qdeclarativelist.cpp

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#include "qdeclarativelist.h"
#include "private/qdeclarativelist_p.h"
#include "private/qdeclarativeengine_p.h"
#include "private/qdeclarativeproperty_p.h"

QT_BEGIN_NAMESPACE

QDeclarativeListReferencePrivate::QDeclarativeListReferencePrivate()
: propertyType(-1), refCount(1)
{
}

QDeclarativeListReference QDeclarativeListReferencePrivate::init(const QDeclarativeListProperty<QObject> &prop, int propType, QDeclarativeEngine *engine)
{
    QDeclarativeListReference rv;

    if (!prop.object) return rv;

    QDeclarativeEnginePrivate *p = engine?QDeclarativeEnginePrivate::get(engine):0;

    int listType = p?p->listType(propType):QDeclarativeMetaType::listType(propType);
    if (listType == -1) return rv;

    rv.d = new QDeclarativeListReferencePrivate;
    rv.d->object = prop.object;
    rv.d->elementType = p?p->rawMetaObjectForType(listType):QDeclarativeMetaType::qmlType(listType)->baseMetaObject();
    rv.d->property = prop;
    rv.d->propertyType = propType;

    return rv;
}

void QDeclarativeListReferencePrivate::addref()
{
    Q_ASSERT(refCount > 0);
    ++refCount;
}

void QDeclarativeListReferencePrivate::release()
{
    Q_ASSERT(refCount > 0);
    --refCount;
    if (!refCount)
        delete this;
}

QDeclarativeListReference::QDeclarativeListReference()
: d(0)
{
}

QDeclarativeListReference::QDeclarativeListReference(QObject *object, const char *property, QDeclarativeEngine *engine)
: d(0)
{
    if (!object || !property) return;

    QDeclarativePropertyCache::Data local;
    QDeclarativePropertyCache::Data *data = 
        QDeclarativePropertyCache::property(engine, object, QLatin1String(property), local);

    if (!data || !(data->flags & QDeclarativePropertyCache::Data::IsQList)) return;

    QDeclarativeEnginePrivate *p = engine?QDeclarativeEnginePrivate::get(engine):0;

    int listType = p?p->listType(data->propType):QDeclarativeMetaType::listType(data->propType);
    if (listType == -1) return;

    d = new QDeclarativeListReferencePrivate;
    d->object = object;
    d->elementType = p?p->rawMetaObjectForType(listType):QDeclarativeMetaType::qmlType(listType)->baseMetaObject();
    d->propertyType = data->propType;

    void *args[] = { &d->property, 0 };
    QMetaObject::metacall(object, QMetaObject::ReadProperty, data->coreIndex, args);
}

QDeclarativeListReference::QDeclarativeListReference(const QDeclarativeListReference &o)
: d(o.d)
{
    if (d) d->addref();
}

QDeclarativeListReference &QDeclarativeListReference::operator=(const QDeclarativeListReference &o)
{
    if (o.d) o.d->addref();
    if (d) d->release();
    d = o.d;
    return *this;
}

QDeclarativeListReference::~QDeclarativeListReference()
{
    if (d) d->release();
}

bool QDeclarativeListReference::isValid() const
{
    return d && d->object;
}

QObject *QDeclarativeListReference::object() const
{
    if (isValid()) return d->object;
    else return 0;
}

const QMetaObject *QDeclarativeListReference::listElementType() const
{
    if (isValid()) return d->elementType;
    else return 0;
}

bool QDeclarativeListReference::canAppend() const
{
    return (isValid() && d->property.append);
}

bool QDeclarativeListReference::canAt() const
{
    return (isValid() && d->property.at);
}

bool QDeclarativeListReference::canClear() const
{
    return (isValid() && d->property.clear);
}

bool QDeclarativeListReference::canCount() const
{
    return (isValid() && d->property.count);
}

bool QDeclarativeListReference::append(QObject *object) const
{
    if (!canAppend()) return false;

    if (object && !QDeclarativePropertyPrivate::canConvert(object->metaObject(), d->elementType))
        return false;

    d->property.append(&d->property, object);

    return true;
}

QObject *QDeclarativeListReference::at(int index) const
{
    if (!canAt()) return 0;

    return d->property.at(&d->property, index);
}

bool QDeclarativeListReference::clear() const
{
    if (!canClear()) return false;

    d->property.clear(&d->property);

    return true;
}

int QDeclarativeListReference::count() const
{
    if (!canCount()) return 0;

    return d->property.count(&d->property);
}

QT_END_NAMESPACE