverters_p.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 QmlStringConverters::variantFromString(const QString &s)
{
    if (s.isEmpty())
        return QVariant(s);
    if (s.startsWith(QLatin1Char('\'')) && s.endsWith(QLatin1Char('\''))) {
        QString data = s.mid(1, s.length() - 2);
        return QVariant(data);
    } 
    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);
    bool b = boolFromString(s, &ok);
    if (ok) return QVariant(b);
    QVector3D v = vector3DFromString(s, &ok);
    if (ok) return qVariantFromValue(v);

    return QVariant(s);
}

QColor QmlStringConverters::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;
    }
}

//expects input of "x,y"
QPointF QmlStringConverters::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 QmlStringConverters::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 QmlStringConverters::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);
}

bool QmlStringConverters::boolFromString(const QString &str, bool *ok)
{
    if (str.isEmpty() || str == QLatin1String("false") || str == QLatin1String("0")) {
        if (ok)
            *ok = true;
        return false;
    } else if (str == QLatin1String("true") || str == QLatin1String("1")) {
        if (ok)
            *ok = true;
        return true;
    }

    if (ok)
        *ok = false;
    return true;
}

//expects input of "x,y,z"
QVector3D QmlStringConverters::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