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

#ifndef QDECLARATIVESTATE_P_H

#define QDECLARATIVESTATE_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include "private/qdeclarativestate_p.h"

#include "private/qdeclarativeanimation_p_p.h"

#include "private/qdeclarativetransitionmanager_p_p.h"

#include <private/qdeclarativeproperty_p.h>

#include <private/qdeclarativeguard_p.h>

#include <private/qobject_p.h>

QT_BEGIN_NAMESPACE

class QDeclarativeSimpleAction

{

public:

    enum State { StartState, EndState };

    QDeclarativeSimpleAction(const QDeclarativeAction &a, State state = StartState) 

    {

        property = a.property;

        specifiedObject = a.specifiedObject;

        specifiedProperty = a.specifiedProperty;

        event = a.event;

        if (state == StartState) {

            value = a.fromValue;

            binding = QDeclarativePropertyPrivate::binding(property);

            reverseEvent = true;

        } else {

            value = a.toValue;

            binding = a.toBinding;

            reverseEvent = false;

        }

    }

    QDeclarativeProperty property;

    QVariant value;

    QDeclarativeAbstractBinding *binding;

    QObject *specifiedObject;

    QString specifiedProperty;

    QDeclarativeActionEvent *event;

    bool reverseEvent;

};

class QDeclarativeStatePrivate : public QObjectPrivate

{

    Q_DECLARE_PUBLIC(QDeclarativeState)

public:

    QDeclarativeStatePrivate()

    : when(0), named(false), inState(false), group(0) {}

    typedef QList<QDeclarativeSimpleAction> SimpleActionList;

    QString name;

    QDeclarativeBinding *when;

    bool named;

    struct OperationGuard : public QDeclarativeGuard<QDeclarativeStateOperation>

    {

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

        QList<OperationGuard> *list;

        void objectDestroyed(QDeclarativeStateOperation *) {

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

            list->removeOne(*this);

        }

    };

    QList<OperationGuard> operations;

    static void operations_append(QDeclarativeListProperty<QDeclarativeStateOperation> *prop, QDeclarativeStateOperation *op) {

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

        list->append(OperationGuard(op, list));

    }

    static void operations_clear(QDeclarativeListProperty<QDeclarativeStateOperation> *prop) {

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

        list->clear();

    }

    static int operations_count(QDeclarativeListProperty<QDeclarativeStateOperation> *prop) {

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

        return list->count();

    }

    static QDeclarativeStateOperation *operations_at(QDeclarativeListProperty<QDeclarativeStateOperation> *prop, int index) {

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

        return list->at(index);

    }

    QDeclarativeTransitionManager transitionManager;

    SimpleActionList revertList;

    QList<QDeclarativeProperty> reverting;

    QString extends;

    mutable bool inState;

    QDeclarativeStateGroup *group;

    QDeclarativeStateOperation::ActionList generateActionList(QDeclarativeStateGroup *) const;

    void complete();

};

QT_END_NAMESPACE

#endif // QDECLARATIVESTATE_P_H