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** 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
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#include "qv4variantobject_p.h"
#include "qv4functionobject_p.h"
#include "qv4objectproto_p.h"
#include <private/qqmlvaluetypewrapper_p.h>
#include <private/qv8engine_p.h>

QT_BEGIN_NAMESPACE

using namespace QV4;

DEFINE_MANAGED_VTABLE(VariantObject);

VariantObject::VariantObject(InternalClass *ic)
    : Object(ic)
    , ExecutionEngine::ScarceResourceData(QVariant())
    , m_vmePropertyReferenceCount(0)
{
    vtbl = &static_vtbl;
}

VariantObject::VariantObject(ExecutionEngine *engine, const QVariant &value)
    : Object(engine->variantClass)
    , ExecutionEngine::ScarceResourceData(value)
    , m_vmePropertyReferenceCount(0)
{
    vtbl = &static_vtbl;
    if (isScarce())
        internalClass->engine->scarceResources.insert(this);
}

QVariant VariantObject::toVariant(const QV4::Value &v)
{
    if (Object *o = v.asObject())
        return o->engine()->v8Engine->variantFromJS(v);

    if (v.isString())
        return QVariant(v.stringValue()->toQString());
    if (v.isBoolean())
        return QVariant(v.booleanValue());
    if (v.isNumber()) {
        QV4::Value val = v;
        if (val.isInt32())
            return QVariant(val.integerValue());
        return QVariant(v.asDouble());
    }
    if (v.isNull())
        return QVariant(QMetaType::VoidStar, 0);
    assert (v.isUndefined() || v.isEmpty());
    return QVariant();
}

bool VariantObject::isScarce() const
{
    QVariant::Type t = data.type();
    return t == QVariant::Pixmap || t == QVariant::Image;
}

void VariantObject::destroy(Managed *that)
{
    VariantObject *v = static_cast<VariantObject *>(that);
    if (v->isScarce())
        v->node.remove();
    v->~VariantObject();
}

bool VariantObject::isEqualTo(Managed *m, Managed *other)
{
    QV4::VariantObject *lv = m->as<QV4::VariantObject>();
    assert(lv);

    if (QV4::VariantObject *rv = other->as<QV4::VariantObject>())
        return lv->data == rv->data;

    if (QV4::QmlValueTypeWrapper *v = other->as<QmlValueTypeWrapper>())
        return v->isEqual(lv->data);

    return false;
}

void VariantObject::addVmePropertyReference()
{
    if (isScarce() && ++m_vmePropertyReferenceCount == 1) {
        // remove from the ep->scarceResources list
        // since it is now no longer eligible to be
        // released automatically by the engine.
        node.remove();
    }
}

void VariantObject::removeVmePropertyReference()
{
    if (isScarce() && --m_vmePropertyReferenceCount == 0) {
        // and add to the ep->scarceResources list
        // since it is now eligible to be released
        // automatically by the engine.
        internalClass->engine->scarceResources.insert(this);
    }
}


VariantPrototype::VariantPrototype(InternalClass *ic)
    : VariantObject(ic)
{
}

void VariantPrototype::init(ExecutionEngine *engine)
{
    defineDefaultProperty(engine, QStringLiteral("preserve"), method_preserve, 0);
    defineDefaultProperty(engine, QStringLiteral("destroy"), method_destroy, 0);
    defineDefaultProperty(engine, QStringLiteral("valueOf"), method_valueOf, 0);
    defineDefaultProperty(engine, QStringLiteral("toString"), method_toString, 0);
}

QV4::Value VariantPrototype::method_preserve(SimpleCallContext *ctx)
{
    VariantObject *o = ctx->thisObject.as<QV4::VariantObject>();
    if (o && o->isScarce())
        o->node.remove();
    return Value::undefinedValue();
}

QV4::Value VariantPrototype::method_destroy(SimpleCallContext *ctx)
{
    VariantObject *o = ctx->thisObject.as<QV4::VariantObject>();
    if (o) {
        if (o->isScarce())
            o->node.remove();
        o->data = QVariant();
    }
    return QV4::Value::undefinedValue();
}

QV4::Value VariantPrototype::method_toString(SimpleCallContext *ctx)
{
    VariantObject *o = ctx->thisObject.as<QV4::VariantObject>();
    if (!o)
        return Value::undefinedValue();
    QString result = o->data.toString();
    if (result.isEmpty() && !o->data.canConvert(QVariant::String))
        result = QString::fromLatin1("QVariant(%0)").arg(QString::fromLatin1(o->data.typeName()));
    return Value::fromString(ctx->engine->newString(result));
}

QV4::Value VariantPrototype::method_valueOf(SimpleCallContext *ctx)
{
    VariantObject *o = ctx->thisObject.as<QV4::VariantObject>();
    if (o) {
        QVariant v = o->data;
        switch (v.type()) {
        case QVariant::Invalid:
            return Value::undefinedValue();
        case QVariant::String:
            return Value::fromString(ctx->engine->newString(v.toString()));
        case QVariant::Int:
            return Value::fromInt32(v.toInt());
        case QVariant::Double:
        case QVariant::UInt:
            return Value::fromDouble(v.toDouble());
        case QVariant::Bool:
            return Value::fromBoolean(v.toBool());
        default:
            break;
        }
    }
    return ctx->thisObject;
}

QT_END_NAMESPACE