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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples 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 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

** 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 qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include <QtScript/QScriptClassPropertyIterator>

#include <QtScript/QScriptEngine>

#include "bytearrayclass.h"

#include "bytearrayprototype.h"

#include <stdlib.h>

Q_DECLARE_METATYPE(QByteArray*)

Q_DECLARE_METATYPE(ByteArrayClass*)

class ByteArrayClassPropertyIterator : public QScriptClassPropertyIterator

{

public:

    ByteArrayClassPropertyIterator(const QScriptValue &object);

    ~ByteArrayClassPropertyIterator();

    bool hasNext() const;

    void next();

    bool hasPrevious() const;

    void previous();

    void toFront();

    void toBack();

    QScriptString name() const;

    uint id() const;

private:

    int m_index;

    int m_last;

};

static qint32 toArrayIndex(const QString &str)

{

    QByteArray bytes = str.toUtf8();

    char *eptr;

    quint32 pos = strtoul(bytes.constData(), &eptr, 10);

    if ((eptr == bytes.constData() + bytes.size())

        && (QByteArray::number(pos) == bytes)) {

        return pos;

    }

    return -1;

}

//! [0]

ByteArrayClass::ByteArrayClass(QScriptEngine *engine)

    : QObject(engine), QScriptClass(engine)

{

    qScriptRegisterMetaType<QByteArray>(engine, toScriptValue, fromScriptValue);

    length = engine->toStringHandle(QLatin1String("length"));

    proto = engine->newQObject(new ByteArrayPrototype(this),

                               QScriptEngine::QtOwnership,

                               QScriptEngine::SkipMethodsInEnumeration

                               | QScriptEngine::ExcludeSuperClassMethods

                               | QScriptEngine::ExcludeSuperClassProperties);

    QScriptValue global = engine->globalObject();

    proto.setPrototype(global.property("Object").property("prototype"));

    ctor = engine->newFunction(construct, proto);

    ctor.setData(qScriptValueFromValue(engine, this));

}

//! [0]

ByteArrayClass::~ByteArrayClass()

{

}

//! [3]

QScriptClass::QueryFlags ByteArrayClass::queryProperty(const QScriptValue &object,

                                                       const QScriptString &name,

                                                       QueryFlags flags, uint *id)

{

    QByteArray *ba = qscriptvalue_cast<QByteArray*>(object.data());

    if (!ba)

        return 0;

    if (name == length) {

        return flags;

    } else {

        qint32 pos = toArrayIndex(name);

        if (pos == -1)

            return 0;

        *id = pos;

        if ((flags & HandlesReadAccess) && (pos >= ba->size()))

            flags &= ~HandlesReadAccess;

        return flags;

    }

}

//! [3]

//! [4]

QScriptValue ByteArrayClass::property(const QScriptValue &object,

                                      const QScriptString &name, uint id)

{

    QByteArray *ba = qscriptvalue_cast<QByteArray*>(object.data());

    if (!ba)

        return QScriptValue();

    if (name == length) {

        return ba->length();

    } else {

        qint32 pos = id;

        if ((pos < 0) || (pos >= ba->size()))

            return QScriptValue();

        return uint(ba->at(pos)) & 255;

    }

    return QScriptValue();

}

//! [4]

//! [5]

void ByteArrayClass::setProperty(QScriptValue &object,

                                 const QScriptString &name,

                                 uint id, const QScriptValue &value)

{

    QByteArray *ba = qscriptvalue_cast<QByteArray*>(object.data());

    if (!ba)

        return;

    if (name == length) {

        ba->resize(value.toInt32());

    } else {

        qint32 pos = id;

        if (pos < 0)

            return;

        if (ba->size() <= pos)

            ba->resize(pos + 1);

        (*ba)[pos] = char(value.toInt32());

    }

}

//! [5]

//! [6]

QScriptValue::PropertyFlags ByteArrayClass::propertyFlags(

    const QScriptValue &/*object*/, const QScriptString &name, uint /*id*/)

{

    if (name == length) {

        return QScriptValue::Undeletable

            | QScriptValue::SkipInEnumeration;

    }

    return QScriptValue::Undeletable;

}

//! [6]

//! [7]

QScriptClassPropertyIterator *ByteArrayClass::newIterator(const QScriptValue &object)

{

    return new ByteArrayClassPropertyIterator(object);

}

//! [7]

QString ByteArrayClass::name() const

{

    return QLatin1String("ByteArray");

}

QScriptValue ByteArrayClass::prototype() const

{

    return proto;

}

QScriptValue ByteArrayClass::constructor()

{

    return ctor;

}

QScriptValue ByteArrayClass::newInstance(int size)

{

    return newInstance(QByteArray(size, /*ch=*/0));

}

//! [1]

QScriptValue ByteArrayClass::newInstance(const QByteArray &ba)

{

    QScriptValue data = engine()->newVariant(qVariantFromValue(ba));

    return engine()->newObject(this, data);

}

//! [1]

//! [2]

QScriptValue ByteArrayClass::construct(QScriptContext *ctx, QScriptEngine *)

{

    ByteArrayClass *cls = qscriptvalue_cast<ByteArrayClass*>(ctx->callee().data());

    if (!cls)

        return QScriptValue();

    QScriptValue arg = ctx->argument(0);

    if (arg.instanceOf(ctx->callee()))

        return cls->newInstance(qscriptvalue_cast<QByteArray>(arg));

    int size = arg.toInt32();

    return cls->newInstance(size);

}

//! [2]

QScriptValue ByteArrayClass::toScriptValue(QScriptEngine *eng, const QByteArray &ba)

{

    QScriptValue ctor = eng->globalObject().property("ByteArray");

    ByteArrayClass *cls = qscriptvalue_cast<ByteArrayClass*>(ctor.data());

    if (!cls)

        return eng->newVariant(qVariantFromValue(ba));

    return cls->newInstance(ba);

}

void ByteArrayClass::fromScriptValue(const QScriptValue &obj, QByteArray &ba)

{

    ba = qvariant_cast<QByteArray>(obj.data().toVariant());

}

ByteArrayClassPropertyIterator::ByteArrayClassPropertyIterator(const QScriptValue &object)

    : QScriptClassPropertyIterator(object)

{

    toFront();

}

ByteArrayClassPropertyIterator::~ByteArrayClassPropertyIterator()

{

}

//! [8]

bool ByteArrayClassPropertyIterator::hasNext() const

{

    QByteArray *ba = qscriptvalue_cast<QByteArray*>(object().data());

    return m_index < ba->size();

}

void ByteArrayClassPropertyIterator::next()

{

    m_last = m_index;

    ++m_index;

}

bool ByteArrayClassPropertyIterator::hasPrevious() const

{

    return (m_index > 0);

}

void ByteArrayClassPropertyIterator::previous()

{

    --m_index;

    m_last = m_index;

}

void ByteArrayClassPropertyIterator::toFront()

{

    m_index = 0;

    m_last = -1;

}

void ByteArrayClassPropertyIterator::toBack()

{

    QByteArray *ba = qscriptvalue_cast<QByteArray*>(object().data());

    m_index = ba->size();

    m_last = -1;

}

QScriptString ByteArrayClassPropertyIterator::name() const

{

    return object().engine()->toStringHandle(QString::number(m_last));

}

uint ByteArrayClassPropertyIterator::id() const

{

    return m_last;

}

//! [8]