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#ifndef QMLSTATE_P_H
#define QMLSTATE_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/qmlstate_p.h>
#include <private/qobject_p.h>
#include <private/qmlanimation_p_p.h>
#include <private/qmltransitionmanager_p_p.h>

QT_BEGIN_NAMESPACE

class SimpleAction
{
public:
    enum State { StartState, EndState };
    SimpleAction(const Action &a, State state = StartState) 
    {
        property = a.property;
        specifiedObject = a.specifiedObject;
        specifiedProperty = a.specifiedProperty;
        event = a.event;
        if (state == StartState) {
            value = a.fromValue;
            binding = property.binding();
            reverseEvent = true;
        } else {
            value = a.toValue;
            binding = a.toBinding;
            reverseEvent = false;
        }
    }

    QmlMetaProperty property;
    QVariant value;
    QmlAbstractBinding *binding;
    QObject *specifiedObject;
    QString specifiedProperty;
    ActionEvent *event;
    bool reverseEvent;
};

class QmlStatePrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QmlState)

public:
    QmlStatePrivate()
    : when(0), inState(false), group(0) {}

    typedef QList<SimpleAction> SimpleActionList;

    QString name;
    QmlBinding *when;

    class OperationList;
    struct OperationGuard : public QGuard<QmlStateOperation>
    {
        OperationGuard(QObject *obj, OperationList *l) : list(l) { (QGuard<QObject>&)*this = obj; }
        OperationList *list;
        void objectDestroyed(QmlStateOperation *) {
            // we assume priv will always be destroyed after objectDestroyed calls
            list->removeOne(*this);
        }
    };

    typedef QList<OperationGuard> GuardedOpList;
    class OperationList : public GuardedOpList, public QmlList<QmlStateOperation*>
    {
    public:
        virtual void append(QmlStateOperation* v) { GuardedOpList::append(OperationGuard(v, this)); }
        virtual void insert(int i, QmlStateOperation* v) { GuardedOpList::insert(i, OperationGuard(v, this)); }
        virtual void clear() { GuardedOpList::clear(); }
        virtual QmlStateOperation* at(int i) const { return GuardedOpList::at(i); }
        virtual void removeAt(int i) { GuardedOpList::removeAt(i); }
        virtual int count() const { return GuardedOpList::count(); }
    };
    OperationList operations;

    QmlTransitionManager transitionManager;

    SimpleActionList revertList;
    QList<QmlMetaProperty> reverting;
    QString extends;
    mutable bool inState;
    QmlStateGroup *group;

    QmlStateOperation::ActionList generateActionList(QmlStateGroup *) const;
    void complete();
};

QT_END_NAMESPACE

#endif // QMLSTATE_P_H