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#include "private/qdeclarativepackage_p.h"

#include <private/qobject_p.h>

#include <private/qdeclarativeguard_p.h>

QT_BEGIN_NAMESPACE

/*!

    \qmlclass Package QDeclarativePackage

    \brief Package provides a collection of named items

    The Package class is currently used in conjunction with

    VisualDataModel to enable delegates with a shared context

    to be provided to multiple views.

    Any item within a Package may be assigned a name via the

    \e {Package.name} attached property.

    The example below creates a Package containing two named items;

    \e list and \e grid.  The third element in the package is parented to whichever

    delegate it should appear in.  This allows an item to move

    between views.

    \snippet examples/declarative/modelviews/package/Delegate.qml 0

    These named items are used as the delegates by the two views who

    reference the special VisualDataModel.parts property to select

    a model which provides the chosen delegate.

    \snippet examples/declarative/modelviews/package/view.qml 0

    \sa QtDeclarative

*/

class QDeclarativePackagePrivate : public QObjectPrivate

{

public:

    QDeclarativePackagePrivate() {}

    struct DataGuard : public QDeclarativeGuard<QObject>

    {

        DataGuard(QObject *obj, QList<DataGuard> *l) : list(l) { (QDeclarativeGuard<QObject>&)*this = obj; }

        QList<DataGuard> *list;

        void objectDestroyed(QObject *) {

            // we assume priv will always be destroyed after objectDestroyed calls

            list->removeOne(*this);

        }

    };

    QList<DataGuard> dataList;

    static void data_append(QDeclarativeListProperty<QObject> *prop, QObject *o) {

        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);

        list->append(DataGuard(o, list));

    }

    static void data_clear(QDeclarativeListProperty<QObject> *prop) {

        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);

        list->clear();

    }

    static QObject *data_at(QDeclarativeListProperty<QObject> *prop, int index) {

        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);

        return list->at(index);

    }

    static int data_count(QDeclarativeListProperty<QObject> *prop) {

        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);

        return list->count();

    }

};

QHash<QObject *, QDeclarativePackageAttached *> QDeclarativePackageAttached::attached;

QDeclarativePackageAttached::QDeclarativePackageAttached(QObject *parent)

: QObject(parent)

{

    attached.insert(parent, this);

}

QDeclarativePackageAttached::~QDeclarativePackageAttached()

{

    attached.remove(parent());

}

QString QDeclarativePackageAttached::name() const 

{ 

    return _name; 

}

void QDeclarativePackageAttached::setName(const QString &n) 

{ 

    _name = n; 

}

QDeclarativePackage::QDeclarativePackage(QObject *parent)

    : QObject(*(new QDeclarativePackagePrivate), parent)

{

}

QDeclarativePackage::~QDeclarativePackage()

{

    Q_D(QDeclarativePackage);

    for (int ii = 0; ii < d->dataList.count(); ++ii) {

        QObject *obj = d->dataList.at(ii);

        obj->setParent(this);

    }

}

QDeclarativeListProperty<QObject> QDeclarativePackage::data()

{

    Q_D(QDeclarativePackage);

    return QDeclarativeListProperty<QObject>(this, &d->dataList, QDeclarativePackagePrivate::data_append, 

                                                        QDeclarativePackagePrivate::data_count, 

                                                        QDeclarativePackagePrivate::data_at, 

                                                        QDeclarativePackagePrivate::data_clear);

}

bool QDeclarativePackage::hasPart(const QString &name)

{

    Q_D(QDeclarativePackage);

    for (int ii = 0; ii < d->dataList.count(); ++ii) {

        QObject *obj = d->dataList.at(ii);

        QDeclarativePackageAttached *a = QDeclarativePackageAttached::attached.value(obj);

        if (a && a->name() == name)

            return true;

    }

    return false;

}

QObject *QDeclarativePackage::part(const QString &name)

{

    Q_D(QDeclarativePackage);

    if (name.isEmpty() && !d->dataList.isEmpty())

        return d->dataList.at(0);

    for (int ii = 0; ii < d->dataList.count(); ++ii) {

        QObject *obj = d->dataList.at(ii);

        QDeclarativePackageAttached *a = QDeclarativePackageAttached::attached.value(obj);

        if (a && a->name() == name)

            return obj;

    }

    if (name == QLatin1String("default") && !d->dataList.isEmpty())

        return d->dataList.at(0);

    return 0;

}

QDeclarativePackageAttached *QDeclarativePackage::qmlAttachedProperties(QObject *o)

{

    return new QDeclarativePackageAttached(o);

}

QT_END_NAMESPACE